000			01254nam a22001097a 4500
999			_c16259 _d16259
245			_aISO 11904-1:2002-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)
260			_aGeneva : _bInternational Organization for Standardization _c2002.
300			_a28 p.
505			_aISO 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.
650			_aAcoustics
942			_cST