They Cannot Hear You on a Call: Microphone, Permissions, and Device Selection in Windows 11

Quick answer: Before reinstalling any drivers, check three places in this order: permissions in Windows (Privacy & security → Microphone, including the switch for desktop apps), device selection inside the app (Teams and Zoom have their own settings and do not necessarily follow the system default), and the microphone test under Settings → System → Sound. Nine out of ten “faulty microphones” turn out to be an issue in one of these places.

Permissions: the most common cause after an update

Microsoft explains this directly: if your microphone disappears after a Windows 11 update, your apps are probably missing the necessary permission. Go to Start → Settings → Privacy & security → Microphone. The following options must be enabled:

1. Microphone access — the main switch for the entire device.
2. Let apps access your microphone — followed by a list where you can grant access to individual apps.
3. Let desktop apps access your microphone — a separate switch at the very bottom.

The third option is easy to miss. Traditional desktop programs do not appear at all in the list of individual apps, and their microphone access cannot be disabled individually; they are controlled only by this shared switch. If you are looking for Zoom or another desktop app in the list and cannot find it, nothing is wrong — you simply need to scroll further down.

If you are using the microphone built into your webcam, also check Privacy & security → Camera. Its microphone may not be available unless camera access is enabled.

A practical tip from real calls: if Microsoft’s recommended switches are already enabled but the microphone still does not work, turn them off and back on. This forces Windows to apply the settings again.

The app selects its own device

Windows has one default input device, but communication apps have their own settings. Teams and Zoom remember their microphone and speaker selections separately and may still be trying to use a headset you disconnected last week. Before looking for a fault, open the app’s device settings and select the device that is actually connected. Both apps also offer a test call or microphone test.

Teams also has its own entry in Windows permissions. Microsoft provides a separate troubleshooting procedure: check that you are not muted using the button in the meeting, check the physical mute control on the headset (on many headsets, muting is linked to the boom position — raising it mutes the microphone), and only then move on to permissions and drivers.

One more issue delays countless calls: in a web browser, microphone permission is set separately for each domain. The web versions of Teams or Meet must request permission for that specific website, and a blocked permission remains blocked even after you restart the computer.

Test the microphone before reinstalling anything

In Windows → Settings → System → Sound, the Input section includes Choose a device for speaking or recording. Open the properties of the selected device and start the test under Test your microphone. Speak for a moment, stop the test, and play back the recorded sample. It takes half a minute and immediately divides the problem into two categories: either Windows cannot hear you (check the device, cable, permissions, and driver), or Windows can hear you but the app cannot (check the app’s settings).

You can also adjust the input volume in the same place — a quiet microphone is more often caused by a lowered slider than a hardware fault. Under Settings → System → Sound, the Advanced section also includes a troubleshooter for input devices.

Jack, USB, and Bluetooth: three different connections and three different problems

A combined 3.5 mm jack on a laptop uses a single socket for both headphones and a microphone. A headset with a four-pole plug is designed for this socket, while standard headphones with a three-pole plug carry audio only — there is simply no microphone connection. A studio microphone with its own jack plug will usually not work in a combined socket at all. If a dialog asking you to select the device type appears after you plug it in, choose the correct option; selecting the wrong one can effectively leave the microphone “disabled” for months.

A USB headset appears in Windows as a separate sound card. It therefore has its own input and output entries in the device list and does not share settings with the laptop’s Realtek or Intel Smart Sound card. If Windows does not detect it at all, try a different port and connect it directly without a hub — Microsoft recommends this as the first step for all USB peripherals.

Bluetooth is the most complex and most frequently misunderstood case. Classic Bluetooth audio uses two profiles: A2DP for stereo playback and hands-free, the only profile that supports the microphone but is limited to mono audio and a sampling rate of 8 or 16 kHz. Windows switches automatically as soon as an app requests access to the headset microphone. This is why music sounds narrow and muffled during a call, then returns to normal when the call ends — there is no point looking for a fault simply because “it sounds worse during calls.” If the quality does not return, an app or browser tab is still using the microphone in the background. For a more detailed explanation, including steps using Advanced sound properties, see Bluetooth headphones or mouse will not connect to Windows 11.

When the symptoms do not say what the cause is, the next step is measurement — fault diagnostics in Brno, not blind part swapping.

When Windows does not detect the microphone at all

Only at this point does it make sense to work with the drivers. Microsoft recommends opening Device Manager, expanding Sound, video and game controllers, uninstalling the audio device with Attempt to remove the driver for this device selected, restarting the computer, and allowing Windows to reinstall the driver. If it does not return automatically, use Action → Scan for hardware changes. Only after that should you try the laptop manufacturer’s driver.

If the speakers are silent as well and there is no sound anywhere, this is not just a microphone problem — start with sound not working in Windows 11, which covers output devices, the volume mixer, and the Windows Audio service.

One more point about the operating system: support for Windows 10 ended on October 14, 2025, so some audio driver problems on older computers will no longer be fixed. For a computer that cannot be upgraded to Windows 11, buying a headset with its own USB sound card may make more sense than spending another hour troubleshooting.

When it is a hardware problem

The computer should be taken in for repair if the input keeps disappearing even with a different microphone and port, if the laptop’s built-in microphone disappeared after a fall, liquid spill, or disassembly, if the jack crackles when the plug moves, or if the USB port repeatedly disconnects the device. The same applies if the audio device repeatedly disappears and reappears in Device Manager on its own.

Laptop microphones are often connected by a ribbon cable routed into the display lid alongside the camera, so failures are frequently related to the hinge or previous disassembly. We can confirm the diagnosis and price only after inspecting the specific device. You can arrange an appointment through the booking form or by calling 774 777 774. In the description, specify whether the problem affects the built-in microphone, a jack-connected device, or a USB headset, and whether the microphone test in Windows settings recorded anything.

Order online: Fault diagnostics — tell us the model and what happens, and we will come back with the next step.

Sources

• Microsoft: Fix microphone problems
• Microsoft: Turn on app permissions for your microphone in Windows
• Microsoft: Windows camera, microphone, and privacy
• Microsoft: My microphone is not working in Microsoft Teams
• Microsoft: Fix sound or audio problems in Windows
• Microsoft Learn: Bluetooth Classic audio