Methods Patents (Class 181/296)
  • Patent number: 10540953
    Abstract: A sound absorber includes at least one cavity and at least one mouth to communicate the at least one cavity with an outside of the sound absorber. The at least one cavity includes a top surface, a bottom surface, and a side wall. The top surface includes the mouth. The bottom surface opposes the top surface. The side wall is extended to connect the top surface with the bottom surface. At least one of the top surface and the bottom surface is inclined with respect to the side wall.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: January 21, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Ishida, Naoki Matsuda, Hiroshi Ishii, Kohta Takenaka, Keisuke Shimizu, Shogo Sakamoto, Takayuki Isaka
  • Patent number: 10189410
    Abstract: In a stowing mechanism of a vehicular door mirror device, sound is produced when a gear plate is rotated from a state in which a clutch plate has been disengaged from the gear plate and the clutch plate engages with the gear plate under biasing force from a coil spring. Butyl tape spans between a portion of the coil spring on an upper side of a gap and a portion of the coil spring on a lower side of the gap such that vibration of the coil spring is suppressed. Accordingly, the sound is able to be damped.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: January 29, 2019
    Assignee: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventors: Shigeki Yoshida, Hiroyuki Toyama
  • Patent number: 9957840
    Abstract: A gas turbine engine has a propulsor including a fan and a liner positioned upstream of the fan. The liner has a backing plate, a cellular structure with cells extending from the backing plate, and a perforated sheet with a depth defined as a distance between the perforated sheet and the backing sheet. The depth is selected to achieve a desired ratio of the depth relative to a gap?. A depth to gap ratio is substantially in a range of 0.035 to 0.08. A method is also disclosed.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: May 1, 2018
    Assignee: United Technologies Corporation
    Inventors: David A. Topol, Bruce L. Morin, Dilip Prasad, Thomas J. Ouellette
  • Patent number: 9840334
    Abstract: An auxiliary power unit inlet assembly includes an inlet duct having a first end and a second end. The auxiliary power unit inlet assembly further includes a door associated with the second end of the inlet duct. The door moves between a first position and a second position. The door closes the second end of the inlet duct when in the first position and permits air to enter the second end of the inlet duct when in the second position. The auxiliary power unit inlet assembly further includes a sound absorbing component mounted to the door and disposed proximate the inlet duct. The sound absorbing component is positioned at a location on the door such that a noise generated by the auxiliary power unit will directly impinge on the sound absorbing component.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: December 12, 2017
    Assignee: Gulfstream Aerospace Corporation
    Inventor: Mike Lucas
  • Patent number: 9708930
    Abstract: A panel is provided for attenuating noise. This panel includes a first skin, a second skin and a cellular core. The cellular core may be connected to and form a plurality of cavities between the first skin and the second skin. The cellular core may include a wall and a septum. The cavities may include a first cavity and a second cavity. The septum may fluidly divide the first cavity into a first sub-cavity and a second sub-cavity. One or more perforations in the first skin may be fluidly coupled with the first sub-cavity. One or more perforations in the wall may fluidly couple the first sub-cavity with at least a region of the second cavity.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: July 18, 2017
    Assignee: Rohr, Inc.
    Inventor: Christopher C. Koroly
  • Patent number: 9630723
    Abstract: An inlet door for an auxiliary power unit includes a door body with opposed interior and exterior surfaces. The interior surface of the inlet door is curved to diffuse sound waves received by the interior surface.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: April 25, 2017
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Farooq Rehman, James C Napier
  • Patent number: 9476359
    Abstract: An acoustic liner has a honeycomb layer disposed between a first panel and a permeable panel and includes a plurality of serpentine walls spaced apart from one-another. Adjacent serpentine walls outline in-part a first region carried by the first panel and an opposing second region carried by the permeable panel. The first and second regions are offset such that a centerline distance extending between the regions and centered between adjacent walls is greater than a distance measured directly between the panels, enabling the design of thinner acoustic liners. The regions and adjacent walls further define a cell having a constricted portion communicating between an end portion and an entry portion such that the constricted portion creates a frequency shift.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: October 25, 2016
    Assignee: Rohr, Inc.
    Inventors: Christian Soria, Jose S. Alonso-Miralles, Hwa-Wan Kwan
  • Patent number: 9453316
    Abstract: A novel extendible flexible flood barrier manufactured from textile and membrane materials has been developed which comprises a textile/membrane wall and support posts configured to be movable between a stowed position and a deployed position and wherein, in the deployed position, forms a leak-free barrier against flood water or other fluids. The flexible wall is stored in a container on one side of the opening to be protected and extended to the receiver on the opposite of the opening to deploy the barrier. Structural members, such as posts or a building itself will react to the load from the flood water impinging on the wall. Intermediate posts or bollards can be added to lengthen the wall so larger spans can be closed-off with the flexible wall. The flexible wall can be configured for use in many applications including entire buildings, building entrances, transit system passages, such as ventilation shafts or elevator shafts, stairwells, and other openings that can be threatened by flooding.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: September 27, 2016
    Assignee: ILC DOVER LP
    Inventors: David Phillip Cadogan, Jonathan Michael Hinkle, Jeffrey Lewis Roushey
  • Patent number: 9211605
    Abstract: The invention relates to a method for joining a composite sheet to a metallic substrate, wherein the composite sheet has at least one metallic top layer and at least one non-metallic layer which consists of a plastic material, wherein an opening is introduced into the composite sheet, and wherein at least one joining element is provided which is inserted into the opening of the composite sheet. A method for joining a composite sheet to a metallic substrate with process reliability and of specifying a corresponding structure is achieved by forming the joining element as a metallic sleeve, wherein the metallic sleeve is deformed, so that it joins together with the composite sheet in a form-fit and force-fit manner, and wherein the metallic sleeve is firmly bonded to the substrate with the end pointing towards the substrate using a filler material, wherein the filler material is arranged inside the sleeve.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: December 15, 2015
    Assignee: ThyssenKrupp Steel Europe AG
    Inventors: Heiko Beenken, Peter Ohse
  • Patent number: 9194293
    Abstract: An air inlet assembly comprising an entrance region configured to receive an airflow, an exit region configured to output the airflow, and an attenuation region disposed between the entrance region and the exit region. The attenuation region has a cross section aspect ratio of at least about 5-to-1, and comprises acoustic absorbing material.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: November 24, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventor: James C. Napier
  • Patent number: 9132909
    Abstract: A flap of the type that is movably connected to an aircraft wing to provide control of an aircraft in flight includes opposite ends, wherein at least a first opposite end includes a plurality of substantially rigid, laterally extending protrusions that are spaced apart to form a plurality of fluidly interconnected passageways. The passageways have openings adjacent to upper and lower sides of the flap, and the passageways include a plurality of bends such that high pressure fluid flows from a high pressure region to a low pressure region to provide a boundary condition that inhibits noise resulting from airflow around the end of the flap.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: September 15, 2015
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Mehdi R. Khorrami, Meelan M. Choudhan
  • Patent number: 9038769
    Abstract: A sound absorbing body includes parts of different densities including a plurality of non-dense parts of lower density and a plurality of dense parts of higher density. The non-dense parts and the dense parts are alternately laminated obliquely.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: May 26, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Kiyoshi Tsujino
  • Publication number: 20150083520
    Abstract: A system for reducing noise emissions in underwater environments is presented. The system can be extended to applications in any two-fluid environments where one fluid (gas) is contained in an enclosed resonator volume connected to the outside environment at an open end of the resonator body. The resonators act as gas-containing (e.g., air) Helmholtz resonators constructed into solid panels that are submerged in the fluid medium (e.g., sea water) in the vicinity of a noise generating source. The oscillations of the trapped air volume in the resonators causes reduction of certain noise energy and a general reduction in the transmitted noise in the environment of the system.
    Type: Application
    Filed: September 24, 2014
    Publication date: March 26, 2015
    Inventors: Preston Wilson, Kevin M. Lee, Mark S. Wochner, Hector L. Mendez Martinez
  • Publication number: 20150041247
    Abstract: The bandwidth or acoustical range of an acoustic structure is increased by locating a sound wave guide within the acoustic cell. The wave guide divides the cell into two acoustical chambers. The two chambers provide an effective increase in resonator length of the cell.
    Type: Application
    Filed: August 12, 2013
    Publication date: February 12, 2015
    Applicant: Hexcel Corporation
    Inventor: Fumitaka Ichihashi
  • Publication number: 20150041248
    Abstract: A multi-sectional acoustic septum that includes sections which have different acoustic resistance properties. The multi-sectional acoustic septums extend vertically with the acoustic cell and are capable of increasing the effective acoustical length of the acoustic cell. The multiple acoustic properties provided by the multiple acoustic sections also make it possible to target specific frequency ranges within the overall frequency range of the acoustic cell.
    Type: Application
    Filed: August 12, 2013
    Publication date: February 12, 2015
    Applicant: Hexcel Corporation
    Inventor: Fumitaka Ichihashi
  • Publication number: 20150021117
    Abstract: A duct and a method for damping pressure waves caused b thermoacoustic instability, the duct comprising: a locking Helmholtz resonator positioned on the circumference of the duct, the locking Helmholtz resonator tuned to a first frequency, and one or more damping Helmholtz resonators positioned on the circumference of the duct at or adjacent to 90 and/or 270 degrees from the locking Helmholtz resonator, wherein the damping Helmholtz resonators are tuned to a second frequency which is different from the first frequency of the locking Helmholtz resonator.
    Type: Application
    Filed: June 25, 2014
    Publication date: January 22, 2015
    Inventors: Jochen RUPP, Anthony John MORAN
  • Publication number: 20150001004
    Abstract: The invention relates to a method for joining a composite sheet to a metallic substrate, wherein the composite sheet has at least one metallic top layer and at least one non-metallic layer which consists of a plastic material, wherein an opening is introduced into the composite sheet, and wherein at least one joining element is provided which is inserted into the opening of the composite sheet. A method for joining a composite sheet to a metallic substrate with process reliability and of specifying a corresponding structure is achieved by forming the joining element as a metallic sleeve, wherein the metallic sleeve is deformed, so that it joins together with the composite sheet in a form-fit and force-fit manner, and wherein the metallic sleeve is firmly bonded to the substrate with the end pointing towards the substrate using a filler material, wherein the filler material is arranged inside the sleeve.
    Type: Application
    Filed: September 16, 2014
    Publication date: January 1, 2015
    Applicant: ThyssenKrupp Steel Europe AG
    Inventors: Heiko Beenken, Peter Ohse
  • Publication number: 20140353079
    Abstract: A tunable acoustic panel that functions as an acoustic diffuser and absorber is disclosed. The acoustic properties of the tunable acoustic panel can be quickly and conveniently modified by moving a handle. The tunable acoustic panel is wall-mountable for use as an acoustical room treatment to selectively vary the acoustical response of a room or performance space.
    Type: Application
    Filed: May 29, 2014
    Publication date: December 4, 2014
    Inventors: Dixon Gimpel, Matthew Hildebrand, Ronald Freiheit, Aaron T. Harris, Dennis Meyer, Mark Gallea
  • Publication number: 20140339015
    Abstract: Sound diffusers are important components in enhancing the quality of room acoustics. The present disclosure relates to a sound diffuser obtained by using properties of the cymatics phenomena. Cymatics is the study of sound and vibration made visible, typically on the surface of a plate, diaphragm or membrane. Two examples of diffusers are designed by the cymatic shapes and modeled by using a quadratic quadratic residue sequence. It is found that this type of acoustic diffusers can be used to maintain the acoustic energy in a room and at the same time can treat unwanted echoes and reflections by scattering sound waves in many directions. The design allows for creating different interior space designs by changing the arrangement of the diffuser panels, and this leads to different applications for the diffusers.
    Type: Application
    Filed: May 15, 2014
    Publication date: November 20, 2014
    Inventors: Alaa Salman Abdullah Algargoosh, Hany Elsayed Ali Hossameldin, Hala Abdelmonem Mohmoud El-Wakeel
  • Patent number: 8881864
    Abstract: An acoustic insulator for a motor vehicle is provided comprising a mass providing an acoustic barrier and a spring providing an acoustic absorber overlying the mass. The mass comprises a first acoustic mass layer underlying a second acoustic mass layer. The first acoustic mass layer is provided by a thermoplastic sheet having a thickness in a range of 0.5 mm to 1 mm. The second acoustic mass layer is provided at one or more localized areas formed in place on a backside surface of the first acoustic mass layer to increase an overall thickness of the mass at the one or more localized areas. The spring layer is formed in place on a backside of the second acoustic mass layer and the backside of the first acoustic mass layer.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: November 11, 2014
    Assignee: International Automation Components Group North America, Inc.
    Inventors: Matt Starling, John Lahl, Rose Ann Ryntz, Terrence M. McRoberts
  • Publication number: 20140318887
    Abstract: A firearm muzzle silencer includes an elongated cylindrical body having a cylindrical bore, a firearm mounting end, and a projectile discharge end. At least one helical insert is positioned in the cylindrical bore and proximate to the firearm mounting end. The helical insert has an insert axial bore that extends through the helical insert and a spiral groove formed on an exterior of the helical insert to define a spiral path between the helical insert and the cylindrical bore. A chamber is defined in the elongated cylindrical body adjacent to the helical insert, wherein the helical insert is positioned between adjacent to the helical insert and the helical insert is positioned between the chamber and the firearm mounting end. A plurality of ports is formed in the elongated cylindrical body adjacent to the spiral path, wherein the plurality of ports is in communication with the chamber via the spiral path.
    Type: Application
    Filed: February 12, 2014
    Publication date: October 30, 2014
    Applicants: Gemtech, GSL Technology, Inc.
    Inventor: GREGORY S. LATKA
  • Publication number: 20140318886
    Abstract: A phononic device is provided suitable for attenuating mechanical vibration, as well as acoustic vibration that propagate through a medium. Through the periodic inclusion of domains of a material in a matrix that vary in the ratio of the longitudinal speed of sound (CL) and the transverse speed of sound (CT) between the domains and the matrix of equal to or greater than 2.0 and 40, respectively; improved significant attenuation of vibration is achieved.
    Type: Application
    Filed: April 25, 2013
    Publication date: October 30, 2014
    Applicants: ARIZONA BOARD OF REGENTS, ON BEHALF OF THE UNIVERSITY OF ARIZONA, Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventor: Toyota Motor Engineering & Manufacturing North America, Inc.
  • Patent number: 8857565
    Abstract: A method for producing acoustical panels with a three-dimensional surface bonds stacks of design pieces to a flat panel. A layer of adhesive is applied over the assembly, and then a fabric layer is applied over the assembly to bond the fabric over the panel and design pieces.
    Type: Grant
    Filed: January 7, 2011
    Date of Patent: October 14, 2014
    Inventors: Jacque S. Harrison, Donald W. Harrison
  • Publication number: 20140299404
    Abstract: A plenum with features to disperse acoustic energy in an airflow while maintaining a relatively small pressure drop in the airflow is disclosed. A general structure of the plenum may include a perforated airflow passage surrounded by a substantially large space enclosed between the airflow passage and a plenum. The perforated airflow passage has a perforated wall that may allow the acoustic energy to be dispersed into the substantially large space when flowing through the airflow passage. Acoustic energy dispersing materials may also be disposed in the substantially large space and/or on the perforated wall to help disperse acoustic energy by, for example, absorbing the acoustic energy. The plenum can help disperse the acoustic energy while helping minimize the pressure drop in the airflow.
    Type: Application
    Filed: April 3, 2014
    Publication date: October 9, 2014
    Applicant: TRANE INTERNATIONAL INC.
    Inventors: Stephen John Lind, Dustin Eric Jason Meredith
  • Publication number: 20140284139
    Abstract: A device is provided for damping hydrosound in liquid emitted from a sound-emitting body in the liquid. The device includes a plurality of envelope bodies distributed in the liquid in an area of the hydrosound-emitting body and at a distance from each other. A material, diameter and pressure of each envelope body is configured such that a natural frequency of the envelope body corresponds to an emitted frequency range of the hydrosound so as to dampen the hydrosound. The device also includes at least one mass body disposed in the liquid. The envelope bodies are connected to the mass bodies so as to prevent the envelope bodies from rising up in the liquid.
    Type: Application
    Filed: June 10, 2014
    Publication date: September 25, 2014
    Inventor: Karl-Heinz ELMER
  • Publication number: 20140262602
    Abstract: A combination acoustic and flash suppression system and method for use with a weapon that fires a bullet. A noise suppressor module or section of the system is adapted to be connected to a distal end of a barrel of the weapon, and a flash suppressor module or section of the system is adapted to be connected to the outlet end of the noise suppressor module, so that the downstream position of the flash suppressor module relative to the noise suppressor module helps to disrupt a Mach disk from forming at a downstream location from the discharge port when a bullet fired from the barrel exits from the discharge port so as to suppress both flash and noise.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: William C. Moss, Andrew T. Anderson
  • Publication number: 20140262600
    Abstract: An acoustical phase plug for use in loudspeakers produces a planar rectangular wavefront, or a wavefront with a desired amount of curvature, from the output aperture of the phase plug device when presented with a planar circular wavefront at the input aperture. The phase plug utilizes a waveguide that equalizes the travel paths from the input aperture to the output aperture. The waveguide essentially eliminates surface discontinuities thereby resulting in the reduction of diffraction of the wavefront travelling through the phase plug device.
    Type: Application
    Filed: February 24, 2014
    Publication date: September 18, 2014
    Applicant: BAG END, INC.
    Inventor: Charles Emory Hughes, II
  • Publication number: 20140251721
    Abstract: A blower for an HVAC system of a motor vehicle. A fan is supplied with airflow by a duct having a bend adjacent to the fan that causes a low-pressure region at a face of the fan. A baffle is located immediately adjacent to the fan face and collocated with at least a portion of the low-pressure region to impede airflow through the face of the fan at that location. The baffle acts to reduce unwanted low frequency noise and improves the mechanical efficiency of the fan. The baffle covers a circular segment of the fan face and may have sound-suppressing features, such as ridges formed on at least one surfaces.
    Type: Application
    Filed: March 8, 2013
    Publication date: September 11, 2014
    Applicant: Ford Global Technologies, LLC
    Inventors: Zhengyu Liu, Ahmed Cherif, Curtis Mark Jones, Steven Pryor Perry
  • Publication number: 20140230497
    Abstract: A home appliance, such as a clothes washing machine, has a source of noise and an acoustic insulator. The source of noise moves between a first position and a second position during operation of the appliance. The acoustic insulator has a movable portion that moves with the source of noise between the first position and the second position during operation of the appliance and an interface that remains substantially stationary as the source of noise moves between the first and second positions.
    Type: Application
    Filed: February 18, 2013
    Publication date: August 21, 2014
    Applicant: Owens Corning Intellectual Capital, LLC
    Inventors: Anthony L. Rockwell, Phil Johnson
  • Publication number: 20140224570
    Abstract: An acoustical reflector is provided. The reflector includes a top end, a bottom end, a first side, a second side, a front surface, and a rear surface. The reflector may further include a plurality of reflector rows, such as vertical reflector rows. Each reflector row may be formed from the top end to the bottom end and is substantially parallel relative to one another. The plurality of reflector rows may from a concave shape on the front surface of the reflector from the first side to the second side.
    Type: Application
    Filed: February 13, 2014
    Publication date: August 14, 2014
    Inventors: Rudolph Dupuy, Rolf Nobbe
  • Publication number: 20140196979
    Abstract: A pulsation damper (1) for damping pressure pulsations of a fluid is insertable into the fluid line as intermediate piece by forming an axial flow channel (3), and the pulsation damper (1) featuring a housing (2). The pulsation damper (1) is characterized by the fact that the housing (2) has at least one hollow space (23) communicating with the flow channel (3) and in which at least one attenuator (4) is disposed movably in axial direction.
    Type: Application
    Filed: January 10, 2014
    Publication date: July 17, 2014
    Applicant: MANN+HUMMEL GMBH
    Inventors: Matthias Teschner, Panagiotis Giagounidis, Helge Krempels, Siegfried Herkommer
  • Publication number: 20140174847
    Abstract: A speaker enclosure and method of building same is provided for redirecting standing waves outside the enclosure. The enclosure includes an exterior and an interior comprised of a body having six interior surfaces defining the interior. One of the surfaces has a speaker opening and another of the surfaces has a tuned port opening and defines four corners opposite the speaker opening. An element having an acoustically reflective surface faces the interior and is positioned in a plane that intersects and is inclined with respect to each of the interior surfaces that form the corner. A handle system that includes an attachment means is mounted to the exterior of the enclosure. A rotatable and detachable handle is mounted to the attachment means.
    Type: Application
    Filed: December 23, 2013
    Publication date: June 26, 2014
    Inventor: John Smith
  • Publication number: 20140166393
    Abstract: A performance-enhancing crossover muffler for internal combustion engines includes an enclosed case having an inside, and two inlet pipes located inside the case having respective inlet ends extending through a frontside of the case for connection with two outside engine exhaust manifolds, and respective interior ends which merge together to define a merge entry. The muffler also includes one or more outlet pipes located inside the case with outlet end extending through a backside of the case for connection with an outside tailpipe, an interior end defining a merge exit, and one or more apertures in the outlet pipe communicating with the inside of the case. The muffler further includes a piping merge zone between the merge entry and the merge exit for commingling exhaust flows from the two engine exhaust manifolds. The two inlet pipes and the piping merge zone are without communication with the inside of the case.
    Type: Application
    Filed: December 19, 2012
    Publication date: June 19, 2014
    Inventors: Boyd L. Butler, Trent V. Bray
  • Patent number: 8689935
    Abstract: Air bubbles may be used to reduce radiated underwater noise. Two modalities of sound attenuation by air bubbles were shown to provide a reduction in radiated sound: bubble acoustic resonance damping and acoustic impedance mismatching. The bubbles used for acoustic resonance damping were manifested using gas-filled containers coupled to a support, and the acoustic impedance mismatching bubbles were created using a cloud of freely-rising bubbles, which were both used to surround an underwater sound source.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: April 8, 2014
    Assignee: Board of Regents of the University of Texas System
    Inventors: Preston S. Wilson, Kevin M. Lee, Mark S. Wochner
  • Publication number: 20140090922
    Abstract: A modal attenuator may include an attenuator body having a lead-in segment and a lead-out segment joined by a connection segment, a perforated screen disposed within the attenuator body and spaced apart from the attenuator body to form an annular space, and a plurality of rings disposed between the perforated screen and the attenuator body. When fluid flows through the modal attenuator, sound waves pass through the perforated screen and are reflected back by the plurality of rings to disrupt other sound waves, thereby reducing fluid noise in the modal attenuator.
    Type: Application
    Filed: September 26, 2013
    Publication date: April 3, 2014
    Applicant: FISHER CONTROLS INTERNATIONAL LLC
    Inventors: Allen C. Fagerlund, James L. Gossett
  • Publication number: 20140077031
    Abstract: An acoustic-attenuating wall panel for a nacelle of a turbine engine may include a radiused portion. The radiused portion may include an airflow surface having a concave configuration and which may be exposed to an airflow passing through the nacelle. The radiused portion may include an acoustic attenuating section.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 20, 2014
    Applicant: THE BOEING COMPANY
    Inventors: Brenda Benedetti, Robert S. Farrell, Luis R. Leon, Justin H. Lan, Garry A. Booker
  • Publication number: 20140034416
    Abstract: Apparatus and methods for attenuating noise, vibration, and/or acoustic energy in a turbomachine. The apparatus includes a first base plate having first base plate perforations defined therethrough. The apparatus also includes first and second spacers each extending from the first base plate, being spaced apart from each other, and defining a first channel therebetween. The apparatus further includes a first insert disposed in the first channel and having insert perforations defined therethrough, the first base plate, the first and second spacers, and the first insert at least partially defining a first acoustic chamber therebetween, wherein the base plate perforations and the insert perforations are in communication with the first acoustic chamber.
    Type: Application
    Filed: March 29, 2012
    Publication date: February 6, 2014
    Applicant: DRESSER-RAND COMPANY
    Inventor: Zheji Liu
  • Publication number: 20140027199
    Abstract: Vibro-acoustic attenuation or reduced energy transmission. The present invention relates to devices that display frequency zones of strong vibro-acoustic attenuation or reduced energy transmission. This can be used in particular, although not necessarily solely, in applications that require lightweight materials with good mechanical properties and good vibro-acoustic response or in applications that require materials with high sound reflection, absorption or sound isolation in a certain frequency band.
    Type: Application
    Filed: March 29, 2012
    Publication date: January 30, 2014
    Applicant: KATHOLIEKE UNIVERSITEIT LEUVEN
    Inventors: Claus Claeys, Bert Pluymers, Wim Desmet
  • Publication number: 20140027200
    Abstract: The present invention relates to a sound-proof material containing a first sound-absorbing material disposed facing a sound source, a first soft sound-insulating layer laminated on a face of the first sound-absorbing material opposite to the sound source and having an air permeability measured in accordance with JIS L1018 of 10 cc/cm2·sec or lower, a second sound-absorbing material laminated on the first soft sound-insulating layer, and a second soft sound-insulating layer laminated on the second sound-absorbing material and having an air permeability measured in accordance with JIS L1018 of 10 cc/cm2·sec or lower and a Young's modulus measured in accordance with JIS K7127 greater than or equal to five times that of the first soft sound-insulating layer, in which at least the second soft sound-insulating layer is partially or entirely bonded to the second sound-absorbing material.
    Type: Application
    Filed: January 26, 2012
    Publication date: January 30, 2014
    Applicant: NICHIAS CORPORATION
    Inventors: Tadashi Mori, Takahiro Niwa, Masaki Yoshihara, Motonori Kondoh, Kaname Arimizu
  • Publication number: 20140014437
    Abstract: A family of acoustical ceiling panels for schools, offices, hospitals and other public buildings provides for one consistent look throughout the building while yet provide a range of desired acoustical performances. The family includes a group of substrate mats of a bonded mixture of mineral fiber, glass fiber, and bi-component fibers. Each mat is chosen from a group including a thickness of ¾?, ?? and 1? depending upon acoustical performance. The group of substrate mats all have an exposed surface chosen from a group including fine texture, heavy texture, medium texture and light texture. The group of mats all have an edge chosen from a group including square, tegular and narrow tegular.
    Type: Application
    Filed: July 2, 2013
    Publication date: January 16, 2014
    Inventor: Sandra J. WILSON
  • Publication number: 20140008146
    Abstract: The invention relates to a method for the reduction of the natural vibration (resonance) of a component (2). According to the invention a vibration behavior of component (2) is determined, wherein to each of the positions having vibration amplitudes, which exceed a preset threshold value, an attenuation element (1) is locally mounted, which is formed as a multilayered adhesive element including a support layer (1.1) and a self-adhesive damping mass. Moreover the invention relates to an attenuation element (1) for the reduction of the natural vibrations of a component (2). According to the invention the attenuation element (1) is formed as a multilayered adhesive element of a support layer (1.1) and a self-adhesive damping mass (1.2), wherein the support layer (1.1) is formed of a bend-resistant material and the damping mass (1.2) preferably is formed of butyl rubber.
    Type: Application
    Filed: September 12, 2013
    Publication date: January 9, 2014
    Applicant: FAIST CHEMTEC GMBH
    Inventors: Bernd FUHRMANN, Christoph GREVENER, Christian HARDT, Zdislaw KORNACKI, Petra LAWRENCE, Heike Ursula OBST, Dimitrios PATSOURAS
  • Patent number: 8616328
    Abstract: A tensegrity apparatus having multiple tensegrity units for the transmission of solitary waves with adjustable profiles into a material or structure, and the detection of such waves from a material or structure.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: December 31, 2013
    Assignee: California Institute of Technology
    Inventors: Chiara Daraio, Fernando Fraternali
  • Patent number: 8607929
    Abstract: A moldable acoustic facing comprises cellulosic fibers and synthetic fibers entangled together. The acoustic facing has a basis weight of from about 1.5 to about 5.0 ounces per square yard (osy), a thickness of less than about 0.050?, a mean pore size of between about 8 microns and about 40 microns, and an elongation at break of at least twenty percent. The acoustic facing includes less than about five percent synthetic microfiber and has an acoustic resistance of at least about 250 Rayls.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: December 17, 2013
    Assignee: Precision Fabrics Group, Inc.
    Inventors: Richard James Bliton, Samuel Mark Gillette, Troy Raymond Buechler
  • Publication number: 20130319789
    Abstract: The invention relates to a two-stroke engine for an engine-driven tool, including a muffler, especially for a manually operated engine-driven tool such as a maintenance device for gardens or green spaces, for a hand-held tool such as a chain saw, a hand-held circular saw or an angle grinder or for a small motorcycle, a boat engine and the like, wherein the flow channel between the muffler inlet and the first chamber is formed so as to promote flow such that the exhaust gas entering the muffler inlet mainly enters the first chamber due to its inertia and once the first chamber is full flows back again. The counterpressure of the exhaust gas is produced at a point in time in which the piston releases the outlet and the fuel-air mixture at least for its most part has entered the combustion chamber through the at least one transfer passage.
    Type: Application
    Filed: March 7, 2012
    Publication date: December 5, 2013
    Applicant: MAKITA CORPORATION
    Inventor: Christian Kellermann
  • Publication number: 20130315701
    Abstract: An aircraft propulsion system has a propulsive rotor assembly rotatable about an axis of rotation and comprising a plurality of blades and a rotationally fixed vane assembly located adjacent to the propulsive rotor assembly and arranged circumferentially around the axis of rotation. As airflow enters the propulsive rotor assembly, a portion of the airflow passes over the vane assembly which is configured to direct the airflow away from the rotor blades so as to reduce the relative velocity of the redirected airflow over the rotor blades. This results in a reduced tendency of the airflow through the propulsive rotor assembly to become choked.
    Type: Application
    Filed: August 13, 2012
    Publication date: November 28, 2013
    Applicant: ROLLS-ROYCE PLC
    Inventor: Martin O. NEUTEBOOM
  • Publication number: 20130313037
    Abstract: An acoustic attenuator assembly for an acoustic tool for performing acoustic investigation of a subterranean formation is disclosed. The acoustic attenuator assembly includes a first end portion (205) and a second end portion (215) having a bore therethrough to enable passage of an electrical line. The acoustic attenuator assembly further includes a fiber portion (230) disposed between the first and second end portion so that the fiber portion attenuates at least a portion of acoustic energy when the acoustic energy is received by one or both of the first (205) and second (215) end portions.
    Type: Application
    Filed: February 11, 2011
    Publication date: November 28, 2013
    Inventors: Abbas Arian, Randall B. Jones
  • Patent number: 8584793
    Abstract: A device for reducing booming noise in a motor vehicle has a wind deflector (3) having openings. The device furthermore has an air source (1), which is arranged in the motor vehicle and connected to the wind deflector. The air provided by the air source can be channeled to the wind deflector and released through the openings (4) thereof.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: November 19, 2013
    Assignee: Continental Automotive GmbH
    Inventor: Stefan Holzinger
  • Publication number: 20130277141
    Abstract: The invention is comprised a sound deadening or sound buffering material including but not limited to, foam, plastic, or fabric that covers at least part of the child, thereby reducing both the decibel level coming from the child and the decibel level coming to the child. This creates a quieter environment for the child while serving a dual purpose to reduce any noise coming from the child.
    Type: Application
    Filed: April 24, 2013
    Publication date: October 24, 2013
    Inventors: Sam Blankenship, Peter Blankenship
  • Publication number: 20130233644
    Abstract: A method is disclosed for reducing noise and vibration within a structure of a mobile platform, wherein the noise and vibration are at least in part caused by airflow over an outer skin of the mobile platform parallel to a longitudinal line extending fore to aft along the structure. The method may involve forming the structure such that a fundamental panel vibration mode shape of the structure is not parallel to the longitudinal line.
    Type: Application
    Filed: March 6, 2013
    Publication date: September 12, 2013
    Applicant: THE BOEING COMPANY
    Inventor: Alan E. LANDMANN
  • Publication number: 20130233643
    Abstract: A muffler for raising the audible pitch of an internal combustion engine's exhaust note that includes an enclosed case having an inlet and an outlet, and a plurality of flow-directing components which are adapted to subdivide an inlet flow into a plurality of discrete interior flows, including a first interior flow providing the shortest flow length through the muffler between the inlet and the outlet, a second interior flow having a flow length at least about twice the length of the first interior flow, and one or more intermediate flows following by-pass passages to split off from the second interior flow between the inlet and the outlet and having flow lengths between the flow lengths of the first and second flows.
    Type: Application
    Filed: September 4, 2012
    Publication date: September 12, 2013
    Inventor: Boyd L. Butler