Pneumatic Jackhammer

How it's made

Source

a pneumatic piston drives a steel chisel into concrete at 12-30 blows/s; 0.5 ms attacks excite broadband fracture bursts, a low impact pulse and short inharmonic steel resonances.

Body

loaded tool modes around 310, 790 and 1730 Hz scale down with mass; T60 is 18-55 ms. Concrete contact adds a falling 110-190 Hz pulse and a 12-30 ms band-limited crushing burst.

Envelope

exhaust follows each impact by 7 ms, opening over 2 ms and decaying over 20-35 ms. A quiet continuous air bed joins the pulses; fracture brightness falls during each blow.

Rhythm

the 3 s loop contains an integer number of blows at every integer rate. Timing wanders by less than 1 ms; level and tuning vary per blow, with slow periodic loading variation.

Debris

independent 25-85/s granular chips have 1 ms attacks and 6-22 ms damped noise tails.

Variation

rate sets speed, mass sets tool size, bite sets contact hardness, air sets exhaust, rubble sets loose debris. Presets cover heavy breaking, fast chiselling, rubble and open exhaust.

Space

dry close machinery with a narrow debris spread; no baked room or distant compressor.

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