BS EN ISO 389-4:1999
Current
The latest, up-to-date edition.
Acoustics. Reference zero for the calibration of audiometric equipment Reference levels for narrow-band masking noise
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English
15-07-1999
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.
| 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 |
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.
| Standards | Relationship |
| NBN EN ISO 389-4 : 1999 | Identical |
| NS EN ISO 389-4 : 1ED 1999 | Identical |
| NF EN ISO 389-4 : 1999 | Identical |
| NEN EN ISO 389-4 : 1999 | Identical |
| ISO 389-4:1994 | Identical |
| EN ISO 389-4:1998 | Identical |
| I.S. EN ISO 389-4:1999 | Identical |
| UNE-EN ISO 389-4:1999 | Identical |
| DIN EN ISO 389-4:1999-07 | Identical |
| 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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