Decorative sound-absorbing wall surface

Abstract

The invention relates to the technical field of building decoration construction, and discloses a decorative sound-absorbing wall which comprises a sound-absorbing wall body, the sound-absorbing wall body comprises a wall body unit, an adjusting unit is arranged on the surface of the wall body unit, and a secondary sound-absorbing unit is arranged on the inner wall of the wall body unit. According to the decorative sound-absorbing wall surface, the adjustable air cavity is driven by the lead screw to be linked with the base layer plate, a Helmholtz resonance system is constructed, the thickness of the air cavity is adjusted within the range of 10-80 mm, the frequency coverage is 100-400 Hz, the lead screw is clamped and fixed by the spring, and the sound absorption efficiency is improved at the low-frequency band of 100-500 Hz; a sliding rail-lead screw structure enables the base layer plate to slide, adapts to new and old wall surfaces, is manually adjusted to adapt to scenes such as office areas and music halls, and is suitable for scene expansion; according to the spring clamping type secondary sound absorption unit, 500-5000Hz sound waves are processed through glass wool, 100-5000Hz full-band coverage is formed through low-frequency resonance, rapid glass wool replacement is supported, the maintenance cost is reduced, the medium-high frequency absorption efficiency is improved, and noise reduction and convenient maintenance are combined.

Description

Technical Field

[0001] This invention relates to the field of building decoration construction technology, specifically a decorative sound-absorbing wall surface. Background Technology

[0002] The demand for sound-absorbing materials in the field of architectural acoustics is growing, especially in public buildings, where noise control requirements must be met while also conforming to decorative aesthetic standards. Traditional sound-absorbing materials such as mineral wool boards and perforated gypsum boards have basic sound-absorbing functions, but they suffer from poor decorative properties, easy dust accumulation, and insufficient fire resistance. In recent years, composite sound-absorbing decorative materials have gradually become a research hotspot, and products such as wooden sound-absorbing panels and fabric soft panels have emerged in the market. However, their structural complexity and cost have limited their widespread application.

[0003] Existing decorative sound-absorbing wall panels mostly use fixed-structure sound-absorbing layers. For example, low-frequency sound-absorbing structures based on the Helmholtz resonance principle typically use a fixed air layer thickness, which cannot be dynamically adjusted according to the low-frequency noise in the actual environment, such as air conditioning vibration, traffic noise, stage resonance, etc. within the 100-500Hz range of building decoration construction. This results in poor noise reduction effect in specific frequency bands. Mid- and high-frequency sound-absorbing materials (such as glass wool and polyester fiberboard) are often rigidly connected to the wall base. After long-term use, when the sound absorption efficiency decreases due to material aging, oxidation, and moisture, the entire wall needs to be removed and replaced. This is costly, time-consuming, and labor-intensive. In addition, traditional wall structures have high requirements for wall flatness, making it difficult to adapt to the uneven walls of old buildings. They also lack installation flexibility and have limited integration of decorative and acoustic functions, failing to meet the dual needs of modern buildings for personalized noise reduction and aesthetic design. Therefore, there is an urgent need for a decorative sound-absorbing wall panel. Summary of the Invention

[0004] The purpose of this invention is to provide a decorative sound-absorbing wall surface to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a decorative sound-absorbing wall surface, comprising a sound-absorbing wall body, wherein the sound-absorbing wall body comprises a wall unit, the surface of the wall unit is provided with an adjustment unit, and the inner wall of the wall unit is provided with a secondary sound-absorbing unit; The wall unit is used for the first sound absorption of noise. The wall unit includes a wall, a slide rail is fixedly connected to the inner wall of the wall, a base plate is slidably connected to the surface of the slide rail, an air cavity is opened inside the wall, a rotating seat is fixedly connected to the inner wall of the wall, and a fixing plate is fixedly connected to the surface of the wall.

[0006] The adjustment unit is used to adjust the volume of the air cavity. The adjustment unit includes a mounting plate, an adjustment seat is fixedly connected to the surface of the mounting plate, a bearing is fixedly connected to the inner wall of the adjustment seat, a slot is formed on the surface of the adjustment seat, a lead screw is fixedly connected to the inner wall of the bearing, an adjustment block is fixedly connected to the end of the lead screw near the bearing, a limit block is slidably connected to the surface of the adjustment block, a groove is formed on the surface of the limit block, a spring is fixedly connected to the inner wall of the groove, and a locking block is fixedly connected to the end of the spring away from the groove.

[0007] The surface of the lead screw is threaded to the inner wall of the base plate, and the end of the lead screw away from the mounting plate is rotatably connected to the inner wall of the rotating seat.

[0008] The surface of the mounting plate is fixedly connected to the fixing plate, and the surface of the first card block is slidably connected to the inner wall of the first card slot.

[0009] The secondary sound absorption unit is used for secondary sound absorption and can be quickly replaced. The secondary sound absorption unit includes a sound-absorbing shell, the inner wall of which is slidably connected with glass wool, the surface of which has receiving holes and handrails. The secondary sound absorption unit also includes a limiting frame, the surface of which has a second slot, the inner wall of which is fixedly connected with a second spring, and the end of the second spring away from the limiting frame is fixedly connected with a second locking block. The inner wall of the second locking block is rotatably connected to a second limiting block.

[0010] The surface of the sound-absorbing shell is slidably connected to the inner wall of the wall, and the surface of the limiting frame is fixedly connected to the inner wall of the wall.

[0011] The surface of the second card block is slidably connected to the inner wall of the limiting frame, and the surface of the second limiting block is slidably connected to the inner wall of the second card slot.

[0012] The limiting frame is provided in two sets, and the two sets of limiting frames are arranged linearly along the inner wall of the wall.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are: First, this invention constructs an improved Helmholtz resonance system through a screw-driven adjustable air cavity and a linkage structure with the base plate. Rotating the adjustment block can drive the screw to rotate, thereby driving the base plate to translate along the slide rail, so that the thickness of the air cavity can be precisely adjusted within the range of 10-80mm, corresponding to a Helmholtz resonance frequency coverage of 100-400Hz. It can specifically absorb low-frequency noise in different scenarios. The spring-locking structure of the limiting block and the slot ensures that the screw does not loosen after adjustment, so that the air cavity and the wooden perforated board of the wall unit form a stable resonance system. The sound absorption coefficient in the low-frequency range of 100-500Hz is improved compared with the traditional fixed spacing structure, solving the problems of insufficient flexibility and efficiency bottleneck in low-frequency noise reduction in the existing technology.

[0014] Secondly, the sliding rail-screw driven base plate translation structure designed in this invention endows the wall with "scenario-based noise reduction" capability. The base plate can slide along the inner wall of the wall, which can not only adapt to the flat wall surface of new buildings, but also compensate for the unevenness of the wall surface of old buildings through dynamic adjustment. The maximum adaptation error is ±10mm, which improves the installation efficiency. For the noise reduction needs of different places such as office areas and concert halls, the air cavity volume can be adjusted manually or automatically. For example, in the office area, the adjustment to a 20mm gap enhances the absorption of 300Hz human voices, and in the concert hall, the adjustment to a 50mm gap reduces 150Hz low-frequency standing waves. This realizes the leap from "single fixed noise reduction" to "dynamic adaptation on demand". The applicable scenarios have been expanded from 3 types to more than 5 types, which significantly improves the applicability of the wall in different environments.

[0015] Third, this invention constructs a "graded noise reduction + convenient maintenance" system through a spring-loaded secondary sound-absorbing unit. The glass wool in the secondary sound-absorbing unit absorbs the mid-to-high frequency sound waves (500-5000Hz) that penetrate the air cavity, resonating with the low frequency of the air cavity to form a full-frequency coverage of 100-5000Hz with an overall sound absorption coefficient ≥0.8. This solves the noise reduction blind spot in the high-frequency band of traditional single structures. The two-block-two-spring structure of the limiting frame and the sound-absorbing shell allows for quick, tool-free replacement of aged glass wool with one hand, avoiding the drawbacks of traditional solutions that require dismantling the entire wall, thus reducing maintenance costs. Furthermore, the receiving hole diameter of the sound-absorbing shell and the perforated plate of the air cavity form graded sound wave filtration, improving the mid-to-high frequency absorption efficiency, achieving a dual optimization of noise reduction performance and maintenance convenience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the overall structure of the present invention broken down; Figure 3 This is a partial structural diagram of the present invention; Figure 4 This is a partial structural diagram of the present invention; Figure 5 This is a schematic diagram of the internal structure of a portion of the present invention; Figure 6 This is a partial structural breakdown diagram of the present invention.

[0017] Legend: 1. Sound-absorbing walls; 10. Wall unit; 1001. Wall; 1002. Base plate; 1003. Air cavity; 1004. Rotating seat; 1005. Slide rail; 1006. Fixing plate; 20. Adjustment unit; 2001. Mounting plate; 2002. Adjustment seat; 2003. Slot 1; 2004. Bearing; 2005. Lead screw; 2006. Adjustment block; 2007. Limit block 1; 2008. Slide groove; 2009. Spring 1; 2010. Locking block 1; 30. Secondary sound absorption unit; 3001. Sound absorption shell; 3002. Glass wool; 3003. Receiving hole; 3004. Handrail; 3005. Limiting frame; 3006. Card slot two; 3007. Spring two; 3008. Card block two; 3009. Limiting block two. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the present invention provides a technical solution: a decorative sound-absorbing wall surface, including a sound-absorbing wall body 1, the sound-absorbing wall body 1 including a wall unit 10, an adjustment unit 20 is provided on the surface of the wall unit 10, and a secondary sound-absorbing unit 30 is provided on the inner wall of the wall unit 10. The wall unit 10 is used for the first sound absorption of noise. The wall unit 10 includes a wall 1001, a slide rail 1005 is fixedly connected to the inner wall of the wall 1001, a base plate 1002 is slidably connected to the surface of the slide rail 1005, an air cavity 1003 is opened inside the wall 1001, a rotating seat 1004 is fixedly connected to the inner wall of the wall 1001, and a fixing plate 1006 is fixedly connected to the surface of the wall 1001.

[0020] As the core structure for achieving the first sound absorption, the wall unit 10's main wall 1001 not only provides a supporting frame for the entire unit but also constructs a basic system for low-frequency noise reduction through its internal structure. The slide rail 1005 fixed to the inner wall provides a guide track for the base plate 1002 to slide vertically along the wall surface, allowing the base plate 1002 to move smoothly across the surface of the slide rail 1005. This alters the thickness of the air cavity 1003 between the base plate and the wall 1001. The air cavity 1003 is the key cavity in the improved Helmholtz resonator structure, used to... The air column resonates and absorbs low-frequency noise of 100-500Hz; the rotating seat 1004 fixed on the inner wall provides a rotation support point for the adjustment unit such as the lead screw 2005, ensuring the stable installation of the adjustment mechanism that drives the sliding of the base plate 1002 and achieving precise control of the volume of the air cavity 1003; the fixing plate 1006 fixed on the surface of the wall 1001 undertakes the function of modular splicing, which can fix multiple wall units 10 in the horizontal or vertical direction to form a continuous decorative sound-absorbing wall surface. The surface of the base plate 1002 has perforations, which also provide adjustment... The mounting plate 2001 and other components in section unit 20 provide an installation reference, enabling the entire wall unit 10 to dynamically adjust the air cavity volume during the initial sound absorption process, primarily targeting low-frequency noise. This also supports large-scale, modular engineering applications, effectively improving the wall's noise reduction adaptability and installation convenience in different scenarios. Adjustment unit 20 is used to adjust the volume of air cavity 1003. Adjustment unit 20 includes mounting plate 2001, with adjustment seat 2002 fixedly connected to the surface of mounting plate 2001. The inner wall of adjustment seat 2002... A bearing 2004 is fixedly connected. A groove 2003 is formed on the surface of the adjusting seat 2002. A lead screw 2005 is fixedly connected to the inner wall of the bearing 2004. An adjusting block 2006 is fixedly connected to the end of the lead screw 2005 near the bearing 2004. A limit block 2007 is slidably connected to the surface of the adjusting block 2006. A sliding groove 2008 is formed on the surface of the limit block 2007. A spring 2009 is fixedly connected to the inner wall of the sliding groove 2008. A locking block 2010 is fixedly connected to the end of the spring 2009 away from the sliding groove 2008.

[0021] The adjustment unit 20, as the core component for dynamically adjusting the volume of the air cavity 1003, has its mounting plate 2001 fixedly connected to the fixing plate 1006 of the wall unit 10, providing a stable installation reference for the entire adjustment mechanism. The adjustment seat 2002 is fixed to the surface of the mounting plate 2001, and the bearing 2004 on its inner wall provides low-friction rotational support for the lead screw 2005, allowing the lead screw 2005 to rotate flexibly around the central axis of the bearing 2004. The groove 2003 on the surface of the adjustment seat 2002... This forms a positioning fit structure with the locking block 2010 of the limiting block 2007; one end of the lead screw 2005 is connected to the adjusting seat 2002 through the bearing 2004, and the other end is rotatably connected to the rotating seat 1004 of the wall unit 10. Its outer wall thread fits with the threaded hole on the inner wall of the base plate 1002. When the user rotates the adjusting block 2006, which is fixed to the end of the lead screw 2005 near the bearing 2004, the rotational motion of the lead screw 2005 is converted into the linear translational motion of the base plate 1002 along the slide rail 1005, thereby... The thickness of the air cavity 1003 is precisely adjusted. A limiting block 2007 is slidably fitted onto the surface of the adjusting block 2006. A spring 2009 within its internal groove 2008 continuously drives the locking block 2010 to move towards the adjusting seat 2002. When the adjusting block 2006 rotates to the target position, the locking block 2010, under the elastic force of the spring 2009, engages with the corresponding groove in the locking slot 2003, forming a mechanical lock. This prevents the lead screw 2005 from rotating due to external vibrations, ensuring the volume of the air cavity 1003 is maintained. After adjustment, the entire adjustment unit 20 achieves precise control and reliable fixation of the air cavity 1003 volume through a linkage mechanism of "screw drive - slot positioning - spring locking," providing key technical support for the dynamic adaptation and absorption of low-frequency noise. This device incorporates a modified Helmholtz resonator. A classic Helmholtz resonator consists of a neck tube and a cavity. When the frequency of the external sound wave matches the resonator's natural frequency, the air column in the neck resonates, and the air inside the cavity is compressed / expanded, dissipating sound energy through friction. Its natural frequency formula is... c is the speed of sound, approximately 340 m / s, A is the area of ​​the neck opening, V is the volume of the cavity, and L is the equivalent length of the neck including end correction. The frequency of the air column can be adjusted by adjusting the volume of the air cavity 1003. When low-frequency sound waves, such as 100-500 Hz, are incident, the air column at the perforation vibrates with the sound waves, driving the air in the air layer to reciprocate and form resonance. At this time, the sound wave energy is converted into frictional heat energy between the air and the edge of the perforation, and between the air layer and the base plate, achieving the first energy attenuation.

[0022] The surface of the lead screw 2005 is threadedly connected to the inner wall of the base plate 1002, and the end of the lead screw 2005 away from the mounting plate 2001 is rotatably connected to the inner wall of the rotating seat 1004.

[0023] The external thread on the surface of the lead screw 2005 and the internal thread on the inner wall of the base plate 1002 form a threaded transmission pair. This connection method is the core transmission structure that enables the adjustment unit 20 to convert rotational motion into linear motion. When the adjustment block 2006 drives the lead screw 2005 to rotate around the axis of the bearing 2004, the base plate 1002 cannot rotate due to its sliding connection with the slide rail 1005. Thus, under the action of thread meshing, it makes a precise linear translational movement along the direction of the slide rail 1005, thereby changing the thickness of the air cavity 1003 between it and the wall 1001. The end of the lead screw 2005 away from the mounting plate 2001 is rotatably connected to the bearing or bushing on the inner wall of the rotating seat 1004. The rotating seat 1004, as a support structure fixed to the inner wall of the wall 1001, provides a remote rotation fulcrum for the lead screw 2005, effectively reducing the cantilever deformation and vibration of the lead screw during long-distance transmission, ensuring its rotational smoothness and transmission accuracy, and making the translational movement of the base plate 1002 smoother and more accurate in positioning. This "two-end support + threaded transmission" structural design not only ensures the mechanical stability of the adjustment unit 20 in adjusting the volume of the air cavity 1003, but also achieves fine adjustment of the air cavity thickness through precise pitch control, providing a reliable hardware foundation for the dynamic adaptation of the Helmholtz resonator improved structure to different low-frequency noise frequencies.

[0024] The surface of the mounting plate 2001 is fixedly connected to the fixing plate 1006, and the surface of the card block 2010 is slidably connected to the inner wall of the card slot 2003.

[0025] The surface of the mounting plate 2001 is fixedly connected to the fixing plate 1006 of the wall unit 10 through bolts, welding, or other means to achieve a rigid connection, providing a stable installation foundation for the adjustment unit 20. This ensures that the relative positions of components such as the adjustment seat 2002, bearing 2004, and lead screw 2005 remain unchanged, guaranteeing stable and reliable force transmission during adjustment and preventing volume adjustment deviations in the air cavity 1003 due to loose installation. The surface of the locking block 2010 is slidably connected to the inner wall of the slot 2003 on the surface of the adjustment seat 2002. Under the elastic force of the spring 2009, the locking block 2010 can slide or engage along the circumferential groove of the slot 2003. When the adjustment block 2006 moves... When the lead screw 2005 rotates to the target position, the locking block 2010 engages with the corresponding groove of the locking slot 2003, forming a mechanical limit and preventing the adjusting block 2006 from rotating arbitrarily. This locks the position of the lead screw 2005, ensuring the fixed spacing of the base plate 1002 on the slide rail 1005 and maintaining the stability of the volume of the air cavity 1003. This connection structure allows the adjusting block 2006 to rotate flexibly in the unlocked state to adjust the thickness of the air cavity, and can also prevent accidental displacement by locking after adjustment. This ensures the stable and reliable low-frequency noise reduction effect of the improved Helmholtz resonator structure and realizes the functional switching and coordinated cooperation between the adjusting unit 20 and "dynamic adjustment" and "fixed locking".

[0026] The secondary sound absorption unit 30 is used for secondary sound absorption and can be quickly replaced. The secondary sound absorption unit 30 includes a sound-absorbing shell 3001, glass wool 3002 is slidably connected to the inner wall of the sound-absorbing shell 3001, a receiving hole 3003 is opened on the surface of the sound-absorbing shell 3001, a handrail 3004 is opened on the surface of the sound-absorbing shell 3001, the secondary sound absorption unit 30 also includes a limiting frame 3005, a second slot 3006 is opened on the surface of the limiting frame 3005, a second spring 3007 is fixedly connected to the inner wall of the limiting frame 3005, a second locking block 3008 is fixedly connected to the end of the second spring 3007 away from the limiting frame 3005, and a second limiting block 3009 is rotatably connected to the inner wall of the second locking block 3008.

[0027] The secondary sound absorption unit 30, as the core component for secondary absorption of mid-to-high frequency noise and convenient maintenance, has a sound-absorbing shell 3001 that guides mid-to-high frequency sound waves (500-5000Hz) penetrating the air cavity 1003 into the interior through receiving holes 3003 (10-15mm in diameter) on its surface. The glass wool 3002, slidably connected to the inner wall, dissipates and absorbs the sound waves through its porous structure, supplementing the low-frequency noise reduction of the air cavity and achieving full-frequency coverage of 100-5000Hz. The handle 3004 on the surface of the sound-absorbing shell 3001 provides a point of leverage for the user. Combined with the limit bracket 3005 (fixed to the inner wall of the wall 1001) and its slot 3006, spring 3007, and locking block 3008, a quick-replacement structure is formed. When the aging glass wool 3002 needs to be replaced, pulling the handle 3006 allows for easy replacement. 4. Move the sound-absorbing shell 3001 outward. The second locking block 3008 slides on the inner wall of the limiting frame 3005 and compresses the second spring 3007 until the second limiting block 3009 disengages from the second slot 3006. Then, the sound-absorbing shell 3001 can be pulled out along the inner wall slide rail of the wall. After replacement, reverse the operation. The second locking block 3008 is locked into the second slot 3006 under the elastic force of the second spring 3007. The second limiting block 3009 rotates and locks, realizing tool-free quick replacement within 10 seconds. This structure not only fills the high-frequency noise reduction blind zone through the secondary sound absorption of glass wool 3002, but also solves the problem of complicated replacement after the aging of traditional sound-absorbing materials through the design of "spring locking-slide rail guidance-handrail linkage". This improves maintenance efficiency and does not affect the structural stability of the wall unit 10, effectively ensuring the reliability of the long-term noise reduction performance of the wall.

[0028] The surface of the sound-absorbing housing 3001 is slidably connected to the inner wall of the wall 1001, and the surface of the limiting frame 3005 is fixedly connected to the inner wall of the wall 1001.

[0029] The surface of the sound-absorbing housing 3001 is slidably connected to the inner wall of the wall 1001 through a sliding rail, groove, or other structure. This connection provides a guide rail for the sound-absorbing housing 3001 to move back and forth along the inner wall of the wall 1001, allowing the user to easily pull out or push the sound-absorbing housing 3001 in a straight line using the handle 3004 when replacing the internal glass wool 3002, ensuring a smooth and uninterrupted replacement process and providing a physical basis for the rapid replacement of the secondary sound-absorbing unit 30. The surface of the limiting bracket 3005 is fixedly connected to the inner wall of the wall 1001 through bolts, adhesives, or other means, serving as a fixed support structure for the secondary sound-absorbing unit 30. The slot 3006 on its surface provides a positioning groove for the locking block 3008, and the inner wall is fixed with a spring. Spring 3007 engages with the limiting structure of the sound-absorbing shell 3001 via elastic drive block 3008, thereby locking the sound-absorbing shell 3001. This combination design of "sliding connection providing movement guidance + fixed connection providing positioning support" ensures that the sound-absorbing shell 3001 is stably fixed to the inner wall of the wall 1001 during operation by the engagement of block 3008 and slot 3006, preventing displacement caused by sound wave vibration. It also allows the sound-absorbing shell 3001 to be quickly disengaged from the limiting frame 3005 along the sliding connection structure by pulling the handle 3004 when maintenance is required, enabling tool-free replacement of glass wool 3002 within 10 seconds. This significantly improves the ease of maintenance of the wall system while ensuring the stability of the secondary sound absorption function.

[0030] The surface of the second card block 3008 is slidably connected to the inner wall of the limit frame 3005, and the surface of the second limit block 3009 is slidably connected to the inner wall of the second card slot 3006.

[0031] The surface of the second locking block 3008 is slidably connected to the inner wall of the limiting frame 3005, allowing it to reciprocate along a preset track inside the limiting frame 3005. Under the elastic force of the second spring 3007, the end of the second locking block 3008 always extends towards the sound-absorbing housing 3001. When the sound-absorbing housing 3001 is inserted into the inner wall of the wall 1001, the second locking block 3008 aligns and engages with the limiting structure on the sound-absorbing housing 3001, thus fixing the sound-absorbing housing 3001. The surface of the second limiting block 3009 is slidably connected to the inner wall of the second slot 3006 on the surface of the limiting frame 3005. Its rotatable connection with the second locking block 3008 allows the user to pull the second limiting block 3009, causing the second locking block 3008 to retract towards the inside of the limiting frame 3005 against the elastic force of the second spring 3007, thus disengaging the second locking block 3008 from the limiting structure of the sound-absorbing housing 3001. At this time, the sound-absorbing housing 3001 can be pulled out along the sliding connection structure of the inner wall of the wall 1001 to complete the replacement of the glass wool 3002. When the sound-absorbing housing 3001 is reset, the second locking block 3008 automatically pops out and locks into the limiting groove of the sound-absorbing housing 3001 under the action of the second spring 3007. The second limiting block 3009 slides to the locking position of the second locking groove 3006, forming a double fixing mechanism of "spring-driven locking-limiting block sliding locking". This not only ensures the stability of the secondary sound-absorbing unit 30 during operation and prevents the sound-absorbing housing 3001 from loosening due to sound wave vibration, but also realizes one-handed quick unlocking during maintenance. Through the sliding cooperation of the second locking block 3008 and the second limiting block 3009 in the limiting frame 3005, the installation stability and replacement convenience of the secondary sound-absorbing unit 30 are effectively balanced, ensuring that it continues to play a mid-to-high frequency noise reduction role in long-term use.

[0032] Two sets of limit frames 3005 are provided, and the two sets of limit frames 3005 are arranged linearly along the inner wall of the wall 1001.

[0033] Two sets of limiting brackets 3005 are arranged linearly along the inner wall of the wall 1001, such as parallel vertically or symmetrically horizontally. This layout design effectively improves the stability and uniformity of force distribution during the installation of the secondary sound absorption unit 30 by providing symmetrical support and limiting structures at both ends or sides of the sound-absorbing housing 3001. Each set of limiting brackets 3005 is fixed to the inner wall of the wall 1001 and aligned with the corresponding position of the sound-absorbing housing 3001. The second spring 3007 and the second locking block 3008 on the inner wall of each bracket cooperate with the limiting structure of the sound-absorbing housing 3001 from different directions to form a multi-point locking mechanism. For example, the second locking block 3008 of the upper limiting bracket 3005 engages with the slot on the upper edge of the sound-absorbing housing 3001, and the second locking block 3008 of the lower limiting bracket 3005 engages with the slot on the lower edge. This avoids the possibility of tilting or jamming of the housing caused by single-point limiting, ensuring that the sound-absorbing housing 3001 is securely fixed to the wall 1001. 01. The inner wall maintains a horizontal or vertical posture during sliding, improving the smoothness of replacement operations. At the same time, the two linearly arranged sets of limiting frames 3005, through symmetrically distributed slots 3006 and limiting blocks 3009, evenly distribute the sound wave vibration load borne by the sound-absorbing shell 3001 during operation, reducing the stress load on a single limiting frame and extending the service life of springs 3007 and blocks 3008. This structural design not only enhances the installation stability of the secondary sound-absorbing unit 30 through multi-point support, preventing limiting failure caused by long-term vibration, but also ensures the consistency of operation during quick replacement of the sound-absorbing shell 3001 through symmetrical layout, allowing the two side blocks 3008 to unlock or lock synchronously, controlling the replacement time within 10 seconds and avoiding shell deformation. This ensures the continuous and efficient absorption of mid-to-high frequency sound waves by the glass wool 3002, improving the noise reduction reliability and maintenance convenience of the entire wall system.

[0034] Working principle: When noise enters the wall unit 10, the air cavity 1003 between the wall 1001 and the base plate 1002, and the base plate 1002 can be set as a perforated wooden board to form an improved structure of the Helmholtz resonator. The perforations in the base plate 1002 serve as the "neck" of the resonator, and the air cavity 1003 serves as the "cavity," based on the Helmholtz resonance principle. c is the speed of sound, approximately 340 m / s; A is the area of ​​the neck opening; V is the cavity volume; and L is the equivalent length of the neck. When low-frequency sound waves (100-500 Hz) are incident, the air column at the perforation vibrates with the sound waves, driving the air in the air cavity to reciprocate and form resonance. Sound energy is dissipated through friction between the air and the edge of the perforation, and between the air and the base plate, achieving the first absorption of low-frequency noise. The user rotates the adjusting block 2006 of the adjusting unit 20, causing the lead screw 2005 to rotate. The lead screw 2005 drives the base plate 1002 along the slide rail 1 on the inner wall of the wall 1001 via a thread. 005 is shifted to change the thickness adjustment range of air cavity 1003 by 10-80mm, thereby adjusting the air cavity volume V, so that the resonator's natural frequency f covers 100-400Hz, adapting to low-frequency noise in different scenarios such as 250Hz vibration of conference room air conditioners and 180Hz low-frequency resonance in theaters. After adjustment, the locking block 2010 of limit block 2007 is engaged in the slot 2003 of adjustment seat 2002 under the action of spring 2009, locking screw 2005 to maintain the stability of air cavity volume; the middle and high frequencies penetrating air cavity 1003 are adjusted. The 500-5000Hz high-frequency sound waves enter the secondary sound-absorbing unit 30. The receiving holes 3003 on the surface of the sound-absorbing shell 3001 guide the sound waves to the glass wool 3002 on the inner wall. The energy is further dissipated through the viscous resistance of its porous structure and fiber friction, achieving noise reduction across the entire frequency band. When the glass wool 3002 ages, pulling the handle 3004 causes the second limiting block 3009 to rotate, causing the second locking block 3008 to overcome the elastic force of the second spring 3007 and disengage from the second locking slot 3006 of the limiting frame 3005. The sound-absorbing shell 3001 then moves along the inner wall of the wall 1001. Sliding out and reversing operation after replacement enables rapid installation within 10 seconds; the fixing plate 1006 of the wall unit 10 is fixedly connected to the mounting plate 2001 of the adjustment unit 20, providing a reference for the installation of the adjustment mechanism; two sets of linearly arranged limit frames 3005 ensure the stability of the sound-absorbing shell 3001 and smooth replacement through a symmetrical snap-fit ​​structure; the entire system dynamically matches the low-frequency noise frequency with the improved structure of the Helmholtz resonator, combined with mid-to-high frequency secondary absorption and quick replacement design, forming a highly efficient noise reduction system of "principle innovation - structural linkage - convenient maintenance".

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A decorative sound-absorbing wall panel, comprising a sound-absorbing wall body (1), characterized in that: The sound-absorbing wall (1) includes a wall unit (10), the surface of the wall unit (10) is provided with an adjustment unit (20), and the inner wall of the wall unit (10) is provided with a secondary sound-absorbing unit (30). The wall unit (10) is used for the first sound absorption of noise. The wall unit (10) includes a wall (1001), a slide rail (1005) is fixedly connected to the inner wall of the wall (1001), a base plate (1002) is slidably connected to the surface of the slide rail (1005), an air cavity (1003) is opened inside the wall (1001), a rotating seat (1004) is fixedly connected to the inner wall of the wall (1001), and a fixing plate (1006) is fixedly connected to the surface of the wall (1001).

2. The decorative sound-absorbing wall panel according to claim 1, characterized in that: The adjustment unit (20) is used to adjust the volume of the air cavity (1003). The adjustment unit (20) includes a mounting plate (2001), an adjustment seat (2002) is fixedly connected to the surface of the mounting plate (2001), a bearing (2004) is fixedly connected to the inner wall of the adjustment seat (2002), a slot (2003) is opened on the surface of the adjustment seat (2002), and a lead screw (2005) is fixedly connected to the inner wall of the bearing (2004). An adjusting block (2006) is fixedly connected to one end of the lead screw (2005) near the bearing (2004). A limiting block (2007) is slidably connected to the surface of the adjusting block (2006). A groove (2008) is opened on the surface of the limiting block (2007). A spring (2009) is fixedly connected to the inner wall of the groove (2008). A locking block (2010) is fixedly connected to the end of the spring (2009) away from the groove (2008).

3. The decorative sound-absorbing wall panel according to claim 2, characterized in that: The surface of the lead screw (2005) is threaded to the inner wall of the base plate (1002), and the end of the lead screw (2005) away from the mounting plate (2001) is rotatably connected to the inner wall of the rotating seat (1004).

4. A decorative sound-absorbing wall panel according to claim 2, characterized in that: The surface of the mounting plate (2001) is fixedly connected to the fixing plate (1006), and the surface of the first card block (2010) is slidably connected to the inner wall of the first card slot (2003).

5. A decorative sound-absorbing wall panel according to claim 1, characterized in that: The secondary sound absorption unit (30) is used for secondary sound absorption and can be quickly replaced. The secondary sound absorption unit (30) includes a sound-absorbing shell (3001), glass wool (3002) is slidably connected to the inner wall of the sound-absorbing shell (3001), a receiving hole (3003) is opened on the surface of the sound-absorbing shell (3001), a handrail (3004) is opened on the surface of the sound-absorbing shell (3001), and a limiting frame (3005) is also included. The limiting frame (3005) has a slot 2 (3006) opened on the surface of the limiting frame (3005), a spring 2 (3007) is fixedly connected to the inner wall of the limiting frame (3005), a locking block 2 (3008) is fixedly connected to the end of the spring 2 (3007) away from the limiting frame (3005), and a limiting block 2 (3009) is rotatably connected to the inner wall of the locking block 2 (3008).

6. A decorative sound-absorbing wall panel according to claim 5, characterized in that: The surface of the sound-absorbing shell (3001) is slidably connected to the inner wall of the wall (1001), and the surface of the limiting frame (3005) is fixedly connected to the inner wall of the wall (1001).

7. A decorative sound-absorbing wall panel according to claim 5, characterized in that: The surface of the second card block (3008) is slidably connected to the inner wall of the limiting frame (3005), and the surface of the second limiting block (3009) is slidably connected to the inner wall of the second card slot (3006).

8. A decorative sound-absorbing wall panel according to claim 5, characterized in that: The limiting frame (3005) is provided in two sets, and the two sets of the limiting frame (3005) are arranged linearly along the inner wall of the wall (1001).

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