Abstract
A method for measuring the acoustical attenuation coefficient ofliquids in the frequency range 12.5-150 kHz is described. Details of theeasy-to-obtain spherical resonator cells with comparatively small samplevolume (⩽1 l) are shown and a favourable measuring procedure ispresented. Particular attention is paid to the resonator transfer function,including higher order vibration modes. Possible sources of error arediscussed and a procedure for an adequate evaluation of data is given.The usability of the method is illustrated by reference measurements onaqueous solutions of manganese sulphate and of the monosaccharide D-fructose.
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