June 15, 1955, El Paso Times About 5000 El Pasoans In 1000 motor vehicles fled into the desert today in a mass evacuation after sirens sounded a make-believe enemy air raid.

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 ...

First installed in the 1950s, they were developed for Cold War air raid warnings, but in the 1970s, the sirens transitioned to outdoor warning alerts.

It had the up-and-down pitch of an air raid or an attack siren," added Behnke. That's exactly the tone Winnebago County Emergency Management officials say rang out from the sirens in Oshkosh.

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.

This air raid siren might have been set off by a Russian MiG fighter jet taking off from Belarus. The White House has said, though, that Russia was informed about this visit beforehand.

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 ...

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.