Note: Historically, outside of concert halls, there are room shapes that redirect sound. [1] Dynamically changing room accoustics would be an interesting moder

Note: Historically, outside of concert halls, there are room shapes that redirect sound. [1] Dynamically changing room accoustics would be an interesting modern take [2], but think that'd have to wait for equivalent of 3d version of eink and/or readily available dynamic mass density and acoustic metamaterials. [1] From Whispering Galleries to Echo Chambers, These Five Architectural Structures Have Extraordinary Acoustics : https://www.smithsonianmag.com/travel/worlds-weirdest-echoes-where-hear-them-180963307/ https://www.smithsonianmag.com/travel/worlds-weirdest-echoes... [2] The Effect on Room Acoustical Parameters Using a Combination of Absorbers and Diffusers—An Experimental Study in a Classroom : https://www.mdpi.com/2624-599X/2/3/27 https://www.mdpi.com/2624-599X/2/3/27