Indoor wall composite sound insulation structure and construction method thereof
By adopting a multi-layered composite sound insulation structure in the building structure, combining sound absorption and sound insulation technology, the problem of difficult isolation of low-frequency noise in the existing technology is solved, and the effect of effectively isolating and eliminating noise without encroaching on space is achieved. .
Patent Information
- Application Number
- CN202411127151.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2024-12-20
AI Technical Summary
The prior art is not ideal when dealing with low-frequency noise generated by sound transmission in building structures, it is difficult to effectively isolate and affect the living environment, and often requires encroaching on the use space.
The composite sound insulation structure of the interior wall is adopted, including the attached wall structure, the inter-wall structure and the sub-wall structure. By changing the physical properties of the wall, combining sound absorption and sound insulation, the use of broken keels, sound absorption asbestos, sharp corner rebate boards, porous sound insulation boards and Air gap, breaking and absorbing low-frequency noise, achieving multi-layered sound insulation effect.
Under the premise of reasonable encroachment of space, it maximizes the isolation and elimination of noise, reduces the outflow of high and low frequency noise, and especially effectively deals with low frequency noise vibrations to meet the comfort needs of the living environment.
Smart Images
Figure CN119163148A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of building decoration structures, and in particular to an indoor wall composite sound insulation structure and a construction method thereof. Background Art
[0002] With the improvement of people's living standards and the development of the construction and decoration industries, people's awareness of the comfort of their living environment has gradually become more detailed and specific, and one of the most important indicators is the indoor noise.
[0003] Most indoor noise comes from external noise and building structure transmission. Among them, the external noise that can penetrate into the house generally has a higher frequency and is easy to isolate through door and window modifications; while structural transmission is mostly caused by low-frequency vibration of the sound source, which resonates with a wall in another space in the building at the same frequency. The generation of this type of resonance is related to the basic physical properties such as the size of the other space and the mass of the wall. It is often manifested as a continuous or surge-like humming, whistling and other types of noise from a wall in the house, while other walls are normal. However, continuous low-frequency noise in the house greatly affects the health of residents, especially families with children and students. Indoor noise can easily affect the growth and development of children and the daily learning of students.
[0004] For the case of sound transmission from building structures, the best solution is to dampen the noise source or change the placement and connection position. However, in general, the sound source of structural sound transmission is extremely difficult to locate, and the wall where the resonance occurs is not close to the sound source. It takes a lot of time and energy to identify the noise source, and coordination and communication are often hindered. Therefore, this type of low-frequency noise problem is always difficult to solve. Among the existing methods of processing on the noise side, the simple treatment is nothing more than attaching sound-absorbing patches and shock-absorbing felt pads on the wall. In theory, such attachments should be covered in the sound source room to prevent the noise from going out of the house. However, if they are used on the wall where the noise penetrates, the effect is minimal. The professional treatment method is only to set up gypsum boards on the outside of the wall and fill a large amount of sound-proof asbestos in the interlayer. Due to the strong penetration of low-frequency noise, the actual effect of such treatment can only reduce the noise to a certain extent. If you want to completely eliminate it, you need to increase the filling thickness. The increase in thickness has seriously encroached on the use space of the house, which is not worth the loss. Summary of the invention
[0005] The technical problem to be solved by the present invention is: to overcome the defect that the existing treatment method for low-frequency noise generated by sound transmission of building structures is not ideal, and to provide an indoor wall composite sound insulation structure and its construction method, which combines the treatment methods of changing the physical properties of the wall, coordinating sound absorption and sound insulation, and structural segmentation to block low-frequency propagation, thereby reducing, blocking and isolating the transmission of high and low frequencies (especially low-frequency noise vibrations) from many aspects, and maximizing the effect of isolating and eliminating noise on the noise-generating side under the premise of reasonably occupying the use space.
[0006] The composite sound insulation structure of indoor walls and the construction method thereof include a wall-attached structure fixed on the wall surface to be treated, a partition wall structure arranged outside the wall-attached structure and separated from the wall-attached structure, and a replacement wall structure arranged outside the partition wall structure and separated from the partition wall structure, wherein the wall-attached structure includes a split keel fixed on the wall surface to be treated for weight increase and vibration collection, the split inner keel includes four disconnected wide square steels on the periphery and a central vibration collection steel mesh, the four square steels are respectively fixed on the wall surface to be treated, The lower, left and right edges, the shock-collecting steel mesh is connected to four square steels on all sides, and the shock-collecting steel mesh is filled with sound-absorbing asbestos for absorbing high-frequency noise; the partition wall structure includes an integrated aluminum alloy frame keel fixed on the ceiling and ground of the wall to be treated, and a sharp-angle sound-returning board is attached to the inner side of the frame keel, and a four-glass, two-laminated and one-hollow sound-proof window is arranged on the outer side of the frame keel; the replacement wall structure is fixed to the gypsum board on the ceiling and ground of the wall to be treated, and a porous sound-absorbing board is attached to the inner side of the gypsum board.
[0007] Furthermore, the spacing between the attached wall structure and the partition wall structure is not less than 120 mm, and the spacing between the partition wall structure and the replacement wall structure is not less than 50 mm.
[0008] Furthermore, the four-glass, two-laminated, and one-hollow soundproof window comprises a frame and four glass panels fixed on the frame and separated from each other, glue is filled between the two outer glass panels, and vacuum treatment is performed between the two central glass panels.
[0009] Furthermore, it also includes a pair of steel U-shaped hole mounting frames fixed on the outer ceiling and ground of the wall to be treated for fixing the partition wall structure, and a pair of alloy L-shaped hole mounting frames fixed on the outer ceiling and ground of the partition wall structure for fixing the replacement wall structure. The steel U-shaped hole mounting frames and the alloy L-shaped hole mounting frames are fixed on the ceiling and ground at corresponding positions by collision bolts.
[0010] Furthermore, a shock-absorbing felt pad is filled between the lower end of the frame keel of the partition wall structure and the top surface of the U-shaped opening mounting frame installed on the ground.
[0011] Specifically, the pointed-angle sound return board adopts a pyramid acoustic soft board made of polyurethane with a thickness of 50 mm.
[0012] Specifically, the four-glass, two-laminated, and one-hollow soundproof window includes a frame and four glass panels fixed on the frame and separated from each other, glue is filled between the two outer glass panels, and vacuum treatment is performed between the two central glass panels.
[0013] Specifically, the porous sound-absorbing plate adopts a diffusion-type 90mm thick polyester fiber material tessellated acoustic plate.
[0014] The construction method of the indoor wall composite sound insulation structure comprises the following steps:
[0015] S1-Wall-attached structure installation: Cut square steel and cut steel mesh according to the size of the wall to be treated, and fix four square steels around the wall to be treated with expansion bolts. When fixing, ensure that the ends of two adjacent square steels do not touch each other; after filling the area inside the square steel with glass fiber sound-absorbing asbestos, weld the steel seismic mesh around the square steel;
[0016] S2-Installation of partition wall structure: A U-shaped opening mounting frame is fixed on the ceiling and the ground at a vertical position not less than 120mm away from the outermost side of the attached wall structure. The U-shaped mounting frame installed on the ceiling is pre-installed with long bolts in the opening before installation; after laying the sharp-angle sound-returning board on the inner side of the frame keel of the partition wall structure, the top rail of the frame keel is aligned and punched, and assembled on the U-shaped opening mounting frame. After the pre-installed bolts pass through the top rail holes, they are tightened one by one on the lower side of the top rail with nuts to complete the hoisting. After alignment, the shock-absorbing felt strips are filled between the low rail of the frame keel and the U-shaped opening mounting frame to fill the gap and play a certain supporting role; the four-glass two-laminated one-hollow soundproof window is fixed as a whole or assembled on the outside of the frame keel;
[0017] S3- Replacement wall structure installation: Measure the vertical position of the outermost side of the partition wall structure at a distance of not less than 50mm, fix an alloy L-shaped hole installation frame on the ceiling and the ground, lay the porous sound-absorbing board on the inner side of the lime board, and make holes on the upper and lower edges, and fix the upper and lower edges of the lime board to the installation frame with bolts;
[0018] S4-Exterior wall treatment: Use putty to smooth the joint gaps around the lime board and fill the bolt holes on the upper and lower edges.
[0019] The composite sound insulation structure of an indoor wall and the construction method thereof of the present invention overcome the defect that the existing treatment method for treating low-frequency noise generated by sound transmission of building structures is not ideal, and the beneficial effect is as follows: by combining the treatment method of changing the physical properties of the wall, coordinating sound absorption and sound insulation, and structural segmentation to block low-frequency propagation, the transmission of high and low frequencies (especially low-frequency noise vibration) is reduced, blocked, and isolated from multiple aspects, and the purpose of isolating and eliminating noise on the noise-generating side is achieved with the maximum effect under the premise of reasonably occupying the use space. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The following is a further description of an indoor wall composite sound insulation structure and a construction method thereof according to the present invention in conjunction with the accompanying drawings:
[0021] Figure 1 It is a schematic diagram of the planar structure of the composite sound insulation structure of the indoor wall;
[0022] Figure 2 yes Figure 1 A partial enlarged view of the middle A area;
[0023] Figure 3 yes Figure 1 Stereoscopic image of
[0024] Figure 4 yes Figure 3 A schematic diagram of a structural explosion;
[0025] Figure 5 yes Figure 4 Rear view of
[0026] Figure 6 yes Figure 3 Schematic diagram of secondary structure explosion;
[0027] Figure 7 yes Figure 7 Rear view of
[0028] Figure 8 is a schematic diagram of the planar structure of the sound-blocking window;
[0029] Fig. 9 This is the AA section view of 8.
[0030] In the figure:
[0031] 0-Wall to be treated;
[0032] 1- wall-attached structure; 11- split keel, 12- sound-absorbing asbestos; 111- square steel, 112- seismic steel mesh;
[0033] 2-wall structure; 21-frame keel, 22-pointed sound-reflecting board, 23-sound-breaking window; 231-frame, 232-four-layer glass panel;
[0034] 3-replacement wall structure; 31-gypsum board, 32-porous sound-absorbing board;
[0035] 4-U-shaped opening mounting frame; 41-shock-absorbing felt pad;
[0036] 5-L-type opening mounting frame;
[0037] 6-Expansion bolts. DETAILED DESCRIPTION
[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0039] In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0040] The technical solution of the present invention is further described below with specific embodiments, but the protection scope of the present invention is not limited to the following embodiments.
[0041] Example 1: Figures 1 to 5 As shown, the indoor wall composite sound insulation structure includes a wall attachment structure 1 fixed on the wall surface 0 to be treated, a partition wall structure 2 arranged outside the wall attachment structure 1 and separated from the wall attachment structure 1, and a replacement wall structure 3 arranged outside the partition wall structure 2 and separated from the partition wall structure 2, wherein the wall attachment structure 1 includes a split keel 11 fixed on the wall surface 0 to be treated for weight increase and vibration collection, and the split inner keel 11 includes four disconnected wide square steels 111 on the periphery and a central vibration collection steel mesh 112, and the four square steels 111 are respectively fixed on the upper and lower sides of the wall surface 0 to be treated. , left and right edges, the shock-collecting steel mesh 112 is connected to four square steels on all sides, and the shock-collecting steel mesh is filled with sound-absorbing asbestos 12 for absorbing high-frequency noise; the partition wall structure 2 includes an integrated aluminum alloy frame keel 21 fixed on the wall surface to be treated 0 ceiling and the ground, and the inner side of the frame keel 21 is attached with a sharp-angled sound-returning board 22 facing inward, and the outer side of the frame keel 21 is provided with a four-glass, two-laminated and one-hollow sound-insulating window 23; the replacement wall structure 3 is fixed to a gypsum board 31 on the wall surface to be treated 0 ceiling and the ground, and a porous sound-absorbing board 32 is attached to the inner side of the gypsum board.
[0042] Example 2: Figure 2 , 6As shown in Figures 7 and 8, the spacing between the wall attachment structure 1 and the partition wall structure 2 in the indoor wall composite sound insulation structure is not less than 120 mm, and the spacing between the partition wall structure 2 and the replacement wall structure 3 is not less than 50 mm. It is used to achieve the minimum air thickness that can achieve medium and low frequency acoustic reflection and low frequency structural isolation. It also includes a group of steel U-shaped hole mounting frames 4 fixed on the ceiling and ground outside the wall surface 0 to be treated for fixing the partition wall structure 2, and a pair of alloy L-shaped hole mounting frames 5 fixed on the ceiling and ground outside the partition wall structure 2 for fixing the replacement wall structure 2. The steel U-shaped hole mounting frames 4 and the alloy L-shaped hole mounting frames 5 are fixed to the ceiling and ground at the corresponding positions by collision bolts 6. A shock-absorbing felt pad 41 is filled between the lower end of the frame keel 21 of the partition wall structure 2 and the top surface of the U-shaped hole mounting frame 4 installed on the ground. The partition wall structure is hoisted as a whole, and while being air-isolated from the inner wall structure, it prevents the remaining low-frequency vibration on the outer keel from effectively penetrating the ceiling and the ground, and further eliminates the rigid connection between the ground frame and the keel body, first ensuring that the sound vibration is not transmitted outward along the ground, and overall weakening its ability to diffuse outward, while giving priority to ensuring the best effect of the wall and ground that can be directly felt by the residents' activity area. The remaining structures and components are as described in Implementation 1 and will not be described again.
[0043] Example 3: Figure 5 , 8As shown in Figure 9, the pointed sound-returning board 22 of the composite sound insulation structure of the indoor wall adopts a pyramid acoustic soft board made of polyurethane with a thickness of 50mm. The pyramid acoustic soft board is an existing sound insulation product, but its current correct usage is to lay it in the sound source room, such as a private theater, a recording studio, etc., to reflect low-frequency noise reduction, while laying it directly on the wall of the space where low-frequency structure-transmitted sound is transmitted has little effect, so it needs to be matched with an air isolation of sufficient thickness and pasted against the wall to achieve the sound insulation effect. The four-glass, two-laminated, and one-hollow sound-breaking window 23 includes a frame 231 and four layers of glass plates 232 fixed on the frame 231 and separated from each other, the outer two layers of glass plates 232 are filled with glue, and the middle two layers of glass plates 232 are vacuumed. This composite glass is an existing product, which is generally used to directly attach to the wall or as a window to achieve the function. It is mostly used for high-frequency noise isolation in spaces such as conference rooms. In this embodiment, the air gap in the frame generated by the frame keel needs to be matched to produce an effective isolation effect on the low frequency. The porous sound-absorbing board 32 is a diffusion-type 90mm thick polyester fiber material with a slotted hole acoustic board. The polyester fiber porous board is a widely used product. The existing application method is mostly to directly attach it to the wall or fix it with a keel after attaching it. The advantage is that it has a good balanced diffusion effect on both high and low frequency sounds, and reduces the intensity of the transmitted noise in an average way. However, the general problem is that the noise cannot be reduced to the expected effect, and because its effect is related to a large number of holes, increasing the thickness cannot significantly improve the noise reduction ability, so it is necessary to cooperate with a certain air isolation and structural separation, and post-process the remaining less noise in each frequency band as an auxiliary to achieve the final diffusion noise reduction.
[0044] Implementation method: Construction method of indoor wall composite sound insulation structure The indoor wall composite sound insulation structure is the indoor wall composite sound insulation structure mentioned above, and its construction method comprises the following steps:
[0045] S1-Wall-attached structure installation: Cut square steel and cut steel mesh according to the size of the wall to be treated, and fix four square steels around the wall to be treated with expansion bolts. When fixing, ensure that the ends of two adjacent square steels do not touch each other; after filling the area inside the square steel with glass fiber sound-absorbing asbestos, weld the steel seismic mesh around the square steel;
[0046] S2-Installation of partition wall structure: A U-shaped opening mounting frame is fixed on the ceiling and the ground at a vertical position not less than 120mm away from the outermost side of the attached wall structure. The U-shaped mounting frame installed on the ceiling is pre-installed with long bolts in the opening before installation; after laying the sharp-angle sound-returning board on the inner side of the frame keel of the partition wall structure, the top rail of the frame keel is aligned and punched, and assembled on the U-shaped opening mounting frame. After the pre-installed bolts pass through the top rail holes, they are tightened one by one on the lower side of the top rail with nuts to complete the hoisting. After alignment, the shock-absorbing felt strips are filled between the low rail of the frame keel and the U-shaped opening mounting frame to fill the gap and play a certain supporting role; the four-glass two-laminated one-hollow soundproof window is fixed as a whole or assembled on the outside of the frame keel;
[0047] S3- Replacement wall structure installation: Measure the vertical position of the outermost side of the partition wall structure at a distance of not less than 50mm, fix an alloy L-shaped hole installation frame on the ceiling and the ground, lay the porous sound-absorbing board on the inner side of the lime board, and make holes on the upper and lower edges, and fix the upper and lower edges of the lime board to the installation frame with bolts;
[0048] S4-Exterior wall treatment: Use putty to smooth the joint gaps around the lime board and fill the bolt holes on the upper and lower edges.
[0049] This sound insulation structure is mainly designed for the types of noise where the sound source cannot be determined or is difficult to locate, the noise is mainly low-frequency, and is caused by structural sound transmission and wall resonance.
[0050] Principle and implementation effect: For the wall to be treated, first use the wall-attached structure to increase the weight of the wall, so that the wall mass undergoes functional changes and reduces resonance. The transmitted high-frequency vibration is absorbed by the sound-absorbing asbestos, and the remaining low-frequency noise is transmitted inward by the square steel to the seismic steel mesh. The square steels are disconnected from each other to eliminate the structural sound transmission between the outer frames of the structure. The steel mesh is used to block and attract asbestos, and the hollow structure is used to diffuse the low-frequency structural sound and reduce and isolate the solid area that can support sound transmission; a spacing space of no less than 120mm is left between the wall-attached structure and the partition wall structure, and the upper and lower structures are not connected, using the empty The air-break vibration propagates outward, and the part of the low-frequency vibration that can penetrate the air barrier encounters the return sound board and is reflected inward in an undirected manner, further trapping the low frequency back into the gap, or in other words, most of the low-frequency waves are retained on the inner side of the partition wall and consumed by the air in the gap. There is no filler on the outer keel of the partition wall structure, which further consumes the low frequency. The remaining low frequency that cannot be consumed is completely isolated by the four-glass, two-laminated and one hollow sound-breaking window; finally, the few small amounts of high- and low-frequency mixed noise that penetrate are absorbed and diffused through the gaps in the porous plate on the inner side of the gypsum board to a volume that does not affect normal life. The outermost layer of gypsum board is used to form a new exterior wall surface to cover the internal structure. This structure has three layers of composite sound insulation structure separated from each other. By changing the physical properties such as wall mass and shape, changing and reducing the indoor space area, and absorbing the medium and high frequency areas of noise, the low frequency areas from structure-transmitted sound are subjected to multiple structural segmentation and reduction, separation air reduction, reflection and back trapping, blocking and other treatments to comprehensively weaken and eliminate the noise transmitted from the wall. After completion in practice, the sound level meter was attached to the exterior wall gypsum board for inspection. The high-frequency area was less than 40dB, and the penetrable frequency was lower than 20Hz, which belonged to the infrasound range, meeting the sound insulation effect that did not affect life. Excluding labor, the average cost per square meter was less than 400 yuan, which has practical application value.
[0051] The composite sound insulation structure of the indoor wall and its construction method overcome the defect that the existing treatment method for low-frequency noise generated by building structure sound transmission is not ideal. It combines the treatment methods of changing the physical properties of the wall, coordinating sound absorption and sound insulation, and structural segmentation to block low-frequency propagation. It reduces, blocks, and isolates the transmission of high and low frequencies (especially low-frequency noise vibration) from many aspects. Under the premise of reasonably occupying the use space, the effect is maximized to achieve the purpose of isolating and eliminating noise on the noise-generating side.
[0052] The above description shows the main features, basic principles, and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments or embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, the above embodiments or embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.
[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A composite sound insulation structure for indoor walls, characterized by: The invention comprises a wall attachment structure (1) fixed on a wall surface (0) to be treated, a partition wall structure (2) arranged outside the wall attachment structure (1) and separated from the wall attachment structure (1), and a replacement wall structure (3) arranged outside the partition wall structure (2) and separated from the partition wall structure (2), wherein: The wall-attached structure (1) comprises a split keel (11) fixed on the wall surface (0) to be treated for weight increase and vibration collection, the split inner keel (11) comprises four disconnected wide square steels (111) on the periphery and a central vibration collection steel mesh (112), the four square steels (111) are respectively fixed on the upper, lower, left and right edges of the wall surface (0) to be treated, the vibration collection steel mesh (112) is connected to the four square steels on all sides, and the vibration collection steel mesh is filled with sound-absorbing asbestos (12) for absorbing high-frequency noise; The partition wall structure (2) comprises an integrated aluminum alloy frame keel (21) fixed on the ceiling and the ground of the wall surface (0) to be treated, a sharp-angle sound-reflecting board (22) is attached inwardly to the inner side of the frame keel (21), and a four-glass, two-laminated, and one-hollow sound-proof window (23) is provided on the outer side of the frame keel (21); The replacement wall structure (3) is fixed to a gypsum board (31) on the ceiling and the ground of the wall surface (0) to be treated, and a porous sound-absorbing board (32) is attached to the inner side of the gypsum board.
2. The indoor wall composite sound insulation structure according to claim 1 is characterized in that: The distance between the wall attachment structure (1) and the partition wall structure (2) is not less than 120 mm, and the distance between the partition wall structure (2) and the replacement wall structure (3) is not less than 50 mm.
3. The indoor wall composite sound insulation structure according to claim 2 is characterized in that: It also includes a pair of steel U-shaped hole mounting frames (4) fixed on the outer ceiling and ground of the wall surface to be treated (0) for fixing the partition wall structure (2), and a pair of alloy L-shaped hole mounting frames (5) fixed on the outer ceiling and ground of the partition wall structure (2) for fixing the replacement wall structure (2). The steel U-shaped hole mounting frames (4) and the alloy L-shaped hole mounting frames (5) are fixed to the ceiling and ground at corresponding positions by collision bolts (6).
4. The indoor wall composite sound insulation structure according to claim 3 is characterized in that: A shock-absorbing felt pad (41) is filled between the lower end of the frame keel (21) of the partition wall structure (2) and the top surface of the U-shaped opening mounting frame (4) installed on the ground.
5. The indoor wall composite sound insulation structure according to claim 4 is characterized in that: The pointed sound return board (22) is a pyramid acoustic soft board made of polyurethane with a thickness of 50 mm.
6. The indoor wall composite sound insulation structure and construction method thereof according to claim 5 is characterized in that: The four-glass, two-laminated, and one-hollow soundproof window (23) comprises a frame (231) and four layers of glass plates (232) fixed on the frame (231) and separated from each other, with glue being filled between the outer two layers of glass plates (232) and vacuuming being performed between the central two layers of glass plates (232).
7. The indoor wall composite sound insulation structure according to claim 6 is characterized in that: The porous sound-absorbing plate (32) is a diffusion-type 90 mm thick polyester fiber material tessellated hole acoustic plate.
8. A construction method for an indoor wall composite sound insulation structure, characterized by: The indoor wall composite sound insulation structure is the indoor wall composite sound insulation structure according to any one of claims 1 to 7, and its construction method comprises the following steps: S1-Wall-attached structure installation: Cut square steel and cut steel mesh according to the size of the wall to be treated, and fix four square steels around the wall to be treated with expansion bolts. When fixing, ensure that the ends of two adjacent square steels do not touch each other; after filling the area inside the square steel with glass fiber sound-absorbing asbestos, weld the steel seismic mesh around the square steel; S2-Installation of partition wall structure: A U-shaped opening mounting frame is fixed on the ceiling and the ground at a vertical position not less than 120mm away from the outermost side of the attached wall structure. The U-shaped mounting frame installed on the ceiling is pre-installed with long bolts in the opening before installation; after laying the sharp-angle sound-returning board on the inner side of the frame keel of the partition wall structure, the top rail of the frame keel is aligned and punched, and assembled on the U-shaped opening mounting frame. After the pre-installed bolts pass through the top rail holes, they are tightened one by one on the lower side of the top rail with nuts to complete the hoisting. After alignment, the shock-absorbing felt strips are filled between the low rail of the frame keel and the U-shaped opening mounting frame to fill the gap and play a certain supporting role; the four-glass two-laminated one-hollow soundproof window is fixed as a whole or assembled on the outside of the frame keel; S3- Replacement wall structure installation: Measure the vertical position of the outermost side of the partition wall structure at a distance of not less than 50mm, fix an alloy L-shaped hole installation frame on the ceiling and the ground, lay the porous sound-absorbing board on the inner side of the lime board, and make holes on the upper and lower edges, and fix the upper and lower edges of the lime board to the installation frame with bolts; S4-Exterior wall treatment: Use putty to smooth the joint gaps around the lime board and fill the bolt holes on the upper and lower edges.