Letter | Published:

A Simple Method of Demonstrating the Pressure of Sound

Nature volume 158, page 755 (23 November 1946) | Download Citation

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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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  1. Physics Branch, Military College of Science, Shrivenham, Near Swindon, Wilts. Oct. 18.

    • GILBERT D. WEST

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DOI

https://doi.org/10.1038/158755b0

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