CN113314089A - Sound insulation structure with low-frequency broadband sound insulation function - Google Patents
Sound insulation structure with low-frequency broadband sound insulation function Download PDFInfo
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- CN113314089A CN113314089A CN202110693682.9A CN202110693682A CN113314089A CN 113314089 A CN113314089 A CN 113314089A CN 202110693682 A CN202110693682 A CN 202110693682A CN 113314089 A CN113314089 A CN 113314089A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
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Abstract
本发明提供的一种具有低频宽带隔声功能的隔声结构，属于隔声技术领域，包括：多个周期性排列的隔声单元；所述隔声单元包括：基体，所述基体适于朝向声源设置；共振体，设置在所述基体的一侧面；所述共振体上开设有通槽；所述通槽内连接有悬臂板；所述悬臂板的边缘与所述通槽的内壁具有间隙；支柱，具有多根；所述支柱的一端与所述基体连接，另一端与所述共振体连接；本发明的具有低频宽带隔声功能的隔声结构，传声损失增加40％以上，提升了材料声波衰减能力。
The invention provides a sound insulation structure with a low frequency and broadband sound insulation function, belonging to the technical field of sound insulation, comprising: a plurality of periodically arranged sound insulation units; the sound insulation units include: a base body, and the base body is suitable for facing The sound source is arranged; the resonance body is arranged on one side of the base body; the resonance body is provided with a through slot; the through slot is connected with a cantilever plate; the edge of the cantilever plate and the inner wall of the through slot have gaps; pillars with a plurality of pillars; one end of the pillars is connected with the base body, and the other end is connected with the resonant body; the sound insulation structure with the low frequency and broadband sound insulation function of the present invention increases the sound transmission loss by more than 40%, Improved material sound wave attenuation.
Description
Technical Field
The invention relates to the technical field of sound insulation, in particular to a sound insulation structure with a low-frequency broadband sound insulation function.
Background
Noise in nature or life mostly occurs in a low frequency range (hundred hertz level), such as noise of automobile running, train vibration sound, construction site sound, and the like. However, these commonly existing low frequency noise is difficult to eliminate and low frequency noise control remains a difficult problem in the acoustic field.
In the last 20 years, with the appearance and development of acoustic metamaterials, low-frequency noise control technology has advanced in stages. The local resonance acoustic metamaterial is an artificial material structure which utilizes the vibration characteristic of a structural unit to prevent sound waves from being transmitted, and can realize low-frequency sound insulation of a specific frequency band with smaller areal density.
In the structure in the prior art, the sound insulation effect is poor, so that a sound insulation structure with good sound insulation effect is needed.
Disclosure of Invention
Therefore, the invention aims to overcome the defect of poor sound insulation effect in the prior art, and provides a sound insulation structure with a low-frequency broadband sound insulation function.
In order to solve the technical problem, the sound insulation structure with the low-frequency broadband sound insulation function comprises a plurality of sound insulation units which are periodically arranged; the sound insulation unit includes:
a base adapted to be disposed toward a sound source;
a resonator disposed on one side of the base; a through groove is formed in the resonance body; a cantilever plate is connected in the through groove; a gap is formed between the edge of the cantilever plate and the inner wall of the through groove; the resonance body and the cantilever plate form a resonance structure;
a pillar having a plurality of pieces; one end of the strut is connected with the base body, and the other end of the strut is connected with the resonance body.
Preferably, the resonator and the base are both of a cubic structure, and the areas of the opposing surfaces are the same.
Preferably, the thickness of the substrate is 1-4mm, and the side length is 1-30 mm; the height of the pillar is 5-10mm, the thickness of the resonance structure is 1-3mm, and the side length is 1-30 mm.
Preferably, the pillar is in a quarter-ring structure; the pillars of the four sound insulation units are enclosed to form a hollow cylinder; the radius of the cylinder is 2-3 mm.
Preferably, the resonator forms the cantilever plate by means of 3D printing or laser cutting.
Preferably, each resonance body is provided with a cantilever plate; the resonance body is connected with the cantilever plate through a connecting part.
Preferably, each resonance body is provided with at least two cantilever plates which are mutually used; the resonance body is connected with the cantilever plate through a connecting part.
Preferably, the gap between the edge of the cantilever plate and the inner wall of the through groove is d, and d is 1-3 mm.
Preferably, the base body, the pillar and the resonator are machined by mechanical cutting or 3D printing thermoforming.
Preferably, the shape of the cantilever plate is an equilateral triangle; the connecting part is arranged on one edge of the triangular cantilever plate.
Preferably, the shape of the cantilever plate is square, rectangle, circle, semicircle or triangle.
Preferably, the base and the resonator are formed of a light-transmitting material.
The technical scheme of the invention has the following advantages:
1. the sound insulation structure with the low-frequency broadband sound insulation function comprises a plurality of sound insulation units which are periodically arranged; the sound insulation unit includes: a base, a resonator, and a strut; after the sound waves vertically enter the base body from the sound source, energy is transmitted to the resonance body along the support column, and vibration energy dissipation of a resonance structure formed by the resonance body and the cantilever plate at specific frequency is triggered, so that vibration of the base body, the support column and the resonance structure is restrained, transmitted sound energy is effectively reduced, and sound insulation performance of the structure is improved. Compared with the traditional sound insulation structure, the structure provided by the invention has the advantages that the sound transmission loss is increased by more than 40%, and the sound wave attenuation capability of the material is improved.
2. According to the sound insulation structure with the low-frequency broadband sound insulation function, the support column is of a quarter-ring structure; the pillars of the four sound insulation units are enclosed to form a hollow cylinder; a hollow structure is formed, the weight of the sound insulation unit is reduced, and resonance can occur.
3. According to the sound insulation structure with the low-frequency broadband sound insulation function, the base body, the pillar and the resonance body are processed in a mechanical cutting mode or 3D printing thermoforming mode; each structure can be independently processed in a split mode, the manufacturability is better, and the production cost is controllable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic perspective view of a sound insulation structure according to the present invention.
Fig. 2 is a schematic view of a first angular perspective structure of the sound-proof unit according to the present invention.
Fig. 3 is a front view of the sound-proof unit of the present invention.
Fig. 4 is a second perspective view of the sound-proof unit according to the present invention.
Fig. 5 is a schematic perspective view of another embodiment of the sound-proof unit according to the present invention.
Description of reference numerals:
1. a sound insulation unit; 2. a substrate; 3. a pillar; 4. a resonating body; 5. a cantilever plate; 6. a resonant structure; 7. a gap; 8. a connecting portion.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The sound insulation structure with the low-frequency broadband sound insulation function provided by the embodiment comprises a plurality of sound insulation units 1 which are periodically arranged, as shown in fig. 1; this sound insulation structure has overcome the shortcoming that is not enough at the low frequency sound insulation, and the device simple structure simultaneously, processing is simple and convenient, and each structure split type independent processing, the manufacturability is better, and manufacturing cost is controllable, compares in traditional structure, and the sound loss of low frequency sound insulation transaudient can increase more than 40%, can effectively promote the sound wave attenuation ability of material.
As shown in fig. 2, each sound-proof unit 1 includes: a base 2, a pillar 3, and a resonator 4; a through groove is arranged on the resonance body 4; a cantilever plate 5 is connected in the through groove; a gap 7 is formed between the edge of the cantilever plate 5 and the inner wall of the through groove, and the gap is 1-3 mm; the resonance body 4 and the cantilever plate 5 form a resonance structure 6; the resonance effect of the resonance structure 6 suppresses the structural vibration of the base body 2, and reduces the transmitted acoustic energy.
The substrate 2, the pillar 3 and the resonator 4 are all made of Polymethyl methacrylate (PMMA for short); the base body 2 is of a thin plate-like structure, the support column 3 is of a rigid structure, and the resonator 4 is also of a thin plate-like structure.
As shown in FIG. 3, the substrate 2 is a cube structure with a thickness of 1-4mm and a side length of 1-30 mm; the resonator 4 is in a cube structure with the thickness of 1-3mm and the side length of 1-30 mm; the resonance body 4 is fixedly arranged on one side surface of the base body 2 at intervals through the support 3; the cross-sectional areas of the opposite surfaces of the resonant body 4 and the base body 2 are the same, and the resonant body 4 and the base body 2 are completely opposite;
specifically, as shown in fig. 4, each sound insulation unit 1 has four pillars 3, the four pillars 3 are respectively disposed at four corners of the base 2, one end of each pillar is connected to the base 2, and the other end of each pillar is connected to the resonator 4; the height of the pillars 3 is 5-10 mm. Further, the support 3 is of a quarter-ring structure; the pillars 3 of the four sound-proof units 1 arranged around one end point can just enclose a hollow cylinder with the radius of 2-3 mm.
The resonance bodies 4 are arranged on one side surface of the base body 2 at intervals, and the resonance bodies 4 are cut by adopting a laser cutting technology to form a cantilever plate 5;
as an alternative embodiment, the resonator body 4 and the cantilever plate 5 may be directly formed by 3D printing.
The edge of the cantilever plate 5 is connected to the inner side of the resonator 4 through a connecting portion 8, and each cantilever plate 5 is connected to the resonator 4 through only one connecting portion 8.
Specifically, the cantilever plate 5 may be one, and as shown in fig. 5, the shape thereof may be a square, a rectangle, a circle, a semicircle or a triangle, and is preferably an equilateral triangle in the present embodiment.
As an alternative embodiment, a combination of cantilever plates 5 with different shapes can be cut on the resonant body 4 to form a double-resonant structure 6, and the two cantilever plates 5 with different shapes are matched with each other to expand the sound insulation frequency band range.
The substrate 2 may be a metal plate or a non-metal plate, such as PMMA, ABS-PMMA, etc.
The base body 2 and the resonator 4 are formed of a light-transmitting material, so that the entire structure can achieve good light transmission.
The sound insulation structure with the low-frequency broadband sound insulation function of the embodiment is manufactured by the following steps:
the substrate 2 is processed, and appropriate materials and thicknesses can be selected according to actual conditions, and cutting modes such as cutting or laser and the like are adopted; 3D printing thermoforming processing can be carried out, which is a cheap and widely used production process, is closer to practical application, and avoids using expensive non-common industrial manufacturing process;
the pillar 3 is processed, rigid structural materials are required to be selected, the base body 2 and the resonance structure 6 are connected, and machining modes such as cutting, laser and the like or 3D printing thermoforming processing can be adopted;
machining the resonance body 4 by adopting a mechanical cutting mode such as cutting or laser or 3D printing thermoforming; the cantilever plates 5 with different shapes and sizes are processed according to specific target frequency, and the two cantilever plates 5 with different sizes and shapes can be combined to form a double-resonance structure 6, so that the sound insulation frequency band range of the metamaterial is widened.
In each sound insulation unit 1, a base body 2 and a resonator 4 are connected by using pillars 3 at four corners, if a mechanical cutting method is adopted for processing, when the whole structure is combined, the pillars 3 can be supported by using rectangles, and the supporting and transmitting effects are better; if 3D printing thermoforming processing is adopted, the support column 3 and the resonance body 4 are formed together and then attached to the base body 2, and a good application effect is achieved.
The three structures of the base body 2, the pillar 3 and the resonance structure 6 have the advantages of easy processing, light and convenient device, convenient installation, low production cost and obvious sound insulation effect
Method of use and principles
The base body 2 of the sound insulation structure is arranged facing a sound source, after the sound wave vertically enters the base body 2 from the sound source, energy is transmitted to the resonance structure 6 along the pillar 3 structure, and the vibration energy dissipation of the resonance structure 6 at specific frequency is triggered, so that the vibration of the base body 2, the pillar 3 and the resonance structure 6 is inhibited, the transmitted sound energy is effectively reduced, and the sound insulation performance of the structure is improved; according to the principle, cantilever plates 5 with different structural forms can be combined to form a multi-resonance structure 6, so that the sound insulation frequency band range of the structure is widened. Compared with the traditional sound insulation structure, the structure provided by the invention has the advantages that the sound transmission loss is increased by more than 40%, and the sound wave attenuation capability of the material is improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A sound insulation structure with a low-frequency broadband sound insulation function is characterized by comprising a plurality of sound insulation units (1) which are periodically arranged; the sound insulation unit (1) comprises:
a base body (2), said base body (2) being adapted to be arranged towards a sound source;
a resonator (4) provided on one side surface of the base (2); a through groove is formed in the resonance body (4); a cantilever plate (5) is connected in the through groove; a gap (7) is formed between the edge of the cantilever plate (5) and the inner wall of the through groove; the resonance body (4) and the cantilever plate (5) form a resonance structure (6);
a plurality of pillars (3); one end of the strut (3) is connected with the base body (2), and the other end of the strut is connected with the resonance body (4).
2. The sound insulation structure with the low-frequency broadband sound insulation function according to claim 1, wherein the resonator (4) and the base body (2) are of a cube structure, and the areas of the opposite surfaces of the resonator and the base body are the same.
3. The sound insulation structure with the low-frequency broadband sound insulation function according to claim 2, wherein the thickness of the base body (2) is 1-4mm, and the side length is 1-30 mm; the height of the pillar (3) is 5-10mm, the thickness of the resonance structure (6) is 1-3mm, and the side length is 1-30 mm.
4. A sound insulation structure having a low-frequency broadband sound insulation function according to claim 2, wherein the pillar (3) has a quarter-ring structure; the pillars (3) of the four sound insulation units (1) are enclosed into a hollow cylinder shape; the radius of the cylinder is 2-3 mm.
5. The sound insulation structure with low-frequency broadband sound insulation function according to claim 1, characterized in that the resonator body (4) is formed into the cantilever plate (5) by means of 3D printing or laser cutting.
6. The sound insulation structure with the low-frequency broadband sound insulation function according to claim 5, wherein a cantilever plate (5) is arranged on each resonance body (4); the resonance body (4) and the cantilever plate (5) are connected through a connecting part (8).
7. A sound insulation structure with low-frequency broadband sound insulation function according to claim 5, characterized in that at least two mutually used cantilever plates (5) are arranged on each resonance body (4); the resonance body (4) and the cantilever plate (5) are connected through a connecting part (8).
8. The sound insulation structure with the low-frequency broadband sound insulation function according to claim 5, wherein a gap (7) between the edge of the cantilever plate (5) and the inner wall of the through groove is d, and d is 1-3 mm.
9. The sound insulation structure with the low-frequency broadband sound insulation function according to claim 1, wherein the base body (2), the pillar (3) and the resonator (4) are machined by mechanical cutting or 3D printing and thermoforming.
10. The sound insulation structure with low-frequency broadband sound insulation function according to claim 7, characterized in that the shape of the cantilever plate (5) is an equilateral triangle; the connecting part (8) is arranged on one side of the triangular cantilever plate (5).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110693682.9A CN113314089A (en) | 2021-06-22 | 2021-06-22 | Sound insulation structure with low-frequency broadband sound insulation function |
| AU2022300066A AU2022300066B2 (en) | 2021-06-22 | 2022-07-26 | Sound insulation structure having low-frequency broadband sound insulation function |
| PCT/CN2022/107999 WO2022268233A1 (en) | 2021-06-22 | 2022-07-26 | Sound insulation structure having low-frequency broadband sound insulation function |
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| CN202110693682.9A CN113314089A (en) | 2021-06-22 | 2021-06-22 | Sound insulation structure with low-frequency broadband sound insulation function |
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| AU (1) | AU2022300066B2 (en) |
| WO (1) | WO2022268233A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022268233A1 (en) * | 2021-06-22 | 2022-12-29 | 国网智能电网研究院有限公司 | Sound insulation structure having low-frequency broadband sound insulation function |
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2021
- 2021-06-22 CN CN202110693682.9A patent/CN113314089A/en active Pending
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| Publication number | Publication date |
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| WO2022268233A1 (en) | 2022-12-29 |
| AU2022300066B2 (en) | 2025-02-20 |
| AU2022300066A1 (en) | 2024-01-18 |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: 102209 Beijing City, the future of science and Technology City Binhe Road, No. 18, No. Applicant after: State Grid Smart Grid Research Institute Co.,Ltd. Applicant after: STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Applicant after: JINHUA POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Applicant after: BEIJING MUNICIPAL INSTITUTE OF LABOUR PROTECTION Address before: 102209 Beijing City, the future of science and Technology City Binhe Road, No. 18, No. Applicant before: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE Co.,Ltd. Country or region before: China Applicant before: STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Applicant before: JINHUA POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Applicant before: BEIJING MUNICIPAL INSTITUTE OF LABOUR PROTECTION |