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In this paper we studied some acoustical parameters of a porous medium based on the Biot’s theory. The basic idea was to find, using an inversion method, variations in the bulk modulus K b and the shear modulus G b in the frequency domain. This was achieved by comparing the theoretical and experimental results obtained on a selection of porous alumina samples with different physical...
This paper focuses on the development of a finite-element model and subsequent stationary analysis performed to optimize individual flexural piezoelectric elements for operation in the frequency range of 20–100kHz. These elements form the basic building blocks of a viable, un-tethered, and portable ultrasound applicator that can produce intensities on the order of 100mW/cm 2 spatial-peak temporal-peak...
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