A Study of Ringing Sound Generated with Wineglasses

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  • ワイングラスのリンギングの解明
  • ワイングラス ノ リンギング ノ カイメイ

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This paper analyzes the mechanism of frictional sound, “wine glass ringing,” caused by rubbing the rim of a wine glass with a wetted finger. We consider the following two cases. （1）The rim of a fixed glass（glass harp）rubbed at a certain speed with wetted finger, and（2）the rim of a rotating glass（glass harmonica）rubbed with a wetted finger. The sound was caused by the negative slope of frictional coefficient against sliding velocity between a glass and a wetted finger. The sound was caused by a light load, approximately 0.15N. With a larger load, the sound level becomes smaller. Furthermore, the sound frequency was close to the natural frequency of glass at the mode having two nodal meridians and having the minimum damping coefficient. On a simplified view, one might represent the wineglass as a thin-walled cylinder, attached to a rigid circular base. This model was in close agreement with the experiment results. Results were the same for experiments conducted on 16 kinds of vessels.

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