Ceiling Sound Reflectors to Optimize Acoustic Performance Using Parametric Tools

Abstract

AbstractThis paper aims to integrate acoustic simulations and parametric geometry modelling into the design process of architectural acoustic design. An existing conference room of 226 m3 was selected as the case study. Different geometries of sound reflectors were mounted under the ceiling, to be tested and compared in order to identify the best acoustical performance. With this purpose, a methodology consisting of three main steps was developed. First, the room was digitally modelled, and the geometry of the reflectors was parameterized through Snail and Silvereye—flat and curved surfaces were evaluated, along with different materials of the sound reflectors. The fitness function was to maximize the reflections falling into the seating area. Once the optimized geometries were identified, namely those that get the most number of reflections falling into the analysis surface, acoustic simulations were run with Pachyderm. Sound pressure level, reverberation time, and clarity sound were the indicators used for profound comparisons. Results showed a significant improvement in the acoustic performance of the auditorium from the current state to the optimized geometries. This methodology could be helpful to provide architects with acoustic feedback during the initial stages of building design and to improve the acoustic performance in their projects.KeywordsArchitectural acousticsParametric designGeometry optimizationAcoustic simulation