I could have written this. My T has moved to another workplace and the office she has now thinner walls or something. Sometimes we could hear other people. Not what they say, but we can hear them talking. My T doesn't really know where it comes from, probably from the room above her? My T also doesn't like it.
There's also a T in the room next to hear, but so far I haven't heard talking from there. But when I'm sitting in the waiting room, I can hear voices from that T's room. I can make out about half of what they are saying.

But I really don't like it when I'm in session and I can hear talking from outside the room.

At the place where I see my pdoc, the office he has has also very thin walls. I can hear noise from the office next to him, which is also from a T. I've heard at several appointment a crying baby from there. Which is really annoying and distracting. In sessions with T is would be worse, I only see pdoc for meds, but still.