NA 022
DKE German Commission for Electrical, Electronic & Information Technologies of DIN and VDE
DIN EN ISO 8253-1 [CURRENT] references following documents:
| Document number | Edition | Title |
|---|---|---|
| ISO 389-4 | 1994-10 | Acoustics - Reference zero for the calibration of audiometric equipment - Part 4: Reference levels for narrow-band masking noise More |