ISO 4869:1981被替代
Acoustics - Measurement Of Sound Attenuation Of Hearing Protectors - Subjective Method
出版：International Organization for Standardization
专家解读视频
1981
BIS IS 13161-5:1991 (R2017) - Equivalent
BS 5108:1983 - Identical
NFS 31 062:1982 - Similar
BS 5108(1983) : 1983 - Identical
NFS 31 062 : 1982 - Similar to
NFS 31 062 : 1982 - Similar to
BS 5108(1983) : 1983 - Identical
