Helicopter Hover

An overhead helicopter holding position, with weighty blade chop, turbulent rotor wash and turbine whine.

loop · 4.00 s · 0 downloads · 0 likes

0.00 / 4.00 sMP3 preview · Distant patrol

Preset

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Free for commercial use. No attribution needed.

Tweak

renders in the CLI · WAV

Change parameters to build an exact command. Your agent runs it with sb and gets the WAV.

Command

$ sb get FK27PE8EFP@1 --preset distant-patrol -o helicopter-hover.wav

Source: main-rotor loading produces 12-26 blade passes/s, with a smooth bipolar pressure pulse and a 15-35 ms turbulent swish per pass; alternate blades have slightly unequal loading.
Body: rotor harmonics occupy 28-1400 Hz; broad turbulence and a short 650 Hz slap add blade definition. The pressure pulse is a finite harmonic sum, not a discontinuous waveform or impact click.
Layers: a quieter tail rotor modulates 700-2600 Hz air at 5.5 times the main blade-pass rate; two weak turbine shaft tones near 1.4-3.8 kHz sit inside a broad engine-noise band.
Envelope: sustained hover, with 0.25/0.5 Hz loading corrections and smooth cyclic blade envelopes. Blade rates snap to whole-Hz steps; all rotor phases and corrections close across the 4 s loop.
Movement: shared periodic phase warping gives small speed fluctuations without a flyby pitch sweep. Distance removes upper harmonics and turbine detail; the low rotor remains almost mono.
Variation: seeded blade phases and independent air streams; presets cover heavy lift, light utility, distant patrol and close overhead. No baked reverb; loop crossfading joins stochastic air.

Parameters
Parameter	Range	Default	Unit	Controls
bladeRate	12 – 26	14	Hz	Blade-pass rate
weight	0 – 1	0.8	—	Rotor weight
wash	0 – 1	0.55	—	Rotor wash
turbine	0 – 1	0.75	—	Turbine detail
distance	0 – 1	0.3	—	Overhead distance
seed	int	1	—	Variation, reproducible

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

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