The same room, twice
Hard room. Calm room.
Scroll. Sound floods a bare space, bounces off every hard surface and lingers — then absorption appears and it settles. That is the whole job, and it is what Echo predicts for your room.
1
Energy arrives
Speech and noise leave a source in every direction and hit every surface in the room.
2
Hard surfaces return it
Glass, plaster and tile send almost all of it back. The sound piles up and decays slowly — that is reverberation.
3
Absorption removes it
Porous material converts the energy to heat instead of reflecting it. Enough of it, in the right places, and the room becomes clear.
The film is an illustration of the physics, not a simulation output. Echo's figures come from the Sabine/Eyring statistical method with speech clarity per IEC 60268-16 — indicative design guidance, not a compliance measurement.