ISO 4869-1 : 1990(R2009)已作废
ACOUSTICS - HEARING PROTECTORS - PART 1: SUBJECTIVE METHOD FOR THE MEASUREMENT OF SOUND ATTENUATION
出版：International Organization for Standardization
专家解读视频
Gives a measurement method for sound attenuation at the threshold of holding, providing consistently reproducible values that are near to the maximum attainable, but are not likely to be achieved in use.
DS ISO 4869-1 : 1992 - Identical
NS ISO 4869-1 : 1ED 1992 - Identical
UNE 74011-1 : 1991 - Identical
PN EN 24869-1 : 1999 - Identical
SAC GB/T 7584 : 1987 - Identical
NEN ISO 4869-1 : 1997 - Identical
BS 5108-1(1991) : AMD 7552 - Identical
DIN ISO 4869-1 : 1991 - Identical
