Favourite siren?

I start, Klaxon CS8 Secomak
lovely distinct hi lo escape tone.

 

It all depends on what its for.
What ever Chicago uses

And the Thunderbolt 1000T

 

nice! Do you like the old mechanical carters?

 

Tornado or emergency vehicle?

 

I like the old Mechanical ones since there more reliable and louder than most new electronic ones.
The only thing that beats the mechanical ones is when they have a yearly test for those nuclear power plant sirens.

 

and then you find yourself in a 1950s america, a news broadcast comes on and says some nukes have dropped and you make a run to the nearest Vault-Tec vault.

 

Both if you want.