Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols (and abbreviated terms)
5 Test facilities and instrumentation
  5.1 Purpose and types of test facilities
  5.2 Acoustic testing of silencers
  5.3 Acoustic testing of air-terminal units
  5.4 Flow testing
  5.5 Dynamic testing
6 Test procedures
  6.1 General
  6.2 Insertion loss
  6.3 Transmission loss
  6.4 Sound power level of the flow noise (or regenerated sound)
  6.5 Volume flow rate and pressure loss coefficient
7 Information to be recorded
  7.1 Description of the test object
  7.2 Instrumentation
  7.3 Sound source equipment
  7.4 Test, substitution and transmission ducts
  7.5 Transitions
  7.6 Anechoic termination
  7.7 Reverberation room
  7.8 Acoustical test results
  7.9 Measurement uncertainty
8 Information to be reported
Annex A (normative) Design of the sound field excitation
        equipment and qualification tests
      A.1 General
      A.2 Modal filter for measurement without flow
      A.3 Sound field excitation equipment for measurement
          with flow
      A.4 Qualification tests
Annex B (normative) Transmission element
      B.1 Design of a transmission element
      B.2 Measurement of the reflection coefficient of a
          transmission element
      B.3 Calculation of the transmission loss and reflection
          coefficient at the open end of a duct
Annex C (normative) Duct walls and limiting insertion loss
      C.1 Flanking transmission
      C.2 Arrangements for determining the limiting insertion
          loss
Annex D (normative) Conversion of one-third-octave-band
        attenuation values to octave-band attenuation values
Annex E (normative) Measurement on large parallel-baffle
        silencers
Annex F (normative) Test of longitudinal attenuation
Annex G (informative) Anechoic terminations
      G.1 Guidelines for the design and construction of an
          anechoic termination
      G.2 Evaluation of performance
Annex H (informative) Examples of measurement arrangements
Bibliography