ID Number		1996
Study Type		Engineering & Physics
Model		Microwave exposure and numerical modeling of microwave hearing due to thermoelastic expansion of tissue in the head.
Details		Theoretical model for evaluating sound waves generated in the head due to microwave exposure and microwave hearing due to the resulting thermoelastic expansion. The authors model a spherical head and a use case of microwave absorption concentrated near the sphere surface. They report that for equivalent SAR levels, the sound intensity is comparable to heating from the center of the sphere. AUTHORS' ABSTRACT: Yitzhak et al. 2014 (IEEE #5697): The pressure waves developing at the cochlea by the irradiation of the body with a plane wave microwave pulse are obtained by numerical simulation, employing a two-step finite-difference time-domain (FDTD) algorithm. First, the specific absorption rate (SAR) distribution is obtained by solving the Maxwell equations on a FDTD grid. Second, the temperature rise due to this SAR distribution is used to formulate the thermoelastic equations of motion, which are discretized and solved by the FDTD method. The calculations are performed for anatomically based full body human models, as well as for a head model. The dependence of the pressure amplitude at the cochlea on the frequency, the direction of propagation, and the polarization of the incident electromagnetic radiation, as well as on the pulse width, was investigated.
Findings		Not Applicable to Bioeffects
Status		Completed With Publication
Principal Investigator		Rad Safety Div. Soreq NRC, Ben-Gurion Univ, Israel - ruppin@ soreq.gov.il
Funding Agency		Private/Instit.
Country		ISRAEL
References		Yitzhak, NM et al. Phys Med Biol., (2009) 54:4037-4049 Yitzhak, NM et al. Bioelectromagnetics., (2014) 35:491-496
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