Advanced Audio Settings - Bosch LHN-UC15L-SIP User Manual

30 en | Web-GUI configuration
4.5.2

Advanced audio settings

Advanced audio settings, when active, allow the user to set parameters for noise gate, speaker
equalization, ANC (automatic volume control) and to configure sine wave generator for
measurement testing.
To display the advanced audio settings, enable Advanced mode on Maintenance, page 37 .
Noise gate page
Use the Noise gate page to configure the point at which noise suppression activates.
This means you can:
–
–
–
–
–
Set these parameters by entering values in the specific fields or by using the + or - to increase
or decrease the values.
Speaker equalizer page
The Speaker equalizer page allows you to configure the Type, Gain, Frequency, Quality, and
Bypass of the output from the IP Horn loudspeaker or the IP Amplifier module.
Use the 6-band PEQ (parametric equalizer) to set parameters by entering values in the specific
fields, using the + or - to increase or decrease the values, or by moving a point in the plot
graph.
A Reset to default button, located at the top of the page resets the values to the default
settings.
Alternatively, it is possible to pick from a set of factory presets made especially for the IP Horn
loudspeakers.
ANC page (IP Horn loudspeaker only)
Use the Ambient Noise Control (ANC) page to configure when using an automatic adaption of
the volume depending of background noise. The integrated microphone measures the audio
level. You can set a threshold that automatically adjusts the volume of the device depending
on the amount of ambient noise.
This means you can:
–
–
–
–
Set these parameters by entering values in the specific fields or by using the + or - to increase
or decrease the values.
When the sine generator is activated, the value Calculated gain (dB) indicates the current
volume adaption.
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2023.02 | V01 | F.01U.389.835
configure the audio level of activation (Threshold)
configure the speed at which the device gets to the activation threshold (Attack)
configure how long suppression is active (Hold) after the threshold met
configure the speed at which the gain transitions to silence during release (Release)
configure the depth of the audio when noise gate is active (Depth)
configure the audio level at which adjustments start (Threshold),
configure the amount of time, in milliseconds, to evaluate a noise before triggering the
adjustment (RMS time)
configure ratio of adjustment increases (Ratio)
configure the maximum level of gain in adjustments (Gain max)
Practical example: Starting at a noise of -40 dBFS, the adaption shall raise the volume
equally to the noise getting louder, not more than 20 dB.
– Set Threshold to -40 dBFS.
– Keep Ratio at 1.0.
– Set Gain max (dB) to 20.
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