ASTM E 336 - 05 Standard Test Method for Measurement of Airborne Sound Attenuation between Rooms in Buildings

American Society for Testing and Materials (ASTM). Current edition approved April 1, 2005. Published April 2005. Originally approved in 1971. Last previous edition approved in 2005 as E 336 – 05. 11 p. The sound isolation between two spaces in a building is determined by a combination of the direct transmission through the nominally separating building element (as normally measured in a laboratory) and any transmission along a number of indirect paths, usually referred to as flanking paths. Fig. 1 illustrates the direct paths and some possible structural flanking paths. Additional non-structural flanking paths may include transmission through common air ducts between rooms, or doors to the corridor from adjacent rooms.