Your title really caught my eye ! Perhaps as a hearing aid (occasional as possible) user I can help. Hearing Aids have microphones in various places some at the top just poking cheekily behind the ear, some underneath the aid some people have remote attachments so may wear theirs on their chest! However one thing which all hearing aid microphones do as soon as you cover them is feedback, or whistle- thereby rendering the aid useless and the wearer red faced (if they can hear it - I can't -blissfully) You can use an aid with an inductive coupler in something like a telephone but again itakes some skill to ensure there is no feedback, from a personal point, and I would stress that this is personal and may not apply to others, I find that the nearer the sound is to my ear the more chance I have of hearing clearly and am able to hear on a telephone or through 'cans' without my hearing aid. I'm sorry I don't know what the answer is but my advice would be to trial any suggestions with a friendly hearing aid user. Hope this is helpful Chris Baxter The Nottingham Trent University %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%