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

28 English
NOISE REDUCTION RATING (NRR)
PRO-PROTECT HEARING PROTECTION
Model 90545-SIOC
26
TEST FREQUENCIES(HZ) 125 250 500 1000 2000 3150 4000 6300 8000 NRR CSA Class
Mean Attenuation (dB) 16.7 21.2 30.4 36.8 31.7 37.9 39.6 40.0 38.8
26 B
Standard Deviation 2.3 2.0 3.0 2.1 2.6 3.0 3.6 4.4 3.2
ATTENUATION DATA | 3M PRO-PROTECT WITH GEL SEALING RINGS ON HARD HAT ANSI S3.19-1974
The EPA references to Federal relate to US Federal laws.