Hi Dennis,
You can create Wwise events to pause and resume any sound. In the event editor, just select "pause" instead of "stop" and "resume" instead of "play". Just trigger these events as per normal in UE4. You may select the scope as global (for all game objects) or to be specific to the object you're referencing. You can also "pause all" and "resume all", which if done globally would be useful for pausing the game when the player brings up the menu, etc. There are many different actions you can do in a Wwise event. Check them out :)