DETERMINATION OF HIGH-FREQUENCY SOUND POWER LEVELS EMITTED BY INFORMATION TECHNOLOGY AND TELECOMMUNICATIONS EQUIPMENT

Published date

12-01-2013

Publisher

European Computer Manufacturers Association

1 Scope
2 Conformance
3 Normative references
4 Terms and definitions
5 Requirements for measurements in
   a reverberation test room
6 Method using measured reverberation time
7 Method using calculated air absorption
8 Method using a reference sound source
9 Method using a free field over a reflecting plane
10 Calculation of sound power level under
   reference meteorological conditions
11 Measurement uncertainty
12 Information to be recorded
13 Information to be reported
Annex A (normative) - Calculation of air
        absorption coefficient
Bibliography

Describes four methods for the determination of the sound power levels of high frequency 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.

Committee	TC 26
DocumentType	Standard
PublisherName	European Computer Manufacturers Association
Status	Current

17/30359986 DC : 0	BS EN ISO 7779 - ACOUSTICS - MEASUREMENT OF AIRBORNE NOISE EMITTED BY INFORMATION TECHNOLOGY AND TELECOMMUNICATIONS EQUIPMENT
EN ISO 7779:2010	Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment (ISO 7779:2010)
UNI EN ISO 7779 : 2010	ACOUSTICS - MEASUREMENT OF AIRBORNE NOISE EMITTED BY INFORMATION TECHNOLOGY AND TELECOMMUNICATIONS EQUIPMENT
DIN EN ISO 7779:2011-01	ACOUSTICS - MEASUREMENT OF AIRBORNE NOISE EMITTED BY INFORMATION TECHNOLOGY AND TELECOMMUNICATIONS EQUIPMENT
ECMA 74 : 14ED 2017	MEASUREMENT OF AIRBORNE NOISE EMITTED BY INFORMATION TECHNOLOGY AND TELECOMMUNICATIONS EQUIPMENT
UNE-EN ISO 7779:2011	Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment (ISO 7779:2010)
BS EN ISO 7779:2010	Acoustics. Measurement of airborne noise emitted by information technology and telecommunications equipment
ANSI/ASA S12.10 PART 1:2010(R2020)	ACOUSTICS - MEASUREMENT OF AIRBORNE NOISE EMITTED BY INFORMATION TECHNOLOGY AND TELECOMMUNICATIONS EQUIPMENT - PART 1: DETERMINATION OF SOUND POWER LEVEL AND EMISSION SOUND PRESSURE LEVEL
I.S. EN ISO 7779:2010	ACOUSTICS - MEASUREMENT OF AIRBORNE NOISE EMITTED BY INFORMATION TECHNOLOGY AND TELECOMMUNICATIONS EQUIPMENT
ECMA/TR 62 : 1ED 93	PRODUCT NOISE EMISSION OF COMPUTER BUSINESS EQUIPMENT
ISO 7779:2010	Acoustics Measurement of airborne noise emitted by information technology and telecommunications equipment
ECMA/TR 27 : 2ED 95	METHOD FOR THE PREDICTION OF INSTALLATION NOISE LEVELS
ANSI/ASA S12.10 PART 1 : 2010	ACOUSTICS - MEASUREMENT OF AIRBORNE NOISE EMITTED BY INFORMATION TECHNOLOGY AND TELECOMMUNICATIONS EQUIPMENT - PART 1: DETERMINATION OF SOUND POWER LEVEL AND EMISSION SOUND PRESSURE LEVEL

ISO 3744:2010	Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering methods for an essentially free field over a reflecting plane
ISO 9613-1:1993	Acoustics Attenuation of sound during propagation outdoors Part 1: Calculation of the absorption of sound by the atmosphere
ISO 6926:2016	Acoustics Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels
ISO 3741:2010	Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Precision methods for reverberation test rooms
ISO 3745:2012	Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Precision methods for anechoic rooms and hemi-anechoic rooms
ISO 7779:2010	Acoustics Measurement of airborne noise emitted by information technology and telecommunications equipment
ISO/IEC Guide 98-3:2008	Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)