A band of noise, not one tone.
Pitch Arrangement for Tonal Control and Harmonics. PATCH takes the pitch lengths and tread-block images for a tyre, searches five million block arrangements, and returns the sequence that spreads impact energy across the spectrum instead of ringing on one tone.
The chosen sequence, drawn where it lives — around the tyre.
PATCH
Spread the impact energy across a band, instead of into one tone.
A tread with every block the same length puts all of its impact energy at a single frequency, and that tone is audible far beyond its share of the total level. PATCH takes the pitch lengths and tread-block images you already have, searches five million arrangements across twenty restarts, and lets you play back the result — optimised, uniform pitching and best random — before the mould is cut.
With generic coefficients the predicted level carries about ±3.5 dB — enough to rank designs, not to state margin against a limit. Paste in your own measured tyres to calibrate it and tighten the estimate.
PATCH brochure PDF · 1 page · 755 KBWindows desktop application, delivered as a single .exe — nothing else to install. Passenger car and truck and bus radials, calibrated separately. All calculation runs on your computer: no pitch image, tread geometry or sequence is uploaded anywhere.
The rest is easier to show than to write down.
Tell us which tool interests you and we'll walk through it on your own data — measured tyres for AIRR, a pitch set for PATCH, a mould cavity for ATLAS.