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Idiomas disponibles
n Caution: For noise environments dominated by frequencies below 500 Hz the
C-weighted environmental noise level should be used.
LABORATORY ATTENUATION
MT17H682 Folding Band - Foam Cushions
Frequency (Hz)
Mean Attenuation (dB)
Standard Deviation (dB)
MT17H682 Folding Band - Gel Cushions
Frequency (Hz)
Mean Attenuation (dB)
Standard Deviation (dB)
MT17H682 Backband - Foam Cushions
Frequency (Hz)
Mean Attenuation (dB)
Standard Deviation (dB)
MT17H682 Backband - Gel Cushions
Frequency (Hz)
Mean Attenuation (dB)
Standard Deviation (dB)
MT17H682 Helmet Attachment - Foam Cushions *
Frequency (Hz)
Mean Attenuation (dB)
Standard Deviation (dB)
MT17H682 Helmet Attachment - Gel Cushions **
Frequency (Hz)
Mean Attenuation (dB)
Standard Deviation (dB)
* Tested with 3M™ Ceradyne™ Ballistic Helmet
** Tested with OPSCOR Helmet
125
250
500
1000
13.6
17.7
28.8
31.9
2.6
2.5
2.7
1.9
125
250
500
1000
11.4
15.7
21.7
28.9
2.8
2.7
2.0
2.7
125
250
500
1000
15.5
17.9
26.0
31.3
4.0
2.5
2.3
2.7
125
250
500
1000
15.2
17.6
24.9
30.5
4.2
2.7
2.3
3.8
125
250
500
1000
15.1
20.3
26.4
32.1
3.9
2.7
3.0
2.8
125
250
500
1000
15.1
17.6
26.1
35.1
3.9
3.5
3.3
2.6
2000
3150
4000
32.3
39.3
39.9
1.5
4.1
2.3
2000
3150
4000
33.1
40.8
38.8
1.9
3.5
3.7
2000
3150
4000
32.4
38.9
41.3
3.2
3.2
3.0
2000
3150
4000
33.4
39.3
41.4
4.1
3.0
3.4
2000
3150
4000
33.0
39.7
34.1
3.5
3.7
3.5
2000
3150
4000
32.9
40.9
35.3
2.8
2.3
3.0
4
6300
8000
NRR
42.1
41.4
23 dB
2.6
2.5
6300
8000
NRR
37.3
37.3
20 dB
2.5
3.5
6300
8000
NRR
44.7
46.2
22 dB
3.8
4.4
6300
8000
NRR
46.2
45.8
21 dB
3.0
4.7
6300
8000
NRR
39.4
40.1
22 dB
2.9
2.3
6300
8000
NRR
39.5
40.0
21 dB
2.6
2.4
CSA
Class
B
CSA
Class
B
CSA
Class
B
CSA
Class
B
CSA
Class
A
CSA
Class
A
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