Abstract
The paper investigates the shape dependence of the acoustic performances of space with different plans covered by a hyperbolic paraboloid cables net and membrane roof. In addition, the paper study the differences of acoustic performances between four different configurations: sport arena and empty, partially occupied and full concert hall. The aim is to compare the shape dependence of the acoustic response for each configuration. The study is focused on different geometries: four different plan shapes (i.e., square, circular, rectangular and elliptical) and two different curvatures. The differences of acoustic efficiency are compared using some representative parameters like the reverberation time, ( $$T_{30}$$ ), the clarity ( $$C_{80}$$ ), the definition ( $$D_{50}$$ ) and the initial time delay gap. In addition, the paper compares the acoustic response for all concert hall configurations and all geometries with permanent and temporary improvements.
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