Bosch NTC-255-PI User Manual download pdf (Page 74)

74 en | Advanced Mode IP Camera 200 Series

AR18-10-B012 | v1.5 | 2011.01 Installation and Operation Manual Bosch Security Systems

6.6.6 Audio Alarm

Create alarms based on audio signals. Configure signal

strengths and frequency ranges so that false alarms, for

example, machine noise or background noise, are avoided.

Set up normal audio transmission before configuring the audio

alarm.

Audio alarm

Select On for the device to generate audio alarms.

Name

The name makes it easier to search for or identify the alarm in

extensive video monitoring systems, for example with the

Bosch Video Client and Bosch Video Management System

programs. You can also use the name in the Forensic Search

program function as a filter option for quick search in

recordings. Enter a unique and clear name here. (Do not use

any special characters, for example &.)

Signal Ranges

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 Set the threshold using the slide control or,

alternatively, move the white line directly in the graphic using

the mouse.

Sensitivity

Use this setting to adapt the sensitivity to the sound

environment and effectively suppress individual signal peaks. A

high value represents a high level of sensitivity.

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Bosch NTC-255-PI User Manual Page 74