ARRAYING SPEAKERS FOR A UNIFORM DRIVER FIELD

摘要

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.

主权项

1. A noise cancellation system comprising:
three or more speakers disposed within an area; an amplifier in communication with the three or more speakers; and a system controller in communication with at least one microphone and the amplifier, the system controller producing a driver signal for each of the three or more speakers in response to a signal from the at least one microphone produced in response to sound detected within the area and communicating the driver signals to the amplifier, the amplifier applying each driver signal to drive a different one of the three or more speakers, the three or more speakers emitting sound that, in response to the driver signals, combined produces a substantially uniform sound pressure field for a particular zone within the area, the substantially uniform sound pressure field produced by the three or more speakers having a magnitude and phase adapted to attenuate a noise field corresponding to the sound detected by the at least one microphone.