In this paper, two adapting schemes for gain factors of active noise equalizer in application of bass enhancement and engine noise cancellation are presented. The novel system can adaptively equalize the engine noise into a proper enhancement of the bass audio production in automobile cabin. Computer simulations are performed to verify the proposed schemes. In noise cancellation mode, a maximum of 3dB bass enhancement can be achieved with 6dB noise suppression. More than 6dB of bass enhancement can be achieved in the bass enhancement mode. The results showed that the proposed system could be a promising approach for solving the bass audio reproduction, together with the noise control problems in automobile.
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