Snowball Hit

How it's made

Source

a packed snowball hitting a surface. Contact is a soft 2-6 ms deceleration of a wet, porous mass, so there is no hard click: the strike is a low-passed noise burst with a slow attack.

Body

three layers. A muted thud (sine falling 130 -> 70 Hz in ~40 ms) from the coat or wall absorbing the momentum; a powdery puff (pink noise band-passed 500-3500 Hz, 60-120 ms) as the ball bursts and air escapes; a fine crumble (sparse unipolar ticks high-passed above 2.5 kHz, band sweeping down 6 -> 2.5 kHz) as fragments fall and settle.

Envelope

thud ~70 ms, puff peaks at ~8 ms and is gone by ~150 ms, crumble starts ~20 ms after contact with a density that decays exponentially over 0.15-0.3 s. Total ~0.35 s.

Variation

`rng` jitters thud pitch (+-6 %), puff centre and crumble timing. Hardness moves the surface from a soft coat (thud, damped puff) to a wall (brighter puff, more crumble); packing sets how dense the ball is.

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