extremely low frequency


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extremely low frequency

n. Abbr. ELF
A radio frequency below 300 hertz.

extremely low frequency

n
(General Physics) a radio frequency or radio-frequency band below 3 kilohertz. Abbreviation: ELF

extreme′ly low′ fre′quency


n.
any radio frequency between 30 and 300 hertz. Abbr.: ELF
[1965–70]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.extremely low frequency - below 3 kilohertz
radio frequency - an electromagnetic wave frequency between audio and infrared
electromagnetic spectrum - the entire frequency range of electromagnetic waves
References in periodicals archive ?
Electromagnetic field of extremely low frequency decreased adenylate kinase activity in retinal rod outer segment membranes.
A 2007 report by Government advisory body Stakeholder Advisory Group on Extremely Low Frequency Electric and Magnetic Fields (SAGE) found there was evidence living near electricity lines could be linked to childhood leukaemia.
Located in Cypress, California, it specializes in directed or detected wave energy from lasers, high power microwaves, electromagnetic pulses to extremely low frequency electromagnetics and sound.
Jahani-, "Effects Of Extremely Low Frequency Electromagnetic Fields On Growth And Viability Of Bacteria, " 1: 8-15(2013).
The geophysics textbook reviews recent advances in near-term earthquake prediction that detect electromagnetic activity emanating from a region, and describe radio techniques for observing direct current geoelectric signals, ultra-low frequency electromagnetic emissions, extremely low frequency waves, and very low frequency anomalies.
1] Attempts initiated and conclusions drawn after this study, to assess exposure-oriented effects of extremely low frequency electromagnetic field (ELF EMF), were categorical.
These whales can emit extremely low frequency vocalisations that travel extraordinary distances underwater.
Extremely low frequency electromagnetic fields (EMF) surround home appliances as well as high-voltage electrical transmission lines and transformers.
Method: The cross-section study was conducted in May 2009 in which randomly assigned 362 parents answered a questionnaire inquiring about the sociodemographics and a list of environmental hazards such as tobacco smoking, sunlight exposure and skin cancer, global climate change, air pollution, noise exposure, smoking during pregnancy and low birth-weight, exposure to radon and lung cancer, reducing radon, air pollution and cardiovascular diseases, base station and childhood leukaemia, extremely low frequency electric and magnetic fields and brain tumour.
The most severe attacks, involving nuclear, chemical biological or radiological attacks (NCBR), "may cause hundreds of billions of dollars of damage, but have an extremely low frequency attached.
26 ( ANI ): Washington Navy Yard gunman ron Alexis believed he was being controlled by extremely low frequency waves.
Note, that according to ICNIRP guidelines from 1998 [2] the current density was a main parameter for the estimation of extremely low frequency exposure effects, while the new ICNIRP guidelines from 2010 [3] propose the induced electric field instead of the induced current.

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