UNI EN ISO 11820 : 1999
Current
The latest, up-to-date edition.
ACOUSTICS - MEASUREMENTS ON SILENCERS IN SITU
31-01-1999
1 Scope
2 Normative references
3 Definitions
4 Corrections for background noise
4.1 Transmission sound pressure level difference
4.2 Insertion sound pressure level difference
5 Installation conditions
6 Measuring instruments
6.1 Acoustic instruments
6.2 Air flow, static pressure and temperature
measuring devices
7 Test object and measuring conditions
8 Measurement procedures
8.1 General
8.2 Acoustic measurements
8.3 Flow, pressure and temperature measurements
9 Evaluation
9.1 Evaluation of sound pressure measurements
9.2 Evaluation of flow measurements
10 Information to be recorded
11 Information to be reported
Annexes
A Field corrections
B Calibration of directional microphones and microphones
equipped with a turbulence windscreen
C Bibliography
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