PASSIVE ATTENUATION (ANSI S12.6 – 2008)
SM1P/B measured in accordance with ANSI S12.6 - 2008.
Headband mount - SM1PBXXX &SM1BBXXX
Frequency (Hz)
125
250
500
1000
2000
4000
8000
NRR (SF)
Mean attenuation
(dB)
21.4
21.9
29.8
33.7
35.8
37.2
38.5
27dB
Standard
deviation(dB)
3.0
2.1
1.7
2.8
1.5
1.9
2.8
APV80
18.9
20.1
28.4
31.3
34.5
35.6
36.1
Behind-the-Neck mount - SM1PEXXX &SM1BEXXX
Frequency (Hz)
125
250
500
1000
2000
4000
8000
NRR (SF)
Mean attenuation
(dB)
18.7
19.9
28.0
34.1
31.5
35.6
35.3
24.3dB
Standard
deviation(dB)
3.0
2.5
2.2
1.7
3.2
3.4
4.1
APV80
16.2
17.8
26.2
32.7
28.8
32.7
31.9
Helmet mount - SM1PHXXX & SM1BHXXX
Frequency (Hz)
125
250
500
1000
2000
4000
8000
NRR (SF)
Mean attenuation
(dB)
15.0
17.7
25.2
30.4
33.9
34.5
33.8
19.1dB
Standard
deviation(dB)
6.5
6.7
6.6
4.0
3.3
5.9
5.1
APV80
9.5
12.1
19.7
27.0
31.1
29.5
29.5
En
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DOC00084 SM1P/B Manual rev 14.00
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