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Acoustics > Sound-modifying Means > Mechanical Vibration Attenuator

Mechanical Vibration Attenuator

Mechanical Vibration Attenuator patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

06/19/14 - 20140166391 - Attenuators, arrangements of attenuators, acoustic barriers and methods for constructing acoustic barriers
An arrangement comprising a plurality of attenuators for attenuating acoustic waves, each attenuator of the plurality of attenuators comprising: a first body defining a cavity therein and at least one open aperture extending across a portion of the first body, the first body being configured to attenuate acoustic waves over...

06/12/14 - 20140158457 - Coulomb frictional damping coated product
One variation may include a method of making frictional surfaces for products having coulomb friction damping are provided. The method may include coating a metallic member with a coating including friction material. The metallic member may be pressure rolled to achieve a desired coating thickness and or the metallic member...

04/03/14 - 20140090922 - Simplified modal attenuator
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...

03/13/14 - 20140069737 - Noise attenuation device and fluid coupling comprised thereof
Embodiments of a noise attenuation device comprise a plurality of stacked plates that form channels to reduce energy in a flow of working fluid that transits the noise attenuation device. In one embodiment, the stacked plates include plates having openings in different patterns. Orientation of the plates align the patterns...

03/06/14 - 20140060962 - Acoustic and vibrational energy absorption metamaterials
An acoustic/vibrational energy absorption metamaterial includes at least one enclosed planar frame with an elastic membrane attached having one or more rigid plates are attached. The rigid plates have asymmetric shapes, with a substantially straight edge at the attachment to said elastic membrane, so that the rigid plate establishes a...

02/20/14 - 20140048349 - Bracket assembly for an audio loudspeaker system
A bracket assembly for an audio system that includes a mounting bracket slidably connected to a sub-assembly for attaching first and second loudspeaker enclosures of an audio loudspeaker system. The sub-assembly includes a plurality of vibration isolators disposed between a lower mounting bracket and an upper mounting bracket. The mounting...

12/26/13 - 20130341119 - Structure with active acoustic openings
An acoustic structure that includes a septum having an acoustic opening which defines an open area that varies in response to changes in the velocity of noise-containing media passing through the acoustic opening. The septum includes a fixed portion and one or more movable flapper portions wherein the fixed portion...

12/12/13 - 20130327588 - Methods and apparatus for reducing noise in reinforced skin structures
Assemblies, methods, and an apparatus for damping vibrational energy induced to a reinforced skin structure are disclosed. The reinforced skin structure includes an outer wall and at least one stringer coupled to the outer wall. The method includes providing a damping apparatus that includes a stiffening member configured to adjust...

09/26/13 - 20130248281 - Speaker cabinet for electronic device
The present disclosure relates to a speaker cabinet for electronic device, which is disposed in an electronic device and comprises a cabinet body, two first fixing structures, two dampers, and two second fixing structures. The damper is disposed on two side surfaces of the cabinet body through the two first...

08/15/13 - 20130206499 - Insulator for audio and method for evaluating same
In a conventional hard material insulator, reproduced sound can be tuned with use of characteristics of the material; however, various types of acoustic materials have specific high frequency characteristics, and thus their acoustic effects lack versatility, require compatible audio devices, and change with environment, musical genre, etc. To address this,...

01/31/13 - 20130025961 - Phononic metamaterials for vibration isolation and focusing of elastic waves
A methodology for designing structured metamaterials that can reflect, absorb and focus the propagation of both scalar acoustic and vector elastic waves is described. Three exemplary representative inventions based on the disclosed invention are described, illustrating i) compact ultra-wide broadband isolation, ii) sub-wavelength gaps and negative index propagation utilizing a...

12/27/12 - 20120325577 - Noise and vibration mitigating mat
A noise and vibration mitigating mat having top and bottom surfaces comprises a first layer formed of recycled bound rubber product, the first layer having a contoured bottom surface and a generally flat top surface, a second layer on the top surface of the first layer, the second layer being...

11/22/12 - 20120292125 - Door module having an acoustic uncoupling means
A door module of a vehicle door is provided. The door module comprising a carrier plate, a drive unit arranged on the carrier plate for driving a power-operated adjustment device of the door module, and a decoupling means arranged on the carrier plate for attenuating an acoustic excitation of the...

05/10/12 - 20120111661 - Panel mounting structure with sound reduction member
A panel mounting structure for a vehicle is provided having a substrate; a panel; and a separable sound reduction member disposed between the panel and the substrate and being configured to separate into at least two pieces that each remain in substantially fixed relation to a different one of the...

03/15/12 - 20120061176 - Apparatus and method for providing acoustic metamaterial
A method for fabricating an acoustic metamaterial may include providing a planar pattern of springs arranged in columns and rows and separated from each other by interconnection nodes, providing a planar pattern of mass units separated from each other by a distance corresponding to a distance between the interconnection nodes,...

10/13/11 - 20110247892 - Noise reducing device for timing chain of diesel engine
The present invention has a guide preventing radial vibration of a high-pressure pump sprocket engaged with a timing chain to transmit rotational power to from the timing chain to a high-pressure pump driving shaft and a guide formed on a timing chain cover to interact with the guide, in order...

10/06/11 - 20110240402 - Unit with a sound isolation/vibration isolation structure, array employing the same, and method for fabricating the same
The disclosure provides a unit with a sound isolation/vibration isolation structure, an array employing the same, and a method for fabricating the same. The unit with a sound isolation/vibration isolation structure includes: a hollow frame surrounding an inside space; a film disposed within the inside space, vertically contacting an inside...

06/16/11 - 20110139539 - Structure for reducing acoustic load
Provided is a structure for reducing an acoustic load. The structure includes a tape structure. The tape structure includes an attachment part configured to be attached to a substrate, and an off-position part spaced apart from the substrate and having at least one ventilation hole. Therefore, owing to the resilience...

09/16/10 - 20100230202 - Automated placement of vibration damping materials
Damping material is installed on a structure by moving a material placement head over the structure, and using the head to place the material on the structure....

09/16/10 - 20100230203 - Energy absorbing thermoplastic elastomer
The present invention relates to a method for vibration damping and noise reduction by using thermoplastic vulcanizate compositions and to multilayer structures for use in vibration damping and noise reduction applications comprising at least one polymeric layer made of a thermoplastic vulcanizate composition....

08/19/10 - 20100206661 - Acoustic waveguide vibration damping
An acoustic waveguide with at least two portions coupled by vibration damping structure. The vibration damping structure may be a conformable material such as closed cell foam. The vibration damping structure may further include structure for inhibiting motion in a direction transverse to the interface between the vibration damping structure...

08/19/10 - 20100206662 - Vibration damping sheet
Disclosed is a vibration damping sheet (1) comprising a viscoelastic layer (2) containing a hollow inorganic fine particle, and a constraining layer (3) arranged on the viscoelastic layer (2)....

06/10/10 - 20100140013 - Multilayer board for reducing solid-borne sound
A multilayer board for reducing solid-borne sound radiation with improved mechanical stability when subjected to a load, comprising a first cover layer, a second cover layer, and at least one core layer, wherein the at least one core layer is arranged between the first and the second cover layer, and...

06/03/10 - 20100133037 - Glazing unit with improved vibro-acoustic damping properties, method for making such glazing unit and method for acoustic protection in a vehicle passenger compartment
A glazing unit with improved vibro-acoustic damping properties, including at least one glass sheet and at least one vibro-acoustic damping strip fastened onto at least one of faces of the glass sheet and that includes at least one element made of damping material having a loss factor of at least...

05/27/10 - 20100126796 - Chromate-free resin-composite vibration deadening material
Disclosed is a chromate-free resin composite damping material having a multilayer structure wherein a viscoelastic resin composition is interposed, as an intermediate layer, between metal plates. This chromate-free resin composite damping material is characterized in that (i) the viscoelastic resin composition is a thermosetting resin composed of an amorphous copolymerized...

05/13/10 - 20100116584 - Noise attenuator for side wall panel
A noise attenuator for attaching a side wall panel to a frame that is exposed to vibratory loads and which includes a rigid core having a sleeve with two radially disposed end plates. A bracket encircles a portion of said sleeve between the end plates and is in non-contiguous relationship...

11/19/09 - 20090283356 - Solid-borne sound reducing structure
There is provided a solid-borne sound reducing structure (100) in which a surface plate part (1) including a gas ventilating part (1a) which allows gas to pass through along a thickness direction is disposed by means of an outer peripheral wall part (2) on a structure (200) that radiates noise...

11/19/09 - 20090283357 - Adjustable tubular nvh damper and torsion absorber
Respectively tapered and threaded pipe ends are rotated respective to each other to connect the pipe ends and progressively compress a yieldable damper sleeve therebetween as the pipes are rotated. NVH and torsional forces from one pipe end to another are suppressed....

10/01/09 - 20090242322 - Damper and fixing device using the same
The invention discloses a damper including a damping portion, a first pillar-shaped portion, a second pillar-shaped portion and a first block portion. The damping portion has a first end and a second end. The first pillar-shaped portion protrudes from the first end of the damping portion, and the second pillar-shaped...

07/30/09 - 20090188746 - Vibration damping material
The invention provides a vibration damping material excellent in vibration damping property and lightness, and in particular, a vibration damping material which can be preferably used for cars required to be light. In the vibration damping material of the invention, a foamed adhesive layer is integrally laminated onto one of...

02/26/09 - 20090050402 - Noise suppression structure
In a noise suppression structure of the present invention, a sound absorption sheet is pinched between a flange of a speaker grille and an interior trim. An opening of a space formed by the flange of the speaker grille and a sound guiding tube is covered with the sound absorption...