Inhibiting combustion via infrasound: details of Sonic Fire Tech's sonic solution for fire suppression.

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A new system created by the American company Sonic Fire Tech, founded by former NASA engineers, proposes an entirely different way to fight fires: using sound waves so low that we don't even perceive them to "smother" the fire.

In practice, sensors identify the start of the flames and emit infrasonic vibrations—that is, frequencies below 20 Hz—that agitate the oxygen molecules around the flame, preventing the chemical reaction of combustion from continuing its course.

One of the great advantages of this system is that it eliminates the need for water, chemicals, or foam, which minimizes damage to the burning structure or the environment.

The company has already raised approximately US$3.5 million in investments and plans to install initial versions of this system — including for residences and to support firefighters — by mid-2026.

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Sonic Fire Tech, composed of former NASA acoustic engineers, has developed a fire suppression system based on infrasonic waves (< 20 Hz) that aim to interrupt the combustion reaction through molecular agitation of oxygen around the flame.

The underlying physical principle considers that to maintain an active flame, three conditions are necessary: ​​a fuel, heat, and oxygen. The system acts on the last element, causing vibration in oxygen molecules at a frequency high enough that combustion cannot utilize them, interrupting the exothermic cycle.

In addition, the system presents specific advantages in cases of fires involving lithium batteries, where traditional methods with water can be counterproductive — in this context, acoustic suppression reduces the spread of the flame without the risk of adverse chemical reaction.

Technical language: (News produced with AI)

Sources: Startup cria sistema que usa som para apagar incêndios - portal waffle Ex-engenheiros da NASA desenvolvem ferramenta sônica que "sufoca" o fogo: a ciência por trás da tecnologia que apaga chamas com som

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