Sound diffusion is a very important parameter in an overall assessment of the quality of an auditorium. This is why, the use of sound diffusers, especially sound phase diffusers, has been gaining more and more popularity. The most common structures are PR and QR diffusers. However, it was noted that the diffusers should be designed not only based on their diffusion and scattering coefficients, but also other parameters (e.g. sound absorption) determined with regard to the location of a diffuser in an auditorium. In this paper, the optimization algorithms are used for the designs of the diffusers. Different objective functions are proposed, depending on the locations of the diffusers in a typical shoe-box shaped performance hall, i.e., minimizing sound absorption coefficient, reduction of specular reflection, and intentional redirection of reflections. In the paper, a structure of 2 × 11 wells of a maximum depth of 0.15 m, and of a total width of 0.6 m is optimized. The final structures are significantly better than the commonly used PR and QR diffusers of similar dimensions in terms of the acoustic performance, with regard to their location. The presented methodology can be used for designing precise sound diffusers made of different base elements, e.g., quarter-wave diffusers or metamaterials, specific for each application.

声音扩散是对礼堂质量进行总体评估的一个非常重要的参数。这就是为什么使用扩音器，尤其是声相位扩音器，越来越受到欢迎的原因。最常见的结构是PR和QR扩散器。但是，应注意，不仅应根据扩散器的扩散系数和散射系数来设计扩散器，而且还应根据关于扩散器在礼堂中的位置确定的其他参数（例如吸声）进行设计。在本文中，优化算法用于扩散器的设计。根据扩散器在典型的鞋盒形表演厅中的位置，提出了不同的目标函数，即最小化吸声系数，减少镜面反射，以及故意重定向反射。在本文中，一个2×11孔的结构 最大深度为0.15 m，总宽度为0.6 m。就声学性能而言，就其位置而言，最终结构明显优于尺寸相似的常用PR和QR扩散器。所提出的方法可以用于设计由不同的基本元件制成的精确的声音扩散器，例如针对每种应用的四分之一波长扩散器或超材料。