Although it was written in 2002, I think it's quite relevant to today, as well as it is a really interesting read of what he went thru wearing digital hearing aids and because of his acoustic programming experiences over the years; and dealing with dispensers, he wrote this wonderful article, which I think that every HOH/deaf users and HA dispensers SHOULD read.

http://www.hearnet.com/features/arti...clerickl.shtml