ISO 389-4:1994
Acoustics — Reference zero for the calibration of audiometric equipment — Part 4: Reference levels for narrow-band masking noise
| Fecha edición: |
1994-09-22
En Vigor
|
|---|---|
| Idiomas disponibles: | Francés, Inglés |
| Resumen: | 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. |
| ICS: | 13.140 - Ruido y sus efectos sobre las personas |
| CTN: | ISO/TC 43 - 48458 |
|
Anulaciones Normas |
Anula a ISO 8798:1987 |










