The microphone and voice chat are enabled by default when playing Party Animals. To see how you can disable both of these communication features, you can take a look at this tutorial from Seeking Tech.
Method #1
For the first method, you can take the following steps:
1. Head over to the Settings menu from either the main menu or in-game menu.
2. From there, you can head over to the Sound tab and then move the cursor down to Listening Scope.
3. Set the Listening Scope to Nobody so that you won’t hear other players chatting on their microphone.
4. Next, move the cursor down to Microphone.
5. Make sure that the Microphone setting is set to Off so that other players won’t be able to hear you talking.
9. Apply your changes.
Method #2
You can also mute the mic and voice chat from the in-game menu by doing the following:
1. During gameplay, open the menu. If you are using an Xbox controller, then you need to press the View button.
2. From the menu, you should see a button layout for menu navigating in the bottom as well as the Microphone and Listening Scope settings on the button left.
If you are using an Xbox gamepad, then you can change the Microphone setting with the LB button and the Listening Scope setting with the RB button.
Make sure that Microphone is set to Off and Listening Scope is set to Nobody.