Automatic sound controlling apparatus

Details Automatic sound controlling apparatus Automatic sound controlling apparatus

H - Electricity

04

R

H04R 3/00 (2006.01) G10K 11/178 (2006.01)

Patent

CA 2074295

An automatic sound controlling apparatus including a first adaptive filtering means that forms a compensating signal for canceling a stationary sound, a signal producing means that produces a predetermined shape signal based on a timing signal with respect to a sound, a second adaptive filtering means that forms a compensating signal for canceling a fluctuating sound by the predetermined shape signal , whereby in the case that a sound period changes sharply, an output signal of the second adaptive filtering means is output in stead of the first adaptive filtering means.

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