AN ACOUSTIC ATTENUATOR ELEMENT AND AN ACOUSTIC ATTENUATOR FOR A VENTILATION DUCT

摘要

An acoustic attenuator for reducing noise levels in a low energy or natural ventilation system/ natural ventilation when placed in a, ventilation channel of a building, the acoustic attenuator comprising: a plurality of acoustic attenuator elements co-operable with one another by means of respective complementary formations to form a self supporting structure having a plurality of channels for the flow of air by means of minimal air pressure characteristic of a low energy or natural ventilation system, the plurality of channels being provided between the acoustic attenuator elements and being defined by the shape of the acoustic attenuator elements; and wherein each acoustic attenuator element is made of acoustic absorbent material for absorbing sound.