Adelheid, his aids probably just need to be readjusted. It sometimes takes some tweaking to get the sound right (and it should be part of the initial cost). And as she pointed out, many non-surgical hearing aids have bluetooth or other ways to hook up to phones, etc.

And as Brianana pointed out, the aid in the article is a bone-conduction aid, only used for people who have chronic or congenital problems with the middle ear. The vast majority of people with hearing loss have trouble with the *inner* ear, and the bone-anchored aid won't work for them at all. The original article says this, but the synopsis here gives an inaccurate impression.