Courtyard Fountain

How it's made

Source

a jet of water falling a short height onto the surface of a stone basin. Thousands of small impacts merge into a continuous broadband hiss (pink noise, roughly 500 Hz–8 kHz) whose level breathes slowly (0.15–0.3 Hz drift) because the jet wobbles and the falling sheet thickens and thins.

Events

entrained air bubbles ring at the Minnaert frequency f0 ≈ 3.26 / r (0.8–5 mm gives 0.65–4 kHz) and chirp upward as they rise; 25–150 per second, small ones far more frequent than large ones.

Body

the basin water churns below the impact point: slow, low-passed brown noise (≈ 60–400 Hz) with a soft cavity resonance around 140–230 Hz where the water column is excited by the falling mass.

Stone

the splash reaches the basin rim and the courtyard walls; this adds 4–14 ms comb reflections to the bright layer and a faint, heavily damped stone mode set excited by the splash, never ringing for long.

Envelope

steady-state loop; flow scales bed level, bubble rate and brightness together, while every channel gets its own noise and drift so the image stays wide and non-repeating.

Variation

`rng` draws each bubble's radius, rise, level and pan; presets change the flow and the balance between spray, bubbles, churn and stone.

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