|Distance between exposed object and exposure source||2.25 m|
|Chamber||The electrically shielded anechoic chamber was 6.7 x 6.7 x 9.8 m³ and contained a horizontal Fiberglas™ grid deck allowing placement of an antenna (tuneable dipole in a vertical 90° corner reflector) and a chair.|
|Setup||Subjects wearing a bathing suit sat on a light plastic chair, elevated 53.8 cm above the grid floor, facing the rear chamber wall.|
|Sham exposure||A sham exposure was conducted.|
|Additional info||After 30 min of equilibration to the prevailing temperature (24, 28, or 31 °C), the subjects were exposed or sham exposed for 45 min.|
Local skin temperatures, even those on the back that were irradiated directly, changed little or not during 100 MHz exposures. The sole exception was the temperature of the ankle skin, which increased by 3-4°C in some subjects (power density = 8 mW/cm²). Thermoregulation was controlled by appropriate increases in sweating and by skin blood flow. Because of the deep penetration of resonant radiofrequency energy at this frequency (100 MHz), these changes must have been stimulated by thermal receptors deep the body rather than those located in the skin.