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7604094 |
Acoustic scatterer
An acoustic scatterer element ( 10 ) incorporates a plurality of convex surfaces ( 38.1, 38.2 ) has a plurality of associated curvatures in a corresponding plurality of different directions. A...
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7594365 |
Heating floor system
Disclosed herein is a floor sound-insulating type heating system in which a floor sound-insulating structure for reducing the transmission of an impact sound from upstairs to downstairs in an...
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7575266 |
Interior member for cab of work vehicle and method for forming same as well as wall member
An object is to enhance the sound absorbing functions of an interior member, and furthermore, to increase ease of assembly of the interior member, and the interior member for the cab is integrally...
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7571790 |
Sound absorption block and method of constructing the same
A sound absorption block installed at a music box, a gymnasium, a studio, etc. to prevent sounds from being heard outside, and a method of constructing the same are disclosed. The present invention...
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7549507 |
Duct wall structure
The invention relates to an inner heat insulating and inner sound insulating structure of an HRSG duct wall in which a turbine combustion high temperature and high velocity gas whose temperature is...
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7520370 |
Combination acoustic diffuser and absorber and method of production thereof
The present invention relates to a combination acoustic diffuser and absorber and method of production thereof. The diffuser has an acoustically reflective surface that may be made by the vacuum...
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7520369 |
Soundproofing panel with beads, and a method of manufacture
A soundproofing panel having a core sandwiched between a solid wall and a porous wall. The core being connected to the walls and having partitions extending in the thickness direction between the...
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7510052 |
Acoustic septum cap honeycomb
An acoustic structure that includes a honeycomb having cells in which septum caps are located. The septum caps are formed from sheets of acoustic material and include a resonator portion and a...
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7503424 |
Vehicle cab noise suppressing system
A vehicle cab noise suppressing system includes a cab interior panel having an opening exposed to acoustic noise in the cab, an acoustic resonator chamber, and a conduit communicating the resonator...
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7497301 |
Tubular acoustic silencer
An acoustic silencer is provided by a tubular member extending along an axis and having a hollow interior defining an axial flow path therethrough. The tubular member has a sidewall with an...
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7484592 |
Sound attenuation panel comprising a resistive layer with reinforced structural component
A sound attenuation panel includes a resistive layer with a reinforced structural component, comprising at least a honeycomb structure ( 1 ) flanked, on one side, with a resistive layer ( 2 )...
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7469770 |
Anechoic visco-thermal liner
A liner assembly includes a plurality of aligned passages providing a large open area combined with openings much smaller than a length of the passages. The plurality of passages are disposed...
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7464791 |
Acoustic mats and methods for making the same
Acoustic mats include a face layer and an absorptive layer having first and second surfaces wherein the second surface of the absorptive layer may be secured to said face layer. The mat further...
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7461719 |
Resonator performance by local reduction of component thickness
Aspects of the invention are directed to a system for improving the damping performance of an acoustic resonator. According to aspects of the invention, a resonator, such as a Helmholtz resonator,...
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7451855 |
Acoustic absorbing device
An acoustic absorbing device includes a housing having a chamber formed by an outer peripheral wall and a bottom wall, a hood engaged into the housing, an absorbing member engaged into the hood,...
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7434660 |
Perforated soundproof structure and method of manufacturing the same
A perforated soundproof structure is formed by oppositely arranging an external plate 1 and an internal plate 2 having a number of through-holes 2 a . The board thickness, hole diameter and...
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7428948 |
Hybrid amplitude-phase grating diffusers
A room acoustic diffuser exploits interference, by reflecting waves out-of-phase with the specular energy, making it possible to diminish specular energy. This is achieved by using a diffuser based...
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7413053 |
Acoustic resonator with impingement cooling tubes
Aspects of the invention are directed to an acoustic resonator with improved impingement cooling effectiveness. The resonator includes a plate with an inside face and an outside face. A plurality...
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7401682 |
Architecture for an acoustic liner
An acoustic liner 20 includes a remote panel 26 , a perforated proximate panel 22 transversely spaced from the remote panel and one or more partitions 32 spanning across the space between...
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7364014 |
Sound absorbing body, sound absorbing structural body, and method of manufacturing these bodies
A sound absorbing body 40 has a molded body 44 including two unexpanded layers 41, 42 and an expanded layer 43 having a number of voids and held between these unexpanded layers 41, 42 , a...
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7322441 |
Extended bandwidth folded well diffusor
An extended bandwidth folded well diffusor extends the diffusion bandwidth of a shallow, asymmetric diffusor by incorporating maximum-depth, folded L-shaped, half-width wells on both ends (sides)...
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7318499 |
Noise suppression structure and method of making the same
An integrated noise suppression acoustic panel includes a back plate, a face plate, and a bulk foam absorber disposed between the back plate and the face plate. The bulk foam absorber is formed of...
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7314114 |
Flat panel diffuser
A device including a membrane having first and second faces; a first substrate disposed on the first face of the membrane and having (i) a plurality of first absorptive regions and (ii) a plurality...
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7311175 |
Acoustic liner with bypass cooling
An acoustic liner 20 includes a remote panel 26 , a proximate panel 28 transversely spaced from the remote panel and a resonator chamber 34 b residing between the panels. Perforations 38 ...
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7308965 |
Noise abatement wall
A noise-absorbing device includes a substantially flat base and embossed and/or hollow elements each including at least one recess. This base reveals with the embossed and/or hollow elements, a...
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7261182 |
Wide band sound diffuser with self regulated low frequency absorption and methods of mounting
The present invention relates to an acoustical diffuser device, said apparatus comprising the main body from FIG. 1 and two lateral rigid supports ( 5 ), glued to the inside of the said diffuser...
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7182172 |
Sound insulation system
A sound insulation system for use with a vehicle includes a layer of fibrous padding material having a first surface and an opposite second surface. The first surface includes multiple spaced apart...
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7124856 |
Acoustic liner for gas turbine engine
A passive acoustic liner system ( 50 ) for attenuating a sound field comprising, in acoustic series, a mode-scattering segment ( 48 ) and a sound-absorbing segment ( 40 ), wherein the mode...
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7070848 |
Vehicle acoustic barrier
An acoustic barrier that achieves excellent noise insulating properties, and is relatively thin and relatively light in weight includes a flexible thermoplastic barrier layer having a plurality of...
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6977109 |
Microperforated polymeric film for sound absorption and sound absorber using same
Microperforated polymeric films and sound absorbers using such films are provided. The microperforated polymeric films may be relatively thin and flexible and may further include holes having a...
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6953105 |
Damping foil consisting of several layers and a method for producing same
A multi-layer damping foil having a perforated lower layer facing towards a part to be damped, with properties which are suitable for adhering the damping foil onto the part. A non-perforated upper...
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6892856 |
Sound radiating structure, acoustic room and sound scattering method
Sound radiating structure includes a plurality of pipes each defining an inner cavity along the length of the pipe. Each of the pipes has an end opening at one end and is closed at the other end...
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6871725 |
Honeycomb core acoustic unit with metallurgically secured deformable septum, and method of manufacture
A honeycomb acoustic unit is provided, the unit comprising first and second honeycomb layers, the layers being made of honeycomb core, each being formed by metallurgical bonds, and a deformable...
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6840349 |
Multi-component acoustically resistive layer for acoustical attenuation panel and panel thus obtained
A multi-component acoustically resistive layer, for acoustical attenuating panels having a cellular core ( 1 ) flanked, on the sound wave arrival side, with an acoustically damping layer ( 2 ) and,...
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6820720 |
Sound-absorbing article effective over a broad frequency range
A sound-absorbing article which is one of a lining or a shaped element and which has a sound absorptive effect over a broad frequency range particularly useful in transportation vehicle when...
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6817442 |
Acoustically insulated bezel
A portion of a chassis comprised of a material forming a portion of the exterior of the chassis and a high-density flexible material adjacent an inner surface of the portion of the chassis with air...
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6815044 |
Multilayer panel with an improved noise damping
The acoustic characteristics of lightweight multilayer construction panels have been improved by the formation of three-dimensionally meandering curved slots or rows of slot sections in the core of...
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6811372 |
Device at an acoustic liner
A device at an acoustic liner for an apparatus generating sound comprises means ( 12 ) adapted to enable changes of the value of the acoustic impedance of the liner.
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6793037 |
Structured molded parts for sound absorption
Structured pre-form bodies as panel lining for wide-band sound absorption are made of an open-cell foam material having a rigid framework co-vibrating in a resonant manner at low frequencies. The...
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6789646 |
Tunable sound absorbing and air filtering attenuating device
Acoustical attenuating devices ( 52 ) and method of forming them. The attenuating devices ( 52 ) include an exterior layer ( 64 ), a sound absorption layer ( 66 ), and multiple perforated layers (...
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6789385 |
System for supplying secondary air in the exhaust system of an internal combustion engine
A reciprocating piston engine ( 2 ) includes an exhaust system comprising an exhaust pipe ( 8 ) which communicates with a silencer ( 10 ), whose upstream portion ( 11 ) is divergent in the...
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6772859 |
Embodiments of aperiodic tiling of a single asymmetric diffusive base shape
Embodiments of aperiodic tiling of a single asymmetrical diffusive base shape employ welled or stepped one-dimensional or two-dimensional diffusors, a single or compound curved surface, or an...
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6714102 |
Method of fabricating thin film bulk acoustic resonator (FBAR) and FBAR structure embodying the method
A method for fabricating an acoustic resonator, for example a Thin Film Bulk Acoustic Resonators (FBAR), on a substrate. A depression is etched and filled with sacrificial material. The FBAR is...
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6698543 |
Acoustical wall panels
An acoustical wall panel for use for reduction of sound and noise, including a panel-like structure, formed of a base, generally fabricated of fiberglass, polystyrene, etc., having a covering sheet...
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6677034 |
Aerogels, piezoelectric devices, and uses therefor
In its first aspect the invention provides an electromechanical acoustic transducer ( 5 ) which is resistively terminated at the rear with a closely-coupled sound absorber ( 7 ) made from an...
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6672426 |
Sound-insulating floor structures, sound-insulating floor members and method for constructing said sound-insulating floor structures
A sound-insulating floor structure, which can conspicuously reduce heavy floor impact sounds, is provided. The sound-insulating floor structure includes a floor base and an underfloor member. A...
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6648100 |
Method of tuning acoustical absorption in a vehicle interior
A vehicle seat cover is designed to facilitate acoustic energy absorption by forming in the cover an optimal size and arrangement of perforations based on at target noise frequency range, the...
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6615951 |
Absorbent material, consisting of a porous substance with double porosity
The invention concerns an absorbent material ( 1 ), consisting of a porous matter with open porosity ( 2 ), characterised in that it comprises a plurality of perforations ( 3 ) with varied...
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6613424 |
Composite structure with foamed cementitious layer
The present invention provides for an acoustically absorbent porous panel that is both rigid and resistant to sagging caused by moisture. The acoustically absorbent porous panel is comprised of at...
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6601672 |
Double layer acoustic liner and a fluid pressurizing device and method utilizing same
This invention relates to a double layer acoustic liner for attenuating noise and consisting of a plurality of cells formed in a plate in a manner to form an array of resonators, and a fluid...
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