Attenuation values to EN 24869-1 (with electronics switched off).
Frequency (Hz)
63
125
250
500
1000
2000 4000 8000
Mf (dB)
15.1
14.2
20.0
28.7
32.5
28.1
38.4
38.1
sf (dB)
3.3
2.9
3.0
3.5
2.2
2.5
2.2
4.3
Mf – sf (dB)
11.8
11.3
17.0
25.2
30.3
25.6
36.2
33.8
SNR= 28 dB H=29 dB M=26 dB
L=18 dB
Key:
Mf = Mean attenuation
sf = Standard deviation
H = High-frequency attenuation value (predicted noise level reduction for noise with LC
- LA = - 2 dB)
M = Medium-frequency attenuation value (predicted noise level reduction for noise with
LC - LA = + 2 dB)
L = Low-frequency attenuation value (predicted noise level reduction for noise with LC -
LA = + 10 dB)
SNR = Single Number Rating (the value which is subtracted from the measured C-
weighted sound pressure level, LC, in order to estimate the effective A-weighted sound
pressure level inside the ear).
MASS: 333 g
TONE SIGNALS
-
Short tone, each time a button is pressed
------
Repetition tone when a button is pressed and held down
------
Short quiet tones at the end position of the volume
-
Short tone when switching 0n/Off
-
Short tone 1 minute before the automatic switch off
_____ Long tone, 10 seconds after switching on. This is heard when the
remaining battery life reaches approximately 40 hours
8
PM080-02.qxp 06-02-28 12.32 Sida 8
