CN108909083B - Sound absorption and insulation sandwich plate containing labyrinth back cavity - Google Patents
Sound absorption and insulation sandwich plate containing labyrinth back cavity Download PDFInfo
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- CN108909083B CN108909083B CN201810988938.7A CN201810988938A CN108909083B CN 108909083 B CN108909083 B CN 108909083B CN 201810988938 A CN201810988938 A CN 201810988938A CN 108909083 B CN108909083 B CN 108909083B
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- labyrinth
- back cavity
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- plate
- sound
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/06—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/092—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising epoxy resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- 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
- G10K11/162—Selection of materials
- G10K11/168—Plural layers of different materials, e.g. sandwiches
Abstract
The application discloses a sound absorption and insulation sandwich plate with a labyrinth back cavity, which comprises the labyrinth back cavity, wherein a perforated plate, a damping elastic layer and a mixed metal plate are symmetrically and sequentially overlapped on the front surface and the back surface of the labyrinth back cavity. The shape of the labyrinth back cavity, the perforated plate, the damping elastic layer and the mixed metal plate is a regular shape or an irregular shape, and the regular shape comprises a circle, an ellipse and a polygon. The labyrinth back cavity, the perforated plate, the damping elastic layer and the mixed metal plate are coated with damping slurry for sealing, leakage is prevented, and the labyrinth back cavity, the perforated plate, the damping elastic layer and the mixed metal plate are fixedly connected together through bolts; the resonant efficiency is increased while the resonant cavity is increased, and the sound absorption coefficient is improved; increasing and widening the sound absorption frequency band; the sound absorption coefficient can be increased while adjusting the sound absorption frequency band.
Description
Technical Field
The application relates to the technical field of sound absorption and insulation sandwich plates, in particular to a labyrinth type resonance sound absorption structure and a variable-density metal sound insulation plate.
Background
Noise pollution is a major problem in environmental pollution control. The noise reduction method has important significance for sound insulation engineering. From the aspect of sound insulation mechanism of the material, any material has a trough for blocking sound wave spectrum, the mass of a single-layer material is larger, and the sound wave blocking of some frequencies is insufficient, so that the improvement of sound insulation quantity is restricted. If more than two sound absorption and insulation layers made of materials with different material properties are used, the respective blocking wave bands can be avoided, and simultaneously, when sound waves enter another medium from a single medium, reflection can occur at medium interfaces, so that the overall performance of the sound absorption and insulation layers in blocking and insulation can be effectively improved. Still further, add one deck elasticity damping layer below the sound insulation layer again, elasticity damping can restrain the low valley of sound insulation volume that produces because of resonance. Finally, the sound absorption layer is a core, the traditional sound absorption layer adopts sound absorption materials or adopts a structure of a perforated plate and a back cavity, the back cavity is equivalent to a plurality of parallel Helmholtz resonant cavities, the sound absorption coefficient is increased in a resonance sound absorption mode, resonance is generated when the frequency of an incident wave is consistent with the resonance frequency of a system, and at the moment, air at the holes of the perforated plate vibrates reciprocally, and the amplitude of the air reaches the maximum value.
Disclosure of Invention
The application aims to solve the technical problem of improving the sound absorption and insulation performance of a sandwich plate by optimizing the structure of the sandwich plate under the condition of not increasing the thickness of the plate, and relates to the sandwich plate with excellent sound absorption and insulation performance.
In order to solve the problems, the application adopts the following scheme:
the sound absorption and insulation sandwich plate comprises a labyrinth back cavity, wherein a perforated plate, a damping elastic layer and a mixed metal plate are symmetrically and sequentially overlapped on the front surface and the back surface of the labyrinth back cavity.
Further, the shape of the labyrinth back cavity, the perforated plate, the damping elastic layer and the mixed metal plate is a regular shape or an irregular shape, and the regular shape comprises a circle, an ellipse and a polygon.
Further, damping slurry is smeared among the labyrinth back cavity, the perforated plate, the damping elastic layer and the mixed metal plate for sealing, leakage is prevented, and the labyrinth back cavity, the perforated plate, the damping elastic layer and the mixed metal plate are fixedly connected together through bolts.
Further, the labyrinth back cavity is made of metal or nonmetal materials and comprises a plurality of labyrinth walls which are the same in shape and are sleeved concentrically, a plurality of through holes are formed in each labyrinth wall, through pipes are connected to the through holes, adjacent labyrinth walls are separated by separating walls, the labyrinth walls and the separating walls divide the labyrinth back cavity into a plurality of resonant cavities, the cavities are communicated through the through holes or the through pipes, the through holes are connected with the adjacent cavities, and the cavities and the through holes form a new resonant structure, so that a resonant sound absorption structure is increased, and the sound absorption coefficient is improved; the cavities are connected through holes or through pipes, so that the transmission path of sound waves in the labyrinth is increased. The number and the interval of the vagus walls can be adjusted as required, the volume of the small cavity can be changed by adjusting the distance between the vagus walls, the resonance frequency and the main sound absorption frequency band of the resonance cavity can be further adjusted, and the existing cavity can be divided by the dividing wall. The perforated plate and the small sound cavities are combined into a plurality of resonant cavities, each resonant cavity is different from the other resonant cavities, and the sound absorption frequency bands of the resonant cavities are widened by connecting the resonant cavities in parallel.
Further, the thickness of the vagus wall is 5-30mm, and the wall is round, polygonal or irregular; the interval between every two labyrinth walls is the same or different; the number of the dividing walls between the adjacent vagus walls is more than 2.
Further, the surface of the labyrinth wall body is adhered with a sound absorption film, and the sound absorption film is a polyethylene film or a polypropylene film. The sound wave is coupled with the sound absorption film when being transmitted in the labyrinth to convert sound wave vibration energy into heat energy to be dissipated.
Further, the number of the through holes is 1-4, the aperture is 1-5mm, the length of the through pipe is adjustable, and the outer diameter of the through pipe is matched with the aperture of the through hole. The resonant frequency of the resonant cavity can be adjusted by changing the aperture of the through hole, the main sound absorption frequency band is adjusted, and the through pipe arranged on the through hole can widen the integral sound absorption frequency band by adjusting the sound quality of the resonant cavity to adjust the resonant frequency of the resonant cavity and the main sound absorption frequency band. Meanwhile, the sound quality can be adjusted by adjusting the length of the through pipe, so that the main sound absorption frequency band of the resonant cavity is adjusted; meanwhile, the through pipe connecting the two layers of the mini palace walls increases the transmission path of sound waves, and resonance sound absorption is further improved.
Further, the mixed metal plate is of a one-layer or multi-layer structure, has the thickness of 5mm-20mm and is formed by mixing and rolling more than 2 metal materials. The mixed metal plate is formed by rolling mixed metals such as iron, aluminum and lead, the metal inside the mixed metal plate is unevenly distributed, when sound waves pass through a flat plate, reflection can occur at interfaces of different metals inside the plate, and the isolation capability is further improved.
Further, the thickness of the damping elastic layer is 3-10mm, and the damping elastic layer is made of elastic materials, wherein the elastic materials comprise rubber, damping rubber or epoxy resin. The damping elastic layer can inhibit resonance and prevent the occurrence of a sound insulation valley value generated by resonance.
Further, the perforated plate is made of metal or nonmetal, the aperture of the perforated plate is 0.5mm-5mm, the perforation rate is 0.1% -30%, the perforated plate is uniformly distributed and is circular or polygonal, and the aperture of each perforated plate is the same or different. The perforated plate is used for combining with the back cavity to form a resonant cavity structure, and the energy of sound waves is converted into heat energy through resonance sound absorption and is dissipated.
Compared with the prior art, the application has the following advantages:
1. according to the application, mixed metal is used as a sound insulation layer material, and due to uneven materials in the sound insulation layer, incident sound waves can be reflected for multiple times in the sound insulation layer, so that the sound insulation quantity is obviously improved.
2. The labyrinth back cavity is used for replacing the traditional acoustic cavity, and the labyrinth wall is provided with small holes or slits, so that each partition and the slits of the labyrinth form a new Helmholtz resonant cavity, the resonant efficiency is increased while the resonant cavity is increased, and the sound absorption coefficient is improved.
3. The perforated plate aperture of the application uses holes with various apertures, thereby increasing the sound absorption frequency band.
4. The labyrinth back cavity can widen the sound absorption frequency band by adjusting the size of the slits and the holes.
5. According to the application, the sound absorption frequency band can be adjusted and the sound absorption coefficient can be increased by adjusting the extension wall and the extension pipe of the labyrinth back cavity.
Drawings
FIG. 1 is a side view of a sound absorbing and insulating sandwich panel with a labyrinth back cavity according to an embodiment of the application.
Fig. 2 is a perspective view of a perforated plate according to an embodiment of the application.
FIG. 3 is a perspective view of a labyrinth back cavity according to an embodiment of the present application.
FIG. 4 is a front view of a labyrinth back cavity according to an embodiment of the present application.
Fig. 5 is a perspective view of a tube according to an embodiment of the present application.
Symbol description: 1-mixed metal plate, 2-damping elastic layer, 3-perforated plate, 4-labyrinth back cavity, 41-labyrinth wall, 42-through hole, 43-partition wall, 44-through pipe and 45-cavity.
Detailed Description
The following describes in further detail the embodiments of the present application with reference to the drawings and examples.
As shown in fig. 1, the sound absorption and insulation sandwich plate with the labyrinth back cavity is characterized by comprising a labyrinth back cavity 4, wherein a perforated plate 3, a damping elastic layer 2 and a mixed metal plate 1 are sequentially and symmetrically overlapped on the front surface and the back surface of the labyrinth back cavity 4.
As shown in FIG. 2, the perforated plate 3 is made of metal or nonmetal, the aperture of the perforated plate is 0.5mm-5mm, the perforation rate is 0.1% -30%, the perforated plate is uniformly distributed and is circular or polygonal, and the apertures of the perforated plates are the same or different. The perforated plate is used for combining with the back cavity to form a resonant cavity structure, and the energy of sound waves is converted into heat energy through resonance sound absorption and is dissipated.
As shown in fig. 3 and 4, the shape of the labyrinth back cavity 4, the perforated plate 3, the damping elastic layer 2 and the mixed metal plate 1 is a regular shape or an irregular shape, wherein the regular shape comprises a circle, an ellipse and a polygon, and the embodiment adopts a rectangle. The labyrinth back cavity 4, the perforated plate 3, the damping elastic layer 2 and the mixed metal plate 1 are coated with damping slurry for sealing, leakage is prevented, and the labyrinth back cavity, the perforated plate and the damping elastic layer are fixedly connected together through bolts.
The labyrinth back cavity 4 is made of metal or nonmetal materials and comprises a plurality of labyrinth wall bodies 41 which are the same in shape and are sleeved concentrically, a plurality of through holes 42 are formed in each labyrinth wall body 41, through holes 42 are connected with through pipes 44 (see figure 5), adjacent labyrinth wall bodies 41 are separated by partition walls 43, the labyrinth wall bodies 41 and the partition walls 43 divide the labyrinth back cavity 4 into a plurality of resonant cavities 45, the cavities 45 are communicated through the through holes 42 or the through pipes 44, the through holes are connected with the adjacent cavities, the cavities and the through holes form a new resonant structure, a resonant sound absorption structure is increased, and the sound absorption coefficient is improved; the cavities are connected through holes or through pipes, so that the transmission path of sound waves in the labyrinth is increased. The number and the interval of the vagus walls can be adjusted as required, the volume of the small cavity can be changed by adjusting the distance between the vagus walls, the resonance frequency and the main sound absorption frequency band of the resonance cavity can be further adjusted, and the existing cavity can be divided by the dividing wall. The perforated plate and the small sound cavities are combined into a plurality of resonant cavities, each resonant cavity is different from the other resonant cavities, and the sound absorption frequency bands of the resonant cavities are widened by connecting the resonant cavities in parallel.
The thickness of the labyrinth wall 41 is 5-30mm, and the labyrinth wall is rectangular; the intervals between the labyrinth walls 41 are the same or different; the number of dividing walls 43 between adjacent labyrinth walls 41 is 2.
The surface of the labyrinth wall 41 is adhered with a sound absorption film, and the sound absorption film is a polyethylene film or a polypropylene film. The sound wave is coupled with the sound absorption film when being transmitted in the labyrinth to convert sound wave vibration energy into heat energy to be dissipated.
The number of the through holes 42 is 2, the aperture is 1-5mm, the length of the through pipe 44 is adjustable, and the outer diameter is matched with the aperture of the through hole. The resonant frequency of the resonant cavity can be adjusted by changing the aperture of the through hole, the main sound absorption frequency band is adjusted, and the through pipe arranged on the through hole can widen the integral sound absorption frequency band by adjusting the sound quality of the resonant cavity to adjust the resonant frequency of the resonant cavity and the main sound absorption frequency band. Meanwhile, the sound quality can be adjusted by adjusting the length of the through pipe, so that the main sound absorption frequency band of the resonant cavity is adjusted; meanwhile, the through pipe connecting the two layers of the mini palace walls increases the transmission path of sound waves, and resonance sound absorption is further improved.
The mixed metal plate 1 is of a one-layer or multi-layer structure and has a thickness of 5mm-20mm, the mixed metal plate is formed by rolling mixed metals such as iron, aluminum, lead and the like, the metal inside the mixed metal plate is unevenly distributed, when sound waves pass through a flat plate, reflection can occur at interfaces of different metals inside the plate, and the sound insulation capability is further improved.
The damping elastic layer 2 has a thickness of 3-10mm and is made of an elastic material, wherein the elastic material comprises rubber, damping rubber or epoxy resin. The damping elastic layer can inhibit resonance and prevent the occurrence of a sound insulation valley value generated by resonance.
While the present application has been described in connection with the above embodiments, the present application is not limited to the above embodiments, but is only limited by the appended claims, and modifications and variations can be easily made thereto by those skilled in the art, which fall within the scope of the present application as defined by the appended claims.
Claims (8)
1. The sound absorption and insulation sandwich plate with the labyrinth back cavity is characterized by comprising the labyrinth back cavity (4), wherein a perforated plate (3), a damping elastic layer (2) and a mixed metal plate (1) are symmetrically and sequentially overlapped on the front surface and the back surface of the labyrinth back cavity (4); the labyrinth back cavity (4) is made of metal or nonmetal materials and comprises a plurality of labyrinth wall bodies (41) which are identical in shape and are sleeved concentrically, a plurality of through holes (42) are formed in each labyrinth wall body (41), through holes (42) are connected with through pipes (44) with adjustable lengths, adjacent labyrinth wall bodies (41) are separated by separating walls (43), the labyrinth wall bodies (41) and the separating walls (43) divide the labyrinth back cavity (4) into a plurality of resonant cavities (45), and the cavities (45) are communicated through the through holes (42) or the through pipes (44); the labyrinth back cavity (4), the perforated plate (3), the damping elastic layer (2) and the mixed metal plate (1) are coated with damping slurry for sealing and are connected and fixed together through bolts.
2. The sound absorbing and insulating sandwich panel with the labyrinth back cavity according to claim 1, characterized in that the shape of the labyrinth back cavity (4), the perforated plate (3), the damping elastic layer (2) and the mixed metal plate (1) is regular or irregular, and the regular shape comprises round, elliptic and polygonal.
3. The sound absorbing and insulating sandwich panel with labyrinth back cavity according to claim 1, characterized in that the thickness of the labyrinth wall (41) is 5-30mm, and the shape is circular, polygonal or irregular; the intervals among the labyrinth walls (41) are the same or different; the number of dividing walls (43) between adjacent labyrinth walls (41) is more than 2.
4. The sound absorbing and insulating sandwich panel with the labyrinth back cavity according to claim 1 or 2, characterized in that a sound absorbing film is stuck on the surface of the labyrinth wall body (41), and the sound absorbing film is a polyethylene film or a polypropylene film.
5. The sound absorbing and insulating sandwich panel with labyrinth back cavity according to claim 2, characterized in that the number of the through holes (42) is 1-4, the aperture is 1-5mm, the length of the through pipe is adjustable and the outer diameter is matched with the aperture of the through holes.
6. The sound absorption and insulation sandwich plate containing the labyrinth back cavity according to claim 1, wherein the mixed metal plate (1) is of one-layer or multi-layer structure, has the thickness of 5mm-20mm and is formed by mixing and rolling more than 2 metal materials.
7. The sound absorbing and insulating sandwich panel with the labyrinth back cavity according to claim 1, characterized in that the damping elastic layer (2) has a thickness of 3-10mm and is made of an elastic material, wherein the elastic material comprises rubber, damping glue or epoxy resin.
8. The sound absorption and insulation sandwich plate containing the labyrinth back cavity according to claim 1, characterized in that the perforated plate (3) is made of metal or nonmetal, the perforation aperture is 0.5mm-5mm, the perforation rate is 0.1% -30%, the perforation is uniformly distributed and is circular or polygonal, and the aperture of each perforation is the same or different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810988938.7A CN108909083B (en) | 2018-08-28 | 2018-08-28 | Sound absorption and insulation sandwich plate containing labyrinth back cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810988938.7A CN108909083B (en) | 2018-08-28 | 2018-08-28 | Sound absorption and insulation sandwich plate containing labyrinth back cavity |
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| Publication Number | Publication Date |
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| CN108909083A CN108909083A (en) | 2018-11-30 |
| CN108909083B true CN108909083B (en) | 2023-08-18 |
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| CN201810988938.7A Active CN108909083B (en) | 2018-08-28 | 2018-08-28 | Sound absorption and insulation sandwich plate containing labyrinth back cavity |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019002157B4 (en) * | 2019-03-26 | 2023-03-02 | Stefanie Gernert | WALL FOR LOW-FREQUENCY AND WIDE-FREQUENCY BANDINGS, MASSIVE ACOUSTIC ATTENUATION OF PLANIAL INCIDENT SOUND |
| CN110176223A (en) * | 2019-05-27 | 2019-08-27 | 西安交通大学 | A kind of arbitrary shape labyrinth type low frequency absorption device design method |
| CN110599995B (en) * | 2019-09-11 | 2021-09-28 | 北京机械设备研究所 | Sound absorption structure with adjustable absorption frequency band |
| CN112509545B (en) * | 2020-12-16 | 2022-07-12 | 上海交通大学 | Multilayer nested formula low frequency broadband sound absorbing device based on resonance sound absorption |
| CN112951191B (en) * | 2021-02-22 | 2022-10-04 | 长春理工大学 | Low-frequency broadband sound absorption composite structure and preparation method thereof |
| CN113192480A (en) * | 2021-04-29 | 2021-07-30 | 大连理工大学 | Coiled acoustic metamaterial based on Hilbert self-similar fractal |
| CN113997655B (en) * | 2021-11-09 | 2023-09-29 | 江苏科技大学 | Frequency-adjustable sound absorption and insulation light composite board and manufacturing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6569509B1 (en) * | 1998-01-09 | 2003-05-27 | Rieter Automotive (International) Ag | Ultralight, sound and shock absorbing component set |
| JP2016027401A (en) * | 2014-07-01 | 2016-02-18 | 株式会社日本コンポジット工業 | Sound absorption structure |
| CN105719638A (en) * | 2014-12-04 | 2016-06-29 | 北京市劳动保护科学研究所 | Composite resonance sound absorption structure |
| CN209111647U (en) * | 2018-08-28 | 2019-07-16 | 华南理工大学 | A kind of sound absorption sandwich plate of the back chamber containing labyrinth |
-
2018
- 2018-08-28 CN CN201810988938.7A patent/CN108909083B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6569509B1 (en) * | 1998-01-09 | 2003-05-27 | Rieter Automotive (International) Ag | Ultralight, sound and shock absorbing component set |
| JP2016027401A (en) * | 2014-07-01 | 2016-02-18 | 株式会社日本コンポジット工業 | Sound absorption structure |
| CN105719638A (en) * | 2014-12-04 | 2016-06-29 | 北京市劳动保护科学研究所 | Composite resonance sound absorption structure |
| CN209111647U (en) * | 2018-08-28 | 2019-07-16 | 华南理工大学 | A kind of sound absorption sandwich plate of the back chamber containing labyrinth |
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