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UNE-EN ISO 389-4:1999
ACOUSTICS. REFERENCE ZERO FOR THE CALIBRATION OF AUDIOMETRIC EQUIPMENT. PART 4: REFERENCE LEVELS FOR NARROW-BAND MASKING NOISE (ISO 389-4:1994)
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Technical characteristics
| Publisher | Asociacion Espanola de Normalizacion y Certificacion (AENOR) |
| Publication Date | 11/18/1999 |
| Page Count | 14 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
Modifies
19/04/2011
Superseded
, Reaffirmed
Historical
Replaces
19/05/1993
Superseded
Historical