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An effective method for material characterization with a scanning acoustic microscope (SAM) is presented. The elastic parameters Young's modulus and bulk modulus and the density are determined from one single reflection signal. In contrast to established methods a calibration specimen is not required. Additionally, the thickness of the specimen can be estimated with two reflection signals at different...
In this paper, we describe a new, high-frequency, time-resolved scanning acoustic microscope developed for studying dynamical processes in biological cells. The new acoustic microscope operates in a time-resolved mode. The center frequency is 0.86 GHz, and the pulse duration is 5 ns. With such a short pulse, layers thicker than 3 mum can be resolved. For a cell thicker than 3 mum, the front echo and...
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