Chapter 14. Recommendations On Setting And Operation Of Ds03M(P); Acoustic Echo Cancellation - Beward DS03M Operation User's Manual

Chapter 14. Recommendations on Setting and Operation of DS03M(P)

IP intercom systems unite different types and configurations of equipment (PCs, laptops,
microphones, speakers, etc.). Consequently, correct operation of the whole system depends on
proper setting of each used device taking into account the peculiarities of their joint operation.

14.1. Acoustic Echo Cancellation

Using the door station the Client or the Guest may hear an echo feedback from their PC
speakers or the door station speaker accordingly.
The echo feedback on the Guest side (door station speaker) depends on settings of audio
output equipment of Client's PC as well as on audio settings in the operating system on Client's PC.
The echo feedback on the Client side (PC speakers) depends on the door station settings.
The echo feedback may occur when one or more of the following conditions are taken place:

Microphone Boost level is too high;

The speakers are too close to the microphone;

The speaker volume is turned up so as the microphone hears the speakers;

The microphone is very sensitive.
The most efficient method to remove the echo feedback effect on the Client side is use of
headphones or a hands-free unit by the Client for a conversation with the Guest. If this is impossible
according to some reasons, follow the recommendations below.
There are two main ways of reducing the echo feedback effect: change of audio settings in
the operating system and change of audio settings of the door station.
1. To reduce the echo feedback effect on the Guest side (door station speaker) by changing
settings of the operating system do as follows:

go to Control Panel – Sound – Recording, double-click the recording device set by
default (microphone) and ensure that the "Listen to this device" option is disabled on the
Listen tab.

go to Control Panel – Sound – Playback, double-click the playback device set by default
and ensure that the "Microphone" option is disabled on the Levels tab (button
It is also possible to reduce the echo feedback effect by selecting the Enhancements tab on
the microphone's properties page and enabling one of the following options:

Enable Noise Suppression

Enable Acoustic Echo Cancellation
NOTE!
These settings are audio hardware and software specific and may not be available for all microphones.
IP Video Door Station DS03M(P) Operation User Manual
Chapter 14. Recommendations on Setting and Operation of DS03M(P)
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