| 摘要 |
<p>An acoustic damping system for ducted air, e. g. for ventilation systems, has the input air, from a circular cross section duct, split into separate feeds through damping chambers lined with absorbent material, e. g. mineral fibre. The feeds have an oval cross section to enable the system to be buried inside the rendering of the wall. The outlet air is ducted out via oval slots,.</p> |
