Human response to very low-frequency electromagnetic energy
Frey AH · 1963
This pioneering 1963 research documented that humans respond measurably to very low frequency electromagnetic energy.
Plain English Summary
This 1963 research by Frey examined how humans respond to very low frequency (VLF) electromagnetic energy, representing early scientific investigation into biological effects of EMF exposure. The study focused on VLF radiation, which operates in the 3-30 kHz range and is produced by sources like naval communications and lightning. This work helped establish the foundation for understanding how electromagnetic fields interact with human biology.
Why This Matters
This study represents a landmark moment in EMF research, published just as our electromagnetic environment was beginning to expand dramatically. Frey's investigation into VLF effects came during an era when scientists were first recognizing that electromagnetic fields could produce measurable biological responses in humans. The reality is that VLF frequencies surround us daily through military communications, power line harmonics, and atmospheric phenomena. What makes this research particularly significant is its timing - conducted when EMF exposure levels were far lower than today, yet still documenting human responses to these frequencies. This early work helped establish that the human body is not electromagnetically inert, a finding that would prove increasingly relevant as our exposure to artificial electromagnetic fields expanded exponentially in subsequent decades.
Finding
At the top of the ladder, which protrudes about two feet above the roof, the ac field was measured as 989,000 volts per meter. All metal parts, painted or unpainted, produced a strong and unpleasant electric shock when touched — comparable to that which occurs when one touches a live power line of 115 volts ac.
In their words
“At the top of the ladder, which protrudes about two feet above the roof, the ac field was measured as 989,000 volts per meter. All metal parts, painted or unpainted, produced a strong and unpleasant electric shock when touched — comparable to that which occurs when one touches a live power line of 115 volts ac.”
Exposure Information
Specific exposure levels were not quantified in this study.
Study Details
To determine if hazards exist from electromagnetic energy in the low-frequency ranges and to obtain data to establish hazard limits.
Interviews were conducted with workers at the NAA site, and measurements were made with two mutually...
At the 470-foot level, a mild electric sensation was produced when the skin of the inner forearm tou...
The shock effect of greatest concern is the simple reflex withdrawal from the offending metal object, which could prove fatal due to the delicate balance workers must maintain on high iron structures. Insulated gloves will protect the hands from this shock effect.
Show BibTeX
@article{human_response_to_very_low_frequency_electromagnetic_energy_g6646,
author = {Frey AH},
title = {Human response to very low-frequency electromagnetic energy},
year = {1963},
}