Owner's Manual

SNR [Single Number Rating)
FOAM
Frequency (Hz)
125 250 500
1000 2000 4000 8000
Mean Attenuation (dB) 35 .9 31 .5 35 .6 38 .5 37 .5 39 .2 44 .3
Standard Deviation (dB) 4.7 4.3 5.0
4.5
3.7 3.5 4.9
Assumed Protection Value (dB) 31 .2 27 .2
30 .7 34 .0 33 .8
35 .B 39 .4
H = 35 dB
M .,33 dB
L = 30 dB
SNR = 35 dB
ACTIVE ATTENUATION • CRITERION LfVELS
SWITCH POSITION H- Noise M• No i se L·No i se
LO ( dBA) 111 .0 103 .9 102 .5
HIGH (dBA) 85 .5 83.3 83 .9
The European Union testing was conducted by Ml dlael and Associates. Inc.
Report Q4968A and Q4974A
3- FLANGE
Frequency (Hz) 125 250 500 1000 2000
Mean Attenuation (dB ) 33.1 353 36 .8 35.7 34 .2
Standard Deviation (dB ) 6.4
6 6.1 5.4 4.5
Assumed Protection Value (dB) 26 .7 29.3 30.7 303 29 .7
4000 8000
32 .6 37 .4
3.1
5.4
29 .6 32
H • 30d8
M=31 dB L = 30 dB SNR = 32 dB
ACTIVE ATTENUATION - CRITERION LEVELS
SWITCH POSITION
H- Noise M·Noise l • Nolse
LO ( dBA) 105 .2 102.0 104 .7
HIGH ( dBA) 92 .3 93 .7 93 .8
The European Union testing was conducted by Mi chael and Associates , Inc.
Report Q7458A, Q7459A. a nd Q7405A
ATTENUATION CHART
Test Frequency (Hz)
125 250 500 1000 2000 3150 4000
Mean Attenuation (dB) 11 .1 9.5
14 .3
20 .4 27 .6
36 .7
34 .6
Standard Deviation ( dB)
3.4
2.1
2.0
3.0 3.6 5.1
5.0
Report Q7185A (ANSI 53 . 19-1974 )
6300 8000
33 .5
30 .4
S.3 SJ
Th is product is in compliance with EN 352 -2: 2020 , EN 352 -7: 2020 , and PPE Reg ul a tion (EU) 20161425 .
Notified Body responsible for EU type exam i nation : SATRA Techn o logy Europe Ltd ,
Bracetown Bus i ness Park. Clonee , Dublin 015 YN2P, Ireland . ( ~
2 777
Declara ti on of Conformity available at www . ottO<omm . com ~
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