149 results about "Noise barrier" patented technology

The embodiment of the invention discloses a sound barrier optimization method and device based on a noise source database and a medium, and relates to the technical field of sound barriers, and the method comprises the steps: collecting the multi-source noise time sequence data corresponding to a target road, carrying out the noise feature extraction and noise prediction based on the multi-source noise time sequence data, constructing the noise source database, and obtaining the noise source database; the noise source database comprises a real-time noise feature database corresponding to a current time node and a predicted noise feature database corresponding to a future time node; performing multi-period noise propagation simulation on the noise sensitive area of the target road through the real-time noise feature database and the predicted noise feature database, determining sensitive noise data corresponding to multiple time nodes, and determining a multi-period constraint condition corresponding to the sound barrier; and based on the multi-period constraint condition and a preset multi-objective optimization algorithm, determining a corresponding sound barrier design parameter solution set, so as to determine a sound barrier optimization strategy according to the design parameter solution set.

The invention discloses a sound barrier defect detection method and device, electronic equipment and a storage medium, and the method comprises the steps: collecting a sound barrier image through an unmanned aerial vehicle, marking a structure and defects of the sound barrier image, constructing a sound barrier detection data set, and designing a detection model comprising a multiple attention mechanism module, the model may be trained based on the detection data set. The sound barrier defect detection method based on the model comprises the following steps: inputting a target image of the sound barrier into the detection model to obtain an initial feature map; weighting the initial feature map based on the channel attention branch and the space attention branch to obtain a channel weighted feature map and a space weighted feature map, and splicing the channel weighted feature map and the space weighted feature map to obtain a target feature map; and determining a defect position of the soundproof barrier based on the target feature map. Therefore, the perceptivity of the model to the color and the structure of the defect is improved through two branches of the channel and the space contained in the multiple attention mechanism, so that the accuracy of defect detection is improved.

The present invention relates to a noise barrier wall panel that is lighter and more structurally sound than existing concrete noise barrier wall panels. The panel has a metal frame that is reinforced via metal strapping in key areas to prevent sagging. The panel has a plurality of layers forming a laminate that can be fixedly attached to the frame. A finish coating layer may have a plurality of designs, logos, symbols, or textures which may mimic building materials or scenery.

The invention discloses an urban road dynamic noise traceability evaluation method and system based on digital twinning, and the method comprises the steps: cooperatively collecting noise and road vibration signals through a non-uniform sound pressure sensor array and a vibration sensor, and dynamically compensating sound wave attenuation in combination with environment parameters; voiceprint features are extracted through wavelet packet decomposition, and dynamic parameters such as digital twinborn associated traffic flow and architectural acoustic reflection are constructed; improving a time difference positioning algorithm and fusing vibration spectrum verification to suppress environmental reflection noise; in the digital twin model, sound field distribution is predicted through sound ray tracking, health risks are evaluated based on a frequency band weighting model, and a parameterized sound insulation screen design and traffic flow regulation and control strategy is generated. The system integrates a multi-source sensing module, a digital twin engine module and an anti-interference positioning and decision optimization module, and realizes full-flow intelligentization of noise signal acquisition, feature fusion modeling, anti-interference positioning and treatment scheme generation.

The invention belongs to the technical field of road traffic noise reduction, and particularly relates to a sound barrier shape optimization method based on an isogeometric particle swarm singular boundary method. Comprising the steps of building a sound barrier geometric model, building a sound barrier shape optimization model, building a Burton Miller type singular boundary method program, calculating sound pressure, carrying out particle swarm iterative solution, outputting an optimization result and the like. According to the method, the model is optimized based on the isogeometric singular boundary method of the basic solution of the acoustic control equation for the first time, the model is applied to the optimization design of the sound barrier, the sound barrier is optimized by combining the particle swarm optimization method, only the size of the target function is needed, complex sensitivity derivation is not needed, and when the sound barrier with the complex shape is calculated, the method is simple and convenient to operate. The method has great flexibility and high efficiency, seamless integration between CAD and CAE is realized by introducing isogeometric analysis, namely representing geometric boundaries by using an NURBS function, and a tedious grid division step in an optimization process is avoided, so that the precision and efficiency of sound barrier optimization are remarkably improved.

The utility model relates to the field of rail transit sound barriers, in particular to an adjustable sound absorption and insulation barrier device for rail high-speed traffic, and solves the technical problems that a dustproof baffle on a sound absorption and insulation barrier used in urban rail transit is inconvenient to clean; according to the technical scheme, the adjustable sound absorption and insulation barrier device for the rail high-speed traffic comprises a concrete foundation, a stand column, a sound absorption and insulation barrier plate, a supporting assembly, a lifting assembly and a dustproof baffle assembly; the lifting assembly installed on the stand column serves as a carrying platform of the dustproof baffle assembly, a worker can manually control and adjust the dustproof baffle assembly on the outer side of the sound absorption and insulation barrier, the dustproof baffle assembly can easily slide to a low position, the worker does not need to climb to the top of the sound absorption and insulation barrier, the safety of cleaning work is greatly improved, and the working efficiency is improved. In addition, the cleaning efficiency can be improved, and the problem that a dustproof baffle on a sound absorption and insulation barrier used in urban rail transit is inconvenient to clean is solved.

The invention relates to the technical field of multi-layer glass, in particular to sound-insulation laminated glass and a preparation method thereof.The sound-insulation laminated glass comprises a glass body and a frame structure, the glass body is formed by compounding outer-layer glass, middle-layer glass and inner-layer glass through a laminated layer and a hollow frame, and the laminated layer is of a double-layer structure; a sound insulation layer is arranged between the laminated layers so as to realize full-band noise control; the hollow frame is filled with inert gas and is connected with the middle-layer glass and the inner-layer glass to form multiple sound insulation barriers; the frame structure comprises a main frame and a detachable transportation frame, the main frame is of a hollow structure, an inner cavity of the main frame is divided into a bearing cavity and a damping cavity through a broken line type interlayer, an X-shaped supporting rod is arranged in the bearing cavity to enhance the structural strength, and the damping cavity is filled with a sound insulation material; the transportation frame is composed of vertical baffles, transverse baffles and partition plates, and the vertical baffles are locked with preformed holes of the main frame through elastic insertion columns to achieve rapid disassembly and assembly; the purpose of enhancing the sound insulation performance and strength of the glass can be achieved.

An acoustic blanket absorbs acoustic energy and reduces noise in a launch vehicle. The acoustic blanket may be overlaid on a wall of a payload fairing of the launch vehicle. Materials and construction of the acoustic blanket allow for a relatively thin and light sound barrier. The acoustic blanket may comprise vertically-lapped polyester that is overlaid with a lightweight melamine foam. This combination of materials creates an acoustic impedance mismatch between layers that leads to absorption of acoustic energy across a relatively broad range of frequency bands. The acoustic blanket has a particular heat seal pattern that helps absorb noise while allowing the acoustic blanket to be relatively soft and flexible, which is useful for attaching the acoustic blanket to a curved wall of a fairing or other launch vehicle shapes. The acoustic blanket utilizes micro-perforations on multiple sides to allow for movement of air / venting while maintaining the bulk materials inside.

Relates to the field of building construction, and discloses a metro construction sound attenuation and noise reduction device which comprises a sound insulation shed arranged on the outer side of a well mouth and a cover plate fixed to the upper end of the well mouth and further comprises a fixing unit arranged on the outer side of the well mouth; the fixing unit comprises a bottom plate fixed to the outer side of the well mouth; the connecting piece is adjustably arranged at the upper end of the bottom plate; the fixing device is arranged on the connecting piece; by arranging the sound insulation shed and the cover plate, an effective sound insulation barrier can be formed at key positions such as a well mouth, noise and vibration transmission is remarkably reduced, interference to resident life is reduced, and after the well mouth sound attenuation cover plate, the sound insulation and noise reduction closed sound insulation shed and the sound absorption cotton are adopted, the sound insulation and noise reduction effects are improved. 24-hour uninterrupted construction can be guaranteed, 10-hour construction is increased at night, the construction production progress is accelerated, and the life quality of residents around construction is guaranteed.

The utility model relates to the technical field of sound insulation equipment, and discloses a splicing type sound insulation barrier for building construction, which comprises two groups of stand columns, two groups of multi-stage telescopic rods are fixedly connected between the two groups of stand columns, and a plurality of groups of sound insulation plates are arranged between the two groups of multi-stage telescopic rods. Sliding sleeves are rotationally connected to the middles of the tops and the bottoms of the sound insulation plates through rotating columns, the sliding sleeves are arranged on the outer surfaces of the corresponding multi-stage telescopic rods in a sleeving mode, a limiting mechanism is arranged between the two sets of stand columns, and when the limiting mechanism is unfolded, the sound insulation plates can be kept flush with the stand columns; the limiting mechanism comprises rotating shafts rotationally installed on the two sides of the outer surfaces of one set of stand columns, the outer surfaces of the rotating shafts are fixedly connected with multi-stage telescopic plates in the radial direction, the multi-stage telescopic rods are used for adjusting the distance between the two sets of stand columns, and when the multi-stage telescopic rods retract, the sound insulation plates can be rotated to be overlapped together, so that the sound insulation plates are folded, and the sound insulation plates are folded. Therefore, the size of the device can be reduced, and storage is facilitated.

The utility model relates to the technical field of sound insulation windows, in particular to a novel noise reduction window. Comprising a rectangular frame body, two sliding ways are fixed to the opposite end faces of the upper side and the lower side of the frame body, two window bodies are installed in the frame body, protruding strips make sliding contact with the window bodies, a plurality of universal balls are evenly distributed and installed at the groove bottom of a long groove, the universal balls make rolling contact with the protruding strips, outer sound absorption cotton is installed in the long groove, and the outer sound absorption cotton makes sliding contact with the groove wall of the long groove. The outer sound-absorbing cotton is in sliding contact with the protruding strips, a supporting plate is embedded and fixed to the side, facing the groove bottom of the long groove, of the outer sound-absorbing cotton, and the supporting plate is connected with the groove bottom of the long groove through a spring. According to the window body, the vacuum glass is adopted to isolate high-frequency noise, the inner sound-absorbing cotton is filled in the raised lines to absorb low-and-medium-frequency noise, and the outer sound-absorbing cotton and the sound-absorbing cotton ring further fill gaps, so that multi-frequency-band noise isolation is formed.

The invention discloses a modular connecting assembly of a combustion furnace sound barrier, and relates to the technical field of sound insulation of long-acting environment-friendly combustion furnaces for oil testing. The assembly comprises a straight face connecting unit used for tightly attaching and connecting the adjacent sound insulation plates of the straight face part, the straight face connecting unit comprises a straight face reducing stud and two straight face lug plates, the two straight face lug plates are arranged in an up-down mirror symmetry mode, and the inner ends of the two straight face lug plates are fixed to the hinged side frame edges of the adjacent sound insulation plates of the straight face part respectively. The straight-face variable-diameter stud comprises a large-diameter section, a variable-diameter section and a small-diameter section which are coaxial, all the sections are in smooth transition connection, in the locking state, the two straight-face lug plates are located and connected to the large-diameter section in a sleeving mode, in the unlocking state, the straight-face lug plate on the lower side is connected to the small-diameter section in a sleeving mode, and the straight-face lug plate on the lower side is located and connected to the small-diameter section in a sleeving mode. And the straight-surface lug plate on the upper side is sleeved on the large-diameter section. The sound insulation barrier is suitable for a foldable and spliced type sound insulation barrier with a multi-face corner enclosure, the sealing performance of the connecting position is high, sound insulation is good, and disassembly and assembly and corner splicing are convenient.

The utility model relates to the technical field of noise barriers, and discloses an engineering construction noise barrier structure which comprises a fixing table, fixing frames are arranged on the left side and the right side of the top of the fixing table, a top plate is arranged between the fixing frames, a connecting plate is arranged below the top plate, and a bottom plate is arranged below the connecting plate. And connecting blocks are arranged among the top plate, the connecting plate and the bottom plate. The connecting plates can be driven by pressing the control rods to take the fixing columns out of the fixing holes, the clamping blocks can be pulled out of the clamping grooves by lifting the bottom plate upwards at the moment, then the fixing blocks on the two sides of the top plate are moved out of the fixing grooves, and the sound insulation barrier can be detached from the fixing frame. The top plate, the connecting plate and the bottom plate can be bent and folded through the connecting blocks, so that the size is reduced, carrying is convenient, finally, the threaded nails are rotated and taken out from the threaded grooves, the fixing frame can be detached from the fixing table at the moment, and therefore the effects of rapid detachment and convenient transportation are achieved.

The utility model discloses an acoustic barrier device for noise elimination, and relates to the technical field of acoustic barriers, the acoustic barrier device comprises a mounting column, both sides of the mounting column are provided with sliding grooves, the interiors of the sliding grooves are connected with acoustic panels in a sliding manner, and the exterior of the mounting column is provided with a mounting groove. According to the utility model, through the cooperative arrangement of the mounting assembly and the fastening assembly, the sound insulation barrier can be continuously mounted, so that no gap is formed between the sound insulation barriers, and the sound insulation effect of the sound insulation barrier on noise is improved; when the sound insulation plates are installed, a plurality of sound insulation plates can be sequentially installed from bottom to top, the problem that high-altitude operation such as a scaffold is needed in the installation process can be avoided, the safety of the sound insulation plates in the installation process is improved, meanwhile, the sound insulation plates can form a whole through cooperative arrangement of the fixing blocks and the fixing plates, and the sound insulation plates are convenient to install. The overall stability of the noise barrier is improved, and convenience is brought to use of the noise barrier.

1. The name of the design product: sound barrier column. 2. The use of the design product: the sound barrier column is used for the soundproofing barrier along the road and on both sides of the bridge to tighten the sound barrier unit board in the steel column. 3. The design points of the design product: in the top view. 4. The picture or photo that best indicates the design points: perspective view.

The invention relates to the technical field of sound absorption and insulation barriers, and discloses a combined flexible sound absorption and insulation barrier which comprises a mounting base, a plurality of sound insulation barriers are arranged at the top of the mounting base, aluminum plates are arranged on the outer surfaces of the sound insulation barriers to serve as protective layers of the sound insulation barriers, and the aluminum plates are fixedly connected with a second mounting frame and a first mounting frame; the splicing assemblies are used for connecting the aluminum plates of the adjacent sound insulation screens, and stable connection and sealing performance between the sound insulation screen units are ensured; the supporting assembly is used for supporting the aluminum plate and ensuring the stability and the wind resistance of the sound insulation barrier, and the supporting assembly comprises a mounting plate fixedly connected to the outer sides of the aluminum plate and the sound insulation barrier. The supporting angle of the barrier is flexibly adjusted by swinging the angle of one end of the supporting rod, so that sound wave reflection and absorption paths are optimized, the sound wave incidence angle is changed, the sound wave reflection direction deviates from a sensitive area, the propagation path of sound waves in a barrier material is prolonged, and the sound absorption and insulation effect is improved.

The utility model discloses a floor heat preservation and sound insulation composite material structure for a building, which belongs to the technical field of plates and is characterized in that a heat preservation layer is positioned in a shell and plays a main role in heat preservation. The heat preservation layer is made of a hard foam plastic board which has good heat preservation performance, heat transfer can be effectively prevented, and it is guaranteed that the temperature in the floor is stable. Meanwhile, the reinforcing ribs are arranged on the side wall of the heat preservation layer, the stability of the structure is improved, the overall strength is improved, and structural deformation is prevented. The sound insulation layers are located on the two sides of the heat preservation layer, and a special double-layer sound insulation structure is formed. The sound insulation layer is made of a glass wool board material which not only has a good sound insulation effect, but also can effectively prevent fire. Due to the bent design of the sound insulation layer, the sound insulation layer can be tightly attached to the two sides of the heat preservation layer, an effective sound insulation barrier is formed, and sound transmission is remarkably reduced.

The utility model relates to a foldable portable noise barrier, which belongs to the technical field of noise barriers and comprises four mutually hinged frame bodies, noise barrier bodies are arranged in the four frame bodies, three limiting mechanisms are arranged on the four frame bodies, two limiting assemblies are arranged on the four frame bodies, and the limiting assemblies are arranged on the four frame bodies. The limiting mechanism comprises a connecting block fixedly connected with the top of the frame body, the top of the frame body is fixedly connected with a box body, the interior of the box body is slidably connected with a limiting rod, and the outer side of the limiting rod is sleeved with a first limiting spring. According to the foldable portable noise barrier, the limiting mechanism is arranged, so that the noise barrier has a limiting function, the effect of limiting two connected noise barrier bodies is achieved, the multiple noise barrier bodies are located on the same horizontal line, the noise barrier bodies are conveniently used, a user can conveniently use the noise barrier, and the practicability is high. And the practicability of the sound insulation barrier is improved.

The utility model discloses a multilayer building soundproof window which comprises a window frame, and a window sash is hinged to the front surface of the window frame. The sealing sound insulation device comprises an extending frame arranged on the rear surface of the window sash, a second EPDM multi-cavity sound insulation rubber strip installed on the outer side face of the extending frame, a concave part formed in the window frame, a plurality of first EPDM multi-cavity sound insulation rubber strips arranged on the concave part and tightly attached to the second EPDM multi-cavity sound insulation rubber strip, and a stabilizing assembly installed on the concave part. The sealing sound insulation device has the advantages that through the designed sealing sound insulation device, when the window sash is closed, the first EPDM multi-cavity sound insulation rubber strip and the third EPDM multi-cavity sound insulation rubber strip are both tightly attached to the second EPDM multi-cavity sound insulation rubber strip, an effective sound insulation barrier is formed, sound is prevented from being transmitted into a room from the connecting position of the window sash and the window frame, sound insulation can be achieved through the good sealing performance, and the sound insulation effect is good. The heat preservation performance of the window can be improved, and indoor and outdoor heat exchange is reduced.

The utility model belongs to the technical field of noise barriers, and particularly relates to a noise reduction barrier which comprises a sound barrier bottom plate. The top of the sound barrier bottom plate is fixedly connected with a first clamping plate and a second clamping plate. A sound insulation frame is arranged between the first clamping plate and the second clamping plate; an embedded block is arranged at the bottom of the sound insulation frame; a limiting plate is fixedly connected to the side wall of the embedded block; a spring is fixedly connected to the side wall, far away from the embedded block, of the limiting plate; the side wall, away from the embedded block, of the limiting plate is fixedly connected with a dragging block. The two dragging blocks are arranged in parallel and penetrate through the side wall of the first clamping plate; the sound insulation frame is limited by arranging the first clamping plate and the second clamping plate, the bottom of the sound insulation frame is fixed by arranging the limiting plate and the embedded block, and the fixing state of the sound insulation frame is controlled by arranging the dragging block and the spring, so that the installation process of the noise reduction barrier is simplified, the installation efficiency of the noise reduction barrier is improved, and the anti-jamming capability of the noise reduction barrier is enhanced.

The utility model discloses a sound insulation window, which relates to the technical field of sound insulation windows and is characterized in that when the sound insulation window is used, firstly, a user installs a sound insulation window shell on a window of a house near a busy block and a road, and when the sound insulation window is normally used, a glass frame is in a closed state; the sound insulation window shell and the glass frame are usually made of metal, aluminum alloy, plastic steel and other materials and have good sound insulation and heat insulation performance, the laminated glass and the sound insulation film in the glass frame are tightly connected to form an effective sound insulation barrier, the sound insulation film is usually made of PVB and other materials, and therefore the sound insulation window has good sound insulation and heat insulation performance, and the service life of the sound insulation window is prolonged. The effective sound insulation effect can be achieved, and the comfort level of the living environment is improved; when ventilation needs to be started, a user holds the handle to push the handle to the front side, the connecting piece is installed on the surface of the ball bearing and connected with the glass frame, when the handle is pushed to the front side, the ball bearing can be stressed to slide, and the connecting piece slides along the surface of the ball bearing.

The utility model relates to the technical field of backing plates, in particular to a backing plate with an excellent sound insulation effect, which comprises a backing plate, the backing plate comprises a front plate, a back plate and concrete bulges, and the front plate is connected with the back plate. Through an assembly composed of the front plate, the back plate and the concrete protrusions, a backing plate structure with the excellent sound insulation effect is provided for building construction, the XPS core plate layer has the good sound insulation performance and meanwhile facilitates heat preservation and heat insulation, the glass fiber layer can absorb and disperse sound waves due to the fiber structure of the glass fiber layer, the sound insulation effect is further improved, and the service life of the backing plate is prolonged. Meanwhile, the concrete layer provides a firm foundation and a certain sound insulation barrier, through the arrangement of the concrete protrusions on the back plate, a certain space can be well reserved between the back lining plate and the cavity through the concrete protrusions when the whole back lining plate is assembled with the building wall face, the back lining plate is prevented from being completely attached to the wall face, and the service life of the back lining plate is prolonged. Therefore, the efficiency of direct transmission of sound to the wall surface is reduced, and the sound insulation effect of the whole backing plate is greatly improved.

The utility model provides a windproof type sound insulation barrier, and belongs to the technical field of railway equipment, the windproof type sound insulation barrier comprises a sound insulation plate used for being fixed along a railway, multiple groups of windproof assemblies are arranged on the side face, facing or backing on to the railway, of the sound insulation plate, and each group of windproof assembly comprises a support, an air guide plate and an adjusting component; the support is fixedly arranged on the side face of the sound insulation board. The air guide plate is hinged to the support, and the hinged shaft is parallel to the surface of the sound insulation plate. The adjusting component is arranged between the support and the air guide plate and connected with the support and the air guide plate so as to adjust and fix the inclination angle of the air guide plate. Compared with the prior art, the windproof noise barrier is high in stability and remarkable in windproof effect.

The application discloses a kind of road construction soundproof barrier structures, relate to road construction technical field, including soundproof barrier structure, the soundproof barrier structure both sides are provided with splicing assembly, the soundproof barrier structure inside is provided with the transmission assembly extending to the inside of splicing assembly, the soundproof barrier structure inside is provided with the support assembly extending to the outer wall of another side thereof, the soundproof barrier structure inside is provided with the sound insulation component extending to its above, the soundproof barrier structure includes barrier body.The application is inserted into the splicing sleeve of another group of soundproof barrier structure by the insertion strip of a group of soundproof barrier structure, at this time, the inner slide block sliding in the splicing sleeve can be pushed, at this time, under the cooperation of Z-shaped rod, torsional spring and clamping trapezoidal block, Z-shaped rod can be reset under the action of torsional spring, clamping trapezoidal block and inner slide block outer wall can be engaged, which plays a limiting role, and achieves the effect of facilitating splicing.

The invention discloses a noise barrier plate, and relates to the technical field of road engineering. The noise barrier plate comprises a sound absorption layer and a sound insulation layer, the sound absorption layer comprises a first sound absorption layer and a second sound absorption layer, the first sound absorption layer is arranged on one side of the second sound absorption layer, and the porosity of the material of the first sound absorption layer is smaller than that of the material of the second sound absorption layer; the sound insulation layer is arranged on the side, away from the first sound absorption layer, of the second sound absorption layer, a plurality of through cavities are formed in the sound insulation layer in the first direction, the sound absorption layers can effectively absorb and absorb traffic noise, the sound insulation layer can block propagation of the noise, and due to the arrangement of the cavities, the cavity resonance effect can be improved, and the propagation of the noise can be blocked.

The present invention relates to an ingress barrier assembly comprising a frame defining a sound opening for the passage of sound and an, essentially acoustically transparent, ingress barrier membrane covering the sound opening, wherein the ingress barrier membrane has a Young's modulus of less than 0.1 GPa, and is configured such that it has a slackequivalent of more than 0.1 mm and a tension point of less than 0.2 kPa. The present invention further relates to a method for manufacturing the ingress barrier assembly; to use of an ingress barrier membrane in an ingress barrier assembly; to a dome incorporating the ingress barrier assembly; and to a device or device part comprising the ingress barrier assembly.

The utility model discloses a noise reduction type building construction platform, which relates to the technical field of building construction operation platforms and comprises a base, a circular fixing seat is arranged above the base, an L-shaped motor mounting plate is fixed on the outer side of the circular fixing seat, a second motor is fixed on the inner side of the L-shaped motor mounting plate, one side of the second motor is connected with a rotating rod, and the other side of the second motor is connected with a motor. A worm is fixed to one end of the rotating rod, a worm gear is connected to one side of the worm and meshed with the worm, a fixing shaft is installed in the worm gear, a connecting cylinder is fixed to the top end of the fixing shaft, a construction operation platform is fixed to the top of the connecting cylinder, and an annular protective fence is fixed to the top of the construction operation platform. An annular placing frame is arranged outside the annular protective fence, an electric telescopic rod is fixed in the annular placing frame, and a sound insulation barrier is fixed to the top end of the electric telescopic rod. The second motor is operated, so that the construction operation platform can rotate, and the effect of adjusting the construction direction is achieved.

The invention relates to the field of noise reduction of centrifugal pumps, and discloses an internal noise reduction type centrifugal pump which comprises a pump cover, the volute is arranged on one side of the pump cover, and an impeller is arranged in the volute; the noise reduction box body is arranged in the pump cover, and a motor is arranged in the noise reduction box body; through multiple noise reduction and vibration reduction structures, the noise reduction capacity of the centrifugal pump is improved, and the service life of the centrifugal pump is prolonged. The motor is packaged through the noise reduction box body, a first sound insulation barrier is formed, outward transmission of noise is reduced, meanwhile, the sound insulation cotton a is arranged in the noise reduction box body to wrap the motor, and high-frequency noise generated when the motor works can be effectively absorbed. In addition, a sound insulation cavity is formed in the pump cover and filled with sound insulation cotton b, so that propagation of low-frequency noise is reduced, and residual noise is further attenuated. The cushioning component is arranged between the motor and the noise reduction box body and can absorb mechanical vibration during operation of the motor and prevent the vibration from being directly transmitted to the noise reduction box body to cause a resonance amplification effect, so that noise enhancement and structural fatigue caused by resonance are reduced.

The present invention relates to a noise barrier wall panel that is lighter and more structurally sound than existing concrete noise barrier wall panels. The panel has a metal frame that is reinforced via metal strapping in key areas to prevent sagging. The panel has a plurality of layers forming a laminate that can be fixedly attached to the frame. A finish coating layer may have a plurality of designs, logos, symbols, or textures which may mimic building materials or scenery.

The invention relates to a manual noise reduction intelligent door and window system, and belongs to the technical field of intelligent doors and windows. The manual noise reduction intelligent door and window system comprises an outer frame, a window sash is hinged to the inner side of the outer frame, a positioning groove is formed in the surface of the window sash, and an intelligent noise reduction mechanism connected with the positioning groove in a clamped mode is installed in the outer frame in an embedded mode; the intelligent noise reduction mechanism comprises an annular frame embedded in the inner side of the outer frame, and an annular groove communicating with the positioning groove is formed in the inner side of the annular frame; external noise is collected in real time through the microphone, a built-in AI chip of the Internet of Things microcontroller analyzes noise spectrum and phase and generates reverse interference sound, and the loudspeaker emits sound waves to the noise direction for interference offset, so that structural sound transmission caused by vibration is effectively inhibited, and the problem that the resonance efficiency of an existing door and window sound barrier is remarkably reduced is solved. And the active noise reduction capability is improved.