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Here we report the observation of the inverse Doppler effects in a flute. Itis experimentally verified that, when there is a relative movement between thesource and the observer, the inverse Doppler effect could be detected for allseven pitches of a musical scale produced by a flute. Higher tone is associatedwith a greater shift in frequency. The effect of the inverse frequency shiftmay provide new insights into why the flute, with its euphonious tone, has beenpopular for thousands of years in Asia and Europe.

Inverse Doppler Effects in Flute