3 Using the system
│
17
Fig. 11: Headphones symbol when the system is ready for use
Left-hand figure: symbol crossed out, i.e. no measurement
in progress or hearing protection threshold
exceeded during a measurement
Right-hand figure: symbol not crossed out, i.e. measurement
ongoing
If the headphones symbol is crossed out during a
measurement ...
●
The hearing protection threshold has been exceeded during
the measurement. As soon as the noise level falls below the
hearing-protection threshold again, the symbol appears with
-
out a cross through it.
●
No measurement is in progress because the measurement
was not started correctly. Check the operating mode setting
for the Activation key. Did you operate the Activation key cor-
rectly?
3.4.2
Adjusting the filter
Interference frequencies are filtered out by the filters.
The following filters can be adjusted:
●
Bandpass
● Notch filter
3.4.2.1 Adjusting the bandpass
The bandpass filter limits can be set to filter out interference
frequencies in the upper or lower frequency range. Any change
to the filter limits can be heard immediately through the head
-
phones.
