UNE-EN ISO 389-4:1999
Current
The latest, up-to-date edition.
ACOUSTICS. REFERENCE ZERO FOR THE CALIBRATION OF AUDIOMETRIC EQUIPMENT. PART 4: REFERENCE LEVELS FOR NARROW-BAND MASKING NOISE (ISO 389-4:1994)
Hardcopy , PDF
Spanish, Castilian, English
18-11-1999
Important note : Users cannot be edited or removed once added to your Multi user PDF.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 |
CTN 74/SC 1
|
| DevelopmentNote |
Supersedes UNE 74155. (03/2000)
|
| DocumentType |
Standard
|
| Pages |
14
|
| PublisherName |
Asociacion Espanola de Normalizacion
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| NF EN ISO 389-4 : 1999 | Identical |
| ISO 389-4:1994 | Identical |
| NBN EN ISO 389-4 : 1999 | Identical |
| NEN EN ISO 389-4 : 1999 | Identical |
| NS EN ISO 389-4 : 1ED 1999 | Identical |
| I.S. EN ISO 389-4:1999 | Identical |
| SN EN ISO 389-4 : 1999 | Identical |
| UNI EN ISO 389-4 : 1999 | Identical |
| BS EN ISO 389-4:1999 | Identical |
| EN ISO 389-4:1998 | Identical |
| DIN EN ISO 389-4:1999-07 | Identical |
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