13
SNR (Single Number Rating)
Classification:
NoizeBarrier
®
TAC EN 352-1: 2002
Frequency (HZ)
125
250
500
1000
2000
4000
8000
SNR = 28 dB
Mean Attenuation (dB)
18.7 19.2 24.9 32.1
30.9
38.3
34.4
H
= 30 dB
Standard Deviation (dB)
3.5
3.1
2.9
3.5
3.3
3.1
3.6
M
= 25 dB
Assumed Protection Value (dB) 15.2 16.1 22.0 28.6
27.5
35.2
30.8
L
= 19 dB
EN 352-4: 2001 +A1: 2005
Criterion levels
H = 115.5 dBA
M = 107.0 dBA L = 96.0 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 = 96.0 mV pressure level is equal 82 dB
The European Union testing was conducted by Michael and Associates, Inc.
Report Q5796A, Q6030A and Q6032A.
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
