Echo Cancellation, Art or Science?

On December 5, 2022

Echo Cancellation is one of the most critical component that is required in order to be able and have a full-duplex phone communication. Echo Cancellation is not a “nice to have” component and trying to make a phone call without it can become a quality nightmare. In this post, we will summarize the different functionalities […]

Noise Cancellation vs. Echo Cancellation

On December 5, 2022

Echo Cancellation is the process of cancelling echo that bounce back from the loudspeakers to the microphone. The main purpose of echo cancellation is to prevent the speaker from hearing himself/herself echoing back in a delay. Noise Cancellation is the process of removing from the captures signal background noise. Although the goal of both these […]

Reverberation and Echo Cancellation

On August 2, 2022

Reverberation, in audio processing, is an on-going echo after a sound is produced. To illustrate this phenomena let’s think of a simple scenario in which you call a friend that is using laptop without headsets. In this case your voice will be played by the speakers of the laptop and from the speakers your voice […]

4 ways to improve online teaching

On January 4, 2022

Online teaching is on the rise for many years and COVID has given it an extra boost in the last two years. The driving force behind this phenomena is very simple: the increase in the quality, robustness and availability of internet connectivity voids the limitations previously imposed by geographic distances. The physical distance between the […]

On December 4, 2021

Background [EDITED] The following blog post provides an overview on all major components that are required when building/designing an echo cancellation software. In this post we will discuss a common implementation issue we have seen many times – audio stream synchronization.

AI, Can you identify echo?

On March 15, 2021

Acoustic Echo in phone calls is caused when audio that is being played on the loudspeakers is then picked up by the microphone and afterwards transmitted to the far-end person who is talking. As a result the far-end talking person will hear himself/herself in a delay. When echo appears in a phone call it is […]

Echo and noise in Kiosks and Vending Machines

On April 23, 2019

Kiosks and vending machines are perhaps the most widely used devices that can be found almost in any public area. Their main purpose is to provide a wide spread service in almost any public location. These devices are very common and their number is not very different from the size of the human population. For […]

Noise during online courses

On November 22, 2018

The number of online courses has been increasing over the last years. Education institutes, including the most respectable universities, offer e-learning for an increasing share of their courses. Online training is also widely used by internal education centers in many organizations. Although e-learning is widely used world-wide, there are areas in which it is the […]

Acoustic Echo Cancellation Vs. Acoustic Echo Suppression

On September 2, 2018

Echo is a known problem in telephony and when it appears it dramatically reduces the quality of the audio. In some cases the echo can even turn out to howling effect that generates a deafening noise. To familiarize yourself with the basic terms that relates to echo cancellation, you are invited to read our blog-series […]

How to evaluate an echo cancellation algorithm?

On March 25, 2018

When you encounter an echo problem in your application, network or devices it is obvious you need to introduce an echo canceller. Your next step is to explore at least two possible locations for performing the echo cancellation: cancelling the echo on the client side or doing it on the server side. The decision […]

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