extremely low-frequency emission

extremely low-frequency emission
   Abbreviated ELF. Radiation emitted by a computer monitor and other common electrical appliances. ELF emissions fall into the range of 5 to 2000 hertz and decline with the square of the distance from the source. Emissions are not constant around a monitor; they are higher from the sides and rear and weakest from the front of the screen. Low-emission models are available, and laptop computers with an LCD display do not emit any ELF fields.

Dictionary of networking . 2014.

См. также в других словарях:

  • Extremely low frequency — (ELF) is the band of radio frequencies from 3 to 30 Hz. ELF was used by the US Navy and Soviet/Russian Navy to communicate with submerged submarines.ExplanationBecause of the electrical conductivity of salt water, submarines are shielded from… …   Wikipedia

  • Extremely Low Frequency — emission of low frequency electromagnetic radiation from electrical appliances …   English contemporary dictionary

  • very low-frequency emission —    Abbreviated VLF. Radiation emitted by a computer monitor and other common household electrical appliances, such as televisions, hair dryers, electric blankets, and food processors.    VLF emissions range from 2 to 400kHz and decline with the… …   Dictionary of networking

  • Extremely high frequency — Frequency range 30 to 300 GHz ITU Radio Band Numbers 1 2 3 4 5 6 7 8 9 10 …   Wikipedia

  • radio frequency interference —    Abbreviated RFI. Many electronic devices, including radios, televisions, computers, and peripherals, can interfere with other signals in the radio frequency range by producing electromagnetic radiation. The use of radio frequencies is… …   Dictionary of networking

  • High Frequency Active Auroral Research Program — HAARP is often confused with Project HARP, the High Altitude Research Project (a joint project of The Pentagon and the Canadian Department of National Defence).The High Frequency Active Auroral Research Program (HAARP) is an investigation project …   Wikipedia

  • Amateur radio frequency allocations — Amateur radio frequency allocation is done by national telecommunications authorities. Globally, the ITU oversees how much radio spectrum is set aside for amateur radio transmissions. Radio amateurs use a variety of transmission modes, including… …   Wikipedia

  • Field emission — (FE) is the emission of electrons from the surface of a condensed phase into another phase due to the presence of high electric fields. In this phenomenon, electrons with energies below the Fermi level tunnel through the potential barrier at the… …   Wikipedia

  • FCC certification —    Approval by the FCC (Federal Communications Commission) that a specific computer model meets its standards for radio frequency interference (RFI) emissions. There are two levels of certification:    • Class A certification, which is for… …   Dictionary of networking

  • ELF —    See extremely low frequency emission …   Dictionary of networking

Поделиться ссылкой на выделенное

Прямая ссылка:
Нажмите правой клавишей мыши и выберите «Копировать ссылку»