JP4172483B2 - Speaker device - Google Patents

Description

  The present invention relates to an array speaker constituted by a plurality of speakers.

  An array speaker in which a plurality of speakers are arranged in a row is known (see Patent Document 1). The array speaker becomes a linear sound source when outputting sound, and when the speakers are arranged in the vertical direction, there is no emission of unnecessary sound in the vertical direction, so it is possible to suppress room reverberation and reflections. , Can make clear voices farther away. In addition, the array speaker has a small distance attenuation, and the volume difference between the position close to the speaker and the position far from the speaker is reduced. Therefore, even when used in a large place with a depth such as a large gymnasium or various halls, it is possible to deliver sound far away.

  However, there are the following problems when using it in a large place where the audience seats are stepped like an arena or a concert hall. For example, if an array speaker is installed at the upper left and right of the stage so that sound can reach the back row audience seats, the vertical direction angle is narrow, so the audience seats in the front row, that is, close to the speakers On the other hand, if the array speaker is installed at the same height as the stage so that the sound can reach the spectators in the front row, the sound cannot reach the seats in the back row.

  In Patent Document 1, in order to allow sound to reach the staircase-like seats, an array speaker having the same height as the height from the bottom seat to the top seat is installed, or the stage and the last row are arranged. It is disclosed that an array speaker is tilted in accordance with an angle formed by a straight line connecting a passenger seat and a horizontal plane. However, in large halls such as concert halls, there are halls with second- and third-floor seats, and if you try to install an array speaker for such a seat, the height of the speakers will be very high, Assembly becomes difficult. Even if the array speaker is tilted, since the directivity angle in the vertical direction is narrow, it is difficult to deliver sound to all the passenger seats in a hall or the like having a second-floor seat or a third-floor seat.

As a technique for solving such a problem, for example, Non-Patent Document 1 discloses a technique for arranging speakers such that a row of speakers draws an arc when viewed from the side. In the array speaker of this aspect, the lower speaker is directed to the front row passenger seat, and the upper speaker is directed to the rear row customer property. The sound can be delivered to the audience in the second floor and the third floor.
JP 2002-199484 A By David Junness (Japanese version production: Acoustic Special Equipment Co., Ltd.), “Technical Explanation of Touring Line Array”, [online], searched on May 16, 2005, Internet <URL; http: // www. otk.co.jp/history/tech/gunness.pdf>

  By the way, in an array speaker in which speakers are arranged in a line, the horizontal directivity angle is constant from the upper speaker to the lower speaker. If the directivity angle is set so as to reach the front row passenger seats, the directivity angle becomes too wide in the rear row passenger seats, and the sound is reflected on the wall to reduce the clarity of the sound. On the other hand, when the directivity angle is adjusted according to the passenger seats in the rear row, the directivity angle becomes narrower in the front row passenger seats, and sound cannot be delivered to the left and right front seats. Non-Patent Document 1 discloses a technique related to sound emission in the vertical direction, but does not refer to sound emission in the horizontal direction. In the array speaker disclosed in Non-Patent Document 1, The sound cannot be properly delivered to the front row and back row audiences.

  The present invention has been made under the above-described background, and an object thereof is to provide an array speaker suitable for delivering sound to an area having a difference in depth and height.

In order to solve the above-described problem, the present invention is a speaker device that is provided above a stage in a hall that includes a plurality of speakers on the same plane and whose position of a passenger seat increases as the distance from the stage increases. A planar portion in which a plurality of speakers are arranged in a plane in the horizontal direction; and a linear portion in which a plurality of speakers are arranged in a line in the vertical direction, and vertically below the planar portion. As the linear portions are connected and from the upper side to the lower side in the vertical direction, the number of speakers arranged in the horizontal direction decreases, and the directivity directions of the plurality of speakers are substantially parallel to the horizontal direction. A speaker device is provided.

In a preferred embodiment of the speaker apparatus, comprising: a plurality adjacent symmetrically speaker column speaker are arrayed along the lead straight direction, number of speakers in each loudspeaker rows arranged in the symmetrical, the It may decrease as it goes from the central column in the left-right direction of the speaker device to the left-right column, and the upper ends of the speaker columns may be aligned.
In a preferred aspect of the speaker device, the plurality of speakers has a hexagonal columnar speaker box for each set of one or a plurality of speakers, and the directions of the central axes of the plurality of hexagonal columnar speaker boxes are substantially parallel. You may make it become.
In a preferred aspect of the speaker device, the directivity direction of the speaker at the lower end of the linear portion may be inclined downward with respect to the horizontal direction.
In a preferred aspect of the speaker device, the direction of sound from the speaker of the linear portion may be inclined downward with respect to the horizontal direction.

  ADVANTAGE OF THE INVENTION According to this invention, a sound can be delivered appropriately also to the area | region with a depth and height difference.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1B is a front view of the right half of the array speaker 1 according to the embodiment of the present invention, and FIG. 1A is a side view of the array speaker 1 according to the embodiment of the present invention. The speaker module 10 constituting the array speaker 1 includes a box-shaped speaker box 11, a woofer 12 that is a speaker for low-frequency range reproduction, and a tweeter 13 that is a speaker for high-frequency range reproduction.

  In the array speaker 1, as shown in FIG. 1, each of the plurality of speaker modules 10 is arranged in a vertical (vertical) direction and a horizontal direction so that the directivity directions of the speaker modules are substantially parallel. . Specifically, a first line L1 in which n1 speaker modules 10 are arranged in the vertical direction, a second line L2 in which n2 speaker modules 10 are arranged in the vertical direction, and n3 speaker modules 10 in the vertical direction. Are arranged side by side in the horizontal direction (n1> n2> n3> n4: n1 to n4 are integers). .

In the array speaker 1, 10 speaker modules are arranged so that the upper ends of the respective lines are aligned, the second line L2 is adjacent to the first line L1, the third line L3 is adjacent to the second line L2, and the The speaker modules 10 are arranged next to the third line L3 as a fourth line L4. Since the number of speaker modules 10 constituting each line is different, the number of speaker modules 10 that are combined in the horizontal direction is larger as it is higher in the vertical (vertical) direction, and the speaker module 10 that is combined in the horizontal direction is lower as it is lower. The speaker modules 10 are arranged so that the number of
As described above, when the speaker modules 10 are arranged so that the number of the speaker modules 10 arranged in the horizontal direction increases as it goes upward in the vertical (vertical) direction, the inside of the first area A1 shown in FIG. In FIG. 2, a surface sound source is formed because the speaker modules 10 are arranged in a rectangular shape, and in the second area, a line sound source is formed because the speaker modules 10 are arranged in a generally linear shape in the vertical direction. A point sound source is formed.

The sound radiated from the point sound source has a distance attenuation as compared with the line sound source, but the sound is radiated spherically from the sound source, so that the directivity angles in the vertical direction and the horizontal direction are wide.
This directivity angle will be described with reference to FIGS. FIG. 2 is an example of a plan view of the concert hall, and FIG. 3 is a view of the concert hall illustrated in FIG. 2 as viewed from the side of the stage. In FIGS. 2 and 3, the distance in the horizontal direction of the stage is 20 m, the distance from the left and right of the audience seat farthest from the stage is 30 m, and the distance from the farthest seat to the stage is 30 m. A case is assumed in which the height difference from a distant seat to a seat near the stage is 14 m.
When the array speaker 1 having a point sound source is installed on the left and right sides of the stage as shown in FIG. 2, the sound emitted from the point sound source has a wide directivity angle in the horizontal direction, so that it is widely indicated by a two-dot chain line on the left and right. Radiated to the area B1. In addition, as shown in FIG. 3, when the array speaker 1 is installed above the stage, the sound emitted from the point sound source located below the array speaker 1 has a wide directivity angle in the vertical direction. Widely radiated and radiated to area C1 near the stage.

  In addition, the sound emitted from the linear sound source has a narrower directivity angle in the vertical direction than that of the point sound source in the vertical direction. Also, since the horizontal direction is slightly wider than the point sound source in the horizontal direction, the horizontal directivity angle of the line sound source is slightly narrower than that of the point sound source. For this reason, when the array speaker 1 having a linear sound source is installed on the left and right of the stage as shown in FIG. 2, the sound radiated from the linear sound source is radiated with a slightly narrower directivity angle in the horizontal direction than the point sound source. Radiated to area B2 indicated by a chain line. As shown in FIG. 3, when the array speaker 1 is installed above the stage, the line sound source is located above the point sound source and the vertical directivity angle is narrow. The area C2 is radiated to the seats in the back row from the seats in the area C1.

  Further, the sound radiated from the surface sound source has little distance attenuation in both the vertical and horizontal directions, and the directivity angles in the horizontal and vertical directions are narrow. For this reason, when the array speakers 1 having a surface sound source are installed on the left and right sides of the stage as shown in FIG. 2, the sound radiated from the surface sound source is radiated with a narrower directivity angle in the horizontal direction than the line sound source, Radiated to the indicated area B3. Also, as shown in FIG. 3, when the array speaker 1 is installed above the stage, the surface sound source is located above the line sound source and the vertical directivity angle is narrow. , The area C3, that is, radiated to the passenger seat in the back row from the passenger seat in the area C2.

  In addition, the vertical and horizontal directivity angles of the sound radiated from the point sound source, the line sound source, and the surface sound source constitute the size of the hole, the position of the array speaker 1, the number of array speakers 1, and the array speaker 1. Depending on the arrangement of the speaker modules to be used, the vertical direction angle of the point sound source is about 60 to 90 degrees, and the horizontal direction angle is about 90 to 120 degrees. In addition, the directivity angle in the vertical direction of the line sound source and the surface sound source is approximately 15 degrees to 30 degrees, and the directivity angle in the horizontal direction is approximately 30 degrees to 60 degrees. 2 and 3, the horizontal directivity angle of the surface sound source is about 40 °, the horizontal directivity angle of the line sound source is about 60 °, the horizontal directivity angle of the point sound source is about 120 °, The horizontal directivity angle of the sound source is about 15 °, the horizontal directivity angle of the line sound source is about 15 °, and the horizontal directivity angle of the point sound source is about 50 °.

  As described above, according to the present embodiment, clear sound can be radiated to each passenger seat even if there is a difference in depth and height between the passenger seats in the hall.

[Modification]
As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It can implement with another various form. For example, the present invention may be implemented by modifying the above-described embodiment as follows.

  In the embodiment described above, the speaker modules 10 having the box-shaped speaker boxes 11 are arranged. However, the shape of the speaker box is not limited to the box shape, and other shapes such as a polygonal column and a cylindrical shape are used. The speaker box may be used. Further, for example, the speaker box 11 is formed in a hexagonal column, and the speaker modules are arranged in the vertical direction and the horizontal direction so that the central axes of the speaker boxes are substantially parallel as shown in FIG. Also good.

  The number of speaker modules 10 arranged in the vertical and horizontal directions is not limited to the number shown in FIG. The number of the speaker modules 10 arranged in the vertical direction and the horizontal direction is required to be a suitable number depending on the size of the hall, the height difference of the audience seats, the size of the speaker module 10, the arrangement position of the array speaker 1, and the like. Further, a suitable directivity angle can be obtained for the size of the speaker module 10 constituting the surface sound source, the line sound source, and the point sound source and the arrangement position of the array speaker 1 according to the size of the hole and the inclination angle of the sound receiving surface. It may be different from the above-described embodiment.

  In the embodiment described above, an array speaker is configured by arranging a plurality of speaker modules. However, the array speaker 1 may be configured by arranging a plurality of speakers (woofers 12 and tweeters 13 in one speaker box. Good.

In an array speaker serving as a linear sound source, directivity can be controlled by controlling a signal supplied to each speaker module 10. Also in this embodiment, the directivity may be controlled so that the sound from the line sound source is emitted downward. In the case of this aspect, the speaker constituting the point sound source may not be provided.
Also in this embodiment, as described in Non-Patent Document 1, the speaker modules 10 are arranged so that the rows of the speaker modules 10 draw an arc when viewed from the side, and a wide directivity angle particularly with respect to a point sound source. It may be made easier to ensure.

The speaker module 10 serving as a point sound source may be arranged in the vertical direction of the line sound source at a predetermined distance instead of being connected to the speaker module group serving as a line sound source.
In addition, the speaker module serving as a point sound source may have a different speaker size than the speaker included in the speaker module constituting the line sound source and the surface sound source.
In addition, the speaker module serving as a point sound source may be configured such that the size of the speaker box is different from the size of the speaker modules constituting the line sound source and the surface sound source (for example, smaller).

1 is an external view of an array speaker according to an embodiment of the present invention. It is a figure explaining the directivity angle of the horizontal direction of the array speaker. It is a figure explaining the directivity angle of the perpendicular direction of the same array speaker. It is a front view of the array speaker which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Array speaker, 10 ... Speaker module, 11 ... Speaker box, 12 ... Woofer, 13 ... Tweeter.

Claims (5)

A speaker device that is provided above the stage in a hall that includes a plurality of speakers on the same plane, and the position of the audience seat increases as the distance from the stage increases .
A planar portion in which a plurality of speakers are arranged in a planar shape in the vertical and horizontal directions;
A linear portion in which a plurality of speakers are linearly arranged in the vertical direction;
With
The number of speakers arranged in the horizontal direction is reduced as the linear part continues in the vertical downward direction of the planar part and from the upper side to the lower side in the vertical direction.
Each speaker direction of the plurality of speakers is substantially parallel to a horizontal direction. The speaker device according to claim 1,
A plurality of speaker rows in which a plurality of speakers are arranged along the vertical direction are provided adjacent to each other symmetrically,
The number of speakers in each of the speaker rows arranged in the left-right symmetry decreases from the row at the center in the left-right direction of the speaker device toward the row at the left and right ends,
The speaker device, wherein each upper end portion of each speaker row is aligned.   The plurality of speakers has a hexagonal columnar speaker box for each set of one or a plurality of speakers, and the directions of the central axes of the plurality of hexagonal columnar speaker boxes are substantially parallel. 2. The speaker device according to 1.   The speaker device according to claim 1, wherein a directivity direction of a speaker at a lower end of the linear portion is inclined downward with respect to a horizontal direction.   The speaker device according to claim 1, wherein a directivity direction of sound from the speaker of the linear portion is inclined downward with respect to a horizontal direction.

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