NEN-EN-ISO 389-4
Acoustics - Reference zero for the calibration of audiometric equipment - Part 4: Reference levels for narrow- band masking noise
active, Most Current
| Organization: | NEN |
| Publication Date: | 1 January 1999 |
| Status: | active |
| Page Count: | 18 |
| ICS Code (Noise with respect to human beings): | 13.140 |
scope:
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.
Document History
NEN-EN-ISO 389-4
January 1, 1999
Acoustics - Reference zero for the calibration of audiometric equipment - Part 4: Reference levels for narrow- band masking noise
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...