Audio Alarm - Bosch AUTODOME IP 4000 HD Operation Manual

AUTODOME IP 4000 HD / AUTODOME
IP 5000 HD/IR
Global change
You can set how large the global change in the video image must be for an alarm to be
triggered. This setting is independent of the sensor fields selected under Select Area. Set a
high value if fewer sensor fields need to change to trigger an alarm. With a low value, it is
necessary for changes to occur simultaneously in a large number of sensor fields to trigger an
alarm.
This option allows you to detect, independently of motion alarms, manipulation of the
orientation or location of a camera resulting from turning the camera mount bracket, for
instance.
Global change
Activate this function if the global change, as set with the Global change slide control, should
trigger an alarm.
Scene too bright
Activate this function if tampering associated with exposure to extreme light (for instance,
shining a flashlight directly on the lens) should trigger an alarm. The average brightness of the
scene provides a basis for recognition.
Scene too dark
Activate this function if tampering associated with covering the lens (for instance, by spraying
paint on it) should trigger an alarm. The average brightness of the scene provides a basis for
recognition.
Scene too noisy
Activate this function if tampering associated with EMC interference (noisy scene as the result
of a strong interference signal in the vicinity of the video lines), as an example, should trigger
an alarm.
8.3

Audio Alarm

The camera can create alarms on the basis of audio signals. You can configure signal strengths
and frequency ranges in such a way that false alarms, for example due to machine noise or
background noise, are avoided.
Notice!
First set up normal audio transmission before you configure the audio alarm here (see Audio).
Audio alarm
Select On if you want the device to generate audio alarms.
Do not use any special characters, for example &, in the name. Special characters are not
supported by the system's internal management.
Signal Ranges
You can exclude particular signal ranges in order to avoid false alarms. For this reason the
total signal is divided into 13 tonal ranges (mel scale). Check or uncheck the boxes below the
graphic to include or exclude individual ranges.
Threshold
Set up the threshold on the basis of the signal visible in the graphic. You can set the threshold
using the slide control or, alternately, you can move the white line directly in the graphic using
the mouse.
Sensitivity
You can use this setting to adapt the sensitivity to the sound environment. You can effectively
suppress individual signal peaks. A high value represents a high level of sensitivity.
Bosch Security Systems Operation Manual
Alarm | en 41
2016.04 | 0.4 |