Abstract
A new way to obtain the acoustic absorption coefficient in liquids by an optical method, making use of standing ultrasonic waves. Some results are given, in good agreement with the experimental results of other authors who worked with different methods at the same frequency and temperature. A noteworthy exception is the case of Benzol, for which we obtained a value much lower (about a sixth) than the generally accepted experimental value. We wish to point out here that Benzol exhibited the strongest anomalies of the experimental absorption coefficient compared with the theoretical values. Our result approximates better the ideal value.
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