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 fit 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
