Title:
Apparatuses And Methods For Sound Absorption Using Hollow Beads Loosely Contained In An Enclosure

dc.contributor.patentcreator Ahuja, Krishan Kumar
dc.date.accessioned 2017-05-12T14:27:22Z
dc.date.available 2017-05-12T14:27:22Z
dc.date.filed 3/27/1995
dc.date.issued 7/7/1998
dc.description.abstract A sound absorption device in accordance with this invention includes an enclosure loosely containing hollow beads. Preferably, the hollow beads have openings, and differ with respect to the volume of the hollow space defined by the walls of the beads, the wall thicknesses of the beads, the size of the openings of the beads and/or the number of openings on the beads. Through Helmholtz resonance, vorticity and tortuous path scattering, the beads damp sound waves over a broad range of frequencies. Preferably, the beads are formed from a material able to withstand relatively high temperatures, such as ceramic or nickel. The beads can thus be used to damp sound in applications which generate significant heat in addition to sound, such as aircraft engines, rocket motors or other loud, heat-generating sources, for example. Also, by forming the beads from a material with a relatively low thermal conductivity, the beads can also be used for thermal insulation in addition to sound absorption.
dc.description.assignee Georgia Tech Research Corporation
dc.identifier.cpc A47H23/08
dc.identifier.cpc E04B1/7604
dc.identifier.cpc E04B1/84
dc.identifier.patentapplicationnumber 08/412516
dc.identifier.patentnumber 5777947
dc.identifier.uri http://hdl.handle.net/1853/57269
dc.identifier.uspc 367/1
dc.title Apparatuses And Methods For Sound Absorption Using Hollow Beads Loosely Contained In An Enclosure
dc.type Text
dc.type.genre Patent
dspace.entity.type Publication
local.contributor.corporatename Georgia Institute of Technology
local.relation.ispartofseries Georgia Tech Patents
relation.isOrgUnitOfPublication cc30e153-7a64-4ae2-9b1d-5436686785e3
relation.isSeriesOfPublication 0f49c79d-4efb-4bd9-b060-5c7f9191b9da
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