ISO 389-4:1994
Acoustics — Reference zero for the calibration of audiometric equipment — Part 4: Reference levels for narrow-band masking noise
OVERVIEW
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.
COMMENTS
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PRODUCT DETAILS
| Status | Current |
|---|---|
| Edition | 1994 |
| No. of Pages | 4 |
| ICS Classification | 13.140 Noise with respect to human beings |
| Committee | ISO/TC 43 |
| Available for Purchase | For sale in Singapore only |
| Adoption | ISO |