JP3083296B2 - In-vehicle sound reproducer - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted sound reproducing apparatus, and more particularly, to a stereo reproduction which can be suitably used by being mounted on an automobile such as a passenger car. The present invention relates to a vehicle-mounted acoustic reproduction device of the type.

[Prior Art] FIG. 11 is a schematic configuration diagram showing a conventional vehicle-mounted sound reproducing apparatus that is already commercially available as a product.
In FIG. 11, the CD player (1) is connected to first and second equalizer circuits (2a) and (2b). First
The equalizer circuit (2a) is connected to the first and third attenuator circuits (3a) and (3c), and the second equalizer circuit (2b) is connected to the second and fourth attenuator circuits (3
b) and (3d) are connected. The balance fader control switch (4) is connected to the first to fourth attenuator circuits (3a) to (3d). Further, the first to fourth attenuator circuits (3a) to
The first to fourth amplifier circuits (5a) to (5d) are connected to the subsequent stage of (3d), respectively. At the four corners of the vehicle body (6), a right front speaker (7R), a left front speaker (7L), a right rear speaker (8R), and a left rear speaker (8L) are arranged, respectively. These are individually connected to the corresponding amplifier circuits.

The conventional vehicle-mounted sound reproducing device is configured as described above, and its operation will be described below. Now, assuming that the CD player (1) is playing appropriate music, music signals corresponding to the music are output by the first and second equalizer circuits (2a) and (2b) according to the taste of the vehicle occupant. After the frequency characteristics are changed, the signals are added to the first to fourth attenuator circuits (3a) to (3d).
These first to fourth attenuator circuits (3a) to (3a)
In d), the balance fader control switch (4) adjusts the level ratio of the electric signal input to the corresponding speaker.
Therefore, the vehicle occupant can change the level of the electric signal input to each of the speakers by operating the balance fader control switch (4). The electric signal whose level ratio is appropriately adjusted by the balance fader control switch (4) is amplified by the corresponding first to fourth amplifier circuits (5a) to (5d), and then amplified. Corresponding right front speaker (7R), left front speaker (7
L), a sound wave corresponding to a desired music signal is radiated into the vehicle interior in addition to the right rear speaker (8R) and the left rear speaker (8L).

Here, what can be operated by the vehicle occupant are the balance fader control switch (4) and the first and second equalizer circuits (2a) and (2b). By appropriately adjusting these, The sound quality in the seat of the vehicle occupant was made suitable. By the way, a vehicle usually has a plurality of seats, and the above-mentioned adjustment has to be performed for each seat.

In this conventional device, the level difference between the left and right speakers at the driver's seat of the vehicle can be corrected or adjusted by operating the balance fader control switch (4).
Since it is impossible to correct or adjust the time difference of the loudspeaker, the localization is incomplete.

Further, the first and second equalizer circuits (2a) and (2b) are only used for two channels, that is, the left channel and the right channel. Since the equalization characteristics are the same, for example, when an equalization process is performed so that the frequency characteristics of the front speaker become flat, the frequency characteristics of the rear speaker may not be optimized.

In addition, the phase difference between sound waves radiated from the front and rear speakers in the vehicle cabin may cause a significant sound pressure distribution in the low bass range of 60 to 300 Hz. For this reason, the vehicle driver's seat slightly ahead of the center of the vehicle interior becomes a dip in the sound pressure distribution, and the sound pressure in the low sound range decreases.
In such a conventional device, the sound pressure ratio of the loudspeakers before and after the vehicle can be changed, but the dip on the sound pressure distribution is improved because the phase difference of the sound waves emitted from the loudspeakers cannot be changed. It is impossible to do.

In the rear seats of the vehicle, the distance between the left and right rear speakers (8L) and (8R) is extremely small compared to the left and right front speakers (7L) and (7R). -Even if the level of the left and right rear speakers (8L) and (8R) is reduced by using the switch (4), it is difficult to completely localize the front due to a known preceding sound effect. .

Further, in order to flatten the frequency characteristics of the sound wave at the position of the occupant's head in the rear seat of the vehicle, the first and second equalizer circuits (2a) and (2b) increase the high frequency range when the high frequencies are enhanced. -The high frequency range of the speakers (8L) and (8R) will be enhanced, and this will give the passengers in the rear seats a harsh and unpleasant impression.

[Problems to be Solved by the Invention] Since the conventional vehicle-mounted sound reproducing apparatus is configured and operates as described above, the sound quality must be adjusted for each seat occupied by the occupant. Since it is impossible to perform this adjustment sufficiently, there has been a problem that the passenger has a harsh and unpleasant impression.

The present invention has been made in order to solve the above-described problems, and not only enables adjustment of the reproduction level of each speaker, but also enables adjustment of the frequency characteristic of each speaker individually. Yes, it is possible to correct the time difference and phase difference related to the sound wave from the speaker, and by operating the selection switch corresponding to the seat occupied by the occupant, the optimally adjusted reproduction sound can be promptly obtained. It is an object of the present invention to obtain a vehicle-mounted sound reproducing device that can be obtained.

[Means for Solving the Problems] A vehicle-mounted sound reproducing apparatus according to the present invention includes: a front speaker disposed in a front part of a vehicle interior, a rear speaker disposed in a rear part of the vehicle interior, and a desired position in the vehicle interior. Selecting means, selecting means for changing a frequency characteristic of an electric signal inputted to the front speaker and the rear speaker,
Attenuating means for changing the amount of attenuation of the electric signal; delay means for changing a delay time of the electric signal within a range in which a sound signal obtained from the electric signal is not reflected in the cabin; and a plurality of positions in the cabin. A storage means for storing a set of change amounts corresponding to each of the positions, the change amount of the equalizing means, the change amount of the attenuating means, and the change amount of the delay means corresponding to each set; Extracting means for extracting a set change amount corresponding to the position selected by the selection means from the storage means, based on the set change amount extracted by the extractor, the equalizing means, the attenuation means, the delay means, Control means for controlling the front seat when the selecting means performs an operation corresponding to the front seat, based on the set change amount corresponding to the front seat. The control by the delay means and the control by the equalizing means are performed on the audio signal input to the front speaker, and the control by the attenuating means is performed on the audio signal input to the rear speaker. Is performed, based on the set change amount corresponding to the rear seat, the control of the equalizing stage is performed on the input audio signal to the front speaker, and the delay is performed on the input audio signal to the rear speaker. The control by means and the control by the damping means are performed.

[Operation] In the present invention, when a seat position in the vehicle interior is selected, the extracting means extracts a set change amount stored in the storage means, and based on the set change amount, the control means controls the delay means, the equalizing means and By controlling the attenuation means, desired stereo reproduction is performed.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a vehicle-mounted sound reproducing apparatus according to an embodiment of the present invention. In FIG. 1, the CD
One output of the player (1) is connected to the first and third delay circuits (10a) and (10c), and the other output is connected to the second and fourth delay circuits (10b). ,(Ten
d) is connected. Here, for example, focusing on the first delay circuit (10a), in the subsequent stage, in order of the first tone circuit (11a), the first attenuator circuit (12a), and the first amplifier circuit (5a). In series, and
A left front speaker (7L) is connected to a stage subsequent to the first amplifier circuit (5a). Note that the second to fourth
The connection relationship at the subsequent stage of the delay circuits (10b) to (10d) is the same as in the case of the first delay circuit (10a), and further description will be omitted. (9) is a position selection switch section, which is provided with a plurality of selection switches (A1) to (A3) as selection means. 4 delay circuits (10a) to (10d), first to fourth tone circuits (11a) to (11d), and first to fourth attenuator circuits (12a) to (12d). ing. At the four corners of the body (6), the right front speaker (7R) and the left front speaker
A speaker (7L), a right rear speaker (8R), and a left rear speaker (8L) are arranged, and these are individually connected to corresponding amplifier circuits.

Next, the operation of the embodiment of the present invention shown in FIG. 1 will be described. Now, assuming that a desired sound is reproduced by the CD player (1), the reproduced stereo signals of the left and right two channels are supplied to the left and right front speakers (7).
L), (7R) drive signals and left and right rear speakers (8
L) and (8R) after being branched into driving signals, the first to fourth delay circuits (10a) to (10b) respectively.
After a predetermined delay is given, equalization processing is performed by the first to fourth tone circuits (11a) to (11d). Next, predetermined attenuation is performed in the first to fourth attenuator circuits (12a) to (12d), and power amplification is performed in the first to fourth amplifier circuits (5a) to (5d). Left and right front speakers (7
L), (7R) and left and right rear speakers (8L), (8R)
A sound wave is emitted from.

The plurality of selection switches (A1) to (A3) provided in the position selection switch section (9) have a function of selecting and specifying a seat in the vehicle. Now, when the occupant presses a required one of the selection switches (A1) to (A3), a corresponding control signal is generated, and a storage means (shown in the drawing) provided in the position selection switch section (9). ), An extracting means (not shown) provided in the position selection switch section (9) selects and sets a required delay amount, equalizing characteristic, attenuation ratio and the like for each speaker.

Here, for example, when the selection switch (A1) is pressed,
The case where the driver's seat is selected will be described. Generally, it is impossible to attach a large baffle plate to the left and right front speakers (7L) and (7R).
The treble range is often attenuated because the level in the low range tends to be insufficient, and the center axis of these speakers is displaced from the driver's seat. Therefore, by using a tone circuit, the left and right front speakers (7L),
The frequency characteristics of the left and right front speakers (7L) and (7R) can be made flat by attenuating the midrange of (7R) and relatively raising the low range and high range.

FIG. 2 is a graph illustrating the adjustment of the frequency characteristic in the above embodiment. Here, the total length of the cabin is
A graph is shown using a 2.6 m passenger car as an example. In FIG. 2, the horizontal axis indicates frequency (Hz), and the vertical axis indicates level (dB). Now, adjust the level in the midrange to 400 Hz and 5 kHz.
When z is set to -6 dB and at 1.5 kHz to -10 dB, it is recognized that a substantially flat frequency characteristic is realized as shown by a dotted line.

The right front speaker (7R) is located near the driver's seat, but the left front speaker (7L) is located remotely, so that sound waves radiated from these two speakers are A time difference occurs before the vehicle arrives at the driver's seat, and the left and right localization deteriorates. In a normal car, the difference in distance from the left and right front speakers (7L) and (7R) is about 30 to about 60 cm, and the time difference is
Since it is about 1 msec, the right front speaker (7
R), the corresponding delay circuit
By giving a delay of about msec, left and right localization can be improved.

In a normal listening room, since the sound pressure of the rear sound from behind the listener is lower than the sound pressure of the front from the front, the left and right rear speakers can be set by using the corresponding attenuator circuits. By attenuating the volume of (8L) and (8R), a more natural listening state is realized.
In the example of FIG. 2, the sound pressure of the left and right rear speakers (8L) and (8R) is set to 3 dB by the corresponding attenuator circuit.
When the sound pressure was lowered, the sound pressure of the rear sound became lower than the sound pressure of the front sound.

Next, the case where the occupant in the rear seat presses the selection switch (A2) in the position selection switch section (9) to select the rear seat will be described. In the rear seats, the left and right rear speakers (8L) and (8R) located near the occupant's head have extremely high volumes, and hear sounds from other left and right front speakers (7L) and (7R). Is difficult. As a countermeasure, in the example of FIG. 2, the sound pressure of the left and right rear speakers (8L) and (8R) is reduced by 10 dB or more by the corresponding attenuator circuit.
The sound pressure of the left and right front speakers (7L) and (7R) is reduced.

If the mid-range and high-range sound pressures are large, use the corresponding tone circuit to set the left and right rear speakers (8L),
(8R) It is only necessary to attenuate the middle range and the high range. On the other hand, the left and right front speakers (7L) and (7R) have insufficient sound pressures in the low range and the high range for the reasons described above. Generally, between the front speakers and the rear seats, interior materials having high sound absorption properties in the middle and treble ranges are used. Lack of sound pressure becomes severe. Therefore, in the example of FIG.
By attenuating in the middle range, such as -6 dB at 1 kHz and -8 dB at 1 kHz, equalization processing is performed such that the bass range and the treble range rise relatively as compared with the driver's seat. In addition, the delay circuit of the left and right rear speakers (8L) and (8R) causes the sound signal to propagate in the vehicle compartment in the longitudinal direction with respect to the electric signals in the left and right rear speakers (8L) and (8R). If a delay within the sound is given, the sound image can be localized forward by utilizing a known preceding sound effect. For example, when the speed of sound is 340 m / sec, the propagation time of sound waves in a passenger car having a total length of a passenger compartment of 2.6 m is within 8 msec.

FIG. 3 and FIG. 4 are illustrations of various characteristics in the above embodiment. FIG. 3 (A) shows a table as an example of the correspondence between the time delay and the damping ratio as a first table, and FIG. 3 (B) shows a table in FIG. FIG. 3 is a diagram illustrating a table as an example of an equalizing characteristic; FIG. 4 is a graph corresponding to FIG. 3 (B).

FIG. 5 to FIG. 8 are schematic structural views each showing a necessary part of the above embodiment. First, FIG. 5 illustrates a delay circuit. The delay circuit exemplified here is composed of, for example, a delay element such as a BBD (Bucket Brigade Device), and a time selected by a position selection switch unit for selecting a seat for which sound quality is to be optimized. A typical delay is applied to the electric signal to each speaker. Next, FIG. 6 illustrates a tone circuit. The tone circuit illustrated here is
It has several tone function units having different equalizing characteristics, and according to the equalizing characteristics preset for each seat selected for each position selection switch unit,
Equalization processing of an electric signal for each speaker is performed. FIG. 7 illustrates an attenuator circuit. In the attenuator circuit exemplified here, an electric signal attenuation process for each speaker is performed at a predetermined attenuation ratio for each seat selected by the position selection switch unit. FIG. 8 illustrates a position selection switch unit. The position selection switch section exemplified here functions as a control circuit, and generates a control signal corresponding to the selection switch pressed by the occupant of the vehicle, and outputs a delay circuit, a tone circuit, and a tone circuit for each speaker. In the attenuator circuit, a preset time delay, equalizing characteristic, and attenuation ratio are selected.

In these FIGS. 5 to 8, L and R
Are respectively left and right stereo signals, D1 to D4 are delay elements having different delay amounts, for example, BBD, and S1 to S9 are relay switches, respectively.
The control signals C1 to C9 are turned on when they are in the LOW state, and T1 to T6 are equalizer circuits composed of an equalizing IC, for example, used for a graphic equalizer for car audio, and R1 to R6. Is the predetermined resistance, and
(A1) to (A3) are selection switches for selecting a seat. In FIGS. 5 to 7, the left and right front speakers (7L) and (7R) are illustrated, respectively. ) And (8R) can be provided with a similar configuration.

Now, in FIG. 8, assuming that the selection switch (A1) of the position selection switch section (9) is closed, the control signals C1, C4 and C7 become LOW accordingly. For this reason, in the delay circuit of FIG. 5, the relay switch (S1) is turned on, and
D1 delay is given, and the right channel side
D2 delay is given. In the tone circuit shown in FIG. 6, the relay switch (S4) is turned on, and the equalizing process of T1 on the left channel side is performed, and the equalizing process of T2 on the right channel side is performed. You. Further, in the attenuator circuit shown in FIG. 7, the relay switch (S7) is turned ON, and an electric signal which is not attenuated in any of the left and right channels is applied.

On the other hand, assuming that the selection switch (A2) of the position selection switch section (9) in FIG. 8 is closed, the control signals C3, C5 and C8 are set to LO in accordance with this.
W. Therefore, in the attenuator circuit shown in FIG. 7, the relay switch (S8) is turned on, and the electric signals of the left and right channels are attenuated with the following resistance ratios. That is, the left channel: (R2 + R3) / (R1 + R2 + R3) The right channel: (R5 + R6) / (R4 + R5 + R6) Here, the problems pointed out earlier as problems in the conventional example are radiated from speakers arranged in front and behind the vehicle. The sound pressure at the driver's seat of the vehicle is attenuated due to the phase difference of the sound waves. However, according to the embodiment of the present invention, the left and right front speakers (7L),
Since a required time delay can be given to the drive signal to (7R), the phase difference between the speakers arranged before and after the vehicle can be equivalently set. Now, the drive signal on the front speaker side is 2.4mse
Assuming that a delay of c is given, for example, at a frequency of 100 Hz, the phase difference between the front and rear speakers is set to 86 °, and this is equivalent to the case where radiation is performed. For this reason, by changing the sound pressure distribution in the vehicle interior in the band near 100 Hz, attenuation of the sound pressure in the driver's seat can be reliably prevented.

FIG. 9 shows a sound pressure frequency characteristic diagram at the driver's seat of a passenger car having a total length of 2.6 m, and the vertical axis represents a sound pressure level (dB).
And the frequency (Hz) is taken on the horizontal axis.
In this example, four loudspeakers are arranged, one at the left and right of the front dash and one at the left and right of the rear tray, and the sound pressure of the speakers arranged at the rear is reduced by 3 dB. FIG. 2 shows a sound pressure frequency characteristic diagram at the driver's seat when the vehicle is driven in the vertical direction. In FIG. 9, curve (91) is a characteristic diagram when there is no time delay, and curves (92) and (93) are when there are time delays of 1.1 msec and 2.4 msec, respectively. FIG. By providing such a time delay, an increase in sound pressure at 40 to 150 Hz is recognized.

Fig. 10 shows the sound pressure frequency characteristics at the rear seats of a passenger car with a total length of 2.6m, and the vertical axis shows the sound pressure level (dB).
And the frequency (Hz) is taken on the horizontal axis.
In this example, four loudspeakers are arranged, one at the left and right of the front dash and one at the left and right of the rear tray, and the sound pressure of the speakers arranged at the rear is reduced by 10 dB. FIG. 2 shows a sound pressure frequency characteristic diagram at the rear seat when the vehicle is driven. In FIG. 10, curve (101) is a characteristic diagram when there is no time delay, and curves (102) and (103) are when there are time delays of 2.4 msec and 4.4 msec, respectively. FIG. First, looking at curve (101),
It is recognized that a large dip is generated around 50 Hz. Also, looking at curve (102), it can be seen that a rise near 150 Hz occurs, resulting in a significant improvement over the dip.

Generally, the phase of a delay element such as a BBD changes in proportion to the frequency. However, in a low tone range around 100 Hz, the phase can be considered to be substantially constant. From this, as described above, the dip can be improved in the low frequency range. Further, in a band above a band considered to be a fixed phase, a dip may be generated because there is a frequency at which the phase difference between the sound waves before and after the band is reversed. The generation of such a dip corresponds to 300 Hz in FIG. 9 or 250 Hz in FIG.
Although recognized near Hz, the magnitude of the dip and the frequency generated by the dip differ depending on the magnitude of the temporal delay and the drive level for each speaker. By changing the magnitude of the temporal delay, the magnitude of the dip in the low frequency range can be changed.

The magnitude of the temporal delay between the speakers arranged before and after in the cabin is determined in front of (or behind) the cabin.
As long as the sound wave radiated from the vehicle is within the time required to reach the rear (or front) of the passenger compartment, the sound is radiated from the front speakers and the rear speakers at any point from the front to the rear in the passenger compartment. The phases of the sound waves can be in phase or out of phase. Thus, it is possible to adjust the sound pressure distribution in the cabin, and further, it is possible to change the dip in the low frequency range.

The total length of the cabin of an automobile is usually at most less than 4 m, and it takes about 11.8 msec for a sound wave to propagate through this length. Therefore, the magnitude of the temporal delay in the speakers arranged in front and rear in the vehicle compartment may be about 1 to 12 msec. Then, within such a range of the time delay, the sound pressure in the band to be improved is remarkably increased, and the dip in the other bands is reduced. The magnitude can be set by measuring the sound pressure frequency characteristics in the low frequency range. The measurement of the sound pressure frequency characteristic can be easily performed by, for example, sweeping a known sine wave or operating a 1/3 oct. Analyzer.

In the embodiment of the present invention shown in FIG.
Due to this temporal delay, the sound image is localized forward based on the preceding sound effect in the middle and high ranges. By adopting the configuration as shown in FIG. 1, a predetermined one of a predetermined time delay magnitude, an equalization characteristic, and an attenuation ratio is set in accordance with each selection switch of the position selection switch section. Select
The reproduced sound quality can be optimized.

[Effects of the Invention] As described above, the vehicle-mounted sound reproducing device according to the present invention includes: a front speaker disposed in a front part of a vehicle compartment;
A rear speaker disposed at the rear of the vehicle interior, a selection unit for selecting a desired position in the vehicle interior, an equalizing unit for changing a frequency characteristic of an electric signal input to the front speaker and the rear speaker, and an attenuation of the electric signal Attenuating means for changing the amount, delay means for changing the delay time of the electric signal within a range in which a sound signal obtained from the electric signal is not reflected in the cabin, a plurality of positions in the cabin, and each of these positions The storage means storing the change amount of the equalizing means, the change amount of the attenuating means, and the change amount of the delay means corresponding to a set of change amounts respectively corresponding to the set, and is selected by the selection means. Extraction means for extracting a set change amount corresponding to the set position from the storage means, based on the set change amount extracted by the extraction means, A control means for controlling the equalizing means, the attenuating means, and the delay means, wherein the control hand performs an operation corresponding to the front seat by the selecting means, based on the set change amount corresponding to the front seat. The control by the delay means and the control by the equalizing means are performed on the input audio signal to the front speaker, and the control by the attenuating means is performed on the input audio signal to the rear speaker. When the operation is performed, based on the set of change amounts corresponding to the rear seat, the input audio signal to the front speaker is controlled by the equalization stage, and the input audio signal to the rear speaker is The control by the delay means and the control by the damping means are performed, and when a seat position in the vehicle interior is selected, based on the control of the control means, Detecting means is removed a set change amount stored in advance in the storage means, the delay means,
A desired sound field is formed by controlling the equalizing means and the attenuating means collectively, and reproduction is performed. That is, the present invention
With respect to the electric signal applied to the individual speaker, the time delay, the equalizing characteristic, and the attenuation ratio can be selectively set for each seat in the vehicle interior, and according to each selection of the selection means, By selecting a predetermined one from preset time delay magnitudes, equalizing characteristics, and attenuation ratios, the reproduced sound quality can be optimized. Thus, music and the like reproduced in stereo can be enjoyed with the sound quality adjusted optimally. Further, according to the present invention, when sound waves are output from a speaker, it is possible to prevent the frequency characteristics from dropping deeply, and to form an optimal sound field corresponding to a desired position. Further, according to the present invention, sound field control can be quickly performed according to a desired seat position, and the processing speed of the apparatus is improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a vehicle-mounted sound reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a graph for illustrating adjustment of frequency characteristics in the above embodiment, and FIG. FIG. 4 is a table illustrating various characteristics in the embodiment, FIG. 4 is a graph illustrating specific characteristics in the embodiment, FIG. 5 is a diagram illustrating a delay circuit in the embodiment, FIG. FIG. 7 is a view showing an example of a tone circuit in the above embodiment, FIG. 7 is a view showing an example of an attenuator circuit in the above embodiment, FIG. 8 is a view showing an example of a position selection switch section in the above embodiment, FIG. FIG. 11 is a diagram showing a sound pressure frequency characteristic at a rear seat of a passenger car for explaining the operation of the above embodiment. FIG. 11 is a schematic configuration diagram showing a conventional vehicle-mounted sound reproducing device. (1) is a CD player, (10a) to (10d) are first to fourth delay circuits, and (11a) to (11d) are first to fourth delay circuits.
(12a) to (12d) are first to fourth attenuator circuits, (5a) to (5d) are first to fourth amplifier circuits (5a), (9) is a position selection switch section,
(7R) is the right front speaker, (7L) is the left front speaker
Speaker, (8R) is right rear speaker, (8L) is left rear speaker. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masahiro Hibino 8-1-1, Tsukaguchihonmachi, Amagasaki-shi, Hyogo Mitsubishi Electric Corporation Applied Equipment Research Laboratory (56) References JP-A-62-291300 (JP, A) JP-A-59-225700 (JP, A)

Claims (1)

(57) [Claims] 1. A front speaker arranged in a front part of a vehicle interior, a rear speaker arranged in a rear part of a vehicle interior, a selection means for selecting a desired position in the vehicle interior, and a signal inputted to the front speaker and the rear speaker. Equalizing means for changing the frequency characteristic of the electric signal, attenuating means for changing the amount of attenuation of the electric signal, and changing the delay time of the electric signal within a range in which a sound signal obtained from the electric signal is not reflected in the cabin. Delay means for causing a plurality of positions in the vehicle cabin, and a set change amount corresponding to each of the positions, the change amount of the equalizing means, the change amount of the attenuation means, and the change amount of the delay means. And a storage unit that stores a set change amount corresponding to the position selected by the selection unit from the storage unit. Means for controlling the equalizing means, the attenuating means, and the delaying means based on the set change amount extracted by the extracting means, wherein the controlling means corresponds to the front seat by the selecting means. When the operation is performed, the control by the delay unit and the control by the equalizing unit are performed on the input audio signal to the front speaker based on the set change amount corresponding to the front seat, and the input to the rear speaker is performed. When the sound signal is controlled by the above-mentioned attenuation means, and when the operation corresponding to the rear seat is performed,
On the basis of the set of change amounts corresponding to the rear seats, control is performed on the input audio signal to the front speaker by the equalizing stage, and control is performed on the input audio signal to the rear speaker by the delay means. A vehicle-mounted sound reproducing apparatus, wherein control is performed by damping means.