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Axis 214 PTZ - Network Camera Manual

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AXIS 214 PTZ
Advanced Audio Settings
The Advanced Audio settings allow you to tune the external microphone connected to the AXIS 214 PTZ’s
connection module to suit your environment.
Enable speech
filter improves the sound quality when the microphone is placed close to the person talking
and can also help reduce background noise. The filter cuts the lowest and the highest frequencies. The
bypass frequency range is approximately 250Hz to 3700Hz (measured at -10dB cut-off break points).
Enable echo cancellation reduces acoustic echoing
(feedback) if sound from the speaker is captured by the
microphone.
Noise cancellation is a way of reducing the background
noise when there is no useful audio present. A
typical application could be that the camera is set up in a noisy environment, and you are only interested in
hearing the sound from the AXIS 214 PTZ when someone is speaking close to the microphone. There are
two adjustable parameters available to optimize this function:
• Noise canceller threshold value
• Noise canceller attenuation
When the incoming sound is louder than the threshold, it
will pass without any changes. When lower than
the threshold, the incoming sound will be reduced by a certain attenuation factor. The threshold level
should be set higher than the background noise, but lower than the useful audio.
The nois
e canceller threshold value can be set to High, Medium High, Medium low and Low. A lower
threshold will allow most of the audio to pass. Only the weakest background noise will be reduced. A higher
threshold will make noise cancellation act on even louder background noise. At the maximum level High,
there is also a risk of reducing useful audio.
There is a trade-off between noise cancellation and sound quality. In
other words, increasing the noise
canceller attenuation deteriorates sound quality. Adjust the threshold and the attenuation to an optimum
by listening and changing the levels.
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