Geyser Eruption

How it's made

Source

geothermal pressure drives turbulent water and steam; independent pink and white noise beds model the dense water jet and the finer steam shear, with no pitched oscillator or baked-in reverb.

Body

a broad 70-260 Hz vent rumble supports a 220-2400 Hz moving water roar; steam spans 1.5-9 kHz. Broad filters (Q below 1) avoid a fixed pipe whistle. High-pass filtering removes subsonic pressure.

Envelope

0.7-1.8 s of rising rumble and gurgle precede a 150 ms jet opening; the column holds to 3 s, collapses by 4.8 s, and leaves falling spray to 5.85 s. The final 150 ms are silent.

Events

10-45 large bubbles/s (5-15 mm) build then yield to irregular 12-60 ms splash grains and smaller entrained bubbles. Falling grains spread across stereo and diminish before the final fade.

Modulation

independent random pressure wander at 2-9 Hz changes jet level and spectral opening; steam follows the opening with a short lag, and falling water outlasts the pressure source.

Variation

seed changes bubble radii, splash colour, timing and pan. Controls set vent size, pressure, steam balance, falling spray and buildup time; presets emphasize tall, steamy, boiling or broad jets.

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