ACTIVE NOISE-REDUCTION APPARATUS

摘要

According to one embodiment, an active noise-reduction apparatus includes following units. The reference signal generation unit generates different reference signals based on target sound generated from a sound source. The filter processing unit generates first control signals by filtering the reference signals using first digital filters. The averaging unit generates a second control signal by averaging the first control signals. The control speaker outputs the second control signal as control sound. The error microphone detects a synthetic sound pressure of the target sound and the control sound to generate an error signal. The filter update unit updates the first digital filters so that the error signal is minimized.

主权项

1. An active noise-reduction apparatus comprising:
a reference signal generation unit configured to generate a plurality of reference signals based on target sound generated from a sound source; a first filter processing unit configured to generate a plurality of first control signals by filtering the plurality of reference signals using a plurality of first digital filters; an averaging unit configured to generate a second control signal by averaging the plurality of first control signals; a control speaker configured to output the second control signal as control sound; an error microphone configured to detect a synthetic sound pressure of the target sound and the control sound, and to generate an error signal indicating the detected synthetic sound pressure; and a filter update unit configured to update the plurality of first digital filters so that the error signal is minimized.