A biomimetic noise reduction board

Abstract

This utility model discloses a biomimetic noise reduction panel, comprising a sound-absorbing layer with a porous micro-nano structure disposed in the middle, and damping layers disposed on both sides of the sound-absorbing layer. Both damping layers are disposed on a mesh-like support plate. The edges of the support plate are encapsulated by four connecting blocks to form a square plate. The opposing connecting blocks on both sides form a set of connecting units. Two connecting blocks in a connecting unit are spliced ​​together by plug-in components to expand the size of the biomimetic noise reduction panel. The plug-in components are detachable. The sound-absorbing layer contains a porous micro-nano structure, structurally mimicking the scales of a lepidopteran insect wing. In terms of noise reduction performance, this noise reduction panel can stably cover a wide frequency range of 20Hz to 5kHz, with a noise reduction rate between 20.1% and 39.8%. Compared with the average noise reduction rate of 14.6% of traditional materials, its performance is improved by more than 50%, especially achieving a breakthrough in overcoming the industry challenge of low-frequency noise blocking.

Description

Technical Field

[0001] This utility model relates to the field of sound insulation and noise reduction, specifically to a biomimetic noise reduction board. Background Technology

[0002] Sound insulation panels are boards used to block sound transmission. They achieve sound insulation by dissipating sound energy through differences in medium density or by converting sound energy into heat energy through damping effects, with an average sound insulation of 30dB. In existing technologies, some sound insulation panels are made by installing a rubber layer, vibration damping material, or sound insulation felt between two boards. While this method can improve sound insulation to some extent in the short term, its effectiveness gradually decreases over time, resulting in a short lifespan and high cost. Furthermore, both the vibration damping material and the sound insulation layer are relatively rough and cannot effectively block low-to-mid frequency and mid-to-high frequency noise. Utility Model Content

[0003] To address the aforementioned shortcomings of existing technologies, this utility model provides a biomimetic noise reduction board that solves the problems of limited noise reduction frequency band, material weight, environmental protection, and cost associated with traditional noise reduction materials.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows: A biomimetic noise reduction board is provided, which includes a sound-absorbing layer with a porous micro-nano structure disposed in the middle, a damping layer disposed on both sides of the sound-absorbing layer, and both damping layers disposed on a mesh support plate. The edge of the support plate is encapsulated by four connecting blocks to form a square plate. The opposite connecting blocks on both sides serve as a set of connecting units. Two connecting blocks in the connecting unit are spliced ​​together by plug-in components to expand the size of the biomimetic noise reduction board. The plug-in components are detachable.

[0005] Furthermore, the plug-in assembly includes a slot disposed on one side of the connecting block and several inserts disposed on the other side of the connecting block. The slot is disposed along the length of the connecting block, the several inserts are inserted into the slot, and the side of the slot is provided with several screws that are threadedly connected to the inserts.

[0006] Furthermore, a through-hole is provided on the side of the slot, the through-hole being set along the length of the slot, and the screw is inserted into the slot through the through-hole and threadedly connected to the threaded hole on the insert.

[0007] Furthermore, a countersunk groove is formed on the side of the slot opposite to the slotted hole, and the end of the screw extends into the countersunk groove.

[0008] Furthermore, the sound-absorbing layer is made of porous polyester fiber sound-absorbing cotton, and the vibration-damping layer is a rubber damping sheet. Furthermore, the damping sheet and the sound-absorbing layer are bonded and fixed together by an adhesive layer.

[0009] The beneficial effects of this utility model are as follows: This solution designs the noise reduction board as a three-layer composite structure of a shock-absorbing layer, a sound-absorbing layer, and a shock-absorbing layer, and constructs an external mesh support structure to ensure that the sound absorption and noise reduction performance is not affected while the installation is supported. A porous micro-nano structure is set within the sound-absorbing layer, structurally mimicking the scales of a lepidopteran insect's wing. In terms of noise reduction performance, this noise reduction board can stably cover a wide frequency range from 20Hz to 5kHz, with a noise reduction rate between 20.1% and 39.8%. Compared with the average noise reduction rate of 14.6% of traditional materials, its performance is improved by more than 50%, especially achieving a breakthrough in overcoming the industry challenge of low-frequency noise blocking.

[0010] The two damping layers utilize 1.2mm thick environmentally friendly rubber damping sheets, effectively reducing vibrations and protecting the middle sound-absorbing layer from environmental erosion. The middle sound-absorbing layer is a 10mm thick biomimetic module of polyester fiber sound-absorbing cotton with an optimized nano-porous structure on its surface, increasing sound energy reflection and dissipation, thereby improving overall durability and stability. The entire noise reduction panel is only 12.4mm thick, featuring lightweight and flexible characteristics, adaptable to complex installation scenarios, and space-saving design. Regarding environmental performance, the polyester fiber sound-absorbing cotton and environmentally friendly rubber used in this noise reduction panel are both 100% recyclable materials. The production process is energy-efficient and does not release harmful substances; after use, the materials are easily degraded or recycled, aligning with sustainable development principles. The application scenarios of biomimetic noise reduction panels are very wide. Through the design of plug-in components, the area can be expanded and spliced ​​to adapt to different application scenarios. The operation is simple and convenient. These include residential sound insulation walls and office building partitions in the construction field, highway sound barriers and rail transit tunnel walls in the transportation field, and equipment noise reduction wrapping in the industrial field, which can meet the customized needs of different scenarios. Attached Figure Description

[0011] Figure 1 This is a side view of the biomimetic noise reduction board.

[0012] Figure 2 This is a structural diagram of the support plate.

[0013] Figure 3 This is a structural diagram of the plug-in assembly.

[0014] Among them, 1. sound-absorbing layer, 2. first connecting block, 3. second connecting block, 4. insert, 5. shock-absorbing layer, 6. slot, 7. screw, 8. support plate, 9. strip hole, 10. threaded hole, 11. groove. Detailed Implementation

[0015] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0016] like Figures 1-3 As shown, a biomimetic noise reduction panel includes a sound-absorbing layer 1 with a porous micro-nano structure disposed in the middle. Both sides of the sound-absorbing layer 1 are provided with damping layers 5, which are both disposed on a mesh support plate 8. The edges of the support plate 8 are encapsulated by four connecting blocks to form a square plate. The opposite connecting blocks on both sides form a set of connecting units. Two connecting blocks in a connecting unit are spliced ​​together by plug-in components to expand the size of the biomimetic noise reduction panel. The plug-in components are detachable. The sound-absorbing layer 1 is made of porous polyester fiber sound-absorbing cotton, and the damping layer 5 is a rubber damping sheet. The damping sheet is bonded and fixed to the sound-absorbing layer 1 by an adhesive layer. Environmentally friendly adhesive is applied to the damping layers 5 respectively, and the combination is hot-pressed and cured at 60-80°C to form the final three-layer composite structure.

[0017] The plug-in assembly includes a slot 6 disposed on one side of the connecting block (second connecting block 3) and a plurality of inserts 4 disposed on the other side of the connecting block (first connecting block 2). The slot 6 is disposed along the length of the connecting block, the plurality of inserts 4 are inserted into the slot 6, and a plurality of screws 7 are disposed on the side of the slot 6 to be threadedly connected to the inserts 4.

[0018] A through-hole 9 is provided on the side of the slot 6. The through-hole 9 is set along the length of the slot 6. The screw 7 is inserted into the slot 6 through the through-hole 9 and threaded into the threaded hole 10 on the insert 4. A countersunk groove 11 is provided on the side of the slot 6 opposite to the through-hole 9. The end of the screw 7 extends into the countersunk groove 11. The size of the countersunk groove 11 is aligned with the size and height of the through-hole 9.

[0019] The bionic noise reduction panels can be installed and assembled using the plug-in assembly. When installed on the ground or a side wall, the plug-in assembly can be fixed by connecting to the fixing screws 7 on the ground or wall, thus securing the insert 4 to the fixing component via the screws 7. During assembly, the insert 4 is inserted into the slot 6, and then the screw 7 is inserted into the slot 6 through the strip hole 9 on the side, connecting with the threaded hole 10 of the insert 4 to fix the two bionic noise reduction panels. The operation is simple and convenient. The end of the tightened screw 7 extends directly into the recess 11, avoiding damage to the side wall of the slot 6 by an excessively long screw 7, and also preventing the screw 7 from not being tightened properly to the insert 4.

[0020] This solution designs the noise reduction panel as a three-layer composite structure consisting of a vibration-damping layer 5, a sound-absorbing layer 1, and another vibration-damping layer 5. An external mesh support structure is constructed to ensure that the sound absorption and noise reduction performance is not compromised during installation. A porous micro-nano structure, mimicking the scales of a lepidopteran insect wing, is incorporated within the sound-absorbing layer 1. In terms of noise reduction performance, this noise reduction panel can stably cover a wide frequency range from 20Hz to 5kHz, with a noise reduction rate between 20.1% and 39.8%. Compared to the average noise reduction rate of 14.6% for traditional materials, its performance is improved by more than 50%, achieving a breakthrough, particularly in overcoming the industry challenge of low-frequency noise blocking.

[0021] The two damping layers 5 utilize 1.2 mm thick environmentally friendly rubber damping sheets, effectively reducing vibrations and protecting the intermediate sound-absorbing layer 1 from environmental corrosion. The intermediate sound-absorbing layer 1 is a 10 mm thick biomimetic module of polyester fiber sound-absorbing cotton with an optimized nano-porous structure on its surface, increasing the multiple reflections and dissipation of sound energy, thereby improving overall durability and stability. The entire noise reduction panel is only 12.4 mm thick, featuring lightweight and flexibility, adapting to complex installation scenarios and saving space. Regarding environmental performance, the polyester fiber sound-absorbing cotton and environmentally friendly rubber used in this solution are 100% recyclable materials. During production, energy consumption is low and no harmful substances are released; after use, the materials are easily degraded or recycled, aligning with sustainable development principles. The application scenarios of biomimetic noise reduction panels are very wide. Through the design of plug-in components, the area can be expanded and spliced ​​to adapt to different application scenarios. The operation is simple and convenient. These include residential sound insulation walls and office building partitions in the construction field, highway sound barriers and rail transit tunnel walls in the transportation field, and equipment noise reduction wrapping in the industrial field, which can meet the customized needs of different scenarios.

Claims

1. A biomimetic noise reduction board, characterized in that, It includes a sound-absorbing layer with a porous micro-nano structure in the middle, and a damping layer on both sides of the sound-absorbing layer. The damping layers on both sides are set on a mesh support plate. The edge of the support plate is encapsulated by four connecting blocks to form a square plate. The connecting blocks on opposite sides form a set of connecting units. The two connecting blocks in the connecting unit are spliced ​​together by plug-in components to expand the size of the bionic noise reduction board. The plug-in components are detachable.

2. The biomimetic noise reduction board according to claim 1, characterized in that, The plug-in assembly includes a slot on one side of the connecting block and several inserts on the other side of the connecting block. The slot is arranged along the length of the connecting block, and the inserts are inserted into the slot. The side of the slot is provided with several screws that are threadedly connected to the inserts.

3. The biomimetic noise reduction board according to claim 2, characterized in that, The slot has a through-hole on its side, which is set along the length of the slot. The screw is inserted into the slot through the through-hole and threaded into the threaded hole on the insert.

4. The biomimetic noise reduction board according to claim 3, characterized in that, A countersunk groove is formed on the side of the slot opposite to the slot hole, and the end of the screw extends into the countersunk groove. The countersunk groove is aligned with the slot hole in both size and height.

5. The biomimetic noise reduction board according to claim 1, characterized in that, The sound-absorbing layer is made of porous polyester fiber sound-absorbing cotton, and the vibration-damping layer is made of rubber damping sheet.

6. The biomimetic noise reduction board according to claim 5, characterized in that, The damping sheet and the sound-absorbing layer are bonded and fixed together by an adhesive layer.

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