Measurements of the attenuation of sound are reported for oxygen containing up to 2.6% of hydrogen, carbon dioxide or water vapour as impurity. The measurements cover the f/p range from 80 to 1700 Hz/atm and were made with a resonance tube system. The least‐squares fits to the results are given below, where 103h is the mole fraction of the impurity, and f0 is the frequency of maximum absorption.
Mixture Equation Standard error
O2‐H2 f0/p = −0.3+64.2h Hz/atm 9 Hz/atm
O2‐CO2 f0/p = 9+ 45h Hz/atm 70 Hz/atm
O2‐H2O f0/p = 9+162h+144h2 Hz/atm 26 Hz/atm
The results are compared with those of other workers, and in particular, it is suggested that the results of Harlow and Kitching are probably in error because they ignored the adsorption of water vapor on the walls of the tube.