CN113257216A - Magnetic low-frequency broadband sound absorption and insulation board - Google Patents
Magnetic low-frequency broadband sound absorption and insulation board Download PDFInfo
- Publication number
- CN113257216A CN113257216A CN202110695091.5A CN202110695091A CN113257216A CN 113257216 A CN113257216 A CN 113257216A CN 202110695091 A CN202110695091 A CN 202110695091A CN 113257216 A CN113257216 A CN 113257216A
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- frame
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- 238000009413 insulation Methods 0.000 title claims abstract description 52
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 50
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 238000011160 research Methods 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000012814 acoustic material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Classifications
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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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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B1/8409—Sound-absorbing elements sheet-shaped
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B1/86—Sound-absorbing elements slab-shaped
Abstract
The invention provides a magnetic low-frequency broadband sound absorption and insulation board which comprises a frame, a grid and an acoustic piece, wherein the grid divides an area into a plurality of cavity units, the acoustic piece is arranged on one side of the grid and plugs ports of the cavity units close to one side of the acoustic piece, a plurality of magnetic pieces are arranged on one side of the acoustic piece, which is far away from the grid, at intervals, and the magnetic pieces correspond to the cavity units one by one; and a magnet is arranged at the port of one side of the cavity unit, which is far away from the acoustic piece, and the magnet is connected with the grid through a fixing piece. According to the magnetic low-frequency broadband sound absorption and insulation board provided by the invention, the magnetic field strength of the magnets in the same row is linearly or nonlinearly changed, so that the sound absorption or insulation frequency of each cavity unit is different, the sound insulation or sound absorption bandwidth of the sound absorption and insulation board is greatly expanded, and the nonlinear adsorption force between the magnets and the magnetic parts acts, so that the structure has a new sound wave action mechanism, namely a magnetic coupling resonance mechanism, is not influenced by the thickness of a frame, and has ultrathin and ultralow-frequency sound absorption and insulation performance.
Description
Technical Field
The invention relates to the field of building noise protection control, in particular to a magnetic low-frequency broadband sound absorption and insulation board.
Background
In the field of building noise protection and control, a film or a thin plate is combined with a closed cavity to form a resonance sound absorption and insulation structure, the sound absorption and insulation characteristics of the resonance sound absorption and insulation structure are related to the tension, the surface density and the back cavity depth of the film or the thin plate, and the resonance sound absorption and insulation structure has better sound absorption and insulation performance near the resonance frequency. The conventional linear acoustic material has a plurality of limitations in practical engineering application, and particularly, the attenuation of low-frequency sound generally needs a huge scale which can be compared with the wavelength of sound wave. Therefore, the implementation of a thin and light structure to dissipate sound waves, especially low frequency waves, has been a challenging task, and the implementation of a small and compact subwavelength structure has important theoretical and practical significance for noise control.
Due to the special physical characteristics of the acoustic metamaterial, the acoustic metamaterial can realize the attenuation of sub-wavelength sound waves, has the characteristics of light weight and compact space, and has gradually become a hot point of research. The existing acoustic metamaterial still has some disadvantages: in the aspect of acoustic performance, the effective sound insulation frequency is not low enough, and the STL bandwidth is narrow; in the aspect of applicability, the structure size is large and thick, the rigid support frame is difficult to deform, the structure is complex, and in addition, the research of most acoustic metamaterials mainly takes small sample pieces and theoretical research; the test and verification in an acoustic impedance tube are mostly carried out by adopting a plane wave radiation mode, and the sound insulation performance research of a large-size model in a reverberation sound field is lacked. In practical application, the metamaterial is often applied to the condition of a reverberation-like sound field in a large-area structure form.
Disclosure of Invention
The invention provides a magnetic low-frequency broadband sound absorption and insulation board, which is used for solving the problems of insufficient sound insulation frequency, narrow low-frequency sound wave dissipation bandwidth, large structural size and heavy weight of the existing sound absorption and insulation board.
The invention provides a magnetic low-frequency broadband sound absorption and insulation board, which comprises:
a frame provided with a connection assembly;
the grid is arranged in an area enclosed by the frame, and the grid divides the area into a plurality of cavity units;
the acoustic piece is arranged on one side of the grid and plugs a port of the cavity unit close to one side of the acoustic piece, the acoustic piece is respectively connected with the frame and the grid, a plurality of magnetic suction pieces are arranged on one side of the acoustic piece away from the grid at intervals, and the magnetic suction pieces are in one-to-one correspondence with the cavity units; and a magnet is arranged at a port of one side of the cavity unit, which is far away from the acoustic piece, and the magnet is connected with the grid through a fixing piece.
According to the magnetic low-frequency broadband sound absorption and insulation plate provided by the invention, the connecting component comprises a clamping tongue and a clamping groove which are arranged at the outer edge of the frame.
According to the magnetic low-frequency broadband sound absorption and insulation plate provided by the invention, the fixing piece is a bottom plate, the bottom plate is connected with the grid, and a port of one side of the cavity unit, which is far away from the acoustic piece, is blocked; the magnet is arranged on the bottom plate and is positioned in the center of the port on the side, away from the acoustic piece, of the cavity unit.
According to the magnetic low-frequency broadband sound absorption and insulation plate provided by the invention, the fixing piece is a support frame, the support frame is connected with the grid, and the magnet is arranged on the support frame and is positioned in the center of the port on one side of the cavity unit, which is far away from the acoustic piece.
According to the magnetic low-frequency broadband sound absorption and insulation board provided by the invention, the magnetic field intensity of the magnets in the same column is linearly or nonlinearly changed.
According to the magnetic low-frequency broadband sound absorption and insulation plate provided by the invention, the acoustic piece is a film or a thin plate.
According to the magnetic low-frequency broadband sound absorption and insulation plate provided by the invention, the magnetic piece is a magnet piece or an iron piece.
According to the magnetic low-frequency broadband sound absorption and insulation plate provided by the invention, the acoustic piece is connected with the grid in an adhesion manner.
According to the magnetic low-frequency broadband sound absorption and insulation plate provided by the invention, each cavity unit is equal in size.
According to the magnetic low-frequency broadband sound absorption and insulation plate provided by the invention, the thickness of the frame is less than 1cm, and the frame is made of plastics, alloy, wood or glass.
According to the magnetic low-frequency broadband sound absorption and insulation plate provided by the invention, the magnetic field intensity of the magnets in the same row is linearly or nonlinearly changed, so that the sound absorption or sound insulation frequency of each cavity unit is different, the sound insulation or sound absorption bandwidth of the sound absorption and insulation plate is greatly enlarged, the nonlinear adsorption force between the magnets and the magnetic suction piece acts, the structure has a new sound wave action mechanism, namely a magnetic suction coupling resonance mechanism, is not influenced by the thickness of the frame, has ultrathin and ultralow-frequency sound absorption and insulation performance, and can be spliced and assembled between the frames by arranging the connecting component, so that the quick splicing and assembly into a large-size plane or three-dimensional structure is realized, and the magnetic low-frequency sound absorption and insulation plate is conveniently applied to the low-frequency sound wave control and protection engineering of a building structure.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for 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 those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic side sectional view of a magnetic low-frequency broadband sound-absorbing and insulating board provided by the present invention;
FIG. 2 is a schematic top view of the magnetic low-frequency broadband sound-absorbing and insulating board provided by the present invention;
FIG. 3 is a schematic perspective view of a frame according to the present invention;
FIG. 4 is a schematic view of a plane structure assembled by magnetic low-frequency broadband sound-absorbing and insulating boards according to the present invention;
fig. 5 is a schematic view of a three-dimensional structure assembled by magnetic low-frequency broadband sound absorbing and insulating plates according to the present invention.
Reference numerals:
100. a frame; 110. a latch; 120. a card slot; 130. a base plate; 200. a grid; 300. an acoustic member; 400. a magnetic member; 500. a magnet; 600. magnetic low-frequency broadband sound absorption and insulation board.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The magnetic low-frequency broadband sound absorbing and insulating panel of the present invention will be described with reference to fig. 1 to 5.
As shown in fig. 1, 2 and 3, the magnetic low-frequency broadband sound absorption and insulation plate 600 includes a frame 100, a grid 200 and an acoustic member 300, wherein the frame 100 is provided with a connection assembly, the grid 200 is arranged in an area enclosed by the frame 100, and the grid 200 divides the area into a plurality of cavity units. The acoustic member 300 is arranged on one side of the grid 200, and plugs the port of the cavity unit close to one side of the acoustic member 300, the acoustic member 300 is respectively connected with the frame 100 and the grid 200, a plurality of magnetic attraction members 400 are arranged on one side of the acoustic member 300 departing from the grid 200 at intervals, and the magnetic attraction members 400 are in one-to-one correspondence with the cavity units. The port of the cavity unit on the side away from the acoustic member 300 is provided with a magnet 500, and the magnet 500 is connected to the grill 200 by a fixing member.
The magnetic low-frequency broadband sound absorption and insulation board 600 provided by the invention is provided with the connecting components, the frames 100 can be spliced and assembled, the large-size plane or three-dimensional structure can be rapidly spliced and assembled, and the magnetic low-frequency broadband sound absorption and insulation board can be conveniently applied to the low-frequency sound wave control protection engineering of building structures.
According to an embodiment of the present invention, as shown in fig. 3, the connecting assembly includes a latch 110 and a slot 120 disposed at an outer edge of the frame 100, and the latch 110 and the slot 120 are respectively disposed at intervals. When the assembly is needed, the clamping tongue 110 of one frame 100 of the two adjacent frames 100 is clamped into the corresponding clamping groove 120 of the other frame 100, so that the large-size plane or three-dimensional structure can be quickly spliced and assembled, the construction period is shortened, and the working efficiency is improved.
It should be noted that the form of the connecting component is not limited to the latch 110 and the slot 120, and may also include a fastener, a buckle, and the like.
According to an embodiment of the present invention, the fixing member is a bottom plate 130 in this embodiment, the bottom plate 130 is connected to the grid 200, and the bottom plate 130 seals the port of the side of the cavity unit away from the acoustic member 300. The magnet 500 is disposed on the bottom plate 130 at the center of the port of the side of the cavity unit away from the acoustic member 300. Preferably, the base plate 130 is integrally formed with the grid 200, and the magnet 500 is embedded in the base plate 130. The position of the magnet 500 corresponds to the position of the acoustic member 300 one by one, and the acoustic member 300 is located at the center of the port of the cavity unit near one side of the acoustic member 300.
According to an embodiment of the present invention, the fixing member is a supporting frame in this embodiment, the supporting frame is connected to the grid 200, and the magnet 500 is disposed on the supporting frame and is located at the center of the port of the cavity unit on the side away from the acoustic member 300. When the fixing piece is a supporting frame, the port of one side of the cavity unit, which is far away from the acoustic piece 300, is in a hollow state, and the supporting frame can be in various shapes, is a cross-shaped bracket and can also be a rod-shaped structure which is vertically or horizontally arranged.
According to the embodiment of the present invention, the magnetic field strength of the magnets 500 in the same row varies linearly or nonlinearly, and the variation of the magnetic field strength of the magnets 500 causes the variation of the acting force between the magnets 500 and the magnetic attraction member 400. According to the magnetic low-frequency broadband sound absorption and insulation board 600 provided by the invention, the magnetic field strength of the magnets 500 in the same row is linearly or nonlinearly changed, so that the sound absorption or insulation frequency of each cavity unit is different, the sound insulation or sound absorption bandwidth of the sound absorption and insulation board is greatly enlarged, and the nonlinear adsorption force between the magnets 500 and the magnetic suction piece 400 acts, so that the structure has a new sound wave action mechanism, namely a magnetic coupling resonance mechanism, is not influenced by the thickness of the frame 100, and has ultrathin and ultralow-frequency sound absorption and insulation performance.
According to an embodiment of the present invention, the acoustic member 300 is a thin film or a thin plate, and the shape of the acoustic member 300 matches the shape of the area enclosed by the frame 100.
Here, the frame 100 may be a rectangle, a triangle, or a regular polygon, or may have other shapes, and the specific shape of the frame 100 in this embodiment is not particularly limited.
According to the embodiment of the present invention, the magnetic element 400 is a magnet or iron plate, and the magnetic element 400 is connected to the acoustic element 300 by gluing.
According to an embodiment of the present invention, the acoustic member 300 is adhesively attached to the grill 200.
According to an embodiment of the present invention, each cavity cell is equal in size and also identical in shape.
It should be noted that the shape of the cavity unit may be a rectangular parallelepiped, a cylinder, or other states, and the shape of the cavity unit is not specifically limited in this embodiment. The number and arrangement of the cavity units, and the distance between the magnet 500 and the magnetic attraction member 400 are not specifically limited in this embodiment, and can be set according to practical situations. Meanwhile, the magnetizing manner of the magnet 500 is within the scope of the present application as long as the function requirement of the aforementioned sound absorption community is satisfied.
According to the embodiment of the present invention, the thickness of the frame 100 is less than 1cm, and the material of the frame 100 is plastic, alloy, wood or glass.
According to the embodiment of the present invention, the magnetic low-frequency broadband sound absorption and insulation plate 600 includes a frame 100, a grid 200, and an acoustic member 300, wherein the frame 100 is provided with a connection assembly including a latch 110 and a slot 120, which are disposed at the outer edge of the frame 100. When the assembly is needed, the clamping tongue 110 of one frame 100 of the two adjacent frames 100 is clamped into the corresponding clamping groove 120 of the other frame 100, so that the large-size plane or three-dimensional structure can be quickly spliced and assembled, the construction period is shortened, and the working efficiency is improved. The grid 200 is disposed in the region enclosed by the frame 100, the grid 200 divides the region into a plurality of cavity units, the cavity units are arranged in a matrix, the cavity units are cuboid, and each cavity unit has the same size and shape. The acoustic member 300 is a thin film, the acoustic member 300 is disposed on one side of the grill 200, and the acoustic member 300 blocks a port of the cavity unit on the side close to the acoustic member 300. The acoustic member 300 is respectively connected with the frame 100 and the grid 200 through gluing, a plurality of magnetic attraction members 400 are arranged on one side of the acoustic member 300, which is far away from the grid 200, at intervals, and the magnetic attraction members 400 are connected with the acoustic member 300 through gluing. The magnetic members 400 correspond to the cavity units one by one, and the acoustic member 300 is located at the center of the port of the cavity unit near one side of the acoustic member 300. The other side of the grid 200 is provided with a bottom plate 130, the bottom plate 130 is connected with the grid 200, and the bottom plate 130 seals the port of the side of the cavity unit away from the acoustic member 300. The magnets 500 are arranged on the bottom plate 130, and are positioned at the center of the port at the side of the cavity unit far away from the acoustic member 300, and the magnetic field intensity of the magnets 500 in the same column changes linearly or nonlinearly. The base plate 130 is integrally formed with the grid 200, the base plate 130 is used for fixing the magnet 500, and the magnet 500 is embedded in the base plate 130. The position of the magnet 500 corresponds to the position of the acoustic member 300, and the acoustic member 300 is located at the center of the port of the cavity unit near one side of the acoustic member 300.
According to the embodiment of the present invention, in this embodiment, the length and the width of the frame 100 are both 50cm, the grid 200 is disposed in the region surrounded by the frame 100, the grid 200 divides the region into a plurality of cavity units arranged in an array, the length and the width of each cavity unit are both 10cm, the thicknesses of the frame 100 and the grid 200 are both 6mm, and the thickness of the bottom plate 130 is 3 mm. The acoustic piece 300 is a PET film with a thickness of 0.2mm, the magnetic piece 400 is a circular iron sheet adhered to the acoustic piece 300 through glue, the diameter of the circular iron sheet is 3cm, and the thickness of the circular iron sheet is 0.3 mm. The acoustic piece 300 is adhesively bonded to the frame 100 and the grid 200, respectively, and the magnet 500 is a magnet piece having a thickness of 2mm and a diameter of 3 cm. The magnetic field intensity of the magnets 500 in the same row changes from 5000Gs to 1000Gs in sequence, so the non-linear acting force between the magnets 500 in the same row and the magnetic attraction piece 400 is decreased gradually in sequence. The magnetic field change of the magnet 500 makes the sound absorption or sound insulation frequency of each cavity unit different, the sound insulation or sound absorption bandwidth of the sound absorption and insulation board is greatly enlarged, and the nonlinear adsorption force between the magnet 500 and the magnetic part 400 acts, so that the structure has a new sound wave action mechanism, namely a magnetic coupling resonance mechanism, is not influenced by the thickness of the frame 100, and has ultra-thin and ultra-low frequency sound absorption and insulation performance.
Because the frame 100 is provided with the connecting assembly, the frame 100 and the frame 100 can be spliced and assembled, the large-size plane or three-dimensional structure can be quickly spliced and assembled, and the quick splicing and assembling method is conveniently applied to the low-frequency sound wave control protection engineering of a building structure. As shown in fig. 4, a plurality of magnetic low-frequency broadband sound absorbing and insulating plates 600 may be assembled into a planar structure, wherein one planar structure is formed by assembling a plurality of rectangular magnetic low-frequency broadband sound absorbing and insulating plates 600, and the other planar structure is formed by assembling triangular magnetic low-frequency broadband sound absorbing and insulating plates 600. As shown in fig. 5, a plurality of magnetic low-frequency broadband acoustic absorption and insulation plates 600 are assembled into a rectangular parallelepiped structure, wherein each magnetic low-frequency broadband acoustic absorption and insulation plate 600 is rectangular.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a magnetic force low frequency broadband sound absorption and insulation board which characterized in that includes:
a frame provided with a connection assembly;
the grid is arranged in an area enclosed by the frame, and the grid divides the area into a plurality of cavity units;
the acoustic piece is arranged on one side of the grid and plugs a port of the cavity unit close to one side of the acoustic piece, the acoustic piece is respectively connected with the frame and the grid, a plurality of magnetic suction pieces are arranged on one side of the acoustic piece away from the grid at intervals, and the magnetic suction pieces are in one-to-one correspondence with the cavity units; and a magnet is arranged at a port of one side of the cavity unit, which is far away from the acoustic piece, and the magnet is connected with the grid through a fixing piece.
2. The magnetic low-frequency broadband sound absorbing and insulating board as claimed in claim 1, wherein the connecting assembly comprises a latch and a slot arranged at the outer edge of the frame.
3. The magnetic low-frequency broadband sound absorbing and insulating board as claimed in claim 2, wherein the fixing member is a bottom board, the bottom board is connected with the grid and seals the port of the cavity unit on the side away from the acoustic member; the magnet is arranged on the bottom plate and is positioned in the center of the port on the side, away from the acoustic piece, of the cavity unit.
4. The magnetic low-frequency broadband sound absorbing and insulating board according to claim 2, wherein the fixing member is a support frame, the support frame is connected with the grid, and the magnet is disposed on the support frame and is located in the center of the port on the side of the cavity unit away from the acoustic member.
5. The magnetic low-frequency broadband sound absorbing and insulating board as claimed in any one of claims 1 to 4, wherein the magnetic field strength of the magnets in the same row varies linearly or nonlinearly.
6. The magnetic low-frequency broadband sound absorbing and insulating panel according to any one of claims 1 to 4, wherein the acoustic member is a film or a thin plate.
7. The magnetic low-frequency broadband sound absorbing and insulating board as claimed in any one of claims 1 to 4, wherein the magnetic absorbing member is a magnet piece or an iron piece.
8. The magnetic low frequency broadband sound absorbing and insulating panel according to claim 7, wherein said acoustic member is adhesively attached to said grill.
9. The magnetic low-frequency broadband sound absorbing and insulating panel according to claim 7, wherein each of the cavity units is equal in size.
10. The magnetic low-frequency broadband sound absorbing and insulating board according to any one of claims 1 to 4, wherein the thickness of the frame is less than 1cm, and the frame is made of plastic, alloy, wood or glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110695091.5A CN113257216A (en) | 2021-06-23 | 2021-06-23 | Magnetic low-frequency broadband sound absorption and insulation board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110695091.5A CN113257216A (en) | 2021-06-23 | 2021-06-23 | Magnetic low-frequency broadband sound absorption and insulation board |
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| Publication Number | Publication Date |
|---|---|
| CN113257216A true CN113257216A (en) | 2021-08-13 |
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| CN202110695091.5A Pending CN113257216A (en) | 2021-06-23 | 2021-06-23 | Magnetic low-frequency broadband sound absorption and insulation board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230203805A1 (en) * | 2021-12-27 | 2023-06-29 | Calum W. Smeaton | Apparatus with Interchangeable Panels for Varying Acoustic and Esthetic Treatments or Effects |
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| CN105551478A (en) * | 2016-01-29 | 2016-05-04 | 北京市劳动保护科学研究所 | Device and method of magnetic force negative stiffness multi-frequency sound absorption |
| CN107274880A (en) * | 2017-07-04 | 2017-10-20 | 北京市劳动保护科学研究所 | A kind of non-linear magnetic force negative stiffness Active Absorption device |
| JP2019094723A (en) * | 2017-11-27 | 2019-06-20 | 株式会社ブルアンドベア | Sound absorption panel |
| CN112820264A (en) * | 2021-01-07 | 2021-05-18 | 深圳市航天新材科技有限公司 | Assembled type acoustic ultrastructure and sound baffle |
-
2021
- 2021-06-23 CN CN202110695091.5A patent/CN113257216A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105551478A (en) * | 2016-01-29 | 2016-05-04 | 北京市劳动保护科学研究所 | Device and method of magnetic force negative stiffness multi-frequency sound absorption |
| CN107274880A (en) * | 2017-07-04 | 2017-10-20 | 北京市劳动保护科学研究所 | A kind of non-linear magnetic force negative stiffness Active Absorption device |
| JP2019094723A (en) * | 2017-11-27 | 2019-06-20 | 株式会社ブルアンドベア | Sound absorption panel |
| CN112820264A (en) * | 2021-01-07 | 2021-05-18 | 深圳市航天新材科技有限公司 | Assembled type acoustic ultrastructure and sound baffle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20230203805A1 (en) * | 2021-12-27 | 2023-06-29 | Calum W. Smeaton | Apparatus with Interchangeable Panels for Varying Acoustic and Esthetic Treatments or Effects |
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