超音波のエネルギー密度の媒体による影響

概要

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The ultrasonic wave produced by piezoelectric quartz plates in transformer oil was transmitted through the bottom of a glass vessel to the liquid contained in it and the radiation pressure of the ultrasonic wave was measured in the liquid with a ballance type pressure apparatus. The values of the high frequency current through the quartz transducer were obtained for various liquids while the radiation pressure was maintained at constant values in these liquids. The h. f. current required to produce a common acoustic radiation pressure in various liquids showed a very appreciable difference according to the characteristics of the liquid, and was found to be approximately proportional to the quantity √<ρ>・c of the liquid, where ρ means the density of the liquid and c the ultrasonic velocity in it. Theoretical interpretation of this phenomenon was also presented.
社団法人日本音響学会の論文
1952-01-30