If you hear audio echo or audio feedback during your meeting, there are three possible causes:

• A participant has both the computer and telephone audio active.
• Participants have computer or telephones speakers that are too close to each other.
• Multiple computers with active audio are in the same conference room.

The source of echo can also be from speakers (such as TV or soundbar) that are too loud, failed echo cancellation (device or performance issue), or a bad microphone. Generally, if you are hearing echo, it means that there is a device that is channeling your audio back.

To isolate the attendee:

• Host can mute the attendee one at a time.
• Host can mute all, and unmute one at a time.
• Attendee can mute themselves.

This article covers:

• Case 1: Both the computer and telephone audio are active
• Case 2: Computer or telephones speakers are too close to each other
• Case 3: Multiple computers with active audio are in the same conference room

Prerequisites for managing the audio echo in a meeting

• Zoom desktop client
  • Windows: 5.2.1 or higher
  • macOS: 5.2.1 or higher
  • Linux: 5.2.1 or higher
• Zoom mobile app
  • Android: 5.2.1 or higher
  • iOS: 5.2.1 or higher

Case 1: Both the computer and telephone audio are active

If you join from a computer and call in from the telephone, ensure that you follow the steps below: 

1. On your phone, dial the teleconferencing number provided in your meeting invite.
2. Enter your participant ID followed by #when calling in to a meeting or webinar.
3. (Optional) Enter your #participant ID# when you're already in the call.
4. (Optional) Manually leave computer audio on your computer.

Case 2: Computer or telephones speakers are too close to each other

If another participant is too close to you and both of you have speakers on, leave audio conference on one of the computers or hang up the the telephone connections.

Case 3: Multiple computers with active audio are in the same conference room

If you are in a conference room with multiple devices, disconnect computer audio from the other devices. For more information about disconnecting computer audio from computers, see Joining a meeting or webinar by phone.

Note: Muting is not enough as you mute the mic, but the speaker is still on.

To disconnect computer audio from the mobile (Android and iOS) devices:

1. Sign in to the Zoom mobile app.
2. Join a meeting.
3. In your meeting controls, select More .
4. Click Disconnect Audio.