A method to measure phase velocity and attenuation of compressional and shear waves has been developed using a broadband through-transmission technique. Two pairs of transducers were used, one pair with center frequency 5 MHz (Olympus C309-SU), and the other pair with center frequency 10 MHz (Olympus V327-SU). The method was tested on the homogeneous material Polymethylmethacrylate (PMMA) and the composite material Eccosorb MF-117. Our results were compared with published values for the PMMA material, showing a good agreement with literature, hence, verifying the accuracy of our method. In addition, the temperature in the sample was varied from 19 °C to 37 °C, to investigate how this influences the parameters. A small variation of around 3% was found for the phase velocity, while the temperature influence on the attenuation was considerably larger, increasing 30% when temperature was changed from 19 °C to 37 °C. These acoustic properties and their temperature effects are essential for transducer designs, especially for clinical applications.
Measurements of Acoustic Material Properties Using Ultrasonic Through Transmission Technique
Hoa T. K. Tran, Tung Manh, Lars Hoff; Measurements of Acoustic Material Properties Using Ultrasonic Through Transmission Technique. Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 1 July 2016; 2016 (NOR): 7–11. doi: https://doi.org/10.4071/2016-NOR-Tran
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