Matches 151 - 200 out of 338 < 1 2 3 4 5 6 7 >
Match Document Document Title
5493081 Panel that absorbs acoustic energy at low, medium and high frequencies, particularly at frequencies ranging from 400 Hz to 5,000 Hz  
A panel absorbing acoustical energy at low, medium and high frequencies, particularly at frequencies ranging from 400 Hz to 5,000 Hz, is essentially constituted by a plate (1) of semi-rigid foam...
5491310 Acoustic board  
An acoustic board including a front panel formed with a plurality of large openings and small openings, a rear panel having a distance from the front panel, an intermediate panel fitted between the...
5484970 Acoustic insulator  
Disclosed is a novel acoustic insulator constituted by a shaped article obtained by adding a binder to shreds of a plastic coated with a magnetic material, such as a magnetic tape or magnetic sheet...
5473125 Vibration-insulating panel element  
A panel element for insulating acoustically undesirable vibrations is disclosed. The panel element comprises a closed-cell foam element for closing off a hollow body provided with an opening on at...
5459291 Sound absorption laminate  
A sound absorption laminate comprises a porous insulation substrate, such as, a thermoplastic glass or polymeric fiber blanket or a foamed polymeric resin sheet and a facing sheet with a high air...
5438171 Composite sound wall  
A sound absorbing device for use as a sound barrier. The device includes at least one elongated tubular member of fiber reinforced, thermosetting resin formed by pultrusion and having a hollow...
5426267 Highway and airport sound barriers  
An elongated outdoor acoustic barrier for erection along a roadway or the periphery of an airport, for reflecting and absorbing sounds emanating from the roadway or airport, includes a plurality of...
5424497 Sound absorbing wall panel  
A movable, prefabricated wall panel having a rigid rectangular frame, a septum core disposed within the region bounded and confined by the frame, and adjacent layers of fibrous sound absorbing...
5401921 Two-dimensional primitive root diffusor  
A two-dimensional primitive root diffusor includes a two-dimensional pattern of wells, the depths of which are determined through operation of primitive root sequence theory. A prime number N is...
5396855 Underwater vehicle tailcone assembly  
There is presented an underwater vehicle tailcone assembly including a ford flange, a first tubular sheath extending rearwardly from the forward flange, and elastomer material bonded to inner and...
5394786 Acoustic/shock wave attenuating assembly  
An acoustic/shock wave attenuating assembly comprised of porous screens forms an enclosure filled with a suitable pressure wave attenuating medium or material having fluid characteristics. This...
5334806 Temperature and sound insulated panel assembly  
The present invention is a thermal and acoustical insulation wall panel assembly that incorporates a synthetic vinyl. This panel assembly reduces the amount of hazardous waste and the cost of...
5317113 Anechoic structural elements and chamber  
A substantially enclosed sound absorbing unit for an anechoic chamber is disclosed. The sound absorbing unit includes a substantially flat panel member comprising a layer of sound absorptive...
5286929 Sound absorbing materials  
A sound absorbing material comprises a fiber gathered body containing at least 50% by weight of synthetic fiber staples and having a mean density of 0.02-0.2 g/cm 3 , in which at least 30% by...
5266245 Methods for applying acoustic coverings to surfaces of a marine vessel  
Methods for applying coverings to surfaces by casting at least a portion of the covering in a mould from a solidifiable liquid mix. The mould may be applied directly to the surface or to an already...
5266374 Carpet construction providing noise suppression  
A plurality of small blocks are disposed between an upper flexible layer and a more rigid and thicker layer. The blocks prevent the compression of portions of the carpet surrounding the area on...
5250764 Consecutive plate acoustic suppressor apparatus and methods  
An apparatus and method for suppressing acoustic noise utilizes consecutive plates, closely spaced to each other so as to exploit dissipation associated with sound propagation in narrow channels to...
5241512 Acoustic protection material and apparatus including such material  
Material for providing acoustic protection against a source of noise, the material comprising a substrate and resonators, wherein said resonators formed on the substrate are constituted by...
5226267 Acoustical diffusing and absorbing cinder blocks  
Disclosed are a variety of structural acoustical cinder blocks including locking blocks which are intended to be assembled together through the use of mortar to provide a diffusor of desired shape...
5175401 Segmented resistance acoustic attenuating liner  
An acoustic attenuating liner has a non-metallic honeycomb core bonded on a backsheet. A corrosion-insulated perforated sheet is bonded to the honeycomb core by adhesive between the perforated...
5168130 Noise reducing apparatus  
A noise reducing apparatus comprising a first passageway group consisting of a plurality of first passageways aligned in parallel with each other for forming a first flat wave A by sound waves...
5160816 Two dimensional sound diffusor  
A two-dimensional sound diffusor is composed of a plurality of wells defined by a matrix of projecting elements. The wells, which have different depths and widths, are arranged in a repeating...
5154953 Composite glazing panel  
A glazing panel and hollow glazing panel, the hollow glazing panel including a first pane, a second pane held in spaced-apart, face-to-face relationship with the first pane, and a plurality of...
5138588 Underwater sound attenuator  
An apparatus for preventing the transmission of sound in an underwater medium. A resilient housing encloses at least two voids. A first void contains a compliant tube consisting of two T-shaped...
5137111 Acoustic absorber, and method of manufacture thereof  
A sound absorber has a column shape defined by a hollow, substantially cylindrical wire frame with a filler of uniformly distributed fused parallel filaments having high surface area to mass ratio,...
5125475 Acoustic construction panel  
An acoustic construction panel for use in the construction of walls, floors, or ceiling structures to improve the acoustical properties thereof, and a method of making that panel. The panel...
5057176 Method of forming corrugated paperboard automotive liner  
An automotive headliner comprised of a laminate of double corrugated paperboard. Perforations in all the sheets of the laminate except the back paperboard sheet improve the acoustical performance...
5027920 Cinder block modular diffusor  
The present invention relates to an acoustical diffusor device which is made up of a plurality of specially designed and shaped cinder or concrete blocks which may be assembled together through the...
5025888 Acoustic liner  
An acoustic liner comprising a sound permeable inside plate forming a first closed annulus, and a sound impermeable outside plate forming a second closed annulus located outside of and extending...
5024288 Sound attenuation apparatus  
Apparatus for reducing acoustic transmission from mechanical or acoustic sources by means of a double wall partition, within which an acoustic pressure field is generated by at least one secondary...
4989688 Acoustical wall panel and method of assembly  
A movable, prefabricated wall panel having a rigid frame. Internal to the rigid frame is a structural acoustical core, consisting of a grid with a plurality of individual cells, each filled with...
4949317 Compliant underwater acoustic baffle  
An improved acoustic baffle for use with underwater hydrophone or acoustic transducer equipment on submarines and the like for attenuating acoustic energy of a noise character emanating from the...
4947958 Sound attenuating laminate installation for jet aircraft engines  
The present invention relates to a novel installation of a sound attenuating laminate. More particularly, the invention relates to the installation of a simpler, lighter, and more effective noise...
4944362 Closed cavity noise suppressor  
An annular acoustic liner for gas turbine engine ducts comprising Helmholtz resonator chambers wherein the resonator's turnable neck length and chamber depth lie on a surface which is concentric to...
4926963 Sound attenuating laminate for jet aircraft engines  
The present invention relates to a novel sound attenuating laminate. More particularly, the invention relates to a simpler, lighter, and more effective noise attenuating laminate which is made up...
4911062 Impact tolerant material  
A material 11 is protected from acoustic shock waves generated by impacting projectiles by means of a backing 12. Backing 12 has an acoustic impedance that efficiently couples the acoustic energy...
4883143 Anechoic coating for acoustic waves  
To manufacture an anechoic coating which prevents a wall from reflecting acoustic waves, the wall is coated with an elastic material of low compressibility, which is highly absorbent under shear...
4867271 Acoustic insulation board consisting of foam  
An acoustic insulating board of foam with structured bulge-forming surface in the form of regions (I, II) of different thickness. In order to obtain differing acoustic efficiency, the acoustic...
4858721 Acoustic panel for sound insulating linings of gas ducts  
A sound insulating lining for a gas flow path, particularly the bypass flow ath in a jet engine, is made up of a succession of acoustic panels including a perforated skin bonded to a stiffening...
4848514 Sound attenuation system for jet aircraft engines  
The present invention relates to a novel sound attenuating system. More particularly, the invention relates to a simpler, lighter, and more effective noise attenuating laminate which is made up of...
4838380 Nylon impression fabric-acoustical application  
Nylon impression fabric is used as a cover fabric for an acoustical material (e.g., 1 inch thick polyester foam) substrate in an environment--such as a textile workplace environment having textile...
4832147 Sound reduction membrane  
A volumetric sound absorber for audible sound frequencies is made from a thin sheet material that is permeable to air with thickness mass, and flow resistance within specified ranges.
4832152 Acoustic tile  
An acoustic tile that provides soundproofing in a modular wall, such as is used in a modular panel office system, comprises a rigid rectangular metallic frame, a septum formed of a calcium...
4830140 Perforated sound absorbing panel  
A perforated panel having a thickness of at least about 6 mm, for use as a sound absorbing element, especially at lacunarias. Each perforation is covered by a thin fiber cloth which is bonded to...
4828175 Snow-making machine  
The apparatus for making artificial snow by atomizing water comprises a ductlike housing mounted on a supporting frame, in which a blower is positioned and on whose downstream end a plurality of...
4825974 Adhesive insulation system  
The invention relates to an adhesive insulating system (3) that is non-destructively removable, e.g. for repair purposes, for sound insulation of partition walls (1), particularly in motor...
4821839 Sound absorbing diffusor  
Disclosed herein is an improved sound absorbing diffusor device wherein the surface designed to face the sound source includes a plurality of sound absorbing wells of equal widths but different...
4821841 Sound absorbing structures  
The instant invention involves a sound absorbing structure which is formed from at least two adjacent panels which are assembled so as to provide a narrow slot of between about 1/16 and 3/4 inch...
4817757 Wall covering for absorbing sound waves in a liquid medium  
The covering is immersed in water (2). A viscoelastic substance (4) is disposed in ducts formed by rigid auxiliary walls (5) fixed to the base wall (1). The ends of these ducts (6) contain air. The...
4817756 Quiet nacelle system and hush kit  
A quiet nacelle system for jet aircraft engines includes a nose cowl and nose dome having a sound-attenuating liner, a concentric ring between the nose cowl and nose dome, and fan duct components...
Matches 151 - 200 out of 338 < 1 2 3 4 5 6 7 >