The Chrysler Air Raid Siren was a hulking beast that was 12-feet long, six-feet high, and weighed somewhere around 6,000 pounds. Inside the siren was a 1952 180-hp V8 Chrysler HEMI engine capable ...

Some people hear an air raid siren, and assume there must be an historical war re-enactment taking place nearby. I am the third type of person, who hears a 3D-printed air raid siren and ...

By ramping the speed of the motor up and down, it’s possible to vary the pitch of the siren as is often done with real air raid sirens. This action could be entirely automated if so desired.

"I could tell right away that the sirens didn't sound like the normal tornado siren. It had the up-and-down pitch of an air raid or an attack siren," added Behnke. That's exactly the tone ...

The civil defence directorate tested an air raid siren installed atop the multistorey PWD building in ITO for 10 to 15 minutes. Many in the neighbourhood said they had heard it for the first time.