It seems to be common to cover walls, or large parts of them, in relatively thin absorption (9 to 15mm thick). This may be because it is heavily advertised, seems to be lower cost or because it means less paintwork needs to be done. More than likely though, it is done out of ignorance. The thought that more is better is a fallacy.

andrew steel28 November 2019Ultrafonicacoustics, absorber, acoustic absorber, soundproofing, soundproofing foam, music room, music room acoustics, classroom acoustics, boardroom acoustics, meeting room acoustics, teleconferencing, teleconferencing acoustics, videoconferencing, videoconferencing acoustics, school acoustics, school hall acousticsComment