If it's a Bluetooth microphone or headset, it's worth unpairing and re-pairing it with your Windows 11 PC. To do this, navigate to Settings > Bluetooth & devices > Devices, click the three-dot ...

Windows 11/10 allows PC users to listen to a portable music player or other device connected to the microphone jack through a selected playback device such as your computer speakers or headphone.

Everyone should know which apps and programs on their PC are using these services and for how much time. Windows 11 has that ... of Location and Microphone services and turn off the access.