Room Acoustic Parameters of an Auditorium using Ray Tracing Method

Abstract

Sound quality is important for concert halls, seminar room even in room of house too. Ray acoustic is used in simulating the high frequency limit when the wavelengths is smaller than the geometrical features. The ray acoustic model can play a vital role in designing an auditorium or a concert hall. The shape of the room and the building materials can impact on the sound quality. The diffusion and absorption coefficient of sounds are the main parameters of the simulation, different materials contain different value of this. The model should contain geometrical setup, different parameters of room acoustics and sound sources. The room acoustic parameters also known as sound absorption coefficient which is vary according to the materials properties. For simulation the reflection and noise of sound should consider as low or zero where for experiment it is impossible to reduce sound noise and reflection in zero. For the ideal case in auditorium, an omnidirectional sound source is used, where two models are simulated through COMSOL Multiphysics. The results contain reverberation time, sound pressure level and temporal impulse response. The main objective is to improve sound pressure level of an auditorium, also improving the audience`s listening experience and improving the reverberation time.