Last updated: September 2026 | Reviewed by: AppFixGuide Microsoft Teams Team | Read time: 8 minutes
Nothing derails a meeting faster than everyone typing “you’re on mute” in the chat while you’re clearly talking. A dead mic in Teams almost always comes down to one of a handful of very specific causes, and most of them take under a minute to fix once you know where to look.
Most Teams microphone problems are caused by the wrong input device being selected, the mic being muted at the hardware level (a physical switch or headset button), or blocked microphone permissions at the operating system level. Checking your device selection in Teams settings and confirming OS-level mic permissions fixes the vast majority of cases.
If you have a headset, a built-in laptop mic, and possibly a webcam with its own mic all connected at once, Teams may default to the wrong one. You could be speaking clearly into your headset while Teams is actually listening to your laptop’s built-in mic across the room.
Many headsets and USB microphones have a physical mute button or in-line switch. It’s easy to accidentally bump these, and because the mute happens before the signal ever reaches Teams, the app has no way to indicate what’s wrong — it just looks like silence.
Just like camera access, both Windows and macOS gate microphone access per-app. A blocked permission here means Teams shows your mic as “connected” in its settings while actually receiving no audio signal at all.
Windows has an “exclusive mode” setting for audio devices that lets one application take full, exclusive control of a microphone. If another app grabbed exclusive access first, Teams can be locked out even while showing the mic as available in its own device list.
USB headsets and standalone microphones sometimes need updated drivers or firmware, particularly after a Windows update. This shows up as intermittent cutting out rather than total silence.
Inspect your headset or microphone for a mute button, in-line switch, or LED indicator, and confirm it isn’t engaged. This takes ten seconds and resolves a surprising share of “broken mic” reports.
Click the three-dot menu in a call → Settings → Devices, and confirm the correct microphone is selected under “Microphone.” Speak and watch for the input level indicator to move — if it doesn’t move on any device, the issue is likely at the OS or hardware level rather than in Teams.
In Device Manager, expand “Audio inputs and outputs,” right-click your microphone, and select “Update driver” → “Search automatically for drivers.”
Teams has a built-in echo/test call feature accessible from Settings → Devices → “Make a test call.” This confirms whether the issue is fixed without needing to interrupt a real meeting.
This points to either an app-specific permission block (Step 3/4) or the wrong device being selected inside Teams specifically (Step 2), rather than a hardware fault.
Intermittent cutting out, rather than total silence, usually points to a driver issue (Step 6) or a wireless headset losing its Bluetooth connection due to range or interference.
It can, particularly if Teams cached an outdated device list after you plugged in a new microphone. It’s a reasonable quick step, but the checks above address the more common root causes directly.
This guide was compiled by the AppFixGuide Microsoft Teams team based on testing with built-in laptop microphones, USB headsets, and Bluetooth headsets on Windows 11 and macOS.