BS EN ISO 11904-2:2004 PDF

Acoustics. Determination of sound immission from sound sources placed close to the ear - Technique using a manikin

First page of standard BS EN ISO 11904-2:2004

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Title (English):

BS EN ISO 11904-2:2004

Acoustics. Determination of sound immission from sound sources placed close to the ear - Technique using a manikin

Document status:: Withdrawn
Format:: Electronic (PDF)
Publication date:: November 18, 2004
ICS:: 17.140.01
Technical committee:: CEN
SKU:: BS EN ISO 11904-2:2004

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Abstract

1 Scope This part of ISO 11904 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. This part of ISO 11904 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. This part of ISO 11904 is applicable in the frequency range from 20 Hz to 10 kHz. For frequencies above 10 kHz, ISO 11904‑1 can be used.

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BS EN ISO 11904-2:2004 PDF

Abstract

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Abstract

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