Noise control device and noise control method

摘要

To provide a noise reduction control apparatus capable of exercising noise reduction control in response to a change of an acoustic property in a noise reduction region. The apparatus includes one or more reference sensors for detecting a noise signal produced by a noise source, one or more sound emitting sources for emitting a noise reduction signal and an identification signal, an error sensor for detecting the noise signal, noise reduction signal, and identification signal, identification means for carrying out an identification operation of identifying an acoustic property in a noise reduction region based on the identification signal detected by the error sensor, and noise reduction signal generating means for generating the noise reduction signal by adaptive signal processing based on the detection by at least one of the reference sensors and the detection by the error sensor. The identification means carries out the identification operation while at least one of the sound emitting sources emits the noise reduction signal.