JP2007037058A - Speaker system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a listener from feeling speaker positions. <P>SOLUTION: In a speaker system 10, speaker units SP0-SPn of one perpendicular line are disposed side by side within a housing 11 of a square pillar. Delay circuits DL0-DLn are connected to the speaker units SP0-SPn and by controlling delay amounts of the delay circuits DL0-DLn, outputs of the speaker units SP0-SPn have directivity to the floor and to the ceiling. Sounds output from the speaker units SP0-SPn are reflected on the floor or on the ceiling and given to a listener as indirect sounds. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a speaker device that includes a plurality of speaker units and controls the directivity of audio signals output from these speaker units.

  As a speaker system suitable for application to a home theater or AV system, there is a speaker array (see, for example, Patent Document 1). FIG. 17 shows an example of the speaker array 10. The speaker array 10 is an array of a large number of speakers (speaker units) SP0 to SPn. In this case, as an example, the diameter of the speaker is several centimeters. The speaker units SP0 to SPn are two-dimensionally arranged on a plane or arranged on a horizontal straight line.

  Then, the audio signal is supplied from the source SC to the delay circuits DL0 to DLn and delayed by a predetermined time τ0 to τn, and the delayed audio signal is supplied to the speakers SP0 to SPn through the power amplifiers PA0 to PAn, respectively. . The delay times τ0 to τn of the delay circuits DL0 to DLn will be described later.

Then, in any place, sound waves output from the speakers SP0 to SPn are synthesized, and the sound pressure as a result of the synthesis is obtained. Therefore, as shown in FIG. 17, in the sound field formed by the speakers SP0 to SPn, predetermined points Ptg and Pnc are
Ptg: A place where the sound pressure is desired to be higher than the surroundings. Sound pressure enhancement point.
Pnc: A place where the sound pressure is desired to be lower than the surroundings. Sound pressure reduction point.
Then, the method of setting an arbitrary place as the sound pressure enhancement point Ptg can be roughly divided into the methods shown in FIG. 17 or FIG.

That is, in the case of the method shown in FIG.
L0 to Ln: distance from each speaker SP0 to SPn to the sound pressure enhancement point Ptg s: sound speed, the delay times τ0 to τn of the delay circuits DL0 to DLn are
τ0 = (Ln−L0) / s
τ1 = (Ln−L1) / s
τ2 = (Ln−L2) / s
...
τn = (Ln−Ln) / s = 0
Set to.

  Then, when the audio signals output from the source SC are converted into sound waves by the speaker units SP0 to SPn and output, when the sound waves reach the sound pressure enhancement point Ptg, they all reach at the same time. The sound pressure at the pressure enhancement point Ptg is larger than the surroundings.

  That is, in the system of FIG. 17, a time difference is generated in each sound wave due to a path difference from the speaker units SP0 to SPn to the sound pressure enhancement point Ptg, and this time difference is compensated by the delay circuits DL0 to DLn. This is to focus the sound on Ptg. Hereinafter, this type of system is referred to as a “focus type”, and the sound pressure enhancement point Ptg is referred to as a “focus”.

  In the case of the method shown in FIG. 18, the delay times τ0 to τn of the delay circuits DL0 to DLn are set so that the phase wavefronts of the traveling waves (sound waves) output from the speaker units SP0 to SPn are the same. Thus, the directivity is given to the sound wave, and the directivity direction is set to the direction of the sound pressure enhancement point Ptg. The speaker array 20 can be considered as a case where the distances L0 to Ln are infinite in a focal system. Hereinafter, this type of speaker array 20 is referred to as a “directivity type”, and the direction of sound waves in which the phase wavefronts of the sound waves are aligned is referred to as a “directional direction”.

JP-A-9-233591

  In recent years, music contents including multi-channel audio sources have become widespread, and a speaker system designed to strongly feel the orientation of a sound image like the sound effect of movie contents has been provided. In such a speaker system, it is possible to obtain an appropriate sense of orientation when the listener is seated in the correct position by appropriately setting the characteristics and arrangement of the speakers corresponding to each channel.

  When listening to music as BGM, if the feeling of localization or the position of the speaker that produces sound is not clear, it may be possible to listen without worrying about localization at a wide listening position. Conventionally, as shown in FIG. 19, a separate speaker is attached to the rear side of the speaker (opposite the listener as viewed from the speaker), or an acoustic duct is provided, so that the indirect sound component due to reflection from the rear wall is heard. There is a speaker system.

  However, the speakers and ducts used in the speaker system of FIG. 19 are not wide in directivity and the energy of the output sound is small, so that there is a clear directivity as depicted in the dotted line in FIG. It cannot be obtained.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a speaker device that does not make the listener feel the speaker position.

  In order to solve the above-described problem, a speaker device according to the present invention includes a plurality of speaker units arranged in at least one row, and a delay processing unit that delays output of audio signals of the plurality of speaker units. The processing unit controls the delay time so that the main axis of sound directivity obtained as a result of combining the outputs of the plurality of speaker units is substantially upward or substantially downward.

  According to the speaker device to which the present invention is applied, the main axis of the directivity of the sound obtained as a result of synthesizing the outputs of the plurality of speaker units by delaying the output of the audio signals of the plurality of speaker units is substantially upward or substantially downward. The delay time is controlled so as to be in the direction. As a result, it is possible to provide sound that is reflected from the floor or ceiling output from the speaker device and does not make the listener feel the speaker position at a wide listening position.

  Hereinafter, a speaker device to which the present invention is applied will be described with reference to the drawings. FIG. 1 is an external view of a speaker device 10 to which the present invention is applied. In the speaker device 10 illustrated in FIG. 1A, the housing 16 is a quadrangular prism, and one row of speaker units SP <b> 0 to SPn are arranged on four side surfaces of the housing 16. The speaker device 10 outputs sound in four directions on a horizontal plane. In the speaker device 20 illustrated in FIG. 1B, the housing 16 is a quadrangular prism, and two rows of speaker units SP <b> 0 to SPn are arranged on the four side surfaces of the housing 16.

  FIG. 2 is a block diagram illustrating the internal structure of the speaker device 10. The speaker device 10 includes speaker units SP0 to SPn and delay circuits DL0 to DLn. The delay circuits DL0 to DLn delay the audio signal output from the sound source 11, and give directivity to the sound wave output from the speaker device 10. The directivity control of the speaker device 10 includes a “focus type” that focuses the sound at a certain point (sound pressure enhancement point) and a “directivity type” that aligns the phase wavefront of the sound wave.

FIG. 3 shows the principle of the directional speaker device. The directional speaker device delays the output of the audio signal so that sound waves output from all speaker units SP0 to SPn form the same phase wavefront P. The delay amount of each delay circuit is determined by the distance between the speaker units SP0 to SPn and the phase wavefront P. When the distance between the speaker unit SP0 closest to the phase wavefront P and the phase wavefront P is L0, the distance between the other speaker units SP1 to SPn and the phase wavefront P is PL1 to PLn. The delay circuits DL0 to DLn delay the output time to the speaker units SP0 to SPn by the time obtained by dividing the distances L0 to Ln by the sound speed c. (Expression 1) is an expression for calculating the delay time. In (Expression 1), the delay times of the delay circuits DL0 to DLn are expressed as pd0 to pdn, respectively.
pd0 = PL0 / c
pd1 = PL1 / c
pd2 = PL2 / c
...
pdn = PLn / c (Formula 1)
When the speaker device 10 controls the delay time in this way, the sound output from all the speaker units SP0 to SPn forms a planar sound wave.

FIG. 4 shows the principle of the focus type speaker device. In the focus type speaker device, sounds output from all the speaker units SP0 to SPn are concentrated on the focus Ptg. The delay amount of each of the delay circuits DL0 to DLn is determined by the distance between the speaker units SP0 to SPn and the focal point Ptg. The delay circuits DL0 to DLn delay the output time to the speaker units SP0 to SPn by the time obtained by dividing the distance difference FL0 to FLn between the speaker units SP0 to SPn and the focal point Ptg by the sound speed c. (Expression 1) is an expression for calculating the delay time. In (Expression 2), the delay times of the delay circuits DL0 to DLn are expressed as fd0 to fdn, respectively.
fd0 = FL0 / c
fd1 = FL1 / c
fd2 = FL2 / c
...
fdn = FLn / c (Formula 2)
When the speaker device 10 controls the delay time in this way, the sound output from all the speaker units SP0 to SPn reaches the focal point Ptg at the same time.

  In this embodiment, a sound wave having directivity regardless of “directivity type” or “focus type” is referred to as a beam. The speaker device 10 to which the present invention is applied outputs a beam to the floor or ceiling of the space where the speaker device 10 is disposed. In general, floors and ceilings are less likely to contain objects than walls, and are suitable for reflection. Between the floor and the ceiling, not only one reflection but also a plurality of reflections are likely to occur, and the indirect sound reaches the listener from many directions. Thereby, the effect that the listener does not feel the clear position of the speaker device 10 is obtained. Further, since the sound reaches not only from the height of the speaker device 10 but also from the height of the ceiling or floor, even when a listener stands or sits down, the change in sound pressure is felt to be small. Furthermore, since the speaker device 10 to which the present invention is applied controls the directivity of sound, the direction of the beam can be controlled with certainty, and the effect that energy is not reduced even with indirect sound can be obtained.

  The directivity control of the speaker device 10 is desirably a “directivity type” that emits a plane wave sound wave for the purpose of increasing the number of reflections on the ceiling / floor of the space in which the speaker device 10 is disposed. There is no problem even if the “focus type” is used in order to enhance the acoustic effect as reflected sound from the wall. Further, the “directivity type” and the “focus type” may be selected according to the user's preference and the purpose of use of the speaker.

  Next, another configuration of the speaker device 10 will be described with reference to FIG. The speaker device 10 uses a delay line 12 instead of a delay circuit. The delay line 12 is, for example, a circular buffer. The delay line 12 is a FIFO (first-in first-out) buffer that stores an audio signal input from the sound source 11 and releases data exceeding the capacity of the buffer. Since the delay line 12 is often implemented as a function of the DSP 13, the delay line 12 is drawn as a part of the DSP 13 in the following drawings.

  The DSP 13 controls the delay time. The operation of the DSP 13 until the sample S input to the delay lines DL0 to DLn is output to the speaker unit SP0 will be described with reference to FIG. A sample is a unit of data input to the delay line. Let T be the time required to input one sample.

  First, the delay line 12 inputs the sample S at time t0. Then, at time t1 (= t0 + T) when T time has elapsed from time t0, the delay line 12 inputs the next sample S1. Further, at time t2 (= t0 + 2T) when T time has elapsed, the delay line 12 inputs the second sample S2. During this time, the position of the sample S input first is gradually moved to the right. At time Da0, the sample S arrives at a position P0 output to the speaker unit SP0. The DSP 13 outputs the sample S that has arrived at the position P0 to the speaker unit SP0. Thereafter, the sample S moves with time. At time Da1, the DSP 13 arrives at the position P1. The DSP 13 outputs the sample S that has arrived at the position P1 to the speaker unit SP1. In this way, the DSP 13 delays the output of the audio signal.

  The sample delay time is related to the position where the sample is read. When the sample reading position is close to the sound source 11, the sample input from the sound source 11 is read immediately, so the delay time is long. When the sample reading position is far from the sound source 11, it takes time until the sample input from the sound source 11 moves to the reading position, so the delay time is short. Since the reading position can be controlled by software of the DSP 13, it can be easily changed.

  Next, another method of using the delay line 12 will be described. FIG. 6 shows an example in which beams in three directions of direction a, direction b, and direction c are generated simultaneously. In other words, the beam in the direction a is a sound wave having a phase wavefront Pa perpendicular to the direction a, the beam in the direction b is a sound wave perpendicular to the phase wavefront Pb, and the direction c is a sound wave perpendicular to the phase wavefront Pc.

  FIGS. 6A, 6B, and 6C illustrate operations of the processing blocks 13a, 13b, and 13c that generate beams in the directions a, b, and c. Specifically, the processing blocks 13a, 13b, and 13c are program modules for generating a beam by controlling a delay time. Each processing block 13a, 13b, 13c generates a beam in one direction. The DSP 13 operates the processing blocks 13a, 13b, and 13c simultaneously to generate three beams at the same time.

  FIG. 7 shows how the DSP 13 operates the three processing blocks 13a, 13b, and 13c simultaneously. When the three processing blocks 13a, 13b, and 13c are operated simultaneously, the three positions on the delay line shown in FIGS. 6A, 6B, and 6C are one speaker unit SP0 to SPn. Is associated with. Three samples read from the three positions are multiplexed and output from one speaker unit SP0-SPn. The multiplexed speech becomes a beam in three directions.

  In the delay control using the DSP 13, when the processing blocks (programs processed in parallel by the DSP) 13a, 13b, and 13c are increased, a plurality of beams can be generated without increasing the number of speaker units SP0 to SPn. it can.

  The delay times in the processing blocks 13a to 13c are stored in a database on the memory 14 in the form of presets. In other words, prior to the use of the speaker device 10, the delay time assumes a directivity direction that can increase indirect sound from the shape and size of the space in which the speaker device 10 is disposed, and assumes the assumed directionality. The delay time is calculated from the sex direction and recorded in the memory 14 as a preset. One or more presets are stored in the database. The preset recorded in the memory 14 can be selected by the user via the user selection unit 15.

  By changing the input to the processing blocks 13a, 13b, and 13c of the DSP 13, the output of the speaker device 10 is easily changed. FIG. 8 shows a state in which the processing blocks 13a, 13b, and 13c generate different audio signal X, Y, and Z beams. The processing blocks 13a, 13b, and 13c of the DSP 13 input different audio signals X, Y, and Z, respectively. Then, the samples of the three audio signals X, Y, and Z are multiplexed and output to the speaker units SP0 to SPn, and the beams of the audio signals X, Y, and Z are generated.

  In the delay control using the DSP 13, the different audio signals X, Y, and Z are delayed in the processing blocks 13a, 13b, and 13c, so that the number of the speaker units SP0 to SPn is not increased, and the different audio signals X and Y are delayed. , Z can be output simultaneously.

  FIG. 9 shows how the three processing blocks 13a, 13b, and 13c generate a plurality of beams having different delay times. The DSP 13 in FIG. 9 includes three delay circuits DLp, DLq, and DLr between the processing blocks 13a, 13b, and 13c and the sound source 11. The random delay generation unit 17 sets a predetermined delay time, for example, a random delay time, in the delay circuits DLp, DLq, DLr. The processing blocks 13a, 13b, and 13c of the DSP 13 generate beams in three directions of direction a, direction b, and direction c from the audio signals delayed by the delay circuits DLp, DLq, and DLr. Since this beam is synthesized in space, an effect like a digital delay effector can be obtained.

  In particular, the normal digital delay effect is a process completed within the computer because the final addition result of the delay element is calculated and then reproduced. When the delay control of FIG. 9 is used, since the delayed sound is radiated in different directions and then added in the space, the listener can be further expanded.

  Next, a speaker device 50 which is a modification of the speaker device 10 will be described with reference to FIG. In the speaker device 50, the speaker units SP0 to SPn are attached with an inclination. The inclination of the speaker units SP0 to SPn is substantially the same as the main axis of beam directivity obtained by combining the outputs of the speaker units SP0 to SPn. In the speaker device 50 shown in FIG. 10, the upper half speaker units SP0 to SPl are directed to the ceiling, and the lower half speaker units SPm to SPn are directed to the floor (SPl and SPm are middle speaker units). Each speaker unit SP <b> 0 to SPn is attached inside the housing 51 of the speaker device 50. By attaching the speaker units SP0 to SPn inside the housing 51 of the speaker device 50, portions corresponding to the ducts G1 to Gn are formed between the outlet of the housing 51 and the speaker units SP0 to SPn. Since the ducts G1 to Gn function as a kind of acoustic guide, the directivities of the speaker units SP0 to SPn can be increased. Thus, in the speaker device 50, the inclination of each of the speaker units SP0 to SPn is adjusted according to the directivity of the beam. Further, ducts G1 and G2 are provided in accordance with the directivity of the beam. Note that the ducts G <b> 1 to Gn may be configured to protrude outside the housing 51.

  Further, in the speaker device 50 of FIG. 10, the upper speaker units SP0 to SPl have ceiling directivity, and the lower speaker units SPm to SPn have floor directivity. There is an effect that it is possible to give only indirect sound reflected on the floor or ceiling without giving sound directly to the listener.

  The speaker device may be structured as shown in FIGS. A housing 34 shown in FIG. 11A is a quadrangular prism, and a plurality of speaker units SP <b> 0 to SPn are disposed inside the housing 34. Among the speaker units SP0 to SPn arranged vertically, the output direction of the upper half speaker units SP0 to Spl is upward in the vertical direction, and the output direction of the lower half speaker units SPm to SPn is downward in the vertical direction.

  The speaker device 30 is provided with an acoustic guide 33. As shown in FIG. 11B, the acoustic guide 33 includes a quadrangular pyramid guide component 31 provided at a position facing the speaker unit SP and a guide component 32 provided on the speaker unit SP side. The guide component 31 and the guide component 32 are separated from each other by a predetermined interval, and this separated space serves as the acoustic guide 33. The speaker device 30 provides directivity at a predetermined angle from the horizontal plane by outputting sound waves through the acoustic guide 33.

  FIG. 12 is an external view of the speaker device 30. The speaker device 30 is provided with openings 330 to 33n of the acoustic guide 33 at predetermined intervals. As shown in FIG. 12A, when the openings 330 to 33n of the acoustic guide 33 are provided on all side surfaces of the speaker device 30, as shown in FIG. A radial sound wave is output to Further, the speaker device 30b shown in FIG. 12C has a structure that does not output sound from the surface of the housing facing the listener's listening area. More specifically, when one of the openings 330 to 33n on the four side walls of the speaker device 30a is closed, as shown in FIG. 12 (d), only the direction in which the openings 330 to 33n are opened. Sound waves are output. The speaker device 30a can limit the direction of sound waves depending on whether the openings 330 to 33n of the acoustic guide are opened or closed. Accordingly, for example, by closing the acoustic guide 33 on the surface where the listener is present, it is possible to reduce the direct sound to the listener who faces this surface.

  FIG. 13 is an external view of a cylindrical speaker device 40. As shown in FIG. 13A, in the speaker device 40, among the speaker units SP0 to SPn arranged vertically, the upper half speaker units SP0 to SPl output sound upward in the vertical direction, and the lower half speaker. The units SPm to SPn output sound downward in the vertical direction. The speaker device 40 is provided with an acoustic guide 43 that outputs sounds of the speaker units SP0 to SPn radially. As shown in FIG. 13B, the acoustic guide 43 includes a conical guide member 41 provided at a position facing the speaker unit SP, and a bowl-shaped guide member 42 provided on the speaker unit SP side. Consists of. The guide member 41 and the guide member 42 are separated from each other by a predetermined interval, and the separated space serves as the acoustic guide 43 of the speaker unit SP. The speaker device 40 gives directivity to the sound wave by outputting the sound wave through the acoustic guide 43. The acoustic guide 43 can output sound waves that spread uniformly on a horizontal plane with the speaker unit SP as the center.

  FIG. 14 is an external view of the speaker device 40. The speaker device 40 is provided with acoustic guides 430 to 43n for outputting sound waves at predetermined intervals. As shown in FIG. 14A, when the openings 430 to 43n of the acoustic guide 43 are provided on the entire side surface of the speaker device 40, all directions around the speaker device 40 as shown in FIG. Sound waves are output. Further, the speaker device 40b shown in FIG. 14 (c) has a structure that does not output sound from the surface of the housing facing the listener's listening area. More specifically, when the openings 430 to 43n of the acoustic guide 43 on a part of the side wall of the speaker device 40b are closed, as shown in FIG. 14 (d), the opening 430 of the acoustic guide 43 is provided. Sound waves are output only in the direction in which ˜43n is opened. The speaker device 40 can limit the direction of sound waves depending on whether the openings 430 to 43n of the acoustic guide 43 are opened or closed.

  FIG. 15 shows an arrangement example of speaker devices. In FIG. 15, the speaker devices 40-1 to 40-7 are used as multi-channel speakers. In FIG. 15, centering on the listener, four speaker devices 40-4 to 40-7 are arranged in front of the listener, and three speaker devices 40-1 to 40-3 are arranged on the back of the listener. Channels corresponding to the arranged positions are assigned to the speaker devices 40-1 to 40-7. The speaker devices 40-1 to 40-7 output a beam to the floor or ceiling, and form a sound field with indirect sound reflected from the floor or ceiling.

  A plurality of channels may be assigned to one speaker device. In FIG. 16, Rch is assigned to speaker units RSP0 to RSPn on the right side of one speaker device 60, and Lch is assigned to speaker units LSP0 to LSPn on the left side. The sound output from the speaker units RSP0 to RSPn on the right side is reflected by the right floor, ceiling, and wall. The sound output from the speaker units LSP0 to LSPn on the left surface is reflected by the left floor, ceiling, and wall. The listener can listen to the indirect sound of the left and right channels.

  As described above, the speaker devices 10 to 60 to which the present invention is applied arrange the speaker units in a direction perpendicular to the floor surface, and direct the directivity of sound waves output from the speaker units toward the floor or ceiling. In general, floors and ceilings are less likely to contain objects than walls, and are suitable for reflection. In addition to a single reflection, there is a high possibility that multiple reflections will occur on the floor, ceiling, and wall, and indirect sounds will reach the listener from many directions. Thereby, the effect that the listener does not feel the clear position of the speaker device is obtained.

  In addition, since the sound reaches from the height of the ceiling or floor, even when the listener stands or sits down, the change in sound pressure can be felt little. Furthermore, since the directivity of the sound wave is controlled by the speaker array, the direction of the beam can be controlled with certainty, and the effect that the energy does not decrease even with an indirect sound can be obtained.

1 is an external view of a speaker device to which the present invention is applied. It is a block diagram which shows the structure of a speaker apparatus. It is a conceptual diagram explaining the principle of a directional speaker apparatus. It is a conceptual diagram explaining the principle of a focal type speaker apparatus. It is a conceptual diagram explaining delay control by DSP. It is a conceptual diagram explaining delay control of DSP when outputting three beams one by one. It is a conceptual diagram explaining delay control of DSP when outputting three beams simultaneously. It is a conceptual diagram explaining the delay control of DSP when outputting the beam which consists of a different sound source simultaneously. It is a conceptual diagram explaining the delay control of DSP when outputting the beam which consists of the same sound source by shifting time. It is sectional drawing of the modification of a speaker apparatus. It is the schematic explaining the structure of a columnar speaker apparatus. It is an external view explaining the audio | voice output direction of a speaker apparatus. It is the schematic explaining the structure of a column-shaped speaker apparatus. It is an external view explaining the audio | voice output direction of a speaker apparatus. It is a conceptual diagram which shows the structure of the multichannel speaker system using a speaker apparatus. It is a conceptual diagram explaining a mode when the audio | voice of each different channel is output from the different side surface of one speaker apparatus. It is a conceptual diagram which shows an example of the conventional focus type speaker apparatus. It is a conceptual diagram which shows an example of the conventional directional speaker apparatus. It is a conceptual diagram which shows the direction of the directivity of the audio | voice output from the conventional speaker system.

Explanation of symbols

10, 20, 30, 40, 50, 60 Speaker device, DL0 to DLn delay circuit, SP0 to SPn speaker unit, 11 sound source, 12 delay line, 13 DSP, 13a, 13b, 13c processing block, 14 memory, G1 to Gn Duct, 31 guide component, 32 guide component, 33 acoustic guide, 330-33n opening

Claims (9)

A plurality of speaker units arranged in at least one row;
A delay processing unit that delays output of audio signals of the plurality of speaker units,
The speaker device, wherein the delay processing unit controls the delay time so that a main axis of directivity of sound obtained as a result of synthesizing outputs of the plurality of speaker units is substantially upward or substantially downward.   The speaker device according to claim 1, wherein the plurality of speaker units are arranged in a vertical direction. A delay time recording section that records a combination of delay times;
The speaker device according to claim 1, further comprising: a delay time selection unit that allows a user to select a combination of the delay times.   The speaker device according to claim 1, wherein the plurality of speaker units are arranged on a surface excluding a surface of the housing facing the listener's listening area.   5. The speaker device according to claim 4, wherein each speaker unit outputs sound of a different channel for each of the main axes of directivity.   2. The speaker device according to claim 1, wherein each speaker unit is disposed so as to be substantially in the same direction as a main axis of directivity of sound obtained as a result of combining outputs of the plurality of speaker units.   Each speaker unit is disposed vertically upward or vertically downward, a guide space having a predetermined angle with respect to a horizontal plane on which the speaker unit is disposed, and the sound output from the speaker unit is The speaker device according to claim 1, wherein the speaker device passes through the guide space.   The speaker device according to claim 1, wherein the delay processing unit multiplexes audio signals having different delay times and outputs a plurality of sounds having different directivities from the plurality of speaker units.   2. The speaker device according to claim 1, wherein the delay processing unit controls the delay time of each speaker unit by reading an audio signal input to the delay line at a position corresponding to each speaker unit.

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