Loud tone during sessions while on Safari

While on my macbook pro, I get a loud shrill tone during Zoom sessions.  It only seems to happen while I am using Safari rather than Chrome.  I had my computer checked out by Apple and there is nothing wrong with it.  I made a   video while it happened but I can't attach it to this forum.  The sound can be made quieter if I adjust the volume but I need my volume on so I can hear the people in my meeting.  

Has anyone seen this before and is it a Zoom /Safari problem?  How can I fix it?