<p>A noise cancellation system, comprising a symmetrical assembly of microphone inputs is disclosed. A controller receives the output of the microphone assembly and generates an electrical cancellation signal having a polarity opposite the polarity of a portion of a noise to be cancelled and a magnitude equal to the magnitude of the portion of the noise to be cancelled. An actuator receives the electrical cancellation signal and outputs an audio cancellation signal.</p>
申请公布号
DK0533680(T3)
申请公布日期
1999.07.19
申请号
DK19910905557T
申请日期
1991.02.26
申请人
NOISE CANCELLATION TECHNOLOGIES, INC.
发明人
CAIN, JOHN, J.;CHAIT, JAIME;DYE, DAVID;BARNES, DENNIS