Indoor Thunder

How it's made

Source

pinned Thunder Crack provides the outdoor pressure wave, softened to its lowest sharpness. Independent pink-noise swells at 0.38 and 1.15 s extend the indoor low-frequency arrivals.

Body

walls and closed glazing remove outdoor treble; the transmitted boom occupies 32–500 Hz, with a falling 480–150 Hz ceiling. Broad room modes near 73 and 129 Hz reinforce the pressure.

Windows

a pressure-driven 220–1100 Hz sash buzz follows the boom; pressure also shakes loose pane stops and a wooden sash in two irregular, decelerating clusters. Rounded 1.5–4 ms contacts excite damped 190–1700 Hz inharmonic modes lasting 45–180 ms.

Envelope

the first boom drives the strongest rattle; a smaller arrival renews it around 1.2 s. Rolling low-frequency energy fades over 4.8 s, with a smooth final fade ending at 5.0 s.

Space

quiet 23 and 41 ms low-passed reflections represent the indoor boundary, not a large hall.

Variation

seeded noise, contact spacing, mode tuning and stereo placement vary independently. Insulation, sash looseness, pane size and rolling duration distinguish four room/window presets.

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