IMPORTANT NOTICE:
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Frequency (Hz)
125
250
500
1000
2000
3150
4000
6300
8000
NRR
CSA
Class
Mean Attenuation (dB)
12.9
23.7
42.2
43.3
43.3
20 dB
B
Standard Deviation (dB)
3.0
2.6
2.9
3.6
2.8
4.0
3.8
4.6
Folding headband with gel cushions and foam liners
AS-BH2O-92, AS-MCAS-92 with HY80A
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Frequency (Hz)
125
250
500
1000
2000
3150
4000
6300
8000
NRR
CSA
Class
Mean Attenuation (dB)
11.0
12.9
20.3
32.4
37.6
40.1
39.4
17 dB
B
Standard Deviation (dB)
3.1
2.4
3.1
3.6
2.4
4.1
3.7
3.3
Folding headband with gel cushions and silicone liners
AS-BH2O-92, AS-MCAS-92 with HY80A
Frequency (Hz)
125
250
500
1000
2000
3150
4000
6300
8000
NRR
CSA
Class
Mean Attenuation (dB)
23.7
33.0
42.7
44.4
20 dB
B
Standard Deviation (dB)
4.4
2.6
2.9
3.4
3.7
3.2
4.2
2.8
4.4
Backband with gel cushions and foam liners
AS-BH2O-92, AS-MCAS-92 with HY80A
Frequency (Hz)
125
250
500
1000
2000
3150
4000
6300
8000
NRR
CSA
Class
Mean Attenuation (dB)
13.7
20.1
29.0
30.1
37.3
39.6
40.4
39.8
17 dB
B
Standard Deviation (dB)
4.0
1.8
3.0
3.3
4.4
3.6
4.4
3.4
Backband with gel cushions and silicone liners
AS-BH2O-92, AS-MCAS-92 with HY80A
Frequency (Hz)
125
250
500
1000
2000
3150
4000
6300
8000
NRR
CSA
Class
Mean Attenuation (dB)
11.8
14.4
21.4
33.1
36.0
44.1
18 dB
B
Standard Deviation (dB)
3.8
3.1
3.6
3.7
4.2
3.1
6.1
7.7
Helmet attachment* with gel cushions and foam liners
AS-BH2O-92, AS-MCAS-92 with HY80A
Frequency (Hz)
125
250
500
1000
2000
3150
4000
6300
8000
NRR
CSA
Class
Mean Attenuation (dB)
11.7
11.6
17.7
28.2
30.1
37.8
39.8
42.1
40.1
14 dB
B
Standard Deviation (dB)
3.9
2.6
4.2
4.0
3.7
3.4
2.9
2.4
Helmet attachment* with gel cushions and silicone liners
AS-BH2O-92, AS-MCAS-92 with HY80A
Rendered on 1/23/2020 10:54:14 AM
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34-8725-1903-7 ComTac V manual.pdf