Influence of simple room geometries on acoustical parameters

John O'Keefe


A 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.


Acoustic wave absorption; Acoustic wave reflection; Ceilings; Computer simulation; Floors; Reverberation; Theaters (legitimate); Early decay time (EDT); Reverberation time (RT)

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