Modular sound dampers for metal ducts - comprise standard rubber edged units assembled to match duct cross-section

摘要

A unit is for the construction of a sound-damping screen for a sheet-metal duct. It is adaptable for use in ducts of any cross-section. Each unit forms a hollow cuboid, made of fibre plates (2), closed on its face (4) and covered on the outside (3) with a coating which may be made of sprayed-on neoprene. The hollow space may be filled with mineral wool. Units are made in standard sizes and fitted together to achieve the size needed for fitting in a given duct.