F) STANDARD EN 352-1:2020
3M strongly recommends personal fit 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 fit, fitting 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.
F:A Headband earmuff with foam cushions
MT73H7A4310WS6EU, MT73H7A4410WS6EU,
A:2 MV (dB)
A:3 SD (dB)
A:4 APV = MV - SD (dB)
A:6 S, M, L
F:B Neckband earmuff with foam cushions
MT73H7B4310WS6EU, MT73H7B4410WS6EU, MT73H7B4310EU, MT73H7B4410EU
A:2 MV (dB)
A:3 SD (dB)
A:4 APV = MV - SD (dB)
A:6 L
F:C Headband earmuff with gel cushions
MT73H7A4310WS6EU, MT73H7A4410WS6EU,
A:2 MV (dB)
A:3 SD (dB)
A:4 APV = MV - SD (dB)
A:6 S, M, L
MT73H7A4310EU, MT73H7A4410EU
A:1 f (Hz)
125
250
500 1000 2000 4000 8000
17.1 25.6 34.5 34.5 36.6 39.6 38.3 37.2 32.9 25.4 34.7
2.4
1.2
3,0
2.8
14.7 24.4 31.5 31.7 34.5 36.6 35.2
A:1 f (Hz)
125
250
500 1000 2000 4000 8000
14.9 24,0 32.7 32.5 36.2 40.4 39.1 36.6 31,0 23.3 33.1
2.5
2,0
3.2
2.8
12.4 22,0 29.5 29.7 32.8 36.5 35.9
MT73H7A4410EU, MT73H7A4310EU
A:1 f (Hz)
125
250
500 1000 2000 4000 8000
15.3 23,0 35.6 37.1 38.1 41.1 38.3 39.1 32.4 23.3 34.3
2.7
2,0
2.9
2.2
12.6 21,0 32.7 34.9 36,0 37.9 36.2
H
2.1
3,0
3.1
1.4
36
H
3.4
3.9
3.2
2.3
34
H
2.1
3.2
2.1
1.7
37
A:5
M
L
SNR
1.2
1.7
1.1
449g
32
24
34
A:5
M
L
SNR
1.4
2,0
1.3
434g
30
21
32
A:5
M
L
SNR
1.2
2.2
1.1
509g
31
21
33