Cop car sirens

Cop cars have to be the most annoying sound in the world. I remember when a simple siren would suffice, well it seems those days are over. Anymore you'll hear what sounds like a reggae perfomer on heroin. You have all kinds of squeaks and squaks, then it sounds like damned machine gun fire. What is wrong with the old classic sirens? Perhaps cops decided, "Well the sound of our cars is just so annoying that perhaps crime will decrease in an attempt to avoid hearing this most irritating sound". I think criminals in jail should be forced to listen to the sirens for like 2hrs straight a day. Now that would either correct their problems...or you know...make them psychotic, either way. As long as somebody has a little fun I suppose.