One of the first questions everyone shouts when they first log on to the meeting is “Can you hear me” followed with a round of “Yes” or “You’re still on mute” (See point 3) and then they tick the box on their bingo sheet.
The solution is to do a double check before you log on to the meeting when you are in the waiting room.
Click on Test Computer Audio this then gives you a screen where you can test what you can hear by clicking on the test speaker button and see if you can hear the ringing noise and then the test microphone button where you can speak some words and then the computer plays it back to you.
If you can hear the noise and your own voice you are good to join the meeting, though you may still need to unmute yourself when you arrive.