18results about How to "Improve sound absorption" patented technology

This utility model discloses a petal-shaped sound-absorbing lamp, relating to the field of architectural decoration technology. It includes a lamp body and a sound-absorbing component. The sound-absorbing component is mounted on the lamp body and comprises a mounting frame and sound-absorbing blades. The mounting frame has slots around its circumference, and the sound-absorbing blades are connected to the mounting frame via these slots. All sound-absorbing blades are angled clockwise. A power cord perforation is located in the center of the mounting frame. By using a petal-shaped sound-absorbing component and a wire rope perforation along the circumference of the power cord perforation on the mounting frame, the surface area of ​​the sound-absorbing component is increased several times compared to traditional one-piece sound-absorbing components, significantly improving the lamp's sound absorption effect. Furthermore, the sound-absorbing blades of the component are installed using a plug-in method, allowing for easy adjustment of the surface area of ​​the sound-absorbing panels according to actual needs, enabling adjustment of noise reduction strength to meet different usage requirements and scenarios.

The application discloses a staggered and stacked wave-shaped sound barrier with a multilayer composite sound absorption structure and relates to the technical field of sound absorption equipment. The technical scheme is as follows: the sound barrier comprises an I-shaped stand column and a multilayer sound absorption assembly, the multilayer sound absorption assembly is arranged on one side of the I-shaped stand column, the multilayer sound absorption assembly is used for absorbing noise, the multilayer sound absorption assembly comprises a bottom plate, a side plate, an outer sound absorption plate and an inner sound absorption plate, recesses one and two are formed in the top surface of the bottom plate, recesses three and four are formed in the inner side of the side plate, the multilayer sound absorption assembly and the clamping and replacing assembly are used, the multilayer staggered sound absorption structure and the air layer can be used for more sufficient sound absorption, the inner sound absorption plate can be prevented from being blocked, and noise can be fully absorbed and reduced from multiple angles.

The application discloses a movable membrane-shaped metamaterial sound barrier, which comprises a thin film noise reduction unit and a structure fixing unit for arranging and fixing the thin film noise reduction unit, wherein the thin film noise reduction unit comprises a microporous membrane, a first cavity, a first sound insulation layer, a second cavity and a second sound insulation layer arranged along the sound wave propagation direction, and the microporous membrane is provided with a plurality of micropores for absorbing sound waves; when sound waves enter the first cavity through the microporous membrane, the micropores and the first cavity are used for preliminary noise reduction to reduce reflected sound generated by the sound waves; the sound energy of the transmitted sound waves is reduced through the first sound insulation layer and the second sound insulation layer; and the sound energy of the transmitted sound waves is further reduced through the second cavity. The application further provides an installation method. The sound barrier provided by the application is convenient to disassemble and assemble and has the effects of sound insulation and sound absorption, so that the noise pollution of construction equipment in a construction site can be effectively reduced.

The utility model provides a kind of road noise barrier based on sound-absorbing material, including barrier support assembly and barrier body, barrier support assembly includes the barrier support post of pair arrangement, and the sliding slot upper end of barrier support post is connected with buffer sliding block, and one barrier hanging pole is connected between buffer sliding block, barrier hanging pole is connected with barrier assembly support by hinged link, and barrier assembly support is connected with barrier body by bolt.The utility model in barrier body is converted into heat energy dissipation by the sound hole hole of sound hole board body, and the sound-absorbing micropore on microporous attraction cloth layer is based on micro-perforated plate theory, and the sound-absorbing coefficient is excellent in full frequency band, especially in low frequency part, further improve sound-absorbing effect, significantly improve the sound-absorbing performance of low frequency band by sound-absorbing cotton layer, and the porous structure of sound-absorbing cotton layer effectively insulates internal air convection and heat radiation, significantly reduce heat loss, while large aperture area absorbs and reflects sound wave, effectively reduce noise.

This utility model provides an aluminum profile structure for an assembly line with a silent guide rail, comprising: an aluminum profile body with rounded edges at the corners; a first mounting area and a second mounting area respectively located on the upper and lower parts of the aluminum profile body; protective baffles and a first sound-absorbing part on both sides of the top of the first mounting area to reduce noise generated by friction during contact. The aluminum profile structure for an assembly line with a silent guide rail provided by this utility model features rounded edges for enhanced safety; modular partitioning of the aluminum profile body into a first and second mounting area; and a silent guide rail assembly that works in conjunction with the first and second sound-absorbing parts to ensure smooth operation and prevent deviation. Simultaneously, multi-frequency noise reduction is achieved through elastic deformation and sound wave scattering, enhancing the sound absorption effect. Weight-reducing holes reduce weight while maintaining strength; and the first and second accessory mounting slots support external device expansion, forming a lightweight, low-noise, and highly adaptable silent assembly line system.

The utility model relates to a damping device technical field discloses a damping suspension base, including base body, be provided with the cavity in the base body, the cavity is equipped with first rubber damping layer and sound absorption cotton layer from top to bottom in succession in it. The utility model discloses a cavity is set up in the base body, and the sound absorption cotton is filled in the cavity to form the sound absorption cotton layer, compared to the sound absorption cotton is set up around the base body, when the sound absorption cotton is filled in the cavity of the base body, the sound absorption cotton can not be influenced by the dust of outside, humid air, makes sound absorption cotton can keep excellent sound absorption performance for a long time. And through the first rubber damping layer that sets up the sound absorption cotton layer in the cavity top, through the first rubber layer can absorb the vibration that produces when air conditioning compressor works, again cooperates sound absorption cotton layer to absorb the noise that penetrates into the base body downwards and blocks the noise and penetrates out suspension base, to make the damping effect of damping suspension base get greater promotion.

The utility model provides an integrated continuous anti-corrosion sound-insulation aluminum plate, which relates to the field of aluminum plates, and comprises an aluminum plate main body, the aluminum plate main body comprises a panel, a sound-insulation component and a back plate, the sound-insulation component is arranged between the panel and the back plate, the sound-insulation component comprises a frame, and the inner side of the frame is connected with a reinforcing rod; the upper side and the lower side of the reinforcing rod are connected with aluminum honeycomb core plates, mounting holes are formed in the aluminum honeycomb core plates, sound absorption cotton is arranged in the mounting holes, resin adhesive is arranged on the upper side and the lower side of the aluminum honeycomb core plates, a groove is formed in the back plate, a bottom plate is arranged on the outer side of the groove, and vertical reinforcing ribs and transverse reinforcing ribs are arranged on the inner wall of the bottom plate. The composite board has the effects of corrosion resistance, water resistance, fire resistance and sound insulation, and has the advantages of high mechanical strength and strong structural toughness.

This invention discloses a sound-absorbing component, a sound-generating device, and an electronic device, relating to the field of acoustics. The sound-absorbing component includes a housing and sound-absorbing material filled within the housing. The housing includes a main body and a cover, with the main body defining an accommodating space. The sound-absorbing material is filled within the accommodating space and includes at least one of sound-absorbing particles and sound-absorbing powder. The sound-absorbing particles include multiple sound-absorbing powders and an adhesive that binds the multiple sound-absorbing powders together. The main body is formed into a porous structure composed of stacked fiber filaments. The tensile strength of the main body is 10N-80N, and the elongation at break is 1-60%. The housing of this invention effectively encapsulates the sound-absorbing material, and the main body has good tensile strength and elongation at break, making it less prone to breakage. This solves the problem of dust contamination caused by exposed sound-absorbing material and provides excellent acoustic improvement performance.

The utility model relates to noise control technical field discloses a combined formula noise reduction sound absorber, through to the sound absorber unit structure periodic arrangement combination forms the sound absorption board with larger area, installs the sound absorption board on the indoor wall or the ceiling of gas power plant workshop, realizes the indoor low frequency broadband sound absorption noise reduction, the utility model discloses a first sound absorption subassembly, including first casing and the first microperforated panel of being located at first casing, first microperforated panel is located at first casing, second sound absorption subassembly, including second casing, the second microperforated panel of being located at second casing top and the second helmholtz resonance cavity of being located at first casing below, third sound absorption subassembly, including third casing, the third microperforated panel of being located at second casing top and multiple third helmholtz resonance cavities of being located at first casing below, first sound absorption subassembly, second sound absorption subassembly, third sound absorption subassembly combination forms the sound absorption unit, and periodically arranges distribution.

The utility model relates to vortex spinning machine field discloses a vortex spinning machine air intake noise reduction device, including the air intake cover for vortex spinning machine air intake noise reduction, the air intake cover's air outlet end is fixedly installed with the buffer pipe, the inboard of buffer pipe is equipped with stabilizing mechanism, the other end of buffer pipe is fixedly installed with the noise reduction cylinder, the inboard of noise reduction cylinder is equipped with the noise reduction mechanism, the outside of noise reduction cylinder is fixedly equipped with the sound insulation shell. The utility model has the advantages and effects that: can intercept the impurity dust in the airflow while air intake, prevent its into the equipment, pollute the yarn while producing the noise, guarantee the clean of equipment internal environment, and can make the airflow more uniform and stable, reduce the pulse and fluctuation of airflow, reduce the generation of noise, increase the practicability of equipment, utilize the noise reduction mechanism better match the propagation characteristic of sound wave, improve the sound absorption effect.

This invention belongs to the field of acoustic materials technology and discloses a sound-absorbing material and its preparation method. The sound-absorbing material includes a core layer and a surface layer; the core layer comprises a composite material formed by intercalating meltblown ultrafine fibers with hollow elastic short fibers; the surface layer has two layers, which are respectively applied to opposite sides of the core layer, and each surface layer comprises a flash-evaporated nonwoven fabric, forming a three-layer structure with the core layer. In the sound-absorbing material provided by this invention, the waterproof and breathable properties, as well as the good mechanical and protective properties of the flash-evaporated nonwoven fabric, are utilized to improve the performance defects of short-fiber intercalated meltblown nonwoven sound-absorbing cotton, resulting in a sound-absorbing material with advantages such as waterproof and breathable properties, good sound absorption performance, high mechanical properties, and mildew resistance, thus improving the service life of the sound-absorbing material.

Embodiments of the present specification provide an acoustic device, comprising: a diaphragm; a housing for accommodating the diaphragm and forming a first acoustic cavity and a second acoustic cavity corresponding to front and back sides of the diaphragm respectively, wherein the diaphragm radiates sound to the first acoustic cavity and the second acoustic cavity respectively, and conducts sound out through a first acoustic hole coupled with the first acoustic cavity and a second acoustic hole coupled with the second acoustic cavity respectively; and an acoustic absorption structure coupled with the second acoustic cavity, for absorbing sound in a target frequency range transmitted to the second acoustic hole via the second acoustic cavity, wherein the target frequency range includes a resonance frequency of the second acoustic cavity.

The utility model provides a sound insulation louver and sound insulation louvre, sound insulation louver includes parallelly arranged upper blade, lower blade and fills in the sound absorption material between upper blade and lower blade, is provided with fire -retardant waterproof cloth between sound absorption material and lower blade, the both ends of upper blade and lower blade are connected with each other, and a plurality of sound absorption holes are penetrated in lower blade. The utility model discloses through the above -mentioned structure, through the double -deck structure of upper blade, lower blade can increase the loss when the sound transmission in sound insulation louver, plays the effect of sound insulation, and sound absorption material can absorb the sound in upper blade, lower blade, to further improve the effect of sound insulation, through the sound absorption hole of lower blade can further improve the sound penetration lower blade and reach sound absorption material, to improve the effect of silence, the fire -retardant waterproof cloth of setting in sound insulation louver can effectively improve the fire -retardant heat -proof performance of sound insulation louver and prevent water and pass through sound absorption hole and enter sound absorption material in, to guarantee the sound absorption effect of sound absorption material.

This utility model discloses a prefabricated moisture-proof and sound-absorbing ceiling, which includes a series of arc-shaped sound absorbers. The arc-shaped sound absorbers are connected to the top beam or floor slab via stainless steel hangers. The arc-shaped sound absorbers include three types: an upwardly concave sound absorber, a first downwardly convex sound absorber, and a second downwardly convex sound absorber. Each upwardly concave sound absorber is adjacent to a first downwardly convex sound absorber and a second downwardly convex sound absorber on both sides, forming an overall wave shape. Each arc-shaped sound absorber includes sound-absorbing cotton, a moisture-proof cloth, and an aluminum plate. This utility model offers excellent moisture and corrosion resistance, good sound absorption, strong structural integrity, and convenient construction.

This invention relates to the field of automotive interior technology, specifically disclosing an environmentally friendly, high-strength automotive headliner. From bottom to top, it comprises: a non-woven fabric layer, a first adhesive layer cast on the surface of the non-woven fabric layer, a first toughening fiber felt bonded to the surface of the first adhesive layer, a second adhesive layer cast on the surface of the first toughening fiber felt, a polyurethane substrate bonded to the surface of the second adhesive layer, a third adhesive layer cast on the surface of the polyurethane substrate, a second toughening fiber felt bonded to the surface of the third adhesive layer, and a fourth adhesive layer cast on the surface of the second toughening fiber felt. Both the first and second toughening fiber felts are made of toughening fibers. The first, second, third, and fourth adhesive layers are all made of composite ethylene-vinyl acetate copolymer. The multi-layered structure of this automotive headliner features tight adhesion, preventing interlayer separation, good external rigidity, and no deformation. It also exhibits excellent sound absorption performance, is odorless, and is safe and environmentally friendly.

The utility model discloses a kind of polyacrylonitrile (PAN) base carbon fiber composite felt, comprising: soft felt layer, reinforcing layer, adhesive layer;The upper and lower sides of the soft felt layer, at least one side is composited with reinforcing layer by adhesive layer.Mechanical strength and high-temperature resistance of the utility model in the polyacrylonitrile (PAN) base carbon fiber composite felt are improved by the composite of adhesive layer and reinforcing layer, and service life is prolonged.The smooth layer of surface treatment layer improves the pollution resistance of composite felt, and is suitable for use in harsh environment.