Using Sound as a Fire Extinguisher
A video on YouTube. In Science & Engineering, a Krater category.
Watch on YouTubeSummary by Krater
The creator tests whether a large speaker can put out a fire using sound waves, comparing its effectiveness against a standard fan and exploring the science of acoustic flame extinction.
From the video
Answers: Can a large speaker put out a fire using sound waves?
- Acoustic fire suppression
- Speaker bass reflex ports
- Air vortex cannons
- Sound waves vs flames
- Oxygen depletion in fires
What it concludes
- A speaker at 70 Hz can extinguish a small flame when directed at it.
- A speaker reflex port produces coherent air movement in a smaller area, making it more effective at blowing out flames than direct speaker cones.
- Attaching an air vortex cannon to a speaker port focuses air and makes it easier to put out fires from a distance.
- A standard box fan blows much more total air over a larger area but fails to extinguish flames as effectively as focused acoustic or vortex air movement.
- Blowing on larger fires usually increases flame size by supplying oxygen, whereas sound waves disrupt natural convection and starve the flame of oxygen.
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