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Repetitions and continuity in calls

  • On December 6, 2020
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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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 […]
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Echo Cancellation with Flash – A Case Study

  • On December 12, 2016
Background From time to time we are getting requests to improve audio quality in flash calls and mainly to help remove echo. In a previous post, Echo Cancellation with Flash Clients, we discussed few techniques that could be helpful. In this post we show a case study for integrating a centralized audio filtering to improve […]
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Echo cancellation for browser-based Flash/Silverlight chat applications

  • On November 20, 2016
Browser-based chat applications Several of the vendors that develop audio/video chat applications decide to do it using Flash or Silverlight technology due to the following two advantages: 1.       The end-users do not need to install any additional software, except for the necessary plug-ins on their existing browser. 2.       The end-users can run the application on […]
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Audio Quality When Using Speakerphone During Phone Calls

  • On November 20, 2016
  Background There are different scenarios in which calls are made using speakerphones. For example: In manufacturing floor where the employees want to have an open communication channel without the limitation of headset or handset. When using intercom devices. When more than one person needs to listen to the call (e.g. in conference rooms). When […]
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Acoustic Echo Cancellation and Sound Cards

  • On November 20, 2016
Clock Synchronization Acoustic Echo Cancellation (AEC) is a method of removing the echo from the audio signal captured by the microphone. This is done by using the audio that is played to the speakers as a reference audio signal. Most AEC algorithms require that both audio signals, i.e. the signal captured from the microphone and […]
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Improving Audio Quality with Analog Telephone Adapter (ATA)

  • On November 20, 2016
Background One of the first steps SMBs take towards VoIP is to add ATA to their existing analog telephone network. There are many well known brands of ATAs in the market today like Linksys PAP2, Cisco PAP2T, Grandstream HandyTone and others. Regularly we are requested to improve audio quality in such telephony systems – especially […]
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Echo Cancellation with Flash Clients

  • On November 20, 2016
Background In the beginning of this year, Adobe has released an acoustic echo cancellation as an integral part of its platform. Based on the feedback we are getting, the problem of echo was successfully reduced but not in all environments and especially not in environments that include mobile platforms.  SoliCall’s network echo cancellation technology could […]
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Intercoms and Acoustic Echo Cancellation

  • On November 19, 2016
Background 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:
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Tips for Installing PBXMate in a Distributed VoIP Network

  • On November 19, 2016
Background Many VoIP network administrator face a common problem that their users complain about the quality of their phone calls. The most common complains are about noise, echo and other artifacts. If the network is distributed, it becomes very difficult to analyze and control the multiple components in the network starting from the end devices […]
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