Abstract
SOUND, in common with other forms of radiation, exerts a pressure on the surface on which it impinges. Measurements of this pressure have been made by Altberg and others by means of sensitive torsion balances. While measurements necessarily involve a certain degree of elaboration, a simple demonstration of sound pressure can be given without difficulty. A small hole is made in the base (or even in the side wall near the base) of a cylindrical resonator which is filled with smoke. On presenting an appropriate tuning fork, smoke issues from the hole in a thin but definite stream, thus demonstrating the steady pressure that sound exerts. The experiment provides an attractive demonstration of an important property of radiation.
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WEST, G. A Simple Method of Demonstrating the Pressure of Sound. Nature 158, 755 (1946). https://doi.org/10.1038/158755b0
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DOI: https://doi.org/10.1038/158755b0
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