Mechanisms of friction-induced sound

Many sounds around us are generated by friction. Musical instruments such as the violin and kokyu use friction to create beautiful sounds; brake squeal and bearing rubbing sounds are examples of unwanted friction-induced noise. Although musical sound and noise have been studied extensively for individual applications, questions remain about how friction-induced vibration originates at the interface, propagates through a body and produces sound. We investigate these mechanisms in both point and area contacts.

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