Managing sound and video settings during Teams meetings and calls for optimal communication
I have the JBL 450BT and encountered the same issue as the original poster, thankfully though i believe i have over come it by altering some settings.
Via the Control Panel locate your headphones.
Right click on them and select Sound Settings
Then within the Playback tab, make sure the headphone is selected as the screen shot below
Then select the Recordings tab and within the tab make sure Internal Microphone is selected.
Once you have done this, select Apply and then Ok
Hopefully, by doing that you should be able to make a call, via Teams without the other person or persons, sounding like robots.