Analysis of wavelet correlation between tyre sounds and tread patterns

This paper proposes analysis of wavelet correlation between tyre sounds and tread patterns. In the paper, wavelet analysis provides the visualization of tyre sounds in time-frequency domain and allows the tyre sounds to be analyzed in synchronization with tread patterns. We focus on the influence of variable lateral grooves´ pitches on the pipe resonance of a tyre sound. Based on the model that the amplitude of the resonant component is modulated by lateral grooves, the correlation between the pipe resonance and the pitch fluctuation is analyzed using wavelet transform. Consequently, the tread´s area on the circumference, which contacts the ground, is specified for each time point on the tyre sound data.