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DC offset and Audio Filtering

  • On April 10, 2024
In this post we describe a phenomena called “DC offset” in audio signal and its impact on the quality of audio filtering like noise reduction, echo cancellation and automatic gain control. We say that a signal has a DC offset distortion when the mean amplitude of its waveform is not zero. A normal voice waveform […]
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SoliCall Connect Vs. SoliCall Pro

  • On January 31, 2024
We are frequently asked by call centers and enterprises to help them understand the difference between SoliCall Connect and SoliCall Pro. In this post, we will cover these two products and highlight the key differences. What is common? Both these products are software-based products that aim to improve audio quality in telephony. SoliCall Pro is […]
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Analyze the echo path yourself

  • On October 27, 2023
Background The echo path is one of the most critical component during echo cancellation.  You might have already heard this term or any of its synonyms (e.g. “echo tail”). When discussing the echo path we usually talk about two different aspects: a. The stability of the echo path. How volatile is this parameter ? Is […]
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Noise Cancellation vs. Echo Cancellation

  • On July 10, 2023
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 […]
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Echo Cancellation, Art or Science?

  • On July 9, 2023
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 […]
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Noise cancelling app cancels what?

  • On July 5, 2023
We are frequency approached by new prospects with a simple request: could you help us cancel the noise in our audio? In order to address this question professionally, we first we need to understand what exactly stands behind the general word “noise” in the prospect’s request. Apparently there are many types of noise in audio […]
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Repetitions and continuity in calls

  • On July 5, 2023
Unnecessary repetitions…repetitions…repetitions are disturbing and break the continuity of the call. When people have a discussion while they are physically close to each other, you hardly experience repetitions. But nowadays due to Covid-19 and social distancing many interactions happen via phone/video calls. In these calls repetitions are very common and they break continuity and significantly […]
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AI, Can you identify echo?

  • On July 5, 2023
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 […]
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4 ways to improve online teaching

  • On July 5, 2023
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 […]
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Reverberation and Echo Cancellation

  • On July 5, 2023
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 […]
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