Sound extinguisher developed by American students. Video

Two American engineering students built a fire extinguisher capable of extinguishing a flame using sound: low frequencies separate fuel from oxygen. About the device tells The Washington Post.

The students of George Mason University designed the device with their own money (about 600 dollars). It consists of the actual fire extinguisher and a backpack with batteries. At first, students experimented with large speakers and high frequencies, but in the end, the bass showed the best result: the frequency in 30-60 hertz.

The pressure wave from the sound “excites” the air, which makes it possible to effectively separate oxygen from the fuel. In particular, the acoustic field increases the speed of air movement around the flame. The higher this speed, the thinner the boundary layer of the flame becomes, and it becomes easier to interrupt the combustion process.