I remember vividly one installation of a loop system where we were involved.
The oldest lady in the congregation in Kilsyth was invited to come with her hearing aid to test out how effective it was. She switched over to the ‘T’ position, and when the Minister spoke into the microphone, she literally jumped out of her seat! This was worrying as she had had a heart attack recently, and she was hurriedly encouraged to sit down!
Luckily she survived the experience and was eventually able to describe the new hearing experience as… ’it was just like the Minister sitting on my shoulder talking into my ear!
I never asked the Minister what he thought of that!