Reverberation Formula Which Seems To Be More Accurate with Nonuniform Distribution of Absorption

Reverberation measurements, made in rooms where the absorption is nonuniformly distributed, usually vary widely from the predictions based on the usually employed formulas. Based on extensive tests made in a large number of rooms, where distribution of sound absorption varies widely in uniformity, an empirically derived formula is submitted, together with photographs of graphic recorder decay curves which seem to confirm the validity of the formula. The data submitted are a small portion of the accumulated measurements, covering a period of some five to six years, in rooms of widely varying volume, widely varying boundary ratios, and marked dissimilarity in amounts of absorption and ratios of absorption distribution.