Influence of simple room geometries on acoustical parameters
Keywords:Acoustic wave absorption, Acoustic wave reflection, Ceilings, Computer simulation, Floors, Reverberation, Theaters (legitimate), Early decay time (EDT), Reverberation time (RT)
AbstractA possible explanation for the difference between the early decay time (EDT) and the reverberation time (RT) in most rooms was suggested by Hodgson. The hypothesis considers: (1) a theatre or concert hall, in its simplest form, as a six-sided box with acoustical absorption on only one of the six sides (the floor); (2) the early reflected sound to be influenced by the sides of the box that are closest to each other; and (3) in a flat and wide room, the closest pair of sides is the ceiling and the floor with the floor being the only acoustically-absorbent surface in the box. To test this hypothesis, several experiments were performed using computer models of six-sided shoe box and fan-shaped rooms.
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