3M Pro-Comms - Pro-Protect Variations NRR Data

English 27
NOISE REDUCTION RATING (NRR)
PRO-PROTECT HEARING PROTECTION
TEST FREQUENCIES(HZ) 125 250 500 1000 2000 3150 4000 6300 8000 NRR CSA Class
Mean Attenuation (dB) 18.8 21.8 31.0 38.0 35.5 40.5 43.2 43.0 42.9
26 A
Standard Deviation 2.8 1.9 3.0 3.3 3.1 3.8 4.0 2.6 2.2
ATTENUATION DATA | 3M PRO-PROTECT WITH GEL SEALING RINGS ANSI S3.19-1974
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
25 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 STANDARD SEALING RINGS ON HARD HAT ANSI S3.19-1974
Model 90545-SIOC
26
Model 90545
25
The EPA references to Federal relate to US Federal laws.
The EPA references to Federal relate to US Federal laws.