Once upon a time a GF had a crossed eyed Siamese that was patially deaf and spent many, many hours sitting and staring at one corner of the room, oblivious to everything going on around her...except to whatever ultrasonic signals the electic can opener transmitted.
Always wondered at the selective breeding that chose their voice as something beautiful and desirable with the dream of being surrounded by such unearthly noise.
Maybe the gene for the voice is passed on along with the genes for coloring, body shape, and other sought-after traits.