Is there anybody to explain Sabeins formula for reverberation time briefly?
1) The reverberation time depends on the frequency of the sound wave because absorption coefficient of most of the materials increases with frequency. Hence high frequency would have shorter reverberation time. Prof. Wallace C. Sabine (1868-1919) summarized his results in the form of the following equation: Reverberation Time T ∞ (Volume of the Hall, V) / (Absorption Time, A) Or T = KV / A -> (1), where K is proportionally constant. It is found to have a value of 0.161 when the dimensions are measured in metric units. Thus,T = (0.161V) / A, where A is given by ΣαS -> (2). Here the value of α depends on the nature of the material as well as the frequency of sound and S is the surface area of the material. Using (1) and (2) Sabine’s formula is rewritten as T = (0.161V) / ΣαS 2) Sabine’s work made the breakthrough to link the scientific knowledge to design applications by developing the reverberation formula (Sendra, 1999). RT=0.163V/A (1.1) Where RT reverberation time, V room volume, A r
