BS EN ISO 5136:2009
Current
The latest, up-to-date edition.
Acoustics. Determination of sound power radiated into a duct by fans and other air-moving devices. In-duct method
Hardcopy , PDF
English
04-30-2010
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Uncertainty of the measurement method
5 Test facilities and instrumentation
6 Test arrangement
7 Test procedure
8 Calculations
9 Information to be recorded
10 Information to be reported
Annex A (normative) - Determination of the combined mean
flow velocity and modal correction C[3,4]
Annex B (normative) - Determination of the signal-to-noise
ratio of sound vs. turbulent pressure fluctuation
in the test duct
Annex C (normative) - Computational procedures for
calculating the A-weighted sound power level from
one-third-octave-band sound power levels
Annex D (informative) - Example of calculation of C[3,4] for
a given duct diameter and mean flow velocity
Annex E (informative) - Guidelines for the design and
construction of an anechoic termination
Annex F (informative) - Evaluation of performance of
anechoic terminations
Annex G (informative) - Sampling tube information
Annex H (informative) - Test method for small ducted fans
Annex I (informative) - Test method for large ducted fans
Annex J (informative) - Measurement of the swirl component
Bibliography
Annex ZA (informative) - Relationship between this European
Standard and the Essential Requirements of EU
Directive 98/37/EC
Annex ZB (informative) - Relationship between this European
Standard and the Essential Requirements of EU
Directive 2006/42/EC
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