Reverberation measurements in liquids
article
The ultrasonic absorption in liquids can be determined by measuring the decrease of the intensity in a progressive wave radiated by a suitable soundsource. Several methods can be used for this purpose, but difficulties arise) if the absorption is small e.g. < 1 dB/m. We have made measurements of such small absorptions, especially in water and aqueous solutions, with a reverberation method. Examples of analogous measurements have already been described by KNUDSEN [1] and MEYER [2]. The procedure would be very simple, if the sound absorption only took place in the liquid, but complications are caused by additional absorptions near and in the walls of the vessel containing the liquid. Nevertheless, this method offers promising possibilities for the measurement of small absorption coefficients.
TNO Identifier
270640
Source
Nuovo Cimento, 7(2, supplement), pp. 255-259.
Pages
255-259
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