[NightHawkInLight] a.k.a. [Ben] recently built an awesome high power air cannon out of PVC pipe. PVC air cannons are great, and everyone should build one of these at some point in their life ...

Using an air vortex cannon to focus the sound waves from the bass reflex port, it ‘wiggles’ the flame out in a matter of seconds, as illustrated with a thermal camera. Compared to the much ...

BELGRADE – Serbia politicians and the police on March 19 again denied they had deployed a “sound cannon” against protesters over the weekend during a massive anti-corruption rally in the ...

Two days later, however, opposition lawmaker Marinika Tepic released a document indicating that the Interior Ministry had indeed procured two types of sound cannons. She also published a photo ...

Serbian authorities deny they used sound cannon — a.k.a. sonic weapons ... The Nazi Luftwaffe (air force) equipped its dive bombers with ram-air sirens that produced a loud wailing noise ...