Transactions of Society of Automotive Engineers of Japan
Online ISSN : 1883-0811
Print ISSN : 0287-8321
ISSN-L : 0287-8321
Technical Paper
Analysis Method for Rain Noise Reduction
Kei IchikawaMoe HanashimaKousaku TomozawaHiromichi Ebisawa
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2020 Volume 51 Issue 5 Pages 800-805


The purpose of this study is to establish a method for efficiently reducing interior rain noise. We measured excitation forces caused by rainfalls and found that the frequency characteristics of the forces do not have prominent peaks. Thus, it is concluded that rain noise performance is determined by noise transfer functions between ear position and various points on the roof panel. We proposed a simulation method of rain noise and investigated efficient countermeasures by the simulation. The effectiveness of the countermeasures was verified by comparison with actual measurements.

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© 2020 Society of Automotive Engineers of Japan, Inc.
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