NOISE CONTROL APPARATUS, NOISE CONTROL SYSTEM, NOISE CONTROL METHOD, AND PROGRAM
Provided is a noise control apparatus and the like capable of enhancing suppression performance as compared with a conventional noise control apparatus without enlarging or complicating each device in a case where noise control apparatuses are installed in respective areas such as seats in the same moving body such as a train or an airplane. The noise control apparatus performs active noise control. The noise control apparatus has suppression information that is related to noise suppression and is common to another noise control apparatus, which is disposed in the same moving body, corresponding to a reference microphone different from a reference microphone of the noise control apparatus, and suppresses noise using the common suppression information.
1 . A noise control apparatus for performing active noise control,
wherein the noise control apparatus has suppression information that is information related to noise suppression and is common to another noise control apparatus that is disposed in a same moving body and corresponds to a reference microphone different from a reference microphone of the noise control apparatus, and suppresses noise using the common suppression information.
2 . The noise control apparatus according to claim 1 ,
wherein the noise control apparatus uses suppression information of another noise control apparatus corresponding to a more front area than an area corresponding to the noise control apparatus with respect to a traveling direction of the moving body.
3 . A noise control system comprising N noise control apparatuses configured to perform active noise control,
wherein the N noise control apparatuses respectively correspond to N reference microphones arranged in a same moving body,
the noise control apparatus generates a cancellation signal for suppressing noise by using a sound collection signal of a corresponding reference microphone and a model,
the noise control system further comprises a suppression information sharing unit configured to receive suppression information from a certain noise control apparatus and output, to another noise control apparatus, suppression information to be used in the another noise control apparatus in the suppression information, and
the another noise control apparatus corresponding to a rear area uses the suppression information of the certain noise control apparatus corresponding to a front area with respect to a traveling direction of the moving body.
4 . The noise control system according to claim 3 ,
wherein the noise control apparatus includes processing circuitry configured to execute a determination processing in which the processing circuitry unit determines whether active noise control operates stably or not by using a cancellation signal reproduced by a cancellation speaker, and
the suppression information includes at least one of:
(i) a sound collection signal of a reference microphone;
(ii) a cancellation signal reproduced by the cancellation speaker;
(iii) a result of determination by the determination processing; or
(iv) a model used for generating a cancellation signal from a sound collection signal of a reference microphone.
5 . A noise control method that uses a noise control apparatus configured to perform active noise control,
wherein the noise control apparatus has suppression information that is information related to noise suppression and is common to a noise control apparatus that is disposed in a same moving body and corresponds to a reference microphone different from a reference microphone of the noise control apparatus, and suppressing noise using the common suppression information.
6 . The noise control method according to claim 5 ,
wherein the noise control method uses a noise control system including N noise control apparatuses configured to perform active noise control,
the N noise control apparatuses respectively correspond to N reference microphones arranged in a same moving body,
the noise control apparatus generates a cancellation signal for suppressing noise by using a sound collection signal of a corresponding reference microphone and a model,
the noise control system further includes a suppression information sharing unit configured to receive suppression information from a certain noise control apparatus and output, to another noise control apparatus, suppression information to be used in the another noise control apparatus in the suppression information, and
the another noise control apparatus corresponding to a rear area uses the suppression information of the certain noise control apparatus corresponding to a front area with respect to a traveling direction of the moving body.
7 . The noise control apparatus according to claim 1 ,
wherein the noise control apparatus predicts a sound collection signal to be collected in future by a reference microphone of the noise control apparatus by using a sound collection signal collected by a reference microphone different from the reference microphone of the noise control apparatus, and generates a cancellation signal for suppressing noise by using the predicted sound collection signal.
8 . The noise control method according to claim 5 , further comprising:
predicting a sound collection signal to be collected in future by a reference microphone of the noise control apparatus used in the noise control method by using a sound collection signal collected by a reference microphone different from the reference microphone of the noise control apparatus used in the noise control method; and generating a cancellation signal for suppressing noise by using the predicted sound collection signal.
9 . A non-transitory computer-readable recording medium having recorded thereon a program for causing a computer to function as the noise control apparatus according to claim 1 .