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Some recent results on the deposition of electromagnetic energy in animals and models of man

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Gandhi OP, Hagmann MJ · 1977

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Your body absorbs up to 7 times more RF energy when standing on ground than in free space.

Plain English Summary

Summary written for general audiences

This 1977 study used computer models and phantom experiments to map how radiofrequency energy is absorbed throughout the human body. Researchers found that energy absorption varies dramatically with frequency and surrounding environment, with people standing on ground absorbing seven times more RF energy than in free space.

Why This Matters

This groundbreaking research revealed something the wireless industry rarely discusses: your environment dramatically affects how much electromagnetic energy your body absorbs. The finding that standing on a ground plane increases absorption by 700% at 10 MHz demonstrates why SAR testing in isolation doesn't reflect real-world exposure. The study's discovery of body resonance effects - where different frequencies concentrate energy in different body parts - helps explain why some people may be more sensitive to specific wireless technologies. What makes this research particularly significant is that it predates the wireless revolution by decades, providing unbiased baseline data before industry influence shaped the research landscape. The multibody effects showing 170% increased absorption when people are near each other reveals another gap in current safety testing, which typically evaluates devices in isolation rather than in crowded spaces like offices, schools, and public transit.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Gandhi OP, Hagmann MJ (1977). Some recent results on the deposition of electromagnetic energy in animals and models of man.
Show BibTeX
@article{some_recent_results_on_the_deposition_of_electromagnetic_energy_in_animals_and_m_g4668,
  author = {Gandhi OP and Hagmann MJ},
  title = {Some recent results on the deposition of electromagnetic energy in animals and models of man},
  year = {1977},
  
  
}

Quick Questions About This Study

Ground acts as a reflector, creating standing wave patterns that concentrate electromagnetic energy around your body. This reflection effect dramatically increases the specific absorption rate compared to free-space conditions used in standard safety testing.
Different body parts absorb energy more efficiently at specific frequencies, like tuning forks resonating at particular pitches. This frequency-dependent absorption means certain wireless technologies may concentrate energy in specific organs or tissues.
When people are positioned near each other, their bodies interact electromagnetically, increasing absorption rates by up to 170%. This means crowded environments like classrooms or offices may create higher exposure levels than isolated testing predicts.
Standard testing measures devices in free space or with simple phantoms, ignoring real-world conditions like floors, walls, and other reflective surfaces that can multiply absorption rates by factors of seven or more.
This research established fundamental principles of RF absorption before wireless industry influence shaped the field. It provided unbiased baseline data showing dramatic environmental effects that current safety standards largely ignore in their testing protocols.