3076results about "Flooring insulations" patented technology

The invention relates to a decorative panel, in particular a floor panel, ceiling panel or wall panel. The invention also relates to a decorative covering, in particular a decorative floor covering, decorative ceiling covering, or decorative wall covering, comprising a plurality of mutually coupled decorative panels according to the invention. The invention further relates to a core for use in a panel according to the invention. The invention additionally relates to a method of producing a decorative panel, in particular a decorative panel according to the invention.

The invention discloses a high-performance green and environment-friendly single-component polymer cement waterproof dry blend and a preparation method thereof, and relates to the technical field of building materials, the high-performance green and environment-friendly single-component polymer cement waterproof dry blend comprises the following components: an inorganic cementing material, latex powder, graded quartz sand, a functional filler, cellulose ether, an organic silicon defoamer, a polycarboxylic acid water reducer and compound fibers; the functional filler is modified waste glass powder prepared through mechanical activation and silanization modification; the compound fiber is a mixture of modified glass fiber and modified polypropylene fiber; the preparation of the modified glass fiber comprises tannic acid and polyethyleneimine combined modification and graphene oxide modification, and the preparation of the modified polypropylene fiber comprises plasma activation. The polymer cement waterproof dry blend prepared by the method adopts the glass powder to replace natural mineral filler, is energy-saving and environment-friendly, and the cement matrix is modified by various fibers, so that the prepared polymer cement dry blend is excellent in comprehensive performance.

The utility model discloses a mute floor which comprises a surface treatment layer, a protection layer, a decoration layer, a first carrier, a first buffer layer and a second carrier. The surface treatment layer is arranged on one side of the protection layer, the decoration layer is arranged on the other side of the protection layer, the first carrier is arranged between the decoration layer and the first buffer layer, the first buffer layer is arranged between the first carrier and the second carrier, and the first buffer layer is of a porous structure and / or a net structure. A buffer groove is formed in at least one side face of the first buffer layer and extends to the two ends of the side face. By arranging the floor with the first buffer layer with the porous and / or honeycomb structure, noise is reflected and refracted for multiple times in the porous and / or honeycomb structure, so that sound is attenuated, a sound wave propagation path is prolonged, and the effect of more effectively reducing noise propagation is achieved.

A flame-retardant laminated solid wood composite floor and a manufacturing method therefor. The manufacturing method comprising: first reacting dopamine hydrochloride with acryloyl chloride to generate a dopamine acrylamide monomer; by means of a double bond in the dopamine acrylamide monomer, carrying out a click reaction with a phosphate monomer containing a sulfydryl group, so as to introduce a catechol group into a side chain of the phosphate monomer and obtain a flame-retardant monomer containing the double bond; and then mixing pentaerythritol tetra(3-mercaptopropionate), pentaerythritol triacrylate, perfluorodecanethiol and the flame-retardant monomer containing the double bond to obtain a photocurable coating material. The coating material is photocured after being coated on the surface of a wood veneer, thus effectively improving the flame-retardant performance of the wood veneer; moreover, the adhesion between the coating layer and the wood veneer is excellent. The wood veneers are laminated in multiple layers, are glued and assembled into a layered structure, and then hot-pressed to form the solid wood composite floor, thus improving the comprehensive performance.

The utility model discloses a composite prefabricated toilet bottom tray, including a bottom plate, a reserved structural connecting steel bar, an inner waterproof layer, a waterproof side wall, an inner cavity, a decorative layer and embedded water and electricity accessories. The four sides of the bottom plate extend upward to form a waterproof side wall. The upper end of the bottom plate is installed with a decorative layer. A plurality of embedded water and electricity accessories are arranged inside the inner cavity. The decorative layer, the bottom plate and the waterproof side wall form an inner cavity. A waterproof layer is arranged between the waterproof side wall and the decorative layer. The waterproof side wall around the bottom plate is provided with embedded connecting steel bars. The embedded connecting steel bars are used to connect with the main structure. The utility model can improve the product integration, improve the anti-leakage performance of the toilet, reduce the noise interference of going up and down the stairs, facilitate maintenance, reduce the risk of the use process, and at the same time make the industrialization degree of the toilet construction higher, reduce the consumption of workers and materials in the construction process, improve the construction efficiency, reduce environmental pollution, and realize green construction.

The invention provides a fabricated building wall and a construction method.The wall comprises a frame keel, a noise reduction keel, a wall core material and an outer wallboard, an annular cavity with openings in the two sides is formed in the frame keel, and the noise reduction keel and the wall core material are located in the annular cavity; openings in the two sides of the annular cavity are blocked by the external wall panel; the cross section of the noise reduction keel comprises at least two Z-shaped structures connected end to end, and the Z-shaped structures are used for dividing the annular cavity into a plurality of noise reduction reflection cavities. The noise reduction keel is optimally designed, and the wall body core material and the vibration reduction strips with the sound absorption effect are additionally arranged, so that the sound insulation performance of the wall body is effectively improved, the sound insulation effect of the wall body is improved without thickening the wall body or increasing the number of external wall panels, and the problems of cost increase, quality reduction and the like caused by the sound insulation effect are avoided; by optimally designing the shapes and structures of the joints of the heaven and earth keels, the side wrapping keels, the vibration reduction keels and the wall body core materials, the installation efficiency, stability and tightness of the wall body are improved.

The invention discloses an assembly type efficient sound insulation cover convenient to install, and relates to the technical field of sound insulation covers. Comprising a plurality of pieces of main body square steel, the main body square steel are linearly and evenly distributed at equal intervals, jacking mechanisms used for improving the bottom supporting strength are arranged on the inner walls of the main body square steel correspondingly, and assembly type connecting mechanisms used for improving the connecting strength and stability are installed in the main body square steel correspondingly; according to the assembly type efficient sound insulation cover convenient to install, main body square steel is inserted and limited in a penetrating and inserting mode through the assembly type connecting mechanism, the defect that limiting performance is insufficient due to the fact that a lap joint mode is directly used in a traditional structure is overcome, the whole assembly process is simpler and more convenient, rubber pads and expansion water stop strips are arranged at splicing joints, and the assembly efficiency is improved. The vibration transmission of equipment can be blocked, the inherent frequency is kept away from the vibration frequency of the equipment, secondary noise caused by resonance is avoided, meanwhile, through gaps are reduced, the noise is prevented from leaking from the insertion hole position, and the problem of noise leakage is solved.

The invention provides a movable sound insulation dustproof construction shed, a plurality of supporting mechanisms are sequentially arranged in a shed body in the X-axis direction, and each supporting mechanism comprises two telescopic rods oppositely arranged in the Y-axis direction, a supporting assembly erected on the two telescopic rods and a walking assembly connected to the lower end of each telescopic rod; each telescopic rod is provided with a first limiting assembly used for limiting a sound insulation plate installed on the telescopic rod, and the supporting assembly comprises a first arc-shaped supporting rod and a second arc-shaped supporting rod which are used for supporting the shed body located at the upper ends of the two telescopic rods and can be oppositely folded. The walking assembly is used for driving each telescopic rod to move or stop, so that the problems that an existing dustproof noise reduction shed lacks comprehensive shielding and sound insulation measures on a device to be shielded, and sound insulation felt cloth is inconvenient to disassemble and assemble, so that the dustproof noise reduction effect and stability of the dustproof noise reduction shed are poor are solved.

The utility model belongs to the technical field of building materials, and relates to an anti-skidding and shock-absorbing mute composite floor which sequentially comprises a resin layer, a mute layer, a base material layer, a balance layer and a shock-absorbing layer from top to bottom. Wherein the mute layer is a cork layer, and the thickness of the mute layer is 2-4 mm; the base material layer is a plywood layer, and the thickness of the base material layer is 7-9 mm; the balance layer is a plywood layer, and grooves which are uniformly distributed in parallel are formed in the surface of the balance layer; the damping layer is a foaming material layer, the thickness of the damping layer is 4-6 mm, and the damping layer is provided with evenly-distributed air channels. The mute layer is made of cork, is light in density and has soft and elastic touch feeling, cells of the cork are of a honeycomb structure filled with gas, have low conductivity on heat, noise and vibration and have a synergistic effect with the foaming damping layer at the bottom, and the surface is coated with the anti-skid coating with good flexibility, so that the anti-skid damping mute floor has a good impact sound absorption effect; the impact absorption performance is excellent, the head injury evaluation value is low, and the protection and mute effects are achieved.

The invention relates to the technical field of wood-plastic floors, in particular to an anti-corrosion and anti-insect straw wood-plastic floor and a preparation process thereof.The anti-corrosion and anti-insect straw wood-plastic floor comprises a floor body, and the floor body further comprises an upper-layer plate, a middle-layer plate and a lower-layer plate which are sequentially and fixedly connected from top to bottom; the medicine box is mounted at the end part of the connected floor main body; the medicine loading assembly is mounted in the medicine box; the water flow channel is formed between the middle-layer plate and the lower-layer plate, and the end of the water flow channel communicates with a water inlet pipe penetrating through the upper-layer plate to form a water inlet; the medicine flow path is arranged between the upper-layer plate and the middle-layer plate; the water flow driving assembly is mounted in the pesticide box and used for driving water flow to pass through the pesticide loading assembly; according to the device, through the arrangement of the water flow driving assembly and the pesticide flow path, insect prevention protection on the floor is achieved, pesticide can remain in the pesticide flow path, the onset time of the pesticide can be prolonged, and therefore the insect prevention time efficiency of the floor is enhanced.

The invention discloses a damping and sound-absorbing wood composite floor suitable for aging, which is strictly and orderly compounded according to a four-layer structure from top to bottom, and all layers are clear in division of labor and have a synergistic effect to form an organic whole with complementary functions: the first layer is a wood grain facing layer; the second layer is a cushioning layer; the third layer is a wood core layer; the fourth layer is a sound absorption layer; the preparation method of the damping and sound-absorbing wood composite floor suitable for aging comprises the following steps that firstly, all the layers are evenly coated with waterborne polyurethane environment-friendly adhesives through high-precision gluing equipment, and the gluing amount is 120-150 g / m < 2 >; 2, hot-pressing compounding: during hot-pressing compounding, controlling the temperature to be 120-140 DEG C, the pressure to be 8-12MPa, the time to be 8-10 minutes and the peel strength to be greater than or equal to 1.5 N / mm, and meanwhile, avoiding the performance degradation of the material caused by high temperature; the invention has the following beneficial effects: the noise within the frequency range of 100-5000 Hz is comprehensively reduced to 35-45 decibels; a weight of 60kg freely falls down at a height of 30cm, and the impact absorption value of the floor reaches 55-60%; a 24-hour boiling water dipping test shows that the water absorption thickness swelling rate is less than or equal to 8%; and the cost is reduced by 30-40%.

The invention provides a self-repairing nano-composite heavy-load corrosion-resistant floor system and a preparation method thereof, a multi-layer gradient interpenetrating network structure comprises a bottom reinforcing layer, a middle barrier layer, a surface functional layer, a self-repairing module and an intelligent monitoring module, and the multi-layer gradient structure is combined with a porous framework and a nano-reinforcing material to form the self-repairing nano-composite heavy-load corrosion-resistant floor system. Compression resistance and impact resistance are obviously better than those of a traditional terrace, heavy-load working conditions can be borne for a long time, and high-strength load resistance is achieved; the directional barrier layer and the super-hydrophobic surface layer have a synergistic effect, so that corrosion media such as acid and alkali are effectively prevented from permeating, and the service life is prolonged; the microcapsules and the shape memory material are embedded, so that cracks of more than 0.2 mm can be automatically repaired, and the manual maintenance cost is reduced; the integrated sensor network feeds back the state of the terrace in real time, carries out real-time monitoring, carries out early warning on damage in time and triggers repair, improves the safety, is simple in process, adapts to a complex construction environment, and reduces the engineering difficulty.

The utility model relates to the field of power transformation engineering sound barriers, in particular to a power transformation engineering movable noise reduction barrier capable of being patrolled externally, which comprises a plurality of steel columns, a steel bottom beam positioned at the lower sections of the steel columns and a steel top beam positioned at the upper sections of the steel columns, and the plurality of steel columns, the steel bottom beam and the steel top beam form a sound barrier frame. A sound barrier plate is arranged between every two adjacent steel columns, and the sound barrier frame and the sound barrier plates form a noise reduction barrier. The sound barrier construction period of the transformer substation and the converter station is shortened. According to the utility model, on-site material, machine tool and personnel investment is reduced, construction waste emission is reduced, noise pollution is reduced, and carbon emission is reduced. Daily patrol of operators is facilitated, the device can be quickly moved when the device needs to be carried during maintenance, a channel is reserved for carrying the device, the power failure time is effectively saved, and the working efficiency is improved. The technical problems that the construction period is long, resources are wasted, pollution is serious, and replacement and carrying are inconvenient can be solved.

Insulating floor system including (i) a grooved base layer formed from base layer grooved portions, (ii) a transverse peripheral edge rail formed from transverse peripheral edge rail portions, (iii) a parallel peripheral edge rail formed from parallel peripheral edge rail portions, and (iv) interior rails formed from interior rail portions. The base layer includes grooves in an upper surface. Each of the transverse peripheral edge rail portions include a plurality of downwardly projecting mating protrusions that mate within the base layer grooves. Each of the parallel peripheral edge rail portions include a downwardly projecting protrusion that mates within a peripheral groove of the base layer. At least one of the interior rails can be a locking rail, where locking rail portions defining the locking rail include a plurality of downwardly projecting mating protrusions that mate within terminal grooves of adjacent base layer grooved portions, locking such portions together.

The utility model belongs to the technical field of floors, and particularly relates to a high-strength anti-deformation anti-static floor which comprises a fixing frame, a second sealing rubber pad is fixedly installed on the top of the fixing frame, an anti-static floor body is installed on the fixing frame in an inserted mode, and four fixing strips are arranged on the top of the fixing frame. The bottoms of the four fixing strips are fixedly provided with first sealing rubber pads, and the bottoms of the four first sealing rubber pads are in close contact with the top of the second sealing rubber pad and the top of the anti-static floor body. The four fixing assemblies are located on the four fixing strips correspondingly and used for fixing the positions of the four fixing strips correspondingly; the anti-static floor comprises an anti-static floor body and two rectangular strips, the two rectangular strips are fixedly installed on the rear side and the right side of the anti-static floor body respectively, grooves are formed in the front side and the left side of the anti-static floor body, when the whole anti-static floor is used, the anti-static floor body can be detached, operation is convenient and fast, and tools do not need to be used.

The utility model relates to the technical field of assembly type wall accessory devices, in particular to a novel assembly type building outer wall connecting component and an assembly type building, which have the advantages that the operation is simple, the connection between walls is convenient, the stability between the walls is improved, and the assembly efficiency of the walls is improved. According to the novel fabricated building outer wall connecting component, the two sets of shielding plates are installed through the fixing assemblies, and the two sets of shielding plates shield a gap generated when the two sets of fabricated walls are assembled, so that the attractiveness of the fabricated walls is improved, mice are prevented from entering a room through the gap, and therefore the practicability is enhanced. Comprising two sets of assembly type wall bodies, two sets of shielding plates, two sets of first clamping blocks and two sets of second clamping blocks, the two sets of assembly type wall bodies are fixed through first clamping assemblies, and the two sets of assembly type wall bodies conduct secondary reinforcement on the first clamping assemblies through tenon-and-mortise assemblies.

To provide a partition wall using wood finishing material and having excellent sound insulation performance.SOLUTION: A partition wall P includes sound insulators 11 and 12 arranged and erected facing each other at a predetermined interval, a wood finishing material 20 covering the surface of at least one of the sound insulators 11 and 12, and a support member 30 for the sound insulators 11 and 12 and the wood finishing material 20, which is interposed between the sound insulators 11 and 12. At a butt joint 25 of the wood finishing material 20, a flange 31b of the support member 30 is in contact with the sound insulator 11. The wood finishing material 20 is attached to the flange 31b of the support member 30 by means of a fitting (screw 17) that passes through the sound insulators 11 and 12.SELECTED DRAWING: Figure 1

The invention relates to a prefabricated assembly type heat preservation and sound insulation building floor structure, and belongs to the technical field of building construction, the prefabricated assembly type heat preservation and sound insulation building floor structure comprises a base layer bearing plate, a heat preservation layer, an elastic sound insulation cushion layer and a surface layer leveling layer, a fixing pipe is pre-buried in the base layer bearing plate, the upper end of the fixing pipe penetrates through the heat preservation layer, and a first partition plate is arranged on the upper surface of the heat preservation layer; the upper end of the fixing pipe penetrates through the first partition plate, a fixing assembly capable of being fixedly separated from the first partition plate is arranged on the fixing pipe, a second partition plate is arranged above the elastic sound insulation cushion layer, the upper end of the fixing pipe penetrates through the elastic sound insulation cushion layer, and a connecting pipe is fixedly arranged on the side, facing the elastic sound insulation cushion layer, of the second partition plate. A connecting assembly capable of being connected with the fixing pipe is arranged on the connecting pipe, an operation groove is formed in the second partition plate in a penetrating mode, a power assembly capable of providing power for action of the connecting assembly is arranged at the position of the operation groove, and an avoiding groove is formed in the surface layer leveling layer in a penetrating mode.

The invention relates to the field of modular integrated buildings, in particular to a non-descending plate same-floor drainage toilet structure of a modular integrated building and a construction technology, the structure comprises a toilet module and a non-wading room module, the bottom surfaces of bottom pockets of the toilet module and the non-wading room module are flush, and the top surfaces of plates form a certain height difference; the method is used for realizing ground slope finding of the toilet module, ground water prevention and an anti-overflow height difference of 15mm with the finished surface of the non-wading room module. The combined design of the pressing floor drain and the drainage groove is used for achieving floor drainage of the washing area and the shower area of the bathroom module, and water on the ground of the shower area can be effectively prevented from returning and overflowing to the ground of the washing area. According to the process level, the toilet bottom pocket is poured through the back-off production process, in order to reduce the cost and improve the strength of a bottom plate, ultra-high-performance concrete is adopted for the toilet bottom pocket with the high waterproof requirement and a local upturning area, and common concrete is adopted for other back sills; the problem that the thickness of a ground surface layer is increased in order to achieve ground drainage in a non-descending-plate toilet is solved.

A plant sound insulation screen comprises sound insulation plates continuously arranged on one side of a plant wall, a preset interval is formed between every two adjacent sound insulation plates, and supports are arranged at the positions, corresponding to the adjacent sound insulation plates, of the wall. The support is of a metal plate structure, the lower end of the support is provided with a supporting plate perpendicular to the enclosing wall and extending outwards and used for supporting the bottom faces of the ends of the sound insulation plates, the top of the support is flush with or higher than the top faces of the sound insulation plates, and the width of the support is larger than the interval between the adjacent sound insulation plates. The bracket is fixed on the surface of an enclosing wall through expansion screws; locking screws are vertically arranged on the support in a penetrating mode and located in the intervals between the adjacent sound insulation plates, and pressing plates are arranged on the locking screws in a sleeving mode and used for pressing the side portions of the sound insulation plates. The scheme facilitates later replacement of the sound insulation board, is more convenient to disassemble and assemble, and can effectively ensure the uniformity and sound insulation effect of the sound insulation screen before and after replacement of the sound insulation board.

The invention relates to a decorative panel, comprising at least one substrate comprising an upper surface and a bottom surface and two pairs of opposing side edges, wherein the substrate comprises at least one core layer and at least one decorative layer and the panel comprising at least one coating layer, wherein the coating layer is provided upon the upper surface of the substrate, wherein both the upper surface of the substrate and the upper coating surface of the coating layer have a predetermined Shore D hardness.

The utility model relates to a continuous welding color-coated stainless steel roof panel structure, and belongs to the technical field of roofs, the continuous welding color-coated stainless steel roof panel structure comprises panels which are sequentially and continuously arranged on the roofs, each panel comprises a bottom plate and vertical plates arranged on the two sides of the bottom plate, the bottom plates are used for abutting against the roofs, the adjacent vertical plates are used for abutting against the roofs, coatings are arranged on the bottom plates, and the coatings are arranged on the bottom plates. During use, the adjacent panels are connected together in a continuous welding mode, fixation is stable, the sealing performance is good, and the waterproof performance and the wind resistance are improved.

The utility model discloses a conjoined junction box with a sound insulation function. The conjoined junction box comprises a first junction box, a second junction box and a sound insulation body, the sound insulation body is arranged between the first junction box and the second junction box; the shells of the first junction box and the second junction box are also wrapped with a third noise reduction layer; and a fixing piece is arranged outside the one-piece wire box. According to the invention, by arranging the one-piece junction box in the household wall, the problems of repeated construction and noise generated in the construction process when the junction box is independently arranged in the household wall can be avoided, the damage to the structure of the household wall in the construction process is reduced, and in addition, the sound insulation body is arranged between the first junction box and the second junction box, so that the sound insulation effect is improved. In the process of installing the junction box on the household wall body, the mute effect in the installation process of the junction box at the same position between household splitting can be achieved, and the obvious noise reduction effect in the use process of the junction box in the household wall can be achieved.

The invention describes a subfloor or a split subfloor system for use in the construction of a portable deck. The proposed subfloor system can be installed without any special skill set or tools. The subfloor comprises of several footings that are arranged on the ground, at least two pre-notched beams that are placed on the footings, at least two pre-notched joists that rest perpendicularly on the pre-notched beams, at least two frame units that rest perpendicularly on the pre-notched beams in a direction parallel to the pre-notched joists, and at least one rim joist secured to each end of the pre-notched joists and the frame units. These components of the subfloor system could also be split in two or more pieces for a split subfloor system that makes transportation easier. A kit comprising the components of the subfloor system and a method of construction is also provided.

An acoustic baffle system that includes an acoustic baffle coupler, an acoustic baffle, and one or more fasteners to secure the acoustic baffle system to a ceiling. The acoustic baffle coupler includes a body comprising an upper end, a first lateral end, a second lateral end, a lower end, a slot defined in the upper end and extending from a first end to a second end, a first channel defined in the first lateral end and extending from the first end to the second end, and a second channel defined in the second lateral end and extending from the first end to the second end. An acoustic baffle is secured into the first and second channels of the acoustic baffle coupler. The one or more fasteners are disposed within the slot of the acoustic baffle coupler and the one or more fasteners are secured to the ceiling.

The utility model relates to the technical field of noise reduction structures, and discloses a rapid assembly type acoustic hood which comprises a plurality of steel stand columns and a plurality of steel beams, the steel stand columns and the steel beams are connected through bolts and jointly form a supporting structure of the acoustic hood, and a top face sound absorption and insulation plate is arranged at the top of the acoustic hood. The top surface sound absorption plates are identical in modulus, and the wall surface sound absorption and insulation plates are identical in modulus. The top surface sound absorption plates and the wall surface sound absorption and insulation plates are connected in an embedded mode through mortise and tenon joint structures. The edge of the top face assembly is bent downwards, so that an installation space is formed on the bottom face of the structure, and the top face sound absorption and insulation plate is buckled to a supporting structure composed of the steel beam, the steel stand column and the wall face sound absorption and insulation plate through the installation space. The connecting mode between the top face / wall face sound absorption and insulation plates is changed into the mortise and tenon joint connection mode, and the top face sound absorption and insulation plates are buckled to the supporting structure, so that the technical problem that in the prior art, the cost and the sound insulation performance of an acoustic enclosure cannot be considered at the same time is solved.

The utility model discloses a wear-resistant self-leveling floor, which belongs to the technical field of self-leveling floors and comprises a first concrete layer, a second concrete layer is laid on the top of the first concrete layer, and insertion holes are formed in the first concrete layer at equal intervals. The embedded rod is fixedly connected with the concrete base layer in an embedded mode, the sealing plug at the opening of the groove of the embedded rod is taken down, then epoxy resin is poured, the epoxy resin flows naturally and flows into the groove, after the epoxy resin is solidified and formed, the anti-static coating is sprayed, and after the self-leveling floor is formed, the anti-static coating is formed. The epoxy resin layer and the epoxy resin flowing into the groove are integrally fixed, the epoxy resin layer is prevented from being separated from the concrete base layer through the epoxy resin flowing into the groove, the adhesive capacity of the epoxy resin layer is effectively improved, the peeling problem of the epoxy resin layer is avoided, and the quality of the self-leveling floor is effectively improved.

The invention discloses a light modulation sound absorption superstructure which comprises at least one sound absorption back cavity, the sound absorption back cavity comprises an inner cavity and at least one outer cavity which is arranged on the outer side of the inner cavity and is annularly arranged, a cavity division partition plate is arranged between the inner cavity and the outer cavity, and at least two cavity division doors are arranged in the outer cavity and divide the outer cavity into at least two unequal cavity channels. The cavity division partition plate and the cavity division door each comprise a flexible light response driver and a rigid panel which are fixedly connected, a micro-perforated hole is formed in the area, corresponding to the inner cavity, of the upper cover, and the area, corresponding to the outer cavity, of the upper cover is of a transparent structure. According to the invention, the light-driven flexible light response driver is used as a driver, the inner cavity and the outer cavity are arranged, and the driver controls the conduction or separation of the inner cavity and the outer cavity and controls the opening and closing of the unequally divided outer cavities, so that the sound wave equivalent path can be changed, and the sound absorption frequency band of the sound absorber back cavity can be adjusted; and the large-range non-contact adjustment of the sound absorption performance is realized.

The utility model relates to the technical field of calcium silicate boards, in particular to a calcium silicate board waterproof structure which comprises a structure body, a first calcium silicate board layer is arranged at the top of the structure body, a colored surface is arranged at the bottom of the first calcium silicate board layer, an anti-corrosion layer is arranged in the structure body, a drying layer is arranged in the anti-corrosion layer, and a fireproof frame is arranged in the drying layer. A silencing structure is arranged in the fireproof frame and mainly comprises a silencing layer, a sound transmission hole, a silencing opening, silencing cotton and a silencing medium. Through the arrangement of the sound transmission holes, the silencing openings, the silencing cotton and the silencing medium, noise transmission can be reduced through the silencing layer, external noise is absorbed through the sound transmission holes, the absorbed noise is transmitted to the interior of the sound absorption medium, and the absorbed noise is circularly transmitted and reduced through the silencing holes in the sound absorption medium; and through the silencing cotton, the transmission of noise can be reduced, the volume of the noise is effectively reduced, and the sound insulation effect of the sound reduction layer is ensured.

A textured barrier substrate includes a substrate having a first side and a second side opposing the first side. One or more protrusions extend from the second side. The first side is configured for securing to a first building structure, such as a joist, and the protrusions are configured to contact and support a second building material, such as flooring.