Blowtorch

How it's made

Source

a continuously burning pressurized gas jet; white turbulence fills 450 Hz–10 kHz, with a stronger broad 1.4–4.5 kHz shear-layer hiss and pink combustion noise at 90–900 Hz.

Body

a broad nozzle band at 0.9–2.3 kHz reinforces the jet; a weak wandering fundamental and 2.03-ratio overtone model the tonal edge without turning the flame into a whistle.

Envelope

steady 8 s sustain without ignition or shutdown. Pressure wanders by 5 percent; irregular 9–24 targets/s flutter and shallow 13–22 Hz modulation disturb the flame front.

Modulation

slow pressure drift moves the hiss band by 7 percent and nozzle tone by 1.2 percent; higher pressure raises bandwidth and strengthens the combustion body. No discrete crackles.

Variation

independent seeded streams drive each noise layer, pressure and flutter; nozzle tuning varies by 1 percent per seed. Presets cover pencil, cutting, broad and low-pressure jets.

Space

dry mono point source. A 65 Hz high-pass removes handling rumble; a 10.5 kHz low-pass softens the upper hiss. The engine crossfades the loop boundary into subsequent jet noise.

The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.