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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
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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

PUBLISH DATE 1994
ISO 389-4:1994

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.

SDO ISO: International Organization for Standardization
Document Number ISO 389
Publication Date Oct. 1, 1994
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO TC 43/WG 1
Publish Date Document Id Type View
Oct. 1, 1994 ISO 389-4:1994 Revision