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Idiomas disponibles
USA
/ CAN / MX
ATTENUATION DATA
ANSI S3.19-1974
ATTENUATION DATA - Headband version
LOW
Frequency (Hz)
Mean (dB)
Standard deviation (dB)
MEDIUM
Frequency (Hz)
Mean (dB)
Standard deviation (dB)
HIGH
Frequency (Hz)
Mean (dB)
Standard deviation (dB)
ATTENUATION DATA - Helmet version
LOW
Frequency (Hz)
Mean (dB)
Standard deviation (dB)
MEDIUM
Frequency (Hz)
Mean (dB)
Standard deviation (dB)
HIGH
Frequency (Hz)
Mean (dB)
Standard deviation (dB)
Helmet-mounted Noise Reduction Ratings listed above are for Medium V-Gard Caps only.
Noise Reduction Rating and Attenuation Values for other MSA slotted helmets may vary.
Contact MSA for more information.
125
250
500
14.4
15.8
25.4
2.1
2.5
2.6
125
250
500
17.1
20.6
30.2
2.6
2.0
2.7
125
250
500
18.7
25.0
34.9
2.6
2.6
2.9
125
250
500
13.6
17.3
25.1
2.9
2.8
2.3
125
250
500
16.8
21.5
29.1
3.0
2.2
2.1
125
250
500
19.8
26.0
33.2
2.6
1.9
2.1
1000
2000
3150
34.7
31.0
32.6
3.1
2.4
2.8
1000
2000
3150
36.3
36.7
38.1
3.0
2.9
2.9
1000
2000
3150
39.3
39.0
36.9
3.0
2.3
2.4
1000
2000
3150
31.3
32.1
32.6
3.0
2.8
2.4
1000
2000
3150
36.0
36.5
38.7
3.1
3.3
2.8
1000
2000
3150
38.8
37.8
36.8
3.3
3.1
2.9
58
4000
6300
8000
34.4
35.7
36.0
2.7
2.9
2.2
4000
6300
8000
39.1
41.3
41.2
3.1
2.6
2.9
4000
6300
8000
37.3
40.1
39.2
2.3
2.2
2.8
4000
6300
8000
35.0
35.0
34.6
2.1
2.8
2.7
4000
6300
8000
37.6
40.4
39.4
2.9
3.8
4.4
4000
6300
8000
38.0
39.8
38.8
2.8
2.1
3.3
NRR
21
NRR
25
NRR
28
NRR
21
NRR
25
NRR
28
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