ELECTROMAGNETIC POWER DEPOSITION IN MAN EXPOSED TO HIGH-FREQUENCY FIELDS AND THE ASSOCIATED THERMAL AND PHYSIOLOGIC CONSEQUENCES
Arthur W. Guy, Curtis C. Johnson, James C. Lin, Ashley F. Emery, Kenneth F. Kramar · 1973
1972 thermal modeling study found low-frequency EMF requires massive power to heat body, but ignored non-thermal biological effects.
Plain English Summary
This 1972 study used mathematical models to calculate how high-frequency radio waves are absorbed by the human body and converted to heat. Researchers found that at 20 MHz and below, power absorption is extremely low - requiring exposure levels hundreds of times higher than microwave safety standards to cause significant body temperature increases.
Why This Matters
This foundational thermal modeling study reveals a crucial gap in our understanding of EMF safety standards. While the researchers concluded that high-frequency fields below 20 MHz would require massive power densities to cause thermal effects, their analysis was purely theoretical and focused only on heating mechanisms. The reality is that this study helped establish the flawed premise that EMF safety should be based solely on thermal effects - ignoring the growing body of evidence showing biological impacts at non-thermal levels.
What's particularly striking is that even using their thermal-only framework, the researchers acknowledged that maintaining normal body temperature under EMF exposure would come at 'physiologic cost' including increased heart rate and altered blood flow. This early recognition that the body must work harder to maintain homeostasis under EMF exposure hints at the non-thermal biological stress we now know occurs at much lower exposure levels than those modeled in this 1970s research.
Exposure Information
Specific exposure levels were not quantified in this study.
Show BibTeX
@article{electromagnetic_power_deposition_in_man_exposed_to_high_frequency_fields_and_the_g3853,
author = {Arthur W. Guy and Curtis C. Johnson and James C. Lin and Ashley F. Emery and Kenneth F. Kramar},
title = {ELECTROMAGNETIC POWER DEPOSITION IN MAN EXPOSED TO HIGH-FREQUENCY FIELDS AND THE ASSOCIATED THERMAL AND PHYSIOLOGIC CONSEQUENCES},
year = {1973},
}