01334nam a22001217a 4500999001700000245014500017260006900162300001000231505086200241650001401103942000701117952008801124  c16260d16260  aISO 11904-2:2004-Acoustics - Determination of sound immission from sound sources placed close to the ear - Part 2: Technique using a manikin  aGeneva :bInternational Organization for Standardization,c2004.  a24 p.  aISO 11904-2:2004 specifies basic framework measurement methods for sound immission from sound sources placed close to the ear. These measurements are carried out with a manikin, equipped with ear simulators including microphones. The measured values are subsequently converted into corresponding free-field or diffuse-field levels. The results are given as free-field related or diffuse-field related equivalent continuous A-weighted sound pressure levels. The technique is denoted the manikin technique.

ISO 11904-2:2004 is applicable 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.

ISO 11904-2:2004 is applicable in the frequency range from 20 Hz to 10 kHz. For frequencies above 10 kHz, ISO 11904-1 can be used.  aAcoustics  cST  00104070aAIISHbAIISHd2020-06-23l0pST047r2020-06-23 00:00:00w2020-06-23yST