Full Title

Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs (scaffolds, shutterings E04G; structures specially adapted for buildings for special purposes, general layout of buildings, e.g. modular co-ordination, E04H) > Room acoustics, i.e. forms of, or arrangements in, rooms for influencing or directing sound (E04B1/82 takes precedence; acoustics in general G10K11/00; electric signal processing for producing a reverberation or echo sound G10K15/08)