This siren was used by most sheriff departments in the 1950's to the 1960's and was featured in many movies, including Pixar's CARS and the Dukes of Hazzard.
Siren sample created by Vincent Berkan on YouTube.
Thanks to @B727ClassicFlyer for requesting this awesome siren in light of the new Bluebuck!
Demo of the siren:
P.S. I experience that pesky Doppler effect glitch too, so those little hiccups of the siren in the video are not a part of the siren but are my game being spoopy