Axis Communications user manual Axis 243SA Audio

AXIS 243SA - Audio 27

The noise canceller threshold value can be set to High, Medium High, Medium low and Low. A lower threshold allows most of the audio to pass. Only the weakest background noise is reduced. A higher threshold makes the noise canceller act on even stronger background noise. At the maximum level High, there is a risk of reducing useful audio as well.

There is a trade-off between noise cancelling and sound quality. In other words, increasing the noise canceller attenuation deteriorates sound quality. Adjust the threshold and the attenuation to an optimum level by listening and changing the levels.