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Research Needs for Establishing a Radio Frequency Electromagnetic Radiation Safety Standard

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Curtis C. Johnson · 1973

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A 1973 review revealed 1,000-fold differences in EMF safety standards between countries, highlighting unresolved conflicts about non-thermal biological effects.

Plain English Summary

Summary written for general audiences

This 1973 review examined the research needs for establishing safety standards for radio frequency electromagnetic radiation. The study highlighted a dramatic 1,000-fold difference between US safety standards (10 mW/cm²) and Soviet standards (10 μW/cm²), with the US focusing on heating effects while the USSR emphasized nervous system impacts. The authors called for comprehensive research to resolve these conflicting approaches to EMF safety.

Why This Matters

This foundational 1973 document reveals how the EMF safety debate began with fundamentally different philosophies that persist today. The science demonstrates that while US regulators focused narrowly on thermal effects, Soviet researchers were already documenting nervous system impacts at exposures 1,000 times lower. What this means for you is that our current safety standards were built on an incomplete understanding of biological effects. The reality is that this early recognition of non-thermal effects was largely ignored by Western regulators, creating the regulatory gap we still live with today. Put simply, the evidence for biological effects below heating thresholds has existed for over 50 years, yet our safety standards remain based primarily on preventing tissue heating.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Curtis C. Johnson (1973). Research Needs for Establishing a Radio Frequency Electromagnetic Radiation Safety Standard.
Show BibTeX
@article{research_needs_for_establishing_a_radio_frequency_electromagnetic_radiation_safe_g4015,
  author = {Curtis C. Johnson},
  title = {Research Needs for Establishing a Radio Frequency Electromagnetic Radiation Safety Standard},
  year = {1973},
  
  
}

Quick Questions About This Study

The 1973 American National Standards Institute (ANSI) established a safety level of 10 mW/cm² for radio frequency radiation from 10 MHz to 100 GHz, based primarily on preventing tissue heating effects during exposures longer than 0.1 hour.
Soviet and East European countries set their EMF safety standard at 10 μW/cm² (1,000 times lower than the US) based on research showing central nervous system and behavioral effects occurring well below levels that cause tissue heating.
According to this 1973 review, radio frequency electromagnetic radiation in the environment was negligible before World War II. The post-war expansion of radar, television, and communication systems marked the first time in evolutionary history humans faced appreciable EMF exposure.
The study identified conflicting research data and conclusions between countries studying EMF effects. It called for comprehensive research to establish scientifically sound standards, noting fundamental differences in research emphasis and safety philosophies between nations.
The review noted rapidly expanding use of radar systems, television broadcasting, industrial and medical heating units, communication systems, and many other related radio frequency devices that were increasing human EMF exposure for the first time in history.