Abstract
The noise sources were tested and analyzed by SQLab II system on one typical motorcycle. The states of sound pressure levels are predicted by the synthesized transmission route method on different noise sources which are located at the standard position. Compared with different shield states, the results show that noise from the exhaust system is the main source and noise in high-frequency not only makes great contribution to all noises about sound quality, but also has bad influence on people’s subjective judgment.
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