Sledgehammer on Concrete

How it's made

Source

a steel sledgehammer head (≈ 5 kg) hits a concrete slab. Contact lasts 1–3 ms: a broadband click with a short low-passed "thud" body, followed within 10–40 ms by the slab cracking (2–5 kHz noise burst).

Body

the slab rings in dense, strongly damped stone modes (≈ 60–400 Hz, 0.1–0.4 s) and its bending mode drops from ≈ 110 Hz to ≈ 55 Hz as the crack opens, giving the dense low hit; the ground adds a brown-noise boom.

Debris

after the crack, fragments fall and slide for 0.1–0.7 s: sparse gritty ticks (crackle band-passed at 0.8–4 kHz) plus a handful of individual stone chips (high stone modes, 1–4 kHz, 15–60 ms) at random times.

Dust

a cloud of fine particles hisses as pink-ish noise at 3–9 kHz, rising briefly after the crack (≈ 60 ms) and fading over most of the 0.9 s.

Envelope

attack < 1 ms, low thump decays in ≈ 0.3 s, crumble in ≈ 0.7 s, dust in ≈ 0.85 s; a final fade ends it.

Variation

`rng` varies mode tuning, chip timing/pitch and crackle texture; `weight` scales slab size and hammer mass, `crumble` and `dust` set the debris and hiss levels, `crack` sets the sharpness of the fracture.

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