JP2009100187A - Sound controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound controller which functions also as an ANC device while achieving personal acoustic environment. <P>SOLUTION: The sound controller (10) has: a first sound source (31) which outputs a first sound signal; a second sound source (32) which outputs a second sound signal; a sound detection part (21); a first control part (41) which performs control so that a noise cancellation signal for canceling noise around the sound detection part may be output on the basis of a detection signal detected by the sound detection part; a second control part (44) which performs control so that a sound cancellation signal for canceling sound based on the second sound signal is output on the basis of the detection signal; and an output part (11) which outputs the first sound signal, the noise cancellation signal, and the sound cancellation signal. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sound control apparatus for actively reducing noise, and more particularly to a sound control apparatus for personal sound.

  The sound detection means 12 collects the noise inside the deck of the railway vehicle and the control sound from the speaker 11, and the calculation control means 21 obtains the original noise from the sound obtained from the sound detection means 12 and controls the adaptive filter 24. There is known an ANC (active noise control) device that generates a control sound fed back from a speaker and actively reduces noise (see, for example, Patent Document 1).

  In addition, an adaptive filter is used to detect a combined signal of an unnecessary sound and a cancel sound in error microphones arranged in a plurality of locations in a vehicle and cancel the unnecessary sound using the combined signal and a music signal reproduced from a music playback device. A music playback device that controls the sound is known (see, for example, Patent Document 2).

  In recent years, there is a voice that desires a system (personal acoustic system) that realizes a new viewing environment in a vehicle interior in which each user wants to listen to favorite music using a speaker arranged corresponding to each seat. . However, in the conventional system, although noise such as engine sound can be controlled, it has been difficult to reduce sound (leakage sound) from speakers arranged corresponding to other seats.

Japanese Patent Laying-Open No. 2005-96498 (FIG. 3) Japanese Utility Model Publication No. 2005-96498 (FIG. 3)

  Accordingly, an object of the present invention is to provide a sound control device that can solve the above-described problems.

  It is another object of the present invention to provide a sound control device that also functions as an ANC device while realizing a personal acoustic environment.

  The sound control device according to the present invention is based on a first sound source that outputs a first sound signal, a second sound source that outputs a second sound signal, a sound detection unit, and a detection signal detected by the sound detection unit. A first control unit that controls to output a noise cancellation signal for canceling noise around the sound detection unit, and a sound cancellation signal for canceling the sound based on the second sound signal based on the detection signal And a second control unit that controls the output, and an output unit that outputs the first sound signal, the noise cancellation signal, and the sound cancellation signal.

  The sound control device according to the present invention includes a first sound source that outputs a first sound signal for a first seat, a second sound source that outputs a second sound signal for a second seat, and the vicinity of the first seat. The first sound detection unit disposed in the vicinity of the first sound detection unit, the second sound detection unit disposed in the vicinity of the second seat, and the first detection signal detected by the first sound detection unit A first control unit that controls to output a first noise cancellation signal for canceling noise, and a second sound cancellation signal for canceling a sound based on the second sound signal based on the first detection signal. A second control unit that controls to output, and a second noise cancellation signal for canceling noise around the second sound detection unit based on the second detection signal detected by the second sound detection unit A third control unit for controlling the second detection signal and a second detection signal A fourth control unit that controls to output a first sound cancellation signal for canceling a sound based on the first sound signal, a first sound signal, a first noise cancellation signal, and a second sound cancellation signal; It has the 1st output part which outputs, and the 2nd output part which outputs a 2nd audio | voice signal, a 2nd noise cancellation signal, and a 1st sound cancellation signal, It is characterized by the above-mentioned.

  According to the sound control device according to the present invention, it is possible to realize a favorable environment in which noise and leakage sound from other sound sources can be canceled.

  A sound control apparatus according to the present invention will be described below with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to these embodiments, but extends to the invention described in the claims and equivalents thereof.

  FIG. 1 is a diagram illustrating an arrangement example of speakers and the like in the vehicle 1.

  In the vehicle 1, as shown in FIG. 1, a driver seat 2, a passenger seat 3, a rear seat 4, a frame 5, a first speaker 11 disposed near the driver seat 2, and a rear seat 4 are disposed. A second speaker 12, a first error microphone 21 disposed between the driver's seat 2 and the passenger seat 3, and a second error microphone 22 disposed in the vicinity of the middle portion of the rear seat 4 are disposed. The first speaker 11, the second speaker 12, the first error microphone 21, the second error microphone 22, and the frame 5 constitute the sound control device 10 according to the present invention. Is arranged.

  The arrangement of speakers and seats shown in FIG. 1 is an example, and for example, a plurality of speakers may be arranged on the front seat side and the rear seat side, respectively.

  In the vehicle 1, another favorite music can be viewed between the passenger group 1 riding in the front seat (driver's seat 2 and passenger seat 3) and the passenger group 2 riding in the rear seat 4. A separate space that can be used is formed. Sound output from the first speaker 11 is provided on the front seat side, and sound output from the second speaker 12 is provided on the rear seat side.

  FIG. 2 is a diagram schematically illustrating sound transmission characteristics to each occupant in the vehicle interior 1.

  As shown in FIG. 2, sound is output from the first speaker 11 toward the occupant (group) 1 and sound is output from the second speaker 12 toward the occupant (group) 2. 11 leaks to the occupant 2 side (H2), and sound from the second speaker 12 leaks to the occupant 1 side (H1). Further, noise from the noise source 30 such as an engine mounted on the vehicle is transmitted to the occupant 1 side (W1) and also transmitted to the occupant 2 side (W2).

  Thus, both the sound leaking from the second speaker 12 (H1) and the sound transmitted from the noise source 30 (W1) are both transmitted to the occupant 1 through the space between the first speaker 11 and the first error microphone 21. The Rukoto. Similarly, the sound leaking from the first speaker 11 (H2) and the sound transmitted from the noise source 30 (W2) are both transmitted to the occupant 2 through the space between the second speaker 12 and the second error microphone 22. It will be.

  In addition, the space transfer characteristic C1 in the space between the first speaker 11 on the front seat side and the first error microphone 21, and the space transfer in the space between the second speaker 12 on the rear seat side and the second error microphone 22 The characteristic C2 can be specified in advance by a measuring device.

  FIG. 3 is a schematic configuration diagram of the sound control apparatus 10 according to the present invention.

  The sound control device 10 is disposed in the vicinity of a noise sensor 20 that detects a noise signal x (n) from a noise source 30, a first error microphone 21 that is disposed in the vicinity of an occupant (group) 1, and an occupant (group) 2. The second error microphone 22, the first sound source 31 that outputs the first sound signal a1 (n), and the second sound source 32 that outputs the second sound signal a2 (n).

  The first sound source 31 and the second sound source 32 may be a playback device such as a CD, a DVD, and an MD, a radio, a TV, and a navigation system. Further, the noise sensor 20 is disposed in the vicinity of the engine of the vehicle and detects an engine operation sound detected as noise as a noise signal x (n).

  In addition, the sound control device 10 generates a signal output from the first speaker 11, a summation unit 40, a first adaptive filter calculation unit (LMS1) 41, a C1 circuit 42, a first adaptive filter 43, a second An adaptive filter calculation unit (LMS2) 44, a C1 circuit 45, a second adaptive filter 46, and the like are included. The circuits 42 and 45 are circuits for adding the spatial transfer characteristics C1.

  Furthermore, the sound control device 10 generates a signal output from the second speaker 12, a summing unit 50, a third adaptive filter calculating unit (LMS3) 51, a C2 circuit 52, a third adaptive filter 53, a fourth An adaptive filter calculation unit (LMS4) 54, a C2 circuit 55, a fourth adaptive filter 56, and the like are included. The circuits 52 and 55 are circuits for adding the spatial transfer characteristics C2.

  Next, generation of a noise cancel signal y1 (n) for canceling noise x (n) from the noise source 30 in the vicinity of the first error microphone 21 will be described.

  When the first detection signal detected by the first error microphone 21 is e1 (n), the output of the C1 circuit 42 is r1 (n), and the coefficient of the first adaptive filter 43 is w1 (n), the following equation is established. .

ここで、第１スピーカ１１から第１エラーマイク２１までの間の空間における空間伝達特性をＣ１、第１適応フィルタ４３のステップサイズパラメータをμとする。

Here, the spatial transfer characteristic in the space between the first speaker 11 and the first error microphone 21 is C1, and the step size parameter of the first adaptive filter 43 is μ.

  That is, the first adaptive filter calculation unit 41 controls the first adaptive filter 43 so as to satisfy the filter update expression shown in Expression (3), thereby reducing noise from the noise source 30 in the vicinity of the first error microphone 21. It is possible to output a noise cancel signal y1 (n) for canceling. In addition, the 2nd error microphone 22, the 3rd adaptive filter calculating part 51, and C2 circuit for producing | generating the noise cancellation signal y2 (n) for canceling the noise from the noise source 30 in the vicinity of the 2nd error microphone 22 The operations of the second adaptive filter 53 and the third adaptive filter 53 are the same, and the description thereof is omitted.

  Next, generation of a sound cancellation signal z1 (n) for canceling leakage sound from the second sound source 32 in the vicinity of the first error microphone 21 will be described.

  The sound signal of the second sound source 32 is a2 (n), the first detection signal detected by the first error microphone 21 is e1 (n), the output of the C1 circuit 45 is s1 (n), and the coefficient of the second adaptive filter 46 If h1 (n), the following equation is established.

ここで、第１スピーカ１１から第１エラーマイク２１までの間の空間における空間伝達特性をＣ１、第１適応フィルタ４３のステップサイズパラメータをμとする。

Here, the spatial transfer characteristic in the space between the first speaker 11 and the first error microphone 21 is C1, and the step size parameter of the first adaptive filter 43 is μ.

  In other words, the second adaptive filter calculation unit 44 controls the second adaptive filter 46 so as to satisfy the filter update equation shown in Equation (6), thereby leaking from the second sound source 32 in the vicinity of the first error microphone 21. It is possible to output a sound cancel signal z1 (n) for canceling the sound. A second error microphone 22, a fourth adaptive filter calculation unit 54, for generating a sound cancellation signal z2 (n) for canceling a leakage sound from the first sound source 31 in the vicinity of the second error microphone 22. Since the operations of the C2 circuit 55 and the fourth adaptive filter 56 are the same, the description thereof is omitted.

  The summation unit 40 includes a first sound signal a1 (n) from the first sound source 31, a noise cancellation signal y1 (n) output from the first adaptive filter 43, and a sound cancellation signal output from the second adaptive filter 46. z1 (n) is added and output to the first speaker 11. Therefore, the occupant (group) 1 cancels the noise from the noise source 30 by the noise cancel signal y1 (n), and cancels the sound leaking from the second speaker 12 by the sound cancel signal z1 (n). Only the sound based on the first sound signal from the first sound source 31 can be viewed.

  Similarly, the summing unit 50 outputs the second sound signal a2 (n) from the second sound source 32, the noise cancellation signal y2 (n) output from the third adaptive filter 53, and the fourth adaptive filter 56. The sound cancellation signal z2 (n) is added and output to the second speaker 12. Therefore, the passenger (group) 2 cancels the noise from the noise source 30 by the noise cancellation signal y2 (n), and cancels the sound leaking from the first speaker 11 by the sound cancellation signal z2 (n). Only the sound based on the second sound signal from the second sound source 32 can be viewed.

  In this way, the sound control device 10 shown in FIGS. 2 and 3 can cancel noise and leakage sound from other sound sources, and thus it is possible to realize a good personal acoustic environment. .

  FIG. 4 is a diagram illustrating another example of arrangement of speakers and the like in the vehicle 1.

  As shown in FIG. 4, the vehicle 1 has a driver seat 2, a passenger seat 3, a rear seat 4, a frame 5, a first speaker 101 disposed in the vicinity of the driver seat 2, and a passenger seat 3. The second speaker 102, the third speaker 113 and the fourth speaker 114 disposed on the left and right of the rear seat 4, the first error microphone 111 disposed near the headrest of the driver seat 2, and the headrest of the passenger seat 3 are disposed near the headrest. Further, a second error microphone 112, a third error microphone 113 disposed near one headrest of the rear seat 4, and a fourth error microphone 114 disposed near the other headrest of the rear seat 4 are disposed. The first speaker 101 to the fourth speaker 104, the first error microphone 111 to the fourth error microphone 114, and the frame 105 constitute another sound control device 100 according to the present invention. Components are arranged.

  In the other sound control apparatus 100 according to the present invention, in the vehicle 1, the occupant 1 riding in the driver's seat 2, the occupant 2 riding in the passenger seat 3, the occupant 3 riding in one of the rear seats 4, and the rear seat 4. Four individual spaces (space transfer characteristics C11 to C14) are formed in which each of the other passengers 4 can view other favorite music. The spatial transfer characteristics C11 to C14 can be specified in advance by a measuring device.

  FIG. 5 is a schematic configuration diagram of a part of another sound control apparatus 100 according to the present invention.

  The sound control device 100 includes a noise sensor 20 that detects a noise signal from the noise source 30, a first error microphone 21 that is disposed near the occupant 1, a first sound source 31 that outputs a first sound signal to the occupant 1, The second sound source 32 that outputs the second sound signal to the occupant 2, the third sound source 33 that outputs the third sound signal to the occupant 3, the fourth sound source 34 that outputs the fourth sound signal to the occupant 4, and the sum Part 120 and the like.

  The first sound source 31 to the fourth sound source 34 may be playback devices such as CDs, DVDs, and MDs, radios, TVs, navigation systems, and the like. The noise sensor 20 is disposed in the vicinity of the engine of the vehicle, and detects an engine operation sound or the like detected as noise as a noise signal.

  The sound control apparatus 100 also includes a first adaptive filter calculation unit (LMS1-N) 121 and a C11 circuit 122 for generating a noise cancellation signal for canceling noise from the noise source 30 in the vicinity of the first error microphone 111. And a first adaptive filter 123, a second adaptive filter calculation unit (LMS1-2) 131 for generating a second sound cancellation signal for canceling a leakage sound based on the second sound source 32 in the vicinity of the first error microphone 111, A third adaptive filter operation unit (LMS1-3) for generating a third sound cancellation signal for canceling a leakage sound based on the third sound source 33 in the vicinity of the C11 circuit 132, the second adaptive filter 133, and the first error microphone 111 141, C11 circuit 142, third adaptive filter 143, first error 111 includes a fourth adaptive filter calculation unit (LMS1-4) 151, a C11 circuit 152, and a fourth adaptive filter 153 for generating a fourth sound cancellation signal for canceling a leakage sound based on the fourth sound source 34 near 111. is doing. The circuits 122, 132, 142, and 152 are circuits for adding the spatial transfer characteristics C11, respectively.

  The summing unit 120 adds the sound signal from the first sound source 31, the noise cancel signal, the second sound cancel signal, the third sound cancel signal, and the fourth sound cancel signal and outputs the sum to the first speaker 101. 1 can view only the sound based on the sound signal from the first sound source 31.

  In FIG. 5, only the configuration for generating a signal to be output to the first speaker 101 corresponding to the occupant 1 boarding the driver's seat 2 is shown, but the other sound control device 100 according to the present invention is Similar to that shown in FIG. 5, it has a configuration for generating signals to be output to each of the second speaker 102 to the fourth speaker 104. Therefore, in the sound control apparatus 100 shown in FIG. 5, it becomes possible for the passengers 1 to 4 to view sounds that do not include noise and that suit each preference.

  FIG. 6 is a schematic configuration diagram of still another sound control apparatus 200 according to the present invention.

  The difference between the sound control device 200 and the sound control device 10 shown in FIG. 3 is that the sound control device 200 does not have a sensor for detecting a noise signal from a noise source and leaks from other sound sources. The configuration for canceling the sound is different. Moreover, although the sound control apparatus 200 is configured in accordance with the arrangement of the speakers and the like shown in FIG. 1, it may be configured in accordance with the arrangement of the speakers and the like shown in FIG.

  The sound control device 200 includes a first error microphone 21 disposed in the vicinity of the occupant (group) 1, a second error microphone 22 disposed in the vicinity of the occupant (group) 2, and a first sound source that outputs the first sound signal. 31 and a second sound source 32 for outputting a second sound signal. The first sound source 31 and the second sound source 32 may be a playback device such as a CD, a DVD, and an MD, a radio, a TV, and a navigation system.

  In addition, the sound control device 200 receives a noise canceling signal y1 (n) for canceling noise in the vicinity of the first summing unit 210 for generating a signal output from the first speaker 11 and the first error microphone 21. Based on a first LMS (least mean square) processing unit 221, a C1 circuit 222, a first adaptive filter 223, a C1 circuit 224, a second summing unit 225, and a second sound source 32 in the vicinity of the first error microphone 21 for generating A first fixed control unit 230 for generating a second sound cancellation signal z1 (n) for canceling the leakage sound is included. The circuits 222 and 224 are circuits for adding the spatial transfer characteristic C1.

  Furthermore, the sound control apparatus 200 receives a noise cancel signal y2 (n) for canceling noise in the vicinity of the third summing unit 250 for generating a signal output from the second speaker 12 and the second error microphone 22. The second LMS processing unit 251, the C1 circuit 252, the first adaptive filter 253, the C1 circuit 254, the fourth summing unit 255, and the leak sound based on the first sound source 31 in the vicinity of the second error microphone 22 are canceled. A second fixed control unit 260 for generating the first sound cancellation signal z2 (n) for the purpose. The circuits 252 and 254 are circuits for adding the spatial transfer characteristic C2.

  Next, generation of a noise cancellation signal y1 (n) for canceling noise in the vicinity of the first error microphone 21 in the sound control device 200 will be described.

  The first detection signal detected by the first error microphone 21 is e1 (n), the output of the C1 circuit 222 is r1 (n), the output of the C1 circuit 224 is hr1 (n), and the first adaptive filter 223 at time n. When the i-th coefficient is wn (i), the following equations (7) to (11) are established.

  Here, the spatial transfer characteristic in the space between the first speaker 11 and the first error microphone 21 is C1, the tap length of the equivalent filter from the first speaker 11 to the error microphone 21 is Nc, and the tap of the first adaptive filter 223 is The length is Nw, the leakage is leak, and the step size parameter of the first adaptive filter 223 is μ. In x (n), the part of hr (n) subtracted from e (n) corresponds to a howling canceller.

That is, a noise cancel signal for canceling noise in the vicinity of the first error microphone 21 by controlling the first adaptive filter 223 by the first LMS processing unit 221 so as to satisfy the filter update expression shown in Expression (11). y1 (n) can be output. Note that a second LMS processing unit 251, a C1 circuit 252, a first adaptive filter 253, a C1 circuit 254, and a noise canceling signal y2 (n) for canceling noise in the vicinity of the second error microphone 22 are generated. Since the operation of the fourth summing unit 255 is the same, the description thereof is omitted.
Next, generation of the second sound cancellation signal z1 (n) for canceling the leakage sound based on the second sound source 32 in the vicinity of the first error microphone 21 will be described.

  The second sound cancellation signal z1 (n) is generated by the first fixed control unit 230. The first fixed control unit 230 includes a fixed filter 231 and a phase inversion processing unit 232.

  The fixed filter 231 is designed based on a spatial transfer characteristic between the second speaker 12 and the first error microphone 21 measured in advance, and the second sound signal a2 (n) of the second sound source 32 is input thereto. Then, it is comprised so that the signal equivalent to the leak sound based on the 2nd sound source 32 in the 1st error microphone 21 vicinity can be output.

  The phase inversion processing unit 232 outputs a signal having a phase opposite to that of the signal corresponding to the leakage sound based on the second sound source 32 in the vicinity of the first error microphone 21 output from the fixed filter 231 in order to obtain a canceling sound. A cancel signal z1 (n) is output. The second fixed control unit 260 also includes a fixed filter 261 and a phase inversion processing unit 262, and outputs the first sound cancellation signal z2 (n), similar to the first fixed control unit 230. In this example, since a fixed filter is used instead of an adaptive filter to generate the second sound cancellation signal z1 (n) and the first sound cancellation signal z2 (n), the system is constructed on a small scale and at low cost. be able to.

  The first summation unit 210 is output from the first sound signal a1 (n) from the first sound source 31, the noise cancellation signal y1 (n) output from the first adaptive filter 223, and the first fixed control unit 230. The second sound cancellation signal z1 (n) is added and output to the first speaker 11. Therefore, the occupant (group) 1 can view only the sound based on the first sound signal from the first sound source 31.

  Similarly, the third summation unit 250 receives the second sound signal a2 (n) from the second sound source 32, the noise cancellation signal y2 (n) output from the second adaptive filter 253, and the second fixed control unit 260. The output first sound cancellation signal z2 (n) is added and output to the second speaker 12. Therefore, the passenger (group) 2 can view only the sound based on the second sound signal from the second sound source 32.

  In this way, the sound control apparatus 200 shown in FIG. 6 can cancel noise and leakage sound from other sound sources, so that a good personal acoustic environment can be realized.

2 is a diagram illustrating an arrangement example of speakers and the like in the vehicle 1. FIG. It is the figure which modeled the transmission characteristic of the sound to each passenger | crew in a vehicle. 1 is a schematic configuration diagram of a sound control device 10 according to the present invention. FIG. 4 is a diagram illustrating another arrangement example of speakers and the like in the vehicle 1. It is a one part schematic block diagram of the other sound control apparatus 100 which concerns on this invention. It is a schematic block diagram of the further another sound control apparatus 200 which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 1st speaker 12 2nd speaker 20 Noise sensor 21 1st error microphone 22 2nd error microphone 30 Noise source 31 1st sound source 32 2nd sound source 41 1st adaptive filter calculating part 43 1st adaptive filter 44 2nd adaptive filter calculation Unit 46 Second adaptive filter 51 Third adaptive filter arithmetic unit 53 Third adaptive filter 54 Fourth adaptive filter arithmetic unit 56 Fourth adaptive filter

Claims (10)

A first sound source that outputs a first sound signal;
A second sound source that outputs a second sound signal;
A sound detector;
A first control unit that controls to output a noise cancellation signal for canceling noise around the sound detection unit other than the first sound signal based on a detection signal detected by the sound detection unit;
A second control unit that controls to output a sound cancellation signal for canceling the sound based on the second sound signal based on the detection signal;
An output unit for outputting the first sound signal, the noise cancellation signal, and the sound cancellation signal;
A sound control apparatus comprising: A first adaptive filter;
The first control unit controls the first adaptive filter based on a spatial transfer characteristic between the sound detection unit and the output unit and a detection signal detected by the sound detection unit to control the noise cancellation signal. The sound control device according to claim 1, wherein It further has a noise detection unit that outputs a noise detection signal,
The sound control apparatus according to claim 2, wherein the first adaptive filter outputs the noise cancellation signal by modulating the noise detection signal. A second adaptive filter;
The second control unit controls the second adaptive filter based on a spatial transfer characteristic between the sound detection unit and the output unit and a detection signal detected by the sound detection unit to control the sound cancellation signal. The sound control device according to any one of claims 1 to 3, wherein   The sound control apparatus according to claim 4, wherein the second adaptive filter outputs the sound cancellation signal by modulating the second sound signal. A first adaptive filter;
The first control unit controls the first adaptive filter based on a spatial transfer characteristic between the sound detection unit and the output unit and a detection signal detected by the sound detection unit to control the noise cancellation signal. The sound control apparatus according to claim 1, further comprising a least mean square processing unit that outputs   The sound control apparatus according to claim 6, wherein the first adaptive filter outputs the noise cancellation signal by modulating a detection signal detected by the sound detection unit.   The sound control device according to claim 1, wherein the second control unit processes the second sound signal by a fixed filter and a phase inversion processing unit and outputs the sound cancellation signal. . The fixed filter is configured based on a second spatial transfer characteristic between the second output unit that outputs the second sound signal and the sound detection unit,
The sound control device according to claim 8, wherein the phase inversion processing unit inverts the phase of the second sound signal that has passed through the fixed filter. A first sound source that outputs a first sound signal for the first seat;
A second sound source that outputs a second sound signal for the second seat;
A first sound detector disposed in the vicinity of the first seat;
A second sound detector disposed in the vicinity of the second seat;
A first control unit that controls to output a first noise cancellation signal for canceling noise around the first sound detection unit based on a first detection signal detected by the first sound detection unit;
A second control unit that controls to output a second sound cancellation signal for canceling the sound based on the second sound signal based on the first detection signal;
A third controller for controlling to output a second noise cancellation signal for canceling noise around the second sound detector based on the second detection signal detected by the second sound detector;
A fourth control unit that controls to output a first sound cancellation signal for canceling the sound based on the first sound signal based on the second detection signal;
A first output unit that outputs the first audio signal, the first noise cancellation signal, and the second sound cancellation signal;
A second output unit for outputting the second audio signal, the second noise cancellation signal, and the first sound cancellation signal;
A sound control apparatus comprising:

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