Footstep on Thin Ice Crust

How it's made

Source

a boot loads frozen ground, breaking its thin ice crust at heel and toe, 65–120 ms apart. Rounded 3 ms low-frequency contacts support 0.4–1 ms bright, band-limited fracture excitations.

Body

constrained ice flakes have inharmonic modes near 1.7, 2.8, 4.5 and 6.7 kHz, with 25–85 ms decay times; these are damped by the boot and ground rather than ringing like a free glass vessel.

Layers

a 90–170 Hz sole thud, two brittle cracks, clustered shard fractures, and a granular crush bed. The crush low-pass falls from 8.5 to 2.8 kHz as loose fragments settle under pressure.

Envelope

heel at onset, toe after the weight roll; irregular microfractures continue to 260 ms. All layers decay by 390 ms, followed by a smooth safety fade and silent tail within 500 ms.

Variation

seeded timing, fracture strength and tuning prevent identical repeated steps. Weight changes contact mass; crust changes flake size and ring; crush changes fragment count and settling friction.

Presets

cautious thin crust, sharp glaze, heavy boot breakthrough, and a longer granular frozen crust.

Space

dry close perspective; no reverberation or unrelated ice-lake pitch sweeps.

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