JP6976815B2 - Display processing device and display processing method - Google Patents

Description

The present invention relates to a display processing apparatus, a display processing method and a display processing program, and a recording medium on which the display processing program is recorded.

Conventionally, in order to evaluate sound in a sound field space such as a vehicle interior space, a technique for visualizing the acoustic state (sound field) of the sound field space has been proposed. One of these proposed technologies is a technology that calculates the instantaneous acoustic intensity at various positions in the sound field space (hereinafter, also referred to as "listening area") and displays the calculated instantaneous acoustic intensity (patented). Refer to Document 1; hereinafter referred to as "conventional example").

In the technique of the conventional example, the listening area is obtained by multiplying the instantaneous sound pressure of the sound source signal by the instantaneous particle velocity based on the listening area specifying information such as the shape and size of the listening area and the sound source signal for each speaker. Calculate the instantaneous sound intensity at various positions within. Here, the instantaneous sound intensity is a physical quantity including the propagation direction and the propagation intensity (energy) of the sound. Then, the calculated instantaneous acoustic intensity is displayed as a vector by an arrow symbol expressed by a direction (sound propagation direction) and a magnitude (intensity).

Japanese Patent No. 5480748

In the above-mentioned conventional technique, the acoustic information obtained from the display result of the instantaneous acoustic intensity is the sound propagation direction and the intensity. As a result, the evaluator who sees the display result evaluates the sound in the listening area based on the propagation direction and the intensity of the sound at various positions in the listening area.

By the way, according to the findings obtained by the inventor, when evaluating the sound field in the listening area, the difference between the instantaneous sound pressure and the reference value is used at the listener's binaural positions with the sound pressure at quiet time as the reference value. Whether the values are in-phase with the same sign or the difference between the instantaneous sound pressure and the reference value is in the opposite-phase is an important evaluation factor. In addition, the difference value of the instantaneous sound pressure at the positions of both ears of the listener is also an important evaluation factor. However, it is not possible to make an evaluation in consideration of these factors based on the display result in the conventional technique.

In addition, the sound intensity is much higher around the sound source position than around the ear position of the listener who wants to evaluate the sound field with the highest accuracy. For this reason, when an arrow symbol having a length proportional to the intensity in the instantaneous sound intensity is displayed, the length of the arrow becomes too long near the sound source, and the change in sound intensity around the listener's ear position is detected. It cannot be displayed in a manner that is easy for the evaluator to understand.

Therefore, from the viewpoint of improving the evaluation quality of the acoustic state in a predetermined space, a technique capable of displaying the acoustic state in an appropriate manner is desired. Responding to such a request is one of the problems to be solved by the present invention.

The invention according to claim 1 is a display processing device that displays information on acoustic intensity indicating the propagation direction and magnitude of sound in a sound field, based on the instantaneous particle velocity and instantaneous sound pressure of the sound. A calculation unit that calculates the instantaneous acoustic intensity; and a display control unit that displays the information of the acoustic intensity by adding information corresponding to the value of the instantaneous sound pressure to the calculated instantaneous acoustic intensity; The information corresponding to the value of the instantaneous sound pressure is color information, and the display control unit adds a first color as the color information when the value of the instantaneous sound pressure is a non-negative value. The display processing apparatus is characterized in that a second color is added as the color information when the value of the instantaneous sound pressure is a negative value.
The invention according to claim 2 is a display processing device for displaying information on acoustic intensity indicating the propagation direction and magnitude of sound in a sound field, based on the instantaneous particle velocity and instantaneous sound pressure of the sound. A calculation unit that calculates the instantaneous sound intensity; and a display control unit that displays the information of the acoustic intensity by adding information corresponding to the value of the instantaneous sound pressure to the calculated instantaneous sound intensity; The sound field is the internal space of the vehicle, and the acoustic intensity is assumed to be a passenger's ear position using a speaker arranged in the vehicle and outputting the sound toward the internal space as a sound source. It is a display processing device characterized by being a sound intensity on a surface passing through.
The invention according to claim 4 is a display processing device for displaying information on acoustic intensity indicating the propagation direction and magnitude of sound in a sound field, based on the instantaneous particle velocity and instantaneous sound pressure of the sound. A calculation unit that calculates the instantaneous sound intensity; and a display control unit that displays the information of the acoustic intensity by adding information corresponding to the value of the instantaneous sound pressure to the calculated instantaneous sound intensity; The change in the magnitude information contained in the sound intensity information according to the increase in the magnitude of the instantaneous sound intensity is monotonous and non-decreasing.
When displaying the sound intensity information as a symbol, when the length of the symbol corresponding to the magnitude of the instantaneous sound intensity is equal to or longer than a predetermined length, the sound intensity information is displayed as a symbol. Let the length of the symbol be the predetermined length,
It is a display processing device characterized by the above.

The invention according to claim 7 is a display processing device that displays information on acoustic intensity indicating the propagation direction and magnitude of sound in a sound field, and is based on the particle velocity and sound pressure of the sound. A calculation unit for calculating a city; a display control unit for generating sound intensity information based on the sound intensity and displaying the generated sound intensity information on a display unit; The control unit determines that the change in the magnitude information included in the sound intensity information according to the increase in the calculated acoustic intensity magnitude is monotonous and non-decreasing, and the sound intensity information is obtained. When the length of the symbol corresponding to the calculated magnitude of the sound intensity is longer than the predetermined length in displaying the symbol, the length of the symbol when displaying the information of the sound intensity as a symbol is used. It is a display processing apparatus characterized in that it is displayed on the display unit as the predetermined length.

The invention according to claim 9 comprises a calculation unit and a display control unit; and is a display process used in a display processing device that displays information on acoustic intensity indicating the propagation direction and magnitude of sound in a sound field. In the method, the calculation unit calculates the instantaneous acoustic intensity based on the instantaneous particle velocity and the instantaneous sound pressure of the sound; and the display control unit determines the calculated instantaneous acoustic intensity. A display control step of displaying information on the acoustic intensity on the display unit to which information corresponding to the value of the instantaneous sound pressure is added; is provided, and the information corresponding to the value of the instantaneous sound pressure is color information. In the display control step, the display control unit adds a first color as the color information when the value of the instantaneous sound pressure is a non-negative value, and when the value of the instantaneous sound pressure is a negative value, the color. This is a display processing method characterized in that a second color is added as information.

The invention according to claim 10 is a display processing program characterized in that a computer included in the display processing apparatus is made to execute the display processing method according to claim 9.

The invention according to claim 11 is a recording medium, wherein the display processing program according to claim 10 is recorded so as to be readable by a computer included in the display processing apparatus.

It is a block diagram which shows the structure of the display processing apparatus which concerns on 1st Embodiment of this invention. It is a block diagram which shows the structure of the display processing apparatus which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the schematic structure of the display processing apparatus which concerns on 1st Embodiment of this invention. It is a figure for demonstrating the sound field space in 1st Example. Instantaneous Acoustic of intensity magnitude in the first embodiment | and the size information in the information of sound intensity | | TIN _P (t) is a diagram showing the relationship between | SIN _P (t). It is a flowchart for demonstrating display control processing in 1st Embodiment. It is a figure which shows the display example (the 1) in 1st Example, and the comparative example thereof. It is a figure which shows the display example (the 2) in 1st Example, and the comparative example thereof. It is a figure which shows the display example (the 3) in the 1st Example, and the comparative example thereof. It is a block diagram which shows the schematic structure of the display processing apparatus which concerns on 2nd Embodiment of this invention. It is a figure for demonstrating the modification of the relation between the size | TIN _P (t) | and the size information | SIN _{P (t) |.}

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description and drawings, the same or equivalent elements are designated by the same reference numerals, and duplicate description will be omitted.

[First Embodiment]
First, the first embodiment of the present invention will be described with reference to FIG.

<Structure>
FIG. 1 shows a schematic configuration of the display processing apparatus 700A according to the first embodiment. As shown in FIG. 1, the display processing device 700A includes a storage unit 710A, a velocity potential calculation unit 720, an instantaneous particle velocity calculation unit 730, and an instantaneous sound pressure calculation unit 740. Further, the display processing device 700A includes an instantaneous sound intensity calculation unit 750, a display control unit 760, and a display unit 770.

In the storage unit 710A, the shape data of the sound field space to be analyzed (design data or measurement data of the sound field space), the wall surface in the sound field space (the body surface of the listener, the outer surface of the seat in the case of a vehicle, etc.) Sound absorption coefficient data at each position (including), sound source data (speaker position data, etc.), and sound field specific data such as medium density are stored. The velocity potential calculation unit 720 is accessible to the storage unit 710A.

The velocity potential calculation unit 720 calculates the velocity potential φ (ω) in the frequency domain in the steady state in the sound field space based on the sound field identification data stored in the storage unit 710A. The velocity potential φ (ω) calculated in this way is sent to the instantaneous particle velocity calculation unit 730 and the instantaneous sound pressure calculation unit 740.

In the first embodiment, the velocity potential calculation unit 720 uses the finite element method for the velocity potential φ (ω), and the reference (“First Acoustic Numerical Simulation Programming Guide” edited by the Japan Institute of Architecture, Corona, 2012. The velocity potential φ (ω) is calculated by the method described in (issued on November 30, 2014).

The instantaneous particle velocity calculation unit 730 receives the velocity potential φ (ω) sent from the velocity potential calculation unit 720. Then, the instantaneous particle velocity calculation unit 730 calculates the instantaneous particle velocity u (t).

In calculating the instantaneous particle velocity u (t), the instantaneous particle velocity calculation unit 730 first performs an inverse Fourier transform on the velocity potential φ (ω) to calculate the velocity potential φ (t) in the time domain. Subsequently, the instantaneous particle velocity calculation unit 730 calculates the instantaneous particle velocity u (t) by the following equation (1).
u (t) = gradient (φ (t)) ... (1)
The instantaneous particle velocity u (t) calculated in this way is sent to the instantaneous sound intensity calculation unit 750.

The instantaneous sound pressure calculation unit 740 receives the velocity potential φ (ω) sent from the velocity potential calculation unit 720. Then, the instantaneous sound pressure calculation unit 740 calculates the instantaneous sound pressure p (t).

In calculating the instantaneous sound pressure p (t), the instantaneous sound pressure calculation unit 740 first calculates the instantaneous sound pressure p (ω) in the frequency domain by the following equation (2).
p (ω) = ρ ・ (∂φ (ω) / ∂t) = j ・ ω ・ ρ ・ φ (ω)… (2)
Here, "j" is an imaginary unit and "ρ" is the medium density.

Subsequently, the instantaneous sound pressure calculation unit 740 performs an inverse Fourier transform on the instantaneous sound pressure p (ω) to calculate the instantaneous sound pressure p (t) in the time domain. The instantaneous sound pressure p (t) calculated in this way is sent to the instantaneous sound intensity calculation unit 750 and the display control unit 760.

The instantaneous sound intensity calculation unit 750 receives the instantaneous particle velocity u (t) sent from the instantaneous particle velocity calculation unit 730 and the instantaneous sound pressure p (t) sent from the instantaneous sound pressure calculation unit 740. .. Then, the instantaneous sound intensity calculation unit 750 receives the instantaneous sound intensity at each position P on the surface (hereinafter referred to as “analysis surface”) on which the sound output from the sound source passes through the assumed ear position of the passenger. Calculate TIN _P (t).

When calculating such instantaneous sound intensity TIN _P (t), the instantaneous sound intensity calculation unit 750, a frequency to be analyzed as an "f", defines a sinusoidal sig (t) by the following equation (3).
sig (t) = sin (ω ・ t)… (3)

Subsequently, the instantaneous sound intensity calculation unit 750 performs _{a convolution calculation of the instantaneous particle velocity u P} (t) and the sine wave sig (t) at each position P on the analysis surface by the following equation (4). _{The convolution instantaneous particle velocity usig, P} (τ) at each position P on the analysis surface is calculated.

Here, "τ" is the time to be calculated. Further, "T" is a time during which the instantaneous particle velocity u (t) in the equation (1) decays, which is a time similar to the relaxation time of the impulse response.

Further, the instantaneous sound intensity calculation unit 750 performs _{a convolution calculation of the instantaneous sound pressure p P} (t) and the sine wave sig (t) at each position P on the analysis surface by the following equation (5). _{The convolutional instantaneous sound pressure p sig, P} (t) at each position P on the analysis surface is calculated.

Here, "τ" and "T" are the same as in the case of the above-mentioned equation (4).

Then, the instantaneous sound intensity calculation unit 750, the formula (4) (5) from the following equation (6), to calculate the instantaneous sound intensity TIN _P (t) at time t for each position P on the analysis surface and it sends to the instantaneous sound intensity TIN _P (t) the display control unit 760 the calculated.

^{In addition, "u *} _{sig, P} (t)" in the equation (6) is a complex conjugate of "convolution instantaneous particle velocity u _{sig, P} (t)".

Further, the calculation result by the formula (6) is "instantaneous active intensity" indicating the flow of energy, but in the present specification, the calculation result by the formula (6) is referred to as "instantaneous sound intensity". do.

Instantaneous sound intensity TIN _P (t) is a vector with a propagation strength, and a propagation direction. In the following, the size of the vectors shall be referred to as "size | | TIN _P (t)".

The above display control unit 760, instantaneous sound pressure calculator instantaneous sound sent from the 740 pressure p (t), and receives the instantaneous sent from the instantaneous sound intensity calculation unit 750 sound intensity TIN _P (t) .. Subsequently, the display control unit 760 _{calculates the sound intensity information SIN P} (t) at each position P on the analysis surface.

In calculating the acoustic intensity information SIN _P (t), the display control unit 760 first obtains color information corresponding to the value _{of the instantaneous sound pressure p P (t) at each position P on the analysis surface.} In addition to the city TIN _P (t), the sound intensity information before the size adjustment is generated. In the first embodiment, when _{the value of the instantaneous sound pressure p P} (t) is non-negative, the color information is set to "black", and _{the value of the instantaneous sound pressure p P} (t) is negative. If so, the color information is set to "white".

Subsequently, the display control unit 760 sets _{the direction of the instantaneous sound intensity TIN P} (t) to the direction of the sound intensity information SIN _P (t), and _{the magnitude of the instantaneous sound intensity TIN P} (t) | TIN. _{Adjust P} (t) | to make the sound intensity information SIN _P (t) magnitude information | SIN _P (t) |. When adjusting this size information, the display control unit 760 determines the size when the size | TIN _P (t) | is equal to or greater than the _{predetermined value INT TH} or more | the size information according to the increase of the _{TIN P (t) |.} SIN _P (t) | nonnegative rate of increase of the magnitude | TIN _P (t) | is the magnitude in the case of less than the predetermined value _{INT TH | TIN P (t)} | magnitude information corresponding to the increase in | Adjustments are made so that the increase rate of SIN _P (t) | is smaller than that of SIN P (t) | (see FIGS. 5 and 11 described later).

In the first embodiment, the rate of increase of | SIN _{P (t) | when the size | TIN P} (t) | is _{less than the predetermined value INT TH} is set to "1", and the size | TIN _P (t). _{The rate of increase of | SIN P} (t) | when | is equal to or greater than a _{predetermined value INT TH} is set to “0” (see FIG. 5 described later).

That is, the size | TIN _P (t) | if is less than a predetermined value INT _TH, the size information of the information of sound intensity | SIN _P (t) | of the magnitude | TIN _P (t) | and do. On the other hand, when the magnitude | TIN _P (t) | is equal to _{or greater than the predetermined value INT TH} , the magnitude information | SIN _P (t) | of the _{sound intensity information is set to the predetermined value INT TH} (see the figure to be described later). 5).

The predetermined value INT _TH prevents the length of the arrow near the sound source position from becoming too long, making it difficult to easily grasp the state of the sound field from the sound source position to the ear position. It is predetermined based on experiments, simulations, experiences, etc. from the viewpoint of displaying the mode in which the state of the sound field can be easily grasped.

When the sound intensity information SIN _P (t) is calculated in this way, the display control unit 760 _{generates display data for displaying the sound intensity information SIN P} (t) on the display unit 770 as an arrow. The display data thus generated is sent to the display unit 770.

The display unit 770 is configured to include a display device such as a liquid crystal display device. The display unit 770 receives the display data sent from the display control unit 760. Then, the display unit 770 displays an image corresponding to the display data.

<Operation>
Next, the operation of the display processing apparatus 700A configured as described above will be described mainly focusing on the processing by the above-mentioned elements 720 to 760.

It is assumed that the sound field specific data is stored in the storage unit 710A.

Upon receiving a display processing start command specifying the frequency f to be analyzed via an input unit (not shown) or the like, the display processing device 700A starts the display processing. In such display processing, in the display processing apparatus 700A, first, the velocity potential calculation unit 720 first, as described above, based on the sound field identification data stored in the storage unit 710A, the velocity potential in the frequency domain in the steady state. Calculate φ (ω). Then, the velocity potential calculation unit 720 sends the calculated velocity potential φ (ω) to the instantaneous particle velocity calculation unit 730 and the instantaneous sound pressure calculation unit 740.

Upon receiving the velocity potential φ (ω), the instantaneous particle velocity calculation unit 730 first performs an inverse Fourier transform on the velocity potential φ (ω) to calculate the velocity potential φ (t). Subsequently, the instantaneous particle velocity calculation unit 730 calculates the instantaneous particle velocity u (t) by the above-mentioned equation (1). Then, the instantaneous particle velocity calculation unit 730 sends the calculated instantaneous particle velocity u (t) to the instantaneous sound intensity calculation unit 750.

Further, upon receiving the velocity potential φ (ω), the instantaneous sound pressure calculation unit 740 first calculates the instantaneous sound pressure p (ω) by the above-mentioned equation (2). Subsequently, the instantaneous sound pressure calculation unit 740 calculates the instantaneous sound pressure p (t) by inverse Fourier transforming the instantaneous sound pressure p (ω). Then, the instantaneous sound pressure calculation unit 740 sends the calculated instantaneous sound pressure p (t) to the instantaneous sound intensity calculation unit 750 and the display control unit 760.

When the instantaneous acoustic intensity calculation unit 750 receives the instantaneous particle velocity u (t) and the instantaneous sound pressure p (t), first, the convolution instantaneous particle velocity _{usig, P is performed by the above-mentioned equations (3) and (4).} In addition to calculating (t), the convolution instantaneous sound pressure p _{sig, P} (t) is calculated by the above-mentioned equations (3) and (5). Subsequently, the instantaneous sound intensity calculation unit 750, by the aforementioned equation (6), calculates the instantaneous sound intensity TIN _P (t). Then, the instantaneous sound intensity calculation unit 750 sends to the instantaneous sound intensity TIN _P (t) the display control unit 760 the calculated.

When receiving the instantaneous sound pressure p (t) and the instantaneous sound intensity TIN _P (t), the display control unit 760, first, corresponding to the value of the instantaneous sound pressure p _P (t) at each position P on the analysis surface by adding the color information instantly sound intensity TIN _P (t), generates information sound intensity before size adjustment. As described above, in the first embodiment, if the value of the instantaneous sound pressure p _P (t) is a non-negative, "black" is added as the color information, also instantaneous sound pressure p _P ( If the value of t) is negative, "white" is added as color information.

Subsequently, the display control unit 760 sets the direction included in the sound intensity information before the size adjustment as the direction information of the sound intensity information SIN _P (t), and the sound intensity information before the size adjustment. size contained in | TIN _P (t) | by adjusting the size information of the information of sound intensity _{SIN P (t) | SIN P} (t) | by the information of sound intensity SIN _P (T) is calculated. In adjusting the size, in the first embodiment, as described above, the display control unit 760 _{changes the size information | SIN P} (t) | with the increase of the size _{| TIN P (t) |.} the rate, magnitude | TIN _P (t) | if is less than a predetermined value INT _TH is set to "1", the magnitude | TIN _P (t) | when is a predetermined value or more INT _TH is "0" do.

When the sound intensity information SIN _P (t) is calculated in this way, the display control unit 760 _{generates display data for displaying the sound intensity information SIN P} (t) on the display unit 770 as an arrow. The display data thus generated is sent to the display unit 770. As a result, the sound intensity information SIN _P (t) is displayed on the display unit 770.

In the first embodiment, the display control unit 760 generates display data for displaying the time change of _{the sound intensity information SIN P (t) synchronized with the sound propagation on the display unit 770 by moving images.} It has become like.

As described above, in the display processing device 700A of the first embodiment, the velocity potential calculation unit 720 calculates the velocity potential φ (ω) in the frequency region of the steady state in the sound field based on the sound field specific data. .. Subsequently, the instantaneous particle velocity calculation unit 730 calculates the instantaneous particle velocity u (t) based on the velocity potential φ (ω), and the instantaneous sound pressure calculation unit 740 calculates the instantaneous sound pressure p (t).

Next, the instantaneous sound intensity calculation unit 750, based on the instantaneous particle velocity u (t) and the instantaneous sound pressure p (t), calculates the instantaneous sound intensity TIN _P (t). Subsequently, the display control unit 760, instantaneous sound pressure p _P sound intensity information SIN _P (t) display unit 770 to which the color information is added to the instantaneous sound intensity TIN _P (t) corresponding to the value of (t) Generate display data for display in. Then, the display control unit 760 sends the generated display data to the display unit 770, _{and causes the display unit 770 to display the sound intensity information SIN P} (t).

Therefore, according to the first embodiment, is the value of the difference between the instantaneous sound pressure and the reference value in the same phase at the listener's binaural positions with the sound pressure at the time of quiet as the reference value? , It is possible to visually grasp whether the value of the difference between the instantaneous sound pressure and the reference value is the opposite phase, which is the opposite sign. Therefore, according to the first embodiment, it is possible to improve the evaluation quality of the acoustic state in the sound field space.

Further, in the first embodiment _{, when the value of the instantaneous sound pressure p P} (t) is a non-negative value, "black" is added as the color information, and the value of the instantaneous sound pressure p _P (t) is a negative value. In the case of, "white" is added as color information. As a result, for example, the instantaneous sound pressure is in-phase or out-of-phase at the listener's binaural positions, which cannot be determined by the display shown in FIG. 7 (B) described later (display by the conventional technique). As shown in FIG. 7A, the display can be visually grasped in a clear manner. Therefore, from the viewpoint of the listener's sense of hearing, it is possible to improve the evaluation quality of the acoustic state in the sound field space.

Further, in the first embodiment, as the magnitude | TIN _P (t) | of _{the instantaneous sound intensity TIN P} (t) increases, until _{the magnitude | TIN P} (t) | becomes a predetermined value INT _TH. , size information included in the sound intensity information SIN _P (t) | with the rate of change between "1", the magnitude _{| | SIN P (t) TIN} P (t) | is a predetermined value INT _TH After exceeding, the rate of change of the size information | SIN _P (t) | is set to "0". As a result, the length of the arrow in the arrow display of the _{sound intensity information SIN P} (t) around the sound source position is suppressed. In addition, the length of the arrow in the arrow display of the _{acoustic intensity information SIN P} (t) around the ear position of the listener who wants to evaluate the sound field most accurately _{reflects the size | TIN P} (t) |. It is said to be. As a result, for example, in the display shown in FIG. 9 (B) described later (display by the conventional technique), the arrow of the vector of the sound source position becomes too long, and it is possible to grasp what kind of state the sound field is. What was difficult to do is a display in which the state of the vector can be easily grasped from the sound source position to the ear position, as shown in FIG. 9A. _{Therefore, the sound intensity information SIN P} (t) can be displayed in a manner that makes it easy to grasp the state of the sound around the listener's ear position, and the sound field space in the sound field space from the viewpoint of the listener's hearing. It is possible to further improve the evaluation quality of the acoustic condition.

_{Further, in the first embodiment, the time change of the information SIN P} (t) of the acoustic intensity synchronized with the sound propagation is displayed on the display unit 770 by a moving image. Therefore, since the time change of the sound intensity information SIN _P (t) is dynamically displayed, it is possible to further improve the evaluation quality of the acoustic state in the sound field space. As shown in FIG. 8A, in the present invention, the state in which sound is transmitted can be clearly seen. However, in the case of the conventional technique shown in FIG. 8B, there is a problem that the state in which sound is transmitted is not well understood.

_{Further, in the first embodiment, the information SIN P} (t) of the acoustic intensity on the surface where the sound output from the sound source passes through the assumed ear position of the passenger is calculated. Therefore, the calculation load of the sound intensity information SIN _P (t) can be reasonably suppressed.

[Second Embodiment]
Next, the second embodiment of the present invention will be described mainly with reference to FIG.

<Structure>
FIG. 2 shows a schematic configuration of the display processing apparatus 700B according to the second embodiment. As shown in FIG. 2, the display processing device 700B is connected to a sound source unit 910 and an instantaneous particle velocity / instantaneous sound pressure measuring unit 920 arranged outside the display processing device 700B.

The sound source unit 910 is configured to include a speaker. When the sound source unit 910 receives a sound output command sent from the display processing device 700B and specifies the frequency f to be analyzed, the sound source unit 910 outputs the sound of the specified frequency f toward the sound field space to be analyzed. ..

The instantaneous particle velocity / instantaneous sound pressure measuring unit 920 described above is configured to include a plurality of microphones. When the instantaneous particle velocity / instantaneous sound pressure measuring unit 920 receives the measurement start command sent from the display processing device 700B, the instantaneous particle velocity at each position of the plurality of microphones is based on the sound collection results of the plurality of microphones. U (t) and instantaneous sound pressure P (t) are calculated. The instantaneous particle velocity U (t) and the instantaneous sound pressure P (t) calculated in this way are sent to the display processing device 700B as a measurement result together with the identifiers of the plurality of microphones.
<< Configuration of display processing device 700B >>
Next, the configuration of the display processing device 700B will be described.

As shown in FIG. 2, the display processing device 700B includes a storage unit 710B instead of the storage unit 710A as compared with the display processing device 700A (see FIG. 1) of the first embodiment described above, and the speed. The difference is that the collection unit 780 is provided in place of the potential calculation unit 720, the instantaneous particle velocity calculation unit 730, and the instantaneous sound pressure calculation unit 740. Hereinafter, these differences will be mainly focused on.

In the storage unit 710B, the arrangement position at the time of measurement of each of the plurality of microphones included in the instantaneous particle velocity / instantaneous sound pressure measurement unit 920 is associated with the identifiers of the plurality of microphones and stored as measurement position data. .. The collection unit 780 is accessible to the storage unit 710B.

The above-mentioned collecting unit 780 sends a sound output command specifying the frequency f to be analyzed to the sound source unit 910, and also sends a measurement start command to the instantaneous particle velocity / instantaneous sound pressure measuring unit 920. Subsequently, the collecting unit 780 receives the measurement result sent from the instantaneous particle velocity / instantaneous sound pressure measuring unit 920.

Further, the collecting unit 780 performs interpolation or the like based on the measurement result and the measurement position data stored in the storage unit 710B, and performs the instantaneous particle velocity u (t) and the instantaneous sound pressure described in the first embodiment. Calculate p (t). The instantaneous particle velocity u (t) calculated in this way is sent to the instantaneous sound intensity calculation unit 750. Further, the calculated instantaneous sound pressure p (t) is sent to the instantaneous sound intensity calculation unit 750 and the display control unit 760.

<Operation>
Next, the operation of the display processing apparatus 700B configured as described above will be described mainly focusing on the processing by the above-mentioned elements 750, 760, and 780.

It is assumed that the storage unit 710B stores the arrangement positions of the plurality of microphones included in the instantaneous particle velocity / instantaneous sound pressure measurement unit 920 at the time of measurement in association with the identifiers of the plurality of microphones. Further, it is assumed that each of the plurality of microphones is arranged at the arrangement position at the time of measurement stored in the storage unit 710B.

Upon receiving a display processing start command specifying the frequency f to be analyzed via an input unit (not shown) or the like, the display processing device 700B starts the display processing. In such display processing, in the display processing device 700B, the collection unit 780 first sends a sound output command specifying the frequency f to be analyzed to the sound source unit 910, and first sends a measurement start command to the instantaneous particle velocity / instantaneous sound. It is sent to the pressure measuring unit 920.

As a result, the sound source unit 910 starts outputting a sound having a designated frequency. Further, the instantaneous particle velocity / instantaneous sound pressure measuring unit 920 starts the measurement. Then, the instantaneous particle velocity / instantaneous sound pressure measuring unit 920 sends the measurement result to the display processing device 700B.

In the display processing apparatus 700B, the collecting unit 780 receives the measurement result. Subsequently, the collecting unit 780 calculates the instantaneous particle velocity u (t) and the instantaneous sound pressure p (t) as described above based on the measurement result while referring to the position information data in the storage unit 710B.

Then, the collecting unit 780 sends the calculated instantaneous particle velocity u (t) to the instantaneous sound intensity calculation unit 750. Further, the collecting unit 780 sends the calculated instantaneous sound pressure p (t) to the instantaneous acoustic intensity calculation unit 750 and the display control unit 760.

When receiving the instantaneous particle velocity u (t) and the instantaneous sound pressure p (t), the instantaneous sound intensity calculation unit 750, calculated in the same manner as in the first embodiment, the instantaneous sound intensity TIN _P a (t) do. Then, the instantaneous sound intensity calculation unit 750 sends to the instantaneous sound intensity TIN _P (t) the display control unit 760 the calculated.

When receiving the instantaneous sound pressure p _P (t) and the instantaneous sound intensity TIN _P (t), the display control unit 760, as in the case of the first embodiment, the sound intensity information SIN _P (t) After the calculation, display data for displaying the time change of the sound intensity information SIN _P (t) on the display unit 770 by moving image is generated. Then, the display control unit 760 sends the generated display data to the display unit 770. As a result, the sound intensity information SIN _P (t) is displayed on the display unit 770.

As described above, in the display processing device 700B of the second embodiment, the collecting unit 780 receives the measurement result by the instantaneous particle velocity / instantaneous sound pressure measuring unit 920. Subsequently, the collecting unit 780 calculates the instantaneous particle velocity u (t) and the instantaneous sound pressure p (t). Then, the collecting unit 780 sends the calculated instantaneous particle velocity u (t) to the instantaneous sound intensity calculation unit 750. Further, the collecting unit 780 sends the calculated instantaneous sound pressure p (t) to the instantaneous acoustic intensity calculation unit 750 and the display control unit 760.

When receiving the instantaneous particle velocity u (t) and the instantaneous sound pressure p (t), the instantaneous sound intensity calculation unit 750, calculated in the same manner as in the first embodiment, the instantaneous sound intensity TIN _P a (t) do. Then, the instantaneous sound intensity calculation unit 750 sends to the instantaneous sound intensity TIN _P (t) the display control unit 760 the calculated.

When receiving the instantaneous sound pressure p (t) and the instantaneous sound intensity TIN _P (t), the display control unit 760, as in the case of the first embodiment, calculates the information of sound intensity SIN _P (t) After that, display data for displaying the sound intensity information SIN _P (t) on the display unit 770 is generated. Then, the display control unit 760 sends the generated display data to the display unit 770. As a result, the sound intensity information SIN _P (t) is displayed on the display unit 770.

Therefore, according to the second embodiment, the same effect as in the case of the first embodiment described above can be obtained.

[Modification of Embodiment]
The present invention is not limited to the first and second embodiments described above, and various modifications are possible.

For example, in the above-mentioned first embodiment, the finite element method is adopted in calculating the velocity potential φ (t), but other methods such as the time domain finite difference method may be adopted.

Further, in the first and second embodiments described above, when the value of the instantaneous sound pressure is a non-negative value, "black" is added as color information to the instantaneous sound intensity, and the instantaneous sound pressure p (t) is added. When the value is negative, "white" is added as color information to the instantaneous sound intensity. On the other hand, if the color information of the color is different depending on whether the value of the instantaneous sound pressure is a non-negative value or a negative value, arbitrary color information can be added to the instantaneous sound intensity.

Further, in the first and second embodiments described above, it is assumed that the color information added to the instantaneous sound intensity is "black" and "white" having the same tone, but the tone corresponds to the value of the instantaneous sound pressure. The color information of the color of is added to the instantaneous sound intensity. In this case, in addition to whether the sound pressures in both ears of the assumed listener are in-phase or out-of-phase, the difference in sound pressure between both ears can be visualized.

Further, the color information of different colors may be added to the instantaneous sound intensity according to the value of the instantaneous sound pressure. Also in this case, in addition to whether the sound pressures in both ears of the assumed listener are in-phase or out-of-phase, the difference in sound pressure between both ears can be visualized.

Further, in the first and second embodiments described above, it is assumed that the same line type (for example, solid line) is adopted when displaying the arrow of the sound intensity information. On the other hand, instead of the color information, line type information (for example, solid line and broken line) different from each other depending on whether the instantaneous sound pressure value is a non-negative value or a negative value is added to the instantaneous sound intensity. You may.

In the first and second embodiments described above, the magnitude | accordance with an increase in the magnitude _{| | TIN P (t) TIN} P (t) | is until the predetermined value INT _TH, size information | The _{rate of change of SIN P} (t) | is set to "1", and after the size | TIN _P (t) | _{exceeds the predetermined value INT TH} , the rate of change of size information | SIN _{P (t) |} Was set to "0" (see FIG. 5 described later). On the other hand, an arbitrary value C ₁ (> 0) may be adopted instead of “1”.

Further, _{the change in the rate of change of the size information | SIN P} (t) | in response to the increase in the size _{| TIN P} (t) | may be a change in the mode of monotonous non-increase while maintaining that it is non-negative. Good (see Figure 11 below). In this case, for example, _{the relationship between the size | TIN P} (t) | and the size information | SIN _P (t) | can be the relationship represented by the following equation (7).
_{| SIN P (t) | =} C · log [| TIN P (t) | +1] ... (7)
Here, "C" is a constant.

Incidentally, when employing the expression (7) also, size information | SIN _P (t) | when the calculation result exceeds a predetermined value INT _TH, the magnitude information | SIN _P (t) | a The predetermined value INT _TH is adopted.

Further, in the first and second embodiments described above, when the sound intensity information is generated, the color information is added to the instantaneous sound intensity, but the addition of the color information may be omitted. good. In this case, instead of the instantaneous sound intensity, a sound intensity that is not "instantaneous" may be adopted to generate sound intensity information.

Further, in the first and second embodiments described above, the display of the sound intensity information is an arrow display, but if the length is a symbol expressing the size information, a display using a symbol other than the arrow is used. You may do it.

Further, in the first and second embodiments described above, the display processing device is provided with a storage unit and a display unit, but resources that can be used as at least one of the storage unit and the display unit are provided outside the display processing device. If it exists, the available resource may be used, and the component substitutable by the available resource may be omitted as a component of the display processing device.

In addition, a part or all of the display processing devices 700A and 700B of the first and second embodiments may be used as a calculation unit including a central processing unit (CPU), a DSP (Digital Signal Processor) and the like. It may be configured as a computer system having a computer, and a part or all of the functions of the display processing units 700A and 700B may be fulfilled by executing a program prepared in advance on the computer. Such a program is recorded on a computer-readable recording medium such as a hard disk, flash memory, CD-ROM, or DVD, and is loaded and executed from the recording medium by the computer. Further, this program may be acquired in the form of being recorded on a portable recording medium such as a CD-ROM or DVD, or may be acquired in the form of distribution via a network such as the Internet. May be good.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 3 to 11. In the following description and drawings, the same or equivalent elements will be designated by the same reference numerals including the above-described embodiment, and duplicate description will be omitted.

[First Example]
First, the first embodiment will be described mainly with reference to FIGS. 3 to 9.

<Structure>
FIG. 3 shows a schematic configuration of the display processing apparatus 100A according to the first embodiment. The display processing device 100A is one aspect of the display processing device 700A (see FIG. 1) of the above-described embodiment.

As shown in FIG. 3, the display processing device 100A includes a processing control unit 110A and a storage unit 120A. Further, the display processing device 100A includes an input unit 130 and a display unit 140. Further, the display processing device 100A includes a communication unit 150.

The processing control unit 110A controls the entire display processing device 100A and performs various processing. The processing control unit 110A will be described later.

The storage unit 120A is configured to include a non-volatile storage element, and stores various information data used in the display processing device 100A. Such information data includes the shape data of the sound field space to be analyzed (design data or measurement data of the sound field space), the wall surface in the sound field space (the body surface of the listener, the outer surface of the seat in the case of a vehicle, etc.). ), Sound absorption coefficient data, sound source data (speaker position data, etc.), and sound field specific data such as medium density are included.

The processing control unit 110A can access the storage unit 120A. That is, the storage unit 120A fulfills the function of the storage unit 710A in the above-mentioned first embodiment.

The input unit 130 is composed of a key unit provided on the main body of the display processing device 100A and / or a remote input device including the key unit. Here, as the key unit provided on the main body unit, the touch panel provided on the display device of the display unit 140 can be used. It should be noted that it is also possible to adopt a configuration in which voice input is performed by using voice recognition technology instead of or in combination with a configuration having a key unit.

When the user operates the input unit 130, the processing content of the display processing device 100A is specified or a command is given. Such a command includes a display processing start command by the processing control unit 110A and the like. The start command includes the designation of the frequency f to be analyzed.

The display unit 140 receives the display data sent from the processing control unit 110A. Then, the display unit 140 displays an image corresponding to the display data. The image displayed on the display unit 140 in this way includes a moving image showing a change in _{the information SIN P (t) of the acoustic intensity in the sound field space.} That is, the display unit 140 functions as the display unit 770 according to the first embodiment described above.

The communication unit 150 communicates with an external device via the network 500 under the control of the processing control unit 110A. In the first embodiment, the above-mentioned sound field specific data is acquired by using the communication unit 150.

Next, the above-mentioned processing control unit 110A will be described. The processing control unit 110A includes a central processing unit (CPU), a DSP, and peripheral circuits (including a timekeeping mechanism). By executing various programs by the processing control unit 110A, various functions as the display processing device 100A are realized. These functions include the functions of the velocity potential calculation unit 720, the instantaneous particle velocity calculation unit 730, the instantaneous sound pressure calculation unit 740, the instantaneous acoustic intensity calculation unit 750, and the display control unit 760 in the first embodiment described above. It has been.

Further, the processing control unit 110A uses the communication unit 150 to acquire sound field specific data relating to the sound field space to be analyzed. Then, the processing control unit 110A stores the acquired sound field specific data in the storage unit 120A.

The program executed by the processing control unit 110A is recorded on a computer-readable recording medium such as a hard disk, flash memory, CD-ROM, or DVD, and is loaded and executed from the recording medium. Further, this program may be acquired in the form of being recorded on a portable recording medium such as a CD-ROM or DVD, or may be acquired in the form of distribution via a network such as the Internet. May be good.

Here, the example of the sound field space to be analyzed and _{the magnitude information of the sound intensity information SIN P} (t) _{adopted in the first embodiment | SIN P} (t) | and the instantaneous sound intensity TIN. _{The relationship with the magnitude of P} (t) | TIN _P (t) | will be described.

<< Example of sound field space to be analyzed >>
FIG. 4 shows the shape of the space inside the vehicle, which is an example of the sound field space to be analyzed. As shown in FIG. 4, a driver's seat DS, a passenger seat AS, and a rear seat RS are arranged in the vehicle. Then, it is assumed that the listeners LND and LNA are seated in the driver's seat DS and the passenger seat AS. Further, it is assumed that the sound source is a front speaker arranged at the position POS.

In FIG. 4, the illustration of the inner wall of the vehicle is omitted. Hereinafter, the sound field space having the shape shown in FIG. 4 will be described as a sound field analysis.

<< | SIN _P (t) | and size | TIN _P (t) |
FIG. 5 shows the relationship between _{| SIN P} (t) | and the size | TIN _P (t) | adopted in the first embodiment. In the first embodiment, as shown in FIG. 5, the magnitude | TIN _P (t) | accordance with an increase in the magnitude | TIN _P (t) | is until the predetermined value INT _TH, size information The rate of change of | SIN _P (t) | is set to "1", and after the size | TIN _P (t) | _{exceeds the predetermined value INT TH} , the change of the size information | SIN _P (t) | The rate is set to "0".

That is, when the magnitude | TIN _P (t) | is _{less than the predetermined value INT TH} , the magnitude information | SIN _P (t) | of the sound intensity information becomes the magnitude | TIN _P (t) |. Will be done. On the other hand, when the magnitude | TIN _P (t) | is equal to _{or greater than the predetermined value INT TH} , the magnitude information | SIN _P (t) | of the sound intensity information is set to the predetermined value INT _TH .

<Operation>
Next, the operation of the display processing device 100A configured as described above will be described mainly focusing on the display processing executed by the processing control unit 110A.

It is assumed that the sound field specific data has already been acquired and stored in the storage unit 120A.

Upon receiving the display processing start command specifying the frequency f to be analyzed via the input unit 130, the processing control unit 110A starts the display processing. In such display processing, instantaneous sound intensity calculation processing and display control processing are sequentially performed.

<< Instantaneous sound intensity calculation processing >>
In the instantaneous acoustic intensity calculation process, the process control unit 110A first performs a process using the same finite element method as the process of the velocity potential calculation unit 720 described above, and the sound field stored in the storage unit 120A. Based on the specific data, the velocity potential φ (ω) in the sound field space in the steady state frequency region is calculated.

Next, the processing control unit 110A performs the same processing as the processing of the instantaneous particle velocity calculation unit 730 described above to calculate the instantaneous particle velocity u (t). That is, the processing control unit 110A calculates the velocity potential φ (t) by inverse Fourier transforming the velocity potential φ (ω), and then calculates the instantaneous particle velocity u (t) by the equation (1).

Further, the processing control unit 110A performs the same processing as the processing of the instantaneous sound pressure calculation unit 740 described above to calculate the instantaneous sound pressure p (t). That is, the processing control unit 110A calculates the instantaneous sound pressure p (ω) by the above-mentioned equation (2), and then reverse Fourier transforms the instantaneous sound pressure p (ω) to calculate the instantaneous sound pressure p (t). ..

Then, the processing control unit 110A is, performs processing similar to the processing of the instantaneous sound intensity calculation unit 750 described above, to calculate the instantaneous sound intensity TIN _P (t) at each position P on the analysis surface. That is, when calculating the instantaneous sound intensity TIN _P (t), the processing control unit 110A, first, the above-described (3) and (4), convolution instantaneous particle velocity u _sig, it calculates the _P (t) _{, The convolution instantaneous sound pressure p sig, P} (t) is calculated by the above-mentioned equations (3) and (5). Then, the processing control unit 110A is the above-described (6), calculates the instantaneous sound intensity TIN _P (t).

<< Display control processing >>
When the above-mentioned instantaneous sound intensity calculation process is completed, the process control unit 110A starts the display control process.

In such display control processing, as shown in FIG. 6, first, in step S11, the processing control unit 110A relates to the _{sound intensity information SIN P (t) at each position on the analysis surface to be displayed first.} Set the time t ₀ as the time variable t. Subsequently, in step S12, the processing control unit 110A is the instantaneous sound intensity TIN _P (t) is the analysis plane is calculated (sound outputted from the sound source, passenger LND envisaged, the ear position of the LNA It is determined whether or not the value of the instantaneous sound pressure p _{P (t) at each position (on the passing surface) is positive.}

_{Regarding the instantaneous sound pressure p P} (t) in which the determination result in step S12 was positive (step S12: Y), the processing control unit 110A corresponds to the instantaneous sound pressure p _P (t) in step S13. instant acoustic intensity TIN _P (t) which, to add color information of "black". Then, the process proceeds to step S15, which will be described later.

_{On the other hand, regarding the instantaneous sound pressure p P} (t) in which the determination result in step S12 was negative (step S12: N), in step S14, the processing control unit 110A performed the instantaneous sound pressure p _P (t). in an instant acoustic intensity TIN _P (t) corresponding to, to add color information of the "white". Then, the process proceeds to step S15.

Note that the processing of steps S13 and S14 described above generates information on the sound intensity before the size adjustment.

Next, in step S15, the magnitude of the instantaneous sound intensity TIN _P at each position on the analysis plane _{(t) | TIN P (t} ) | ( i.e., the size included in the sound intensity of the information before the size adjustment It is determined whether or not the information) is _{less than the predetermined value INT TH.} The result of determination in step S15 is affirmative (step S15: Y) sound intensity magnitude information before size adjustment | TIN _P (t) | For, in step S16, the processing control unit 110A is, _{The size information | SIN P} (t) | of the sound intensity information for display is determined to be the _{size | TIN P (t) |.} Then, the process proceeds to step S18, which will be described later.

On the other hand, the result of determination in step S15 is negative (step S15: N) size before adjustment of the sound intensity of the size information | TIN _P (t) | For, in step S17, the processing control unit 110A but the size information of the information of sound intensity for display | SIN _P (t) |, and determining a predetermined value INT _TH. Then, the process proceeds to step S18.

Incidentally, the processing of steps S16, S17, and direction information reflecting the direction of the instantaneous sound intensity TIN _P (t), size information is adjusted | with a, and a color information | SIN _P (t) The sound intensity information SIN _P (t) is calculated.

In step S18, the processing control unit 110A generates display data for displaying _{the calculated sound intensity information SIN P (t).} Then, the processing control unit 110A sends the generated display data to the display unit 140. As a result, the sound intensity information SIN _P (t) is displayed on the display unit 140.

Next, in step S19, the processing control unit 110A sets the time variable t to a value obtained by adding the predetermined time Δt to the current value. Here, the predetermined time Δt is suitable for grasping the time change when displaying the time change of the _{sound intensity information SIN P (t) as described later by a moving image.} As described above, it is predetermined based on experiments, simulations, experiences, and the like.

Then, the process returns to step S12. After that, the processes of steps S12 to S19 are repeated. As a result, the time change of the sound intensity information SIN _P (t) is displayed as a moving image.

Note that FIG. 7A shows a display example of the sound intensity information SIN _P (t _{S ) regarding a certain time point t S according} to the first embodiment. Further, FIG. 7B shows an example of displaying the sound intensity information SIN _P (t _{S ) regarding the time point t S} when the color information is not added. As can be seen by comparing FIGS. 7 (A) and 7 (B), the generation of reverse phase sound pressure in both ears of the listener, which could not be discriminated in FIG. 7 (B), is shown in FIG. 7 (A). It can be identified.

Further, FIG. 8A shows an example of displaying the time change of the _{sound intensity information SIN P (t) according to the first embodiment.} Further, FIG. 8B shows an example of displaying the time change of _{the sound intensity information SIN P} (t) when the color information is not added. As can be seen by comparing FIGS. 8 (A) and 8 (B), the state of sound propagation that could not be clearly grasped in FIG. 8 (B) can be clearly grasped in FIG. 8 (A). It has become like.

Further, FIG. 9A shows an example of displaying the time change of the _{sound intensity information SIN P (t) according to the first embodiment.} Further, FIG. 9B shows an example of displaying the time change of _{the sound intensity information SIN P (t) when the size information | SIN P} (t) | is not adjusted. As can be seen by comparing FIGS. 9 (A) and 9 (B), the state of sound propagation, which was difficult to grasp in FIG. 9 (B), is easy to grasp in FIG. 9 (A).

As described above, in the display processing apparatus 100A of the first embodiment, the processing control unit 110A calculates the velocity potential φ (ω) of the sound field space in the frequency domain in the steady state. Subsequently, the processing control unit 110A calculates the instantaneous particle velocity u (t) and the instantaneous sound pressure p (t) based on the velocity potential φ (ω).

Then, the processing control unit 110A is based on the instantaneous particle velocity u (t) and the instantaneous sound pressure p (t), calculates the instantaneous sound intensity TIN _P (t) at each position on the analysis surface. Subsequently, the processing control unit 110A, along with the addition of color information corresponding to the value of the instantaneous sound pressure p _P (t) at each position on the analysis surface instantly sound intensity TIN _P (t), size information is adjusted The display data of the moving image for dynamically displaying the time change of the sound intensity information SIN _{P (t) on the display unit 140 is generated.} Then, the processing control unit 110A sends the generated display data to the display unit 140, and causes the display unit 140 to display _{the time change of the sound intensity information SIN P} (t) by moving images.

Therefore, according to the first embodiment, it is possible to obtain the same effect as the effect in the case of the first embodiment described above.

[Second Example]
First, the first embodiment will be described mainly with reference to FIG.

<Structure>
FIG. 10 shows a schematic configuration of the display processing apparatus 100B according to the second embodiment. The display processing device 100B is one aspect of the display processing device 700B (see FIG. 2) of the second embodiment described above.

As shown in FIG. 10, the display processing device 100B is connected to a sound source unit 210 and an instantaneous particle velocity / instantaneous sound pressure measuring unit 220 arranged outside the display processing device 100B.

Here, the sound source unit 210 is configured to include a speaker. When the sound source unit 210 receives a sound output command that specifies the frequency f to be analyzed sent from the display processing device 100B, the sound source unit 210 outputs the sound of the designated frequency f toward the sound field space to be analyzed. .. That is, the sound source unit 210 functions as the sound source unit 910 in the second embodiment described above.

The above-mentioned instantaneous particle velocity / instantaneous sound pressure measuring unit 220 is configured to include a plurality of microphones. When the instantaneous particle velocity / instantaneous sound pressure measuring unit 220 receives the measurement start command sent from the display processing device 100B, the instantaneous particle velocity at each position of the plurality of microphones is based on the sound collection results of the plurality of microphones. U (t) and instantaneous sound pressure P (t) are calculated. The instantaneous particle velocity U (t) and the instantaneous sound pressure P (t) calculated in this way are sent to the display processing apparatus 100B as measurement results together with the identifiers of the plurality of microphones. That is, the instantaneous particle velocity / instantaneous sound pressure measuring unit 220 fulfills the function of the instantaneous particle velocity / instantaneous sound pressure measuring unit 920 in the above-mentioned second embodiment.

As shown in FIG. 10, the display processing device 100B replaces the processing control unit 110A and the storage unit 120A with the processing control unit 110B and the storage unit 120B as compared with the display processing device 100A of the first embodiment described above. The point that it has is different. Hereinafter, this difference will be mainly focused on and described.

The processing control unit 110B controls the entire display processing device 100B in an integrated manner and performs various processing. The processing control unit 110B will be described later.

The storage unit 120B is configured to include a non-volatile storage element, and stores various information data used in the display processing device 100B. Such information data includes the shape data of the sound field space to be analyzed (design data or measurement data of the sound field space), the wall surface in the sound field space (the body surface of the listener, the outer surface of the seat in the case of a vehicle, etc.). ), Sound absorption coefficient data, sound source data (speaker position data, etc.), and sound field specific data such as medium density are included. Further, the storage unit 120B stores the arrangement position data at the time of measurement of each of the plurality of microphones included in the instantaneous particle velocity / instantaneous sound pressure measuring unit 220 in association with the identifiers of the plurality of microphones.

The processing control unit 110B can access the storage unit 120B. That is, the storage unit 120B serves the function of the storage unit 710B in the above-mentioned first embodiment.

Next, the above-mentioned processing control unit 110B will be described. The processing control unit 110B includes a central processing unit (CPU), a DSP, and peripheral circuits (including a timekeeping mechanism). By executing various programs by the processing control unit 110B, various functions as the display processing device 100B are realized. These functions include the functions of the collection unit 780, the instantaneous sound intensity calculation unit 750, and the display control unit 760 in the second embodiment described above.

Further, the processing control unit 110B uses the communication unit 150 to acquire the above-mentioned sound field specifying data and arrangement position data. Then, the processing control unit 110B stores the acquired sound field specific data arrangement position data in the storage unit 120B.

The program executed by the processing control unit 110B is recorded on a computer-readable recording medium such as a hard disk, flash memory, CD-RM, or DVD, and is loaded and executed from the recording medium. Further, this program may be acquired in the form of being recorded on a portable recording medium such as a CD-ROM or DVD, or may be acquired in the form of distribution via a network such as the Internet. May be good.

<Operation>
Next, the operation of the display processing device 100B configured as described above will be described mainly focusing on the display processing executed by the processing control unit 110B.

It is assumed that the above-mentioned sound field specific data and arrangement position data have already been acquired and stored in the storage unit 120B.

Upon receiving the display processing start command specifying the frequency f to be analyzed via the input unit 130, the processing control unit 110B starts the display processing. In such display processing, instantaneous sound intensity calculation processing and display control processing are sequentially performed.

<< Instantaneous sound intensity calculation processing >>
In the instantaneous sound intensity calculation processing, first, the processing control unit 110B
First, a sound output command specifying the frequency f to be analyzed is sent to the sound source unit 210, and a measurement start command is sent to the instantaneous particle velocity / instantaneous sound pressure measurement unit 220.

As a result, the sound source unit 210 starts outputting the sound of the designated frequency f. Further, the instantaneous particle velocity / instantaneous sound pressure measuring unit 220 starts the measurement. Then, the instantaneous particle velocity / instantaneous sound pressure measuring unit 220 sends the measurement result to the processing control unit 110B.

When receiving the measurement results, the processing control unit 110B is in the manner described above with reference to the positional information data in the storage unit 120B, performs interpolation or the like based on the measurement results, the instantaneous particle velocity u _P (t) And the instantaneous sound pressure p _P (t) is calculated. Subsequently, the processing control unit 110B, as in the case of processing control unit 110A described above, calculates the instantaneous sound intensity TIN _P (t).

<< Display control processing >>
When the above-mentioned instantaneous sound intensity calculation process is completed, the process control unit 110B starts the display control process.

In such display control processing, the processing control unit 110B performs the same processing as in the case of the processing control unit 110A described above. That is, the processing control unit 110B first calculates the sound intensity information SIN _P (t) and displays _{the calculated sound intensity information SIN P} (t), as in the case of the processing control unit 110A. The generation of the display data and the transmission of the generated display data to the display unit 140 are repeated while updating the time variable t. As a result, the time change of the sound intensity information SIN _P (t) is displayed on the display unit 140 as a moving image.

As described above, in the display processing device 100B of the second embodiment, the processing control unit 110B receives the measurement result by the instantaneous particle velocity / instantaneous sound pressure measuring unit 220. Subsequently, the processing control unit 110B is based on the measurement result, moment after calculating the particle velocity u (t) and the instantaneous sound pressure p (t), calculates the instantaneous sound intensity TIN _P (t).

Next, the dynamic processing control unit 110B is, in the same manner as in the processing control unit 110A, after calculating the information of sound intensity SIN _P (t), the time variation of the information sound intensity SIN _P (t) By generating the display data of the moving image to be displayed on the display unit 140 and sending the generated display data to the display unit 140, the display unit 140 is informed of the time change of the _{sound intensity information SIN P (t).} Display by video.

Therefore, according to the second embodiment, the same effect as that of the first embodiment described above can be obtained.

[Modification of Example]
The above-mentioned first embodiment can be modified in the same manner as in the case of the above-mentioned first embodiment. Further, the same modification as in the case of the above-mentioned first embodiment can be performed on the above-mentioned second embodiment.

Note that FIG. 11 shows the relationship between the _{size information | SIN P} (t) | and the size | TIN _P (t) | represented by the above equation (7). There is.

100A, 100B ... Display processing device 110A, 110B ... Processing control unit (calculation unit, display control unit)
140 ... Display unit (display unit)
700A, 700B ... Display processing device 750 ... Instantaneous sound intensity calculation unit (calculation unit)
760 ... Display control unit 770 ... Display unit

Claims (11)

A display processing device that displays information on acoustic intensity that indicates the direction and magnitude of sound propagation in a sound field.
With a calculation unit that calculates the instantaneous acoustic intensity based on the instantaneous particle velocity and instantaneous sound pressure of the sound;
A display control unit for displaying information on the acoustic intensity, in which information corresponding to the value of the instantaneous sound pressure is added to the calculated instantaneous sound intensity , is provided.
The information corresponding to the value of the instantaneous sound pressure is color information, and is
The display control unit
When the value of the instantaneous sound pressure is a non-negative value, the first color is added as the color information.
When the value of the instantaneous sound pressure is a negative value, a second color is added as the color information.
A display processing device characterized by this. A display processing device that displays information on acoustic intensity that indicates the direction and magnitude of sound propagation in a sound field.
With a calculation unit that calculates the instantaneous acoustic intensity based on the instantaneous particle velocity and instantaneous sound pressure of the sound;
A display control unit for displaying information on the acoustic intensity, in which information corresponding to the value of the instantaneous sound pressure is added to the calculated instantaneous sound intensity, is provided.
The sound field is the internal space of the vehicle.
The sound intensity is an acoustic intensity on a surface that is arranged in the vehicle and outputs the sound toward the internal space as a sound source and passes through an assumed occupant's ear position.
A display processing device characterized by this. The display processing device according to claim 1 or 2, wherein the display control unit displays the time change of the information of the acoustic intensity synchronized with the propagation of the sound on the display unit by moving images. A display processing device that displays information on acoustic intensity that indicates the direction and magnitude of sound propagation in a sound field.
With a calculation unit that calculates the instantaneous acoustic intensity based on the instantaneous particle velocity and instantaneous sound pressure of the sound;
A display control unit for displaying information on the acoustic intensity, in which information corresponding to the value of the instantaneous sound pressure is added to the calculated instantaneous sound intensity, is provided.
The change in the magnitude information contained in the sound intensity information according to the increase in the magnitude of the instantaneous acoustic intensity is monotonically non-decreasing.
When displaying the sound intensity information as a symbol, when the length of the symbol corresponding to the magnitude of the instantaneous sound intensity is equal to or longer than a predetermined length, the sound intensity information is displayed as a symbol. Let the length of the symbol be the predetermined length,
A display processing device characterized by this. The symbol is an arrow
In response to the increase in the magnitude of the instantaneous sound intensity, the information of the sound intensity is displayed as an arrow until the length of the arrow for displaying the information of the sound intensity becomes the predetermined length. The rate of change in the length of the arrow is a positive predetermined rate of change,
The display processing apparatus according to claim 4. The symbol is an arrow
The change in the rate of change in the length of the arrow when displaying the information of the acoustic intensity as an arrow in response to the increase in the magnitude of the instantaneous sound intensity is monotonous and non-increasing while maintaining non-negative. The display processing device according to claim 5, wherein the display processing device is characterized by the above. A display processing device that displays information on acoustic intensity that indicates the direction and magnitude of sound propagation in a sound field.
With a calculation unit that calculates acoustic intensity based on the particle velocity and sound pressure of the sound;
A display control unit that generates information on the sound intensity based on the sound intensity and displays the generated sound intensity information on the display unit;
In the display control unit, the change in the magnitude information included in the sound intensity information in accordance with the increase in the calculated acoustic intensity magnitude is monotonous and non-decreasing, and the sound intensity is the same. When the length of the symbol corresponding to the calculated magnitude of the sound intensity is longer than the predetermined length in displaying the information as a symbol, the length of the symbol when displaying the information of the sound intensity as a symbol is used. The predetermined length is set to be displayed on the display unit.
A display processing device characterized by this. The symbol is an arrow
The sound intensity is an instantaneous sound intensity, and is
The particle velocity is an instantaneous particle velocity, and is
The sound pressure is an instantaneous sound pressure.
The display processing apparatus according to claim 7. It is a display processing method used in a display processing device having a calculation unit and a display control unit; and displaying information on acoustic intensity indicating the propagation direction and magnitude of sound in a sound field.
With a calculation step in which the calculation unit calculates the instantaneous acoustic intensity based on the instantaneous particle velocity and the instantaneous sound pressure of the sound.
The display control unit comprises a display control step of displaying information on the acoustic intensity on the display unit by adding information corresponding to the value of the instantaneous sound pressure to the calculated instantaneous sound intensity.
The information corresponding to the value of the instantaneous sound pressure is color information, and is

The display control unit is used in the display control process.
When the value of the instantaneous sound pressure is a non-negative value, the first color is added as the color information.
When the value of the instantaneous sound pressure is a negative value, a second color is added as the color information.
A display processing method characterized by the fact that. A display processing program according to claim 9, wherein a computer included in the display processing apparatus is made to execute the display processing method according to claim 9. A recording medium, wherein the display processing program according to claim 10 is recorded so as to be readable by a computer included in the display processing apparatus.

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