Horns go 'wee oo', right?
I like to imagine police officers speeding down the interstate after stolen U-Hauls screaming "WEE-OO" out the window. It's funnier than the reality.
I think it would make all of our lives just a little bit better. ;D
Horns go "stabby", sirens go "wee oo"... Mythological sirens sound nice. That's what I know.