ACCU Technology Music PRO User Manual - Passive Attenuation
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 = 26 dB M = 21 dB L = 20 dB SNR = 25 dB
Active Attenuation – Criterion Levels
Switch position
H-noise
M-noise
L-noise
LO (-15)
104
96
86
HI (-9)
99
93
85
H: Average attenuation characteristics in the high frequency spectrum (>2 kHz)
M: Average attenuation characteristics in the mid 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 is in compliance with EN 352-2:2002 and EN 352-7:2002.
equency (Hz)
125
250
500
1000
2000
4000 8000
(dB)
25.3
24.0
24.3
25.6
29.6
32.5 34.8
d Deviation (dB)
5.9
4.6
5.6
4.8
3.3
3.8
4.0
19.4
19.5
18.8
20.9
26.3
28.7 30.8
Attenuation – Criterion Levels
H-noise
M-noise
L-noise
104
96
86
99
93
85
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 = 26 dB M = 21 dB L = 20 dB SNR = 25 dB
164/PB/2011/NA dated 20.05.2011 and 202/CR/2012/NA dated 26.04.2012