Quick answer
Bluetooth headsets often switch to Hands-Free (HFP) mode during video calls, which degrades audio quality or cuts it off completely. The fix is to select the correct microphone and speaker in the app, disable the Hands-Free device in Windows (if using the computer's microphone), or select stereo output in the app, and check that the headset is connected to only one device.
How to recognize the problem
- Audio in the headset cuts out or disappears completely when you join a call
- Others cannot hear you even though the headset is connected
- Audio quality suddenly degrades (sounds like a phone call) during the call
- The headset microphone does not appear in the device list in the app
- Sound plays through the computer speakers instead of the headset
Most common causes
Automatic switch to Hands-Free profile
When an app opens the microphone, Windows and macOS switch the Bluetooth headset from the playback profile (A2DP) to the Hands-Free profile (HFP), which has lower audio quality and often temporarily interrupts audio.
Wrong device selected in the app
Zoom, Teams or Meet may use the computer's default microphone or speaker instead of the headset, so sound comes out in the wrong place or not at all.
Headset connected to multiple devices at once
If the headset is connected to both a phone and a computer, a call on the phone can take over the audio and interrupt sound on the computer.
Low battery or weak signal
Low battery level or distance from the computer causes dropouts and the headset turning off mid-call.
Outdated driver or Bluetooth stack
Sometimes Windows or macOS do not correctly recognize the headset profile, so the headset appears as two separate devices (Stereo and Hands-Free) and confuses the app.
Step-by-step fix
- 1
Check device selection in the app
In Zoom, click the arrow next to the microphone and speaker and select your Bluetooth headset, not "Same as System" or the computer's built-in microphone and speakers. In Teams, go to
Settings > Devicesand select the headset for microphone and speaker. In Google Meet, click the three dots >Settings > Audioand select the appropriate devices. - 2
Disable the Hands-Free device in Windows
Open
Settings > System > Soundand open additional sound settings (orControl Panel > Hardware and Sound > Sound). In thePlaybacktab, find the entry containing "Hands-Free" or "Headset" and disable it (right-click >Disable). Do the same in theRecordingtab for the Hands-Free microphone. Leave only the "Stereo" device enabled for playback. If you need the headset microphone, skip disabling the entry in theRecordingtab, but then playback quality during calls will be lower. This prevents automatic switching to the lower-quality profile. - 3
Turn off Bluetooth audio during the call (Windows)
During the call, click the speaker icon in the system tray, then the arrow for output selection and select your headset under "Stereo" or "Headphones", not under "Hands-Free". If the app offers a separate setting for Bluetooth audio, turn it off.
- 4
Connect the headset to only one device
Turn off Bluetooth on your phone or tablet while the call is on the computer. If the headset has a multipoint connection feature, temporarily disable it in the manufacturer's companion app, if that option is available.
- 5
Reset the Bluetooth connection
Remove the headset from the list of paired devices in
Settings > Bluetooth & devices, turn Bluetooth off and on, then pair the headset again. On macOS, go toSystem Settings > Bluetooth, remove the headset withForget This Deviceand pair it again. - 6
Update drivers and firmware
In Windows, open
Device Manager, find the Bluetooth adapter, right-click >Update driver. Also check if the headset manufacturer offers a firmware update through their app. On macOS, updates come throughSystem Settings > General > Software Update. - 7
Test the microphone before a call
In Windows, go to
Settings > System > Sound > Inputand check the input signal level while speaking. In Zoom, useTest Speaker & Microphonebefore the meeting. If the level is not stable and you use a USB Bluetooth adapter, try another USB port or another adapter. - 8
Use a wired connection or USB receiver
If Bluetooth is still unstable, connect the headset with a cable (if it has one) or use a USB receiver (dongle) that comes with some models. This bypasses the computer's built-in Bluetooth, which may be weaker.
If nothing helps: advanced checks
Check whether the problem occurs in all apps or only one. If only one, note important settings before resetting, then reset it to default settings or reinstall. In Windows, run services.msc and check if the Bluetooth Support Service is running. On macOS, open Audio MIDI Setup (in Applications > Utilities) and check if the headset is shown with the correct number of channels. If you have multiple Bluetooth devices, turn off all except the headset. For business users, consider wired USB headsets with a microphone, which are more reliable than Bluetooth in shared offices.
How to prevent it
- Before every call, check the microphone and speaker selection in the app.
- Keep the headset charged and close to the computer (within 1 m).
- Turn off Bluetooth on your phone when not using it for a call.
- Regularly update the headset firmware and Bluetooth adapter drivers.
When to call a professional
If you have tried all the steps and the problem persists across multiple devices or apps, contact IT support. They can check system logs, replace the Bluetooth adapter or test the headset on another computer.
IT infrastructure maintenance · Servers, networks, backup, security and helpdeskFAQ
Why does the sound in Bluetooth headphones get worse when I turn on the microphone?
This is normal Bluetooth profile behavior: when an app requests the microphone, the headset switches from the stereo profile (A2DP) to the Hands-Free profile (HFP), which has a narrower bandwidth and lower quality. The solution is to disable the Hands-Free device or use a wired microphone.
How do I know if the headset is connected to the computer or the phone?
In Windows, go to `Settings > Bluetooth & devices` and check the headset status. On the phone, turn off Bluetooth or forget the device. If the headset has an LED indicator, the color or blinking may indicate an active call.
Can I use a Bluetooth headset for Zoom and Teams at the same time?
Technically yes, but if both apps use the Bluetooth microphone at the same time, there may be a conflict and audio loss. Close the app that is not in use or select a different microphone in one of them.