Know your exposure and reduce your risk
Home Apartment Office Property Vehicle
As we take measurements, we will put the various exposure levels into context for you and explain how they relate to naturally occurring background levels, official exposure limits, and precautionary recommendations by concerned scientists and medical experts.
Power-frequency electric fields (ELF)
Sources: power/extension cords, wiring in walls, electrical appliances
Measurements: electric field strength in V/m at 60 Hz / 5 Hz to 2 kHz
Unplug all devices around the bed, including bedside lamps; otherwise, keep your distance from wiring and power cords, at minimum 3 to 6 feet.
Power-frequency magnetic fields (ELF)
Sources: overhead power lines, electrical panel, ground current
Measurements: magnetic flux density in nT or mG at 60 Hz / 5 Hz to 2 kHz
Always upgrade knob-and-tube wiring and avoid using heating blankets.
Radio-frequency radiation (RF)
Sources: wireless devices, cordless phones, Wi-Fi, cell antennas, radio, TV, radar
Measurements: power density in µW/m2 from 27 to 10,000 MHz
Prefer hardwired connections and use wireless devices more safely.
Intermediate frequency fields / dirty power (VLF)
Sources: fluorescent lamps, switch-mode power supplies, power inverters
Measurements: radiated and conducted emissions in V/m, nT, mV, > 2kHz
Avoid using (compact) fluorescent lighting.
Static electric fields
Sources: synthetic carpeting, synthetic bed sheets, synthetic clothing
Measurements: surface potential in V
Wear clothing made of naturally antistatic materials; walk barefoot where appropriate.
Static magnetic fields
Sources: box spring mattresses, headphones, steel reinforcement/trusses
Measurements: magnetic flux density in µT as a deviation from Earth’s magnetic field
Choose a nontoxic, metal-free mattress for undisturbed sleep.
Sources: natural background radiation of Earth’s crust, vintage watches
Measurements: gamma radiation in nSv/h, radon in Bq/m3
Ventilate regularly, which can reduce radon levels by up to 50%.
Sources: natural daylight and artificial lighting (incandescent, fluorescent, LED)
Measurements: illumination in lux
To boost melatonin levels, maximize light intake during the day and keep it dark at night.
Sources: human exhaled air, burning of fuels like wood, gas, or oil
Measurements: carbon dioxide in ppm
Provide adequate air exchange to prevent carbon dioxide buildup indoors.