International Standard
ISO 11904-2:2021
Acoustics — Determination of sound immission from sound sources placed close to the ear — Part 2: Technique using a manikin
Reference number
ISO 11904-2:2021
Edition 2
2021-03
© ISO 2024
International Standard
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Published (Edition 2, 2021)

ISO 11904-2:2021

Format
Language
CHF 96
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Abstract

This document 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 document 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 audio communication facilities.

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

General information

  • Status
     : Published
    Publication date
     : 2021-03
    Stage
    : International Standard published [60.60]
  • Edition
     : 2
    Number of pages
     : 16
  • Technical Committee :
    ISO/TC 43
    ICS :
    13.140 
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Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

3
Good Health and Well-being

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