Broadband ultrasonic absorption measurements using optical beam deflection
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概要
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Optical beam deflection method is used for real-time measurements of ultrasonic a absorption in the frequency range 3 to 40 MHz in liquids. A laser beam is deflected by broadband ultrasonic pulse excited with a 1 MHz-quartz transducer, and the deflection signal is spectral analyzed. The dependence of the spectrum on sound-propagation distance gives absorption coefficients at several harmonic frequencies of the quartz. Absorption spectrum is obtained in benzene, o-xylene and carbon disulfide.
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