Patent ID: 6108427
Filing Date: 2000-08-22
Classification: G10K,H04B,H04R,H04S

Abstract:
A system for eliminating audio feedback, comprising:at least one speaker member;at least one microphone means for detecting at least one sonic frequency emitted from the speaker member and for generating an electrical signal representative of the at least one sonic frequency;processing means coupled to the microphone means for receiving the electrical signal wherein the processing means comprises the following parametric speaker components in which all signals received from the microphone are processed as a single wave form for parametric output through said parametric speaker components;a) ultrasonic frequency/generating means for generating a first ultrasonic frequency;b) modulating means coupled to the ultrasonic frequency generating means and the processing means for generating a new wave form electronically which includes the at least one first and second ultrasonic frequency having a difference in value equal to the at least one sonic frequency; andc) at least one ultrasonic frequency emitter coupled to the modulating means and the speaker member for concurrently propagating from a common emitter face (i) the first ultrasonic frequency and (ii) the at least one second ultrasonic frequency which interacts with the first ultrasonic frequency within a compressible transmission medium to thereby generate the at least one sonic frequency free of audio feedback.