When using Teams, you may encounter volume issues, there are a couple of settings to check to get this solved.
Check that you have the right output device selected in Teams by going to settings> Devices
If the selected device is the right one you may want to check the Windows sound settings:
Settings> System> Sound
Make sure that the Output device matches the one in Teams:
If the last settings are correct, you may have Teams muted.
Open the volume mixer and set Team volume to 100% as well make sure that there is not an X in the Sound Icon:
Settings> System> Sound> Volume Mixer