Study demonstrates remote sensing of thermoacoustic signals from biological tissue and conductive materials, indicating innovative applications in remote communication.
We demonstrate remote thermoacoustic detection of biological tissue and conductive materials using pulsed RF excitation and audible-range acoustic sensing. Short RF pulses (4.5 μs, 2.865 GHz, 275 kW) generated wideband acoustic signals, which were detected by a calibrated microphone at distances of over 1 m through obstructions. Distinct acoustic signatures were recorded for tissue, saline, steel, and RF absorber targets. Surface measurements indicate that signal amplitudes are sufficient for unaided auditory perception. These results support the feasibility of non-contact RF-thermoacoustic signal generation for remote sensing and communication.
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Gelbert et al. (2025) studied this question.
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