Applied Physics Letters

Remote sensing of airborne thermoacoustic signals induced by radiofrequency excitation in biological tissue, saline, and steel

G Gil Gelbert (Andrew and Erna Viterbi Faculty of Electrical & Computer Engineering, Technion - Israel Institute of Technology 1 , Haifa 32000,) E Evgeny Kamenetsky (Andrew and Erna Viterbi Faculty of Electrical & Computer Engineering, Technion - Israel Institute of Technology 1 , Haifa 32000,) Y Yoav Hazan (Andrew and Erna Viterbi Faculty of Electrical & Computer Engineering, Technion - Israel Institute of Technology 1 , Haifa 32000,) O Oleg Belozerov (Department of Physics, Technion - Israel Institute of Technology 2 , Haifa 32000,) Y Yakov Krasik (Department of Physics, Technion - Israel Institute of Technology 2 , Haifa 32000,) A Amir Rosenthal (Andrew and Erna Viterbi Faculty of Electrical & Computer Engineering, Technion - Israel Institute of Technology 1 , Haifa 32000,)

Abstract

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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Article Details

Volume / Issue Vol. 127, Issue 13
Published September 30, 2025
ISSN 0003-6951
Publisher American Institute of Physics

Journal Info

Applied Physics Letters

American Institute of Physics
ISSN: 0003-6951 Physical Sciences

Authors (6)

G

Gil Gelbert

Andrew and Erna Viterbi Faculty of Electrical & Computer Engineering, Technion - Israel Institute of Technology 1 , Haifa 32000,

E

Evgeny Kamenetsky

Andrew and Erna Viterbi Faculty of Electrical & Computer Engineering, Technion - Israel Institute of Technology 1 , Haifa 32000,

Y

Yoav Hazan

Andrew and Erna Viterbi Faculty of Electrical & Computer Engineering, Technion - Israel Institute of Technology 1 , Haifa 32000,

O

Oleg Belozerov

Department of Physics, Technion - Israel Institute of Technology 2 , Haifa 32000,

Y

Yakov Krasik

Department of Physics, Technion - Israel Institute of Technology 2 , Haifa 32000,

A

Amir Rosenthal

Andrew and Erna Viterbi Faculty of Electrical & Computer Engineering, Technion - Israel Institute of Technology 1 , Haifa 32000,

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