Noise cancelling headsets for call centers, what’s next?

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On October 7, 2018
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call center noise, noise reduction headsets

Noise removal in a call center environment is a challenging task. As opposed to non-human ambient noise like street noise and car horn, the background noise in call centers is actually human voices of people talking in the background. When performing noise removal in a contact center environment the challenge is to identify which of […]

Acoustic Echo Cancellation Vs. Acoustic Echo Suppression

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On September 2, 2018
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echo cancellation, echo suppression

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 […]

Cancel noise in cloud-based call centers

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On August 1, 2018
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call center noise cancellation, call center noise reduction, cloud-based call centers, cloud-based contact centers

Virtualization and cloud computing were the triggers for the emerging market of cloud-based call centers. We see more and more vendors offering cloud-based contact center software. If you are looking for a proof that this is no longer a small niche, just take a look at the efforts that Amazon is investing in its new […]

Noise cancellation for at-home agents

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On May 27, 2018
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at-home agents, Noise Cancellation, noise in home office

In today’s world, an increasing number of employees are working from their home-office. Few of the advantages of this work model are: reducing cost on infrastructure and shared work spaces, minimizing geographic limitations and saving commute time. There are many organizations that appreciate the advantages of such work model and encourage it. Following are few […]

How to evaluate an echo cancellation algorithm?

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On November 21, 2017
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Acoustic Echo Cancellation, echo cancellation

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 […]

Noise map for call centers

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On September 4, 2017
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call center noise cancellation, call center noise reduction, noise map

Background Call centers suffers from significant ambient noise that is originated from multiple locations like: Other agents talking in the background. The supervisor/team-leaders shouting to instruct or enthuse the agents. A nearby gathering in the coffee corner. Such noise reduces the quality of the calls and directly impacts customer satisfaction. In addition the existence of […]

Echo Cancellation with negative echo tail

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On May 7, 2017
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Acoustic Echo Cancellation, echo tail

Background Echo path/tail is one of the most fundamental parameters when performing echo cancellation. In previous posts, we elaborated on the importance of echo tail and we also provided a Do It Yourself (DIY) method to calculate the echo tail. In most usage scenarios, the value of the echo tail will be a positive one […]

Noise reduction algorithms – PNR vs. RNR

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On January 3, 2017
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Noise Cancellation, noise reduction software

Background Recently SoliCall introduced the reference-based noise reduction (RNR). This new technology was added to our noise reduction portfolio which already contained profile-based noise reduction (PNR) and standard noise reduction. Following the RNR introduction, we got requests to elaborate on the difference between PNR and RNR as they both use a profile/learning mechanism. In this […]

Analyze the echo path yourself

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On September 4, 2016
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echo path, echo tail

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 […]

Time manipulation and its impact on echo cancellation

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On July 1, 2016
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echo cancellation, time manipulation, WSOLA

Background Time manipulation is a known technique in audio processing. It can be used to either compress the audio (resulting in speed-up) or expand the audio (resulting in slow-down). Usually this is done without altering the pitch and therefore without changing the fundamental signature of the voice.

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