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БДС EN ISO 11904-1:2003

Acoustics - Determination of sound immission from sound sources placed close to the ear - Part 1: Technique using a microphone in a real ear (MIRE technique) (ISO 11904-1:2002)

Oct 23, 2003

General information

90.93     Jul 1, 2008

90.00    Jul 1, 2013



European Standard

17.140.01     13.140  




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ISO 11904-1:2002 specifies basic framework measurement methods for sound immissions from sound sources placed close to the ear. These measurements are carried out with miniature or probe microphones inserted in the ear canals of human subjects. The measured values are subsequently converted into corresponding free-field or diffuse-field levels. The results can be given as free-field related or diffuse-field related equivalent continuous A-weighted sound pressure levels. The technique is denoted the microphone-in-real-ear technique (MIRE technique).
ISO 11904-1:2002 is applicable to exposure from sources close to the ear, for example during equipment tests or at the workplace by earphones or hearing protectors with audio communication facilities.
ISO 11904-1:2002 is applicable in the frequency range from 20 Hz to 16 000 Hz.

Life cycle


БДС EN ISO 11904-1:2003
90.93 Standard confirmed
Jul 1, 2008

Related project

Adopted from EN ISO 11904-1:2002

Adopted from ISO 11904-1:2002