123results about How to "Reduce sound energy" patented technology

Acoustic shielding system and method for protecting and shielding non-targeted regions or tissues that are not intended to be treated by ultrasonic procedures from acoustic energy using a shield. In some embodiments, the shield comprises multiple layers made of one or more materials with one or more acoustic impedances. In some embodiments a multilayered shield includes materials with relatively different acoustic impedance levels. In some embodiments, the shield includes active components such as energy diversion devices, heating, cooling, monitoring, and/or sensing. In some embodiments, the shield is configured to protect an eye, mouth, nose or ear while allowing the ultrasound to treat the surrounding tissue. One embodiment of an eye shield is configured to fit under at least one eyelid and over a portion of the eye.

An audio equivalent of a video zoom feature for video recording and communication applications, as well as video post production processes. The audio zoom may operate in conjunction with a video zoom feature or independently. The audio zoom may be achieved by controlling reverberation effects of a signal, controlling a gain of the signal, as well as controlling the width of a directional beam from which is used to select the particular audio component to focus on. The audio zoom may operate in response to user input, such as a user selection of a particular direction, or automatically based a current environment or other factors.

A method and system of achieving noise reduction in a kitchen environment is disclosed. Noise reduction is achieved through the application of transmission loss paneling, sound absorption paneling, and vibro-acoustical isolation paneling to surfaces of a kitchen environment surrounding typical kitchen appliances. Targeted, noise reduction of the kitchen environment is achieved by installing the noise reduction system of the present invention to walls, cabinetry and flooring of a typical kitchen environment.

Apparatus for the ultrasonic treatment of tissue, including: a housing having a space therewithin and an opening adapted for placement against the tissue, the housing being adapted for introducing liquid therein such that when so placed, the space is filled with liquid; and an ultrasonic power source that introduces ultrasonic vibrations toward the damaged tissue, said vibrations having a frequency and power level sufficient to produce cavitation of the liquid at or near the surface of the tissue.

Method and apparatus for controlling acoustic treatment of a sample including a liquid. A processing volume in which the sample is acoustically treated may be controlled, e.g., by positioning a suitable element so as to reduce and/or eliminate a headspace at a sample/gas interface. An interaction between the acoustic energy and the sample may be controlled, e.g., by using an energy director positioned at least partially in the sample that helps to reduce splashing or other sample ejection that would otherwise occur.

A water and acoustic barrier positionable between a vehicle trim piece and a vehicle body member includes a sheet having a first layer formed of an interpolymer material and a second sheet layer formed of a polyethylene material. A raised rib is formed about at least a portion of a sheet perimeter. The raised rib having an adhesive bead forms a seal between the sheet and the vehicle body member. A raised form positioned adjacent the raised rib but oppositely oriented from the raised rib acts to substantially equalize a sealing pressure along the length of the raised rib. A plurality of apertures define fastener attachment points to connect the barrier to the vehicle trim piece.

A cover plate for an optical disk drive designed to reduce disk vibrations and noise is provided. The cover plate is installed above a main frame of the optical disk drive and has a through hole in the center through which a disk clamp for clamping a disk placed on a turntable is fitted and a projection formed to oppose the disk up to a predetermined height in order to narrow a gap with the disk. Furthermore, the cover plate has a circular step formed opposite a surface corresponding to an outer circumference of the disk in the shape of an annular groove for lowering acoustic energy density of noise. The cover plate constructed in this way reduces disk vibration due to air damping effects resulting from a narrow gap between the disk and the cover plate while suppressing noise due to the presence of the abruptly expanded portion. Furthermore, the cover plate can be implemented without a separate device by making simple changes to the structure of cover plate.

The invention discloses a measurement system and a measurement method for jet noise of a water filling pipe. The measurement system comprises the water filling pipe, a reverberation box, a polymethyl methacrylate board and a hydrophone vertical line array. The reverberation box has a steel cuboid structure and is filled with water. The top end of the reverberation box is not provided with a cover, and the bottom is supported by a crossbeam. The polymethyl methacrylate board is mounted in the reverberation box and divides the reverberation box into two parts, namely a jet area and a testing area. The water filling pipe is placed at the jet area of the reverberation box. The hydrophone vertical line array is placed at the testing area in the reverberation box. The measurement system and the measurement method have advantages of reliably eliminating pipe wall radiation noise generated by factors such as water current impact of the water filling pipe or water pump vibration, eliminating flow noise which is generated by hydrophone motion in space averaging. The measurement method for jet noise of the water filling pipe eliminates the effect of a dummy sound caused by water current impact on the hydrophone in measuring the jet noise by a free field. Advantages of a reverberation method are used, thereby reducing workload in measuring the radiation sound power of the jet noise of the water filling pipe by the free field.

The present invention discloses an intestinal tract pushing apparatus for ultrasonic therapy. The intestinal tract pushing apparatus includes a pushing member and an acoustically transparent member. One end of said acoustically transparent member is connected to a buckling strip, and the other end of the acoustically transparent member is connected to an adhesive strip. The acoustically transparent member is bound to the human abdomen by virtue of the adhesive fastening of the buckling strip and the adhesive strip. The pushing member employs a hydraulic system.

The invention discloses a silencer. The silencer comprises a hollow cavity defined by a first bottom surface, a second bottom surface and a side wall; the side wall is connected with the first bottomsurface and the second bottom surface; a gas inlet is formed in one end of the silencer, and a gas outlet is formed in the other opposite end of the silencer; the cavity is divided into a plurality ofchambers in the axial direction; the chambers include the first chamber adjacent to the first bottom surface, the second chamber adjacent to the second bottom surface and the middle chamber located between the first chamber and the second chamber; the gas inlet communicates with gas of the middle chamber; the middle chamber communicates with gas of the second chamber; the first chamber communicates with gas of the second chamber; and the gas outlet communicates with gas of the first chamber.

A fuel cell automobile is provided with a fuel cell and an integral module including a drive module, a compression module, and an intercooler. At least one portion of the integral module is mounted to a body of the automobile by way of a mount. Further, a compressed air cooled using the intercooler is supplied to the fuel cell by way of a pipe at least portion of which is made of a resilient member.

A method for designing tires for reduced cavity noise is directed to tires of the type having architectural elements comprising at least one carcass structure anchored in each side of the tire in a bead, each bead having a base which is intended to be mounted on the tire's design mounting rim, a side wall portion extending radially upward from each bead, a reinforced summit comprising reinforcement cords disposed at a given angle, and the side wall portions joining the summit. The method includes the step of arranging the architectural elements to provide a flexibility level of at least a portion of the summit to allow said portion to vibrate at a frequency substantially corresponding to the cavity mode.

An acoustically treated exhaust centerbody comprising a body including a body fore portion and a body aft portion. An internal passageway extends through the body in the axial direction. A resonator in the body fore portion includes a plurality of acoustic chambers. A plurality of ribs in the resonator form fore/aft walls of the acoustic chambers. Each rib is shaped substantially as a section of an annulus. A plurality of radial fins extend between adjacent ribs. The fins form sidewalls of the acoustic chambers. A skin overlies the acoustic chambers and forms an outer surface of the resonator.

The invention provides an MEMS microphone and a formation method thereof. The MEMS microphone comprises a first wafer, where a conductive pole plate is formed; first support portions arranged around the conductive pole plate; first diaphragms lying across the first support portions respectively, wherein a gap is arranged between the conductive pole plate and the first diaphragms as well as the first support portions respectively, and the first support portions are conductive; at least one layer of second diaphragms arranged on the first diaphragms respectively, second support portions being arranged between the first diaphragms and the adjacent diaphragms in the second diaphragms respectively, the second support portions being conductive; a plurality of first through holes arranged in each second diaphragm; and a second wafer, the back surface of which is provided with a groove. The groove side wall is corresponding to the position of a second area, and the groove is corresponding to the position of a first area; a plurality of sound holes are formed in the bottom surface of the groove; in the position of the second area, the groove side wall is bonded with the front surface of the first wafer; and a gap is arranged between the bottom surface of the groove and the top-layer second diaphragm. The first through holes can diverge sound to enable damage to the first diaphragms and second diaphragms to be reduced.

The invention discloses a sound attenuation structure of a vacuum pump. The vacuum pump comprises a pump assembly and a pump containing cavity used for containing the pump assembly. The sound attenuation structure comprises sleeve-like parts. The sleeve-like parts are mounted in the p ump containing cavity. The internal space of the pump containing cavity is divided into a first space and a second space. A gas outlet of the pump assembly is located in the first space. An exhaust port of the pump containing cavity is located in the second space. The sidewalls of the sleeve-like parts are provided with through holes for communicating the first space with the second space. As the through holes are quite small relative to the volume of the second space, the second space and the through holes form a resistance sound attenuation structure. Sound waves are propagated in the resistance sound attenuation structure to generate reflection and interference so that sound energy can be reduced, and the purpose of sound attenuation can be achieved. Accordingly, the sound attenuation structure of the vacuum pump can effectively lower noise of the vacuum pump. The invention further discloses the vacuum pump.

Column resonance sound of certain frequencies can effectively be reduced in a pneumatic tire by disposing a sound absorbing structure (1) in an interior of the pneumatic tire, where the sound absorbing structure (1) includes a sheet-like base material (2); a plurality of protrusions (10) made from a nonwoven fabric and projecting from a front surface (2a) of the base material (2); and a hollow portion (20) provided inside of the protrusions (10).

The invention provides a low-noise regulating valve comprising a valve body, a combined sleeve, a sleeve core, a valve core and a valve stem. The valve core is connected with the valve stem. The valve core can move up and down along the inner walls of the sleeve core and the combined sleeve. The low-noise regulating valve is characterized in that a valve seat is provided with the combined sleeve provided with a plurality of tapered holes, the inner wall of the combined sleeve fits the valve core, the upper end of the combined sleeve is fixed to through the sleeve core, and the lower end of the combined sleeve to the valve seat; the combined sleeve is composed of an elastic damping lower end cover, a lower slot, an outer sleeve, a middle sleeve, an inner sleeve, an upper slot and an elastic damping upper end cover; the elastic damping upper end cover and the elastic damping lower end cover are mounted in the upper and lower slots, respectively; the inner sleeve, the middle sleeve and the outer sleeve are mounted in the upper and lower slots sequentially from inside to outside; the inner sleeve, the middle sleeve and the outer sleeve are all provided with a plurality of tapered holes having a taper 1:10 to 1:1. A sound source of the combined sleeve is subjected to hexaploid noise reduction, a sound path of the upper and lower elastic damping end covers is subjected to noise reduction, and noise treatment is achieved for multiple parts of the regulating valve. The low-noise regulating valve is simple in structure, easy to change and convenient to use.

The invention discloses water-in-water type sound insulation multicolor paint. The water-in-water type sound insulation multicolor paint is formed through three phases including colloidal solution, pelletized base paint and emulsion finished paint. The colloidal solution comprises sodium pyrophosphate, lithium magnesium silicate and water; the pelletized base paint comprises polyethylene glycol, an anti-foaming agent, waterborne elastic polyurethane emulsion, colloidal solution, titanium dioxide, environment-friendly inorganic pigments, a thickening agent, a thermal insulation agent, a film coalescing aid and water; the emulsion finished paint comprises waterborne elastic polyurethane emulsion, propylene glycol, a sound absorption functional material, pelletized paint, carboxymethyl cellulose, a waterproof agent, an anti-corrosion agent and water. The invention further provides a preparation method of the multicolor paint. Once spray coating of the multicolor paint can be realized without adoption of organic solvents and various colors. In addition, the water-in-water type sound insulation multicolor paint has advantages of sound insulation, heat insulation, water resistance, pollution prevention, easiness for washing and scrubbing resistance and is available for arbitrary color matching to realize perfect patterning.