Abstract
This paper concerning the absorption of sound in air as a function of humidity presents new data in the frequency range between 2000 and 12 500 cps. These data are for air at normal atmospheric pressure and at a temperature of 20°C. First the measurement system is described. Then the data are compared with theory and with other published results in the same frequency range. The data also are presented in a graphical form that is particularly convenient for use in computing the contribution of air absorption to the total absorption of sound in a room. In this form the data are plotted directly in terms of the quantity 4mV as a function of frequency and humidity, where m is the attenuation coefficient and V is the volume of the room.
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