Influence of Sound Scattering on the Reverberation Time of a Shoebox Auditorium Using Room Acoustics Modelling
Source abstract
Abstract
This paper focuses on examining the impact of introducing sound scattering in room acoustic modelling, using a ray tracing approach. A parametric study is conducted on a simplified shoebox auditorium, isolating distinct factors, such as the average absorption of the room, room geometry, volume of the space or the introduction of prismatic-shape diffusers. Diffusion is considered by assigning a scattering coefficient (s) to the surfaces, except in the analysis of a prismatic diffuser, which is modelled using a geometric approach. Changes in the reverberation time are analyzed alongside their corresponding just noticeable differences (JNDs). It was found that sound scattering can reduce reverberation time, especially in rooms with parallel walls, but only when sufficient and well-distributed sound absorption is present. Geometric modifications that remove parallelism reduce flutter echoes and can decrease reliance on scattering. Volume scaling of a room has negligible perceptual influence on sound scattering, whereas modifying room proportions offers a stronger influence on reverberation perception. Prismatic diffusers provide efficient geometric diffusion, achieving outcomes comparable to flat surfaces assigned with medium sound scattering coefficients.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Hearing Loss and Rehabilitation · Acoustic Wave Phenomena Research · Speech and Audio Processing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
ISISE, ARISE, Department of Civil Engineering, University of Coimbra, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal
Funding
Fundação para a Ciência e a Tecnologia · Fundo Europeu de Desenvolvimento Regional · European Union · CT/MCTES · Associate Laboratory Advanced Production and Intelligent Systems ARISE
References (43)
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