Overview and Fix
No sounds from Logitech 960 headphones in Teams but can hear Windows sounds.
- Right click the speaker icon on your task bar and goto playback devices.
- click your usb headset then click Properties.
- click the Levels tab.
- Where it say Headset Earphone click Balance.
- take #1 slidebar all the way left.
- take #2 slidebar all the way right.
Test - this should fix the issue.
Source: Logitech Usb Headset - Sounds like garbage - Page 2 - Windows 7 Forums (sevenforums.com)