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The microwave auditory effect, also known as the microwave hearing effect or the Frey effect, consists of the human perception of sounds induced by pulsed or modulated radio frequencies. The perceived sounds are generated directly inside the human head without the need of any receiving electronic device.
SAR limits set by law do not consider that the human body is particularly sensitive to the power peaks or frequencies responsible for the microwave hearing effect. [4] [5] Frey reports that the microwave hearing effect occurs with average power density exposures of 400 μW/cm 2, well below SAR limits (as set by government regulations). [4] Notes:
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Since 1962, the microwave auditory effect or tinnitus has been shown from radio frequency exposure at levels below significant heating. [34] Studies during the 1960s in Europe and Russia claimed to show effects on humans, especially the nervous system, from low energy RF radiation; the studies were disputed at the time. [35] [36]
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According to the U.S. Navy in 2004, the system would be "portable, low power, have a controllable radius of coverage, be able to switch from crowd to individual coverage, cause a temporarily incapacitating effect, have a low probability of fatality or permanent injury, cause no damage to property, and have a low probability of affecting friendly personnel". [3]
But these ears aren’t just good for hearing. They help the foxes stay cool in the hot desert. The large ears act like natural air conditioners, releasing heat and keeping the foxes comfortable ...