My husband has it - acute sensitivity to some noises - mainly the choruses of neighbours' dogs two kilometres away on a hill to the north of us and another to the east. If it weren't for fences no doubt the dogs would be either fighting or forming a pack. Sound carries far in rural areas. Ari does have acute hearing - perhaps because his sight has always been poor. He's pitch-perfect, adores music, and has a great ear for languages. The downside is that he becomes irate at any noise that he thinks shouldn't be.
