ONORM EN ISO 11904-2 : 2005

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement principle
5 Instrumentation
  5.1 Manikin (head and torso simulator)
  5.2 Check of calibration
  5.3 Filters
6 Determination of free-field or diffuse-field related
  equivalent continuous A-weighted sound pressure level
  6.1 Measurement of manikin sound pressure level
  6.2 Conversion to free-field or diffuse-field related
      sound pressure level
  6.3 A-weighting and summation
7 Test report
Annex A (informative) Example of sources of measurement
                      uncertainty
Annex B (informative) Example of an uncertainty analysis
Bibliography

States basic framework measurement methods for sound immission from sound sources placed close to the ear. Applies to exposure to sound from sources close to the ear, for example during equipment tests or at the workplace to sound from earphones or hearing protectors with audiocommunication facilities.