RGSR·CORE

1-D demos

Sound in air. Shaking in layered ground.

Every curve below was computed by the CORE engines and stored as numbers. Pick a case to see how it changes.

SIMULATED — not a measurement. Material values are illustrative typical values, not data from any real site.

Air — how fast sound travels, and how much it fades

Speed of sound vs temperature

Sea-level pressure. Lines: 0 %, 50 % and 100 % relative humidity. Range 0–30 °C (engine validity range).

Sound lost per 100 m, by pitch

Engine: ATMOS_ACOUSTIC v1 (speed of sound after Cramer 1993; absorption after ISO 9613-1).

Ground — one soil layer on bedrock

How much the surface amplifies shaking

A pulse from below, seen at the surface

Grey: the input pulse on bare rock. Gold: the same pulse at the top of the soil layer.

Engine: LITHOS_LAYERED v1 (vertically travelling shear waves through linear, damped layers). Bedrock: shear-wave speed 2000 m/s.