99.60 Withdrawal effective Dec 16, 1998
CEN
CEN/TC 211 Acoustics
European Norm
13.140 Noise with respect to human beings
Specification of reference levels for the calibration of narrow-band masking noise presented by air conduction from an earphone in pure tone audiometry.
WITHDRAWN
EN 28798:1991
99.60
Withdrawal effective
Dec 16, 1998
PUBLISHED
EN ISO 389-4:1998