Acoustic Sensing Response in Human Tissues for Theranostics and Implants

This letter investigates the impacts of high- and low-frequency acoustic waves on various human tissues. It is observed that low-frequency (4.6 kHz) acoustic energy works as a better alternative for acoustic power distribution across the tissues. Using a 4.6 kHz piezoelectric diaphragm transmitter and receiver, finite-element simulation was performed, and then, an experimental examination was done to evaluate the energy distribution. The average electrical output voltage produced by the low-frequency transducers was 0.758 V in the male subject's palm, 0.187 V in the wrist, and 0.015 V close to the elbow region. In comparison, it was 1.27 V in the female subject's palm, 0.534 V in the wrist, and 0.146 V close to the elbow region. The low-frequency response of the sensors was found to be equal to or a maximum of 39.7% better than that of the high-frequency alternative. The obtained output voltage can be used to power medical implants and extract medical data at great depths with minimal attenuation.

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