I've never had a dog, but I had a cockatiel for 17 years, and his thing was sirens, and the "chung chung" noise on the Law and Order TV show.
Years ago when I'd watch General Hospital, Alex would start to scream at the top of his lungs at the beginning of the show when the ambulance pulls into the gates.
Anytime that Law and Order was on in more recent years, he'd scream in response to that chung noise.
Anytime a firetruck or police car went past within earshot with their sirens going, he would scream and scream and scream until he couldn't hear the siren anymore.
We always said he should have been born a dalmation, then he could have ridden on the firetrucks.
I miss the little screamer...RIP Alex