G) STANDARD EN 352-1:2020
3M strongly recommends personal t testing of hearing protectors. Research suggests that users may receive less noise
reduction than indicated by the attenuation label value(s) on the packaging due to variation in t, tting skill, and
motivation of the user. Refer to applicable regulations and guidance on how to adjust attenuation label value(s). In the
absence of applicable regulations, it is recommended that the attenuation label value(s) be reduced to better estimate
typical protection.
G:A Headband
MT53H7A4400-EU
G:1 f (Hz) G:5
125 250 500 1000 2000 4000 8000 H M L SNR
G:2 MV (dB) 18.1 24.3 32.1 36.2 34.7 39.2 36.0 35.9 32.5 25.5 34.0
394 gG:3 SD (dB) 2.4 1.7 2.2 2.5 3.6 3.3 2.4 2.6 1.6 1.9 1.5
G:4 APV = MV - SD (dB) 15.7 22.6 29.9 33.7 31.1 35.9 33.6 33 31 24 33
G:6: S, M, L
G:B Neckband
MT53H7B4400-EU
G:1 f (Hz) G:5
125 250 500 1000 2000 4000 8000 H M L SNR
G:2 MV (dB) 16.9 23.2 32.1 35.2 35.6 38.3 37.4 36.5 31.8 24.3 33.6
384 gG:3 SD (dB) 3.0 2.4 2.5 2.1 2.9 3.7 3.2 2.5 1.8 2.3 1.8
G:4 APV = MV - SD (dB) 13.9 20.8 29.6 33.1 32.7 34.6 34.2 34 30 22 32
G:6: S, M, L
G) STANDARD EN 352-3:2020
3M strongly recommends personal t testing of hearing protectors. Research suggests that users may receive less noise
reduction than indicated by the attenuation label value(s) on the packaging due to variation in t, tting skill, and
motivation of the user. Refer to applicable regulations and guidance on how to adjust attenuation label value(s). In the
absence of applicable regulations, it is recommended that the attenuation label value(s) be reduced to better estimate
typical protection.
G:C Carrier attachment
MT53H7P3E4400-EU
G:1 f (Hz) G:5
125 250 500 1000 2000 4000 8000 H M L SNR
G:2 MV (dB) 18.4 24.5 31.9 37.1 35.2 39.2 36.0 36.4 32.7 25.6 34.3
418 gG:3 SD (dB) 2.8 1.9 3.1 3.0 2.6 2.9 2.8 1.8 1.8 2.0 1.5
G:4 APV = MV - SD (dB) 15.6 22.6 28.8 34.1 32.6 36.3 33.2 35 31 24 33
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