"Loop system"

I had an appointment which went well but I have to wear two hearing aids and without the use of the ‘loop system’ I struggled with communication as the doctor was wearing a mask. I could make out some bits about a camera and the procedure, but I struggled and wasn’t sure what he was saying. I believe they are sending a letter to my doctor but I am not sure why, waiting to see what happens next. I couldn’t see any information about a loop system either and although the appointment went well, I think it may be useful to have some signage for the loop system as it makes a big difference.