Axis Communications AXIS 233D - Manual (Page 25)

25 AXIS 233D - Audio
Advanced Audio
Advanced audio settings can improve audio quality by speech filtering and echo and noise
cancellation.
When enabled the speech filter reduces noise by filtering out all the frequencies below
100HZ and above 3500 Hz. This improves the sound quality if a person is close to the
microphone when talking and will reduce background noises.
Enable echo cancellation to reduce acoustic echoing that can be caused by audio coming
from a speaker being captured by a microphone.
Noise cancelling is a way of reducing the background noise if the microphone, for
example, is set up in a noisy environment and you are only interested in hearing a person
who is talking close to the microphone. The noise canceller attenuation produces
maximum noise reduction when set to 18dB of attenuation. Optimize the sound quality by
listening to the sound and adjusting the attenuation level as required.