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Low-frequency bass speaker that extinguishes flames.
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Previously:
1841 candle extinguisher - GIF
Alligator shears cutting a fire extinguisher - GIF
Automatic gas station fire extinguishers - video
Barbecue grill from fire extinguisher - video
Fire extinguisher guide - infographic
Sorry that didn't sound like low frequency to me. That speaker is about a 10"-12" and the length of the cylinder is maybe 12"-!4" (based on his shoes size) which would be a λ = 1.1253 ft. with the speed of sound in air (343m/s), and frequency at 1Khz. But that screech had pulses and harmonics and felt much higher that 1KHz.
AI Overview
No, 1 kHz (1000 Hz) is not typically considered a low frequency; it falls within the mid-range frequency spectrum, often associated with the clarity of speech and musical instruments. Low frequencies in sound are generally considered to be below 200 Hz or 300 Hz, while 1 kHz is closer to the higher end of the midrange and the start of the high-mid frequency range
No doubt a system like this could put out a small flame/fire but this is not as advertised IMHO.