A multifunctional space with sound field switching function

Abstract

The application discloses a multifunctional space with a sound field switching function, a plurality of second sound absorption body structures are arranged on a wall structure, a wall surface base plate is laid in an area of the wall structure which is not covered by the second sound absorption body structures, and an external diffusion movable door is arranged outside each group of the second sound absorption body structures, different door leaves of the external diffusion movable door are moved, the sound field effect of the whole space can be switched, different acoustic scenes required by users can be met, and the flexibility of the decorative wall is improved.

Description

Technical Field

[0001] This invention relates to the field of architectural decoration technology, and in particular to a multifunctional space with sound field switching function. Background Technology

[0002] Traditional soundproof wall panels typically use a structure filled with sound-absorbing cotton, which can only absorb sound waves in a specific frequency range. If the sound absorption effect of the wall panel needs to be adjusted, the density and thickness of the sound-absorbing cotton material itself must be adjusted. Therefore, once the soundproof wall panel is installed, its sound absorption effect cannot be adjusted. The sound field effect of traditional soundproof wall panels is too simplistic and lacks flexibility, making it impossible to effectively adjust to different acoustic environment requirements. Summary of the Invention

[0003] In view of this, the present invention provides a multifunctional space with sound field switching function to solve the problems existing in the background art.

[0004] A multifunctional space with sound field switching function includes a suspended ceiling fixed to the keel at the top of the multifunctional room via a suspension rod assembly, and a decorative wall installed on the side wall of the multifunctional room. The ceiling is provided with a first sound-absorbing structure, and ceiling lights are embedded in the ceiling panels on both sides of the first sound-absorbing structure. Hanging rails are fixed on the ceiling panels on both sides of the ceiling lights. The decorative wall includes a second sound-absorbing structure, a wall base plate, and an external diffusion sliding door. The second sound-absorbing structure is provided in multiple sets. The multiple sets of the second sound-absorbing structure are laid at intervals along the length of the side wall, and the area of ​​the wall not covered by the second sound-absorbing structure is covered with a wall base plate. An external diffusion sliding door is movably provided on the outside of each set of the second sound-absorbing structure. The second sound-absorbing structure includes a superstructure cotton sound absorber, a superstructure low-frequency sound absorber, and a superstructure broadband sound absorber arranged side by side. In the standard sound field mode, the first and second doors of the external diffusion sliding door are located outside the superstructure low-frequency sound absorber and the superstructure broadband sound absorber, respectively, to shield them. In the first sound field mode, the first door of the external diffusion sliding door slides to the outside of the superstructure cotton sound absorber so that the superstructure low-frequency sound absorber is exposed and the superstructure broadband sound absorber is shielded by the second door. In the second sound field mode, the second door of the external diffusion sliding door slides to the outside of the wall base plate so that the superstructure broadband sound absorber is exposed and the superstructure low-frequency sound absorber is shielded by the first door.

[0005] Preferably, a first sound-absorbing structure is provided in part or all of the suspended ceiling area. The first sound-absorbing structure includes irregularly shaped diffusers and super-fine cotton sound absorbers. Multiple irregularly shaped diffusers are arranged in an array to form a diffuser array. Super-fine cotton sound absorbers are arranged on both sides of the diffuser array. Some irregularly shaped diffusers are embedded with lighting lamps.

[0006] Preferably, the metamaterial sound absorber includes a second outer frame and a metamaterial material fixed inside the second outer frame. A second perforated metal plate is provided on one side of the metamaterial material, and a second cavity is formed between the metamaterial material and the second perforated metal plate. The outer surface of the second perforated metal plate is provided with a wood veneer, and a plurality of sound-permeable micropores are provided on the wood veneer.

[0007] Preferably, the inner side of the second perforated metal plate is provided with a plurality of anti-deformation reinforcing ribs from top to bottom.

[0008] Preferably, the tops of both the first and second doors of the externally mounted diffusion sliding door are located within the hanging rail.

[0009] Preferably, the first door leaf includes a door frame, a plurality of anti-deformation ribs disposed within the door frame, and a meta-diffuser disposed on the outer side of the door frame; The second door leaf includes a door frame and multiple anti-deformation ribs installed inside the door frame.

[0010] Preferably, the metamorphic diffuser is a long wooden frame with a continuous opening at the bottom and an internal cavity, and protrusions extend from the inner walls of the front and rear sides of the wooden frame.

[0011] Preferably, the outer surfaces of the superstructure cotton sound absorber, the superstructure low-frequency sound absorber, and the superstructure broadband sound absorber are flush. The superstructure cotton sound absorber is used to absorb mid-to-high frequency sound waves of 500-5000HZ, the superstructure low-frequency sound absorber is used to absorb narrowband low-frequency sound waves of 100-1500HZ, and the superstructure broadband sound absorber is used to absorb full-band sound waves of 100-12000HZ.

[0012] Preferably, the ultrastructure broadband sound absorber includes a first outer frame and a plurality of Helmholtz cavity modules fixed within the first outer frame. The plurality of Helmholtz cavity modules are arranged in a matrix to form a Helmholtz cavity array. A first metal perforated plate is provided on one side of the Helmholtz cavity array. A first cavity is formed between the Helmholtz cavity array and the first metal perforated plate. A decorative fabric is provided on the outer surface of the first metal perforated plate.

[0013] Preferably, the inner side of the first perforated metal plate is provided with a plurality of anti-deformation reinforcing ribs from top to bottom.

[0014] Preferably, the superstructure low-frequency sound absorber includes a modular mounting frame and multiple superstructure low-frequency sound-absorbing modules fixed within the modular mounting frame, with the multiple superstructure low-frequency sound-absorbing modules arranged in a matrix.

[0015] Preferably, the side wall of the multifunctional room without a decorative wall is also equipped with a speaker and / or a projector.

[0016] The beneficial effects of this invention are: 1. This application sets multiple sets of second sound-absorbing structures on the wall structure, lays a wall base board in the area of ​​the wall structure not covered by the second sound-absorbing structures, and sets external diffusion sliding doors on the outside of each set of second sound-absorbing structures. By moving different door panels of the external diffusion sliding doors, the sound field effect of the decorative wall can be switched to meet the user's needs for different acoustic scenarios and improve the flexibility of the decorative wall.

[0017] 2. Each group of second sound-absorbing structures in this application consists of a superstructure cotton sound absorber, a superstructure low-frequency sound absorber, and a superstructure broadband sound absorber arranged side by side. Under different sound field modes, they can absorb sound waves of different frequencies to achieve different sound field effects.

[0018] 3. This application sets multiple meta-diffusers on the surface of the second door leaf of the externally diffused sliding door. The multiple meta-diffusers diffuse and reflect sound, so that the sound can diffuse in a wide angle range of 120°-180°, rather than being reflected in a specific direction. This avoids the sound energy being concentrated in a certain area of ​​the room. At the same time, the structural characteristics of the internal cavity of the meta-diffuser can be used to absorb the sound entering the cavity, so as to achieve integrated control of sound absorption and dispersion.

[0019] 4. This application can switch the sound absorption effect of the entire wall by adjusting the position of different door leaves of the sliding door. The structure is simple, the operation is convenient, the construction cost is greatly reduced, and the sliding door is also easy to maintain. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the second sound-absorbing structure installed on the wall structure.

[0022] Figure 2 This is a schematic diagram of a decorative wall under standard sound field mode.

[0023] Figure 3 This is a schematic diagram of the decorative wall in the first sound field mode.

[0024] Figure 4 This is a schematic diagram of the decorative wall in the second sound field mode.

[0025] Figure 5 This is a top view of the clad wall.

[0026] Figure 6 This is a schematic diagram of the longitudinal section of the superstructure cotton sound absorber.

[0027] Figure 7 This is a front view of the super-structured cotton sound absorber.

[0028] Figure 8 This is a schematic diagram showing the removal of the second perforated metal plate from the super-structured cotton sound absorber.

[0029] Figure 9 This is a schematic diagram of the longitudinal section of a superstructure low-frequency sound absorber.

[0030] Figure 10 This is a front view of a superstructure low-frequency sound absorber.

[0031] Figure 11 This is a longitudinal cross-sectional schematic diagram of a superstructure broadband sound absorber.

[0032] Figure 12 This is a front view of a superstructure broadband sound absorber.

[0033] Figure 13 This is a schematic diagram of the removal of the first perforated metal plate from the ultrastructure broadband sound absorber.

[0034] Figure 14 This is a schematic diagram of the structure of a meta-diffuser.

[0035] Figure 15 This is a schematic diagram of a suspended ceiling.

[0036] The labels in the diagram mean: 1 is the wall baseboard. 2 is an externally mounted, diffused sliding door; 21 is the first door leaf; 22 is the second door leaf; 23 is the door frame; and 24 is the anti-deformation frame. 3 is the super-structured cotton sound absorber, 31 is the second outer frame, 32 is the super-structured cotton material, 33 is the second perforated metal plate, 34 is the wood veneer, 35 is the second cavity, and 36 is the second anti-deformation reinforcing rib. 4 represents a superstructure low-frequency sound absorber, 41 represents a modular mounting frame, and 42 represents a superstructure low-frequency sound-absorbing module. 5 is the ultra-structural broadband sound absorber, 51 is the first outer frame, 52 is the Helmholtz cavity module, 53 is the first perforated metal plate, 54 is the first cavity, 55 is the facing fabric, and 56 is the first anti-deformation reinforcing rib. 6 represents a suspended ceiling. 7 is a superdifferent, 71 is a continuous opening, 72 is a cavity, and 73 is a protrusion. 8 represents the wall. 9 represents the boom assembly. 10 is a ceiling light. 11 is the hanging rail. 12 is an irregular diffuser. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0038] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0039] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms and should not be construed as indicating or implying relative importance. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0040] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 invention.

[0041] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0042] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0043] This invention provides a multifunctional space with sound field switching function, including a suspended ceiling 6 and a decorative wall set on the side wall of the multifunctional room.

[0044] The suspended ceiling 6 is fixed to the keel of the multi-functional room ceiling via a suspension rod assembly 9. The suspension rod assembly 9 includes a vertically arranged suspension rod connected to the keel and a keel connector fixed to the bottom of the suspension rod. The suspended ceiling 6 is fixed to the keel connector.

[0045] A first sound-absorbing structure is provided in part or all of the area on the ceiling panel 6. The first sound-absorbing structure includes irregularly shaped diffusers 12 and super-fine cotton sound absorbers 3. Multiple irregularly shaped diffusers 12 are arranged in an array to form a diffuser array. Super-fine cotton sound absorbers 3 are provided on both sides of the diffuser array. Some irregularly shaped diffusers 12 are embedded with lighting lamps.

[0046] The irregularly shaped diffuser 12 is a wooden structure with a hard surface and an internal cavity. It reflects and diffuses sound by utilizing its irregularly shaped surface. Multiple irregularly shaped diffusers 12 are arranged in an array to form a diffuser array. Adjacent irregularly shaped diffusers rotate 90° horizontally. By arranging and combining them in different directions, sound is reflected and diffused in different directions. When used in combination with the super-structured cotton sound absorber 3, it achieves integrated control of sound absorption and dispersion.

[0047] Ceiling lights 10 are embedded in the ceiling panels on both sides of the first sound-absorbing structure, and hanging rails 11 are fixed on the ceiling panels on both sides of the ceiling lights.

[0048] The decorative wall can be installed on all four side walls of a multi-functional room, or it can be installed on only two of the side walls. In this embodiment, the decorative wall is installed on the left and right side walls, which are opposite each other. The decorative wall on the left and right side walls has the same structure. In a preferred embodiment, a speaker and / or projector can also be installed on the front side wall.

[0049] The decorative wall includes a second sound-absorbing structure, a wall base plate 1, and an external diffusion sliding door 2. Multiple sets of the second sound-absorbing structure are provided, and the multiple sets of the second sound-absorbing structure are laid at intervals along the length of the side wall 8. The area of ​​the wall not covered by the second sound-absorbing structure is covered with the wall base plate 1. An external diffusion sliding door 2 is movably installed on the outside of each set of second sound-absorbing structures. By adjusting the position of the external diffusion sliding door 2, the sound field effect of the entire decorative wall can be switched.

[0050] The wall baseboard 1 is a wood veneer panel, which consists of a wooden frame fixed to the wall 8 and wood veneer panels fixed to the wooden frame.

[0051] Each group of second sound absorbers has the same structure, including a superstructure cotton sound absorber 3, a superstructure low-frequency sound absorber 4, and a superstructure broadband sound absorber 5, arranged side by side and adjacent to each other. In this embodiment, the arrangement order of the superstructure cotton sound absorber 3, superstructure low-frequency sound absorber 4, and superstructure broadband sound absorber 5 in each group of second sound absorber structures is the same in the left-right direction, arranged from left to right as superstructure broadband sound absorber 5, superstructure low-frequency sound absorber 4, and superstructure cotton sound absorber 3, with the outer surfaces of the superstructure broadband sound absorber 5, superstructure low-frequency sound absorber 4, and superstructure cotton sound absorber 3 being flush.

[0052] Each external diffusion sliding door 2 has two door panels, namely a first door panel 21 and a second door panel 22. Simultaneously moving some or all of the first door panels 21 or the second door panels 22 can switch the sound field effect of the entire decorative wall.

[0053] In this embodiment, the sound field effect of the decorative wall has three modes: standard sound field mode, first sound field mode, and second sound field mode.

[0054] In the standard sound field mode, the first door leaf 21 and the second door leaf 22 of all external diffusion moving doors 2 are located outside the superstructure low-frequency sound absorber 4 and the superstructure broadband sound absorber 5 of their respective second sound absorber structures to block the superstructure low-frequency sound absorber 4 and the superstructure broadband sound absorber 5. In the first sound field mode, move the corresponding door leaf of all external diffusion moving door 2 so that all the first door leaf 21 slides to the outside of the corresponding superstructure cotton sound absorber 3 so that the superstructure low frequency sound absorber 4 is exposed, while the superstructure broadband sound absorber 5 is still blocked by the second door leaf 22. In the second sound field mode, move the corresponding door panels of all external diffusion sliding doors 2 so that all the second door panels 22 slide to the outside of the wall base plate 1 so that the ultra-structural broadband sound absorber 5 is exposed and the ultra-structural low-frequency sound absorber 4 is blocked by the first door panel.

[0055] Specifically, the metamaterial sound absorber 3 is used to absorb mid-to-high frequency sound waves in the 500-5000Hz range. The metamaterial sound absorber 3 includes a second outer frame 31 and a metamaterial material 32 fixed within the second outer frame 31. A second perforated metal plate 33 is provided on one side of the metamaterial material 32, and a second cavity 35 is formed between the metamaterial material 32 and the second perforated metal plate 33. A wood veneer 34 is provided on the outer surface of the second perforated metal plate 33, and several sound-permeable holes are provided on the wood veneer 34. The wood veneer 34 serves as the outer surface of the metamaterial sound absorber 3.

[0056] In this embodiment, the second outer frame 31 is a rectangular wooden frame with an opening on one side. Multiple horizontal partitions are arranged from top to bottom within the rectangular wooden frame to divide the internal space into multiple rectangular slots. Each rectangular slot is filled with a piece of super-structured cotton material 32. The super-structured cotton material 32 is made of glass wool and has several openings, exhibiting sound-absorbing properties. Of course, in other embodiments, other sound-absorbing materials can also be used for the super-structured cotton material 32. A second cavity 35 of 100mm is maintained between the super-structured cotton material wall and the second perforated metal plate 33. The outer surface of the second perforated metal plate 33 is covered with a layer of wood veneer 34 with sound-permeable micropores. The wood veneer 34 is wood veneer, allowing sound to penetrate the wood veneer 34 and the second perforated metal plate 33 and be absorbed by the super-structured cotton material 32.

[0057] In this embodiment, the thickness of the superstructure cotton material 32 is about 150mm, and the overall thickness of the entire superstructure cotton sound absorber 3 is about 250mm.

[0058] To ensure the structural strength of the second perforated metal plate 33, multiple second anti-deformation reinforcing ribs 36 are provided on the inner side of the second perforated metal plate 33 from top to bottom.

[0059] The through holes on the second perforated metal plate 33 are round holes of 0.5-1.0 mm, with a perforation rate of 1%-3%. The second perforated metal plate 33 can be made of aluminum plate, steel plate, etc.

[0060] The superstructure low-frequency sound absorber 4 is used to absorb narrowband low-frequency sound waves in the 100-1500Hz range. The superstructure low-frequency sound absorber 4 includes a modular mounting frame 41 and multiple superstructure low-frequency sound-absorbing modules 42 fixed within the frame 41, arranged in a matrix. The superstructure low-frequency sound-absorbing modules 42 utilize the Helmholtz resonant cavity principle; their structure is existing technology and will not be described in detail here.

[0061] In this embodiment, the module mounting decorative frame 41 is also a rectangular wooden frame with an opening on the side. Multiple horizontal and vertical partitions are provided inside the rectangular wooden frame to divide the space inside the frame into multiple square slots of equal size. Each square slot is fixed with a super-structure low-frequency sound-absorbing module 42.

[0062] In this embodiment, the overall thickness of the superstructure low-frequency sound absorber 4 is about 250mm.

[0063] In a preferred embodiment, a speaker may also be embedded in the center of the superstructure low-frequency sound absorber 4.

[0064] The ultrastructure broadband sound absorber 5 is used to absorb sound waves across the entire 100-12000Hz band. The ultrastructure broadband sound absorber 5 includes a first outer frame 51 and multiple Helmholtz cavity modules 52 fixed within the first outer frame 51. The multiple Helmholtz cavity modules 52 are arranged in a matrix to form a Helmholtz cavity array. A first perforated metal plate 53 is provided on one side of the Helmholtz cavity array. A first cavity 54 is formed between the Helmholtz cavity array and the first perforated metal plate 53. A decorative fabric 55 is provided on the outer surface of the first perforated metal plate 53.

[0065] In this embodiment, the first outer frame 51 is also a rectangular wooden frame with an opening on one side. Multiple horizontal and vertical partitions are installed inside the rectangular wooden frame to divide the space inside the frame into multiple equally sized square slots. Each square slot contains a fixed Helmholtz cavity module 52. Multiple Helmholtz cavity modules 52 are connected in series to form a Helmholtz cavity array. This allows for full-band broadband targeted and precise control while reducing the wall thickness by 1 / 5, ensuring that the reverberation time difference between each frequency band is ≤0.3s and improving the average sound absorption coefficient. A 100mm first cavity 54 is maintained between the first perforated metal plate 53 and the Helmholtz cavity module wall. The outer surface of the first perforated metal plate 53 is covered with a decorative fabric 55. The decorative fabric 55 is made of a non-woven fabric of a specific color to ensure that sound can penetrate the decorative fabric 55 and the first perforated metal plate 53 and be absorbed by the Helmholtz cavity module 52. The structure of the Helmholtz cavity module 52 is existing technology and will not be described in detail here (for example, the structure shown in the publication CN118335043A, "A Complex Series-Parallel Coupled Acoustic Metamaterial and Its Preparation Method").

[0066] In this embodiment, the thickness of the Helmholtz cavity module 52 is about 150 mm, and the overall thickness of the entire ultrastructure broadband sound absorber 5 is about 250 mm.

[0067] To ensure the structural strength of the first perforated metal plate 53, multiple first anti-deformation reinforcing ribs 56 are provided on the inner side of the first perforated metal plate 53 from top to bottom.

[0068] The through holes on the first perforated metal plate 53 are round holes of 0.5-1.0 mm, with a perforation rate of 1%-3%. The first perforated metal plate 53 can be made of aluminum plate, steel plate, etc.

[0069] When sound passes through the through holes on the decorative fabric 55 and the first metal perforated plate 53, the air vibrates back and forth in the through holes. Due to the extremely small size of the through holes, the air generates viscous friction and heat conduction loss with the hole wall, thus filtering out mid-to-high frequency sound waves. Then the sound wave passes through the first cavity 54, is coupled through the first cavity 54, and enters the Helmholtz cavity module 52. At a specific frequency, the air at the opening (neck) of the Helmholtz cavity module 52 resonates with the "elastic air" inside the cavity. During resonance, the sound energy is dissipated in large quantities at the neck due to the friction of the high-speed airflow, so as to absorb low-frequency sound waves, thereby achieving a wide-bandwidth and high-efficiency sound absorption effect.

[0070] The cavity between the first perforated metal plate 53 and the Helmholtz cavity array composed of multiple Helmholtz cavity modules 52 also has certain resonant characteristics. It can broaden the frequency band, fill the sound absorption valley between the first perforated metal plate 53 and the Helmholtz cavity array, and avoid acoustic impedance mismatch caused by direct coupling between the first perforated metal plate 53 and the Helmholtz cavity array. At the same time, it can also enhance the low-frequency coupling efficiency, so that more low-frequency energy can be effectively transferred to the Helmholtz cavity module 52.

[0071] The tops of the first door leaf 21 and the second door leaf 22 of the external diffusion sliding door 2 are both set in the hanging track on the ceiling 6.

[0072] The first door leaf 21 is a door leaf with multiple super-diffusers 7 on its outer surface, including a door frame 23 and multiple anti-deformation ribs 24 set inside the door frame. Multiple super-diffusers 7 are set at intervals from top to bottom on the outer side of the door frame 23. Each super-diffuser is a long wooden frame with a through-hole 71 at the bottom and a cavity 72 inside. Protrusions 73 extend from the inner walls of the front and rear sides of the long wooden frame.

[0073] The second door leaf 22 is a regular door leaf, which includes a door frame 23 and multiple anti-deformation ribs 24 set inside the door frame.

[0074] All meta-diffusers 7 have the same length and width, but their height, the thickness and height of their internal protrusions vary slightly. The different thicknesses of the protrusions 73 result in different opening widths of the through-hole 71, while the different heights of the protrusions 73 result in different opening depths of the through-hole 71. In this embodiment, the opening width of the through-hole 71 of the meta-diffusers at some locations is 1 / 4 to 1 / 3 of its overall width; the opening width of the through-hole 71 of the meta-diffusers at some locations is 3 / 4 to 4 / 5 of its overall width.

[0075] Multiple similar-looking but differently constructed super-diffusers 7 are combined and fixed on the outer surface of the door frame 23. The hard surface of the super-diffuser 7 can diffuse and reflect sound, allowing the sound to diffuse in a wide angle range of 120°-180°, rather than being reflected in a specific direction. This avoids the sound energy being concentrated in a certain area of ​​the room (such as the center of the room). At the same time, the internal cavity structure can be used to absorb the sound entering the cavity based on the Helmholtz resonance sound absorption principle, thus achieving integrated control of sound absorption and dispersion.

[0076] In this embodiment, two sets of super-diffusers are attached and fixed to the outer surface of the first door leaf 21 (only the arrangement of one set of super-diffusers is shown in the figure). Each set of super-diffusers has 7 super-diffusers. The opening width of the through-length opening 71 of the 1st, 2nd, 3rd, 5th, and 6th super-diffusers is 3 / 4 to 4 / 5 of their overall width. The opening depth of the through-length opening 71 of the 1st, 2nd, and 5th super-diffusers is 3 / 5 of their cavity height. The opening depth of the through-length opening 71 of the 3rd super-diffuser is 4 / 5 of its cavity height. The opening depth of the through-length opening 71 of the 6th super-diffuser is 2 / 5 of its cavity height. The opening width of the through-length opening 71 of the 4th and 7th super-diffusers is 1 / 4 to 1 / 3 of their overall width, and the opening depth of the through-length opening 71 is 1 / 3 of its cavity height.

[0077] In use, the first door leaf 21 and the second door leaf 22 of the external diffusion sliding door 2 are moved by a motor. The motor can be controlled by the buttons on the control panel on the wall or by a remote control to switch the sound field effect of the entire decorative wall.

[0078] Under normal circumstances, the entire wall panel is in a standard sound field mode. In this mode, the first door leaf 21 and the second door leaf 22 of each external diffusion sliding door 2 are located outside their respective corresponding second sound-absorbing structures: the superstructure low-frequency sound absorber 4 and the superstructure broadband sound absorber 5. That is, the first door leaf 21 is located outside the superstructure low-frequency sound absorber 4 to block it, and the second door leaf 22 is located outside the superstructure broadband sound absorber 5 to block it. In this mode, only the exposed superstructure cotton sound absorber 3 absorbs sound waves, while the superstructure diffuser 7 outside the second door leaf 22 can diffuse sound in a wide angle range of 120°-180°, filling in the sound energy dead zones in the corners.

[0079] When switching the sound field effect of the entire wall panel from the standard sound field mode to the first sound field mode, move all the first door panels 21 while keeping the second door panels 22 in place. Move all the first door panels 21 to the outside of their respective corresponding superstructure cotton sound absorbers 3. At this time, the superstructure cotton sound absorbers 3 are blocked by the first door panels 21, the superstructure broadband sound absorbers 5 are still blocked by the second door panels 22, and the superstructure low-frequency sound absorbers 4 are exposed. In this mode, the superstructure low-frequency sound absorbers 4 absorb sound waves, while the superstructure diffusers 7 on the outside of the second door panels 22 can diffuse the sound in a wide angle range of 120°-180°, filling the sound energy dead angles in the corners. In this embodiment, the first sound field mode is an audio-visual mode. This mode can eliminate strong standing waves caused by low-frequency noise. With the sound-absorbing material thickness reduced by 60%, the low-frequency sound field strength G value is ≥20 dB. This not only breaks through the sound absorption limit of traditional sound-absorbing materials, but also increases the sense of space and atmosphere. At the same time, it can also accurately control the uniformity of the mid-to-high frequency sound field, keeping the uniformity of the mid-to-high frequency sound field at ±1.5 dB.

[0080] When switching the sound field effect of the entire wall panel from the standard sound field mode to the second sound field mode, move all the second door panels 22 while keeping the first door panel 21 in place. Move all the second door panels 22 to the outside of their respective adjacent wall base panels 1. At this time, the superstructure broadband sound absorber 5 and the superstructure cotton sound absorber 3 are exposed, while the superstructure low-frequency sound absorber 4 is still blocked by the first door panel 21. In this mode, the superstructure broadband sound absorber 5 and the superstructure cotton sound absorber 3 absorb sound waves, while the superstructure diffuser 7 on the outside of the second door panel 22 can diffuse the sound in a wide angle range of 120°-180°, filling the sound energy dead angles in the corners. In this embodiment, the second sound field mode is the conference mode. This mode can ensure that the speech intelligibility index (STI) of human voice frequency is ≥0.75, while realizing integrated targeted and precise control of reverberation time (RT60), reducing the room reverberation time, and making the difference of RT60 of each frequency band ≤0.3s. With the goal of quietness, focus, and comfort, it meets the user's needs for speech intelligibility, voice privacy, focus balance, and a healing sound environment.

[0081] When it is necessary to switch the sound field effect of the entire decorative wall from the first sound field mode to the second sound field mode, or from the second sound field mode to the first sound field mode, the first door panel 21 and the second door panel 22 must be moved at the same time to move the first door panel 21 and the second door panel 22 to the corresponding positions.

[0082] It should be noted that in other embodiments, when switching sound fields, only a portion of the first door leaf 21 may be moved, or only a portion of the second door leaf 22 may be moved, or both the first door leaf 21 and the second door leaf 22 may be moved simultaneously, in order to switch to more sound field modes and achieve more types of sound field effects.

[0083] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A multifunctional space with sound field switching function, characterized in that, This includes a suspended ceiling (6) fixed to the keel of the multi-functional room via a hanger assembly (9), and a decorative wall panel installed on the side wall of the multi-functional room. The ceiling (6) is provided with a first sound-absorbing structure, and ceiling lights (10) are embedded in the ceiling panels on both sides of the first sound-absorbing structure. Hanging rails (11) are fixed on the ceiling panels on both sides of the ceiling lights. The decorative wall includes a second sound-absorbing structure, a wall base plate (1), and an external diffusion sliding door (2). The second sound-absorbing structure is provided in multiple sets. Multiple sets of the second sound-absorbing structure are laid at intervals along the length of the side wall, and the area of ​​the wall not covered by the second sound-absorbing structure is covered with the wall base plate (1). An external diffusion sliding door (2) is movably provided on the outside of each set of the second sound-absorbing structure. The second sound-absorbing structure includes a super-structured cotton sound absorber (3), a super-structured low-frequency sound absorber (4), and a super-structured broadband sound absorber (5) arranged side by side. In the standard sound field mode, the first and second doors of the external diffusion sliding door (2) are located outside the super-structured low-frequency sound absorber (4) and the super-structured broadband sound absorber (5) respectively to shield the super-structured low-frequency sound absorber (4) and the super-structured broadband sound absorber (5). In the first sound field mode, the first door of the external diffusion sliding door (2) is located outside the super-structured cotton sound absorber (3) so that the super-structured low-frequency sound absorber (4) is exposed and the super-structured broadband sound absorber (5) is shielded by the second door. In the second sound field mode, the second door of the external diffusion sliding door (2) is located outside the wall base plate (1) so that the super-structured broadband sound absorber (5) is exposed and the super-structured low-frequency sound absorber (4) is shielded by the first door.

2. The multifunctional space with sound field switching function according to claim 1, characterized in that, The ceiling (6) is provided with a first sound-absorbing structure in part or all of its area. The first sound-absorbing structure includes a shaped diffuser (12) and a super-fine cotton sound absorber (3). Multiple shaped diffusers (12) are arranged in an array to form a diffuser array. The super-fine cotton sound absorber (3) is set on both sides of the diffuser array. Some of the shaped diffusers (12) are embedded with lighting lamps.

3. The multifunctional space with sound field switching function according to claim 1 or 2, characterized in that, The superstructure cotton sound absorber (3) includes a second outer frame (31) and a superstructure cotton material (32) fixed inside the second outer frame (31). A second metal perforated plate (33) is provided on one side of the superstructure cotton material (32). A second cavity (35) is formed between the superstructure cotton material (32) and the second metal perforated plate (33). A wood veneer (34) is provided on the outer surface of the second metal perforated plate (33). A number of sound-permeable micropores are provided on the wood veneer (34).

4. The multifunctional space with sound field switching function according to claim 3, characterized in that, The inner side of the second perforated metal plate (33) is provided with a plurality of second anti-deformation reinforcing ribs (36) from top to bottom.

5. The multifunctional space with sound field switching function according to claim 1, characterized in that, The tops of the first door leaf (21) and the second door leaf (22) of the external diffusion sliding door (2) are both movably mounted in the hanging rail (11).

6. The multifunctional space with sound field switching function according to claim 5, characterized in that, The first door leaf (21) includes a door frame (23) and multiple anti-deformation ribs (24) disposed inside the door frame. Multiple superstructure diffusers (7) are disposed on the outside of the door frame (23). The second door leaf (22) includes a door frame (23) and multiple anti-deformation ribs (24) set inside the door frame.

7. The multifunctional space with sound field switching function according to claim 6, characterized in that, The superstructure diffuser (7) is a long wooden frame with a continuous opening (71) at the bottom and a cavity (72) inside. The inner walls of the front and rear sides of the wooden frame have protrusions (73) extending out.

8. The multifunctional space with sound field switching function according to claim 1, characterized in that, The outer surfaces of the superstructure cotton sound absorber (3), the superstructure low-frequency sound absorber (4), and the superstructure broadband sound absorber (5) of the second sound absorber structure are flush. The superstructure cotton sound absorber (3) is used to absorb mid-to-high frequency sound waves of 500-5000HZ, the superstructure low-frequency sound absorber (4) is used to absorb narrowband low-frequency sound waves of 100-1500HZ, and the superstructure broadband sound absorber (5) is used to absorb full-band sound waves of 100-12000HZ.

9. The multifunctional space with sound field switching function according to claim 1 or 8, characterized in that, The ultrastructure broadband sound absorber (5) includes a first outer frame (51) and multiple Helmholtz cavity modules (52) fixed in the first outer frame (51). The multiple Helmholtz cavity modules (52) are arranged in a matrix to form a Helmholtz cavity array. A first metal perforated plate (53) is provided on one side of the Helmholtz cavity array. A first cavity (54) is formed between the Helmholtz cavity array and the first metal perforated plate (53). A decorative fabric (55) is provided on the outer surface of the first metal perforated plate (53).

10. The multifunctional space with sound field switching function according to claim 9, characterized in that, The inner side of the first perforated metal plate (53) is provided with a plurality of first anti-deformation reinforcing ribs (56) from top to bottom.

11. The multifunctional space with sound field switching function according to claim 1 or 8, characterized in that, The superstructure low-frequency sound absorber (4) includes a module mounting frame (41) and multiple superstructure low-frequency sound absorber modules (42) fixed in the module mounting frame (41). The multiple superstructure low-frequency sound absorber modules (42) are distributed in a matrix.

12. The multifunctional space with sound field switching function according to claim 1, characterized in that, The side walls of the multifunctional room without decorative walls are also equipped with speakers and / or projectors.

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