I work as an interpreter for a US company, and today I received a call from my supervisor. She mentioned that she could hear me – between calls – discussing things with somebody and advised against having anyone in my office lol It's true that they can monitor my calls, but I'm curious if it's legal for them to listen to me after the call ends. It feels super weird. I likely signed various documents during the hiring process, but what about when the calls ends? I have no means of knowing if someone is listening to my calls, which is fine due to quality assurance, but I can’t even know if they can hear me once the calls have ended. I live in Minnesota.