Bottle Blow Tone

How it's made

Source

a turbulent air jet crossing a bottle lip; filtered pink and white noise begins before locking.

Body

a Helmholtz air-cavity mode, f = c/(2*pi)*sqrt(A/(V*L)), represented by a driven sine and noise resonance at 150-540 Hz. Weak second/third partials model nonlinear jet coupling, not a struck wall.

Layers

narrow cavity turbulence follows the fundamental; broad 650-4200 Hz lip air stays underneath.

Envelope

air rises in 65 ms; the tone locks over 90-320 ms, holds with pressure swells, then softens. Tone releases before the last wispy air; default audible duration is 2.4 s with a 100 ms silent guard.

Modulation

pressure shifts pitch by less than 2 percent; seeded wander and faint 4.7 Hz flutter avoid a static oscillator. Upper partials and air bandwidth decrease as the breath expires.

Variation

pitch models cavity volume; air controls leakage, steadiness controls pressure stability, and length controls breath duration. Presets cover a low jug, small bottle, airy lip and steady soft blow.

Space

dry, centred mono close perspective; no room tail or glass impact is added.

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