Ceiling Fan Wobble

How it's made

Source

four slowly rotating blades produce continuous pink-noise turbulence, mainly 65-700 Hz. Four blade passages per turn shape rounded airflow pulses; an unbalanced blade adds one larger swell per turn.

Motor

quiet 60, 120 and 240 Hz sine components model electromagnetic hum and housing vibration. Their amplitude follows the eccentric load slightly; the motor is secondary to the low whoosh.

Body

a loose canopy makes one muted tick per revolution. A 1.2 ms attack excites damped housing modes near 510, 1230 and 2140 Hz, with 24-65 ms T60; a filtered 8 ms contact burst adds the leading edge.

Envelope

4-8 complete revolutions in six seconds (40-80 rpm), no startup or shutdown. Air level and broad filter centre move together; ticks occur 220 ms after each revolution boundary, away from the seam.

Variation

named random streams decorrelate the narrow stereo airflow; per-tick strength and mode tuning vary by 10% and 2%. The rotating pressure envelope remains periodic and mechanically steady.

Presets

night is slow and muffled; loose canopy emphasizes ticks and imbalance; broad blades emphasize air and blade passages; close motor exposes hum with a restrained tick. No room reverberation is baked in.

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