ISO 1999:1990

Acoustics -- Determination of occupational noise exposure and estimation of noise-induced hearing impairment

Prescribes a practical relation for these quanitities expressed as A-weighted noise level in dB and duration of exposure within a normal working week (40 hours) and the percentage of personnel that is to be expected to obtain a raised hearing threshold of 25 dB or more as a result of this exposure, averaged from 500, 1000 and 2000 Hz.


General information

  • Status :  Withdrawn
    Publication date : 1990-01
  • Edition : 2
  • :
    ISO/TC 43/SC 1
    Noise
  • 13.140
    Noise with respect to human beings

Life cycle

A standard is reviewed every 5 years



Revisions / Corrigenda

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