Experimental determination approximation of the stage opening absorption spectrum in theatres by using the response surface methodology. Case study.
Pérez Aguilar, Blanca; Guillén Guillamón, Ignacio; Gómez Lozano, Vicente; Llopis Reyna, Ana.
Centro de Tecnologías Físicas. Universidad Politécnica de Valencia.
Abstract:
Reverberation time is one of the key parameters which determine the suitability of a theatre or music hall for their intended activity. It depends on the shape and size of the enclosure as well as the materials used in the construction of the room and the way they are built (with or without space behind them, flexible, rigid, etc.). The absorption coefficient of the different construction details is needed to design an enclosure. They will be taken from the bibliography, or from laboratory tests. Although this values not always match reality, due to difficulties of reproducing in situ the laboratory ideal conditions and delimited surface.
Mathematical simulation programs are used to predict the acoustics of a room by introducing the parameters which defines them, also they allow to test the acoustics in real rooms. The adjustment of an enclosure can be made by an iterative process or by the response surface methodology, RSM.
RSM will be used to create a new methodology which allows us obtaining the absorption spectrum of non-superficial elements.
Keywords: RSM; absorption spectrum; room acoustics; reverberation time; simulation; modeling