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Main page>UNE standards>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)
in stockReleased: 1999-11-18
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)
Acústica. Cero de referencia para la calibración de equipos audiométricos. Parte 4: Niveles de referencia para ruido de enmascarador de banda estrecha. (ISO 389-4:1994).
