<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
EP0533680(A4)
申请公布日期
1994.05.25
申请号
EP19910905557
申请日期
1991.02.26
申请人
ACTIVE NOISE AND VIBRATION TECHNOLOGIES INC.
发明人
CAIN, JOHN, J.;CHAIT, JAIME;DYE, DAVID;BARNES, DENNIS