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EN ISO 389-4:1998

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

Publication date:   Feb 24, 2001

General information

90.93 Standard confirmed   Dec 1, 2005

CEN

CEN/TC 211 Acoustics

European Norm

13.140   Noise with respect to human beings

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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WITHDRAWN
EN 28798:1991

NOW

PUBLISHED
EN ISO 389-4:1998
90.93 Standard confirmed
Dec 1, 2005

Relations

Adopted from ISO 389-4:1994 IDENTICAL