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:: 3M™ Ear Muffs, Helmet-Mounted, High Attenuation 1455
3M™ Ear Muffs, Helmet-Mounted, High Attenuation 1455
3M™ Ear Muffs, Helmet-Mounted, High Attenuation 1455
3M™ Ear Muffs, Helmet-Mounted, High Attenuation 1455 , designed for use where high noise levels are present. Particularly suitable where the harmful noise is predominantly made up of low to medium frequencies.
Attenuation Values
3M™ Ear Muffs, Helmet-Mounted, High Attenuation 1455.
Tested and approved to EN352-3:1996
Frequency (Hz) 63 125 250 500 1000 2000 4000 8000
Mean Value (dB) 14.7 19.7 23.6 28.0 33.9 32.7 39.2 40.7
Standard Deviation (dB) 3.9 3.3 2.9 2.9 2.8 2.8 3.7 3.7
APV (dB) 10.8 16.4 20.7 25.1 31.1 29.9 35.5 37.0
SNR=31dB H=32dB M=28dB L=22dB
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1455
1.00
$0.95
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