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BS EN ISO 389-4:1999

BS EN ISO 389-4:1999

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Acoustics. Reference zero for the calibration of audiometric equipment Reference levels for narrow-band masking noise

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

15-07-1999

Publisher

British Standards Institution

Defines reference levels for narrow-band masking noise presented by air conduction from an earphone in pure-tone audiometry. Data given is in terms of levels to be added to the reference equivalent threshold sound pressure levels for the corresponding pure-tone frequencies as given in ISO 389:1991 or ISO 389-2, respectively, when the masking earphone is placed on the appropriate acoustic coupler, ear simulator or artificial ear.

This part of ISO389 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 as specified in ISO389:1991 or ISO389-2, respectively, when the masking earphone is placed on the appropriate acoustic coupler, ear simulator or artificial ear.

Data are given for noise bandwidths of one-third and one-half octaves.

NOTE1 Some notes on the derivation of the reference levels are given in annexA.

Committee
EH/1/1
DevelopmentNote
Renumbers and supersedes BS ISO 389-4. 1999 Version incorporates amendment 10484 BS ISO 389-4. Supersedes BS 7113(1989) and 86/53942 DC. (10/2005)
DocumentType
Standard
Pages
16
PublisherName
British Standards Institution
Status
Current
Supersedes

PD 6545:2005 Intended use of human head and ear simulators-guide

IEC 60645-1:2017 Electroacoustics - Audiometric equipment - Part 1: Equipment for pure-tone and speech audiometry
ISO 389:1991 Acoustics Standard reference zero for the calibration of pure-tone air conduction audiometers
IEC 60126:1973 IEC reference coupler for the measurement of hearing aids using earphones coupled to the ear by means of ear inserts
IEC 60711:1981 Occluded-ear simulator for the measurement of earphones coupled to the ear by ear inserts
EN ISO 389-2 : 1996 Acoustics - Reference zero for the calibration of audiometric equipment - Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones (ISO 389-2:1994)
IEC 60318:1970 An IEC artificial ear, of the wide band type, for the calibration of earphones used in audiometry
ISO 389-2:1994 Acoustics Reference zero for the calibration of audiometric equipment Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones
ISO 389-3:2016 Acoustics Reference zero for the calibration of audiometric equipment Part 3: Reference equivalent threshold vibratory force levels for pure tones and bone vibrators
EN ISO 389 : 1995 ACOUSTICS - STANDARD REFERENCE ZERO FOR THE CALIBRATION OF PURE-TONE AIR CONDUCTION

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