JP2019004269A - Acoustic device - Google Patents

Abstract

An audio device that outputs an audio signal of a plurality of channels may have a different sound output direction of an optimum speaker depending on the format of the input audio signal. It was necessary to reset the sound output direction of the channel speaker to the optimum direction. The present invention provides an audio apparatus that can eliminate the troublesomeness of a user to reset the sound emission direction of a speaker. A sound output direction control for controlling a sound output direction of at least some of the speakers of the plurality of channels and a speaker of the plurality of channels and a speaker of the plurality of channels. And the sound emission direction control unit controls the sound emission direction based on the format of the acoustic signal determined by the determination unit. [Selection] Figure 2

Description

  The present invention relates to an acoustic device.

  In order to adjust the sound output direction of a sound device having a plurality of channels of speakers, the user can control a drive motor arranged on the speaker base by remote control to rotate the speakers to a desired angle. Are known. Japanese Patent Application Laid-Open No. 2004-228561 describes a technique for synchronously rotating a speaker arranged on a turntable of a display unit and a left and right speaker arranged on a turntable arranged independently on the left and right of the display unit. ing.

JP 2007-295380 A

  An acoustic device that outputs acoustic signals of a plurality of channels may have different optimal sound emitting directions of speakers depending on the format of the input acoustic signal. For example, in the case of a two-channel stereo signal, a surround signal, Dolby Atmos (registered trademark), etc., it may be better to set the speakers in different sound emission directions. In the above-described background art, when the user switches the source of the sound signal and the format changes, the user needs to reset the sound emission direction of the speaker of each channel to the optimum direction. Moreover, in patent document 1, since all the speakers rotate synchronously, depending on the format of the acoustic signal, it was not possible to direct the sound in the optimum sound emitting direction.

  The present invention has been made in view of the above problems, and an audio device that can eliminate the troublesomeness of a user to reset the sound output direction of a speaker each time the format of an input audio signal is switched. It is to provide.

  The acoustic device of the present invention includes a determination unit that determines the format of an input acoustic signal, a speaker of a plurality of channels, and a sound source that controls a sound emission direction of at least some of the speakers of the plurality of channels. A sound direction control unit, and the sound emission direction control unit controls the sound emission direction based on the format of the acoustic signal determined by the determination unit.

  ADVANTAGE OF THE INVENTION According to this invention, the setting operation of the sound emission direction of a loudspeaker becomes unnecessary every time the format of an audio signal is switched, and an audio apparatus capable of realizing a suitable listening environment can be provided.

It is a figure which shows an example of the external appearance of the audio equipment which concerns on embodiment of this invention. It is a figure which shows an example of a structure of the audio equipment concerning embodiment of this invention. It is a block diagram which shows an example of a structure of the audio equipment concerning embodiment of this invention. It is a table | surface which shows an example of the operation mode of the audio equipment concerning embodiment of this invention. It is a figure which shows an example of the external appearance of the operation state of the audio equipment which concerns on embodiment of this invention. It is a figure which shows an example of the external appearance of the operation state of the audio equipment which concerns on embodiment of this invention. It is a figure which shows an example of the external appearance of the operation state of the audio equipment which concerns on embodiment of this invention. It is a block diagram which shows an example of a structure of the audio equipment concerning embodiment of this invention. It is a figure which shows an example of the external appearance of the operation state of the audio equipment which concerns on embodiment of this invention. It is a figure which shows an example of the external appearance of the operation state of the audio equipment which concerns on embodiment of this invention.

  Hereinafter, embodiments according to the acoustic device of the present invention will be described. FIG. 1 is a diagram showing an external appearance of an audio device 1 according to an embodiment of the present invention, and is a view of the audio device 1 as viewed from the front (listener side). The audio device 1 includes a first left channel speaker (FL1) 2, a second left channel speaker (FL2) 3, a center channel speaker (C) 4, a second right channel speaker (FR2) 5, and a first right channel speaker (FR1). 6) It is a so-called bar-type sound device having 6-channel speakers and these speakers being housed in one housing. Hereinafter, a bar-type audio device will be described as an example. However, the present invention is not limited to this, and can be applied to an audio device other than the par type, for example, in which speakers of each channel are arranged in independent housings. . The number of speaker channels will be described by taking 5 as an example, but is not limited thereto.

  The audio device 1 includes a first left channel speaker housing 7 that houses a first left channel speaker 2, a second left channel speaker 3, a center channel speaker 4, and a center channel speaker housing that houses a second right channel speaker 5. 8. It comprises a first right channel speaker housing 9 that houses the first right channel speaker 6, which together constitute a bar-type acoustic device. The first left channel speaker housing 7 and the center channel speaker housing 8 are joined by a joint portion 10. Similarly, the first right channel speaker housing 9 and the center channel speaker housing 8 are also joined by the joint portion 10. FIG. 1 shows an example in which these casings are connected in a straight line. Here, the straight line includes a case where the cases are connected in a curved manner.

  The center channel speaker housing 8 has an installation surface 11 for installing the acoustic device 1 on a television stand or the like. As will be described later, since the first left channel speaker housing 7 and the first right channel speaker housing 9 can change the sound emission direction by rotating, the first left channel speaker housing 7 and the first right channel speaker housing 7 can be changed. The channel speaker housing 9 is joined while being slightly lifted from the installation surface 11 when the acoustic device 1 is viewed from the front.

  FIG. 2 is a diagram illustrating a configuration of the acoustic device 1 according to the embodiment of the present invention. The first left channel speaker housing driving unit 20 and the first right channel speaker housing driving unit 23 arranged in the center channel speaker housing 8 are respectively connected to the first left channel speaker housing 7 via the joint 10. , And the first right channel speaker housing 9. The first left channel speaker housing drive unit 20 and the first right channel speaker housing drive unit 23 are composed of a pulse motor and a gear box, and drive the motor based on a signal from a motor control unit 38 to be described later. The orientation of the first left channel speaker housing 7 and the second right channel speaker housing 9 can be changed.

  When the direction of changing the orientation of the first left channel speaker housing 7 and the first right channel speaker housing 9 is, for example, two directions (vertical direction and horizontal direction), two motors are arranged, You can control with. When used as a surround speaker, the sound emission direction is controlled in the horizontal direction, and when used as a Dolby Atmos enabled speaker (Enabled Speaker), the sound emission direction is controlled up and down. Of course, one motor may be switched between gearboxes.

  In the above-described embodiment, the example in which the sound emitting direction of the speaker is controlled by changing the direction of the housing that accommodates the speaker is shown, but the present invention is not limited to this, and the housing without changing the direction of the housing. The sound emission direction may be changed by rotating the speaker unit inside the. Further, a fin for controlling the sound emission direction may be arranged on the sound emission side of the speaker unit, and the direction of the fin may be changed. In these cases, the bottom surfaces of the first left channel speaker housing 7 and the first right channel speaker housing 9 may be the same as the installation surface 11 when viewed from the front of the acoustic device 1.

  A signal is supplied from the amplifier 21 to the speaker of each channel. The amplifier 21 is accommodated in the center channel speaker housing 8. A signal to the amplifier 21 is supplied by a cable connected to a connector (not shown), or wireless communication such as Bluetooth (registered trademark) or wireless LAN (Local Area Network). The power source 22 is also accommodated in the center channel speaker housing 8. Power is supplied from the power source 22 to the amplifier 21, the first left channel speaker housing drive unit 20, and the first right channel speaker housing drive unit 23.

  The present invention can also be implemented with a structure in which the speakers of each channel are separated and independent, but in the case of a bar-type speaker in which the housing is integrated as shown in FIG. 2, a plurality of motors are driven. Therefore, the power source 22 can be shared, and the power source of the amplifier 21 can be shared. Therefore, the cost can be reduced.

  In the case of a bar-type speaker, the motors of the first left channel speaker housing drive unit 20 and the first right channel speaker housing drive unit 23 can be shared. In this case, for example, the first left channel speaker housing driving unit 20 and the first right channel speaker housing driving unit 23 may be coupled by a shaft and driven by one motor. As a result, the cost can be reduced by sharing the motor.

  In addition, by housing the power supply 22 and the amplifier 21 in the center channel speaker housing 8, the acoustic device 1 can be stably installed. In the present embodiment, since the first left channel speaker housing 7 and the first right channel speaker housing 9 are movable, it is important that they are stably installed when the motor is driven. Since bar-type speakers are often installed in front of a television, a low height is often required so as not to hinder the viewing of the television screen. In order to suppress the height, it is often not preferable to dispose a fixing tool or a suction tool on the installation surface 11. In the present invention, since the relatively heavy power source 22 and amplifier 21 are disposed in the center channel speaker housing 8 having the installation surface 11, the acoustic device 1 can be stably installed, By omitting the adsorber, the height can be reduced and the cost can be easily reduced.

  It should be noted that the present invention can be implemented even if the amplifier 21 or the power source 22 is disposed outside the acoustic device 1. It is also possible to arrange both the amplifier 21 and the power source 22 outside the acoustic apparatus 1.

  FIG. 3 is a block diagram showing the configuration of the acoustic device 1 according to the embodiment of the present invention. The audio device 1 has five speakers (2 to 6) and corresponds to a 5.1 channel surround system. In FIG. 3, the subwoofer is omitted because it is arranged as a separate housing from the acoustic device 1. The present invention is not limited to a 5.1 channel surround system.

  The audio device 1 receives an input signal (acoustic signal) in a predetermined format having a component corresponding to each speaker channel by inputting a reproduction signal of a sound source such as a recording medium or a television signal. And a signal processing unit 31 that decodes the signal acquired by the input processing unit 30 into an acoustic signal of each channel and performs signal processing for each acoustic signal of each channel, and a digital signal of each channel output from the signal processing unit 31 Is converted to an analog signal, an amplifier 35 for amplifying the output of the D / A converter 34, and speakers 2 to 6 corresponding to each channel. When a television signal is input to the input processing unit 30, an acoustic signal is extracted and processed. A signal obtained by extracting an acoustic signal from the television signal may be input to the input processing unit 30.

  Furthermore, the acoustic device 1 includes a system control unit 33 that controls the entire acoustic device 1. The system control unit 33 acquires signals from the operation unit 32 that acquires user input information, the input processing unit 30, and the signal processing unit 31. Further, the system control unit 33 controls the amplifier 35 based on the acquired signal. Further, the system control unit 33 acquires a signal related to the format of the input acoustic signal output from the determination unit 36 included in the input processing unit 30 and controls the motor control unit 38.

  The signal processing unit 31 performs addition of delay time, addition of reverberation components, adjustment of each frequency component, addition to acoustic signals of other channels, and the like on the decoded input signal (acoustic signal). Each processed acoustic signal is converted into an analog signal by the D / A converter 34, and the signal level is adjusted by the amplifier 35 and output to the speakers 2-6. The signal level adjusted by the amplifier 35 is performed by controlling the amplifier 35 based on the information acquired from the signal processing unit 31 by the system control unit 33. By these processes, an acoustic space with a sense of reality (surround feeling) can be provided.

  The operation unit 32 is a remote controller that performs various controls related to the audio device 1, buttons provided in the audio device 1, and the like. The operation unit 32 receives user input and transmits the information to the system control unit 33. The user input may include information regarding the format type of the input signal (acoustic signal).

  The determination unit 36 constitutes a part of the input processing unit 30 and determines the format type of the input acoustic signal. Here, the format of the acoustic signal is a 2CH stereo signal, a 5.1CH surround signal, a 3D surround signal (for example, a Dolby Atmos signal), a monaural signal, or the like. The determination by the determination unit 36 determines the type of format such as the number of channels of the acoustic signal and Dolby Atmos based on the identification signal (feature) included in the acoustic signal input to the input processing unit 30.

  The input processing unit 30, signal processing unit 31, D / A converter 34, amplifier 35, system control unit 33, determination unit 36, and motor control unit 38 shown in FIG. 3 are included in the amplifier 21 in the block diagram of FIG. However, a part of the functions may be arranged outside the housing of the sound device 1 or a device such as an audio amplifier may perform its role.

  A signal related to the type of audio signal format output from the determination unit 36 or a signal related to the type of audio signal format output from the operation unit 32 is input to the system control unit 33. The system control unit 33 controls the signal processing unit 31 based on a signal related to the type of format of the acoustic signal. Further, the motor driving unit 38 is controlled to control the first left channel speaker housing driving unit 20 and the first right channel speaker housing driving unit 23. As a result, according to the type of the format of the acoustic signal, it is possible to set the optimum sound emitting direction of the speaker without moving the speaker installation direction directly. Note that the type of the format of the acoustic signal may be based on information input to the operation unit 32 by the user.

  FIG. 4 shows the format type of the input acoustic signal and the acoustic signals input to the five speakers. The type of the format of the acoustic signal is based on the result determined by the determination unit 36 as described above or the result input by the user to the operation unit 32.

  The format of the input signal is 2CH stereo, surround (5.1 channel surround), 3D surround, and monaural. The dining mode, BGM mode, and family mode will be described later. The five speakers are FL1, FL2, C, FR2, and FR1. When the format type is 2CH stereo, FL (front left) signals are input to FL1 and FL2, and FR (front right) signals are input to FR1 and FR2. No signal is input to C.

  When the format type is surround, SL (surround left) signal for FL1, FL (front left) signal for FL2, C (center) signal for C, FR (front right) signal for FR2, and FR1 for FR1 SR (Surround Write) signal is input. The shaded portion in the table of FIG. 4 indicates a channel that changes the sound output direction of the speaker based on the acoustic signal format.

  When the format type is 3D surround, the FL1 channel and the FR1 channel in the case of surround are replaced with an enabled speaker signal (Enabled). An enabled (L) signal is input to FL1, and an enabled (R) signal is input to FR1. Also in this case, FL1 and FR1 are controlled in the sound output direction of the speaker.

  When the format type is monaural, a MONO (monaural) signal is input only to FL1 and FR1. In this case, the sound output direction of the speaker remains the same (in the direction of the listener) as in the case of 2CH stereo.

  FIG. 5 is a diagram showing the movement of the speaker when the type of the input acoustic signal is surround in FIG. 4, and is a diagram of the acoustic device 1 as viewed from above. The SL signal and the SR signal are input to the first left channel speaker 2 and the first right channel speaker 6 arranged at both ends of the acoustic device 1, respectively. In order to improve the sense of presence (surround feeling) of surround, the sound emission directions of the first left channel speaker 2 and the first right channel speaker 6 are controlled so as to be directed outward as viewed from the listening position. Thereby, since the reflection by the wall surface of the room in which the acoustic device 1 is installed can be used more effectively, it is possible to provide an acoustic space with improved surround realism. The angle at which the sound emission direction is moved is calculated from the average room size in the area where the sound device 1 is shipped.

  FIG. 6 is a diagram showing the movement of the speaker when the type of the input signal format is 3D surround in FIG. 4, and is a side view of the acoustic device 1 as viewed from the first right channel speaker 6 side. (A) is the state before the sound emission direction control which turned the sound emission direction of the 1st right channel speaker 6 to the front (listener side). An enabled (L) signal and an enabled (R) signal are input to the first left channel speaker 2 and the first right channel speaker 6 arranged at both ends of the audio device 1, respectively. Since the enabled speaker uses the reflected sound from the ceiling and provides a three-dimensional presence, the sound emission direction of the first left channel speaker 2 and the first right channel speaker 6 is directed upward as shown in (b). It is controlled to turn. The angle in the sound emission direction is, for example, 70 degrees from the horizontal plane. Thereby, since reflection by the ceiling of the room in which the acoustic device 1 is installed can be used, it is possible to provide an acoustic space with a 3D surround presence.

  As described above, since the direction of the speaker can be automatically set according to the format of the input signal, it is not necessary for the user to manually change the direction of sound emission of the speaker. Even when the sound source is changed, the trouble of manually changing the sound output direction every time is also eliminated.

  In the embodiment described above, the angle for changing the sound emission direction may be set in advance, or may be set in advance by the user. In addition, after setting the direction automatically, the user may adjust the sound emission direction by operating the operation unit 32 according to preference.

  In the case of a bar type speaker, the speakers of each channel are fixed to each other in the correct positional relationship. Since the sound emission direction of some speakers is changed with respect to the correct positional relationship, it is easy to set the correct sound emission direction according to the format of the acoustic signal. Unlike the bar type speaker, when the user arranges the speaker of each channel individually, the arrangement is not always correct, so the sound emission direction is automatically set according to the format type of the input signal. However, the setting is not always correct. Bar-type speakers can solve this problem.

  In addition, when the sound emission direction is changed by moving the housing (the first left channel speaker housing 7 and the first right channel speaker housing 9), it is recognized that the type of the format of the input signal is switched visually. This allows the user to feel the effect of switching the acoustic space. It also stimulates the user's sense of fun. Further, when the audio device 1 is displayed at a store, it is possible to visually appeal to the customer that the type of the input signal has been switched.

  Next, FIG. 7 shows an embodiment when the dining mode is selected in the table of FIG. When the input signal format type is determined to be 2CH stereo, surround, or 3D surround, or when input by the user and the user wants to enjoy music at an arbitrary listening position, the user can eat from the operation unit 32. Select a mode.

  The FL signal is input to the first left channel speaker 2 and the FR signal is input to the first right channel speaker 6. P indicates a listening point. When the listening point P is not in front of the audio device 1, the user adjusts the first left channel speaker housing 7 and the first right channel speaker housing 9 toward the listening point from the operation unit 32 such as a remote controller. . For example, the sound device 1 is arranged in front of a television in a living room, and is suitable for an application in which it is desired to listen to music while eating in a dining room adjacent to the living room. Thereby, the position which is not the front of the sound apparatus 1 can be made into a favorable listening point, without changing the position of a speaker.

  An embodiment when the BGM mode is selected in the table of FIG. 4 will be described. When the input signal format type is determined to be 2CH stereo, surround, or 3D surround, or when it is input by the user, the user wants to enjoy music like a BGM that spreads throughout the room. The BGM mode is selected from the operation unit 32. The first left channel speaker 2 receives an FL signal, and the first right channel speaker 6 receives an FR signal. When the BGM mode is selected, the sound emission direction of the first left channel speaker 2 and the first right channel speaker 6 is automatically controlled to face the ceiling direction. As a result, it is possible to enjoy a BGM-like sensation that spreads throughout the room using ceiling reflection.

  An embodiment when the family mode of FIG. 4 is selected will be described. When the user selects the family mode from the operation unit 32 in a state where two types of acoustic signals can be input to the acoustic device 1, two types of acoustic signals are input to the input processing unit 30. One acoustic signal is input to FL1 as input A, and the other acoustic signal is input to FR1 as input B. When the input audio signal has a format having a plurality of channels, the signal processing unit 31 performs processing for conversion to a monaural signal. When two users want to listen to different acoustic signals, such as music and news, in the room in which the sound device 1 is installed, the first left channel speaker 2 and the first right channel speaker 6 are respectively directed to the user who wants to listen. The sound emission direction is controlled so that sound is emitted. The user controls the sound emission direction with the operation unit 32. Thereby, two users can enjoy different acoustic signals in the room where the acoustic device 1 is installed.

  In the above embodiment, the sound emission direction of the speakers at both ends of the bar type speaker having five channels is changed, but the present invention is not limited to this. For example, the sound output direction of the second left channel speaker 3 and the second right channel speaker 5 may be movable, and the first left channel speaker 2 and the first right channel speaker 6 at both ends may be fixed. Further, the number of speaker channels may be increased, and a movable speaker and a fixed speaker may be appropriately combined. For example, the number of channels is set to 7, SL, Enable (L), FL, C, FR, Enable (R), SR signals are input, and SL, Enable (L), Enable (R), SR signals are input. The sound output direction of the input speaker may be controlled.

(Modification 1)
FIG. 8 is a block diagram of the acoustic device 1 according to Modification 1 of the present invention and Modification 2 described later. An A / D converter 40, a microphone amplifier 41, and a microphone 42 are added to the block diagram of FIG. Although not shown, the signal processing unit 31 includes a test signal generation unit. Based on an instruction signal from the system control unit 33 that has received an instruction input from the user, a test sound signal for generating a test sound pulse of a predetermined frequency is generated from a speaker from the test signal generation unit. The test sound signal is transmitted to speakers (first left channel speaker 2 and first right channel speaker 6) that can change the sound emission direction at different timings.

  The microphone 42 is disposed by the user at a listening position in front of the acoustic device 1. The microphone picks up the test sound generated from the speaker of the audio device 1. The collected test sound signal is amplified by the microphone amplifier 41, converted to a digital signal by the A / D converter 40, and input to the signal processing unit 31. The A / D converter 40, the microphone amplifier 41, the microphone 42, and the test signal generator may be equivalent to those used in a known technique for correcting the sound field of the surround system.

  FIG. 9 is a view of the audio device 1 as viewed from the side (the first right channel speaker 6 side), and is a case where the format type of the input signal is 3D surround. The sound emission direction of the first right channel speaker 6 (the same applies to the first left channel speaker) is directed obliquely upward so that the reflected sound of the ceiling 50 can be used in accordance with the input signal. The test sound generated from the first right channel speaker 6 is reflected by the ceiling 50 and collected by the microphone 42 disposed at the user's listening position. The system control unit 33 stores the intensity of the collected test sound.

  The system control unit 33 issues an instruction signal for causing the signal processing unit 31 to generate a test sound signal, and sequentially changes the sound emission direction to the motor control unit 38 to the first right channel speaker housing driving unit 23 within a predetermined range. Give instructions. A test sound is generated for each sound emission direction that has been sequentially changed, and the strength of the test sound collected each time is obtained and stored. Among the stored test sound intensities, the sound emission direction corresponding to the highest intensity is set. Note that the same processing may be performed for the first left channel speaker 2 or may be matched with the optimal setting sound emission direction of the first right channel speaker 6.

(Modification 2)
FIG. 10 is a view of the acoustic device 1 as viewed from the side surface (the first right channel speaker 6 side), as in the first modification, and shows a case where the format type of the input signal is 3D surround. In order to obtain the optimum angle for using the reflected sound of the ceiling 50, the height of the ceiling 50 is first calculated. In response to an instruction from the system control unit 33 that has received an instruction input from the user, the first right channel speaker housing driving unit 23 directs the sound emission direction of the first right channel speaker 6 directly above and similarly generates a test sound. . The acoustic device 1 has a built-in microphone 51 (corresponding to the microphone 42 in FIG. 8), and collects the reflected sound of the test sound from the ceiling 50. The height to the ceiling 50 is measured by subtracting the sound collection timing from the test sound generation timing.

  Next, the distance from the acoustic device 1 to the listening position is measured. A microphone 42 is disposed at the listening position, and the system control unit 33 controls the sound output direction of the first right channel speaker 6 to face the listening position to generate a test sound. The distance from the acoustic device 1 to the listening position is measured by subtracting the sound collection timing from the test sound generation timing.

  The sound emission direction of the first right channel speaker 6 is set based on the measured distance from the acoustic device 1 to the ceiling 50 and the distance from the acoustic device 1 to the listening position. The first right channel speaker 6, the listening position, and the reflection point on the ceiling 50 may be set to be an isosceles triangle. The same processing may be performed for the first left channel speaker 2 or may be matched with the optimal setting sound emission direction of the first right channel speaker 6. Although the microphone 51 has been described as being built in the audio device 1, the user may place the microphone 42 in the vicinity of the audio device and perform the same measurement.

  The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist or concept of the invention that can be read from the claims and the entire specification. It is also included in the technical scope of the present invention.

  The present invention can be suitably employed in an acoustic device.

  DESCRIPTION OF SYMBOLS 1 ... Sound apparatus, 2 ... 1st left channel speaker (FL1), 3 ... 2nd left channel speaker (FL2), 4 ... Center channel speaker (C), 5 ... 2nd right channel speaker (FR2), 6 ... 1st 1 ... right channel speaker (FR1), 7 ... first left channel speaker housing, 8 ... center channel speaker housing, 9 ... first right channel speaker housing, 10 ... joint, 11 ... installation surface, 20 ... first Left channel speaker housing drive unit, 21 ... amplifier, 22 ... power supply, 23 ... first right channel speaker housing drive unit, 30 ... input processing unit, 31 ... signal processing unit, 32 ... operation unit, 33 ... system control unit 34 ... D / A converter, 35 ... amplifier, 36 ... determination unit, 38 ... motor control unit, 40 ... A / D converter, 41 ... microphone amplifier, 4 ... microphone, 50 ... ceiling, 51 ... microphone

Claims (11)

A determination unit for determining the format of the input acoustic signal;
With multiple channel speakers,
A sound emission direction control unit for controlling the sound emission direction of at least some of the speakers of the plurality of channels;
And having
The sound emission direction control unit controls the sound emission direction based on the format of the acoustic signal determined by the determination unit.   The acoustic device according to claim 1, wherein the determination unit determines the format based on characteristics of the acoustic signal. An input receiving unit for receiving an input specifying the format by the user;
The acoustic device according to claim 1, wherein the determination unit determines the format based on an input specifying the format received by the input reception unit.   The acoustic device according to claim 1, further comprising a single housing that accommodates the speakers of the plurality of channels. The one housing is configured by connecting a plurality of housings in an odd number, linearly,
The acoustic device according to claim 4, wherein the sound emission direction control unit does not perform sound emission direction control of a speaker housed in a housing disposed in the center among the plurality of housings.   The acoustic device according to claim 5, wherein the casing disposed at the center has an installation surface when the acoustic device is installed.   The acoustic apparatus according to claim 5, wherein the casing disposed in the center accommodates an amplifier that drives the plurality of speakers.   The acoustic apparatus according to claim 7, wherein the casing disposed in the center accommodates a power source of the amplifier that drives the plurality of speakers.   The acoustic device according to claim 5, wherein the casing disposed in the center accommodates a power source that drives the sound emission direction control unit. A test sound generator that causes the speaker to generate a test sound;
An intensity information acquisition unit for acquiring information on the intensity of the test sound collected at the listening position of the user;
And having
In the case where the determination unit determines that the format is a format that uses ceiling reflected sound,
The sound emission direction control unit controls the sound emission direction of the speaker in a vertical direction so as to control the sound emission direction of the speaker so that the information on the intensity is maximized. The acoustic device according to any one of the above. A test sound generator that causes the speaker to generate a test sound;
When the sound emission direction control unit controls the sound emission direction of the speaker vertically upward, the sound collection timing of the reflected sound from the ceiling of the test sound collected at the speaker position, the sound generation timing of the test sound, From, the ceiling distance output unit that outputs information on the distance between the speaker and the ceiling,
When the sound emission direction control unit controls the sound emission direction of the speaker to the listening position of the user, the sound collection timing of the test sound collected at the listening position, and the sound generation timing of the generated test sound From, listening position distance output unit for outputting information on the distance between the speaker and the listening position,
And having
In the case where the determination unit determines that the format is a format that uses ceiling reflected sound,
The sound emission direction control unit sets a sound emission direction of the speaker based on an output of the ceiling distance output unit and an output of the listening position distance output unit. The acoustic device described in 1.