Conference_programme: 18.7 - Objective and subjective approach in the assessment of sound diffusion in rooms

Lecture: Optimized diffusers for concert halls

Author(s): Pilch Adam, Chojnacki Bartłomiej, Binek Wojciech

Summary:
Sound diffusion is very important parameter in overall assessment of the quality of concert halls. It is a reason why sound phase diffusers, as an effective structure improving diffusion of the sound in an enclosed space, are becoming more and more popular.\nNowadays, diffusers are rated usually according to their diffusion or scattering coefficients. In case of large auditoriums, it is also very important to use diffusers with small sound absorption coefficient, and with suppressed specular reflection like primitive root diffusers.\n In the paper, goal functions for multiobjective optimizations were developed depending on the position of diffusers in room. What is more, different optimization methods were compared. Relationships between diffusion, scattering and absorption coefficients were presented. Optimized structures were compared with existing diffusers and their impact on acoustic parameters of selected concert hall was presented.

Corresponding author

Name: Dr Adam Pilch

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Country: Poland