Singing sands, squeal sounds and the stick-slip effect, a brief review
Tom Patitsas · Lu Zone Ul (Laurentian University) · 2013
A pleasant sound can be produced, with dominant frequency, f d ≈ 700 Hz and harmonics of f d , when a finger, wetted with water, is drawn over a smooth surface such as a glass surface.It can be argued that the sound emission is due to vibrations in the finger skin, a few mm in thickness, when forced to slide over the glass surface.No sound can be produced when the same finger is wetted with a cooking oil.Naturally, the intense sound emission begs the question as to the mechanism that can