Users Manual

A) ANSI S3.19-1974
Headband with foam cushion
Art nr MT73H7A4610WS6NA
A:1 Frequency (Hz) (ƒ) 125 250 500 1000 2000 3150 4000 6300 8000 NRR
CSA
Class
Weight
A:2 Mean attenuation (dB) (M
f
) 19.5 24.8 35.2 36.6 38.2 38.0 38.0 38.7 39.1
27
A:3 Standard deviation (dB) (s
f
) 2.4 3.1 3.0 3.3 2.9 3.2 3.4 2.1 2.4 A 449 g
Backband with foam cushion
Art nr MT73H7B4610WS6NA
A:1 Frequency (Hz) (ƒ) 125 250 500 1000 2000 3150 4000 6300 8000 NRR
CSA
Class
Weight
A:2 Mean attenuation (dB) (M
f
) 18.0 25.8 33.7 35.8 37.5 38.7 41.0 40.4 40.5
27
A:3 Standard deviation (dB) (s
f
) 3.2 3.0 3.2 2.2 2.2 2.4 3.6 3.5 2.1 A 434 g
Helmet attachment with foam cushion
Art nr MT73H7P3E4610WS6NA
A:1 Frequency (Hz) (ƒ) 125 250 500 1000 2000 3150 4000 6300 8000 NRR
CSA
Class
Weight
A:2 Mean attenuation (dB) (M
f
) 19.1 21.9 33.5 36.7 36.4 37.6 39.2 38.2 36.7
25
A:3 Standard deviation (dB) (s
f
) 3.2 3.0 3.3 3.3 2.9 2.8 3.4 2.7 3.8 A 472 g
Headband with gel cushion
Art nr MT73H7A4610WS6NA
A:1 Frequency (Hz) (ƒ) 125 250 500 1000 2000 3150 4000 6300 8000 NRR
CSA
Class
Weight
A:2 Mean attenuation (dB) (M
f
) 19.7 23.1 33.4 41.0 39.3 41.1 41.2 40.9 39.0
27
A:3 Standard deviation (dB) (s
f
) 2.5 2.6 2.7 3.0 3.9 3.8 3.7 2.0 2.1 A 509 g
Backband with gel cushion
Art nr MT73H7B4610WS6NA
A:1 Frequency (Hz) (ƒ) 125 250 500 1000 2000 3150 4000 6300 8000 NRR
CSA
Class
Weight
A:2 Mean attenuation (dB) (M
f
) 17.7 22.4 33.1 39.1 37.6 38.8 40.5 40.5 41.8
27
A:3 Standard deviation (dB) (s
f
) 3.0 2.2 3.1 2.5 2.3 2.6 2.3 3.1 3.5 493 g
Helmet attachment with gel cushion
Art nr MT73H7P3E4610WS6NA
A:1 Frequency (Hz) (ƒ) 125 250 500 1000 2000 3150 4000 6300 8000 NRR
CSA
Class
Weight
A:2 Mean attenuation (dB) (M
f
) 19.1 21.9 33.5 36.7 36.4 37.6 39.2 38.2 36.7
25
A:3 Standard deviation (dB) (s
f
) 3.2 3.0 3.3 3.3 2.9 2.8 3.4 2.7 3.8 A 532 g
*3M strongly recommends individual t testing of hearing protectors. If the NRR or SNR is used to estimate typical workplace
protection, 3M recommends that the noise reduction value be reduced by 50% or in accordance with applicable regulations.
L:1) Radio Channel Frequencies
FRS/GMRS US/Canada
Channel Radio Service
Type, Canada
Radio Service
type, US
Frequency
(MHz)
1 FRS 1/GMRS 2 FRS 1 462.56250
2 FRS 2/GMRS 4 FRS 2 462.58750
3 FRS 3/GMRS 6 FRS 3 462.61250
4 FRS 4/GMRS 8 FRS 4 462.63750
5 FRS 5/GMRS 10 FRS 5 462.66250
6 FRS 6/GMRS 12 FRS 6 462.68750
ANSI S3.19-1974
ANSI S3.19-1974
ANSI S3.19-1974
ANSI S3.19-1974
ANSI S3.19-1974
ANSI S3.19-1974