Attenuation of Tire Cavity Noise Using Active Noise Cancellation in a Car

초록

This study proposesa new method for active noise cancellation(ANC) of cavity noise of a tire. A general method for ANC of road noise is to use several accelerometers for acquirement of reference signals. Cavity noise of tire is caused by the resonance of tire cavity mode. Resonance frequencies of tire cavity are determined by the cavity structure of tire. Therefore, harmonic sinusoidal signals can be used for reference signals. However,resonance frequencies could be varied due to small change of tire cavity during driving of a car. For the overcome of this variation, adaptive filter of ANC system was designed and applied to the ANC of a cavity noise. The proposed method didnot need accelerometers for the ANC of cavity noise and practically was applied to the ANC of cavity noise of a tire in a car. Cavity noise of a test was attenuated to 3-5dBA and effect of reduction was similar to passive method like resonant type tire. © 2022 KSAE.

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