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311results about "Room acoustics" patented technology
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Apparatus and method for control of a vehicle
An apparatus and method for transporting a payload over a surface is provided. A vehicle supports a payload with a support partially enclosed by an enclosure. Two laterally disposed ground-contacting elements are coupled to at least one of the enclosure or support. A motorized drive is coupled to the ground-contacting elements. A controller coupled to the drive governs the operation of the drive at least in response to the position of the center of gravity of the vehicle to dynamically control balancing of the vehicle.
Owner:SEGWAY INC
Apparatus and method for control of a vehicle
Owner:SEGWAY INC
Portable ventilator
ActiveUS7032589B2Speed up the flowReduce audible noiseExhaust apparatusBreathing masksPortable ventilatorsEngineering
A portable ventilator for providing an air-recipient with compulsory respiration is provided with an outlet manifold and a single-expansion-chamber muffler configured so that airflow through an inhale outlet port of the muffler is pulse-free and a transmission loss, defined as the ratio of sound power generated by the at least one compressor and incident on the muffler to the sound power transmitted by the muffler, is sufficient to deaden the sound power of the compressor.
Owner:THE JOHN HOPKINS UNIV SCHOOL OF MEDICINE
Polyester film for electrical insulation
InactiveUS6054224ALow densityReduce heatPower cables with screens/conductive layersInsulated cablesApparent densityPolyester
PCT No. PCT / JP97 / 02947 Sec. 371 Date May 6, 1999 Sec. 102(e) Date May 6, 1999 PCT Filed Aug. 25, 1997 PCT Pub. No. WO99 / 10417 PCT Pub. Date Mar. 4, 1999An electrical insulating polyester film has an apparent density of 1.37 to 0.85 g / cm3 and a tensile modulus of 2.0 to 4.5 GPa. A film having low oligomer content, low cost, high heat resistance, high impact resistance, superior machinability and processability, assembling stability, and superior visibility is obtained. Furthermore, leakage of current is reduced when it is used for motor insulation.
Owner:TORAY IND INC
Decorative interior sound absorbing panel
A multi-layered fiber reinforced thermoplastic sound absorbing panel includes a porous fiber reinforced thermoplastic core layer having a first surface and a second surface, and includes a thermoplastic material and from about 20 weight percent to about 80 weight percent fibers, a tie layer covering the second surface of the core layer and including a thermoplastic material, and a barrier layer covering the tie layer. The barrier layer includes a thermoplastic material having a melting temperature higher than the melting temperature of the core layer thermoplastic material. The tie layer bonds the barrier layer to the core layer. The panel also includes a non-woven layer including a fabric bonded to the barrier layer. The non-woven layer forms an outer surface of the panel.
Owner:HANWA AZDEL INC
Rigging system for speaker cabinets
InactiveUS7261180B1Improve sound qualityPromote sportsCandle holdersLighting support devicesEngineeringSound quality
A rigging system includes a lever arm permitting all speakers supported by the speaker whose rigging is adjusted to be angularly reoriented to focus the system, even out the coverage and fine tune the coverage. Multiple pivot attachment points for the moment arm are provided to enable an enhancement of the angular adjustment provided. A dozen or more angular positions can be provided for the lever arm to facilitate the trial-and-error method of optimizing the sound quality within the house.
Owner:ATLAS SOUND
Shear wave generator
InactiveUS6612397B2Enhanced couplingSeismic energy generationSeismology for water-covered areasSuction forceEngineering
A seismic shear wave generator comprising a seismic wave source (3) arranged on a base plate (11) arranged for being placed at the seabed, and a coupling device (1) arranged for coupling the wave source (3) mechanically to the seabed in order for shear waves to be transmitted to the seabed. The novelty of the invention is as follows: a cylindrical skirt (1) closely arranged along the base plate's (11) circumference and extending down from the underside of the base plate (11), and open downwards, and a pump device (2) arranged for pumping water respectably out of, and into, the skirt (1) and form vacuum or overpressure, respectively, in a closed cavity formed by the skirt (1) and the base plate (11) and the seabed (1) is lowered onto the seabed. By means of the device mentioned above the shear wave generator may be suctioned fixed to the sea bed and thus transfer shear waves via the skirt (1) to the seabed.
Owner:NORGES GEOTEKNISKE INST
Suction muffler for a hermetic refrigerant compressor
ActiveUS7316291B2Easy to manufacturePositive displacement pump componentsCombustion-air/fuel-air treatmentEngineeringRefrigerant
The invention concerns a suction muffler for a hermetic refrigerant compressor with a housing having an inlet and an outlet and limiting at least one muffling chamber, and a gas supply channel located in the muffling chamber between the inlet and the outlet. It is endeavoured to prevent too much oil from remaining in the refrigerant gas flow. For this purpose, the gas supply channel forms a throttling path and ends in the muffling chamber, and that in the area of the inlet of the gas supply channel an oil extraction opening is located, which ends in the muffling chamber.
Owner:DANFOSS COMPRESSORS +1
Acoustic panel
ActiveUS8960367B1Avoid multiple reflectionsSound proofingSound producing devicesEngineeringAcoustic wave
An acoustic panel for diffusing sound waves, the acoustic panel comprising: a panel front surface and a substantially opposed panel back surface; the panel front surface defining a plurality of front surface regions each delimited by a respective front surface region perimeter, each of the front surface regions being curved. The sound waves incoming at the panel front surface are diffused by the panel front surface.
Owner:LECLERC JEAN
Method, device and system for altering the reverberation time of a room
ActiveUS7905323B2Improvement factorReduction factorTransducer acoustic reaction preventionSound proofingResonanceEngineering
The invention relates to sound-absorbing devices, assemblies and systems and corresponding methods for altering the reverberation time of a room, specifically although not necessarily exclusively at low frequencies. A sound-absorbing device according to the invention comprises basically a body containing one or more cavities (4), where at least a portion of the outer surface of the body is in contact with said sound field S and where said body is inflatable / extendable and collapsible / compressible during the supply of a gas to or the removal of the gas from said at least one cavity (4), respectively, whereby the absorption coefficient (a) and / or the resonance frequency of said body can be varied, thus determining the absorption coefficient and / or the frequency region in which maximum absorption will take place.
Owner:LARSEN
Dynamically adjustable acoustic panel device, system and method
A dynamic passive acoustic panel device comprises an enclosure having a front opening, an absorbent panel of sound absorbent material mounted in the enclosure behind the front opening, and a reflective surface mounted in the front opening in front of the absorbent panel. The reflective surface comprises a tessellated array of reflective panels of matching shape arranged in a series of rows, each row being mounted for rotation about a central axis so as to vary the angle of inclination of the reflective panels in each row relative to the absorbent panel from zero degrees to ninety degrees to the absorbent panel, so as to vary the reflection and absorption characteristics of the panel device. A control system controls rotation of the rows of reflective panels, so as to vary the reflection and absorption levels between maximum reflection and maximum absorption based on desired acoustic properties of a space in which the panel device is located.
Owner:LUHTALA ERIK J
Wedge-shaped acoustic diffuser and method of installation
InactiveUS8607925B2Positively change the existing acoustics of a spaceIncrease effective bandwidthNoise reduction installationsCeilingsSound sourcesEngineering
A wedge-shaped, number theoretical acoustic diffuser both diffuses and reflects sound while eliminating wasted space created by prior art. The inventive diffuser consists of wells of continuously variable depths which provide wide-bandwidth diffusion in a single dimension. The back of the wells are reflective planes of a plurality of angles that direct energy away from the sound source. The invention may be installed in the upper corners of a room, with the deepest end of the wedge-shape up and tapering down to the thinnest end of the wedge shape. This installation allows floor standing furniture or other objects to be placed against the wall, an impossibility with the installation of prior art. The present invention may be installed as an array in which the deepest ends of the wedge shape are butted together. This formation splits and reflects sound in two different directions both away from the sound source.
Owner:GIDEONSE HENDRIK DAVID
Compressor discharge chamber with baffle plate
InactiveUS6976833B2Positive displacement pump componentsOscillating piston enginesCompressed fluidEngineering
Owner:CARRIER CORP
Method, device and system for altering the reverberation time of a room
ActiveUS20070140518A1Improvement factorReduction factorTransducer acoustic reaction preventionSound proofingResonanceEngineering
The invention relates to sound-absorbing devices, assemblies and systems and corresponding methods for altering the reverberation time of a room, specifically although not necessarily exclusively at low frequencies. A sound-absorbing device according to the invention comprises basically a body containing one or more cavities (4), where at least a portion of the outer surface of the body is in contact with said sound field S and where said body is inflatable / extendable and collapsible / compressible during the supply of a gas to or the removal of the gas from said at least one cavity (4), respectively, whereby the absorption coefficient (a) and / or the resonance frequency of said body can be varied, thus determining the absorption coefficient and / or the frequency region in which maximum absorption will take place.
Owner:LARSEN
Radio frequency shielded and acoustically insulated enclosure
InactiveUS7246681B2Efficiently employedAbsorb noiseScreening rooms/chambersCeilingsCouplingMetal sheet
A radio frequency (“RF”) shielded and acoustically isolated enclosure that efficiently employs multiple layers of sound insulation and absorbs airborne noise and the noise provided by magnetic resonance imaging (“MRI”) equipment through the supports of such equipment. The RF enclosure uses multiple layers and types of insulating materials positioned to maximize the noise absorption of the RF enclosure. This reduces the cost and space required by the enclosure. In one embodiment the enclosure includes a ceiling, a floor and a plurality of walls. The ceiling and walls include one or more multiple layers of different insulating materials that either abut each other or form air gaps. In one embodiment the floor includes a heavy metal plate on which the MRI equipment sits. The plate elastically couples to a conductive shield. The elastic coupling attenuates certain frequencies above the natural frequency of the metal sheet.
Owner:IMEDCO
Sound radiating structure, acoustic room and sound scattering method
InactiveUS6892856B2Increase the thickness of the structureImprove the scattering effectCeilingsSound proofingSound wave
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 with a closure. Each of the pipes also has a side opening in its one side portion. When a sound is input to the sound radiating structure, it re-radiates various sound waves through a number of the end and side openings together with reflected sound waves.
Owner:YAMAHA CORP
Vibration isolation apparatus for wine refrigerator
ActiveUS20050257554A1Positive displacement pump componentsSemiconductor/solid-state device detailsWine bottleEngineering
Disclosed is a vibration isolation apparatus for a wine refrigerator including a main body having a storage chamber and a mounting space, a base plate disposed at the mounting space of the main body with a predetermined interval from the main body, for forming the mechanical chamber with the mounting space, a compressor being installed on the top surface of the base plate, and an interval maintaining elastic support means coupled between the main body and the base plate, for maintaining a predetermined interval between the main body and the base plate, and elastically supporting the base plate. The vibration isolation apparatus for the wine refrigerator can store wines without deteriorating the special taste of the wines, by preventing the wine bottles stored in the wine refrigerator from being shaken in the operation of the wine refrigerator.
Owner:LG ELECTRONICS INC
Resistive suction muffler for refrigerant compressors
InactiveUS6840746B2Reduce sound levelWide frequency rangeExhaust apparatusPipe elementsAcoustic foamEngineering
Owner:BRISTOL COMPRESSORS INT
Active acoustics performance shell
An electroacoustic shell system adapted create a performance area where sound created by a performer is received, processed, and returned to the performer in the performance area. The system broadly includes an electroacoustic shell with a vertical panel and a canopy, a microphone and a speaker operably coupled to the shell, and an electronics processing assembly connected to the microphones and speakers for recording, broadcasting, and simulating sound.
Owner:WENGER CORP
System and method for workspace sound regulation
A system (and method) for workspace sound regulation, includes an office enclosure having a plurality of barriers, the barriers including reflective surfaces, and the reflective surfaces creating a plurality of preferred locations in the enclosure.
Owner:INT BUSINESS MASCH CORP
Noise reduction apparatus and method of making and using the same
A noise reduction apparatus can include a frame and multiple spaced apart panels positioned adjacent to each other. Each of the panels or only one of the spaced apart panel elements may have holes therein to receive acoustic waves for absorbing the waves between the panels. The panels can be attached to a frame or other connection structure so that the arrangement of panels can be hung over a work space or positioned in a work space (e.g. in a wall, formed as a partition or wall, included as part of shelving, etc.). The panels can also be incorporated into a light fixture that may hang from a ceiling or be attached to some other type of support (e.g. a table, a base, etc.). The panels can be composed of glass, wood, or other type of material.
Owner:KNOLL INC
Suction muffler for a refrigeration compressor
InactiveCN101171424AReduce noiseCompressorPositive displacement pump componentsRefrigeration compressorEngineering
A suction muffler for a refrigeration compressor, comprising a hollow body (10) defining at least one dampening chamber (13, 14) that carries a gas inlet duct (20) and a gas outlet duct (30) presenting an inlet opening (21,31) and an outlet opening (22, 32), for communicating the interior ant the exterior of the dampening chamber (13, 14), at least one of the gas inlet and gas outlet ducts (20, 30) presenting at least one closed end (23, 33), one of the inlet and outlet openings (21, 22, 31, 32) being positioned at a certain distance from said closed end (23, 33), smaller than the distance of said opening in relation to the other opening of the same duct (20, 30) and in a region of the latter presenting a minimum acoustic pressure for a determined frequency, the dimensioning of said duct (20, 30) and of the cross section of the first of said openings (21, 31; 22, 32) being achieved so as to minimize the gas pulsation noises inside the suction muffler.
Owner:WHIRPOOL SA
Acoustical baffle panel system
ActiveUS9920525B1Ease of assemblySolve the quick installationCeilingsSound proofingEngineeringAcoustic board
An acoustical baffle assembly comprising an elongated rigid upper carrier, a rigid panel supported on the carrier and a plurality of clips attaching the panel on the carrier at a plurality of locations along the length of the carrier, the clips each being clinched on an upper edge of the panel and being engaged with the carrier.
Owner:USG INTERIORS LLC
Movable acoustic shell assembly
Owner:HOLZMAN MOSS ARCHITECTURE
Compressor intake muffler and filter
ActiveUS8770341B2Positive displacement pump componentsCombustion-air/fuel-air treatmentBlow moldingProcess engineering
A muffler for a feed air system of a compressor assembly. The muffler can be a product of a blow molding process and used in a method of sound control for a compressor assembly. A method of controlling sound in a compressor assembly can have the step of providing a feed air and the step of providing the muffler an outlet in communication with an inlet of a pump assembly which can compress the feed air fed through the muffler and into the pump assembly. Sound control for a compressor assembly is also accomplished by adapting a feed air system to have sound control of a feed air path by dampening the sound emitted from a pump system through the feed air path.
Owner:BLACK & DECKER INC
Suction muffler for a reciprocating hermetic compressor
InactiveUS20050031461A1Rapid pressure equalizationLoss in volumetric efficiencyPositive displacement pump componentsPiston pumpsDifferential pressureMuffler
A suction muffler for a reciprocating hermetic compressor mounted inside a hermetic shell (1), said suction muffler comprising a hollow body (20) defining at least one acoustic chamber and provided with a gas inlet (22) connected to a suction line (9) by means of a tubular connector, and with a gas outlet (32) connected to a suction valve (8b) of the compressor, said equalizing chamber (60) being provided, on one side, with an opening (60a) to the interior of the hermetic shell (1) and, on the other side, with a fluid communication (61) with the acoustic chamber, said equalizing chamber (60) being dimensioned to minimize, simultaneously, the noises of the gas pulses inside the suction muffler, the mixture of said gas with that contained inside the hermetic shell (1), and the pressure differential between the interior of the latter and the suction line (9), upon operation of the compressor after a stop period.
Owner:EMBRACO IND DE COMPRESSORES E SOLUCOES EM REFRIGERACAO LTDA
Hybrid amplitude-phase grating diffusers
InactiveUS7428948B2Great reductionEfficient executionSound proofingSound producing devicesPhase gratingReflected waves
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 on a ternary sequence, which nominally has reflection coefficients of 0, −1 and +1. A method for obtaining the design sequence for Quaternary diffusers is also disclosed. Also, design methods for forming the sequences into arrays, and forming hemispherical diffusers are explained.
Owner:DANTONIO PETER
Discharge apparatus for reciprocating compressor
InactiveCN1444697APositive displacement pump componentsPiston pumpsReciprocating motionElectric machine
A discharge apparatus for a reciprocating compressor. The compressor includes a shell connected to a gas suction conduit for sucking gas, a cylinder in the shell, a compression unit including a piston performing reciprocal movement in the cylinder, a reciprocating motor having an inner stator, an outer stator, and a armature performing reciprocal movement between them, and a frame unit for supporting the compression unit and the reciprocating motor by connecting them. The discharge apparatus includes a first cover member in which a valve body controlling the discharge of compressed gas by switching the cylinder in contained and at least a gas passage is formed, and a second cover member arranged continuously with the first cover member and connected to the gas discharge hole. In this way, the gas compressed by linear reciprocal movement of the piston in the cylinder is discharged smoothly so the reliability of the compressor operation is improved.
Owner:LG ELECTRONICS INC
Hyperbaric oxygen therapy system controls
A hyperbaric oxygen therapy system includes a pressure vessel containing a gas, an oxygen concentration measurement apparatus for monitoring the concentration of oxygen in the gas, an environmental control apparatus for controlling the temperature of the gas in the vessel, and a pressure / ventilation control apparatus for controlling the pressure of the gas in the vessel. The pressure vessel is capable of accommodating a patient. The oxygen concentration measurement apparatus includes an oxygen concentration analyzer and a plurality of gas lines connecting the oxygen analyzer to the pressure vessel. The pressure / ventilation control apparatus includes a pressure controlling valve, a pressure sensor, a ventilation valve, and a controller having a programmable pressure profile. The environmental control apparatus includes a scrubber, a heat exchanger and a blower located within the pressure vessel. A compressor for the system includes a compressor silencer. An airlock providing access to the pressure vessel includes a safety mechanism.
Owner:OXYHEAL MEDICAL SYST INC
Structure of Discharging Refrigerant For Linear Compressor
ActiveUS20090081054A1Reduce pulsationSuppress noisePositive displacement pump componentsSilencing apparatusReciprocating motionLinear compressor
The present invention discloses a linear compressor in which a piston is linearly reciprocated inside a cylinder, for sicking a refrigerant into a compression space between the piston and the cylinder, and compressing and discharging the refrigerant, and especially, a structure of discharging the refrigerant for the linear compressor which can reduce a pulsation of a high pressure discharged refrigerant, by making the refrigerant compressed in the compression space flow from a sub-discharge space with a relatively small volume to a sub-discharge space with a relatively large volume in a discharge chamber. As a result, the structure of discharging the refrigerant for the linear compressor can efficiently reduce noise and vibration.
Owner:LG ELECTRONICS INC
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