CN212541902U - Adjustable acoustic metamaterial structure - Google Patents
Adjustable acoustic metamaterial structure Download PDFInfo
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- CN212541902U CN212541902U CN202020705911.5U CN202020705911U CN212541902U CN 212541902 U CN212541902 U CN 212541902U CN 202020705911 U CN202020705911 U CN 202020705911U CN 212541902 U CN212541902 U CN 212541902U
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Abstract
The utility model provides an adjustable acoustics super structure material structure relates to super structure material technical field, including the wavelength tube bank body and with the resonance cavity bank body that the wavelength tube bank body bonded, the wavelength tube bank body is equipped with first cavity and second cavity respectively with the resonance cavity bank body in vertical direction, the resonance cavity bank body can with rear space UNICOM, form a structural sound absorption material cell body that can realize more than 50% acoustic absorptivity in 300 to 4000Hz frequency channel, the bottom of wavelength tube bank body and resonance cavity bank body all is on same horizontal plane, the top all is equipped with the backplate end cap. The utility model discloses the acoustic absorption coefficient scope is big, can save space, increase of service life, pollution abatement.
Description
Technical Field
The utility model belongs to the technical field of the super material of constructing, concretely relates to adjustable acoustics super material structure of constructing.
Background
The metamaterial generally refers to a novel multifunctional material which is not completely the same as the natural, common or common base material in characteristics, has certain innovation in functionality, or has great improvement on the original function, is artificially designed or naturally produced; the super-structure material is a novel multifunctional material which is designed manually or naturally and completely depends on a structure body designed based on different physical principles and does not depend on the material properties of the structure body; the acoustic metamaterial is an acoustic material which is completely formed by a structure designed based on different physical principles and has special acoustic functionality.
The quarter-wave tube is one of the most used and important parts of the air inlet and exhaust system of the automobile. In the air intake system, the quarter wave tube may be a separate component that eliminates frequencies in a certain medium to high frequency range. In exhaust systems, quarter-wave tubes are not typically used alone, but together with a diverging muffler, make up a multi-tube labyrinth muffler. The main factors influencing the noise elimination effect of the quarter-wave tube are as follows: (1) the length of the wave length tube; (2) the ratio of the cross-sectional area of the wavelength tube to the cross-sectional area of the main tube; the larger the ratio of the waveguide tube to the main tube cross-sectional area, the larger the amplitude of the transmission loss and the wider the bandwidth to be eliminated.
Helmholtz resonance cavity: before the electro-acoustic technology became mature, the resonance phenomenon was used to analyze the composition of composite sounds or to set the sounds in musical instruments using a set of brass spherical headband made by the german physicist helmholtz, each ball having a tube with two openings. The large tube receives external sound source, when the frequency of sound source is identical to the natural frequency of ball body, it can produce resonance, and the small tube can be inserted into the ear of musician to listen to the identified sound.
The existing industrial scale production of the acoustic super-structure material generally adopts a plastic forming technology, such as injection molding, die casting, blow molding and other processes, once the material is processed and formed, the performance is fixed, and the sound absorption frequency band cannot be adjusted according to actual needs.
Therefore, it is urgently needed to provide an adjustable acoustic super-structure material structure which has a large sound absorption coefficient range, can save space, prolong the service life and reduce pollution.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an adjustable acoustics super structure material structure to the not enough of current super structure material structure.
The utility model provides a following technical scheme:
the utility model provides an adjustable acoustics metamaterial structure unit, including the wavelength bank of tubes body and with the resonance cavity row body that the wavelength bank of tubes body bonded, the wavelength bank of tubes body with the resonance cavity row body is equipped with first cavity and second cavity respectively in vertical direction, the wavelength bank of tubes body with the top of resonance cavity row body all is on same horizontal plane, and the bottom all is equipped with the backplate end cap.
Preferably, the wavelength tube bank body includes first bank body and second bank body, first bank body with the structure of second bank body is the same, the one end lateral wall of first bank body with the one end lateral wall of second bank body is connected.
Preferably, the resonance cavity array comprises a third array, a fourth array, a fifth array, a sixth array, a seventh array, an eighth array, a ninth array and a tenth array which are connected with each other, and one end side wall of the third array is connected with one end side wall of the second array.
Preferably, the heights of the second row, the third row, the fourth row, the fifth row, the sixth row, the seventh row, the eighth row, the ninth row and the tenth row in the vertical direction are sequentially reduced.
Further, the first row body, the second row body, the third row body, the fourth row body, the fifth row body, the sixth row body, the seventh row body, the eighth row body, the ninth row body and the tenth row body are welded by ultrasonic waves.
Further, the first row, the second row, the third row, the fourth row, the fifth row, the sixth row, the seventh row, the eighth row, the ninth row and the tenth row are all connected by an epoxy adhesive layer.
Preferably, the back plate plug comprises a connecting strip, at least one plug block is arranged on the upper surface of the connecting strip, the distance between every two adjacent plug blocks is equal, and a brace is arranged at one end of the lower surface of the connecting strip.
Preferably, the number of the first cavity and the second cavity is at least one, the cross sections of the first cavity and the second cavity are the same, the open ends of the first cavity and the second cavity are respectively in one-to-one correspondence with the positions of the blocking blocks, and the outer side wall of each blocking block is connected with the inner side wall of the first cavity or the second cavity.
Preferably, the frequency range of the resonance cavity array body is 300-4000 Hz.
The utility model has the advantages that:
(1) compared with the traditional acoustic material, the acoustic super-structure material has higher low-frequency sound absorption performance (below 1000 Hz), higher low-frequency sound absorption coefficient and lower sound absorption frequency threshold under the same material thickness;
(2) under the same low-frequency sound absorption frequency band, the required installation space is smaller, and when the material is arranged, a cavity structure is not required to be additionally arranged, so that the space is saved;
(3) the material with high environmental durability is used for manufacturing the sound absorption product, so that the service life is prolonged, and the pollution is reduced;
(4) the sound absorption effect of the unit body can be adjusted by adjusting the back plate plugs;
(5) the sound absorption effect of the unit plate can be adjusted through the unit body arrangement and combination mode.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a left side view of the present invention;
fig. 3 is a schematic structural diagram of the middle back plate plug of the present invention;
FIG. 4 is a schematic structural diagram of a first combined application mode of the present invention;
FIG. 5 is a schematic structural diagram of a second combined application mode of the present invention;
fig. 6 is a schematic structural diagram of a third combined application mode of the present invention.
Labeled as: 1. a first cavity; 2. a second cavity; 3. bracing; 4. a unit body; 5. a back plate plug; 6. a first row body; 7. a second row of bodies; 8. a third row of bodies; 9. a fourth bank; 10. a fifth row of bodies; 11. a sixth row of bodies; 12. A seventh row; 13. an eighth row of bodies; 14. a ninth row of bodies; 15. a tenth row body; 16. a connecting strip; 17. and (7) blocking.
Detailed Description
As shown in the figure, an adjustable acoustics metamaterial structure unit, including the wavelength bank of tubes body and with the resonance chamber bank of tubes body bonding, the wavelength bank of tubes body and resonance chamber bank of tubes body are equipped with first cavity 1 and second cavity 2 respectively in vertical direction, resonance chamber bank of tubes body can with rear space UNICOM, form one and can realize the structural sound absorbing material unit body 4 of more than 50% acoustic absorption coefficient in 300 to 4000Hz frequency channel, the top of the wavelength bank of tubes body and resonance chamber bank of tubes body all is on same horizontal plane, the bottom all is equipped with backplate end cap 5.
The wave tube row body includes the first row body 6 and the second row body 7, and the first row body 6 is the same with the structure of the second row body 7, and the one end lateral wall of the first row body 6 is connected with the one end lateral wall of the second row body 7. The resonance cavity array body comprises a third array body 8, a fourth array body 9, a fifth array body 10, a sixth array body 11, a seventh array body 12, an eighth array body 13, a ninth array body 14 and a tenth array body 15 which are mutually connected, and one end side wall of the third array body 8 is connected with one end side wall of the second array body 7. The heights of the second row 7, the third row 8, the fourth row 9, the fifth row 10, the sixth row 11, the seventh row 12, the eighth row 13, the ninth row 14 and the tenth row 15 in the vertical direction are sequentially reduced.
The first row 6, the second row 7, the third row 8, the fourth row 9, the fifth row 10, the sixth row 11, the seventh row 12, the eighth row 13, the ninth row 14 and the tenth row 15 are connected by ultrasonic welding or by epoxy resin adhesive layers.
The back plate plug 5 comprises a connecting strip 16, at least one plug block 17 is arranged on the upper surface of the connecting strip 16, the distance between every two adjacent plug blocks 17 is equal, and a brace 3 is arranged at one end of the lower surface of the connecting strip 16. The number of the first cavities 1 and the second cavities 2 is at least one, the cross sections of the first cavities 1 and the second cavities 2 are the same, the open ends of the first cavities 1 and the second cavities 2 are respectively in one-to-one correspondence with the positions of the blocking blocks 17, and the outer side wall of each blocking block 17 is connected with the inner side wall of each first cavity 1 or each second cavity 2.
The utility model discloses a use-way does: the ninth row 14 and the tenth row 15 comprise quarter wave tubes corresponding to the number of the first cavities 1, and any one of the third row 8, the fourth row 9, the fifth row 10, the sixth row 11, the seventh row 12, the eighth row 13, the ninth row 14 and the tenth row 15 can be communicated with the rear space, and a structural sound absorption material unit 4 capable of realizing more than 50% of sound absorption coefficient in the 4000Hz frequency band of 300-charge materials is formed by utilizing the rear cavity. According to a certain rule, as shown in fig. 2-4, a plurality of structural units are arranged and combined into a sound absorption material unit plate by ultrasonic welding or epoxy resin adhesive bonding, and the back plate plugs 5 are adjusted to further muffle sounds with different frequencies.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides an adjustable acoustics metamaterial structure, its characterized in that, including the wavelength tube bank body and with the resonance cavity bank body that the wavelength tube bank body bonded, the wavelength tube bank body with resonance cavity bank body is equipped with first cavity and second cavity respectively in vertical direction, the wavelength tube bank body with the top of resonance cavity bank body all is on same horizontal plane, and the bottom all is equipped with the backplate end cap.
2. The tunable acoustic metamaterial structure of claim 1, wherein the wavelength tube array includes a first array and a second array, the first array and the second array are identical in structure, and one end outer sidewall of the first array is connected with one end outer sidewall of the second array.
3. The tunable acoustic metamaterial structure of claim 2, wherein the array of resonant cavities includes a third array, a fourth array, a fifth array, a sixth array, a seventh array, an eighth array, a ninth array, and a tenth array connected to each other, and one end sidewall of the third array is connected to one end sidewall of the second array.
4. The tunable acoustic metamaterial structure of claim 3, wherein the second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth rows sequentially decrease in height in a vertical direction.
5. The tunable acoustic metamaterial structure of claim 4, wherein the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth rows are ultrasonically welded.
6. The tunable acoustic metamaterial structure of claim 4, wherein the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth rows are connected by an epoxy glue layer.
7. The tunable acoustic metamaterial structure of claim 1, wherein the back plate plugs comprise connecting strips, the upper surfaces of the connecting strips are provided with at least one block, the distance between adjacent blocks is equal, and one end of the lower surface of each connecting strip is provided with a brace.
8. The structure of claim 7, wherein the number of the first cavity and the second cavity is at least one, the cross sections of the first cavity and the second cavity are the same, the open ends of the first cavity and the second cavity are respectively in one-to-one correspondence with the positions of the blocking blocks, and the outer side wall of each blocking block is connected with the inner side wall of the first cavity or the second cavity.
9. The tunable acoustic metamaterial structure of claim 1, wherein the resonant cavity array is used in a frequency band of 300-4000 Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020705911.5U CN212541902U (en) | 2020-04-30 | 2020-04-30 | Adjustable acoustic metamaterial structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020705911.5U CN212541902U (en) | 2020-04-30 | 2020-04-30 | Adjustable acoustic metamaterial structure |
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| CN212541902U true CN212541902U (en) | 2021-02-12 |
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| CN202020705911.5U Active CN212541902U (en) | 2020-04-30 | 2020-04-30 | Adjustable acoustic metamaterial structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112435647A (en) * | 2020-04-30 | 2021-03-02 | 南京光声超构材料研究院有限公司 | Sound absorption unit and sound absorption device |
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- 2020-04-30 CN CN202020705911.5U patent/CN212541902U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112435647A (en) * | 2020-04-30 | 2021-03-02 | 南京光声超构材料研究院有限公司 | Sound absorption unit and sound absorption device |
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