Abstract
A method is described to precisely measure the sound velocity ofliquids. The construction of a resonator cell for the simultaneous measurementof a sample liquid and a reference liquid is presented. The non-idealproperties of the cavity resonators are carefully considered for a superiorevaluation of the resonance frequency data. Also presented is a low-pricedelectronic set-up, designed for the computer-controlled determination of thecomplex transfer functions of the cavity resonators and also for automatictemperature monitoring and control. Possible sources of errors are discussedand some representative results are presented in order to illustrate therepeatability of the method and the accuracy of the sound velocity datarelative to a reference liquid.
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