ACTIVE SILENCER AND METHOD OF CONTROLLING ACTIVE SILENCER

摘要

An active silencer comprises a speaker for generating control sound which interferes with noise, a microphone for detecting noise remaining after the interference as a remaining noise signal, a sound quality evaluating unit for evaluating the sound quality of the remaining noise and outputting the result of the sound quality evaluation, an actuating signal determining unit for determining, according to the result of the sound quality evaluation, the detection timing of the frequency component of the remaining noise signal which is used when the control sound is generated for each of bands of the remaining noise corresponding to the respective bands of a reference signal corresponding to the noise, and a control signal generating unit for generating a control signal to generate the control sound depending on the determined bands of the remaining noise signal and the bands of the reference signal corresponding to the noise.