High frequency sound is sound of which the frequency lies between 8 and 20 kHz . High frequency sound with a frequency over 16 kHz can hardly be heard, but it is not completely inaudible. High frequency sound and even ultrasound in the lower frequency zone (up to 24 kHz) can be audible if the sound level is high enough.
Read moreWhat is medium frequency and high frequency?
Frequencies immediately below HF are denoted medium frequency (MF), while the next band of higher frequencies is known as the very high frequency (VHF) band . The HF band is a major part of the shortwave band of frequencies, so communication at these frequencies is often called shortwave radio.
Read moreIs ELF radiation hazardous?
It’s not clear that exposure to ELF radiation is harmful , but there are things you can do to lower your exposure if you are concerned. Your exposure is based on the strength of the ELF radiation coming from each source, how close you are to each, and how long you spend in the field.18 Nis 2017
Read moreWhat does ELF radiation mean?
Extremely low frequency (ELF) fields includes alternating current (AC) fields and other electromagnetic, non-ionizing radiation from 1 Hz to 300 Hz. ELF fields at 60 Hz are produced by power lines, electrical wiring, and electrical equipment.
Read moreWhat is the difference between EMF and ELF?
What are ELF electric and magnetic fields? 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 is the health concern associated with ELF?
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 the medium and high frequency?
Frequency Bands and Applications Frequency Band NameAcronymFrequency RangeMedium FrequencyMF300 to 3000 kHzHigh FrequencyHF3 to 30 MHzVery High FrequencyVHF30 to 300 MHzUltra High FrequencyUHF300 to 3000 MHzFrequency Bands and Applications – Blog | JEM Engineering www.jemengineering.com › blog-frequency-bands-and-applications
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