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ISO 389-4:1994

Acoustics — Reference zero for the calibration of audiometric equipment — Part 4: Reference levels for narrow-band masking noise

Sep 22, 1994

General information

90.20     Jan 15, 2026

ISO

ISO/TC 43

International Standard

13.140  

French   English  

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Scope

Specifies reference levels for narrow-band masking noise presented by air conduction from an earphone in pure-tone audiometry. The data are given in terms of levels to be added to the reference equivalent threshold sound pressure levels for the corresponding pure-tone frequencies. Data are given for noise bandwidths of one-third and one-half octaves.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 8798:1987

NOW

PUBLISHED
ISO 389-4:1994
90.20 Standard under periodical review
Jan 15, 2026

National adoptions

SRPS EN ISO 389-4:2012  
ISS

Acoustics - Reference zero for the calibration of audiometric equipment - Part 4: Reference levels for narrow-band masking noise (ISO 389-4:1994)

90.93   Standard confirmed

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