Abstract

The traditional signal processing method such as FFT (Fast Fourier Transform) is often used to study on tire noise. When use this method to analyze the tire noise, it needs to assume that the tire noise is a stationary signal. But it’s inappropriate if the noise is analyzed for finding the relation between the tire sounds and the tread patterns. Because pattern pitches will actually change during tire rotation, the tire noise is non-stationary signal in a rotating cycle. The frequency spectrum of the tire noise is synchronized with the tread pattern pitch in the time axis. Therefore, time-frequency analysis method is needed. In this paper, wavelet transform is used for the analysis of tire noise.

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