Abstract
The meaning and importance of ultrasonic experiments under high pressure were pointed out, and some examples of sound velocity and sound attenuation measurements in solids under hydrostatic pressure were briefly cited. Special emphasis was put on explaining details of our attenuation experiment by a pulse reflection method for a solid in pressurized fluid, and origins of sound losses other than true energy loss in the specimen solid were fully discussed. An experiment to determine the pressure dependence of damping of dislocation motion in crystals was referred as an illustration.
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