Owner's Manual

164/PB/2011 /NA dated 20.05.20 11 and 202/CR/2012/NA dated 26.04.2012
Passive Attenuation
Frequency (Hz) 125 250 500 1000 2000 4000 8000
Mean Attenuation (dB) 25.3 24.0 24.3 25.6 29.6 32.5 34.8
Standard Deviation (dB)
5.9 4.6 5.6
4.8 3.3
3.8 4.0
APV (dB)
19 .4
19.5 18 .8
20.9 26.3 28.7 30.8
H=26dB M =21 dB l=20d8 SNR = 25 dB
Active Attenuation - Criterion Levels
Switch position
H• noise
M-nolse
L-nolse
LO (·15)
104
96
86
HI (·9)
99 93 85
H: Average attenuation characteristics in the high frequency spectrum (>2 kHz)
M: Average attenuation characteristtcs in the m1a frequency spectrum (0.5-2 kHz)
L: Average attenuation characteristics in the low frequency spectrum (<0.5 kHz)
SNR (Single Number Rating): Average attenuation characteristics in the standard
frequency spectrum
The European Union testing was conducted by:
Central Institute for Labour Protection-National Research Institute (CIOP-PIB)
ul Czerniakowska 16, 00-701 Warsaw, Poland . Notified Body No. 1437.
This product 1s in compliance with EN 352-2:2002 and EN 352-7:2002
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