Sound-absorbing suspended ceiling board

Abstract

The utility model relates to the technical field of architectural acoustic design, and discloses a sound-absorbing suspended ceiling board, which is characterized in that a plurality of sound-absorbing holes are arrayed on a first sound-absorbing board and used for concentrating sound waves, so that the absorption of low-frequency noise and high-frequency noise is facilitated; sound waves penetrate through the sound absorption holes, are absorbed by the sound absorption cotton and then pass through the third sound absorption plate, and the third sound absorption plate continuously absorbs low-frequency and high-frequency sound waves (the sound waves penetrate through the sound absorption cotton, are reflected at through holes in the bottom wall of the third sound absorption plate and are absorbed again, so that the sound wave absorption effect is improved); part of the sound waves are continuously absorbed by the second sound absorption plate after penetrating through the third sound absorption plate; through multiple times of absorption, low-frequency and high-frequency sound wave energy is absorbed and dissipated layer by layer, the problem that a traditional sound absorption board cannot be dissipated and absorbed due to too large sound wave energy in the using process is effectively solved, indoor noise reflection and propagation are reduced as much as possible, the good sound absorption effect is achieved, and the definition and the tone quality of music are improved.

Description

Technical Field

[0001] This utility model relates to the field of architectural acoustic design technology, and in particular to a sound-absorbing ceiling panel. Background Technology

[0002] Ceiling acoustic panels are a new type of ceiling decoration material made primarily of mineral wool, with the addition of appropriate amounts of binders, moisture-proofing agents, and preservatives. They are processed, dried, and finished. Traditional concert hall ceiling acoustic panels, due to their light weight, cannot fully absorb and dissipate sound waves of excessive energy, resulting in reverberation after multiple reflections within the concert hall. Excessive reverberation time affects the clarity and sound quality of the music. To improve sound absorption (reduce sound wave reflection within the concert hall), measures such as increasing the average thickness, pouring a certain thickness of concrete, or complicating the entire ceiling structure are commonly used. Heavier acoustic ceilings and panels have complex structures, are difficult to install, have long construction periods, and high construction costs. Utility Model Content

[0003] The purpose of this utility model is to provide a sound-absorbing ceiling panel to solve the problem that existing ceiling sound-absorbing panels cannot improve sound wave absorption while maintaining the lightweight nature of the material.

[0004] To achieve the above objectives, this application provides a sound-absorbing ceiling panel having a first direction, a second direction, and a third direction, characterized in that it includes:

[0005] A first sound-absorbing panel has a plurality of sound-absorbing holes through it along the third direction, and the plurality of sound-absorbing holes are arrayed and distributed on the first sound-absorbing panel.

[0006] A second sound-absorbing panel is connected to the first sound-absorbing panel, and the first and second sound-absorbing panels are spaced apart along the third direction; the side of the second sound-absorbing panel facing away from the first sound-absorbing panel is fixed to the top of the building.

[0007] A third sound-absorbing panel is fixedly connected to the bottom wall of the second sound-absorbing panel. The bottom wall of the third sound-absorbing panel has multiple through holes along the second direction, and the multiple through holes are spaced apart along the first direction. The third sound-absorbing panel and the first sound-absorbing panel are spaced apart along the third direction. Sound-absorbing cotton is disposed between the third sound-absorbing panel and the first sound-absorbing panel, and the sound-absorbing cotton abuts against the top wall of the first sound-absorbing panel and the bottom wall of the third sound-absorbing panel on both sides along the third direction.

[0008] In some embodiments of this application, the perforation is arranged in a triangular shape.

[0009] In some embodiments of this application, the third sound-absorbing panel includes a plurality of strip-shaped sound-absorbing panels extending along the second direction. The plurality of strip-shaped sound-absorbing panels are inclined along the first direction. The end of each strip-shaped sound-absorbing panel facing the second sound-absorbing panel has a flat portion. The flat portion of each of the plurality of strip-shaped sound-absorbing panels is connected to the bottom wall of the second sound-absorbing panel.

[0010] Multiple strip-shaped sound-absorbing panels are sequentially attached and connected along the first direction, and the ends of two adjacent strip-shaped sound-absorbing panels away from the second sound-absorbing panel form the perforation.

[0011] In some embodiments of this application, the sound-absorbing ceiling panel further includes two connecting plates spaced apart along the first direction, with the first sound-absorbing plate, the second sound-absorbing plate, the third sound-absorbing plate, and the sound-absorbing cotton sandwiched between the two connecting plates; the first sound-absorbing plate, the second sound-absorbing plate, and the third sound-absorbing plate are respectively attached and connected to the two connecting plates along their two sides along the first direction.

[0012] In some embodiments of this application, the sound-absorbing ceiling panel further includes a telescopic component connected to the side of the second sound-absorbing panel away from the first sound-absorbing panel, and the other end of the telescopic component is connected to the top of the building.

[0013] In some embodiments of this application, the telescopic component includes a fixed rod connected to the top of the building and a movable rod connected to a second sound-absorbing panel. The movable rod is sleeved on the outer periphery of the fixed rod and can move axially along the fixed rod.

[0014] The movable rod is provided with a positioning component, which is used to limit the axial movement of the movable rod relative to the fixed rod.

[0015] In some embodiments of this application, a sliding cavity is provided along the axial direction of the movable rod, the inner diameter of the sliding cavity is larger than the outer diameter of the fixed rod, the top of the sliding cavity is provided with a through hole for the fixed rod to pass through upward, and the bottom of the fixed rod is provided with a stop plate that fits and contacts the wall of the sliding cavity.

[0016] The diameter of the through hole is between the inner diameter of the sliding cavity and the outer diameter of the fixing rod.

[0017] In some embodiments of this application, the positioning component includes an externally threaded cylinder coaxially mounted on the upper end of the movable rod, and the externally threaded cylinder is spaced apart from the fixed rod.

[0018] A rubber ring is coaxially connected to the upper end of the external threaded cylinder. The rubber ring has a large-diameter end away from the external threaded cylinder and a small-diameter end connected to the external threaded cylinder. An abutment ring is threaded onto the external threaded cylinder.

[0019] Rotate the abutment ring, and the abutment ring moves toward the large-diameter end. The abutment ring radially presses against the outer wall of the rubber ring, causing the rubber ring to contract radially.

[0020] In some embodiments of this application, a plurality of shrinkage grooves are provided at intervals along the circumference of the rubber ring, the shrinkage grooves are arranged radially through the rubber ring, and the shrinkage grooves extend upward through the large diameter end.

[0021] In some embodiments of this application, the first sound-absorbing plate, the second sound-absorbing plate, and the third sound-absorbing plate are all gypsum board components.

[0022] Compared with the prior art, the beneficial effects of this embodiment of the sound-absorbing ceiling panel are as follows: Multiple sound-absorbing holes are arranged in an array on the first sound-absorbing panel to concentrate sound waves, which is beneficial for absorbing low-frequency noise and high-frequency interference. After the sound waves pass through the sound-absorbing holes and are absorbed by the sound-absorbing cotton, they pass through the third sound-absorbing panel, which continues to absorb low-frequency and high-frequency sound waves (the sound waves are reflected at the perforations on the bottom wall of the third sound-absorbing panel after passing through the sound-absorbing cotton and are absorbed again, improving the absorption effect). Some sound waves are further absorbed by the second sound-absorbing panel after passing through the third sound-absorbing panel. Through multiple absorptions, the energy of low-frequency and high-frequency sound waves is absorbed and dissipated layer by layer, effectively avoiding the problem that traditional sound-absorbing panels cannot dissipate and absorb sound waves due to excessive energy during use. This minimizes indoor noise reflection and propagation, achieving a good sound absorption effect and improving the clarity and sound quality of music. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;

[0025] Figure 3 This is a schematic diagram of the structure of this utility model after removing the sound-absorbing cotton;

[0026] Figure 4 This is a cross-sectional view of the first sound-absorbing panel structure of this utility model;

[0027] Figure 5 This is a schematic diagram showing the assembly relationship between the movable rod and the fixed rod of this utility model;

[0028] Figure 6 This is an enlarged schematic diagram of the structure at point A of this utility model;

[0029] Figure 7 This is a schematic diagram showing the state of the abutment ring and the external threaded cylinder after separation.

[0030] In the diagram, 1 is the first sound-absorbing panel; 11 is the sound-absorbing hole.

[0031] 2. Second sound-absorbing panel;

[0032] 3. Perforation;

[0033] 4. Strip-shaped sound-absorbing panel; 41. Flat section;

[0034] 5. Connecting plate; 6. Telescopic assembly; 61. Fixed rod; 611. Stop plate; 62. Movable rod; 621. Sliding cavity; 622. Through hole;

[0035] 7. Positioning component; 71. External threaded cylinder; 72. Rubber ring; 721. Shrinkage groove; 73. Abutment ring; 8. Sound-absorbing cotton; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0036] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0037] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. It should also be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0038] like Figures 1-7As shown in the embodiment of this application, a sound-absorbing ceiling panel is proposed, having a first direction X, a second direction Y, and a third direction Z, including: a first sound-absorbing panel 1, with multiple sound-absorbing holes 11 penetrating along the third direction Z, the multiple sound-absorbing holes 11 being arrayed and distributed on the first sound-absorbing panel 1; a second sound-absorbing panel 2, connected to the first sound-absorbing panel 1, the first sound-absorbing panel 1 and the second sound-absorbing panel 2 being spaced apart along the third direction Z; the second sound-absorbing panel 2 being fixed to the top of the building on the side away from the first sound-absorbing panel 1; a third sound-absorbing panel, fixedly connected to the bottom wall of the second sound-absorbing panel 2, the bottom wall of the third sound-absorbing panel having multiple through holes 3 penetrating along the second direction Y, the multiple through holes 3 being spaced apart along the first direction X; the third sound-absorbing panel and the first sound-absorbing panel 1 being spaced apart along the third direction Z; and sound-absorbing cotton 8, disposed between the third sound-absorbing panel and the first sound-absorbing panel 1, the sound-absorbing cotton 8 abutting against the top wall of the first sound-absorbing panel 1 and the bottom wall of the third sound-absorbing panel on both sides along the third direction Z respectively.

[0039] When a musical performance takes place in the concert hall, the sound waves first reach the first sound-absorbing panel 1, where some of the sound waves are absorbed. The remaining sound waves pass through the sound-absorbing holes 11 to the sound-absorbing cotton 8, where they are absorbed again. The sound waves passing through the sound-absorbing cotton 8 then reach the third sound-absorbing panel, where they are absorbed. Figure 1 As shown, when sound waves act on the perforations 3 at the bottom of the third sound-absorbing panel, some of the sound waves are reflected back to the sound-absorbing cotton 8, thereby improving the absorption effect of the sound waves; some of the sound waves passing through the third sound-absorbing panel are absorbed again by the second sound-absorbing panel 2, thus passing through four layers of sound-absorbing layers, so that the low-frequency and high-frequency sound wave energy is absorbed and dissipated layer by layer (thereby shortening the reverberation time in the concert hall), effectively avoiding the problem that traditional sound-absorbing layers cannot dissipate and absorb sound wave energy due to excessive sound wave energy during use, reducing indoor noise reflection and propagation, achieving a good sound absorption effect, and improving the clarity and sound quality of the music.

[0040] In some embodiments of this application, the perforation 3 is arranged in a triangular shape. When the sound wave is transmitted to the wall of the perforation 3, the sound wave is reflected to the sound-absorbing cotton 8 under the action of the inclined wall of the perforation 3, thereby absorbing the sound wave again and improving the absorption effect of the sound wave.

[0041] In some embodiments of this application, such as Figure 2 , Figure 3 As shown, the third sound-absorbing panel includes multiple strip-shaped sound-absorbing panels 4 extending along the second direction Y, and the multiple strip-shaped sound-absorbing panels 4 are inclined along the first direction X, such as... Figure 1 As shown, the strip-shaped sound-absorbing panel 4 has a flat part 41 at the end facing the second sound-absorbing panel 2, and the flat parts 41 of multiple strip-shaped sound-absorbing panels 4 are all connected to the bottom wall of the second sound-absorbing panel 2 (they can be connected by adhesive); multiple strip-shaped sound-absorbing panels 4 are sequentially attached and connected along the first direction X (also connected by adhesive), and the ends of adjacent strip-shaped sound-absorbing panels 4 away from the second sound-absorbing panel 2 form a perforation 3.

[0042] In some embodiments of this application, such as Figure 1 , Figure 2 , Figure 3 As shown, the sound-absorbing ceiling panel also includes two connecting plates 5 spaced apart along the first direction X. The first sound-absorbing plate 1, the second sound-absorbing plate 2, the third sound-absorbing plate, and the sound-absorbing cotton 8 are sandwiched between the two connecting plates 5. The first sound-absorbing plate 1, the second sound-absorbing plate 2, and the third sound-absorbing plate are respectively attached to the two connecting plates 5 along the two sides of the first direction X (by adhesive bonding), thereby achieving the effect of connecting the first sound-absorbing plate 1 and the second sound-absorbing plate 2 together through the connecting plates 5. The sound-absorbing cotton 8 is directly filled in the space area enclosed by the third sound-absorbing plate, the second sound-absorbing plate 2, and the two connecting plates 5, and the installation of the sound-absorbing cotton 8 can be achieved without taking any fixing measures.

[0043] In some embodiments of this application, such as Figure 1 As shown, the sound-absorbing ceiling panel in this solution also includes a telescopic component 6 connected to the side of the second sound-absorbing panel 2 facing away from the first sound-absorbing panel 1. The other end of the telescopic component 6 is connected to the top of the building. The telescopic component 6 can adjust the height of the sound-absorbing ceiling panel, thereby positioning it at the required height according to usage needs (ensuring optimal sound absorption and acoustic performance for different types of music performances). Simultaneously, the telescopic component 6 provides greater flexibility during installation, facilitating installation and adjustment of the sound-absorbing ceiling panel.

[0044] In some embodiments of this application, such as Figure 5 As shown, the telescopic component 6 includes a fixed rod 61 connected to the top of the building and a movable rod 62 connected to the second sound-absorbing panel 2. The movable rod 62 is sleeved on the outer periphery of the fixed rod 61 and can move axially along the fixed rod 61. A positioning component 7 is provided on the movable rod 62 to restrict the axial movement of the movable rod 62 relative to the fixed rod 61. During installation, debugging, or daily music performances, it is necessary to adjust the height of the sound-absorbing ceiling panel. First, the restriction of the positioning component 7 on the movable rod 62 is released, allowing the movable rod 62 to move axially relative to the fixed rod 61 to adjust the height of the sound-absorbing ceiling panel. Once the desired height is reached, the positioning component 7 positions and locks the movable rod 62 to fix the sound-absorbing ceiling panel at the current height.

[0045] In some embodiments of this application, such as Figure 5 , Figure 6As shown, a sliding cavity 621 is provided along the axial direction of the movable rod 62. The inner diameter of the sliding cavity 621 is larger than the outer diameter of the fixed rod 61. A through hole 622 is provided at the top of the sliding cavity 621, through which the fixed rod 61 passes upward. A stop plate 611 is provided coaxially at the bottom of the fixed rod 61, which is in close contact with the wall of the sliding cavity 621. The diameter of the through hole 622 is between the inner diameter of the sliding cavity 621 and the outer diameter of the fixed rod 61. The stop plate 611 allows the movable rod 62 to move axially relative to the fixed rod 61. At the same time, the stop plate 611 can also effectively prevent the movable rod 62 from detaching from the fixed rod 61. The stop plate 611 is used to limit the maximum distance that the movable rod 62 can move relative to the fixed rod 61.

[0046] In some embodiments of this application, such as Figure 6 , Figure 7 As shown, the positioning assembly 7 includes an externally threaded cylinder 71 coaxially mounted on the upper end of the movable rod 62, with the externally threaded cylinder 71 spaced apart from the fixed rod 61. A rubber ring 72 is coaxially connected to the upper end of the externally threaded cylinder 71. The rubber ring 72 has a large-diameter end away from the externally threaded cylinder 71 and a small-diameter end connected to the externally threaded cylinder 71. An abutment ring 73 is threadedly fitted onto the externally threaded cylinder 71 (the bottom of the abutment ring 73 is integrally connected to an internally threaded component that threadedly mates with the externally threaded cylinder 71). The inner diameter of the abutment ring 73 is larger than the diameter of the small-diameter end and smaller than the diameter of the large-diameter end. When it is necessary to position and lock the movable rod 62, the internal thread connected to the abutment ring 73 is rotated. The abutment ring 73 moves upward toward the larger diameter end, causing the inner wall of the abutment ring 73 to press against the outer wall of the rubber ring 72, resulting in radial contraction of the rubber ring 72. This causes the inner side of the rubber ring 72 to abut against the outer peripheral wall of the fixing rod 61. The friction between the rubber ring 72 and the outer peripheral wall of the fixing rod 61 positions and locks the movable rod 62. In this design, the greater the upward movement of the abutment ring 73, the greater the radial contraction of the rubber ring 72, and thus the greater the radial pressure exerted by the rubber ring 72 on the outer peripheral wall of the fixing rod 61, resulting in better positioning and locking of the movable rod 62. When height adjustment is needed, rotating the abutment ring 73 in the opposite direction releases the positioning and locking of the movable rod 62.

[0047] In some embodiments of this application, such as Figure 7 As shown, multiple shrinkage grooves 721 are provided at intervals along the circumference of the rubber ring 72. The shrinkage grooves 721 are arranged radially through the rubber ring 72 and extend upward through the large diameter end. The arrangement of the shrinkage grooves 721 provides a certain space margin for the radial shrinkage of the rubber ring 72 when the outer side of the rubber ring 72 is subjected to radial compression by the abutment ring 73. This helps the rubber ring 72 to shrink better toward the outer peripheral wall of the fixing rod 61 and abut against the outer peripheral wall of the fixing rod 61.

[0048] In some embodiments of this application, the first sound-absorbing plate 1, the second sound-absorbing plate 2, and the third sound-absorbing plate are all gypsum board components.

[0049] In summary, this utility model embodiment provides a sound-absorbing ceiling panel. This solution features a multi-hole array of sound-absorbing holes 11 on the first sound-absorbing panel 1, used to concentrate sound waves, which is beneficial for absorbing low-frequency noise and high-frequency interference. After the sound waves pass through the sound-absorbing holes 11 and are absorbed by the sound-absorbing cotton 8, they pass through the third sound-absorbing panel, which continues to absorb low-frequency and high-frequency sound waves (after passing through the sound-absorbing cotton 8, the sound waves are reflected at the perforations 3 on the bottom wall of the third sound-absorbing panel and absorbed again, improving the absorption effect). Some sound waves pass through the third sound-absorbing panel and are further absorbed by the second sound-absorbing panel 2. Through multiple absorptions, the energy of low-frequency and high-frequency sound waves is absorbed and dissipated layer by layer, effectively avoiding the problem of traditional sound-absorbing panels being unable to dissipate and absorb excessive sound wave energy during use, reducing indoor noise reflection and propagation, and achieving a good sound absorption effect.

[0050] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A sound-absorbing ceiling panel, having a first direction (X), a second direction (Y), and a third direction (Z), characterized in that, include: The first sound-absorbing panel (1) has a sound-absorbing hole (11) through it along the third direction (Z). There are multiple sound-absorbing holes (11), and the multiple sound-absorbing holes (11) are arrayed on the first sound-absorbing panel (1). The second sound-absorbing panel (2) is connected to the first sound-absorbing panel (1), and the first sound-absorbing panel (1) and the second sound-absorbing panel (2) are spaced apart along the third direction (Z); the second sound-absorbing panel (2) is fixed to the top of the building on the side away from the first sound-absorbing panel (1); The third sound-absorbing panel is fixedly connected to the bottom wall of the second sound-absorbing panel (2). The bottom wall of the third sound-absorbing panel is provided with a plurality of through holes (3) along the second direction (Y). The plurality of through holes (3) are spaced apart along the first direction (X). The third sound-absorbing panel and the first sound-absorbing panel (1) are spaced apart along the third direction (Z). as well as The sound-absorbing cotton (8) is disposed between the third sound-absorbing plate and the first sound-absorbing plate (1). The sound-absorbing cotton (8) abuts against the top wall of the first sound-absorbing plate (1) and the bottom wall of the third sound-absorbing plate along the two sides of the third direction (Z).

2. The sound-absorbing ceiling panel according to claim 1, characterized in that, The perforation (3) is arranged in a triangular shape.

3. The sound-absorbing ceiling panel according to claim 2, characterized in that, The third sound-absorbing panel includes a plurality of strip-shaped sound-absorbing panels (4) extending along the second direction (Y). The plurality of strip-shaped sound-absorbing panels (4) are inclined along the first direction (X). The strip-shaped sound-absorbing panels (4) have a flat portion (41) at one end facing the second sound-absorbing panel (2). The flat portion (41) of the plurality of strip-shaped sound-absorbing panels (4) is connected to the bottom wall of the second sound-absorbing panel (2). Multiple strip-shaped sound-absorbing panels (4) are sequentially attached and connected along the first direction (X), and the ends of two adjacent strip-shaped sound-absorbing panels (4) away from the second sound-absorbing panel (2) form the perforation (3).

4. The sound-absorbing ceiling panel according to claim 1, characterized in that, The sound-absorbing ceiling panel also includes two connecting plates (5) spaced apart along the first direction (X). The first sound-absorbing plate (1), the second sound-absorbing plate (2), the third sound-absorbing plate, and the sound-absorbing cotton (8) are sandwiched between the two connecting plates (5). The first sound-absorbing plate (1), the second sound-absorbing plate (2), and the third sound-absorbing plate are respectively attached to the two connecting plates (5) along the two sides of the first direction (X).

5. The sound-absorbing ceiling panel according to any one of claims 1-4, characterized in that, The sound-absorbing ceiling panel also includes a telescopic component (6) connected to the second sound-absorbing panel (2) on the side opposite to the first sound-absorbing panel (1), and the other end of the telescopic component (6) is connected to the top of the building.

6. The sound-absorbing ceiling panel according to claim 5, characterized in that, The telescopic assembly (6) includes a fixed rod (61) connected to the top of the building and a movable rod (62) connected to the second sound-absorbing panel (2). The movable rod (62) is sleeved on the outer periphery of the fixed rod (61) and can move axially along the fixed rod (61). The movable rod (62) is provided with a positioning component (7), which is used to restrict the axial movement of the movable rod (62) relative to the fixed rod (61).

7. The sound-absorbing ceiling panel according to claim 6, characterized in that, A sliding cavity (621) is provided along the axial direction of the movable rod (62). The inner diameter of the sliding cavity (621) is larger than the outer diameter of the fixed rod (61). The top of the sliding cavity (621) is provided with a through hole (622) through which the fixed rod (61) passes upward. The bottom of the fixed rod (61) is coaxially provided with a stop plate (611) that fits and contacts the wall of the sliding cavity (621). The diameter of the through hole (622) is between the inner diameter of the sliding cavity (621) and the outer diameter of the fixing rod (61).

8. The sound-absorbing ceiling panel according to claim 7, characterized in that, The positioning component (7) includes an external threaded cylinder (71) coaxially mounted on the upper end of the movable rod (62), and the external threaded cylinder (71) is spaced apart from the fixed rod (61); The upper end of the external threaded cylinder (71) is coaxially connected to a rubber ring (72). The rubber ring (72) has a large diameter end away from the external threaded cylinder (71) and a small diameter end connected to the external threaded cylinder (71). The external threaded cylinder (71) is threaded with an abutment ring (73). Rotate the abutment ring (73), and the abutment ring (73) moves toward the large diameter end. The abutment ring (73) radially presses the outer side wall of the rubber ring (72), causing the rubber ring (72) to radially contract.

9. The sound-absorbing ceiling panel according to claim 8, characterized in that, Multiple shrinkage grooves (721) are provided at intervals along the circumference of the rubber ring (72), the shrinkage grooves (721) are arranged radially through the rubber ring (72), and the shrinkage grooves (721) extend upward through the large diameter end.

10. The sound-absorbing ceiling panel according to claim 1, characterized in that, The first sound-absorbing panel (1), the second sound-absorbing panel (2), and the third sound-absorbing panel are all gypsum board components.

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