11
SNR (Single Number Rating)
Classification:
NoizeBarrier
®
Range SA EN 352-1: 2002
Frequency (HZ)
125
250
500
1000
2000
4000
8000
SNR = 29 dB
Mean Attenuation (dB)
17.9 19.2 25.7 29.7
31.1
37.5
37.8
H
= 31 dB
Standard Deviation (dB)
2.8
1.9
2.2
1.7
2.7
3.3
2.9
M
= 26 dB
Assumed Protection Value (dB) 15.1 17.3 23.5 27.9
28.4
34.3
34.9
L
= 20 dB
EN 352-4: 2001 +A1: 2005
Criterion levels
H = 114.8 dBA
M = 108.3 dBA L = 98.9 dBA
Sound pressure level of external noise for which sound pressure level under the
earmuff first exceeds 85 dBA
EN 352-6:2002
Electrical input for which the mean + one standard deviation of A-weighted diffuse-
field related sound = 119.1 mV pressure level is equal 82 dB
The European Union testing was conducted by Michael and Associates, Inc. Report
Q5797A, Q6031A and Q6033A.
This product is in compliance with EN 352-1:2002, EN 352-4:2001, EN 352-6:2002
and 2016/425.
Notified Body responsible for EU type examination: SATRA Technology Europe, Ltd.,
Bracetown Business Park, Clonee, Co. Meath, D15 YN2P, Ireland
(Notified Body No. 2777)
Declaration of Conformity available at www.otto-comm.com
