Product Info

LABORATORY ATTENUATION
U.S. EPA species the NRR as the measure of hearing protector noise reduction. However, 3M makes no warranties as to the suitability
of the NRR for this purpose. 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 for guidance on how to adjust attenuation label values. It is recommended that
the NRR be reduced by 50% to better estimate typical protection.
The attenuation rating (NRR) was obtained with the device powered off.
Standard ANSI S3.19-1974
A:A 3M™ Skull Screw™ Communication Eartips
A:1 Frequency (Hz) (ƒ) 125 250 500 1000 2000 3150 4000 6300 8000 NRR CSA Class
AL
A:2 Mean attenuation (dB)
(Mf)
35.7 35.0 40.7 39.0 38.3 41.7 41.4 44.0 45.9
30 dB
A:3 Standard deviation
(dB) (sf)
5.4 5.2 5.4 3.9 2.5 4.4 3.7 4.1 4.1
Standard ANSI S3.19-1974
A:B 3M™ PELTOR™ CCC-GRM-25 Communication Eartips
A:1 Frequency (Hz) (ƒ) 125 250 500 1000 2000 3150 4000 6300 8000 NRR CSA Class
AL
A:2 Mean attenuation (dB)
(Mf)
35.0 31.8 37.4 37.4 36.0 39.2 40.4 44.9 45.8
27 dB
A:3 Standard deviation
(dB) (sf)
4.6 4.2 5.2 5.1 3.3 4.9 4.8 3.6 2.9
Standard ANSI S3.19-1974
A:C 3M™ UltraFit™ Communication Eartips
A:1 Frequency (Hz) (ƒ) 125 250 500 1000 2000 3150 4000 6300 8000 NRR CSA Class
AL
A:2 Mean attenuation (dB)
(Mf)
34.3 31.9 35.2 34.1 34.5 38.6 35.5 38.2 39.3
23 dB
A:3 Standard deviation
(dB) (sf)
6.1 6.1 6.1 5.2 4.8 4.4 3.9 3.9 3.0