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US 9,378,721 B2Granted
Low frequency acoustic attenuator and process for making same
AssigneeZIN Technologies
InventorsBart F. Zalewski, William B. Dial
Life of this patent
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Abstract
A method of manufacturing an acoustic attenuation device includes three-dimensionally printing a pair of sheets and webs that cooperate with the sheets to define attenuation chambers. Each chamber has at least one opening through which excited air resonates.
Claims23
A method of manufacturing an acoustic attenuation device, the method comprising:
- Three-dimensionally printing a pair of sheets and webs that cooperate with the sheets to define broadband sound attenuation chambers, each chamber having at least one opening through which excited air resonates, further comprising three-dimensionally printing a partition along the length of at least one chamber to divide the at least one chamber into a pair of chamber portions, each partition including an inner wall and an outer wall spaced from the inner wall by an annular space.
A method of manufacturing an acoustic attenuation device, the method comprising:
- three-dimensionally printing a pair of sheets and webs that cooperate with the sheets to define attenuation chambers, each chamber having at least one opening through which excited air resonates, wherein the chambers include a plurality of first chambers in a first plane and a plurality of second chambers arranged in a second plane that is perpendicular to the first plane.
An acoustic attenuation device extending from a first end to a second end comprising:
- first and second sheets;
- a plurality of webs positioned between the first and second sheets and cooperating with the first and second sheets to form a series of sound attenuation chambers containing a volume and mass of air;
- a partition positioned along the length of at least one chamber to divide the at least one chamber into a pair of chamber portions, each partition including an inner wall and an outer wall spaced from the inner wall by an annular space;
- a first panel secured to the sheets and closing the chambers at the first end of the device;
- a second panel secured to the sheets and closing the chambers at the second end of the device;
- and
- an opening through which excited air resonates in fluid communication with each chamber.
4 more elements
Dependencies are inferred from the claim text.