Help - Why can I hear myself

Purchased a new headset and now whenever I start up TS I can hear myself even if PTT is on. Scoured the internet for fixes and nothing is working. Used teamspeak for over 6 years now and never had any problems like this before :frowning:

Hi, first of all do you hear yourself in Windows? you can check this by opening the sound settings → choosing your microphone and “use this device as a playback source” in the second tab, is this active?