Stadium Acoustic Decay (RT60)

Use the Sabine formula to estimate how structural volume and roof materials affect chant retention.

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Sabine Formula: RT60 = 0.161 * V / A. Bowl stadiums with open roofs lose energy rapidly (RT60 < 1.2s); enclosed steep stands retain it (RT60 > 2.5s).

Stand Volume (Cubic Meters) Effective Absorption Area (Sqm) Material Coefficient

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Interpreting the Data

A lower RT60 means chants die quickly. A higher RT60 means chants overlap and become muddy. The sweet spot for a "wall of sound" is between 1.8s and 2.5s, allowing distinct syllables in chants to overlap harmoniously without losing tempo.