Before you join a meeting and are told that your voice cannot be heard, you can perform a short audio test in Windows ...
You're in a Skype or Zoom call, and you get told you can't be heard — or if you are coming through, it sounds like you're using a tin can on a string. It's something that happens to even professional ...
When someone says "I can't hear you" or "I hear an echo" after an online meeting has started, it wastes everyone's time.