The Dispersion of Sound in Oxygen

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Abstract
The velocity of 1000‐cycle sound wave in oxygen of various degrees of humidity at 26.5°C has been measured. The velocity behavior indicates that the water molecules are effective in bringing the heat capacity of the first vibrational state of the oxygen molecule into equilibrium with the sound wave. The dispersion change in velocity amounts to 0.16 percent. Intensity measurements agree with velocity data in fixing the center of the dispersion region between 1 and 3 mm partial pressure of water, which is in agreement with the values calculated from Knudsen's studies of rates of decay at higher frequencies.