Acoustic Analysis of a Performance Hall Using Virtual Techniques

It is known that the acoustics of a performance hall are important for the performance of artistic events. The paper presents a methodology for determining and analysing the acoustic parameters for a performance hall under construction. First, the room was three-dimensionally scanned to obtain a geometric model in a virtual environment. The initial "points cloud" was processed using specific reverse engineering techniques and methods. Thus, irregularities of a geometric nature, such as non-conforming surfaces, spikes and self-intersections, were eliminated. Also, the "points cloud" was transformed into elementary triangular surfaces. These were unified and transformed into larger continuous surfaces. Then, this surface-based geometry was transformed into virtual solids. This geometry was compared with the initial plan of the performance hall. Finally, the geometric model was imported into a finite element analysis software. In this program, the materials were attached to the solid elements of the model, then the constraints and acoustic sources were defined. The model was divided into finite elements and the simulation was run. Results maps were obtained and further analysed and compared. Based on these results, significant conclusions were drawn.