Media free sound attenuator
OwnerWilliam E. Thurman, Roger M. Coday +1inventors
InventorsWilliam E. Thurman, Roger M. Coday, Prabhanjan Mysore
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Abstract
A sheet metal media free sound attenuator reduces noise from machinery and gas flow in duct systems, that has a solid outer shell box and at least one flow passage made of perforated sheet. The flow passage can have a gap called expansion chamber and supports that divide cavity between a wall of the perforated passage and a wall of the outer shell box. Entrance transition and exit transition of the sound attenuator provides smooth flow into the attenuator, reduces pressure drop, and increases attenuation. In the preferred embodiment, the perforated sheet is a perforated spiral sheet.
Claims12
A fibrous filler material free sound attenuator, for attenuating sound in gas flow comprising:
- a) a shell encompassing and supporting components including at least one ovoidal form passage formed from perforated sheet for the flow of said gas, and
- b) divider plates between the shell and the ovoidal form passage forming cavities to contain gas from the gas stream passing through the fibrous filler material free sound attenuator, said gas passing through the perforated sheet of the ovoidal form passage.
A sound attenuator for attenuating sound in a duct comprising:
- a) a shell encompassing and supporting components including at least one ovoidal air passage, said shell including an air entrance and an air exit;
- and
- b) divider plates forming cavities between said shell and said ovoidal passage, said ovoidal passage including perforations that allow for sound attenuation between said ovoidal passage and said cavities.
A fibrous filler material free sound attenuator for attennuating sound in gas flow comprising a round spiral outer shell encompassing and supporting at least one ovoidal form passage perforated spiral duct for the flow of said gas.
Dependencies are inferred from the claim text.