Dive Klaxon

How it's made

Source

a motor-driven diaphragm/reed produces a harmonic-rich 140–320 Hz buzz, not a pure tone. Band-limited saw and pulse components model the asymmetric reed motion; filtered noise adds rasp.

Body

a short metal horn reinforces broad bands near 0.9 and 1.8 kHz (Q 0.9–1.2), with a low diaphragm fundamental underneath. A 2.6–5.2 kHz low-pass bounds the abrasive upper harmonics.

Envelope

each 3 s cycle has a 0.82 s honk, a 0.22 s gap, then a lower 1.22 s honk and 0.74 s rest. Motor spin-up takes 75–110 ms; pitch overshoots then settles, with a 100–180 ms spin-down.

Modulation

23–36 Hz shallow amplitude flutter and 0.3 percent pitch wobble model reed chatter; the horn brightens with pressure and darkens during release. No room reverb is baked in.

Cleanup

two gentle 65 Hz high-passes remove subsonic diaphragm bias and motor flutter leakage.

Variation

seeded reed detuning stays within 0.2 percent; pitch, edge and chatter shape the mechanism. Presets cover a deep ship horn, cutting deck horn, twice-rate urgent cycle and worn diaphragm.

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