Revolutionizing Wildfire Defense: How Inaudible Sound Could Be the Game-Changer We Need

A decade ago, two college students created a unique fire extinguisher using a 10-inch subwoofer. It was a hit online, even making it to “The Tonight Show” with Jimmy Fallon. Since then, though, the technology has faded from view.

This isn’t the first time the idea has been explored. The Pentagon’s DARPA was looking into it as early as 2012. A glance at scientific literature shows that many researchers are still interested in using sound to fight fires.

Now, a startup named Sonic Fire Tech claims to have made significant strides. They developed a system that not only puts out fires but may also shield buildings from wildfires. Recently, they raised $3.5 million from investors, including Khosla Ventures and Third Sphere.

Wildfires bring huge costs—up to $424 billion yearly in the U.S. Places like California face severe challenges, with some insurers even refusing to renew home policies due to repeated fires.

The concept started with Michael Thomas, Sonic Fire Tech’s board chairman. He contacted Geoff Bruder, a former NASA engineer specialized in heat and acoustics, to help develop a prototype. Bruder crafted an initial version using components from local hardware stores. Their first test extinguished a fire from seven feet away.

Sonic Fire Tech has since moved away from using subwoofers, opting instead for low-frequency sound. Bruder explains that audible frequencies can harm hearing, so the product now employs infrasound—sounds below the human hearing range, around 20 Hz. This change allows for safer and more effective fire suppression.

Bruder claims their current system can suppress flames from 25 feet, with plans for larger models to reach up to 330 feet. They intend to offer the system for about 2% of a home’s value and are in talks with insurance companies for certification.

The fire suppression system operates with rigid ducts placed strategically on rooftops. It activates when sensors detect fire, using infrasound to disrupt combustion. This setup requires about 500 watts of electricity, and in the event of a power outage, backup plans include lead-acid batteries. Unlike traditional sprinkler systems, it doesn’t need water, which is a significant advantage in areas prone to wildfires.

Sonic Fire Tech isn’t just developing new technology; they’re collaborating with local utility companies like PG&E and Southern California Edison to test their systems on real homes. Bruder envisions becoming a recognized alternative to sprinkler systems, making fire safety more accessible for homeowners.

With wildfires becoming more common and costly, innovations like these could be key in protecting lives and properties.

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