How To: Breaking the Fire Barrier

Overview

Objectives/Goals The objective of this study is to find out what range of frequencies paired with which decibel counts extinguish a fire of a given flame the fastest, and most efficiently. Methods/Materials Subwoofer, timer, ruler, frequency generator, and decibel meter. Measured the decibel output of the subwoofer, which was connected to the frequency generator, the flame height of the lighter, and timed how long it took to extinguish the flame. Results After different flame heights, frequencies, and decibel counts were tested, the results showed that 40 Hz worked the best followed by 35 Hz, 30 Hz, 25 Hz, then 20 Hz which didn't extinguish anything. These frequencies were most efficient paired with the higher experimented decibel count of 94.1 dB. The results were the same for a flame height of 1 cm and 2 cm. Conclusions/Discussion After the tests were completed, it was concluded that the best frequencies to use to extinguish a fire are between 30 and 40 Hz. It is also the most efficient to extinguish the fire from a distance of 1 cm or less with a high decibel count because the higher the decibel count, the faster the flame gets extinguished.​

Competition history

• CSEF 2017 Physics & Astronomy · Entry J1821

Resources

• CSEF project summary ↗

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