Adaptive noise reduction circuit for a sound reproduction...

Details Adaptive noise reduction circuit for a sound reproduction... Adaptive noise reduction circuit for a sound reproduction...

H - Electricity

04

R

H04R 25/00 (2006.01) G10L 21/02 (2006.01)

Patent

CA 2090297

A noise reduction circuit for a hearing aid having an adaptive filter for producing a signal which estimates the noise components present in an input signal. The circuit includes a second filter for receiving the noise-estimating signal and modifying it as a function of a user's preference or as a function of an expected noise environment. The circuit also includes a gain control for adjusting the magnitude of the modified noise-estimating signal, thereby allowing for the adjustment of the magnitude of the circuit response. The circuit also includes a signal combiner for combining the input signal with the adjusted noise-estimating signal to produce a noise reduced output signal.

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