For optimal sound diffusion in a conference room, which shape is preferable?

The optimal shape for sound diffusion in a conference room is convex. This is because a convex shape helps to scatter sound waves in different directions rather than allowing them to concentrate in one spot. When sound waves hit a convex surface, they are reflected off at varying angles which promotes an even distribution of sound throughout the space. This is crucial in a conference room setting where effective communication is needed, as it minimizes echoes and dead spots, leading to clearer audio for all individuals present.

In contrast, flat surfaces can lead to sound reflections that cause echoes and clarity issues. Inclined surfaces may help somewhat but are not as effective as convex shapes. Concave shapes tend to focus sound waves towards a central point, which can create uneven sound distribution and amplifies certain frequencies, potentially leading to undesirable acoustics.