The velocity of sound in gases in tubes

Abstract

The main objects of the series of experiments described in the present paper were two-fold: ( a ) to make precision measurements, over a moderate tempera­ture-range, of the velocity of sound-waves in gases contained in resonating tubes; ( b ) to investigate the applicability of the Helmholtz-Kirchhoff expression for the relation between the “tree-space” velocity and the “tube” velocity in a gas. As regards ( b ) different observers in the past have reached diverse con­clusions as to the dependence of tube-velocity on the frequency, on the roughness of the wall surface, and on the nature of the material of the tube.