UNTRANSLATED .. 5.3

Sound beats

Objective

Study the interference of sound from two individual sources. Two Piezo buzzers are powered by two different sources, and the sound is directed towards the microphone.

_images/sound-beats.svg

Procedure

Discussion

From figure it can be seen how the low frequency envelope is created. Distance between two minimum pressure points., of the envelope, corresponds to the beat wavelength. The Fourier transform of the output is shown in figure .