From Wired: “BitBoost’s PawSense is a background application that can tell the difference between cat walking and human typing.” I played the “Sound that Annoys Cats” from their web site and my cat promptly came running in from the other room and jumped onto my chair. Luckily “PawSense also provides you the option of recording and using the sounds that you find are most appropriate for your individual cat.” (emphasis theirs).