Thank you both for your reply. It occurs whenever I'm in telecoil mode and in a hearing loop setting. If I turn on the telecoil mode where there isnt a hearing loop I don't get the same clicking sound. And it more often seems to be the clicking sound. And that includes when use my portable PLA90 hearing loop device. I'm not in a hearing loop setting except on Sunday's at church for the most part. Or the few times I might take my PLA90 to some event. I had a PLA 90 at work so it was something that happened more often but I retired several months ago. I'm familiar with the electro-magnetic interference than can occur in a building or loop, but this is different. I have my annual appt in a couple of weeks and will have to bring it up again and ask if they could even let me talk to the Unitron rep myself to explain it so they hear it from the horses mouth and not filtered in whatever way might happen otherwise. I also need to ask if they have the device to adjust telecoils to one's hearing loss. Or even just ask what kind of adjustments do telecoils need to see what response I might receive. Appreciate your comments.