耳が早い
みみがはやい being quick-eared having sharp ears

耳が肥えている
みみがこえている to have an ear for music

耳が肥ている
みみがこえている to have an ear for music

耳が速い
みみがはやい being quick-eared having sharp ears

耳が遠い
みみがとおい poor hearing