i hear the sound of traffic outside my window. an engine reeves up, a bike passes, a horn honks in the night.
my cat sam doesn't hear any sounds at all. an occasional vibration will rouse him, but no sounds of cat food cans being opened or fresh turkey being unwrapped.
a plane passes overhead. i hear the huge engines. inside people are listening to music while a stewardess gives directions about flotation devices.
sound, one of the five senses we take for granted.