My ears have always been fixed. Never fallen off. But I could do with them sticking out a bit more, hearing is definitely improved if I cup and hold them forward towards a sound source. Often envied those old Victorians with their enormous ear trumpets.
I suppose I could force them forward a bit with chewing gum or something. 
Having collected many rescue dogs over the years I have a large pile of āElizabethanā collars meant to stop them scratching at a repaired bit of body. I once tried one myself and could hear perfectly, but got fed up with dogs keep coming up to chat. 