EMF Glossary

B
Beam angle

Beam Angle Definition

Beam angle is the light spread over distance. A narrow beam angle concentrates light, while a wide beam angle spreads the light. At the same distance from the light source, the narrow beam has more energy.
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E
Girl with EHS

Electro Hypersensitivity (EHS) Definition

Electro hypersensitivity is an adverse biological reaction to EMF exposure.
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Extremely low frequency of 3 Hz

ELF (Extremely Low Frequency) Definition

Extremely Low Frequencies are those radio waves with frequencies between 3 and 30 Hz. ELF are a form of electromagnetic radiation.
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G
Magnetic poles

Gauss (G or Gs) Definition

Gauss is a measure of a magnetic field's force on another magnetic field or on a conductor such as metal.
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H
Four Hertz graph

Hertz (Hz) Definition

Hertz is the number of cycles (waves) that pass a given area in one second.
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I
Irradiance

Irradiance Definition

Irradiance is the the light therapy device's power output in milliwatts per square centimeter of surface area at a given distance, where distance is usually three, 6, or 9 inches from the body.
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N
Neuro muscular electrical stimulator on the legs

Neuromuscular Electric Stimulation (NMES) Definition

Neuromuscular Electric Stimulation (NMES) is a therapeutic devices that uses electricity to cause muscles to contract.
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P
Irradiance

Power Density

See irradiance for power density definition and calculations
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Surgical Incision PEMF Coil

Pulsed Electromagnetic Frequencies (PEMF) Definition

A PEMF device delivers magnetic fields through tissue to the target area. PEMF is not an electromagnetic therapy: it is a magnetic therapy.
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R
RF satellite communication

Radio Frequency (RF) Definition

The Radio Frequency (RF) bandof the electromagnetic spectrum contains frequencies from 3 kHz to 300 GHz. The Microwave (MW) band is a portion of the RF band.
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S
5G uses SHF waves

Super High Frequency (SHF) Definition

Super High Frequency includes radio waves from 3 GHz to 30 GHz on the EM spectrum.
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SAR should tell you how much RF your brain absorbs

SAR (Specific Absorption Rate) Definition

SAR is a measure of how much non-ionizing radiation your body would absorb under laboratory conditions. It's actually a meaningless number that tells you nothing about the safety of a phone's RF emission.
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