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ECMA 108

Determination of High - frequency Sound Power Levels Emitted by Information Technology and Telecommunications Equipment

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Organization: ECMA
Publication Date: 1 December 2016
Status: active
Page Count: 26
scope:

This Standard ECMA-108 specifies four methods for the determination of the sound power levels of highfrequency noise emitted by information technology and telecommunications equipment in the frequency range covered by the octave band centred at 16 kHz, which includes frequencies between 11,2 kHz and 22,4 kHz. They are complementary to the methods described in Standard ECMA-74, ISO 3741 and ISO 3744. The first three methods are based on the reverberation test room technique. The fourth method makes use of a free field over a reflecting plane.

The test conditions which prescribe the installation and operation of the equipment are those specified in ECMA-74.

Document History

ECMA 108
December 1, 2016
Determination of High - frequency Sound Power Levels Emitted by Information Technology and Telecommunications Equipment
This Standard ECMA-108 specifies four methods for the determination of the sound power levels of highfrequency noise emitted by information technology and telecommunications equipment in the...
108
December 1, 2010
Measurement of High-frequency Noise emitted by Information Technology and Telecommunications Equipment
This Standard ECMA-108 specifies four methods for the determination of the sound power levels of highfrequency noise emitted by information technology and telecommunications equipment in the...
108
December 1, 2008
Measurement of Highfrequency Noise emitted by Information Technology and Telecommunications Equipment
A description is not available for this item.
108
December 1, 1996
Measurement of High-frequency Noise emitted by Information Technology and Telecommunications Equipment
A description is not available for this item.
108
January 1, 1989
Measurement of High-Frequency Noise Emitted by Computer and Business Equipment
A description is not available for this item.

References

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