Cutaneous Perception of Microwaves
Sol M. Michaelson · 1972
Human skin can detect microwave radiation as heat within seconds, but only at levels much higher than typical wireless device exposures.
Plain English Summary
This 1972 study examined how humans perceive microwave radiation through skin sensation, finding that people can feel warmth within 1 second when exposed to microwaves at specific power levels. Researchers determined that a 40 cm² area of facial skin could detect thermal sensation at 21 mW/cm² for 10,000 MHz microwaves and 58.6 mW/cm² for 3,000 MHz microwaves. The study established that our skin's ability to sense heat serves as a natural warning system for microwave exposure.
Why This Matters
This early research reveals something remarkable: your skin can actually detect microwave radiation through heat sensation, essentially serving as a biological EMF detector. The science demonstrates that humans can perceive microwave exposure within seconds at power densities that, while higher than typical daily exposures, aren't astronomical. What this means for you is that your body has some natural awareness of intense microwave fields, but this thermal warning system only kicks in at relatively high exposure levels.
The reality is that modern wireless devices often operate well below these thermal sensation thresholds, meaning you can be exposed to significant EMF without any physical awareness. Put simply, the absence of heat sensation doesn't mean the absence of biological effects. This 1972 study helped establish the foundation for thermal-based safety standards, but decades of subsequent research have shown biological effects occur at much lower, non-thermal levels.
Finding
These data and other information on microwave Sensation suggest that cutaneous perception of microwaves may provide a protection factor with sufficient margin of safety constituting a warning mechanism to prevent exposure to microwaves at levels that could be injurious.
In their words
“These data and other information on microwave Sensation suggest that cutaneous perception of microwaves may provide a protection factor with sufficient margin of safety constituting a warning mechanism to prevent exposure to microwaves at levels that could be injurious.”
Exposure Information
Specific exposure levels were not quantified in this study.
Show BibTeX
@article{cutaneous_perception_of_microwaves_g6663,
author = {Sol M. Michaelson},
title = {Cutaneous Perception of Microwaves},
year = {1972},
}