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ULTRASONIC EFFECTS COMPARED WITH BIOLOGICAL MICROWAVE EFFECTS

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Victor T. Tomberg · 1960

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1960 research proved microwaves cause non-thermal biological effects similar to ultrasound damage, contradicting industry claims.

Plain English Summary

Summary written for general audiences

This 1960 research compared the biological effects of microwave radiation and ultrasonic waves, identifying three types of microwave effects: ordinary thermal, specific thermal, and non-thermal electric effects. The study found striking similarities between how microwaves and ultrasound affect biological systems, suggesting both can cause thermal and non-thermal damage at different power levels.

Why This Matters

This early research is remarkable for recognizing what the telecommunications industry still denies today: that microwave radiation causes non-thermal biological effects. In 1960, researchers already understood that microwaves could damage living systems through mechanisms beyond simple heating. The comparison to ultrasound is particularly insightful because ultrasound's ability to cause mechanical vibration, cavitation, and chemical changes in tissues is well-established. What this means for you is that your wireless devices operate in the same microwave frequencies this study examined, often at power levels the researchers identified as biologically active. The science demonstrates that non-thermal effects occur at energy levels well below what current safety standards consider harmful, yet these are the same levels your smartphone, WiFi router, and other devices emit daily.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Victor T. Tomberg (1960). ULTRASONIC EFFECTS COMPARED WITH BIOLOGICAL MICROWAVE EFFECTS.
Show BibTeX
@article{ultrasonic_effects_compared_with_biological_microwave_effects_g5005,
  author = {Victor T. Tomberg},
  title = {ULTRASONIC EFFECTS COMPARED WITH BIOLOGICAL MICROWAVE EFFECTS},
  year = {1960},
  
  
}

Quick Questions About This Study

Researchers identified ordinary thermal effects, specific thermal effects, and electric non-thermal effects. The non-thermal effects occurred even at low power levels below 1W/cm², challenging the assumption that only heating causes biological damage from microwave radiation.
The study found high similarity between microwave and ultrasonic effects on biological systems. Both cause thermal damage, mechanical vibration effects, cavitation phenomena, and chemical changes like free radical formation, suggesting similar biological mechanisms of harm.
Non-thermal electric effects were documented at energy levels below 1W/cm². This is significant because many consumer devices operate at much lower levels yet still fall within ranges this research identified as biologically active.
Ultrasonic effects were already well-understood to cause mechanical vibration, cavitation, and chemical changes in tissues. By comparing microwaves to ultrasound, researchers could better understand the non-heating mechanisms by which microwave radiation affects biological systems.
Researchers used pressure sensitive probes and sensitized thermocouples to identify two distinct energy ranges responsible for thermal and non-thermal effects. These specialized instruments allowed them to separate heating effects from other biological mechanisms of microwave damage.