Abstract

The paper is an overview of a theory and experimental methods used in acoustic spectroscopy. Theoretical discussion about the ultrasonic relaxation process related to energy transfer between translational and vibrational degrees of freedom as well as to the existing of chemical isomerism is presented. Two basic ultrasonic measurements methods of absorption and velocity in very wide frequency range from hundreds kHz to tens GHz are described. Several experimental examples of advantage of the ultrasonic spectroscopy are also shown.

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