JP7410086B2 - sound equipment - Google Patents

Description

The present invention relates to an audio device.

Utility Model Registration No. 3216709 (hereinafter referred to as "Patent Document 1") describes a microphone sound box integrated device that includes a main sound chamber and a microphone assembly connected to the main sound chamber. In this device, a connecting rod is fixed to the outer wall of the main sound chamber. This connecting rod is used as a handle that can be easily caught by the user.

Utility model registration No. 3216709 ([0027], [0035])

According to the acoustic device described in Patent Document 1, the microphone section and the speaker section can be integrated and carried. Therefore, even if the facility is not equipped with sound equipment, it is possible to perform karaoke with the family at home (see [0004] of Patent Document 1), for example. However, there may be cases where it is desired to spread the sound to a large number of people in a wider place.

One object of the present invention is to provide an acoustic device that can diffuse sound.

An audio device according to one solving means of the present invention includes a housing, a microphone section, and a speaker section. It is preferable that the microphone section is provided above the housing. It is preferable that the speaker section is provided below the housing. Preferably, the speaker section includes a first speaker and a second speaker. Preferably, the first speaker is provided in the casing so as to output audio toward the bottom of the device. It is preferable that the second speaker is provided in the casing so as to output audio toward the side of the device.
Preferably, a first space is formed behind the first speaker. Preferably, a second space is formed behind the second speaker. It is preferable that the first space and the second space are partitioned such that the second space surrounds the first space.
Preferably, the housing has a central axis. Preferably, the speaker section includes a third speaker. It is preferable that the third speaker is provided in the casing so as to output audio toward the side of the device. It is preferable that the second speaker and the third speaker are provided asymmetrically with respect to the central axis. It is preferable that the distance of the second speaker from the central axis is different from the distance of the third speaker from the central axis.
It is preferable that the speaker section has a truncated conical box. Preferably, the box has a first opening and a second opening. Preferably, the first opening is formed on a lower surface of the box. Preferably, the second opening is formed on a side surface of the box. Preferably, the first and second speakers are provided in the box so as to be exposed through the first and second openings, respectively.
Preferably, the acoustic device includes a buffer member. It is preferable that the casing has a first room, a second room, and a third room between the first room and the second room. It is preferable that the microphone section is attached to the first room. It is preferable that the speaker section is attached to the second room. It is preferable that a mold is formed in the second chamber on the third chamber side. It is preferable that the buffer member covers a side of the microphone section of the speaker section. It is preferable that the speaker section is fitted into the mold via the buffer member.
Preferably, the acoustic device includes a first enclosing member and a second enclosing member. Preferably, the first enclosing member is provided to surround the first speaker. Preferably, the second enclosing member is provided to surround the second speaker.
Preferably, the acoustic device includes a holder member. It is preferable that the holder member covers the speaker section side of the microphone section. Preferably, a gap is formed between the holder member and the housing.

According to the acoustic device according to one solving means of the present invention, it is possible to diffuse the sound.

FIG. 1 is a perspective view of an audio device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the acoustic device shown in FIG. 1. FIG. 3 is an exploded perspective view of the speaker section shown in FIG. 2. FIG. 2 is a sectional view of the acoustic device shown in FIG. 1. FIG. 4 is an exploded perspective view of a main part of the speaker section shown in FIG. 3. FIG.

In the following embodiments according to the present invention, members having the same functions are denoted by the same reference numerals in all the figures, and repeated explanation thereof will be omitted. Furthermore, the number of constituent elements (including numbers, numerical values, amounts, ranges, etc.) shall not be limited to a specific number unless otherwise specified or in principle clearly limited to a specific number. It does not have to be a specific number, and may be more than or less than a certain number. Furthermore, when referring to the shape of a component, etc., it shall include anything that substantially approximates or resembles that shape, etc., unless specifically specified or if it is clearly considered otherwise in principle. .

In the embodiment according to the present invention, as an example of an audio device, a mobile type device 10 is attached to a housing 11 so that a microphone section 40 and a speaker section 50 are integrated, with reference to FIGS. 1 to 5. explain. In this embodiment, for convenience of explanation of the positional relationship of each part, when the device 10 is arranged in an xyz spatial coordinate system, the x-axis direction and the y-axis direction are the horizontal direction, and the z-axis direction is the vertical direction (vertical direction). . Further, "parallel directions" include substantially parallel directions, and "orthogonal directions" include substantially orthogonal directions. Note that it goes without saying that the device 10 can be used regardless of the vertical direction or horizontal direction in the description.

The device 10 includes a housing 11. The housing 11 has, for example, a rod shape, has an upper end 12 (one end) and a lower end 13 (the other end), and extends from the upper end 12 to the lower end 13. In the figure, the first direction in which the housing 11 extends is parallel to the z-axis direction, and the second direction orthogonal to the first direction is the x-axis direction or the y-axis direction.

The housing 11 has a first chamber 21 on the upper end 12 side, a second chamber 22 on the lower end 13 side, and a third chamber 23 between the first chamber 21 and the second chamber 22. An opening that opens the first chamber 21 is formed in the upper end 12 of the housing 11 . The microphone section 40 is attached so as to enter the first room 21 from the opening of the upper end 12. Furthermore, an opening that opens the second chamber 22 is formed at the lower end 13 of the casing 11 . The speaker section 50 is installed so as to enter the second chamber 22 from the opening of the lower end 13.

In this way, the device 10 includes the microphone section 40. The microphone section 40 is provided on the upper side of the housing 11 (on the upper end 12 side). More specifically, a microphone section 40 is attached to the first room 21. As the microphone section 40, for example, a unidirectional dynamic type or condenser type microphone can be used.

The device 10 also includes a microphone cover 40A. The microphone cover 40A protects the microphone section 40 and has a portion formed in a net shape (the mesh is omitted in FIG. 1 etc.) so that the user's voice can be transmitted to the microphone section 40. The microphone cover 40A surrounds the microphone section 40 and is attached to the upper end 12 of the housing 11. Note that, in order to suppress the influence of wind pressure, it is preferable to provide, for example, an elastic member, sponge, felt, nonwoven fabric, sponge, resin, etc. inside the microphone cover 40A.

The device 10 also includes a speaker section 50. The speaker section 50 is provided below the housing 11 (on the lower end 13 side). More specifically, the speaker section 50 is attached to the second room 22. As the speaker section 50, for example, a cone-shaped speaker can be used.

The device 10 also includes a speaker cover 50A. The speaker cover 50A is attached to the lower end 13 of the housing 11 while enclosing the lower part of the speaker unit 50 (the lower end 56 of the box 54), and protects the speaker unit 50 (first speaker 51 to be described later) from external impact. ing. The speaker cover 50A is configured in a bowl shape. As shown in FIG. 1, the speaker cover 50A has a plurality of holes 70 formed radially from the center at the bottom and a plurality of openings 71 formed around the holes. Thereby, the sound from the speaker section 50 can be diffused. Further, the size of one opening 71 is larger than that of one hole 70. The speaker cover 50A is provided to cover the lower end 13 (opening) of the housing 11, and the opening 71 can adjust the air pressure inside and outside the housing 11 (preventing howling).

The device 10 also includes a speaker cover 50B. The speaker cover 50B protects the speaker section 50 (a second speaker 52 and a third speaker 53, which will be described later), and has a mesh shape (the mesh is omitted in FIG. 1 etc.) so that the sound from the speaker section 50 is diffused. is formed. The side parts (second speaker 52, third speaker 53) of the speaker section 50B are exposed from the openings 28 and 29 of the housing 11. The speaker cover 50B is attached to cover the openings 28 and 29 (see FIG. 2) formed on the side surface of the housing 11.

The device 10 also includes a control section 24 and a power source 25, as shown in FIG. 4 (a sectional view taken through the central axis 11a in the xz plane). A control unit 24, a power source 25, and the like are installed in the third room 23. The control section 24 (control board) is electrically connected to the microphone section 40, the speaker section 50, and the power supply 25 (wiring etc. are not shown). The power source 25 is, for example, a lithium ion battery, and is configured to be rechargeable via an AC adapter. The control unit 24 can control the power supply, amplify the audio signal input through the microphone unit 40, and transmit the amplified audio signal to the speaker unit 50.

The device 10 also includes a power button 30 for switching on/off, an output volume knob 31 for the speaker unit 50, a buzzer button 32, and a whistle button 33. These are exposed from the housing 11 and are operated by the user. The device 10 also includes a strap ring 35. For example, a user can wear the device 10 around their neck by threading a strap through the strap ring 35.

The casing 11 has a diameter reduced so that a portion 14 (constriction 14) closer to the upper end 12 than the lower end 13 is constricted, and the diameter is increased to widen from the constriction 14 toward the lower end 13. This makes it easier for users with different hand sizes to grip the housing 11. Furthermore, by attaching the speaker section 50 to a portion that widens toward the lower end 13, the sound can be further diffused.

According to such a device 10, the user can grasp the housing 11 during use. Then, when the user speaks, the microphone section 40 picks up the voice (passed through the microphone cover 40A), amplifies the voice signal, and outputs the voice (passed through the speaker covers 50A and 50B) from the speaker section 50. Diffusion, that is, the sound can be heard widely.

Further, in the device 10, the microphone section 40 and the speaker section 50 are attached to the housing 11 and integrated, but the third room 23 is provided to isolate the microphone section 40 and the speaker section 50. Thereby, it is possible to suppress the occurrence of howling (feedback) that occurs when a portion of the sound output from the speaker section 50 is input to the microphone section 40.

The speaker section 50 has a first speaker 51, as shown in FIG. The first speaker 51 is provided in the housing 11 so that audio is output downward from the device 10. More specifically, the first speaker 51 has the audio output outlet 51a facing up, and the first speaker 51 is connected to the lower end 13 of the housing 11 with the audio output outlet 51a facing downward (negative in the z-axis direction, downward in the vertical direction). (bottom). That is, the front side of the first speaker 51 is exposed at the bottom surface of the housing 11. According to this, when the user uses the device 10, the sound can be diffused downward from the bottom (center axis 11a and its surroundings) of the device 10 (casing 11).

Furthermore, the speaker section 50 includes a second speaker 52, as shown in FIG. The second speaker 52 is provided in the housing 11 so that audio is output from the device 10 laterally. More specifically, the second speaker 52 faces the side of the audio output outlet 52a and faces toward the side of the housing 11 (negative direction in the x-axis direction, leftward in the horizontal direction). It is set in. That is, the front side of the second speaker 52 is exposed on the side surface of the housing 11. According to this, when the user uses the device, it is possible to diffuse the sound from side to side of the device 10 (casing 11). Therefore, according to the speaker section 50 having the first speaker 51 and the second speaker 52, the sound can be widely diffused downward and to the sides of the housing 11.

Here, as shown in FIG. 4, a first space 61 is formed behind the first speaker 51, and a second space 62 is formed behind the second speaker 52. In the speaker section 50, a first space 61 and a second space 62 are partitioned so that the second space 62 surrounds the first space 61. Note that the first space 61 and the second space 62 are formed in the second room 22 of the housing 11.

Here, the speaker section 50 has a box 63 (enclosure) that forms a closed space behind the first speaker 51. As shown in FIG. 5, the box 63 includes a ring member 64 and a cup member 65, and is configured by combining them. According to the box 63, the front side (outlet 51a) of the first speaker 51 is exposed through the opening of the ring member 64, and the back side of the first speaker 51 is surrounded by the cup member 65.

A second space 62 is formed to surround (accommodate) this box 63. That is, the first space 61 and the second space 62 are partitioned by the box 63. As a result, it is possible to prevent the output from the first speaker 51 and the output from the second speaker 52 from interfering with each other, so that the sound can be widely diffused downward and to the sides of the housing 11 by each of them. I can do it. Note that the first space 61 and the second space 62 can be partitioned by providing a wall in the second room 22 instead of the box 63.

Furthermore, the speaker section 50 includes a third speaker 53, as shown in FIG. The third speaker 53 is provided in the housing 11 so that audio is output from the device 10 laterally. More specifically, the third speaker 53 faces the side of the audio output outlet 53a and faces toward the side of the housing 11 (positive direction in the x-axis direction, rightward in the horizontal direction). It is set in. That is, the third speaker 53 is provided so that its front surface is exposed on the side surface of the housing 11. According to this, when the user uses the device, the sound can be widely diffused laterally along the direction in which the device 10 (casing 11) extends (z-axis direction, vertical direction).

Note that a second space 62 shared with the second speaker 52 is formed behind the third speaker 53. The second space 62 is formed in the second room 22, but a box (enclosure) may be provided surrounding the back of each of the second speaker 52 and the third speaker 53 to form a sealed space.

The first speaker 51 has, for example, a cone (diaphragm) whose outlet 51a (output side opening) is circular when viewed from the bottom, and a vibration source including a voice coil. It vibrates and outputs sound (for example, outputs 5 watts). Further, the second speaker 52 has, for example, a cone whose exit 52a is elliptical in side view and a vibration source including a voice coil, and outputs sound by passing a current through the voice coil to vibrate the cone. (e.g., 5 watts output). The second speaker 52 is provided so that one longitudinal side of the outlet 52a is on the upper side and the other longitudinal side is on the lower side.

Further, the third speaker 53 has, for example, a cone whose exit 53a is elliptical in side view and a vibration source including a voice coil, and outputs sound by passing a current through the voice coil to vibrate the cone. (e.g., 5 watts output). The third speaker 53 is provided so that one longitudinal side of the outlet 53a is on the upper side and the other longitudinal side is on the lower side. As this third speaker 53, one having the same shape and output as the second speaker 52 can be used. The second speaker 52 and the third speaker 53 are provided facing oppositely to each other. In FIG. 4, the outlet 52a of the second speaker 52 is oriented in the negative direction of the x-axis, and the outlet 53a of the third speaker 53 is oriented in the positive direction of the x-axis.

By the way, the housing 11 has a central axis 11a (in FIG. 4, the direction in which the central axis 11a extends is included), and is configured, for example, in a rod shape. This central axis 11a passes through the first speaker 51 (in FIG. 4, the center of the outlet 51a). Further, the second speaker 52 (centered on the outlet 52a in FIG. 4) and the third speaker 53 (centered on the outlet 53a in FIG. 4) are asymmetrical with respect to the central axis 11a.

The third speaker 53 has a different distance from the reference (for example, the outlet 51a of the first speaker 51) on the lower end 13 side of the housing 11 so as to be asymmetrical from the second speaker 52 with respect to the central axis 11a. More specifically, in the central axis 11a direction (extending direction of the housing 11), the distance z1 between the center of the outlet 53a of the third speaker 53 and the center of the outlet 51a of the first speaker 51 is equal to It is longer than the distance z2 between the center of the outlet 52a and the center of the outlet 51a of the first speaker 51. According to this, even if the housing 11 is rod-shaped, a plurality of speakers (second speaker 52 and third speaker 53) can be provided along the extending direction. It is possible to spread the sound widely.

Further, the third speaker 53 is different from the second speaker 52 in distance from the center axis 11a so as to be asymmetrical with respect to the second speaker 52 with respect to the center axis 11a. More specifically, the distance x1 between the center of the outlet 53a of the third speaker 53 and the center axis 11a is shorter than the distance x2 between the center of the outlet 52a of the second speaker 52 and the center axis 11a. According to this, for example, when the user uses the device, the sound can be widely diffused to the sides of the housing.

It is also conceivable to make the distance z1 and the distance z2 equal, and the distance x1 and the distance x2, and make the second speaker 52 and the third speaker 53 symmetrical about the central axis 11a. Here, the device 10 is also provided with a first speaker 51 that outputs audio to the lower part of the housing 11. Therefore, in the device 10, in the direction of the central axis 11a, the second speaker 52 which is close to the first speaker 51 (distance z2) is moved away from the central axis 11a (distance x2), and the third speaker 53 which is far away (distance z1) is moved from the central axis 11a. is brought close to the central axis 11a (distance x1), and the second speaker 52 and the third speaker 53 are made asymmetrical with respect to the central axis 11a.

Further, the speaker section 50 has a box 54 (enclosure). This box 54 is fixedly housed in the housing 11, that is, the speaker section 50 is provided in the housing 11. Box 54 has an upper end 55 and a lower end 56. More specifically, the box 54 is configured in a truncated cone shape so that the diameter increases from an upper end 55 toward a lower end 56. Further, the box 54 is configured to be hollow, and the inside is closed at the upper end 55 and the inside is open at the lower end 56.

Box 54 has a first opening 57 . The first opening 57 is formed on the surface of the lower end 56 of the box 54. From this first opening 57, the front side (outlet 51a) of the first speaker 51 is exposed. In this embodiment, the first speaker 51 is provided in a box 63 that surrounds the back of the first speaker 51 with a space formed therein. The first opening 57 exposes the front side of the first speaker 51 and is closed by the box 63.

The box 54 also has a second opening 58. The second opening 58 is formed in the side surface of the box 54. From this second opening 58, the front side (outlet 52a) of the second speaker 52 is exposed. The second opening 58 is closed by the second speaker 52, exposing the front side of the second speaker 52.

Furthermore, the box 54 has a third opening 59 . The third opening 59 is formed on the side surface of the box 54. From this third opening 59, the front side (outlet 53a) of the third speaker 53 is exposed. The third opening 59 is closed by the third speaker 53, exposing the front side of the third speaker 53.

In this manner, the device 10 is provided with a speaker section 50 having a truncated conical box 54 with an upper end 55 facing toward the microphone section 40 . The box 54 is provided with a third speaker 53, a second speaker 52, and a first speaker 51 in this order from the upper end 55 side to the lower end 56 side. According to the speaker unit 50 having such a truncated cone-shaped box 54, sound can be diffused along the height direction of the box 54.

The device 10 also includes a first enclosing member 15 . The first enclosing member 15 is provided to surround the first speaker 51. More specifically, since the outlet 51a of the first speaker 51 is exposed from the first opening 57 of the box 54, the ring-shaped first enclosing member 15 is attached to the side of the box 54 around the first opening 57. make contact (adhesion). As the first enclosing member 15, for example, an elastic member, felt, nonwoven fabric, sponge, resin, etc. can be used.

Then, by sandwiching the first enclosing member 15 between the casing 11 and the box 54 so that the first enclosing member 15 contacts the inside of the casing 11 (see FIG. 4), the casing 11 and the box 54 are separated. Vibration propagation between can be suppressed. By suppressing the generation of unnecessary vibrations, it is possible to suppress the generation of howling and diffuse the sound.

The device 10 also includes a second enclosure member 16 . The second enclosing member 16 is provided so as to surround the second speaker 52 and the third speaker 53. More specifically, since the outlet 52a of the second speaker 52 is exposed from the second opening 58 of the box 54, the sheet-like second enclosing member 16 is attached to the side of the box 54 around the second opening 58. , 16 are brought into contact. Further, since the outlet 53a of the third speaker 53 is exposed from the third opening 59 of the box 54, the sheet-like second enclosing members 16, 16 are brought into contact with the side surface of the box 54 around the third opening 59. (glue) As the second enclosing member 16, for example, an elastic member, felt, nonwoven fabric, sponge, resin, etc. can be used. Note that the second enclosing members 16 and 16 are commonly used to surround the second opening 58 and the third opening 59.

By sandwiching the second enclosing member 16 between the casing 11 and the box 54 so that the second enclosing member 16 contacts the inside of the casing 11, vibration propagation between the casing 11 and the box 54 is achieved. can be prevented. By suppressing the generation of unnecessary vibrations, it is possible to suppress the generation of howling and diffuse the sound.

The device 10 also includes a buffer member 17. The buffer member 17 is provided to cover the microphone section 40 side of the speaker section 50. More specifically, the buffer member 17 is brought into contact (adhered) over the surface of the upper end 55 of the box 54 of the speaker section 50 and the side surface of the box 54 around the upper end 55 . As the buffer member 17, for example, an elastic member, felt, nonwoven fabric, sponge, resin, etc. can be used. If the cushioning member 17 is in the form of a circular sheet, the cushioning member 17 can be easily attached from the surface of the upper end 55 to the side surface by making a cut on the outside in the radial direction.

Here, as shown in FIG. 4, a mold 26 is formed in the second chamber 22 of the housing 11 on the third chamber 23 side. More specifically, the mold 26 is formed so that the upper portion (upper end 55 portion) of the speaker portion 50 on the side of the microphone portion 40 is fitted into the mold 26 . Since the buffer member 17 is provided to cover the upper part of the speaker section 50, the speaker section 50 can be easily fitted into the mold 26 via the buffer member 17. By sandwiching the buffer member 17 between the housing 11 and the box 54 so that the buffer member 17 contacts the inside of the housing 11, vibration propagation between the housing 11 and the box 54 can be suppressed. . By suppressing the generation of unnecessary vibrations, it is possible to suppress the generation of howling and diffuse the sound.

The device 10 also includes holder members 18 and 19. As shown in FIG. 4, the holder members 18 and 19 are provided to cover the speaker section 50 side of the microphone section 40. The holder members 18 and 19 can be made of, for example, an elastic member, sponge, felt, nonwoven fabric, resin, or the like.

The holder member 18 has a cylindrical shape, for example, and contacts (adheres) the side surface of the microphone section 40 with the upper end 41 side of the microphone section 40 exposed so that the microphone section 40 can be inserted therein. Further, the holder member 19 has a cylindrical shape, for example, and is in contact (adhesion) with the surface of the lower end 42 of the microphone section 40 so as to cover the speaker section 50 side (lower end 42) of the microphone section 40.

Here, when attaching the microphone section 40 to the housing 11, a gap 20 is formed between the holder member 19 and the housing 11. More specifically, the microphone unit 40 is attached to the first room 21 of the housing 11, but the holder member 19 is separated from the partition 27 that partitions the first room 21 and the third room 23. Thereby, vibration propagation between the housing 11 and the microphone section 40 can be suppressed. By suppressing the generation of unnecessary vibrations, it is possible to suppress the generation of howling and diffuse the sound.

Although the present invention has been specifically described above based on the embodiments, it goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the gist thereof.

In the embodiment described above, the case where two speakers are provided on the side surface of the housing has been described. The present invention is not limited to this, and as a modified example, one or three or more speakers may be provided on the side surface of the housing. According to this, when the user uses the device, the sound can be widely diffused not only downward but also to the sides of the casing.

In the embodiment described above, a case has been described in which the microphone unit picks up the voice when the user speaks, amplifies the voice, and diffuses the voice from the speaker unit. The present invention is not limited to this, and as a modified example, an audio system may be constructed in which a wireless transmission unit (for example, 800 MHz) is provided in a housing together with a control board, and a reception unit is provided in an external speaker. According to this, it is also possible to diffuse the sound from at least one of the speaker section and the external speaker.

In the embodiment described above, a case has been described in which the speakers (second speaker, third speaker) that output audio toward the sides of the device are provided in a truncated cone-shaped box. The present invention is not limited to this, and as a modified example, a speaker may be provided in a cylindrical, polygonal , or other columnar box toward the side of the apparatus.

10: acoustic device, 11: housing, 40: microphone section, 50: speaker section, 51: first speaker, 52: second speaker.

Claims (6)

An audio device comprising a housing, a microphone section, and a speaker section,
the microphone section is provided on the upper side of the housing,
the speaker section is provided on the lower side of the housing,
The speaker section includes a first speaker and a second speaker,
the first speaker is provided at the bottom of the casing so that audio is output from the bottom of the casing toward the bottom of the device;
the second speaker is provided on the side of the housing so that audio is output from the side of the housing toward the side of the device;
The speaker section includes a first box in which a first space is formed behind the first speaker, and a second box in which a second space is formed behind the second speaker,
An acoustic device characterized in that the first box fits into the second box, and the first space and the second space are partitioned. An audio device comprising a housing, a microphone section, and a speaker section,
the microphone section is provided on the upper side of the housing,
the speaker section is provided on the lower side of the housing,
The speaker section includes a first speaker and a second speaker,
the first speaker is provided at the bottom of the casing so that audio is output from the bottom of the casing toward the bottom of the device;
the second speaker is provided on the side of the housing so that audio is output from the side of the housing toward the side of the device;
An acoustic device characterized in that the speaker section has a box, and the first and second speakers are provided in first and second spaces partitioned within the box, respectively. A mold into which an upper part of the speaker part is fitted is formed in the casing,
3. The acoustic device according to claim 1 , further comprising a sheet-like buffer member attached from an end surface to a side surface of the upper part of the speaker part and sandwiched between the mold of the housing and the upper part of the speaker part. The acoustic device according to any one of claims 1 to 3 , further comprising a surrounding member provided around the output port of the second speaker and sandwiched between the housing and the speaker section. The casing is configured to have a central axis,
the speaker section has a third speaker,
the third speaker is provided on the side of the housing so that audio is output from the side of the housing toward the side of the device;
The central axis passes through the center of the first speaker,
The second speaker and the third speaker are provided asymmetrically with respect to the central axis,
The acoustic device according to any one of claims 1 to 4, wherein a distance of the second speaker from the central axis and a distance of the third speaker from the central axis are different. 5. In the central axis direction, a distance between an exit center of the third speaker and an exit center of the first speaker is longer than a distance between an exit center of the second speaker and an exit center of the first speaker. The described sound device.

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