The issue of extremely low frequency (ELF) biological effects is very controversial. Research has focused on possible carcinogenic, reproductive, and neurological effects . Other suggested health effects include cardiovascular, brain and behavior, hormonal and immune system changes.
Read moreWhat is extremely low frequency EMF?
Extremely low frequency (ELF) electric and magnetic fields (EMF) occupy the lower part of the electromagnetic spectrum in the frequency range 0-3000 Hz . ELF EMF result from electrically charged particles.
Read moreWhat are low mid and high frequencies?
Mid frequency is comprised of the sounds we perceive most often on a day to day basis and fall into the range of 200-2,000 Hz. Anything below 200 Hz is considered low frequency and anything above 2,000 Hz is high frequency sound .
Read moreWhat is high frequency and low frequency?
The lower the frequency, the fewer the oscillations. High frequencies produce more oscillations . The units of frequency are called hertz (Hz). Humans with normal hearing can hear sounds between 20 Hz and 20,000 Hz.
Read moreWhat is above Extremely High Frequency?
Extremely high frequency (EHF) is the International Telecommunication Union (ITU) designation for the band of radio frequencies in the electromagnetic spectrum from 30 to 300 gigahertz (GHz). It lies between the super high frequency band and the far infrared band, the lower part of which is the terahertz band.
Read moreWhat frequencies does the military use?
The military services use the 138-144 MHz band to support air-to-ground, air-to-air, and air-ground-air (AGA) tactical communications; air traffic control operations; LMR nets for sustaining base and installation infrastructure support; and for tactical training and test range support.
Read moreWhat is UHF and SHF?
Radio waves with frequencies above the UHF band fall into the super-high frequency (SHF) or microwave frequency range . Lower frequency signals fall into the VHF (very high frequency) or lower bands.
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