A) STANDARD EN 352-1:2020
NOTE: Not Applicable for CANADA / REMARQUE : Non applicable pour le CANADA
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.
A:A Headband earmuffs with foam cushions
MRX21A4WS6
A:1 f (Hz) A:5
125 250 500 1000 2000 4000 8000 H M L SNR
A:2 MV (dB) 13.8 19.3 30.4 34.5 37.7 39.5 36.2 37.4 29.4 20.8 31.6
393 gA:3 SD (dB) 2.7 2.4 2.7 3.6 2.3 2.7 4.1 2.3 2.1 2.2 2.0
A:4 APV = MV - SD (dB) 11.1 16.9 27.7 30.9 35.4 36.8 32.1 35 27 19 30
A:6: S, M, L
A:B Headband earmuffs with gel cushions
MRX21A4WS6
A:1 f (Hz) A:5
125 250 500 1000 2000 4000 8000 H M L SNR
A:2 MV (dB) 12.6 19.6 30.4 32.4 40.1 40.5 38.0 37.9 28.8 20.1 31.2
454 gA:3 SD (dB) 2.9 2.0 3.0 2.8 3.3 3.3 2.8 1.9 1.5 2.1 1.6
A:4 APV = MV - SD (dB) 9.7 17.6 27.4 29.6 36.8 37.2 35.2 36 27 18 30
A:6: S, M, L
A) STANDARD EN352-3:2020
NOTE: Not Applicable for CANADA / REMARQUE : Non applicable pour le CANADA
A:C Carrier attachment earmuffs with foam cushions
MRX21P3E4WS6
A:1 f (Hz) A:5
125 250 500 1000 2000 4000 8000 H M L SNR
A:2 MV (dB) 14.2 19.7 29.6 33.4 36.3 39.5 34.6 36 29.2 21.1 31.2
413
gA:3 SD (dB) 3.9 1.9 2.5 1.8 2.5 2.7 4.9 2.3 1.5 2.7 1.7
A:4 APV = MV - SD (dB) 10.3 17.8 27.1 31.6 33.8 36.8 29.7 34 28 18 30
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