Effect of a reflecting surface on the global power reduction performance of multichannel ANC systems

Publication Type:
Conference Proceeding
Citation:
ICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics, 2016
Issue Date:
2016-01-01
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Active noise control techniques can be used for global sound radiation control problems. In practice, multichannel systems are usually installed with the presence of reflecting surfaces. This paper deals with the global sound power reduction of multichannel ANC systems with a reflecting surface. The position of the secondary sources is optimized by employing a genetic searching algorithm and the effect of the reflecting surface on the optimal power reduction performance is discussed. It is found that the noise reduction performance can be improved by adopting a reflecting surface close to the primary source at frequencies. Based on the mechanism that the sound pressure contributed by the secondary sources at the primary source is greatly enhanced by the reflecting surface, the position effect of the reflecting surface is further investigated.
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