EN-ISO 4869-1: 2018现行
Acoustics - Hearing protectors - Part 1: Subjective method for the measurement of sound attenuation (ISO 4869-1:2018)
出版：Comite Europeen de Normalisation
专家解读视频
This document specifies a subjective method for measuring sound attenuation of hearing protectors at the threshold of hearing.
SN EN ISO 4869-1:2019 - Identical
SS-EN ISO 4869-1:2018 - Identical
DIN EN ISO 4869-1 E:2019 - Identical
NF EN ISO 4869-1:2018 - Identical
NS-EN ISO 4869-1:2018 - Identical
UNI EN ISO 4869-1:2019 - Identical
