Sur L'interféromètre ultrasonore à deux transducteurs et la spectroscopic à fréquence continûment variable

Equations of a previous paper are applied to the variable path ultrasonic interferometer with two transducers. It is shown that the simple measuring procedure proposed by Musa to determine absorption coefficients of liquids at the harmonics of the transducers is applicable outside these particular frequencies, and that it is therefore possible to carry out ultrasonic spectroscopy at continuously varying frequency. The positions of the receiver giving maxima or minima of the electric potential are indicated.