I've been in contact with the UK distributors of a product which might be of interest to some of you. Aftershockz have produced what are known as bone conducting headphones. They were developed for use in military theatres where soldiers need to be aware of what's going on around them as well as being able to listen to a radio message. so the speakers sit not on or in the ear, but on the bone in front of it. I should have a pair for review by tomorrow and am looking forward to trying them.