Push to Talk for Voice Chat allows you to require a button press to activate your microphone. Open Mic is the default Voice Chat setting.
To enable Push to Talk:
- Launch Rocket League
- Select Settings from the Main Menu
- Select the Chat tab
- Check the Push to Talk button
After enabling Push to Talk, you can change the binding for the Push to Talk button in the Controls tab:
- Select Settings from the Main Menu
- Select the Controls tab
- Select View/Change Bindings
- Scroll down and Select Voice Chat (Push to Talk)
- Press any button to bind your Push to Talk button
For more info, check out: How Do I Use Voice Chat in Rocket League?