Abstract
Ïã¸ÛÁùºÏ²Ê¿ª½± 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. Ïã¸ÛÁùºÏ²Ê¿ª½± 1999:2013 applies to noise at frequencies less than approximately 10 kHz which is steady, intermittent, fluctuating, irregular. Use of Ïã¸ÛÁùºÏ²Ê¿ª½± 1999:2013 for sound pressures exceeding 200 Pa (140 dB relative to 20 µPa) is recognized as extrapolation.
General information
-
Status: PublishedPublication date: 2013-10Stage: International Standard to be revised [90.92]
-
Edition: 3Number of pages: 23
-
Technical Committee :Ïã¸ÛÁùºÏ²Ê¿ª½±/TC 43ICS :13.140
- RSS updates
Next version under development
Ïã¸ÛÁùºÏ²Ê¿ª½±/DIS 1999
Acoustics — Estimation of noise-induced hearing loss
Ïã¸ÛÁùºÏ²Ê¿ª½±/DIS 1999
Life cycle
-
Previously
WithdrawnÏã¸ÛÁùºÏ²Ê¿ª½± 1999:1990
-
Now
-
Will be replaced by
Under developmentÏã¸ÛÁùºÏ²Ê¿ª½±/DIS 1999
Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)