NF EN ISO 11904-2

NF EN ISO 11904-2

March 2021
Standard Current

Acoustics - Determination of sound immission from sound sources placed close to the ear - Part 2 : technique using a manikin

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.

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Main informations

Collections

National standards and national normative documents

Publication date

March 2021

Number of pages

26 p.

Reference

NF EN ISO 11904-2

ICS Codes

17.140.01   Acoustic measurements and noise abatement in general

Classification index

S31-066-2

Print number

1

International kinship

ISO 11904-2:2021

European kinship

EN ISO 11904-2:2021
Sumary
Acoustics - Determination of sound immission from sound sources placed close to the ear - Part 2 : technique using a manikin

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.

Replaced standards (1)
NF EN ISO 11904-2
June 2005
Standard Cancelled
Acoustics - Determination of sound immissions from sound sources placed close to the ear - Part 2 : technique using a manikin (manikin-technique)

Le présent document spécifie des méthodes de mesure générales d'exposition sonore due à des sources placées à proximité de l'oreille. Les mesures sont réalisées en utilisant un mannequin.

Table of contents
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  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Principe de mesure
  • 5 Appareillage
  • 6 Détermination du niveau de pression acoustique continu équivalent pondéré A relatif au champ libre ou au champ diffus
  • 7 Rapport d'essai
  • Annexe A (informative) Exemples de sources d'incertitude de mesure
  • Annexe B (informative) Exemple d'analyse de l'incertitude
  • Bibliographie
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