A Subband Active Noise Control System with Automatic Tap Assignment in Consideration of Psychoacoustic Properties

This paper proposes a high-performance subband active noise control (ANC) system in consideration of psychoa-coustic properties. In conventional subband ANC using a tap assignment algorithm, excessive tap lengths are assigned to certain subbands in the initial stage of noise control update, resulting in poor reduction performance. Another problem is that the audible impression of the sound actually attenuated by ANC becomes smaller than the numerical noise reduction. This is due to the complex interplay of psychoacoustic characteristics. In this study, we propose a new algorithm that takes into account the error signal power in the conventional algorithm to prevent excessive tap assignment and improve the attenuation performance of subband ANC. Furthermore, we construct a subband ANC considering psychoacoustic properties and verify its noise reduction performance in human hearing.