Teams Echo in Calls

Audio echo in Teams meetings is extremely disruptive, creating a delayed repetition of your own voice or overlapping audio feedback. Echo happens when your microphone picks up sound from your speakers and re-transmits it. This guide helps you identify the source and eliminate the echo for all participants.

Step 1: Identify the Source of the Echo

The person hearing the echo is not the one causing it. The echo originates from another participant’s setup where the microphone is picking up speaker output.

1. Ask participants to mute one at a time to identify who is causing the echo.
2. When the echo stops after a specific person mutes, that person’s audio setup is the source.
3. Common echo scenarios:
   • Laptop speakers + built-in microphone: The mic picks up audio from the speakers.
   • Multiple devices in the same room: Two people joined from the same room on separate devices, creating a feedback loop.
   • External speakers placed near the microphone: Desktop speaker setups where the mic is positioned close to the speaker output.
   • Phone and computer joined simultaneously: If you joined via dial-in phone AND the Teams app, your audio is being transmitted twice.

• If you are the one hearing the echo, the problem is on someone else’s device. Politely ask them to follow the steps below.

Step 2: Use a Headset Instead of Speakers

The most reliable way to eliminate echo is to use headphones or a headset, which prevents the microphone from picking up speaker output.

1. Connect a wired headset with an integrated microphone (most reliable) or a Bluetooth headset.
2. In Teams, go to Settings > Devices and select the headset for both Speaker and Microphone.
3. Click Make a test call to verify the echo is gone.

Recommended headset types for echo-free calls:

• USB headsets with built-in echo cancellation (Jabra, Poly, Plantronics)

• Wired earbuds with inline microphone

• Over-ear headphones with boom microphone

• If a headset is not available, earbuds (even simple wired ones) are significantly better than laptop speakers for preventing echo.

• Avoid using the speaker on your phone in the same room as your computer’s Teams session.

Step 3: Adjust Microphone and Speaker Settings

If you must use speakers, adjusting volume levels and microphone sensitivity can reduce echo.

1. Lower your speaker volume to reduce the sound reaching your microphone. Even a 20-30% reduction can eliminate echo.
2. In Teams Settings > Devices, adjust the microphone sensitivity slider if available.
3. On your operating system, reduce the microphone input level:

On Windows:

1. Right-click the speaker icon in the system tray > Sound settings.
2. Under Input, click your microphone > Properties.
3. Reduce the Input volume to 60-70%.
4. Under Enhancements or Advanced, enable Echo cancellation and Noise suppression if available.

On macOS:

1. Open System Settings > Sound > Input.
2. Select your microphone and reduce the Input volume slider.
3. macOS handles echo cancellation at the system level for built-in microphones.

• Position your microphone away from and facing away from your speakers when possible.
• Avoid sitting in small, hard-walled rooms where sound bounces create natural reverb.

Step 4: Fix Room-Based Echo in Conference Rooms

Conference rooms introduce unique echo challenges due to room acoustics and shared speakerphones.

1. One device per room: Only one device should have audio enabled. All other participants in the room should join the meeting with audio off (mute mic and speakers) or use the Companion mode in Teams.

2. If using a conference room speakerphone (Poly, Jabra, Yealink):

   • Ensure it is selected as the audio device in Teams.
   • Position it centrally on the table, away from walls and hard surfaces.
   • Verify its firmware is updated — echo cancellation algorithms improve with updates.

3. For Teams Rooms systems:

   • Check that the room system software is up to date.
   • Go to Settings > Audio and verify echo cancellation is enabled.

4. If echo persists in a conference room:

   • Add soft materials (tablecloths, acoustic panels) to reduce sound reflection.
   • Close the door to prevent hallway noise from entering the room.
   • Reduce the speakerphone volume — conference speakers are often set too loud by default.

Step 5: Enable Noise Suppression and Advanced Audio

Teams includes built-in audio processing features that can help reduce echo and background noise.

1. Open Teams Settings > Devices (or Settings > Noise suppression in some versions).
2. Set Noise suppression to High. This aggressively filters background sounds, including some echo artifacts.
3. In the new Teams client, look for Music mode — make sure this is off for normal calls, as it disables echo cancellation to preserve audio fidelity for music.

Additional tips:

• If you are the meeting organizer, you can mute all participants and ask them to unmute only when speaking. This prevents idle microphones from contributing echo.
• Use the Mute button proactively when you are not speaking — this is the simplest echo prevention.
• Check if any participant has joined the meeting on multiple devices (e.g., phone and laptop both connected). They should leave the meeting on one device.

# macOS: Check for multiple audio output devices that might cause routing issues
system_profiler SPAudioDataType

• If echo occurs only with specific participants, ask them to test their setup at https://aka.ms/teamscallingtest — this is the built-in Teams test call feature that helps diagnose audio issues.