Managing sound and video settings during Teams meetings and calls for optimal communication
Seems this problem of intermittent double tone during a teams call has been reported with multiple headsets over several years. I have not changed my setup at all and experienced it for the first time today.
SOLUTION: It seems this is resulting from a double mute... Teams is muted and the headset is muted. I resolved easily by depressing both the + & - buttons on my headset simultaneously to take off the headset mute. By repeating the process I can bring the problem back. I think it is a "feature" from aftershocks to remind you that you are muted.
Enjoy!