Youtuber Mark Makies has created a 3D printer air raid siren. This you probably know, if you viewed the video above (via Hackaday). What I'm not entirely sure of is why it sounds like both a ...

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.

In total, Chrysler's books claim that 350 Chrysler Air Raid Sirens were produced. Cities where the Chrysler Air Raid Siren was installed include Los Angeles, Chicago, New York, and Miami.

Air Raid Siren: How This Technology Works The technology is expected to be used for the India’s mock drill siren remains unclear. However, globally, air raid sirens operate using various ...

GREG MYRE, BYLINE: The air raid sirens warning of a Russian assault can go off any time or any place in Ukraine. One recently began to wail as a 28-year-old singer, Diana Oganesyan, was walking ...

I am the third type of person, who hears a 3D-printed air raid siren and experiences a flash forward to my apocalyptic future yet to come. Bear with me here folks, I'm cooking.