Résumé
PrévisualiserISO 1999:2013 specifies a method for calculating the expected noise-induced permanent threshold shift in the hearing threshold levels of adult populations due to various levels and durations of noise exposure; it provides the basis for calculating hearing disability according to various formulae when the hearing threshold levels at commonly measured audiometric frequencies, or combinations of such frequencies, exceed a certain value.
The measure of exposure to noise for a population at risk is the noise exposure level normalized to a nominal 8 h working day, LEX,8h, for a given number of years of exposure. ISO 1999:2013 applies to noise at frequencies less than approximately 10 kHz which is steady, intermittent, fluctuating, irregular. Use of ISO 1999:2013 for sound pressures exceeding 200 Pa (140 dB relative to 20 µPa) is recognized as extrapolation.
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État actuel: PubliéeDate de publication: 2013-10
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Edition: 3
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- ICS :
- 13.140 Bruit et ses effets sur l'homme
Acheter cette norme
Format | Langue | |
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std 1 124 | PDF + ePub | |
std 2 124 | Papier | |
std 3 124 |
- CHF124
Cycle de vie
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Précédemment
AnnuléeISO 1999:1990
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Actuellement
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Sera remplacée par
ProjetISO/CD 1999
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