
How old is your friends dog? Has she been checked by the Vet to be sure that she has nothing physically wrong? This would be my first port of call followed by the breeder & then possibly, on Vet & breeder advice a kind behaviourist to come in (www.apbc.co.uk I think?)
Has your friend spoken to her dogs breeder? They should be able to offer some good help & advice.
It does sound like your friends dog has extra sensitive hearing as one of its problems ~ one of mine is like this & I swear can hear a knat fart a mile away :-D