For unamplified auditoria, reverberation time is only part of the acoustic story. The timing, strength and direction of first-order reflections from ceilings and walls can strongly influence clarity, intimacy, loudness and spatial impression. This article explores how PaAcoustical uses real-time Grasshopper analysis to identify which architectural surfaces generate beneficial or detrimental reflections, and how these reflections are distributed across the audience.

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