1. Use a (analog) headset instead of built in computer microphone.
  2. Reduce ambient noise such as nearby speakers or fans.
  3. Adjust the distance of the microphone from the mouth – too close can cause audio clipping.
  4. Adjust microphone levels in the computer’s sound settings.
  5. Clear browser cache
  6. Ensure computer has resources available to process a call:

    • CPU and RAM are not overutilized
    • Close unnecessary applications and browser tabs
    • Try disabling the antivirus software

For more information about improving call quality, please refer to this article.