Intercoms and Acoustic Echo Cancellation
- On November 19, 2016
One of the disturbing problems that appears when using intercoms, or other low-end full-duplex communication devices, is the generated echo. Usually the echo is significant in these situations due to the following two reasons:
1. The intercom is equipped with an amplifier on its speakers that makes sure the voice is heard even in a noisy environment. The down-side of this amplified is that it significantly increases the echo that is picked up by the microphone.
2. The intercom is usually a low-end device that has limited CPU and it is unable to do prover echo cancellation. Some intercoms do echo suppression but this method reduces the quality of the call by turning it to be half-duplex.
Centralized Echo Cancellation
The solution to this problem is to use a professional echo cancellation in the network that is capable of doing far-end echo cancellation on behalf of the intercom devices. A high quality centralized echo canceller should be easily capable of handling the long delay (echo tail) that exists in such environments.
PBXMate is a software product that is designed to do centralized acoustic echo cancellation. In addition, the PBXMate has many more features like:
2. Adjust call volume – for example amplify a low speech volume.
3. Real-time monitoring of call’s quality.
The PBXMate is designed to be easily integrated in any SIP network. Most modern communication networks have support for SIP. So, even if the intercom device and all other end-devices are analogue, the call can be easily converted to SIP via most modern PBX systems.