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ELF Coupling to Spherical Models of Man and Animals

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Ronald J. Spiegel · 1976

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1976 research proved ELF fields from power lines and military systems penetrate biological tissue and induce electrical currents.

Plain English Summary

Summary written for general audiences

This 1976 study calculated how extremely low frequency (ELF) electromagnetic fields from Navy communications systems and high-voltage power lines induce electrical currents in spherical models representing humans and animals. The researchers developed mathematical models to predict field penetration and energy absorption, though they acknowledged the models could only estimate effects within an order of magnitude.

Why This Matters

This foundational 1976 research represents one of the earliest attempts to quantify how ELF fields interact with biological systems. What makes this study particularly relevant today is its focus on two major EMF sources we still encounter: military communication systems and power transmission lines. The science demonstrates that ELF fields do penetrate biological tissue and induce measurable currents, establishing the basic physics that underlies modern EMF health concerns. While the spherical models were crude by today's standards, this work laid crucial groundwork for understanding EMF bioeffects. The reality is that the power line and military communication exposures modeled in this study remain significant sources of population-wide ELF exposure nearly five decades later.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Ronald J. Spiegel (1976). ELF Coupling to Spherical Models of Man and Animals.
Show BibTeX
@article{elf_coupling_to_spherical_models_of_man_and_animals_g5179,
  author = {Ronald J. Spiegel},
  title = {ELF Coupling to Spherical Models of Man and Animals},
  year = {1976},
  
  
}

Quick Questions About This Study

Researchers used simplified spherical mathematical models to represent humans and animals exposed to extremely low frequency electromagnetic fields. These models could estimate biological effects within an order of magnitude but weren't precise representations of actual body geometry.
The study specifically examined ELF fields from the Navy's proposed Sanguine antenna communication system and extra high voltage (EHV) and ultra high voltage (UHV) power transmission lines being developed by utility companies.
ELF electromagnetic fields penetrate biological tissue and induce electrical currents through both electric and magnetic field components. The study calculated these induced fields using quasistatic solutions for spheres exposed to uniform electromagnetic fields.
The researchers calculated power absorbed by their spherical biological models when exposed to ELF fields, though specific absorption values weren't detailed in the abstract. This represented early work quantifying energy deposition in biological systems.
Yes, the researchers specifically considered the question of biological hazards from exposure to fields generated by Navy communication systems and high-voltage transmission lines, marking early recognition of potential health implications from ELF exposure.