125 results about "Metal sound" patented technology

The invention relates to an assembled metal sound insulation chamber which is used for acoustic measurement of electronic, mechanical and medical products or used as a recording studio, an audiometric room, a laboratory or a control room. The assembled metal sound insulation chamber is characterized in that a sound insulation module and an H-shaped steel connector are inserted together to form a bottom panel; the sound insulation module or a sound insulation-sound absorption module and the H-shaped steel connector are inserted together to form vertical panels and a top panel; all panels compose a metal sound insulation chamber by the connecting and fixing of a C-shaped steel connector, an F-shaped steel, an angle steel and an angle post connector; when the vertical panel and the top panel are sound insulation modules, the internal surface of the sound insulation chamber is provided with a layer of metal sound-absorption module, a vibration isolator is arranged below the bottom panel; and a sound insulation door and a sound insulation window are arranged on the vertical panel and a ventilation muffler is arranged on the vertical panel or the top panel. Owning to the assembled structure, the assembled metal sound insulation chamber is convenient for production, transportation and assembly, has good effects for vibration isolation, sound insulation, ventilation and observation, beautiful appearance, firmness and durability, is environment-protective, has no smells, has the background noise less than 20dB and does not affect the acoustic characteristic after being re-assembled in different places.

The invention relates to a metal sound insulation low-frequency acoustical board, which has sound insulation and low-frequency sound absorption effects and can be widely applied in an acoustic room or anechoic chamber with low-frequency acoustic requirements. According to the absorption principle of resonance sound-absorbing materials and structures, resonance occurs when natural vibration frequency of resonance sound-absorbing materials and structures is consistent with frequency of sound wave, and the resonance sound-absorbing materials and structures can consume sound energy and plays a role in sound absorption when the resonance reaches the maximum amplitude. An elastic cushion, a sounding board and an elastic material are successively arranged between an internal surface metal perforated plate and an external surface steel plate which form the metal sound insulation low-frequency acoustical board provided by the invention, wherein the sounding board is composed of several nonmetal plates or metal sheets. An acoustic room prepared from the metal sound insulation low-frequency acoustical board has good low-frequency sound absorption characteristics. The inner wall of the acoustic room can be provided with a wedge absorber or flat sound absorber to form a low-frequency anechoic chamber, and the length of the wedge absorber can be shortened or the thickness of the flat sound absorber can be reduced so as to save land occupation and decrease cost of construction.

The invention discloses an interference-type optical fiber pick-up probe relating to a distributed interference-type optical fiber pick-up probe based on space division multiplexing. The pick-up probe comprises an optical fiber (11), an annular ceramic clamp (12), a vibration reflecting film (13), a metal sound transmission mesh screen (14) and a metal housing (15), wherein an inner wall of the annular ceramic clamp (12) is fixedly connected with a cladding of the optical fiber (11), an outer wall of the annular ceramic clamp (12) is fixed inside the metal housing (15), and an outer wall of the vibration reflecting film (13) and an outer wall of the metal sound transmission mesh screen (14) are also fixed inside the metal housing (15); and an end surface where the optical fiber (11) is incontact with the vibration reflecting film (13) is concave and matched with the contact area of the vibration reflecting film (13) to enlarge the contact area of the light and the vibration reflecting film (13).

The invention relates to a road surface supporting facility, in particular to a cement-based non-metal sound barrier unit plate. The unit plate comprises a sound absorption plate, a sound insulation plate and a sound absorption material arranged between the sound absorption plate and the sound insulation plate; the sound absorption plate is provided with a pipeline, the interior of the pipeline is hollow, and the sound insulation plate is provided with a convex block of which the shape is matched with that of the interior of the pipeline. When assembling is performed, the convex block on the sound insulation plate is directly inserted into the pipeline arranged on the sound absorption plate, the sound absorption material is clamped between the sound absorption plate and the sound insulation plate, tediousness of traditional screw fixing is omitted, better convenience, rapidness and firmness are achieved, and the loosing risk generated by using a binding agent or the screw is avoided.

The invention provides a non-metal sound barrier die, which comprises a plate body, wherein a layer of galvanized steel sheet is coated on the plate body, four right angles of the plate body are reinforced by angle steel, the two sides of the plate body are provided with side baffles, the two ends of the plate body are provided with end baffles, the outer sides of the end baffles are provided with limiting blocks, the plate body is fixedly provided with a plurality of rubber modules by rivets, the rubber modules are uniformly distributed on the plate body, one ends of the end baffles are female die aluminum section bars, the other ends of the end baffles are male die aluminum section bars, and the side baffles are respectively convex aluminum section bars and concave aluminum section bars which correspond to the female die aluminum section bars and the male die aluminum section bars at the two ends of the end baffles. Through fixing the rubber modules on the plate body through the rivets, the size and the quantity of the modules can be conveniently set according to the needs, and the use is very convenient. The non-metal sound barrier die is simple in manufacturing process, long in service life and low in cost, and the size of the die can be flexibly adjusted according to the design.

The invention discloses a nose-shaped metal sound barrier unit plate for a high-speed railway. The unit plate comprises an aluminium alloy face plate (1), an aluminium alloy back plate (9), a fiber cement plate (13) between the aluminium alloy face plate (1) and the aluminium alloy back plate (9), sound absorbing materials (14) and sound absorbing material fixing devices (16), wherein a nose-shaped bulge (2) protruding outwards is arranged in the middle-upper part of the aluminium alloy face plate (1); the slant part of the nose-shaped bulge (2) is arc-shaped; a transverse bottom (3) is provided with sound absorbing materials (15); and sound holes (4) are arranged on the bottom (3) of the nose-shaped bulge (2) and on the parts except the nose-shaped bulge (2), on the aluminium alloy face plate (1). The unit plate has a strong barrier effect on sounds and has a good noise reduction effect.

The invention discloses a sound absorption wall, which comprises an inner wall, alkali-free glass sound absorption cotton, metal acoustical boards and keels, wherein embedded elements are arranged in the inner wall; the keels are welded on the embedded elements; the metal acoustical boards are fixed on the keels through screw bolts and screw nuts; and a position between the inner wall and the metal acoustical boards is filled with the alkali-free glass sound absorption cotton. The metal acoustical board perforation rate of the sound absorption wall can reach 40 percent or above. Compared with the prior art, the sound absorption wall has the advantages that the sound absorption efficiency is greatly improved; the structural stability is very good; deformation is avoided; the service life is long; the metal sound absorption wall achieves a good fireproof effect, is nonflammable and has high sound absorption efficiency; the installing and fixing mode of the metal acoustical boards is simple; the single-piece fixation of the metal acoustical boards is realized; and the fixation of other metal acoustical boards cannot be influenced by the mounting or the dismounting of any one metal acoustical board.

The invention discloses a preparation method of a novel wood-plastic composite material capable of greatly improving the weather resistance. The preparation method comprises the following steps: uniformly mixing the thermoplastic plastics, wood fibers, high-temperature lubricating agent and high-temperature coupling agent according to a ratio to obtain a mixed material; and carbonizing granulating, carbonizing extruding, conventionally cooling, stretching and cutting to obtain the wood-plastic material, wherein the carbonizing granulating temperature and the carbonizing extruding temperature are 250 to 290 DEG C. The surface and sections of the wood-plastic composite material are black, have metal luster and have metal sound when being knocked; the heat expansion and cold shrinkage deformation is small, and the thermal deformation temperature is greatly increased; the moisture absorption performance is significantly reduced, the corrosion and decomposition are unlikely to occur, and the weather resistance is good; and the ultraviolet resistance is improved.

The invention relates to a main shaft anti-reversal device in a zipper teeth chain continuous making machine, which can prevent the reversal of a main shaft when the main shaft stops. A rotary body is arranged on the main shaft (30) which enables each device to work, a ratchet wheel (53) is arranged opposite to the rotary body in a non-rotational manner, the rotary body is provided with a pawl (54), the claw (54a) of the pawl (54) is fixedly clamped on a gear (53a) of the ratchet wheel (53) by a spring to prevent the reversal of the main shaft (30), the pawl (54) resists the spring (55) by the centrifugal force of the rotation of the rotary body to enable the claw (54a) to separate from the gear (53a) and prevent the damage and the abrasion of the claw (54a) when the main shaft (30) rotates, and metal sound can not be generated.

The invention discloses a light weight, high-strength and environmentally-friendly type nonmetallic sound barrier, and relates to the field of nonmetallic sound barriers. The light weight, high-strength and environmentally-friendly type nonmetallic sound barrier comprises a plurality of sound absorbing panels, a plurality of sound insulating panels and fixing devices. The fixing devices are standcolumns with vertical grooves, and are fixed on edges of a bridge deck or pavement, the sound barrier is formed by inserting the multiple sound absorbing panels and the multiple sound insulating panels between every two stand columns, the sound absorbing panels are micro-porous particle sound absorbing panels and are arranged on the side near a sound source, the sound insulating panels are concrete sound insulating panels and are arranged on the side far away from the sound source, and air separating cavities are reserved between the micro-porous particle sound absorbing panels and the concrete sound insulating barriers.

The invention relates to an aerogel-based composite aluminum fiber acoustic panel absorber and a preparation method of the aerogel-based composite aluminum fiber acoustic panel absorber, and belongs to the field of manufacturing of metal sound absorption materials. The aerogel-based composite aluminum fiber acoustic panel absorber comprises aluminum screen plates, aerogel-based fiber felts and an aluminum fiber felt, wherein the aerogel-based fiber felts are adhered on two sides of the aluminum fiber felt, and the aluminum screen plates are adhered on the outer sides of the aerogel-based fiber felts. Compared with the prior art, the method related in the invention is wide in application range, readily available in raw materials and low in cost, the manufactured aerogel-based aluminum fiber acoustic panel absorber has the advantages of simple process equipment, quick production speed, low cost, noninflammability, good mechanical properties, high strength, good toughness, impact resistance and capabilities of withstanding high-speed air flow, water-current scouring and the like, and is further of great significance on sound absorption fields of ship cabins, vehicle bodies, aircrafts, industrial workshop ceilings, mechanical vibration engines and the like.

The invention relates to a GFRC nonmetal sound barrier production line. The production line comprises a control system, a platform automatic conveying system, a material automatic distribution system,a distribution molding system, an automatic stacking conveying system, a maintaining system, an automatic demolding system and a platform shuttle bus automatic return system; and the production linecomprises the following steps of material distribution, release agent spraying, platform conveying, material distribution molding, neatening stacking, sound barrier maintaining, sucking disc demoldingand sound barrier finished product delivering. The GFRC nonmetal sound barrier production line is reasonable in structure design, assembly line operation is adopted for replacing the past manner thatmanual operation by a worker is completely adopted, the working environment of the worker is improved, the labor intensity of the worker is greatly reduced, the production cost is reduced, conversionof production from the manual manner to mechanization and intelligence is achieved; and the production efficiency is improved, the product quality is guaranteed, and the need of large-batch production of GFRC nonmetal sound barriers for high-speed trains is met.

The invention discloses a metal sound barrier for a bridge. The metal sound barrier comprises a foamed aluminum face plate, a foamed aluminum back plate and four galvanized steel plates on the side faces. The two ends of the foamed aluminum face plate are straight, and the middle of the foamed aluminum face plate is in an outward-protruding arc shape. The galvanized steel plates are compressed into sectional materials with the U-shaped sections. The foamed aluminum face plate, the foamed aluminum back plate and the galvanized steel plates are fixedly connected into the metal sound barrier with a cavity structure. The front face of the metal sound barrier is of an arc-shaped structure, so that the structural strength of the metal sound barrier is higher than that of a sound barrier with the same width; the metal sound barrier is provided with a hollow cavity, so that the overall weight is decreased; and the face plate and the back plate are made of foamed aluminum, so that the sound absorption effect is better, and the strength is guaranteed.

The invention provides a circular totally-closed sound barrier for a high-speed rail, which comprises a sound barrier foundation, a frame constructed on the sound barrier foundation to form opposite side closing and sound barrier assemblies formed in the frame, and is characterized in that the frame is a steel structure frame with an arc-shaped cross section, and two arc-shaped ends of the steel structure frame are arranged on the sound barrier foundation; the sound barrier assemblies are symmetrically located on the two sides of the circular totally-closed sound barrier for the high-speed rail, and the sound barrier assemblies located on the two sides are each sequentially provided with a lower arc-shaped metal sound barrier plate set, an arc-shaped transparent sound barrier plate set andan upper arc-shaped metal sound barrier plate set from bottom to top; and the arc-shaped metal sound barrier plate set comprises one or more arc-shaped metal sound barrier plates, the arc-shaped transparent sound barrier plate set comprises one or more arc-shaped transparent sound barrier plates, and every two adjacent barrier plates are connected through a connecting piece.

The invention discloses a boiling sounding buoy. The buoy is characterized by comprising a buoy handle, an outer isolation layer, a metal sound generator and a buoyancy unit. The buoy handle is arranged at the top end of the buoy, the metal sound generator is arranged in the buoy and is the source of sound, and the buoyancy unit is arranged at the bottom end of the buoy and is used for guaranteeing that the buoy is kept vertical. The buoy is simple in structure, economic and practical, capable of improving the cooking safety and worthy of being popularized.

The invention provides an anti-resonance metal sound box which includes a metal shell and a plastic part. The metal shell is of a ring wall structure which has openings on both sides and has a hollowinside. The plastic part is used for placing the internal components of the sound box. The metal shell surrounds the plastic part. The plastic part is fixedly connected with the metal shell. There isa sealing mouth at the joint of the plastic part and the metal shell. A sealed cavity is formed inside the metal shell and the plastic part. The resonance frequency points of the aluminum shell are changed and dispersed based on irregular and unequal wall thickness of the aluminum shell, which can eliminate noise and make the sound purer. The internal plastic part is formed through flexible-rigiddouble-color injection molding. The shape of the flexible glue is consistent with the shape of the contact surface of the aluminum shell. After the plastic part is assembled together with the aluminumshell, a sealed cavity is formed, which can prevent leakage. Therefore, good air tightness is ensured, and the sound is clearer.

The invention provides a composite noise reduction board and a noise reduction device. The composite noise reduction board comprises a noise absorption layer and a metal sound insulation layer. The sound absorption layer is provided with sound absorption apertures, and the cross section of the metal sound insulation layer has a C-shaped structure. The sound absorption layer is disposed in the C-shaped structure of the metal sound insulation layer in a composite way. The metal sound insulation layer with / having the C-shaped structure is used to insulate sounds from a noise source, and the sound absorption layer having the sound absorption apertures disposed in the C-shaped structure of the metal sound insulation layer is used to absorb the noises, and then the high-efficiency sound-absorption noise reduction processing of the noise source is realized, and therefore the composite noise reduction board has advantages of concise structure, economy, environmental protection, wide application range, and ability of facilitating assembly.

The present invention relates to an improvement method for a low noise structure and a sound absorbing structure of an indoor substation. The method visualizes and quantifies an external sound field of a power transformer through acoustic radiation characteristics analysis, combines acoustic radiation characteristics of the power transformer with feedback information between design departments toimprove and optimize an overall layout and the sound absorbing structure of the indoor substation, to reduce sound pressure level at the boundary of a noise sensitive area. Optimization of the overalllayout of the indoor substation includes adjusting position of a transformer vault away from the noise sensitive area, reducing height of a clearstory and changing orientation of the clearstory; Improvements of the sound absorbing structure include increasing depth of a cavity of the sound absorbing structure, attaching a metal film to inside of a foam metal sound absorbing panel, and changing position of some sound absorbing material. The method analyzes the acoustic radiation characteristics through impedance tube comparison test and establishing a 3D multiphysics coupling model. The improved sound absorbing structure can effectively improve overall sound absorption effect and reduce sound radiation level of the substation.

The invention relates to a novel integrated vertical non-metal sound barrier system and an installation method. Sound barrier plates are connected through a joggle joint structure and a concrete pouring method, so that extra steel structural parts and other connecting parts or sealing parts are not needed between the sound barrier plates and between the sound barrier plates and a base, the problems that metal is exposed and consequently rusting is caused and rubber strips are prone to falling off are fundamentally solved, maintenance-free normal work can be achieved for 50 years or longer, thestability and safety of a sound barrier are greatly improved, and the railway operation safety is guaranteed.

The invention discloses a compound-type sound-absorbing wedge. The compound-type sound-absorbing wedge comprises a plurality of transversely and parallelly arranged wedge main bodies (10), each wedgemain body (10) comprises a base part (1), and the front end of each base part (1) is provided with a tip part (2); the rear ends of any two adjacent base parts (1) are connected; the interior of a shell of each wedge main body (10) is filled with a sound-absorbing material; and the sound-absorbing wedge is provided with at least one sound-absorbing cotton plate (3). According to the disclosed compound-type sound-absorbing wedge, a metal sound-absorbing wedge can have the good absorbing effect to low-frequency sound waves, and the absorbing performance to high-frequency sound waves can be improved; and the problem, existing on the metal sound-absorbing wedge, that high-frequency sound waves are prone to reflecting is effectively solved, the whole sound-absorbing effect of the sound-absorbing wedge is improved, wide application and popularization are facilitated, and significant production practice significance is achieved.

The invention discloses a Doppler sound processing method and device. The method comprises the steps of conducting Doppler imaging with a fixed pulse repetition frequency or a fixed sampling rate and acquiring orthogonal Doppler signals when a user sets a speed stage Vscale for Doppler imaging, wherein the fixed pulse repetition frequency or the fixed sampling rate is larger than a theoretical pulse repetition frequency or a theoretical sampling rate calculated according to the speed stage Vscale; conducting sound processing on the acquired orthogonal Doppler signals and playing the processed signals. Due to the fact that the pulse repetition frequency or the sampling rate is larger than the pulse repetition frequency corresponding to a flow rate gear selected by the user, sound aliasing caused by an over-low PRF is avoided during Doppler sound processing; meanwhile, when the PRF is low, due to the fact that the sound playing sampling rate is PRFmax instead of the PRF, metal sound can not occur from played signals. The Doppler sound processing method and device are easy to realize.

The invention discloses a metal sound-insulating door, comprising an inner door plate, an outer door plate, and a side frame for connecting the inner door plate with the outer door plate, wherein a first sound-insulating layer is arranged on the inner surface of the inner door plate; a second sound-insulating layer is arranged on the inner surface of the outer door plate; and a heat-insulating and fire-resistant material filling layer is arranged between the first sound-insulating layer and the second sound-insulating layer. Via the mode aforementioned, the metal sound-insulating door disclosed by the invention is good in sound-insulating and fireproof performances, simple and practical.

The invention discloses a long-service-life Chinese lute string. The Chinese lute string is of a laminated composite structure, an inner core of the laminated composite structure is a steel wire, an intermediate layer is coated on the outer surface of the inner core, and a nylon outer layer is arranged on the outer surface of the intermediate layer; a coating is arranged on the outer surface of the steel wire inner core, and the coating is a metal ceramic composite coating; the intermediate layer is a copper-based alloy layer; and the inner core of the laminated composite structure is a steel wire twisted rope formed by combining a single steel wire or a plurality of steel wires. The coating is arranged to ensure that the strength and elastic modulus of the inner core can be effectively increased, so that the fatigue damage resistance of the inner core can be improved, and original cracks on the surface of the inner core can be prevented from being further expanded to cause breakage under the condition that the Chinese lute string is played repeatedly for a plurality of times for a long term; and meanwhile, because components of the coating comprise both metals and ceramics, the playing tone of the Chinese lute string disclosed by the invention has the characteristic of bright metal sound, and also has the characteristic of relatively mild and soothing sound produced by the ceramics.

The invention provides a sound barrier system comprising folded plate buckling type metal sound barrier unit plates. The folded plate buckling type metal sound barrier unit plates and transparent sound insulation unit plates are inserted between adjacent H-shaped steel columns. The plate body of each folded plate buckling type metal sound barrier unit plate is of a rivet-free buckling type structure and is pressed and meshed through elastic pre-tightening force; and a sound absorption material is clamped and fixed in a closed manner through vertical support section bar lateral clamping groovesand upper and lower side plate trapezoidal clamping grooves inside. The sound barrier system can meet the requirements for lighting and sightseeing of passengers in a train, and the folded plate buckling type metal sound barrier unit plates are light in weight, good in stress, firm in fixation of the sound absorption materials, excellent in fatigue resistance, good in noise reduction effect and easy to assemble.

Can the Barking Dog is an audible device that individuals can use to train their dogs to refrain from barking uncontrollably. This item comprises a small metal aluminum container that has loose material (media) inside to create a jarring audible noise. Users simply shake the device creating a noise that stops a dog from barking. The container may be coated in rubber for increased durability. The device may have a wrist loop attached to the top making it easy for users to carry the device while walking a dog. The loose materials may be metal marbles or other items that create a metal-on-metal sound that is effective in capturing a dog's attention. The device may be designed with a button-operated component that compresses the loose material allowing users to silence the device in between uses. Further, the dog-bark inhibiting and training device includes a kit and a method of use.

The invention provides a vertical metal sound barrier unit plate which comprises a sound absorption module, a perforated panel is arranged on the side, facing a sound source, of the sound absorption module, the perforated panel is provided with a first perforated plate and a second perforated plate, the first perforated plate is located above the second perforated plate, and the second perforated plate is located above the first perforated plate from top to bottom in the height direction. The first perforated plate is gradually far away from the sound absorption module, the second perforated plate is gradually close to the sound absorption module, the lower end of the first perforated plate is connected with the second perforated plate, and a rain cover is arranged on the outer side of an orifice of a first hole formed in the first perforated plate. According to the vertical metal sound barrier unit plate, cotton volume weight increase, load increase and mildew aging caused by water seepage of the sound absorption module can be avoided, the sound absorption effect is improved, and the service life is prolonged.

The invention discloses an inorganic metal sound-absorbing composite board, which comprises a glass magnesium board. Aluminum foil and an aluminum board A are respectively arranged on the upper and lower sides of the glass magnesium board. A PVC decorative film is arranged on the upper side of the aluminum foil. The holes are distributed in a rectangular shape and correspond to the up and down sound-absorbing grooves on the glass magnesium board. Aluminum board B is placed under aluminum board A. The outer edge of aluminum board A is bent downward by 90°, and the outer edge of aluminum board B is bent upward by 90°. , and the outer edge of the aluminum plate A is connected by a self-locking mechanism, and a cavity is formed between the aluminum plate A and the aluminum plate B. The invention utilizes connecting rods to enhance the connection strength between the glass magnesium board and the aluminum board A, and a self-locking mechanism is provided between the aluminum board A and the aluminum board B, which is convenient for assembly, stable in structure and good in noise reduction effect. The invention has the properties of high strength, sound absorption and noise reduction, fire prevention, moisture resistance, environmental protection and the like. The invention has novel and reasonable structure, convenient use and suitable popularization.