How to Fix Mic Echo and Feedback in Calls and Recordings

"Can you hear me?" — pause — "...hear me hear me hear me." Mic echo is jarring on calls, makes recordings sound amateur, and ruins game audio for your teammates. The good news: there are only two real causes, and once you know which one you have, the fix takes minutes.

The Two Types of Echo

Type A — Loopback echo: your speakers play the other person's voice, your mic picks it up, and sends it back to them. They hear themselves repeated. Common on speakerphone calls.

Type B — Room echo (reverb): your voice bounces off walls before reaching the mic. Sounds "boomy" or "in a tunnel". Common in tile bathrooms, empty rooms with hardwood floors, and rooms with parallel walls.

The fix is different for each. Identify which one first.

Quick Diagnosis

Open the KeyTest mic tester and use the Record tab. Record yourself saying "test, test, one two three". Play it back through headphones (not speakers, or you'll loop). If the playback sounds boomy or hollow, you have room echo. If the recording is clean but the echo only appears on calls, it's loopback echo.

Fix Loopback Echo

Wear headphones. Yes, that's it for 95% of cases. The other 5%:

• Use a headset: combined mic + headphones means the mic never hears the speaker output. The simplest, cleanest fix.
• Enable echo cancellation in the app: Discord → Voice & Video → Echo Cancellation On. Zoom enables it by default. Teams enables AEC under Devices.
• Move the mic away from speakers: at least 50 cm. Bookshelf speakers near a desk mic are a classic loopback source.
• Lower speaker volume: even with AEC enabled, very loud playback overwhelms the algorithm and a faint echo leaks through.

Microsoft documents Teams' echo cancellation in their audio quality docs — it works best when the mic and speakers don't move during the call.

Fix Room Echo (Reverb)

You can't software-cancel room reverb effectively because the reflections arrive milliseconds after the direct sound — the algorithm can't distinguish them. The fix is acoustic, not electronic.

1. Move closer to the mic. Going from 40 cm to 15 cm makes the direct signal 8 dB louder than reflections, dramatically improving clarity.
2. Choose a cardioid mic. It rejects sound from behind, halving the reflections it picks up.
3. Soft surfaces around the mic. A blanket draped behind the mic, a bookshelf, a couch — any soft mass that absorbs reflections.
4. Acoustic foam panels on the closest reflective walls. Sound on Sound's small-room treatment guide shows where to put them.
5. Avoid empty hard rooms. Rugs, curtains, furniture all help.

Feedback (the Squeal)

Different from echo. Feedback is when the mic picks up its own amplified output and creates a runaway loop, producing a piercing squeal. Fix: lower the speaker volume, mute the mic in the playback monitor, and never enable "Listen to this device" in Sound settings unless you're using headphones.

App-Specific Echo Settings

• Discord: User Settings → Voice & Video → enable Echo Cancellation, Noise Suppression, and Advanced Voice Activity. Krisp adds higher-quality echo cancellation on top.
• Zoom: Audio → Suppress background noise → Auto. Echo cancellation is on by default and can't be disabled — that's by design.
• Teams: Devices → Noise suppression → Auto. Microsoft's machine-learning model handles both echo and noise.
• OBS / streaming: AEC isn't built in. Add the Noise Suppression filter and use a directional mic; if recording game audio, route via VoiceMeeter to keep mic and game on separate tracks.

When Echo Won't Go Away

If you've added headphones, enabled AEC, and treated the room and the echo persists, check whether "Listen to this device" is enabled in Windows Sound → Recording → Microphone Properties → Listen tab. This setting outputs your own mic to your speakers, guaranteed loopback. Disable it.

For chronic call echo from one specific contact, the issue is their setup, not yours — you can't fix their feedback by muting yourself. Ask them to put on headphones.

Frequently Asked Questions