Abstract

This work describes a method for 'Fn vitro determination of ultrasound velocity in liquids and small soft tissue or liquid samples using phase measurements, including details of the apparatus and the procedure as well as preliminary results. The phase measurements are obtained by varying t he acoustic path of a stabilized continuous sinusoidal wave between two immersed piezoelectric transducers. For small soft tissue or liquid samples, the two transducers are kept fixed in a reference liquid and the variations in acoustic path are obtained by moving, perpendicular to it, a precisely shaped wedged plexiglass sample container.

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