ISO/TC 43
| Project No. | ISO 389-4:1994 |
|---|---|
| Title | <p>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.</p> |
| Registration number (WIID) | 22496 |
| Scope | <p>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.</p> |
| Status | Standarts spēkā |
| ICS group | 13.140 |