Composite soundproof door for high-sound-intensity reverberation room

Abstract

The invention provides a composite soundproof door for a high-sound-intensity reverberation room, which comprises a door body, and the door body comprises an outer plate, a first concrete layer, a first partition plate, a sound absorption material layer, a second partition plate, a second concrete layer and an inner plate which are sequentially stacked in the thickness direction of the door body; wherein the outer plate is arranged towards the outside of the high-sound-intensity reverberation chamber in the assembling state, and the inner plate is arranged towards the inside of the high-sound-intensity reverberation chamber in the assembling state. The soundproof door provided by the invention not only can realize a higher sound insulation factor, but also has excellent structural strength and lower total weight, and is suitable for test environments with extreme sound pressure level requirements, such as a high-sound-intensity reverberation room and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acoustic testing, in particular to a composite sound insulation door for a high sound intensity anechoic chamber. BACKGROUND

[0002] A high sound intensity anechoic chamber is a key infrastructure for spacecraft acoustic testing, material testing and product reliability verification. The anechoic chamber can generate extremely high sound pressure levels to simulate a harsh noise environment, and the typical test sound pressure level is usually more than 150 dB. In order to ensure the accuracy and reliability of the test data, the anechoic chamber needs to have extremely high acoustic insulation performance to prevent internal sound energy from leaking outward. Compared with general sound insulation doors for buildings, the sound insulation door of a high sound intensity anechoic chamber not only needs to provide higher sound insulation, but also needs to have sufficient structural strength. Therefore, the anechoic chamber needs to be provided with a special high-performance sound insulation door. SUMMARY

[0003] The present application provides a composite sound insulation door for a high sound intensity anechoic chamber, which is suitable for test environments with extreme sound pressure level requirements such as high sound intensity anechoic chambers.

[0004] To achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions.

[0005] In a first aspect, the embodiments of the present application provide a composite sound insulation door for a high sound intensity anechoic chamber, comprising a door body, the door body comprising an outer plate, a first concrete layer, a first partition plate, a sound-absorbing material layer, a second partition plate, a second concrete layer and an inner plate which are sequentially stacked in the thickness direction of the door body; wherein the outer plate is arranged to face the outside of the high sound intensity anechoic chamber in the assembled state, and the inner plate is arranged to face the inside of the high sound intensity anechoic chamber in the assembled state.

[0006] In some embodiments, the outer plate and the inner plate are made of metal material, and the resonance frequencies of the outer plate and the inner plate do not overlap.

[0007] In some embodiments, the thickness of the outer plate is 3-5 mm greater than the thickness of the inner plate.

[0008] In some embodiments, the thickness of the first concrete layer and the second concrete layer is 100-150 mm, and the first concrete layer and the second concrete layer are made of concrete with a strength grade of C30, C35 or C40.

[0009] In some embodiments, the first partition plate and the second partition plate are made of metal material, and are used to constrain the flow of concrete during pouring of the first concrete layer and the second concrete layer.

[0010] In some embodiments, the sound-absorbing material in the sound-absorbing material layer is one or more of glass fiber, sound-absorbing cotton, rock wool, or foamed metal.

[0011] In some embodiments, the door body is further provided with a reinforcing rib structure penetrating through along the thickness direction of the door body, the reinforcing rib structure penetrating through the outer plate, the first concrete layer, the first partition plate, the sound-absorbing material layer, the second partition plate, the second concrete layer and the inner plate in sequence.

[0012] In some embodiments, the reinforcing rib structure is fixedly connected with the first partition plate and the second partition plate.

[0013] In a second aspect, the application further provides an assembling method of a composite sound-insulation door for a high-sound-intensity reverberation chamber, comprising:

[0014] providing an initial door body to be assembled, the initial door body comprising an outer plate, a first partition plate, a sound-absorbing material layer, a second partition plate and an inner plate stacked in sequence along the thickness direction of the door body; wherein a gap for forming a concrete layer is reserved between the outer plate and the first partition plate, and between the inner plate and the second partition plate; the initial door body is further provided with a reinforcing rib structure penetrating through along the thickness direction of the door body, the reinforcing rib structure penetrating through the outer plate, the first partition plate, the sound-absorbing material layer, the second partition plate and the inner plate in sequence, both ends of the reinforcing rib structure being provided with a threaded structure, and further provided with a nut matched with the threaded structure;

[0015] casting concrete between the outer plate and the first partition plate to form a first concrete layer, and casting concrete between the inner plate and the second partition plate to form a second concrete layer;

[0016] before the concrete solidification is completed, adjusting the surface flatness of the outer plate and the inner plate by adjusting the position of the nut at both ends of the reinforcing rib structure;

[0017] after the concrete solidification is completed, fixedly connecting the reinforcing rib structure with the outer plate and the inner plate.

[0018] In a third aspect, the embodiments of the application provide a high-sound-intensity reverberation chamber, the high-sound-intensity reverberation chamber being provided with the composite sound-insulation door, and the sound pressure level inside the high-sound-intensity reverberation chamber being greater than or equal to 150 dB.

[0019] Compared with the prior art, the composite sound-insulation door provided by the embodiments of the application can maintain stable and high sound-insulation performance even if the sound-absorbing material settles to a certain extent, and the overall sound-insulation amount can meet the dual requirements of sound insulation and structural strength of the high-sound-intensity reverberation chamber. BRIEF DESCRIPTION OF DRAWINGS

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the internal structure of an optional composite soundproof door for a high-intensity reverberation chamber according to an embodiment of this application.

[0022] In the attached drawings: composite soundproof door 100; outer panel 101; first concrete layer 102; first partition 103; sound-absorbing material layer 104; second partition 105; second concrete layer 106; inner panel 107; tie rod structure 110; internal connection point 111; surface connection point 113. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “said,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0025] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0026] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the article or device that includes said element.

[0027] As described in the background section, existing soundproof door structures are primarily designed for architectural acoustics or general laboratory environments, and are deficient in terms of sound insulation, structural strength, stability, and sealing. Existing soundproof doors are insufficient to meet the requirements of high-intensity reverberation chambers.

[0028] A high-intensity reverberation chamber is a specialized acoustic testing facility designed to generate extremely high sound pressure levels and conduct acoustic fatigue tests. High-intensity reverberation chambers typically employ high-strength structures such as reinforced concrete and are equipped with high-power sound source arrays, enabling the total sound pressure level within the chamber to reach 150 dB or even higher. High-intensity reverberation chambers are commonly used for acoustic fatigue and acoustic load testing of entire spacecraft systems and critical components to assess the reliability of the tested structure in extreme acoustic environments.

[0029] Unlike ordinary personnel access doors, the doors of high-intensity reverberation chambers have large openings and do not need to be opened frequently. They are typically used only for the entry and exit of various large test equipment (such as spacecraft). Traditional soundproof door structures cannot meet the special requirements of high-intensity reverberation chambers. A large, specialized soundproof door is needed that can provide extremely high sound insulation performance while ensuring that the overall structural strength is sufficient to match the walls of the reverberation chamber.

[0030] To address the aforementioned problems, one aspect of this application provides a composite soundproof door for a high-intensity reverberation chamber, comprising a door body, the door body including an outer panel, a first concrete layer, a first partition, a sound-absorbing material layer, a second partition, a second concrete layer, and an inner panel stacked sequentially along the thickness direction of the door body; wherein, the outer panel is disposed facing the outside of the high-intensity reverberation chamber in the assembled state, and the inner panel is disposed facing the inside of the high-intensity reverberation chamber in the assembled state.

[0031] Compared with the prior art, the composite soundproof door provided in this application, through the reasonable combination of multiple layers, can still maintain stable and high sound insulation performance even when the sound-absorbing material settles to a certain extent. The overall sound insulation can meet the dual requirements of sound insulation and structural strength of high-intensity reverberation chambers.

[0032] To enable those skilled in the art to better understand and implement this application, the concept, principles, and advantages of this application are described in detail below through specific embodiments and in conjunction with specific application scenarios and accompanying drawings.

[0033] The composite soundproof door for a high-intensity reverberation chamber provided in the embodiments of this application will be described in detail below.

[0034] refer to Figure 1This embodiment provides a composite soundproof door 100 for a high-intensity reverberation chamber, which is installed at the equipment access point on the wall of the high-intensity reverberation chamber. The door body of the composite soundproof door 100 is a multi-layered composite soundproof structure, including an outer plate 101, a first concrete layer 102, a first partition 103, a sound-absorbing material layer 104, a second partition 105, a second concrete layer 106, and an inner plate 107, stacked sequentially from the outside to the inside along the thickness direction of the door body. It should be noted that the concepts of "inner" and "outer" in this specification are defined with reference to the internal space of the high-intensity reverberation chamber; that is, the side facing the inside of the reverberation chamber is called the inner side, and the side facing the outside of the reverberation chamber is called the outer side. Therefore, the outer plate 101 refers to the steel plate facing the outside of the reverberation chamber, while the inner plate 107 refers to the steel plate facing the inside of the reverberation chamber.

[0035] The outer panel 101 and inner panel 107 are made of metal materials, such as steel plates. The specific material selection can be determined according to the usage environment and performance requirements of the soundproof door 100. The outer panel 101 and inner panel 107 have high strength and can withstand the extreme sound pressure difference from the high-intensity reverberation chamber, ensuring the stability of the door structure.

[0036] In some embodiments, the outer panel 101 is thicker than the inner panel 107. For example, the outer panel 101 can be 12-16 mm thick, and the inner panel 107 can be 8-12 mm thick. Typically, the outer panel 101 is 3-5 mm thicker than the inner panel 107. The thicker outer panel 101 helps enhance the door's compressive strength, effectively withstanding the sound pressure of a high-intensity reverberation chamber, while the thinner inner panel 107 reduces the door's weight. Furthermore, this thickness difference between the outer panel 101 and the inner panel 107 effectively avoids the coincidence valley effect caused by material resonance. That is, by intentionally setting the thickness difference between the outer panel 101 and the inner panel 107, the resonant frequencies of the outer panel 101 and the inner panel 107 do not overlap, thereby avoiding a significant decrease in sound insulation performance within a specific frequency band. Through this differentiated thickness design, the combination of the outer panel 101 and the inner panel 107 ensures that the door maintains good sound insulation performance across all frequency bands, meeting the dual requirements of sound insulation and structural strength for a high-intensity reverberation chamber.

[0037] The first concrete layer 102 is disposed between the outer panel 101 and the first partition 103, and the second concrete layer 106 is disposed between the second partition 105 and the inner panel 107. The first concrete layer 102 and the second concrete layer 106 can be arranged symmetrically. The first concrete layer 102 and the second concrete layer 106 are formed by concrete casting. The first concrete layer 102 and the second concrete layer 106 are mainly used to enhance the overall strength of the door and prevent the door from deforming due to excessive internal pressure in high-noise environments. In addition, the first concrete layer 102 and the second concrete layer 106 also help to improve the sound insulation performance of the door, effectively blocking the propagation of sound waves and further enhancing the sound insulation effect of the door.

[0038] In some embodiments, the grade or thickness of the first concrete layer 102 and the second concrete layer 106 can be appropriately increased according to the sound insulation requirements, thereby further enhancing the structural strength of the door and increasing the overall surface density, thus improving the sound insulation capability in the mid-to-low frequency range. For example, the first concrete layer 102 and the second concrete layer 106 can be selected from strength grades such as C30, C35, or C40. The thickness of each of the first concrete layer 102 and the second concrete layer 106 can be set to 100-150mm. By setting a reasonable thickness, it can be ensured that the door can withstand the extremely high sound pressure difference of the high-intensity reverberation chamber.

[0039] The first partition 103 is disposed on the side of the first concrete layer 102 away from the outer plate 101. The second partition 105 is disposed on the side of the second concrete layer 106 away from the inner plate 107. The first partition 103 and the second partition 105 can be arranged substantially symmetrically. The first partition 103 and the second partition 105 can be made of metal materials, such as steel plates. The first partition 103 is used to constrain the flow direction of concrete during the pouring of the first concrete layer 102, ensuring that the concrete is poured and cured uniformly. The second partition 105 is used to constrain the flow direction of concrete during the pouring of the second concrete layer 106, ensuring that the concrete is poured and cured uniformly. The thickness of each of the first partition 103 and the second partition 105 can be in the range of 4 to 5 mm.

[0040] The sound-absorbing material layer 104 is located between the first partition 103 and the second partition 105. The sound-absorbing material in the sound-absorbing material layer 104 can be one or more of glass fiber, sound-absorbing cotton, rock wool, and foamed metal. The sound-absorbing material has a high sound absorption coefficient, which can effectively reduce the propagation of sound waves and improve the sound insulation effect of the door in high-intensity sound environments. Selecting moisture-proof, lightweight, and non-corrosive materials allows the performance of the sound-absorbing material to be fully utilized. Selecting a wide-bandwidth material with a high sound absorption coefficient can increase the overall sound insulation of the door. The thickness of the sound-absorbing material layer 104 can be set according to the overall thickness of the door and the thickness of other structural layers within the door.

[0041] By providing a sound-absorbing material layer 104 between the first partition 103 and the second partition 105, the overall weight of the door can be reduced while ensuring the overall structural strength of the door, and the sound insulation of the door can be further improved. In some embodiments, even if the sound-absorbing material layer 104 settles due to long-term use, the composite soundproof door 100 provided by the present invention can still maintain high sound insulation performance, and the overall sound insulation of the door can still be greater than 50dB. Through the synergistic effect of the multi-layer composite structure, the sound insulation performance of the door does not depend entirely on the sound-absorbing material layer 104, thereby effectively avoiding the decrease in sound insulation effect due to the attenuation of the sound-absorbing material performance, and ensuring that the soundproof door has a stable sound insulation effect during long-term use.

[0042] In some embodiments, the door body is further provided with a tie rod structure 110 extending along the thickness direction of the door body to further enhance the overall strength of the door body and adjust the flatness of the door body surface. The tie rod structure 110 sequentially extends along the thickness direction of the door body through the outer panel 101, the first concrete layer 102, the first partition 103, the sound-absorbing material layer 104, the second partition 105, the second concrete layer 106, and the inner panel 107. In some embodiments, the tie rod structure 110 is made of threaded steel. The spacing of the tie rod structure 110 can be determined comprehensively based on the overall dimensions of the door body, and the spacing is usually set to 400-500mm.

[0043] In some embodiments, the tie rod structure 110 passes through the first partition 103 and the second partition 105 located inside the door body, and is fixedly connected to the first partition 103 and the second partition 105 to form an internal connection point 111, thereby creating a stable load-bearing structure inside the door body. In some embodiments, the fixed connection between the tie rod structure 110 and the first partition 103 and the second partition 105 can be achieved by full welding.

[0044] In some embodiments, the tie rod structure 110 has threaded structures at both ends, and further provided with nuts that mate with the threaded structures. Before the concrete layer has cured, the surface flatness of the outer panel 101 and the inner panel 107 can be adjusted by adjusting the position of the nuts at both ends of the tie rod structure 110 to compensate for dimensional deviations or local unevenness that may occur during concrete pouring, thereby improving the overall assembly accuracy of the door. After the concrete has been poured and cured, the door structure is basically stable. At this time, the tie rod structure 110 is fixedly connected to the outer panel 101 and the inner panel 107 to form surface connection points 113. In some embodiments, a full welding connection can be used to achieve a reliable connection between the tie rod structure 110 and the outer panel 101 and the inner panel 107, so that the tie rod structure 110 and each structural layer of the door form an integral load-bearing structure.

[0045] After the tie rod structure 110 is fixedly connected to the outer panel 101 and the inner panel 107, the nuts and exposed portions of the tie rod structure 110 can be cut off, making the ends of the tie rod structure 110 flush with the outer surfaces of the outer panel 101 and the inner panel 107. Furthermore, the cut areas can be ground and polished to further improve the smoothness of the outer surface of the door.

[0046] As a specific example, the composite soundproof door can be assembled using the following method. First, an initial door body to be assembled is provided, comprising an outer panel, a first partition, a sound-absorbing material layer, a second partition, and an inner panel stacked sequentially along the door body's thickness direction. Gaps for forming concrete layers are reserved between the outer panel and the first partition, and between the inner panel and the second partition. The initial door body also includes a tie rod structure extending through the door body's thickness direction, sequentially passing through the outer panel, the first partition, the sound-absorbing material layer, the second partition, and the inner panel. The tie rod structure has threaded ends and nuts that mate with these threads. Concrete is poured between the outer panel and the first partition to form a first concrete layer. Concrete is poured between the inner panel and the second partition to form a second concrete layer. Before the concrete cures, the surface flatness of the outer panel and the inner panel is adjusted by adjusting the positions of the nuts at both ends of the tie rod structure. After the concrete cures, the tie rod structure is fixedly connected to the outer panel and the inner panel.

[0047] This application further provides a high-intensity reverberation chamber, wherein the high-intensity reverberation chamber is equipped with the aforementioned composite soundproof door. The sound pressure level inside the high-intensity reverberation chamber is greater than or equal to 150 dB.

[0048] Example 1

[0049] To enable those skilled in the art to better understand the technical solution of this application, a composite soundproof door structure provided in the embodiments of this application will be further described in detail below.

[0050] In this embodiment, the composite soundproof door adopts a multi-layer composite structure, which includes, from the inside out: an inner panel, a first concrete layer, a first partition, a sound-absorbing material layer, a second partition, a second concrete layer, and an outer panel.

[0051] The materials and thicknesses of each layer are as follows: the inner plate is a 10mm thick steel plate, the first concrete layer is a 100mm thick C30 concrete, the first partition is a 4mm thick steel plate, the sound-absorbing material layer is a 218mm thick glass wool with a density of 32kg / m3, the second partition is a 4mm thick steel plate, the second concrete layer is a 100mm thick C30 concrete, and the outer plate is a 14mm thick steel plate.

[0052] In this embodiment, the density of the steel plate material is taken as 7850 kg / m³. 3 The density of concrete material is taken as 2500 kg / m³. 3 The air density is taken as 1.29 kg / m³. 3 It is assumed that the two layers of steel plates in the door are connected by rigid points.

[0053] Based on the above structural and material parameters, the sound insulation performance of the door is estimated. According to an empirical engineering formula, the overall sound insulation of the composite soundproof door is:

[0054]

[0055] (M1+M2>200kg / m 2 )

[0056] Wherein, M1 and M2 are the areal densities (kg / m²) of the main load-bearing plates on both sides, respectively. 2 ); ΔR is the additional sound insulation produced by the intermediate air layer. If the 250mm cavity layer is filled with high-density sound-absorbing material (such as 32kg / m³), 3 The material is rock wool, and a multi-layered discontinuous structure is used, which may add 10-15 dB of sound insulation. The value used in this calculation is 12 dB.

[0057] The average sound insulation of the composite soundproof door was finally obtained. This value can meet the sound insulation requirements of high-intensity reverberation chambers (usually ≥50dB) and can effectively suppress the leakage of 150dB level sound pressure from inside the chamber.

[0058] Compared to existing technologies, the composite soundproof door provided in this application adopts a multi-layer composite structure. By sequentially setting steel plate layers, concrete layers, and sound-absorbing material layers of different thicknesses in the door body, an effective balance is achieved between the overall structural strength, surface density, and sound insulation performance. On the one hand, the concrete layer and the steel plate layer work together to form a high-rigidity, high-surface-density load-bearing structure, which can withstand extremely high sound pressure loads in a high-intensity reverberation chamber environment. On the other hand, the introduction of sound-absorbing material layers between the steel plate layers can effectively absorb and attenuate the sound energy inside the door body, further improving the sound insulation without significantly increasing the weight of the door body.

[0059] The composite soundproof door provided in this application, through a reasonable combination of multiple layers, can maintain stable and high sound insulation performance even when the sound-absorbing material settles to a certain extent. The overall sound insulation can meet the dual requirements of sound insulation and structural strength for high-intensity reverberation chambers.

[0060] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems or apparatus described in the embodiments, since they correspond to the methods described in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0061] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A composite soundproof door for a high-intensity reverberation chamber, characterized in that, The system includes a door body, which comprises an outer panel, a first concrete layer, a first partition, a sound-absorbing material layer, a second partition, a second concrete layer, and an inner panel, which are stacked sequentially along the thickness direction of the door body; wherein, the outer panel faces the outside of the high-intensity reverberation chamber in the assembled state, and the inner panel faces the inside of the high-intensity reverberation chamber in the assembled state.

2. The composite soundproof door for a high-intensity reverberation chamber according to claim 1, characterized in that, The outer plate and the inner plate are made of metal, and the resonant frequencies of the outer plate and the inner plate do not overlap.

3. The composite soundproof door for a high-intensity reverberation chamber according to claim 1 or 2, characterized in that, The thickness of the outer panel is 3 to 5 mm greater than the thickness of the inner panel.

4. The composite soundproof door for a high-intensity reverberation chamber according to claim 1, characterized in that, The thickness of the first concrete layer and the second concrete layer is 100-150 mm, and the first concrete layer and the second concrete layer are made of concrete with a strength grade of C30, C35 or C40.

5. The composite soundproof door for a high-intensity reverberation chamber according to claim 1, characterized in that, The first and second partitions are made of metal and are used to constrain the flow direction of concrete during the pouring of the first and second concrete layers.

6. The composite soundproof door for a high-intensity reverberation chamber according to claim 1, characterized in that, The sound-absorbing material in the sound-absorbing material layer is one or more of glass fiber, sound-absorbing cotton, rock wool, or foamed metal.

7. The composite soundproof door for a high-intensity reverberation chamber according to claim 1, characterized in that, The door body is also provided with a tie rod structure that runs through the door body along its thickness direction. The tie rod structure passes through the outer plate, the first concrete layer, the first partition, the sound-absorbing material layer, the second partition, the second concrete layer and the inner plate in sequence.

8. The composite soundproof door for a high-intensity reverberation chamber according to claim 1, characterized in that, The tie rod structure is fixedly connected to the first partition and the second partition.

9. A method for assembling a composite soundproof door for a high-intensity reverberation chamber, characterized in that, include: An initial door body to be assembled is provided, the initial door body comprising an outer panel, a first partition, a sound-absorbing material layer, a second partition, and an inner panel stacked sequentially along the thickness direction of the door body; wherein, gaps for forming concrete layers are reserved between the outer panel and the first partition, and between the inner panel and the second partition; the initial door body is also provided with a tie rod structure extending through the door body along the thickness direction, the tie rod structure sequentially passing through the outer panel, the first partition, the sound-absorbing material layer, the second partition, and the inner panel, and both ends of the tie rod structure are provided with threaded structures, and nuts that mate with the threaded structures are further provided; Concrete is poured between the outer panel and the first partition to form a first concrete layer; concrete is poured between the inner panel and the second partition to form a second concrete layer. Before the concrete has cured, the surface flatness of the outer plate and the inner plate is adjusted by adjusting the position of the nuts at both ends of the tie structure. After the concrete has cured, the tie structure is fixedly connected to the outer plate and the inner plate.

10. A high-intensity reverberation chamber, characterized in that, The high-intensity reverberation chamber is equipped with a composite soundproof door according to any one of claims 1-8, and the sound pressure level inside the high-intensity reverberation chamber is greater than or equal to 150 dB.

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