I.S. EN 24869-1:1993现行
Acoustics - Hearing Protectors - Subjective Method For The Measurement Of Sound Attenuation
出版：National Standards Authority of Ireland
专家解读视频
Specifies a subjective method for measuring sound attenuation of hearing protectors at the threshold of hearing.
SS EN 24869-1 Ed. 1 (1993) - Identical
UNE EN 24869-1:1994 - Identical
ISO 4869-1:1990 - Identical
UNI EN 24869-1:1993 - Identical
NF EN 24869-1:1993 - Identical
NBN EN 24869-1:1995 - Identical
BS EN 24869-1 - Identical
ONORM EN 24869-1:1993 - Identical
BS EN 24869-1:1993 - Identical
