IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0243923
(2008-10-01)
|
등록번호 |
US-8459407
(2013-06-11)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
8 |
초록
▼
Methods and devices for increasing the sound attenuation properties of a noise suppression device are provided. Various embodiments include sound-attenuating cavities with improved sound capturing openings. In some embodiments, the sound capturing openings include holes surrounded by projections. In
Methods and devices for increasing the sound attenuation properties of a noise suppression device are provided. Various embodiments include sound-attenuating cavities with improved sound capturing openings. In some embodiments, the sound capturing openings include holes surrounded by projections. In other embodiments, the sound capturing openings include angled slats. Embodiments also include sound capturing devices that include the improved sound capturing openings, such as silencers, vent hoods, barrier walls, air exchanges, and air intake and exhaust ducts.
대표청구항
▼
1. A system, comprising: a sound-attenuating device, comprising:a hollow wall having a sound-attenuating cavity;a sound-attenuating material disposed in the sound-attenuating cavity of the hollow wall; anda plurality of openings into the hollow wall, wherein the openings are disposed adjacent projec
1. A system, comprising: a sound-attenuating device, comprising:a hollow wall having a sound-attenuating cavity;a sound-attenuating material disposed in the sound-attenuating cavity of the hollow wall; anda plurality of openings into the hollow wall, wherein the openings are disposed adjacent projections that enable entry of sound waves into the hollow wall and substantially block departure of the sound waves away from the hollow wall, and the projections comprise inwardly tapered projections that extend inwardly from the hollow wall into the sound-attenuating cavity, wherein the inwardly tapered projections completely overlap the openings to block a straight path through the openings, wherein the hollow wall comprises first and second perforated walls that oppose one another about the sound-attenuating material disposed in the sound-attenuating cavity, the first perforated wall comprises a first plurality of openings with a first plurality of inwardly tapered projections that extend inwardly from the first perforated wall into the sound-attenuating cavity, and the second perforated wall comprises a second plurality of openings with a second plurality of inwardly tapered projections that extend inwardly from the second perforated wall into the sound-attenuating cavity, wherein the first plurality of inwardly tapered projections each comprise a first section angled inwardly with respect to a second section about a first vertex, the second plurality of inwardly tapered projections each comprise a third section angled inwardly with respect to a fourth section about a second vertex disposed across the first vertex to direct the sound waves into the sound-attenuating material and bounce the sound waves back and forth between the first and second perforated walls. 2. The system of claim 1, comprising a conduit having the hollow wall, wherein the plurality of openings are disposed along an interior of the conduit. 3. The system of claim 1, wherein the hollow wall comprises a first unperforated wall and a second perforated wall that oppose one another about the sound-attenuating material disposed in the sound-attenuating cavity. 4. The system of claim 1, wherein the projections comprise a plurality of angled slats in a series along at least one side of the hollow wall, and the openings are disposed between the angled slats. 5. A system, comprising: a sound-attenuating device, comprising: a fluid flow path;a first perforated wall having first and second sides that are opposite to one another, wherein the first side faces the fluid flow path, and the second side faces away from the fluid flow path;a sound capturing region adjacent the second side of the first perforated wall, wherein the first perforated wall comprises a first plurality of openings adjacent a first plurality of inwardly tapered projections that extend inwardly from the first perforated wall into the sound capturing region, wherein the first plurality of inwardly tapered projections completely overlap the first plurality of openings to block a straight path through the first plurality of openings; anda second perforated wall disposed opposite from the first perforated wall about the sound capturing region, wherein the second perforated wall has third and fourth sides that are opposite to one another, the third side faces the fluid flow path, the fourth side faces away from the fluid flow path into the sound capturing region, and the second perforated wall comprises a second plurality of openings adjacent a second plurality of inwardly tapered projections that extend inwardly from the second perforated wall into the sound capturing region and wherein the first plurality of inwardly tapered projections each comprise a first section angled inwardly with respect to a second section about a first vertex, the second plurality of inwardly tapered projections each comprise a third section angled inwardly with respect to a fourth section about a second vertex disposed across the first vertex to direct the sound waves into a sound-attenuating material and bounce the sound waves back and forth between the first and second perforated walls. 6. The system of claim 5, comprising a sound-attenuating material disposed in the sound capturing region. 7. The system of claim 5, comprising the sound-attenuating material disposed in the sound capturing region. 8. The system of claim 5, wherein the first plurality of inwardly tapered projections are slanted toward a noise source. 9. A system, comprising: a sound-attenuating device, comprising: a sound-attenuating material;a first perforated wall disposed along a first side of the sound-attenuating material, wherein the first perforated wall comprises a first plurality of openings with a first plurality of tapered projections that are slanted relative to the first perforated wall into the sound-attenuating material; anda second perforated wall disposed along a second side of the sound-attenuating material opposite from the first perforated wall, wherein the second perforated wall comprises a second plurality of openings with a second plurality of tapered projections that are slanted relative to the second perforated wall into the sound-attenuating material, and the first and second plurality of tapered projections are to direct sound waves into the sound-attenuating material and bounce the sound waves back and forth between the first and second perforated walls, wherein the first and second plurality of tapered projections completely block a straight line path of the sound waves in a perpendicular direction through the first and second perforated walls and wherein the first plurality of inwardly tapered projections each comprise a first section angled inwardly with respect to a second section about a first vertex, the second plurality of inwardly tapered projections each comprise a third section angled inwardly with respect to a fourth section about a second vertex disposed across the first vertex to direct the sound waves into the sound-attenuating material and bounce the sound waves back and forth between the first and second perforated walls. 10. The system of claim 9, wherein at least one of the first or second plurality of tapered projections comprises inwardly tapered projections that extend inwardly from the first or second perforated wall into a sound capturing region having the sound-attenuating material. 11. The system of claim 9, wherein the sound-attenuating device comprises a baffle within a conduit between first and second portions of a fluid flow path, and the baffle comprises the first and second perforated walls on opposite sides of the baffle. 12. The system of claim 9, comprising a vent hood having the sound-attenuating device. 13. A method of attenuating sound waves, comprising: receiving sound waves from a noise source through one or more openings in a hollow wall that defines a sound-attenuating cavity having a sound-attenuating material; andblocking the sound waves from exiting through the one or more openings with one or more inwardly tapered portions that surround the one or more openings, wherein the one or more inwardly tapered portions project inwardly from the hollow wall into the sound-attenuating cavity and the one or more inwardly tapered portions completely overlap the one or more openings to block a straight path through the openings and wherein the first plurality of inwardly tapered projections each comprise a first section angled inwardly with respect to a second section about a first vertex, and a second plurality of inwardly tapered projections each comprise a third section angled inwardly with respect to a fourth section about a second vertex disposed across the first vertex to direct the sound waves into the sound-attenuating material and bounce the sound waves back and forth between the first and second perforated walls. 14. The method of claim 13, wherein the inwardly tapered portions are slanted toward the noise source. 15. The method of claim 13, wherein blocking the sound waves from exiting through the one or more openings comprises reflecting the sound waves from the one or more inwardly tapered portions. 16. The system of claim 1, comprising a noise source, wherein the sound-attenuating device is configured to receive the sound waves upstream or downstream of the noise source. 17. The system of claim 16, wherein the noise source comprises a turbine, a machine, a heating system, an air conditioning system, a motor or engine, a compressor, a pump, a tool, or any combination thereof. 18. The system of claim 1, comprising an air intake section or an exhaust section having the sound-attenuating device. 19. The system of claim 1, wherein the sound-attenuating device comprises a sound dampening panel.
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