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SN EN ISO 7779 : 2010
Withdrawn
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ACOUSTICS - MEASUREMENT OF AIRBORNE NOISE EMITTED BY INFORMATION TECHNOLOGY AND TELECOMMUNICATIONS EQUIPMENT
01-09-2019
12-01-2013
1 Scope
2 Normative references
3 Terms and definitions
3.1 General definitions
3.2 Acoustical definitions
4 Requirements
5 Installation and operating conditions
5.1 Equipment installation
5.2 Input voltage and frequency
5.3 Equipment operation
6 Method for determining sound power levels of
equipment in reverberation rooms
6.1 General
6.2 Measurement uncertainty
6.3 Test environment
6.4 Instrumentation
6.5 Installation and operation of equipment:
General requirements
6.6 Microphone positions and source locations
6.7 Measurement of sound pressure level
6.8 Measurement of the sound pressure level
of the reference sound source
6.9 Calculation of space/time-averaged band
sound pressure level
6.10 Calculation of sound power levels
7 Method for determining sound power levels of
equipment under essentially free-field conditions over
a reflecting plane
7.1 General
7.2 Measurement uncertainty
7.3 Test environment
7.4 Instrumentation
7.5 Installation and operation of equipment:
General requirement
7.6 Measurement surface and microphone positions
7.7 Measurement of sound pressure levels
7.8 Calculation of surface sound pressure level
sound power level
8 Method for measuring emission sound pressure levels
at defined operator and bystander positions
8.1 General
8.2 Measurement uncertainty
8.3 Test environment
8.4 Instrumentation
8.5 Installation and operation of equipment
8.6 Microphone positions
8.7 Measurement of sound pressure levels
8.8 Calculation of the mean emission sound pressure
level at the bystander positions
9 Information to be recorded and reported
9.1 Information to be recorded
9.2 Test report
Annex A (normative) Test accessories
Annex B (normative) Measurement surfaces
Annex C (normative) Installation and operating conditions
for specific equipment categories
Annex D (informative) Identification of prominent
discrete tones
Annex E (informative) Detection of impulsive sound
pressure levels
Bibliography
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