I would totally tell the T.

I usually have my sessions at night but a few times, I've seen current T during the day.

I've heard the Ts on either side as well as their clients talking and laughing, loudly.

Also, just random noise.

It's driven me absolutely nuts -- I don't know about you but even the slightest noise when I'm in certain emotional states, drives me to really serious rage (like I can't think any more).

So, I told current T about it -- she didn't fully get it but enough to know that it bothered me.

She also has a buzzer for clients to get rung in after hours. At my night sessions, she's sometimes had a client after me.

The buzzer ringing suddenly has me shutting down completely and then I feel really unstable.

So, I've told her that she needs to let me know if there'll be a client ringing the buzzer after me, in which case, I'll watch the clock and end the session before time so that I can avoid the sudden, jarring intrusion.

We haven't put that into practice as yet because after I told her that, she hasn't had a client come in at that hour but I guess it'll happen soon enough.