Has anyone come across a circuit design for an amplified neckloop. There are plenty of large scale schematics for room or even desk loops. But I would like a better quality amplified neckloop with which to listen to audiobooks on my smartphone - I have an unamplified neckloop and it’s not too bad but being able to clean up and amplify the input signal would be very useful. I’d have thought that with the micro-circuits around these days, it ought not to be too hard (and I do have experience with building basic circuits) but I can’t find a schematic/parts list.
Can I digress (kind of) by saying that I’ve seen very small, very cheap amplified neckloops on the Internet being sold by small Chinese companies as part of a “spy listening” secret service type of setup where you can put a tiny T-coil mike in your ear and listen to stuff coming over your phone, But as soon as something becomes a “medical” or “health” item it jumps in price by 400 - 500%. It irritates hell out of me being ripped off.
Regards and thanks for any help you can offer.