AENOR - UNE 74020
ACOUSTICS. STANDARD REFERENCE ZERO FOR THE CALIBRATION OF PURE TONE AIR CONDUCTION AUDIOMETERS.
inactive, Most Current
| Organization: | AENOR |
| Publication Date: | 9 September 1991 |
| Status: | inactive |
| ICS Code (Noise with respect to human beings): | 13.140 |
Document History
UNE 74020
September 9, 1991
ACOUSTICS. STANDARD REFERENCE ZERO FOR THE CALIBRATION OF PURE TONE AIR CONDUCTION AUDIOMETERS.
A description is not available for this item.
May 15, 1978
CERO DE REFERENCIA NORMALIZADO PARA LA CALIBRACION DE AUDIOMETROS DE TONOS PUROS
A description is not available for this item.