UNE 20644:1982
IEC PROVISIONAL REFERENCE COUPLER FOR THE CALIBRATION OF EARPHONES USED IN AUDIOMETRY

Standard No.

UNE 20644:1982

Release Date

1982

Published By

AENOR

Latest

UNE 20644:1982

UNE 20644:1982 history

• 1982 UNE 20644:1982 IEC PROVISIONAL REFERENCE COUPLER FOR THE CALIBRATION OF EARPHONES USED IN AUDIOMETRY