These polished polyacrylate blocks are used to investigate multiple echoes and measure frequency-dependent attenuation.
A 4 MHz transducer (U10017) is especially suitable for such measurements. An echo pattern comprising at least 3 echoes is recorded, and the spectra of the individual echoes analyzed. The result of the analysis is a shift in the average frequency toward lower frequencies, due to a stronger attenuation of the signal's high-frequency components.
Dimensions: 80x40x10 mm³
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