NS 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
    6.1 General
    6.2 Cabin location
    6.3 Cabin mounting and conditions
    6.4 Measurement of the sound pressure level in the
          room
    6.5 Measurement of the sound pressure level inside
          the cabin
    6.6 Sound pressure insulation, Dp
    6.7 Measurement of noise inside the cabin due to
          noise sources forming an integral part of the
          cabin (internal noise level, LpA)
7 Measurement of sound insulation performance in situ
    7.1 General
    7.2 External sound field
    7.3 Cabin mounting and conditions
    7.4 Microphone positions in the room
    7.5 Microphone positions inside the cabin
    7.6 Apparent sound pressure insulation, D'p
    7.7 Measurement of noise inside the cabin due to
          noise sources forming an integral part of the
          cabin (internal noise level, LpA)
8 Weighted sound pressure insulation
9 Estimated cabin noise insulation for a specific
    noise spectrum
10 Uncertainty
11 Information to be recorded
    11.1 Test object
    11.2 Test conditions
    11.3 Instrumentation
    11.4 Acoustical data
    11.5 Further information
12 Information to be reported
Annexes
A Estimated cabin noise insulation for a specific noise
    spectrum
B Bibliography

Defines a laboratory method and in situ method for determination of the sound insulation performance of sound-protecting cabins. Applies to a complete cabin and not to individual components.