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Class Information
Number: 181/293
Name: Acoustics > Sound-modifying means > Sound absorbing panels > With channels or cavities in surface layer
Description: Subject matter wherein the outer face is formed with channels or cavities.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8712070 Simultaneous enhancement of transmission loss and absorption coefficient using activated cavities Apr. 29, 2014
8684134 Gypsum-panel acoustical monolithic ceiling Apr. 1, 2014
8631901 Acoustic structure Jan. 21, 2014
8607925 Wedge-shaped acoustic diffuser and method of installation Dec. 17, 2013
8579080 Anti-noise panel Nov. 12, 2013
8573356 Adjustable device for acoustic modification Nov. 5, 2013
8544601 Sound-absorbing noise barrier Oct. 1, 2013
8424637 Systems and methods for providing an asymmetric cellular acoustic diffuser Apr. 23, 2013
8418807 Noise abatement wall and a noise abatement wall system Apr. 16, 2013
8408358 Morphing resonators for adaptive noise reduction Apr. 2, 2013
8381872 Acoustic composite Feb. 26, 2013
8367184 Structured films having acoustical absorbance properties Feb. 5, 2013
8294059 Process for producing through-holes in sheet members Oct. 23, 2012
8230969 Acoustic panels, apparatus and assemblies with airflow-resistive layers attached to sound incident surfaces Jul. 31, 2012
8184820 Indirect acoustic transfer control of noise May. 22, 2012
8172037 Coating for acoustic treatment that integrates the function of hot-air treatment of frost May. 8, 2012
8157052 Acoustic structure Apr. 17, 2012
8144889 Noise control system using smart materials Mar. 27, 2012
8020662 Acoustic base tray for a dishwashing appliance, and associated method Sep. 20, 2011
8006802 Acoustic structure and acoustic room Aug. 30, 2011
7997384 Multilayer board for reducing solid-borne sound Aug. 16, 2011
7967108 Acoustic liners Jun. 28, 2011
7963364 Porous metal bodies used for attenuating aviation turbine noise Jun. 21, 2011
7938228 Process for producing sound absorber and produced by the process, sound absorber and sound absorbing structure May. 10, 2011
7931117 Glazing unit with improved vibro-acoustic damping properties, method for making such glazing unit and method for acoustic protection in a vehicle passenger compartment Apr. 26, 2011
7870931 Sound-absorbing insulation element with strengthening embossments Jan. 18, 2011
7854298 Acoustic septum cap honeycomb Dec. 21, 2010
7798285 Acoustic barrel for aircraft engine nacelle including crack and delamination stoppers Sep. 21, 2010
7743884 Sandwich panel for sound absorption Jun. 29, 2010
7721844 Vibration damping apparatus for windows using viscoelastic damping materials May. 25, 2010
7721846 Sound absorbing material May. 25, 2010
7721847 Acoustic panel May. 25, 2010
7712579 Floor silencer May. 11, 2010
7703575 Three-dimensional tessellated acoustic components Apr. 27, 2010
7677359 Sound absorbent Mar. 16, 2010
7670671 Dust, water and sound barrier including a witness line for ease of application to a vehicle door Mar. 2, 2010
7661511 Board building material, board building material producing method, board building material installation method Feb. 16, 2010
7654364 Sound absorbing structure Feb. 2, 2010
7604094 Acoustic scatterer Oct. 20, 2009
7594365 Heating floor system Sep. 29, 2009
7575266 Interior member for cab of work vehicle and method for forming same as well as wall member Aug. 18, 2009
7571790 Sound absorption block and method of constructing the same Aug. 11, 2009
7549507 Duct wall structure Jun. 23, 2009
7520370 Combination acoustic diffuser and absorber and method of production thereof Apr. 21, 2009
7520369 Soundproofing panel with beads, and a method of manufacture Apr. 21, 2009
7510052 Acoustic septum cap honeycomb Mar. 31, 2009
7503424 Vehicle cab noise suppressing system Mar. 17, 2009
7497301 Tubular acoustic silencer Mar. 3, 2009
7484592 Sound attenuation panel comprising a resistive layer with reinforced structural component Feb. 3, 2009
7469770 Anechoic visco-thermal liner Dec. 30, 2008

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