REGULATION (EU) 2016/425
EN352-3:2002 Hearing protection : Ear-Muffs attached to an industrial safety helmet
SNR 24 dB | Average noise attenuation | |
H 27 | High frequency attenuation | |
M 21 | Medium frequency attenuation | |
L 14 | Low frequency attenuation | |
S/M/L | Sizes / Dimensions |
USA STANDARDS
ANSI S3.19-1974 American National Standards Institute
NRR 21 dB | NRR – (Noise Reduction Rating - Noise Reduction Rating) |