BS EN ISO 11957:2009

1 Scope
2 Normative references
3 Definitions
4 Test environment and choice of suitable quality
5 Instrumentation
6 Measurement of sound insulation performance in the
   laboratory
7 Measurement of sound insulation performance in situ
8 Weighted sound pressure insulation
9 Estimated cabin noise insulation for a specific noise
   spectrum
10 Uncertainty
11 Information to be recorded
12 Information to be reported
Annex A (informative) - Estimated cabin noise insulation for a
        specific noise spectrum
Annex B (informative) - 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

Defines a laboratory method and in situ methods for the determination of the sound insulation performance of sound-protecting cabins.

This International Standard specifies a laboratory method (clause 6) and in situ methods (clause 7) for the determination of the sound insulation performance of sound-protecting cabins. The sound insulation performance is the reduction in sound pressure level or sound power level afforded by the cabin. The methods are applicable to cabins with a small leak ratio (θ≤2%).

This International Standard is applicable to a complete cabin only and not to the individual components from which it is made.

NOTE 1 Sound insulations for cabin components such as wall elements, doors, windows, silencers, etc. should be measured according to other relevant standards.

Requirements for the test environment in the laboratory are based on those given in ISO 37 41.