A first cancellation signal output from a first speaker cancels noise at a first cancellation point, which is a typical position of the right ear of a user, together with a second cancellation signal output from a second speaker. In addition, the second cancellation signal output from the second speaker cancels noise at a second cancellation point, which is a typical position of the left ear of the user, together with the first cancellation signal output from the first speaker. The first speaker and the second speaker are arranged side by side on a second line segment, which passes through the midpoint of a first line segment connecting the first cancellation point and the second cancellation point to each other and is perpendicular to the first line segment, and a range where the relationship between noise and the first cancellation signal and the second cancellation signal is the same as that at the cancellation point is extended.

Provided is an information processor including a signal processing section that acquires a first signal to be detected by an acoustic input section of a first unit including the acoustic input section disposed within a predetermined distance from one ear hole of a user in a state of being worn by the user, acquires a second signal, which indicates a noise generated from a noise source, to be acquired by a second unit, and generates a noise cancellation signal directed to the noise on the basis of the first signal and the second signal.

A first cancellation signal output from a first speaker cancels noise at a first cancellation point, which is a typical position of the right ear of a user, together with a second cancellation signal output from a second speaker. In addition, the second cancellation signal output from the second speaker cancels noise at a second cancellation point, which is a typical position of the left ear of the user, together with the first cancellation signal output from the first speaker. The first speaker and the second speaker are arranged side by side on a second line segment, which passes through the midpoint of a first line segment connecting the first cancellation point and the second cancellation point to each other and is perpendicular to the first line segment, and a range where the relationship between noise and the first cancellation signal and the second cancellation signal is the same as that at the cancellation point is extended.

[Object] There is proposed a mechanism that allows for a higher noise cancellation effect by operating a plurality of units in coordination. [Solution] An information processor including a signal processing section that: acquires a first signal to be detected by an acoustic input section of a first unit including the acoustic input section disposed within a predetermined distance from one ear hole of a user in a state of being worn by the user; acquires a second signal, which indicates a noise generated from a noise source, to be acquired by a second unit; and generates a noise cancellation signal directed to the noise on the basis of the first signal and the second signal.

In a directionality control system, a camera device captures a video of image capture area. A microphone array device collects a sound in image capture area. A signal processing section detects a sound source of the sound in image capture area, which is collected by the microphone array device. In a case where the detected sound source is within a range of privacy area, an output control section controls the sound in image capture area, which is collected by the microphone array device and is output from speaker device.

An exemplary sound reproducing, noise reducing method and system include supplying to a corresponding loudspeaker a useful signal that represents sound to be reproduced and an anti-noise signal that, when reproduced by the corresponding loudspeaker, reduces noise in the vicinity of the corresponding microphone. The method and system further include receiving audio input signals and processing the audio input signals to provide the useful signals so that the useful signals provide a more realistic sound impression for a listener wearing the helmet than the audio input signals.

A method and system for a noise cancellation comprises an amplifier in communication with three or more speakers disposed in an area. A system controller produces a driver signal for each of the speakers in response to a signal from at least one microphone detecting sound in the area and communicates the driver signals to the amplifier. The amplifier drives each speaker with the driver signal produced for that speaker. In response to the driver signals, the speakers emit sound having a magnitude and phase that combine to attenuate a noise field in the area.

A method and system for a noise cancellation comprises an amplifier in communication with the three or more speakers disposed in an area. A system controller produces a driver signal for each of the speakers in response to a signal from at least one microphone detecting sound in the area and communicates the driver signals to the amplifier. The amplifier drives each speaker with the driver signal produced for that speaker. In response to the driver signals, the speakers emit sound that combined produces a substantially uniform sound pressure field for a particular zone within the area. The substantially uniform sound pressure field produced by the speakers has a magnitude and phase adapted to attenuate a noise field in the area corresponding to the sound detected by the at least one microphone.

In a directionality control system, a camera device captures a video of image capture area (SA). A microphone array device collects a sound in image capture area (SA). A signal processing section detects a sound source of the sound in image capture area (SA) which is collected by the microphone array device. In a case where the detected sound source is within a range of privacy area (PRA), an output control section controls the sound in image capture area (SA) which is collected by the microphone array device and is output from speaker device (37).

An exemplary sound reproducing, noise reducing method and system include supplying to a corresponding loudspeaker a useful signal that represents sound to be reproduced and an anti-noise signal that, when reproduced by the corresponding loudspeaker, reduces noise in the vicinity of the corresponding microphone. The method and system further include receiving audio input signals and processing the audio input signals to provide the useful signals so that the useful signals provide a more realistic sound impression for a listener wearing the helmet than the audio input signals.