DIN 45635-12:1978-03
Current
The latest, up-to-date edition.
MEASUREMENT OF NOISE EMITTED BY MACHINES; AIRBORNE NOISE MEASUREMENT, ENVELOPING SURFACE METHOD; ELECTRICAL SWITCHGEAR AND CONTROL GEAR
Hardcopy , PDF
English, German
01-01-1978
1 Purpose and field of application
2 Other relevant Standards
3 Concepts, quantities
4 Instrumentation
4.1 Sound level meter
4.2 Filters
4.3 Verification of test installation
5 Test conditions
5.1 Objects to be tested
5.2 Operating condition of the switchgear and
control gear
5.3 Installation of the switchgear and control gear
5.4 Measurement surface, measuring distance,
location and number of measuring points
5.5 Test environment
6 Test procedure
6.1 Measurement of the A-weighted impulse sound
pressure level LaI
6.2 Measurement of the impulse sound pressure
spectrum
6.3 Measurement of the background noise level
6.4 Determination of the area of measurement surface
S and of the measurement surface ratio Ls
7 Evaluation
8 Measurement uncertainty
9 Test report
10 Acoustical characteristic
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