The most common reasons your microphone isn't working are: the mic is muted (check your keyboard mute key or headset switch), the wrong input device is selected in your OS or app, or your browser or app doesn't have microphone permission. Start by opening your system sound settings and confirming the correct mic is selected and the input level moves when you speak. Then check browser permissions — click the padlock icon in the address bar and make sure Microphone is set to Allow. If you're using a USB or Bluetooth mic, unplug and reconnect it, then reload the page. On Windows, also check Settings > Privacy & Security > Microphone to ensure app access is enabled. On Mac, check System Settings > Privacy & Security > Microphone.
Quick Checklist: Fix Your Mic in 60 Seconds
Before diving into advanced troubleshooting, run through these fast checks. Most mic problems are solved by one of these steps alone.
- Check the physical mute button on your headset, keyboard, or mic — many have a hardware mute switch or key (often F4 or a dedicated button) that silently disables the mic.
- Unplug and replug USB mics, or disconnect and reconnect Bluetooth headsets. This forces your OS to re-detect the device.
- Close other apps using the mic (Zoom, Teams, Discord, OBS, screen recorders). Most mics can only be used by one app at a time.
- Restart your browser or app after changing any permission settings — permission changes don't take effect until the app reloads.
- Try a different USB port. Front-panel ports on desktops are sometimes disconnected internally.
Fix Microphone Not Working on Windows
Windows 11 and Windows 10 have a layered permission system for microphones. Your mic needs to pass through three gates: the OS privacy setting, the app-level permission, and the correct device selection.
- Settings > Privacy & Security > Microphone: Toggle "Microphone access" ON, then scroll down and make sure the specific app (Chrome, Edge, Teams, Zoom) is also toggled on.
- Settings > System > Sound > Input: Select the correct microphone from the dropdown. Avoid "Default" if you have multiple mics — pick by name.
- Raise the Input volume slider to at least 80% and speak — the input level meter should move.
- Right-click the speaker icon in the taskbar > Sound settings > More sound settings > Recording tab: Right-click your mic > Properties > Advanced > uncheck "Allow applications to take exclusive control of this device" if apps keep stealing the mic.
- Device Manager > Audio inputs and outputs: If your mic has a yellow warning icon, right-click > Update driver or Uninstall device, then restart.
Fix Microphone Not Working on Mac
macOS controls mic access through System Settings privacy controls and per-app permissions. Each app needs explicit permission, and some don't prompt for it automatically.
- System Settings > Privacy & Security > Microphone: Toggle ON for Safari, Chrome, Edge, Zoom, Teams, and any other app that needs mic access.
- System Settings > Sound > Input: Select the correct mic and raise the input volume. The input level indicator should bounce when you speak.
- If the mic stays silent in all apps, open Terminal and run: sudo killall coreaudiod — this restarts macOS's audio subsystem and often fixes stuck mics.
- For Safari: Settings > Websites > Microphone > set specific sites to Allow so the permission isn't asked every visit.
- For Bluetooth headsets: Forget the device in System Settings > Bluetooth, then pair again. Bluetooth mics sometimes get stuck in the wrong audio profile.
Fix Microphone Not Working in Chrome, Edge, or Firefox
Browser-based mic issues are usually a blocked permission or the wrong device selected in the browser's settings. This is the #1 issue for web-based meeting tools and online mic tests.
- Click the padlock (or tune) icon in the address bar > set Microphone to Allow, then reload the page.
- Chrome: Go to chrome://settings/content/microphone — select your mic from the dropdown and check that the site isn't in the Blocked list.
- Firefox: Settings > Privacy & Security > Permissions > Microphone > check that the site is listed as Allowed.
- Edge: Settings > Cookies and site permissions > Microphone > select your device and check the Allow/Block lists.
- Try an incognito/private window to rule out extension conflicts — privacy extensions (uBlock Origin, Privacy Badger) sometimes block mic access silently.
Microphone Not Working on iPhone or Android
Mobile mic issues are less common but can be tricky because the settings are buried. On phones, app permissions and Do Not Disturb mode are the usual culprits.
- iPhone: Settings > Privacy & Security > Microphone: toggle ON for the app that can't hear you. Also check Settings > [App Name] for mic permission.
- Android: Settings > Apps > [App Name] > Permissions > Microphone: set to Allow. Exact path varies by manufacturer.
- Clean the mic opening with a soft brush — dirt, lint, and pocket debris are the #1 physical cause of muffled or dead mics on phones.
- Check Do Not Disturb and Focus modes — some configurations mute the mic for certain apps.
- Restart the phone if the mic stopped working suddenly — this clears audio service crashes that are common after OS updates.
When the Mic Works in Some Apps but Not Others
This is the most frustrating scenario: your mic works in one app but stays silent in another. It almost always means the non-working app has the wrong mic selected or doesn't have permission.
- Each app has its OWN mic setting, separate from the OS default. Open the broken app's audio/device settings and re-select the mic by name.
- Meeting apps (Zoom, Teams, Meet) need to be restarted after you change OS permissions — they don't pick up permission changes live.
- Some apps grab "exclusive control" of the mic, locking out everything else. Check Windows Sound settings > Recording > Properties > Advanced > uncheck exclusive control.
- If the mic works in a browser mic test but not in a desktop app, the issue is the app's own permissions or settings, not the mic hardware.