A) 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.
A:A Folding Headband with foam cushion
MT16H210F**
A:2 MV (dB)
A:3 SD (dB)
A:4 APV = MV - SD (dB) 8.7 16.3 23.3 23.0
A:6: L
A:B Folding Headband with gel cushion
MT16H210F**
A:2 MV (dB)
A:3 SD (dB)
A:4 APV = MV - SD (dB) 10.9 14.9 21.7 27.6
A:6: L
A:1 f (Hz)
125
250 500
1000 2000 4000 8000
12.4 18.3 26.1 24.9
3.7
2.0
2.8
1.9
A:1 f (Hz)
125
250 500
1000 2000 4000 8000
13.8 17.6 24.7 29.8
2.9
2.7
3.0
2.2
31.2
45.3
42.2 31.7
2.8
3.2
5.3
28.4
42.1
36.9
29.9
39.3
40.7 32.0
3.7
4.2
3.8
26.2
35.1
36.9
A:5
H
M
L
SNR
25.2 19.5 28.0
1.9
1.5
2.5
1.5
30
24
17
27
A:5
H
M
L
SNR
26.3 19.8 28.6
2.6
2.0
2.4
2.0
29
24
17
27
322
g
361
g