very low-frequency emission


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 square of the distance from the source. Emissions are not constant around a computer monitor; they are higher from the sides and rear, and weakest from the front of the screen.
   Sweden is the only country to have defined a set of standards for monitor emissions. In 1990, Mat Oct Provadet (MPR), the Swedish National Board for Meteorology and Testing,reviseditsguidelinesforacceptable VLF emissions as less than or equal to 25 nanoTesla (nT). A nanoTesla is a unit of measurement for small magnetic fields.

Dictionary of networking . 2014.

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