Präzisionsmessung der klassischen Schallabsorption mit Hilfe des Zylinderresonators (I)

An arrangement for the accurate measurement of the sound absorption in gases with the help of resonances inside a cylindrically shaped vessel is described. Measurements of the classical wall and volume effects of the sound absorption in argon, nitrogen, and water vapour in the frequency pressure range 10³ to 10⁶c/s-atm show good agreement with Kirchhoff's theory, if sound excitation and rigid closure of the vessel at all sides are properly taken into consideration. (Compare part II of this work.) In contrast to many former measurements, those reported here confirm Kirchhoff's theory and form a dependable basis for the determination of the “super-classical” sound absorption.