Audio “Echo” is caused by your mic picking up sound that is coming from your speakers. Your speaker sound is taken in by your microphone, fed back out your speakers, which in turn is picked up by your mic to be played through your speakers again. This creates an infinite loop which produces the “Echo” that can shout over anyone talking during your meeting.
The best defense against audio echo is a good head set. If you don’t have a headset, try to place your speakers away from your mic and turn down your speaker volume.
It’s also important to remember that while each participant may enter the meeting with their mic muted, you unmute your mic as soon as you talk. Remind your participants to mute again when done speaking.
BTW – if everyone but you can hear the echo, check your set up. The echo just might be coming from you.
SOMEONE is creating an echo - but who?
Look for unmuted microphones. In your list of Participants each person displays a set of icons to the right of their name. If their microphone icon has a slash, this means that this participant has muted their microphone. If no slash, the microphone is unmuted. If you are a presenter and have an attendee who may have briefly stepped away from the meeting without muting their mic, you can test by right-clicking the participant’s name and selecting Mute from the short-cut menu.