Patent ID: 6359992
Filing Date: 2002-03-19
Classification: H03F,H04R

Abstract:
A device for conditioning acoustical energy in a signal, the device comprising:a circuit that selectively attenuates an undesired noise while selectively amplifies a desired sound in the signal, wherein the circuit includes an attenuating circuit that attenuates the undesired noise, wherein the circuit includes an amplification circuit to amplify the desired sound, wherein the circuit includes an actuation that selectively selects at least one of the attenuating circuit and the amplification circuit, wherein the actuation includes a switch that is controllable in at least an automatic mode, wherein the automatic mode is activated in response to a detection of at least one of the desired sound and the undesired noise, wherein the detection includes a comparison between a short-term average component of an input signal to a long-term component of the input signal.