| 摘要 |
<p>An acoustic attenuator (22) for a ventilating unit (1) includes a housing (24) comprising a plurality of walls defining an enclosure. A first port assembly (1) comprises a plurality of first ports arranged in a fixed relationship to each other on a first wall of the housing (24) corresponding to the position of the ports of the ventilating unit. A second port assembly (34) comprises a plurality of second ports corresponding to the plurality of first ports and arranged in a fixed relationship to each other on a second wall of the housing (24). The second port (34) assembly is configured for connection to a ventilation duct element. A plurality of fluid conduits (38) fluidly connect each of the first ports to each of the corresponding second ports. A sound attenuating material (40) surrounds the conduits (38) and the conduits (38) are configured to permit sound waves from within the conduits (38) to travel into the sound attenuating material (40). The conduits (38) are fluidly isolated from each other to prevent air from passing from any one of the conduits (38) into any one of the other conduits (38) through the sound attenuating material (40).</p> |
