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Measurement and Analysis of Interior Noise of Car
JIANG Jun;CHEN Jian
2011, 31 (6):
143-146.
DOI: 10.3969/j.issn.1006-1355-2011.05.032
The interior noise of a car in different conditions is tested according to our national standards. Using Fourier transform, the spectrum analysis is done for the signals and the critical frequency is obtained. It is found that in rapidly accelerating conditions, Fourier transform can only yield overall trends of the interior noise variation, and the detailed information cannot be obtained. Then, the “adaptive changes” time-frequency window structure of wavelet transform is used to gain the details of the signals and more frequency information.
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