absorbed within 0.4 mm (1/64 inch), whereas microwaves will penetrate into human tissue about 17 mm.

The ADS's effect of repelling humans occurs at slightly higher than 44 °C, though first-degree burns occur at about 51 °C, and second-degree burns occur at about 58 °C. In testing, pea-sized blisters have been observed in less than 0.1% of ADS exposures, indicating that second degree surface burns have been caused by the device. The radiation burns caused