18
Technical Information (EN352)
Electronic Module - Sound Attenuation
Mean Attenuation
Standard Deviation
Assumed Protection
H
=27
M
=21
L
=20
SNR
=25
26.1
6.4
19.7
24.6
4.6
20.0
23.2
3.8
19.4
23.3
3.5
19.8
23.4
3.4
20.0
31.6
3.6
28.0
31.8
3.3
28.5
36.4
4.8
31.6
Frequency (Hz)
63
125
250
500
1000 2000 4000 8000
Passive Module - Sound Attenuation
Mean Attenuation
Standard Deviation
Assumed Protection
Program No.
1
2
3
4
Criterion Levels
H
=26
M
=21
L
=20
SNR
=25
24.2
4.5
19.7
H
111
112
111
112
M
105
106
106
106
L
105
105
104
105
23.5
3.6
19.9
22.3
2.8
19.5
22.8
3.8
19.0
23.5
3.4
20.1
32.1
3.8
28.3
30.4
3.8
26.6
36.8
5.6
31.2
Frequency (Hz)
63
125
250
500
1000 2000 4000 8000
SNR =
Single Number Rating attenuation
H =
High frequency attenuation
M =
Medium frequency attenuation
L =
Low frequency attenuation
EN352-2:2002, EN352-7:2002, Regulation (EU)2016/425 Module D by
SATRA Technology Europe Ltd, Bracetown Business Park, Clonee, Co. Meath,
Ireland D15 YN2P (Notified Body 2777)
