Sound Radiation Characteristics of Rectangular Duct

Heating Ventilation and Air Conditioning systems consists of ducts that are made of thin sheets with flexible vibrating walls. These ducts are efficiently designed to supply conditioned air from one location to the other to ensure comfort living of the occupants. During this process, these ducts also carry some amount of noise generated by air-handling units (AHU). Propagating noise in a duct is radiated out along the axial direction and also in transverse direction through the duct walls