3M Pro-Comms - Pro-Comms on Hard Hat NRR Data

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NOISE REDUCTION RATING (NRR)
PRO-COMMS ELECTRONIC HEARING PROTECTION
TEST FREQUENCIES(HZ) 125 250 500 1000 2000 3150 4000 6300 8000 NRR CSA Class
Mean Attenuation (dB) 19.2 20.5 30.1 37.1 33.2 40.3 42.8 43.5 42.6
25 A
Standard Deviation 3.1 1.8 2.9 3.5 2.5 4.2 4.3 3.2 3.3
ATTENUATION DATA | 3M PRO-COMMS HEARING PROTECTOR WITH GEL SEALING RINGS ON HARD HAT ANSI S3.19-1974
Model 90546-SIOC
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