NEN 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
01-12-2013
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.
| DevelopmentNote |
Supersedes NEN ISO 8798. (10/2002)
|
| DocumentType |
Standard
|
| PublisherName |
Netherlands Standards
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| I.S. EN ISO 389-4:1999 | Identical |
| UNI EN ISO 389-4 : 1999 | Identical |
| ISO 389-4:1994 | Identical |
| BS EN ISO 389-4:1999 | Identical |
| EN ISO 389-4:1998 | Identical |
| DIN EN ISO 389-4:1999-07 | Identical |
| UNE-EN ISO 389-4:1999 | Identical |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.