The sound generated by a transverse impact of a ball on a circular plate

概要

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The purpose of this investigation is to get a fundamental theory for the reduction of impact noise. The sound caused by the impact of a ball on a relatively thin circular plate clamped at its edge was investigated experimentally and theoretically and the theoretical results almost agreed with experimental results. The impact sound in this paper is due to the forced vibration of the plate. The forced vibration problem was solved with consideration of the damping of the plate and Hertz's contact theory was also introduced to analyze the impact phenomenon. The impact force was calculated by the small increment method and the sound pressure was calculated by assuming that the point sources were distributed all over the plate surface. The influence of both impact duration and maximum impact force on the impact sound were investigated and it was found that the impact sound pressure level depends on the amplitude of the impact force histories and the frequency components of the impact sound pressure depend on the impact duration.
社団法人日本音響学会の論文