JP2006157857A - Acoustic system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an acoustic system capable of performing sound field control corresponding to the state of connecting a plurality of speaker units. <P>SOLUTION: A system upstream side speaker unit 30a detects a connecting hole thereof to which a connecting rod 40a is connected. Detected connection information is transmitted to a downstream side speaker unit 30b. The downstream side speaker unit 30b detects a connecting hole thereof to which the connecting rod 40a is connected and detects its own location, with respect to the upstream side speaker unit 30a, from the connection information from the upstream side speaker unit 30a. The downstream side speaker unit 30b then generates a directivity control instruction based on a result of the detection. The speaker units 30a and 30b emit audio signals on which directivity control is thus performed, thereby accomplishing a desired sound field. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  According to the present invention, a plurality of speaker units each formed by arranging a plurality of speakers are connected at a predetermined interval and a predetermined angle at a connection portion, and a desired sound field is formed by sound signals emitted from the respective speakers. It relates to an acoustic system.

  Conventionally, there is a speaker system in which a plurality of speakers are arranged and connected in a predetermined position and posture relationship to form a predetermined reproduction space. As an example, speakers are installed or incorporated in walls or partitions that form the reproduction space. Several speaker systems have been devised.

Patent Document 1 discloses a panel type speaker in which a plurality of planar speakers are attached to a flexible base member. Further, Patent Document 2 discloses a partition in which a speaker is installed and which can be bent like a folding screen.
JP 2000-236595 A Utility Model No. 3043336

  However, conventional partitions and panel type speakers have the following problems to be solved.

  The panel type speaker of Patent Document 1 has a very high degree of freedom in layout when the speaker is used as a partition by installing the speaker on a flexible member. Since the same audio signal is given even if it changes, the assumed sound field cannot be reproduced according to the changed shape, and the degree of freedom in forming the sound field is reduced.

  In the partition of Patent Document 2, a speaker is installed inside, and each partition panel is rotatably connected, so that a sound field can be independently formed on both sides of the partition with a free layout. However, fine sound field control other than forming independent sound fields on both sides of the partition, for example, forming multiple independent sound fields on one side of the partition, or changing the sound field depending on the shape of the partition. could not. That is, only one sound field can be formed in each direction.

  Accordingly, an object of the present invention is to provide a sound system that has a structure in which a plurality of speaker units are connected in a predetermined position and posture relationship, and can perform sound field control according to the connection state of the plurality of speaker units. There is to do.

  The acoustic system of the present invention detects a connection posture of a plurality of speaker units each having a plurality of speakers arranged therein, a connection unit that connects the plurality of speaker units, and an adjacent speaker unit that is connected by the connection unit. It is characterized by comprising connection attitude detection means and control means for setting audio signals for a plurality of speaker units based on the set sound field and the detected connection attitude.

  In this configuration, when a plurality of speaker units connected by the connection means are arranged in a predetermined shape, the connection attitude detection means is set by all connection means, that is, adjacent speaker units connected by the connection means The distance between each other and the solid angle formed are detected. The control means detects the installation relationship of the plurality of speaker units by acquiring the connection attitudes of all these connection portions from the connection attitude detection means. The control means performs delay processing and amplitude processing on the audio signal to each speaker unit based on the detection result and the sound field set corresponding to the installation relationship of the plurality of speaker units. A plurality of speakers arranged in each speaker unit emit the audio signals subjected to the delay processing and the amplitude processing. The sound signal to be emitted has a predetermined delay relationship and amplitude relationship, whereby a predetermined directivity (sound field) is realized.

  The acoustic system according to the present invention further includes audio signal input means for inputting audio signals of a plurality of channels and detecting the number of channels, and the control means determines the number of channels, the set sound field, and the detected connection posture. On the basis of this, it is characterized in that an audio signal is set for each of a plurality of speaker units.

  In this configuration, if multiple channels of audio signals are input in addition to the setting conditions described above, the delay processing and amplitude processing are set by the control means so that the audio signals of each channel do not interfere with each other. Independent directivity is realized.

  In addition, the acoustic system of the present invention has two conductor members so that the extending directions of the two conductor members substantially coincide with each other and the length formed by the two conductor members is variable. The connecting means includes a conductor connecting portion for connecting the two conductor members and a length detecting means for detecting a length formed by the two conductor members, and the connection posture detecting means detects the detected length. The connection posture is detected by the above.

  In this configuration, the connecting means is formed so as to connect the two conductor members so that the extending directions thereof coincide with each other. Further, the connection means includes length detection means for detecting the length formed by the two conductor members, and outputs the detected length to the connection posture detection means. The connection posture detection means detects the connection interval between the speakers connected by the connection means based on the detected length.

  Also, the acoustic system of the present invention is a rotation angle detecting means for connecting two conductor members so as to be rotatable about the extending direction of the two conductor members at the conductor connecting portion and detecting the rotation angle of the conductor connecting portion. Is provided in the connection means, and the connection attitude detection means detects the connection attitude based on the detected rotation angle.

  In this configuration, the connecting means is formed so as to connect the two conductor members rotatably without changing the extending direction. The connection means includes rotation angle detection means for detecting a relative rotation angle between the two conductor members, and outputs the detected rotation angle to the connection posture detection means. The connection attitude detection means detects the connection attitude of the speakers connected by the connection means based on the detected rotation angle.

  Further, the acoustic system of the present invention comprises a connecting means including a bending angle detecting means for connecting two conductor members so as to be bent at the conductor connecting portion and detecting a bending angle of the conductor connecting portion, and the connection posture detecting means comprises: The connection posture is detected based on the detected bending angle.

  In this configuration, the connecting means is formed so as to be able to bend the two conductor members at a predetermined angle with respect to the extending direction. The connecting means includes bending angle detection means for detecting the bending angle of the two conductor members, and outputs the detected bending angle to the connection posture detection means. The connection attitude detection means detects the connection attitude of the speakers connected by the connection means based on the detected bending angle.

  The acoustic system of the present invention also has switching means for switching whether the speaker functions as a microphone or a speaker, and directing of an audio signal coming from a sound signal collected by the speaker switched to the microphone by the switching means. A sound collection directivity detection means for detecting the sound, and the connection posture detection means determines the connection posture based on the detection result of the sound collection directivity detection means by sound emission and sound collection performed between adjacent speaker units. It is characterized by detecting.

  In this configuration, one of the adjacent speaker units functions as a speaker and the other functions as a microphone by the switching means. Then, the sound signal emitted from the speaker unit functioning as a speaker is collected by the speaker unit functioning as a microphone. At this time, depending on the distance between adjacent speaker units and the angle formed, different sound collection characteristics can be obtained even if the same audio signal is emitted. That is, the directivity (delay relationship) of the collected audio signal changes depending on the distance between the speaker units and the angle formed. By storing the directivity of the collected sound signal and the rotation angle in association with each other, the connection posture detection means is determined from the distance and the angle formed by the directivity detected by the sound collection directivity detection means. The connection posture which becomes is detected. Thereby, the installation shape of a plurality of speaker units is detected.

  According to the present invention, a plurality of speaker units are connected in a predetermined posture relationship, and a sound field is formed according to each connection posture. Therefore, it is possible to realize an acoustic system that performs optimal directivity control according to the above, that is, forms a desired sound field.

An acoustic system according to a first embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a speaker device in which planar speaker units are arranged and connected will be described as an example. And this embodiment demonstrates the acoustic system which detects the rotation angle between the two planar speaker units connected by a connection part as a connection attitude | position.
1A and 1B are external perspective views of a speaker device 1 used in the acoustic system of the present embodiment. FIG. 1A shows a state in which a connection portion 11 is bent at a substantially right angle (90 ° or 270 °), and FIG. (C) shows the state opened flat.
FIG. 2 is a schematic diagram showing the configuration of the flat speaker unit 10 (10b) constituting the speaker device 1.
FIG. 3 is an enlarged exploded perspective view and a plan view showing a connecting portion 11 (11bc) of adjacent flat speaker units.
In the following description, the rotation angle θ is simply expressed as a rotation angle when no plane speaker unit is specified.

  As shown in FIG. 1, the speaker device 1 of the acoustic system includes a plurality of flat speaker units 10a to 10j each having a shape shown in FIG. 2, and adjacent flat speaker units among the flat speaker units 10a to 10j. It has connection parts 11ab-11ij connected so that rotation is possible. And the speaker apparatus 1 is set to a predetermined | prescribed shape by rotating these connection parts 11ab-11ij so that it may become the predetermined | prescribed rotation angle (theta). For example, when the rotation angles θ of the connecting portions 11ab to 11ij are alternately set to 0 ° or 360 °, a folded shape as shown in FIG. 1B is obtained, and all the rotation angles θ are set to 180 °. Thus, the shape is almost completely flat (flat) as shown in FIG. Further, by alternately setting the connecting portions 11ab to 11ij to 90 ° or 270 °, the shape in plan view as shown in FIG. 1A becomes a zigzag shape. Then, by installing the speaker device having the shape as described above, it can be used as a partition of the room.

  The flat speaker units 10a to 10j constituting the speaker device 1 are provided with a plurality of flat speakers 101 that can be independently driven in a substantially flat casing 100. A plurality of these flat speakers 101 are arranged in a predetermined number in the vertical and horizontal directions. For example, in the example of this embodiment, a total of 21 flat speakers 101 are arranged and installed, with seven in the horizontal direction (short direction of the flat plate surface) and three in the vertical direction (longitudinal direction of the flat plate surface). Yes. Further, the flat speaker unit 10 includes connection protrusions 102 that constitute the connection portions 11ab to 11ij, respectively, at both ends of the flat speaker 101 in the horizontal arrangement direction, that is, at the upper end corners. For example, the flat speaker unit 10b shown in FIG. 2 includes connection protrusions 102ab and 102bc at the upper corner.

  Each of the connection portions 11ab to 11ij includes a connection protrusion 102 of the above-described flat speaker unit 10 and a connection member 110 including an insertion hole 111 correlated therewith. Then, the adjacent flat speaker units 10 are rotatably connected to each other by the adjacent connecting projections 102 of the adjacent flat speaker units 10 being rotatably inserted into the insertion holes 111 of the connection member 110. The For example, as shown in FIG. 3, in the adjacent flat speaker units 10 b and 10 c, the connection protrusions 102 bc installed in the respective flat speaker units 10 b and 10 c are inserted into the two insertion holes 111 bc of the connection member 110. The flat speaker units 10b and 10c are rotatably connected by being respectively inserted. At this time, the shape of the connection member 110 (insertion hole 111bc) and the shape of the connection protrusion 102bc are set so that the connection portion 11bc rotates approximately 360 °.

Next, an acoustic system using the above-described speaker device 1 will be described.
FIG. 4 is a block diagram showing a schematic configuration of the acoustic system of the present embodiment.

  The acoustic system includes the above-described speaker device 1, a CPU 200 that controls the entire system, a memory 201 that is connected to the CPU 200, a DSP 202, and the flat speaker units 101 a to 10 j of the speaker device 1. A plurality of driving units 203 that are driven in the same manner, a rotation angle detection unit 204 that detects the rotation angle θ of the connection units 11ab to 11ij, and an audio signal input unit 205 that converts an input audio signal into a digital audio signal. With.

  The audio signal input unit 205 converts the input analog audio signal into a digital audio signal and outputs it to the DSP 202. At this time, if audio signals of a plurality of channels are input, the audio signals of the respective channels are converted into a digital format and output to the DSP 202. Also, the audio signal input unit 205 detects the number of channels of the input audio signal and outputs it to the CPU 200. Here, as a method of detecting the number of channels, an input terminal with a switch is provided, and it is detected that the switch is turned on when a signal line is connected. If the signal input to the audio signal input unit 205 is a digital signal, channel number data included in the input digital audio signal is read and detected. When the signal input to the audio signal input unit 205 is a digital signal, the input audio signal is directly output to the DSP 202 without performing A / D conversion.

The rotation angle detection unit 204 detects the rotation angles θ _{ab to} θ _ij of the connection units 11ab to 11ij and outputs them to the CPU 200. The rotation angle detection unit 204 is, for example, an encoder (not shown) installed in each of the connection units 11ab to 11ij and a rotation angle calculation unit that calculates the rotation angle θ from pulse count information from the encoder (see FIG. (Not shown).

The CPU 200 reads the signal control parameters based on the rotation angles θ _{ab to} θ _ij of the respective connection units 11ab to 11ij input from the rotation angle detection unit 204 and the number of channels input from the audio signal input unit 205. To the DSP 202. At this time, if an input for specifying the output direction (directivity) of the audio signal of each channel is input from the operation input unit such as a remote controller, the delay parameter and the amplitude parameter are set corresponding to each channel accordingly.

FIG. 5 is a schematic diagram showing data stored in the memory 201.
As shown in FIG. 5, the memory 201, and angular parameters of the rotation angle theta _ab through? _Ij, and a signal channel number N _B, and the signal control parameters to achieve these parameters are stored. The signal control parameter includes a delay control parameter and an amplitude control parameter. For example, the angular parameters alpha ₁ to? ₉ of the rotation angle theta _ab through? _Ij, signal the number of channels N _B is "1", the flat delay control of the audio signal to be input to the speaker 101 parameter D ₁₁₁ to D _11n ( n is the number of flat speakers) and amplitude control parameters A _{111 to} A _11n (n is the number of flat speakers) of audio signals input to each flat speaker 101 are stored in association with each other. The memory 201 stores signal control parameters for each rotation angle pattern and the number of signal channels corresponding to the arrangement pattern to be used. For example, when storing six arrangement patterns as shown in FIGS. 6A to 6F, signal control parameters corresponding to the rotation angle and the number of signal channels for each of the six patterns are stored. .

  The DSP 202 generates an audio signal for each drive unit 203 to be output with respect to the audio signal input from the audio signal input unit 205. At this time, the DSP 202 performs delay control and amplitude control based on signal control parameters (delay parameter and amplitude parameter) input from the CPU 200 with respect to the audio signal to each drive unit 203. Thus, the audio signal subjected to the delay control and the amplitude control for each driving unit 203 is output to the corresponding driving unit 203.

  The driving unit 203 performs DA conversion on the input digital audio signal and amplifies it, and outputs the amplified audio signal to the flat speaker 101 arranged in the flat speaker units 10a to 10j.

  The flat speaker 101 arranged in the flat speaker units 10a to 10j emits an audio signal subjected to each signal processing. Thereby, the delay and amplitude of the sound emitted from each flat speaker 101 have a predetermined relationship, and a desired directivity can be obtained, that is, a desired sound field can be formed.

  By adopting such a configuration, an acoustic system in which a plurality of flat speaker units are rotatably connected to form a sound field according to the rotation angle of the connecting portion, that is, the installation positional relationship of each flat speaker unit. can do. At this time, if the input audio signal has a plurality of channels, an independent sound field can be formed for each channel based on the number of channels and the installation positional relationship of the planar speaker units.

  In the above description, the parameters stored in the memory are read and signal control is performed. However, it is also possible to input these parameters using an operation input unit (such as a remote controller) and perform signal processing. Thereby, it is possible to form a sound field with many variations.

  Next, a specific installation positional relationship of the flat speaker unit and sound field control will be described with reference to FIG.

FIG. 6 is a conceptual diagram showing a specific arrangement of a flat speaker unit and a sound field to be formed, and is a view of the flat speaker unit as viewed from above. 6A to 6F show different cases (arrangement states).
In the description of FIG. 6 below, the rotation angle θ is such that the left planar speaker unit is folded to the front (audio output direction) side with respect to the right planar speaker unit when the adjacent planar speaker units are viewed from above. The state where the right flat speaker unit is folded to the front side with respect to the left flat speaker unit is 360 °. The direction in which the left planar speaker unit rotates clockwise as viewed from above with respect to the right planar speaker unit is the direction in which the rotation angle increases.

(A) When a flat speaker unit is arranged flat and a three-channel audio signal is input (FIG. 6A)
When the flat speaker units 10a to 10j are arranged flat as shown in FIG. 6A, the rotation angle detection unit 204 has the rotation angles θ _{ab to} θ _{ij of} all the connection portions 11ab to 11ij being 180 °. Is output to the CPU 200. On the other hand, the audio signal input unit 205 detects the number of channels N _B = “3” of the input audio signal and outputs it to the CPU 200. Based on these detection results, the CPU 200 forms directivity for emitting sound signals of the respective channels in three directions parallel to each other in the front direction of the flat speaker unit group 50 including the flat speaker units 10a to 10j. Signal control parameters (delay control parameter, amplitude control parameter) are read and output to the DSP 202.

  The DSP 202 performs delay processing and amplitude processing on the audio signal output to each flat speaker 101 (drive unit 203) according to this signal control parameter. Specifically, each flat speaker 101 constituting the local speaker unit group 51a composed of the flat speaker units 10a to 10c is independently subjected to delay processing and amplitude processing, whereby the first channel audio signal is converted to the front direction of the speaker device 1. The sound signals of the second channel are processed in the front direction of the speaker device 1 by delaying and amplitude processing each of the flat speakers 101 constituting the local speaker unit group 51b including the flat speaker units 10d to 10g. The sound signals of the third channel are processed in the front direction of the speaker device 1 by delaying and amplitude processing each of the flat speakers 101 constituting the local speaker unit group 51c composed of the flat speaker units 10h to 10j. Sound is emitted. As a result, three independent sound fields (reproduction spaces) corresponding to the three channels can be formed in the front direction of the flat speaker unit group 50. Note that which local speaker unit group 51a to 51c outputs the three channels can be set by an operation input unit such as a remote controller. Further, the input audio signal is one channel, and it can be converted into a three-channel audio signal to form three independent sound fields.

(B) When the flat speaker unit is divided into three groups, the groups at both ends are arranged in a shape bent in the front direction of the speaker device (in the reproduction space direction formed by the acoustic system), and a three-channel audio signal is input (Fig. 6 (b))
When the planar speaker units 10a to 10j are arranged as shown in FIG. 6B, the rotation angle detection unit 204 has the rotation angles θ _cd and θ _gh of the connection portions 11cd and 11gh larger than 90 ° and 180 °. The rotation angle θ of the other connecting portion is detected to be 180 °, and is output to the CPU 200. On the other hand, the audio signal input unit 205 detects the number of channels N _B = “3” of the input audio signal and outputs it to the CPU 200. Based on these detection results, the CPU 200 determines the front direction of the local speaker unit group 52a including the flat speaker units 10a to 10c, the front direction of the local speaker unit group 52b including the flat speaker units 10d to 10g, and the flat speaker units 10h to 10j. Signal control parameters (delay control parameter, amplitude control parameter) that form directivity for emitting independent three-channel audio signals are read out in the front direction of the local speaker unit group 52 c and output to the DSP 202.

  The DSP 202 performs delay processing and amplitude processing on the audio signal output to each flat speaker 101 (each drive unit 203) according to this signal control parameter. Specifically, the local speaker unit group 52a including the planar speaker units 10a to 10c emits the sound signal of the first channel in the front direction of the local speaker unit group 52a, and the local speaker unit including the planar speaker units 10d to 10g. The group 52b emits the audio signal of the second channel in the front direction of the local speaker unit group 52b, and the local speaker unit group 52c composed of the planar speaker units 10h to 10j receives the audio signal of the third channel of the local speaker unit group 52c. Sound is emitted in the front direction. Thereby, three independent sound fields corresponding to the three channels can be formed respectively in the front direction of the local speaker unit groups 52a to 52c. Note that which local speaker unit group 52a to 52c outputs the three channels can be set by an operation input unit such as a remote controller.

(C) When the flat speaker units at both ends are folded, the flat speaker unit at the center is placed flat, and a two-channel audio signal is input (FIG. 6C)
When the planar speaker units 10a to 10j are arranged as shown in FIG. 6C, the rotation angle detection unit 204 has the rotation angles θ _ab and θ _ij of the connection units 11ab and 11ij to be 360 °, and the connection unit It is detected that the rotation angles θ _bc and θ _{hi of} 11bc and 11hi are 90 °, and the rotation angle θ of the other connecting portions is 180 °, and outputs it to the CPU 200. On the other hand, the audio signal input unit 205 detects the number of channels N _B = “2” of the input audio signal and outputs it to the CPU 200. Based on these detection results, the CPU 200 does not emit sound from the flat speaker units 10a, 10b, 10i, and 10j, and the front direction of the local speaker unit group 53a including the flat speaker units 10c to 10e, the flat speaker units 10f to 10h. The signal control parameters (delay control parameter, amplitude control parameter) that form the directivity for emitting two independent channels of sound signals in the front direction of the local speaker unit group 53b are read out and output to the DSP 202.

  The DSP 202 performs delay processing and amplitude processing on the audio signal output to each flat speaker 101 (each drive unit 203) according to this signal control parameter. Specifically, the local speaker unit group 53a including the flat speaker units 10c to 10e emits the sound signal of the first channel in the front direction of the speaker device 1, and the local speaker unit group 53b including the flat speaker units 10f to 10h. The sound signal of the second channel is emitted in the front direction of the speaker device 1. Thereby, two independent sound fields according to two channels can be formed in the front direction of the speaker device 1. Note that which local speaker unit group 53a and 53b outputs the two channels can be set by an operation input unit such as a remote controller.

(D) When the flat speaker units are divided into two groups and arranged in the shape of “he” and a three-channel audio signal is input (FIG. 6D)
When the flat speaker units 10a to 10j are arranged as shown in FIG. 6 (d), the rotation angle detection unit 204 has a rotation angle θ _ef of the connection unit 11ef of 270 °, and the rotation of other connection units. It detects that the angle θ is 180 ° and outputs it to the CPU 200. On the other hand, the audio signal input unit 205 detects the number of channels N _B = “3” of the input audio signal and outputs it to the CPU 200. Based on these detection results, the CPU 200 has three independent channels for the front direction of the local speaker unit group 54a including the flat speaker units 10a to 10e and the front direction of the local speaker unit group 54b including the flat speaker units 10f to 10j. The signal control parameters (delay control parameter, amplitude control parameter) forming the directivity for emitting the sound signal are read out and output to the DSP 202. At this time, the local speaker unit group 54b is further divided into a local speaker unit group 541a composed of the planar speaker units 10f to 10h and a local speaker unit group 541b composed of the planar speaker units 10i and 10j. Is set.

  The DSP 202 performs delay processing and amplitude processing on the audio signal output to each flat speaker 101 (each drive unit 203) according to this signal control parameter. Specifically, the local speaker unit group 54a including the planar speaker units 10a to 10e emits the sound signal of the first channel in the front direction of the local speaker unit group 54a, and the local speaker unit including the planar speaker units 10f to 10j. The group 54b emits sound signals of the second and third channels in the front direction of the local speaker unit group 54b. Here, the local speaker unit group 54b is divided into local speaker unit groups 541a and 541b in the control of audio signals. The local speaker unit group 541a transmits the audio signal of the second channel in the front direction of the local speaker unit group 54b. The sound is emitted and the local speaker unit group 541b emits the audio signal of the third channel in the front direction of the local speaker unit group 54b. As a result, three independent sound fields corresponding to the three channels can be formed in the front direction of the local speaker unit groups 54a and 54b. Note that which local speaker unit group 54a, 541a, 541b outputs the three channels can be set by an operation input unit such as a remote controller.

(E) When planar speaker units are divided into three groups, arranged in a “U” shape, and a 4-channel audio signal is input (FIG. 6E)
When the flat speaker units 10a to 10j are arranged as shown in FIG. 6E, the rotation angle detection unit 204 has the rotation angles θ _cd and θ _gh of the connection portions 11cd and 11gh of 270 °, The rotation angle θ of the connecting portion is detected to be 180 ° and output to the CPU 200. On the other hand, the audio signal input unit 205 detects the number of channels N _B = “4” of the input audio signal and outputs it to the CPU 200. Based on these detection results, the CPU 200 determines the front direction of the local speaker unit group 55a including the flat speaker units 10a to 10c, the front direction of the local speaker unit group 55b including the flat speaker units 10d to 10g, and the flat speaker units 10h to 10j. Signal control parameters (delay control parameter, amplitude control parameter) that form directivity for independently emitting sound signals of four channels are read out in the front direction of the local speaker unit group 55 c and output to the DSP 202. At this time, the local speaker unit group 55b is further divided into a local speaker unit group 551a composed of the planar speaker units 10d and 10e and a local speaker unit group 551b composed of the planar speaker units 10f and 10g. The signal is set.

  The DSP 202 performs delay processing and amplitude processing on the audio signal output to each flat speaker 101 (each drive unit 203) according to this signal control parameter. Specifically, in the local speaker unit group 55a composed of the flat speaker units 10a to 10c, the audio signal of the first channel is transmitted in the front direction of the local speaker unit group 55a (clockwise with respect to the front direction of the local speaker unit group 55b). ), And the second and third channel audio signals are emitted in the front direction of the local speaker unit group 55b by the local speaker unit group 55b including the flat speaker units 10d to 10g. The local speaker unit group 55c is configured to emit the fourth channel audio signal in the front direction of the local speaker unit group 55c (90 ° counterclockwise with respect to the front direction of the local speaker unit group 55b). Here, the local speaker unit group 55b is divided into a local speaker unit group 551a and a local speaker unit group 551b in controlling the audio signal, and the local speaker unit group 551a converts the second channel audio signal into the local speaker unit group 551a. The sound is emitted in the front direction of 55b, and the sound signal of the third channel is emitted in the front direction of the local speaker unit group 55b by the local speaker unit group 551b. Thereby, four independent sound fields corresponding to the four channels can be formed in the front direction of the local planar speaker unit groups 55a, 55b, and 55c. Note that which of the local speaker unit groups 55a, 551a, 551b, and 55c outputs the four channels can be set by an operation input unit such as a remote controller.

(F) When flat speaker units are divided into four groups and arranged in a “W” shape, and a two-channel audio signal is input (FIG. 6F)
When the flat speaker units 10a to 10j are arranged as shown in FIG. 6 (f), the rotation angle detection unit 204 has the rotation angles θ _bc and θ _hi of the connection portions 11bc and 11hi to be 90 °, and the connection portion It is detected that the rotation angle θ _{ef of 11 ef} is 270 ° and the rotation angle θ of the other connecting portion is 180 °, and is output to the CPU 200. On the other hand, the audio signal input unit 205 detects the number of channels N _B = “2” of the input audio signal and outputs it to the CPU 200. Based on these detection results, the CPU 200 is composed of a space surrounded by the local speaker unit group 56a including the flat speaker units 10a and 10b and the local speaker unit group 56b including the flat speaker units 10c to 10e, and the flat speaker units 10f to 10h. A signal control parameter (delay control parameter, which forms a directivity for emitting two channels of audio signals independently in a space surrounded by the local speaker unit group 56d including the local speaker unit group 56c and the flat speaker units 10i and 10j. Amplitude control parameter) is read out and output to the DSP 202.

  The DSP 202 performs delay processing and amplitude processing on the audio signal output to each flat speaker 101 (each drive unit 203) according to this signal control parameter. Specifically, the local speaker unit groups 56a and 56b including the flat speaker units 10a to 10e emit the sound signal of the first channel into the space surrounded by the local speaker unit groups 56a and 56b, and the flat speaker units 10f to 10j. The second speaker audio signals are emitted into a space surrounded by the local speaker unit groups 56c and 56d. Thus, two independent sound fields corresponding to two channels can be formed in the space surrounded by the local speaker unit groups 56a and 56b and the space surrounded by the local speaker unit groups 56c and 56d. Note that to which space the two channels are output can be set by an operation input unit such as a remote controller.

  6 (a) to 6 (f) only show some setting examples that can be realized by the present embodiment, depending on the number of connections, the number of signal channels, and the desired sound field setting. Other sound fields can also be realized.

  As described above, by using the configuration of the present embodiment, in the acoustic system in which a plurality of planar speaker units are rotatably connected, the rotation angle of the connection portion, that is, the installation position relationship of each planar speaker unit is determined. In response, and depending on the number of channels of the input audio signal, a plurality of desired independent sound fields can be formed simultaneously.

  In the above description, the rotation angle detection unit 204 is realized by the encoder provided in the connection member and the rotation angle calculation unit (not shown) that calculates the rotation angle θ from the pulse count information from the encoder. However, the following configuration may be used.

FIG. 7 is a partial block diagram showing an acoustic system including a rotation angle detection unit 204 having another configuration.
As shown in FIG. 7, the acoustic system having this configuration includes a switch 207 between each driving unit 203 and each flat speaker 101 corresponding thereto, and between the switch 207 and the rotation angle detecting unit 204. An output amplifying unit 206 is provided. The rotation angle detection unit 204 includes a delay detection unit 241, an angle detection unit 242, and a memory 243. Other configurations are the same as those of the acoustic system shown in FIG. Here, the switch 207 corresponds to the “switching unit” of the present invention, and the delay detection unit 241 corresponds to the “sound collection directivity detecting unit” of the present invention.

  Next, the rotation angle detection operation will be described using the connection portion 11bc as an example.

When detecting the rotation angle θ _bc of the connecting portion 11bc, the CPU 200 emits sound (in this example, the planar speaker unit 10b) to the adjacent planar speaker units 10b, 10c, and the other (in this example, the planar speaker unit). 10c) is collected. The switch 207 connected to the flat speaker 101 of the flat speaker unit 10b connects the flat speaker 101 and the drive unit 203, and the switch 207 connected to the flat speaker 101 of the flat speaker unit 10c includes the flat speaker 101 and the output amplifying unit 206. And connect.

When an omnidirectional audio signal is emitted from the speaker 101 of the flat speaker unit 10b, the audio signal is collected by the speaker 101 of the adjacent flat speaker unit 10c at a predetermined rotation angle _θbc . At this time, since the flat speaker units 10b and 10c are installed at the predetermined rotation angle θ _bc , even if the sound signals to be emitted are all in phase, the sound signals to be collected have a predetermined delay relationship. .

The delay detection unit 241 of the rotation angle detection unit 204 detects the delay relationship of each audio signal from the audio signal collected by each flat speaker 101 of the flat speaker unit 10 c and outputs the delay data to the angle detection unit 242. The memory 243 stores in advance the relationship between the delay data and the rotation angle θ. Angle detection unit 242 reads the rotational angle theta corresponding from the memory 243 based on the delay data, and outputs the CPU200 as the rotation angle theta _bc connecting portion 11bc.

  Even if it is set as such a structure, a rotation angle can be detected and there can exist the above-mentioned effect. In addition, if the sound system has a specification including a microphone function and a speaker function in advance, the rotation angle can be detected without adding components such as an encoder, and the structure of the speaker device and the entire sound system is simplified. be able to.

Next, an acoustic system according to the second embodiment will be described with reference to FIGS.
8A and 8B are external views of the speaker unit used in the acoustic system of the present embodiment, where FIG. 8A is a plan view, FIG. 8B is a front view, FIG. 8C is a bottom view, and FIG. 8D is a left side view. ) Is a right side view.
FIG. 9 is a block diagram showing functional parts of the speaker unit shown in FIG.

  The speaker unit 30 of the present embodiment includes a substantially rectangular parallelepiped housing, and the plurality of speakers 301 to 308 are arrayed with the longitudinal direction of the speaker unit 30 as an array direction. The opening surfaces of the speakers 301 to 308 are the front surface of the speaker unit 30, and the connecting holes 311 and 312 are formed on the top surface of the speaker unit 30. The connecting holes 311 and 312 are both ends of the casing in the longitudinal direction. It is formed in the vicinity apart. In addition, connecting holes 313 and 314 are formed on the bottom surface of the speaker unit 30, and the connecting holes 311 and 312 are formed in the vicinity of both ends in the longitudinal direction of the casing. Here, the connecting hole 311 and the connecting hole 313 are arranged at the positions where the connecting hole 311 and the connecting hole 313 are opposed to each other, and the connecting hole 312 and the connecting hole 314 are arranged at the opposed positions. Further, a connecting hole 315 is formed on the left side surface of the speaker unit 30, and a connecting hole 316 is formed on the right side surface.

  The speaker unit 30 includes a CPU 31, a connection detection unit 32, a PLL 33, a reference oscillator 34, a speaker directivity control circuit 35, a microphone directivity control circuit 36, a switch circuit 37, and speakers 300 (301 to 308).

  The CPU 31 generates a directivity control command according to the control signal Scon input from the outside and the connection state detection signal from the connection detection unit 32, and outputs the directivity control command to the speaker directivity control circuit 35 or the microphone directivity control circuit 36. .

  The connection detection unit 32 detects the connection state of the speaker unit 30 itself and generates a connection state detection signal. Here, the connected state is a state in which the speaker unit 30 is electrically and mechanically connected by connecting rods 40, 42, 46, etc., as will be described later, and is itself connected in the entire acoustic system, that is, connected. This is a detection of what position (upstream side, downstream side), posture, and connected state among a plurality of speaker unit groups. And the connection detection part 32 memorize | stores a position, an attitude | position, and a connection state, and produces | generates the connection state detection signal based on these.

  The PLL 33 generates a reference clock signal using the connection state detection signal of the connection state detection unit 32 and the reference frequency signal from the reference oscillator 34, and supplies the reference clock signal to the speaker directivity control circuit 35 and the microphone directivity control circuit 36. . In addition, when a reference clock signal is input from the outside, the PLL 33 adjusts its own reference clock signal using this signal and supplies it to the speaker directivity control circuit 35 and the microphone directivity control circuit 36.

  The speaker directivity control circuit 35 controls the amplitude and delay of an audio signal input to each speaker 300 connected via the switch circuit 37 in accordance with a directivity control command input from the CPU 31. The controlled audio signal is transmitted to the symmetrical speaker 300 via the switch circuit 37 and emitted from the speaker 300.

  The microphone directivity control circuit 36 controls the amplitude and delay of the audio signal collected by each speaker 300 connected via the switch circuit 37 in accordance with the directivity control command input from the CPU 31. If the plurality of speaker units 30 are connected, the controlled audio signal is synthesized with the microphone delay sum signal from the connected front stage (upstream side) speaker unit, and the rear stage (downstream side) speaker. Output to the unit.

  10 is an external view and a cross-sectional view showing the shape of the connecting rod 40, FIG. 11 is an external view and a cross-sectional view showing the shape of the connecting rod 42, and FIG. 12 is an external view and cross-section showing the shape of the connecting rod 46. FIG.

  The connecting rod 40 shown in FIG. 10 is formed of a substantially linear and cylindrical rod-shaped conductor, and includes connectors 41a and 41b at both ends in the longitudinal direction. By connecting these connectors 41a and 41b to connecting holes 311 to 316 of different speaker units 30, the two speaker units 30 are mechanically connected. The connecting rod 40 is made of a conductor having a predetermined resistance value, and the connected speaker unit 30 detects the resistance value, thereby detecting the connection of the connecting rod 40. For example, when the connecting rod 40 is connected to the connecting hole 315 of the speaker unit 30, the connection detection unit 32 of the speaker unit 30 detects a change in the resistance value on the outside from the connecting hole 315 due to the resistance component of the connecting rod 40. Detect connection.

In the two speaker units 30 directly connected by this connecting rod 40, the mutual connection relation is specifically detected by the following method.
First, the speaker unit 30 on the upstream side of the system detects which connecting hole 311 to 316 in itself is connected to the connecting rod 40. The detected connection information is transmitted to the downstream speaker unit 30 through the same route as the control signal. The speaker unit 30 on the downstream side detects which connecting hole 311 to 316 is connected to the downstream speaker unit 30 and determines its position relative to the upstream speaker unit 30 from the connection information from the speaker unit 30 on the upstream side. Is detected. The downstream speaker unit 30 generates a directivity control command based on the detection result. By using such a control method, even if more speaker units 30 are connected, the downstream speaker unit 30 detects its own position and generates a predetermined directivity control command. Desired directivity control can be performed.

  An example of connection of speaker units using such a connecting rod 40 is shown in FIG. Note that the configuration of the present embodiment can be applied as long as the example shown in FIG. 13 is not all and is connected using a structure such as the connecting rod 40.

The acoustic system shown in FIG. 13 (a) is composed of two speaker units 30a and 30b and a connecting rod 40a. The speaker units 30a and 30b are arranged so that the connecting rods 40a are connected by connecting holes on the side surfaces facing each other and the same direction is the front.
The acoustic system shown in FIG. 13 (b) includes four speaker units 30a to 30d and connecting rods 40a to 40c. The speaker units 30a and 30b connect the connecting rod 40a at the connecting hole on the top surface and the connecting hole on the bottom surface, and the speaker units 30b and 30c connect the connecting rod 40b at the connecting holes on the side surfaces facing each other. The units 30c and 30d connect the connecting rod 40c with the connecting hole on the bottom surface and the connecting hole on the top surface facing each other. And these speaker units 30a-30d are arrange | positioned so that the same direction may be made into the front.

The acoustic system shown in FIG. 13C includes three speaker units 30a to 30c and connecting rods 40a and 40b. The speaker units 30a and 30b are connected to the connecting rod 40a at the side connecting holes facing each other, and the speaker units 30b and 30c are connected to the connecting rod 40b at the side connecting holes facing each other. And the speaker units 30a-30c are arrange | positioned so that the same direction may be made into the front.
The acoustic system shown in FIG. 13D is composed of three speaker units 30a to 30c and connecting rods 40a and 40b. The speaker units 30a and 30b are connected to the connecting rod 40a by a connecting hole on the bottom surface close to the side surface facing each other and a connecting hole on the top surface, and the speaker units 30b and 30c are connected to the top surface connecting hole and the bottom surface near the side surface facing each other. The connecting rod 40b is connected to the connecting hole. And the speaker units 30a-30c are arrange | positioned so that the same direction may be made into the front.
The acoustic system shown in FIG. 13 (e) includes four speaker units 30a to 30d and connecting rods 40a to 40c. The speaker units 30a and 30b are connected to a connecting rod 40a between a connecting hole on the bottom surface near the side surface facing each other and a connecting hole on the side surface, and the speaker units 30b and 30c are a connecting hole on the side surface facing each other and a bottom surface near the side surface. The connecting rod 40b is connected to the connecting hole. The speaker units 30c and 30d connect the connecting rod 40c with a connecting hole on the bottom surface close to the side surface facing each other and a connecting hole on the side surface. And the speaker units 30a-30d are arrange | positioned so that the same direction may be made into the front.

  Thus, by combining a plurality of speaker units 30 having the same shape each having a plurality of connecting holes and a plurality of connecting rods having the same shape, various types as shown in FIGS. A structural acoustic system can be constructed. These speaker units perform directivity control, whereby a desired sound field can be formed.

  The connecting rod 42 shown in FIG. 11 includes two partial rods 43a and 43b and a connecting portion 44 that connects them. The partial rod 43a is formed of a cylindrical rod-shaped conductor having a substantially uniform diameter, and a connector 41a is installed at one end in the longitudinal direction. The partial rod 43b has a shape in which two cylindrical portions having different diameters are formed stepwise in the longitudinal direction, and the smaller diameter side has substantially the same diameter as the partial rod 43a. A connector 41b is installed at the end portion on the small diameter side, and the end portion facing the connector 41a side of the partial rod 43a is fitted into the end portion on the large diameter side. The connecting portion 44 corresponds to this fitting portion. Thereby, the connecting rod 42 has a structure in which the partial rod 43a and the partial rod 43b rotate relatively at a predetermined angle with the longitudinal direction (extending direction) as the central axis. The connecting portion 44 is provided with a rotation lock mechanism that keeps the rotating and stopped state. When the partial rod 43a and the partial rod 43b are installed at a predetermined rotation angle, this state is locked and fixed. Can be held continuously.

  With this configuration, the speaker units connected to both ends of the connecting rod 42 are connected so that their front faces are in a twisted relationship with respect to the axial direction of the connecting rod 42. As a result, not only one-dimensional directivity control (see FIG. 13) as in the case of using the connecting rod 40, but also two-dimensional directivity control (see FIG. 14) can be performed.

  In addition, the connecting rod 42 can further change the total length in the longitudinal direction by providing a structure for adjusting the amount of insertion of the partial rod 43a into the partial rod 43b. Thereby, the space | interval of the two speaker units connected by the connecting rod 42 can be varied. Here, the connecting rod 42 has a structure in which the resistance value changes in proportion to the change in the total length. Thereby, the connected speaker unit 30 can detect the full length of the connecting rod 42, that is, the distance to the speaker unit 30 to which the connected speaker unit 30 is connected via the connecting rod 40.

  At this time, the connecting rod 42 has a predetermined resistance value like the connecting rod 40 described above, and is provided with an angle sensor 45 that detects the rotation angle of the connecting portion 44. The angle sensor 45 is a sensor that detects a relative angle between the stator and the rotor using one partial rod (for example, the partial rod 43b) as a stator and the other partial rod (for example, the partial rod 43a) as a rotor. . The angle information detected from the angle sensor 45 is transmitted to the speaker unit 30 on the downstream side.

In the two speaker units 30 directly connected by this connecting rod 42, the mutual connection relation is specifically detected by the following method.
First, the speaker unit 30 on the upstream side of the system detects to which of the connecting holes 311 to 316 the connecting rod 42 is connected. The detected connection information is transmitted to the downstream speaker unit 30 through the same route as the control signal. The speaker unit 30 on the downstream side detects which connecting hole 311 to 316 in itself is connected to the connecting rod 42 and reads angle information from the angle sensor 42 of the connected connecting rod 42. Furthermore, the downstream speaker unit 30 detects its own position and orientation relative to the upstream speaker unit 30 from these information and connection information from the upstream speaker unit 30. The downstream speaker unit 30 generates a directivity control command based on the detection result. By using such a control method, even if more speaker units 30 are connected, the speaker unit 30 on the downstream side detects its own position and orientation and generates a predetermined directivity control command. As a whole system, desired two-dimensional directivity control can be performed.

  An example of connection of speaker units using such a connecting rod 42 is shown in FIG. Note that the configuration of this embodiment can be applied as long as the example shown in FIG. 14 is not all and is connected using a structure such as the connecting rod 42.

The acoustic system shown in FIG. 14A includes three speaker units 30a to 30c and connecting rods 42a and 42b. The speaker units 30a and 30b are arranged such that the connecting rods 42a are connected by connecting holes on the side surfaces facing each other, and the connecting rods 42a are rotated (twisted) at a predetermined angle so that the front directions of each other are shifted by a predetermined angle. . The speaker units 30b and 30c are arranged such that the connecting rods 42b are connected by connecting holes on the side surfaces facing each other, and the connecting rods 42b are rotated (twisted) by a predetermined angle so that the front directions of each other are shifted by a predetermined angle. . And it is installed so that the front direction of the speaker unit 30a may differ from the front direction of the speaker unit 30c.
The acoustic system shown in FIG. 14B includes three speaker units 30a to 30c and connecting rods 42a and 42b. The speaker units 30a and 30b are connected to each other by connecting a connecting rod 42a between a connecting hole on the side surface facing each other and a connecting hole on the top surface close to the side surface, and rotating (twisting) the connecting rod 42a at a predetermined angle. The directions are arranged so as to deviate by a predetermined angle. The speaker units 30b and 30c are connected to each other by connecting the connecting rod 42b between the connecting hole on the top surface close to the opposite side surface and the connecting hole on the side surface, and rotating (twisting) the connecting rod 42b at a predetermined angle. The directions are arranged so as to deviate by a predetermined angle.

  In this way, by combining a plurality of speaker units 30 having the same shape each having a plurality of connecting holes and a plurality of connecting rods having the same shape and rotating about the axis, FIGS. 14A and 14B are combined. Various acoustic systems can be constructed as shown. Each of these speaker units performs directivity control, thereby forming a desired sound field in a one-dimensional wider area than the acoustic system shown in FIGS. 13 (a) to 13 (e). be able to.

  The connecting rod 46 shown in FIG. 12 includes three partial rods 43a, 43b, and 43c, a connecting portion 44 that connects the partial rods 43a and 43b, and a rotating portion 47 that connects the partial rods 43b and 43c so as to be rotatable. And prepare. The partial rod 43a is formed of a cylindrical rod-shaped conductor having a substantially uniform diameter, and a connector 41a is installed at one end in the longitudinal direction. The partial rod 43b has a cylindrical shape with a diameter different from that of the partial rod 43a, and has an inner diameter substantially the same as the outer diameter of the partial rod 43a. The end of the partial rod 43b facing the connector 41a side of the partial rod 43a is fitted. The connecting portion 44 corresponds to this fitting portion. The other end of the partial rod 43 b is connected to the partial rod 43 c via the rotating portion 47. The partial rod 43c has a shape in which two cylindrical portions having different diameters are stepped in the longitudinal direction, and the smaller diameter side has substantially the same diameter as the partial rod 43a. A connector 41 b is installed at the end portion on the small diameter side, and the end portion on the large diameter side is connected to the partial rod 43 b via the rotating portion 47. With such a structure, the connecting rod 46 has a structure in which the partial rod 43a and the partial rod 43b rotate relatively at a predetermined angle with the longitudinal direction (extending direction) as the central axis. The connecting portion 44 is provided with a rotation lock mechanism that keeps the rotating and stopped state. When the partial rod 43a and the partial rod 43b are installed at a predetermined rotation angle, this state is locked and fixed. Can be held continuously. Further, the connecting rod 46 has a structure that rotates so that the extending direction of the partial rod 43b and the extending direction of the partial rod 43c have a predetermined angle. The rotation unit 47 includes a rotation lock mechanism that holds the state where the partial rods 43b and 43c rotate and stop at a predetermined angle, and the partial rod 43a and the partial rod 43b have a predetermined rotation angle relationship. When installed, this state can be locked and held continuously.

  At this time, the connecting rod 46 has a predetermined resistance value like the connecting rods 40 and 42 described above, and is provided with an angle sensor 45 that detects the rotation angle of the connecting portion 44 like the connecting rod 42. Further, the connecting rod 46 is provided with a rotation angle sensor 48 that detects the rotation angle of the rotation unit 47.

  The rotation angle sensor 48 detects a relative angle between the stator and the rotor using one partial rod (for example, the partial rod 43b) as a stator and the other partial rod (for example, the partial rod 43c) as a rotor. Sensor. The rotation angle information detected by the rotation angle sensor 48 is transmitted to the downstream speaker unit 30 together with the angle information detected by the angle sensor 45.

In the two speaker units 30 directly connected by this connecting rod 46, the mutual connection relation is specifically detected by the following method.
First, the speaker unit 30 on the upstream side of the system detects which connecting hole 311 to 316 in itself is connected to the connecting rod 46. The detected connection information is transmitted to the downstream speaker unit 30 through the same route as the control signal. The speaker unit 30 on the downstream side detects which connecting hole 311 to 316 in itself is connected to the connecting rod 46, and rotates angle information from the angle sensor 45 of the connected connecting rod 46 and rotation angle sensor 48. Read the moving angle information. Furthermore, the downstream speaker unit 30 detects its own position and orientation relative to the upstream speaker unit 30 from these information and connection information from the upstream speaker unit 30. The downstream speaker unit 30 generates a directivity control command based on the detection result. By using such a control method, even if more speaker units 30 are connected, the speaker unit 30 on the downstream side detects its own position and orientation and generates a predetermined directivity control command. As a whole system, desired three-dimensional directivity control can be performed.

  An example of connection of speaker units using such a connecting rod 46 is shown in FIG. Note that the configuration of the present embodiment can be applied if the example shown in FIG. 15 is not all and is connected using a structure such as the connecting rod 46.

The acoustic system shown in FIG. 15A is composed of four speaker units 30a to 30d and connecting rods 46a to 46c. The speaker units 30a and 30b connect the connecting rod 46a between the connecting hole on the side surface close to each other and the connecting hole on the top surface close to the side surface, and rotate (bend) the connecting rod 46a by a predetermined angle (approximately 90 °). ) So that the front directions of each other coincide with each other. The speaker units 30b and 30c connect the connecting rod 46b between the connecting hole on the side surface close to each other and the connecting hole on the top surface close to the side surface, and rotate (bend) the connecting rod 46b by a predetermined angle (approximately 90 °). ) So that the front directions of each other coincide with each other. The speaker units 30c and 30d connect the connecting rod 46c with the connecting hole on the side surface close to each other and the connecting hole on the top surface close to the side surface, and rotate (bend) the connecting rod 46c at a predetermined angle (approximately 90 °). ) So that the front directions of each other coincide with each other.
The acoustic system shown in FIG. 15B is composed of six speaker units 30a to 30f and connecting rods 46a to 46e. The speaker units 30a and 30b are connected to connecting rods 46a through connecting holes on opposite side surfaces, and the connecting rod 46a is rotated (bent) at a predetermined angle (approximately 120 °) and rotated (twisted) at a predetermined angle. ) So that the front directions of each other are different. The speaker units 30b and 30c are connected to connecting rods 46b through connecting holes on opposite side surfaces, and the connecting rod 46b is rotated (bent) at a predetermined angle (approximately 120 °) and rotated (twisted) at a predetermined angle. ) So that the front directions of each other are different. The speaker units 30c and 30d are connected to the connecting rod 46c at the connecting holes on the side surfaces facing each other, and the connecting rod 46c is rotated (bent) at a predetermined angle (approximately 120 °) and rotated (twisted) at the predetermined angle. ) So that the front directions of each other are different. The speaker units 30d and 30e are connected to the connecting rod 46d through connecting holes on the side surfaces facing each other, and the connecting rod 46d is rotated (bent) at a predetermined angle (approximately 120 °) and rotated (twisted) at a predetermined angle. ) So that the front directions of each other are different. The speaker units 30e and 30f connect the connecting rod 46e with connecting holes on the side surfaces facing each other, rotate (bend) the connecting rod 46e at a predetermined angle (approximately 120 °), and rotate (twist) it at a predetermined angle. ) So that the front directions of each other are different. With this arrangement, the acoustic system shown in FIG. 15B has a substantially regular hexagonal shape when viewed from the front, and each side of the hexagon is the speaker units 30a to 30f. Furthermore, the front direction of each speaker unit 30a-30f is set so that the position of a predetermined distance becomes a focus from the center of each speaker unit 30a-30f in the front direction of the acoustic system.

  The acoustic system shown in FIG. 15 (c) includes five speaker units 30a to 30e and connecting rods 46a to 46d. The speaker units 30a and 30b connect the connecting rod 46a between the connecting hole on the bottom face and the connecting hole on the top face, and the connecting rod 46a is rotated (bent) by a predetermined angle so that the front directions of the speaker units 30a and 30b are different from each other. It is arranged to let you. The speaker units 30b and 30c are connected to the connecting rod 46b at the connecting hole on the bottom surface and the connecting hole on the top surface, and the connecting rod 46b is rotated (bent) at a predetermined angle so that the front directions of the speaker units 30b and 30c are different. It is arranged to let you. The speaker units 30c and 30d are connected to a connecting rod 46c between a bottom connecting hole and a top connecting hole, and the connecting rod 46c is rotated (bent) by a predetermined angle so that the front directions of the speaker units 30c and 30d are different from each other. It is arranged to let you. The speaker units 30d and 30e are connected to each other at the bottom connecting hole and the top connecting hole by connecting the connecting rod 46d and rotating the connecting rod 46d by a predetermined angle so that the front directions of the speaker units 30d and 30e are different from each other. It is arranged to let you. The connecting rods 46a to 46d are set to the same rotation angle, and the speaker units 30a to 30e are arranged so as to be arranged in a substantially semicircular shape when viewed from the side surface direction. Under the present circumstances, the front direction of each speaker unit 30a-30e is arrange | positioned outward by the semi-circular normal line direction.

  In this way, by combining a plurality of speaker units 30 having the same shape each having a plurality of connecting holes and a plurality of connecting rods having the same shape and rotating about the axis, the bending rods are combined. The acoustic system having various structures as shown in c) can be configured. Each of these speaker units performs directivity control, so that a desired sound field can be formed over a one-dimensional wider area than the acoustic system shown in FIGS. 14 (a) and 14 (b). it can.

  As described above, by using the configuration of the present embodiment, it is possible to configure an acoustic system including a combination of speaker units over a wide variety with a relatively easy configuration. Thereby, a desired sound field can be easily formed.

  In the present embodiment, an example in which a plurality of the same connecting rods are used has been described. However, various connecting rods may be mixed and used in one acoustic system.

  In addition, a cone speaker may be used as the speaker of the above-described embodiment. In this case, beam control is realized by driving each of the speakers in each speaker unit with individual delay processing. As a result, it is possible to output a sound according to the set directivity and form a desired sound field.

1 is an external perspective view of a speaker device 1 used in the acoustic system of the first embodiment. Schematic which shows the structure of the flat speaker unit 10 which comprises the speaker apparatus 1. FIG. Enlarged exploded perspective view and plan view showing the connecting portion 11 of adjacent planar speaker units The block diagram which shows schematic structure of the acoustic system of 1st Embodiment. Schematic diagram showing data stored in the memory 201 Conceptual diagram showing the specific arrangement of flat speaker units and the sound field to be formed The partial block diagram which shows the acoustic system containing the rotation angle detection part 204 of another structure. External view of speaker unit used in acoustic system of second embodiment The block diagram which shows the function part of the speaker unit shown in FIG. External view and sectional view showing the shape of the connecting rod 40 External view and sectional view showing the shape of the connecting rod 42 External view and sectional view showing the shape of the connecting rod 46 The figure which shows the example of a connection of the speaker unit using the connecting rod 40 The figure which shows the example of a connection of the speaker unit using the connecting rod 42 The figure which shows the example of a connection of the speaker unit using the connecting rod 46

Explanation of symbols

1-speaker device 10, 10a to 10j-planar speaker unit 11, 11ab to 11ij-connecting portions 30a to 30f-speaker unit 31-CPU
32-link detector 33-PLL
34-reference oscillator 35-directivity control circuit for speakers 36-directivity control circuit for microphones 37-switch circuits 300, 301 to 308-speakers 311 to 316-connecting holes 40, 40a to 40c, 42, 42a, 42b, 46 , 46a to 46e-connecting rods 43a, 43b, 43c-partial rod 44-connecting part 45-angle sensor 47-rotating part 48-rotating angle sensors 51a, 51b, 51c, 52a, 52b, 52c, 53a, 53b, 54a, 54b, 541a, 541b, 55a, 55b, 55c, 551a, 551b-local speaker unit group 100-housing 101-flat speaker 102-connecting protrusion 110-connecting member 111-insertion hole 200-CPU
201-memory 202-DSP
203-Driver 204-Rotation angle detector 205-Audio signal input unit 206-Output amplifier 207-Switch 241-Delay detector 242-Angle detector 243-Memory

Claims (6)

A plurality of speaker units each having a plurality of speakers arranged;
Connecting means for connecting the plurality of speaker units;
Connection attitude detection means for detecting the connection attitude of adjacent speaker units connected by the connection means;
An acoustic system comprising: control means for setting audio signals for each of the plurality of speaker units based on the set sound field and the detected connection posture. Provided with audio signal input means for detecting the number of channels by inputting audio signals of a plurality of channels,
The acoustic system according to claim 1, wherein the control unit sets an audio signal for each of the plurality of speaker units based on the number of channels, the set sound field, and the detected connection posture. The connecting means includes
Two conductor members;
A conductor connecting portion for connecting the two conductor members so that the extending directions of the two conductor members substantially coincide and the length formed by the two conductor members is variable;
A length detecting means for detecting a length formed by the two conductor members,
The acoustic system according to claim 1, wherein the connection posture detection unit detects a connection posture based on the detected length. The conductor connecting portion connects the two conductor members so as to be rotatable about the extending direction of the two conductor members as a central axis;
The connection means includes a rotation angle detection means for detecting a rotation angle of the conductor connection portion,
The acoustic system according to claim 1, wherein the connection posture detection unit detects a connection posture based on the detected rotation angle. The conductor connecting portion connects the two conductor members so that they can be bent,
The connecting means includes a bending angle detecting means for detecting a bending angle of the conductor connecting portion,
The acoustic system according to claim 1, wherein the connection posture detection unit detects a connection posture based on the detected bending angle. Switching means for switching whether the speaker functions as a microphone or a speaker;
A sound collection directivity detecting means for detecting the directivity of an audio signal coming from an audio signal collected by a speaker switched to a microphone by the switching means,
The sound according to claim 1, wherein the connection posture detection unit detects a connection posture based on a detection result of the sound collection directivity detection unit based on sound emission and sound collection performed between the adjacent speaker units. system.

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