Car Pass

How it's made

Source

a four-cylinder combustion engine fires at RPM / 30 Hz; twelve phase-related harmonics, half-order crank vibration and firing-modulated noise supply exhaust pulses and mechanical roughness.

Body

broad exhaust weighting around 220 and 620 Hz, with combustion noise at 160–1500 Hz; no high-Q resonances. Independent tyre contact noise spans 350–6500 Hz over a 100–350 Hz rolling bed.

Motion

a 10–36 m/s straight trajectory, 3–14 m from the listener, uses retarded emission position. Pitch follows 343 / (343 + radial velocity); inverse-distance gain and air absorption follow distance.

Envelope

closest approach is near 1.75 s; front and rear axles are 2.65 m apart. A trailing air wake follows the body by 0.1 s. Smooth 0.3 s onset and 0.8 s departure fades end at 3.9 s without a cut.

Space

engine and tyre sources pan together along the trajectory, with a narrow decorrelated tyre bed; the exhaust projects slightly more strongly behind the car. The sound is dry, without baked-in reverb.

Variation

seeded phases, RPM offset within 1%, slow 0.4% combustion wander and independent road noise. Presets cover slow urban driving, fast road speed, wet-road spray and a low, exhaust-led pass.

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