Patent ID: 6690800
Filing Date: 2004-02-10
Classification: H04R

Abstract:
An active acoustic silencing apparatus that works as or with the microphone of telephonic or transmitting communications equipment to maintain the privacy of a transmitting operator's speech and reduce noise in the area from said operator's speech comprising:a) a device having a microphone to receive operator originated acoustic signals composed of speech originating from an operator of said apparatus and producing a microphone signal, a signal processing circuit for amplifying and processing the microphone signal, creating electrical silencing signals, and amplifying said electrical silencing signals, and a loudspeaker or transducer for receiving the amplified electrical silencing signals from said signal processing circuit; b) said loudspeaker or transducer converting said electrical silencing signals to acoustic silencing signals; and c) said loudspeaker or transducer being positioned in front of and facing the transmitting operator's month position and said microphone located between the transmitting operator's mouth position and said loudspeaker or transducer so as to result in substantial cancellation of operator originated speech beyond a front face of said microphone.