CN117211427A - Broad-width silencing device for building and noise reduction plate - Google Patents
Broad-width silencing device for building and noise reduction plate Download PDFInfo
- Publication number
- CN117211427A CN117211427A CN202311481815.1A CN202311481815A CN117211427A CN 117211427 A CN117211427 A CN 117211427A CN 202311481815 A CN202311481815 A CN 202311481815A CN 117211427 A CN117211427 A CN 117211427A
- Authority
- CN
- China
- Prior art keywords
- cavity
- sound absorption
- sound
- wide
- building
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Building Environments (AREA)
Abstract
The application discloses a wide muffler device and a noise reduction plate for a building, wherein the sound absorption structure comprises: the sound absorption cavity is provided with a cavity with an upward opening; the cover plate is positioned above the sound absorption cavity and covers the opening of the cavity of the sound absorption cavity; at least one baffle plate, one end of each baffle plate is arranged on the cover plate, the other end of each baffle plate extends downwards and is positioned in the cavity, and the at least one baffle plate sequentially divides the cavity into at least two first cavities which are communicated with each other; wherein, be provided with the through-hole on the apron, the pore wall of through-hole forms the pipe portion from the lower surface downwardly extending of apron, has the runner of being connected with the through-hole in the pipe portion, and the cavity of sound absorption cavity passes through the outside intercommunication of runner and sound absorption cavity. The application adjusts the frequency range of sound absorption by controlling the number of the first cavities in the sound absorption cavity, thereby realizing the sound absorption effect of a certain frequency range.
Description
Technical Field
The application belongs to the technical field of acoustics, and particularly relates to a wide-range silencing device and a noise reduction plate for a building.
Background
With the development of technology, the speed of a large number of electromechanical devices, automobiles, high-speed rails, airplanes and the like is greatly improved, and noise pollution is a focus of attention. Noise pollution becomes a technical problem to be solved in the prior art. Low frequency noise within 1000Hz is a major difficulty in noise control, and conventional noise reducing materials, such as foam boards, fiber materials, rubber and plastic boards, slag wool, micro-perforated boards, and the like, tend to have low sound absorption coefficients in terms of low frequency sound absorption performance, and tend to be relatively heavy in order to achieve effective noise reduction. The acoustic metamaterial serving as an artificial structure composite material has the advantages of light weight and acoustic performance, and has potential engineering application prospects in the fields of anechoic rooms, silent rooms, studio, factory building industry noise reduction, automobiles and the like.
Disclosure of Invention
The application aims to provide a wide-range noise elimination device and a noise reduction plate for a building, which can effectively solve the technical problems.
The technical scheme for solving the technical problems is as follows:
a wide format muffler device for a building, comprising:
the sound absorption cavity is provided with a cavity with an upward opening;
the cover plate is positioned above the sound absorption cavity and covers the opening of the cavity of the sound absorption cavity;
at least one baffle, one end of each baffle is arranged on the cover plate, the other end of each baffle extends downwards and is positioned in the cavity, and at least one baffle sequentially separates the cavity into at least two communicated first cavities;
the cover plate is provided with a through hole, the hole wall of the through hole downwards extends from the lower surface of the cover plate to form a pipe part, a flow passage connected with the through hole is arranged in the pipe part, and the cavity of the sound absorption cavity is communicated with the outside of the sound absorption cavity through the flow passage.
As a further development of the application, the tube portion is located in a first of the first cavities.
As a further development of the application, the dimensions of each of the first cavities are identical.
As a further improvement of the application, each of the separators has the same height L2.
As a further development of the application, the tube portion has a first length L1, the partition has a height L2, the first length L1 being smaller than the height L2.
As a further improvement of the present application, the value range of the first length L1 of the pipe portion is: l1 is more than or equal to 3mm and less than or equal to 29mm.
As a further improvement of the present application, the cross-sectional shape of the flow passage along the vertical direction is a circle or a polygon.
The application also discloses a noise reduction plate, which is provided with a first side surface and a second side surface which are oppositely arranged, and comprises a plurality of wide noise reduction devices for buildings, wherein the wide noise reduction devices for the buildings comprise:
at least one of the wide-amplitude muffler devices for a building is a first sound absorbing structure having one of the partitions, and;
at least one of the wide-amplitude muffler devices for a building is a second sound absorbing structure having two of the baffles, and/or;
at least one of the wide-width muffler devices for a building is a third sound absorbing structure having three of the partitions, and/or;
at least one of the wide-amplitude muffler devices for a building is a fourth sound absorbing structure having four of the partitions, and/or;
at least one of the wide-amplitude muffler devices for a building is a fifth sound absorbing structure having five of the partitions, and/or;
at least one of the wide-amplitude muffler devices for a building is a sixth sound absorbing structure having six of the partitions;
wherein each of the through holes is located on the first side.
As a further improvement of the present application, in at least two of the first sound absorption structure or the second sound absorption structure or the third sound absorption structure or the fourth sound absorption structure or the fifth sound absorption structure or the sixth sound absorption structure, the values of the first lengths L1 of at least two of the pipe portions are different in the up-down direction.
As a further improvement of the present application, a single sound absorbing structure is also included;
the single sound absorbing structure includes: the second sound absorption cavity is provided with a second cavity with an upward opening; the second cover plate is positioned above the second sound absorption cavity and covers the opening of the second cavity of the second sound absorption cavity; the second cover plate is provided with a second through hole, the hole wall of the second through hole downwards extends from the lower surface of the second cover plate to form a second pipe part, a second flow passage connected with the second through hole is arranged in the second pipe part, and a second cavity of the second sound absorption cavity is communicated with the outside of the second sound absorption cavity through the second flow passage;
wherein each through hole and each second through hole are positioned on the first side surface.
As a further development of the application, each of the first and second cavities has the same dimensions.
The application has the beneficial effects that:
compared with the prior art, the wide silencing device for the building has the advantages that the number of the first cavities in the sound absorption cavity is controlled to adjust the sound absorption frequency range, so that the sound absorption effect on a certain frequency range is achieved.
The application also discloses a noise reduction plate formed by arranging a plurality of wide noise reduction devices for the building, which can realize the effect of absorbing sound in a certain frequency band or the whole frequency band within the frequency range of 280Hz-1050 Hz.
Drawings
The application will be further described with reference to the following drawings and examples, in which:
FIG. 1 is a schematic view of a noise reduction plate according to the present disclosure;
FIG. 2 is a schematic view of the structure of the single sound absorbing structure shown in FIG. 1;
FIG. 3 is a schematic view of the first sound absorbing structure shown in FIG. 1;
FIG. 4 is a cross-sectional view taken along line E-E of FIG. 3;
FIG. 5 is a schematic view of the second sound absorbing structure shown in FIG. 1;
FIG. 6 is a schematic structural view of the third sound absorbing structure shown in FIG. 1;
FIG. 7 is a schematic view of the fourth sound absorbing structure shown in FIG. 1;
FIG. 8 is a schematic structural view of the fifth sound absorbing structure shown in FIG. 1;
fig. 9 is a schematic structural view of the sixth sound absorbing structure shown in fig. 1.
Reference numerals:
100-noise reduction plates; 10-a single sound absorbing structure; 11-a second sound absorption cavity; 111-a second cavity; 12-a second cover plate; 13-a second tube portion; 131-a second through hole; 132-a second flow channel; 20-a first sound absorbing structure; 21-an acoustic absorption cavity; 211-cavity a;2111—a first cavity a; 22-cover plate; 23-separator a; 24-tube part a; 241-through holes; 242-flow channel; 30-a second sound absorbing structure; 31-cavity B; 311-a first cavity B; 312-a second first cavity B; 313-a third first cavity B; 32-a separator B; 33-tube part B; 40-a third sound absorbing structure; 41-cavity C; 411-a first cavity C; 412-a second first cavity C; 413-a third first cavity C; 414-fourth first cavity C; 42-separator C; 43-tube part C; 50-fourth sound absorbing structure; 51-cavity D; 511-a first cavity D; 512-a second first cavity D; 513-a third first cavity D; 514-fourth first cavity D; 515-a fifth first cavity D; 52-separator D; 53-tube portion D; 60-a fifth sound absorbing structure; 61-cavity E; 611-a first cavity E; 612-a second first cavity E; 613-a third first cavity E; 614-fourth first cavity E; 615-a fifth first cavity E; 616-sixth first cavity E; 62-separator E; 63-tube section E; 70-a sixth sound absorbing structure; 71-cavity F; 711-a first cavity F; 712-a second first cavity F; 713-a third first cavity F; 714-fourth first cavity F; 715-a fifth first cavity F; 716-sixth first cavity F; 717-seventh first cavity F; 72-separator F; 73-tube portion F.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
In order to illustrate the technical scheme of the application, the following description is made by specific examples.
Referring to fig. 1 to 9, a noise reduction plate 100 according to the present application is disclosed, which comprises a plurality of wide muffler devices for a building, wherein the plurality of wide muffler devices for a building comprises eight single sound absorption structures 10, fifteen first sound absorption structures 20, one second sound absorption structure 30, six third sound absorption structures 40, four fourth sound absorption structures 50, four fifth sound absorption structures 60 and one sixth sound absorption structure 70. In the present application, the pipe portions of the plurality of wide muffler devices for a building may be pipe portions a, B, C, D, E, F; the plurality of cavities for the wide muffler devices of the building can be a cavity A, a cavity B, a cavity C, a cavity D, a cavity E and a cavity F, and the plurality of separators for the wide muffler devices of the building can be a separator A, a separator B, a separator C, a separator D, a separator E and a separator F.
In this embodiment, eight single sound absorbing structures 10 may be arranged to form a single sound absorbing device. As shown in fig. 2, each of the single sound absorbing structures 10 includes a second sound absorbing cavity 11, and the second sound absorbing cavity 11 has a second cavity 111 that is opened upward; a second cover plate 12 located above the second sound-absorbing cavity 11 and covering the opening of the second cavity 111 of the second sound-absorbing cavity 11; the second cover plate 12 is provided with a second through hole 131, the hole wall of the second through hole 131 extends downwards from the lower surface of the second cover plate 12 to form a second pipe portion 13, a second flow channel 132 connected with the second through hole 131 is arranged in the second pipe portion 13, so that the second cavity 111 of the second sound absorption cavity 11 is communicated with the outside of the second sound absorption cavity 11 through the second flow channel 132, and air enters the second cavity 111 from the second through hole 131, and the second pipe portion 13 extends to be arranged in the second cavity 111, so that the sound absorption effect of the single sound absorption structure 10 can be achieved. In the present application, each of the second through holes 131 is located at the same side of the sound absorbing device.
In particular, the single sound absorbing structure 10 is preferably a square-shaped cavity in cross section perpendicular to the up-down direction (i.e., the sound absorbing direction described below). And for more convenient determination of the sound absorption coefficient of the single sound absorption structure 10, the present application enumerates eight specific parameters for each of the single sound absorption structures 10:
wherein, each single sound absorption structure 10 is 37mm along the thickness of sound absorption direction, each second cavity 111 is also 13x13mm along the cross-sectional area of perpendicular to the up-down direction, the wall thickness of each second sound absorption cavity 11 is 1mm, and the thickness of each second cover plate 12 is 1mm. Wherein the diameter of the second through hole 131 in each single sound absorbing structure 10 is 8mm, each second pipe portion 13 has a second length L3 in the up-down direction, which is 13mm, 17mm, 19mm, 21mm, 23mm, 25mm, 27mm, 29mm, respectively, and the thickness of each second pipe portion 13 is 1mm. Through the above data simulation, the sound absorption coefficient of the sound absorption device formed by the eight single sound absorption structures 10 is measured, the average value of sound absorption coefficients in the frequency range of 875Hz-1050Hz is better, and the sound absorption performance is excellent in the frequency range. However, in this embodiment, a plurality of single sound absorbing structures 10 with different second lengths L3 may be arranged to form a new sound absorbing device, so that the average value of the sound absorbing coefficients in the longer frequency range may be better.
Specifically, each of the single sound absorbing structures 10 may have a circular or polygonal cross section (except square) along a vertical direction, or the second cavity 111 may have a circular or polygonal cross section along a vertical direction, or the second through hole 131 may have a circular or square hole, which is not limited in this application.
In this embodiment, fifteen first sound absorbing structures 20 may be arranged to form a sound absorbing device, as shown in fig. 3 and 4, where each first sound absorbing structure 20 includes a sound absorbing cavity 21 with an upwardly open cavity a211; a cover plate 22 which is positioned above the sound absorption cavity 21 and covers the opening of the cavity A211 of the sound absorption cavity 21; one end of a partition plate a23 is disposed on the cover plate 22, and the other end extends downward and is located in the cavity a211, and the partition plate a23 divides the cavity a211 into two communicating first cavities a2111. In the application, the cover plate is provided with the through hole 241, the hole wall of the through hole 241 extends downwards from the lower surface of the cover plate 22 to form the pipe part A24, the pipe part A24 is internally provided with the runner 242 connected with the through hole 241, so that the two first cavities A2111 of the sound absorption cavity 21 are communicated with the outside of the sound absorption cavity 21 through the runner 242, air enters the two first cavities A2111 from the through hole 241, and the pipe part A24 extends to be arranged in the first cavities A2111, thereby achieving the effect of sound absorption of the first sound absorption structure 20. In the present application, each through hole 241 is located at the same side of the sound absorbing device.
Specifically, the first sound absorbing structure 20 is preferably a square-shaped cavity in a cross section perpendicular to the up-down direction. And for more convenient determination of the sound absorption coefficient of the first sound absorption structure 20, the present application enumerates fifteen specific parameters for each of the first sound absorption structures 20:
wherein, every first sound absorbing structure 20 is 37mm along the sound absorption direction thickness, and every first cavity A2111 is also 13x13mm by the cross sectional area along the vertical direction, and every sound absorbing cavity 21's wall thickness is 1mm, and every apron 22's thickness is 1mm, and every baffle A23 has along the height L2 of upper and lower direction and is 30mm, and baffle A23's thickness is 1mm. Wherein the diameter of the through hole 241 in each of the first sound absorbing structures 20 is 8mm, and each of the pipe portions a24 has a first length L1 in the up-down direction of 3mm, 5mm, 7mm, 13mm, 17mm, 19mm, 21mm, 23mm, 25mm, 27mm, 29mm, respectively; 9mm, 11mm, 13mm, 15mm, 17mm, 19mm, 21mm, 23mm, 25mm, 27mm, 29mm, each tube portion A24 having a thickness of 1mm. Through the data simulation, the sound absorption coefficient of the sound absorption device formed by the fifteen first sound absorption structures 20 is measured, the average value of the sound absorption coefficients in the frequency range of 570Hz-870Hz is good, and the sound absorption device has excellent sound absorption performance in the frequency range. In the present application, each of the first sound absorbing structures 20 is a cavity having a circular or polygonal cross section (excluding square) along a vertical direction, or the first cavity a2111 is formed by a circular or polygonal cross section along a vertical direction, or the through hole 241 is a circular hole or a square hole, which is not limited thereto.
In this embodiment, a second sound absorbing structure 30 may also be a sound absorbing device, as shown in fig. 5, the second sound absorbing structure 30 is substantially the same as the first sound absorbing structure 20, except that the second sound absorbing structure 30 has two partition plates B32, the two partition plates B32 divide the cavity B31 into a first cavity B311, a second first cavity B312 and a third first cavity B313 which are communicated in sequence, and the pipe portion B33 is located in the first cavity B311.
Specifically, the second sound absorbing structure 30 is preferably a square cavity in a cross section perpendicular to the up-down direction. And the present application, for more convenient determination of the sound absorption coefficient of the single sound absorption structure 10, enumerates each specific parameter of the second sound absorption structure 30 as follows:
the thickness of the second sound absorption structure 30 along the sound absorption direction is 37mm, the thickness of the wall body of the sound absorption cavity is 1mm, the thickness of the cover plate is 1mm, and the sectional area of each first cavity B311, 312 and 313 along the vertical direction is 13x13mm. Wherein the through holes in the second sound absorbing structure 30 are each 8mm in diameter, the pipe portions B33 in the second sound absorbing structure 30 have a first length L1 of 12.5mm, and each pipe portion B33 has a thickness of 1mm. Through the data simulation, the sound absorption coefficient of the sound absorption device formed by the second sound absorption structure 30 is measured, the average value of the sound absorption coefficients in the frequency range of 550Hz-570Hz is good, and the sound absorption device has excellent sound absorption performance in the frequency range. In the application, a plurality of second sound absorption structures 30 with different first lengths L1 can be arranged to form a new sound absorption device, so that the average value of sound absorption coefficients in a longer frequency range is better.
In this embodiment, six third sound absorbing structures 40 may be arranged to form a sound absorbing device, as shown in fig. 6, the third sound absorbing structure 40 is substantially the same as the first sound absorbing structure 20, except that the third sound absorbing structure 40 has three partitions C42, and the three partitions C42 divide the cavity C41 into a first cavity C411, a second first cavity C412, a third first cavity C413 and a fourth first cavity C414, which are communicated in sequence; the tube portion C43 is located in the first cavity C411. In the present application, each through hole is located on the same side of the sound absorbing device.
In particular, the third sound absorbing structure 40 is preferably a square cavity in a cross section perpendicular to the up-down direction (and the present application provides for more convenient determination of the sound absorption coefficient of the third sound absorbing structure 40, each specific parameter of the six third sound absorbing structures 40 being listed below:
the thickness of each third sound absorption structure 40 along the sound absorption direction is 37mm, the cross section area of each first cavity C411, 412, 413, 414 along the vertical direction is 13x13mm, the thickness of the wall body of each sound absorption cavity is 1mm, and the thickness of each cover plate is 1mm. Wherein the diameter of the through holes in one third sound absorption structure 40 is 8.5mm, the pipe portions C43 in the third sound absorption structure 40 have a first length L1 of 29mm, the diameter of the through holes in the other five third sound absorption structures 40 are 8mm, the pipe portions C43 in the other five third sound absorption structures 40 have a first length L1 of 1mm, 5mm, 9mm, 13mm, 17mm, respectively, and the thickness of each pipe portion C43 is 1mm. Through the data simulation, the sound absorption coefficient of the sound absorption device formed by the six single sound absorption structures 10 is measured, the average value of the sound absorption coefficients in the frequency range of 450Hz-540Hz is good, and the sound absorption device has excellent sound absorption performance in the frequency range.
In the present application, there are two types of through holes of the third sound absorbing structure 40 having different diameters, and the frequency ranges in which sound absorption is good are achieved with a small difference, and the present application will not be described in detail. However, in this embodiment, the third sound absorbing structures 40 with different diameters of the two types of through holes may be arranged to form a new sound absorbing device, so that the average value of the sound absorbing coefficients in the longer frequency range may be better.
In this embodiment, four fourth sound absorbing structures 50 may be arranged to form a sound absorbing device, as shown in fig. 7, the fourth sound absorbing structure 50 is substantially the same as the first sound absorbing structure 20, and the difference is that the fourth sound absorbing structure 50 has four partition plates D52, and the four partition plates D52 divide the cavity D51 into a first cavity D511, a second first cavity D512, a third first cavity D513, a fourth first cavity D514 and a fifth first cavity D515 which are communicated in sequence; the tube portion D53 is located in the first cavity D511. In the present application, each through hole is located on the same side of the sound absorbing device.
In particular, the fourth sound absorbing structure 50 is preferably a square-shaped cavity in a cross section perpendicular to the up-down direction (and the present application provides for more convenient measurement of sound absorption coefficients of the fourth sound absorbing structure 50, each specific parameter of the four fourth sound absorbing structures 50 being listed below:
the thickness of each fourth sound absorption structure 50 along the sound absorption direction is 37mm, the cross section area of each first cavity D511, 512, 513, 514, 515 along the vertical direction is 13x13mm, the thickness of the wall body of each sound absorption cavity is 1mm, and the thickness of each cover plate is 1mm. Wherein each through hole in the fourth sound absorbing structure 50 has a diameter of 8mm, each pipe portion D53 has a first length L1 in the up-down direction of 13mm, 17mm, 21mm, 25mm, respectively, and each pipe portion D53 has a thickness of 1mm. Through the data simulation, the sound absorption coefficient of the sound absorption device formed by the four fourth sound absorption structures 50 is measured, the average value of the sound absorption coefficients in the frequency range of 320Hz-440Hz is good, and the sound absorption device has excellent sound absorption performance in the frequency range.
In this embodiment, four fifth sound absorbing structures 60 may be arranged to form a sound absorbing device, as shown in fig. 8, the fifth sound absorbing structure 60 is substantially the same as the first sound absorbing structure 20, except that the fifth sound absorbing structure 60 has five partition boards E62, and the five partition boards E62 divide the cavity E61 into a first cavity E611, a second first cavity E612, a third first cavity E613, a fourth first cavity E614, a fifth first cavity E615 and a sixth first cavity E616, which are communicated in sequence; the tube portion E63 is located within the first cavity E611. In the present application, each through hole is located on the same side of the sound absorbing device.
In particular, the fifth sound absorbing structure 60 is preferably a square-shaped cavity in a cross section perpendicular to the up-down direction (and the present application provides for more convenient determination of the sound absorption coefficient of the fifth sound absorbing structure 60. Each specific parameter of the four fifth sound absorbing structures 60 is listed below:
wherein, each fifth sound absorbing structure 60 has a thickness of 37mm along the sound absorbing direction, each first cavity E611, 612, 613, 614, 615, 616 has a cross-sectional area of 13x13mm along the vertical direction, each sound absorbing cavity has a wall thickness of 1mm, and each cover plate has a thickness of 1mm. Wherein each through hole in the fifth sound absorbing structure 60 has a diameter of 8mm, each pipe portion E63 has a first length L1 in the up-down direction of 17mm, 21mm, 25mm, 29mm, respectively, and each pipe portion E63 has a thickness of 1mm. Through the data simulation, the sound absorption coefficient of the sound absorption device formed by the four fifth sound absorption structures 60 is measured, the average value of the sound absorption coefficients in the frequency range of 280Hz-310Hz is good, and the sound absorption device has excellent sound absorption performance in the frequency range.
In this embodiment, a sixth sound absorbing structure 70 may also be a sound absorbing device, as shown in fig. 9, the sixth sound absorbing structure 70 is substantially the same as the first sound absorbing structure 20, except that the sixth sound absorbing structure 70 has six partitions F72, and the six partitions F72 divide the cavity F71 into a first cavity F711, a second first cavity F712, a third first cavity F713, a fourth first cavity F714, a fifth first cavity F715, a sixth first cavity F716 and a seventh first cavity F717, which are communicated in sequence; the tube portion F73 is located in the first cavity F711.
Specifically, the sixth sound absorbing structure 70 is preferably a square-shaped cavity in a cross section perpendicular to the up-down direction. And the present application, for more convenient determination of the sound absorption coefficient of the sixth sound absorption structure 70, enumerates each specific parameter of the sixth sound absorption structure 70 as follows:
the thickness of the sixth sound absorbing structure 70 along the sound absorbing direction is 37mm, the thickness of the wall body of the sound absorbing cavity is 1mm, the thickness of the cover plate is 1mm, and the cross section area of each first cavity F711, 712, 713, 714, 715, 716, 717 along the vertical direction is 13x13mm. Wherein the through holes in the sixth sound absorbing structure 70 are each 7mm in diameter, the pipe portions F73 in the sixth sound absorbing structure 70 have a first length L1 of 24mm, and each pipe portion F73 has a thickness of 1mm. Through the data simulation, the sound absorption coefficient of the sound absorption device formed by the sixth sound absorption structure 70 is measured, the average value of the sound absorption coefficients in the frequency range of 260Hz-280Hz is good, and the sound absorption device has excellent sound absorption performance in the frequency range.
In the present embodiment, the noise reduction plate is formed by jointly arranging and combining the sound absorption devices composed of the eight single sound absorption structures 10, the sound absorption devices composed of the fifteen first sound absorption structures 20, the sound absorption devices composed of the one second sound absorption structure 30, the sound absorption devices composed of the six third sound absorption structures 40, the sound absorption devices composed of the four fourth sound absorption structures 50, the sound absorption devices composed of the four fifth sound absorption structures 60, and the sound absorption devices composed of the one sixth sound absorption structure 70, and has a first side face and a second side face which are oppositely disposed, and the through hole and the second through hole on each wide-width sound absorption device for a building are located on the first side face. The average value of the sound absorption coefficient of the frequency range of 280Hz-1050Hz is larger than 0.65 as measured by the sound absorption coefficient of the noise reduction plate, and the noise reduction plate has excellent sound absorption performance in the frequency range.
In the present application, the following details are given in relation to the formula section:
in each single sound absorbing structure 10, the calculation formula of the volume V0 outside the second tube portion 13 in the second cavity 111 is:
wherein L0 is the thickness of the second cavity 111 along the sound absorption direction, A0 is the sectional area of the second cavity 111 along the direction perpendicular to the sound absorption direction, +.>Is the diameter of the outer wall of the second pipe portion 13.
In each first sound absorption structure 20 or the second sound absorption structure 30 or the third sound absorption structure 40 or the fourth sound absorption structure 50 or the fifth sound absorption structure 60 or the sixth sound absorption structure 70, all the first cavities without the pipe portion disposed in the cavities can be equivalent to 1 unit cell, and the calculation formula of the volume Veffi of the unit cell is as follows:
；
where Leff is the total length of all the first cavities equivalent to 1 unit cell (i.e., the total thickness of all the first cavities without the tube portion disposed in the sound absorption direction), and a is the cross-sectional area of the unit cell after the equivalent of the ith sound absorption structure (i.e., the cross-sectional area of each first cavity in the sound absorption structure in the direction perpendicular to the sound absorption direction).
The calculation formula of the volume V2 of each of the first sound absorbing structures 20, the second sound absorbing structure 30, the third sound absorbing structure 40, the fourth sound absorbing structure 50, the fifth sound absorbing structure 60, or the sixth sound absorbing structure 70, which is located outside the pipe portion in the cavity, is:
；
;
wherein L is the thickness of the first cavity with the pipe part along the sound absorption direction,is the diameter of the outer side wall of the pipe part, +.>Is the cross-sectional area of the tube portion of the ith sound absorbing structure.
The formula for calculating the sound absorption coefficient a is:
；
wherein Z is the total impedance of all sound absorbing structures in the noise reduction plate.
The formula of the total impedance Z is:
；
wherein x is the number of sound absorption structures in the noise reduction plate.
The calculation formula of the single sound absorption structure impedance Zi is:
；
wherein Zi is the impedance of the ith sound absorption structure after being equivalent, and V is the volume of the ith sound absorption structure outside the pipe part (or the second pipe part) in the cavity (or the second cavity).
And the extension calculation formula is as follows:
；
；
；
；
；
；
；
；
。
wherein,，/>，/>for the thickness of the inner cavity of the unit cell (i.e. the first cavity or the second cavity) after the equivalent of the ith sound absorption structure along the sound absorption direction, +.>Length of pipe part for ith sound absorption structure,/->For the shear viscosity coefficient of the fluid +.>For constant pressure specific heat capacity->Is a bezier function of order 0 and 2.
In other implementations of this embodiment, the noise reduction plate may be further formed by arbitrarily arranging at least the first sound absorption structure 20, and/or at least the second sound absorption structure 30, and/or at least the third sound absorption structure 40, and/or at least the fourth sound absorption structure 50, and/or at least the fifth sound absorption structure 60, and/or at least the sixth sound absorption structure 70, so as to achieve the effect of absorbing sound in a certain frequency band.
In summary, the application discloses a wide muffler device for a building, which is used for adjusting the frequency range of sound absorption by controlling the number of first cavities in a sound absorption cavity, so as to realize the effect of sound absorption on a certain frequency range. The application also discloses a noise reduction plate formed by arranging a plurality of wide noise reduction devices for the building, which can realize the effect of absorbing sound in a certain frequency band or the whole frequency band within the frequency range of 280Hz-1050 Hz.
It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment contains only one independent technical solution, and that such description is provided for clarity only, and that the technical solutions of the embodiments may be appropriately combined to form other embodiments that will be understood by those skilled in the art.
Claims (11)
1. A wide-width muffler device for a building, comprising:
the sound absorption cavity is provided with a cavity with an upward opening;
the cover plate is positioned above the sound absorption cavity and covers the opening of the cavity of the sound absorption cavity;
at least one baffle, one end of each baffle is arranged on the cover plate, the other end of each baffle extends downwards and is positioned in the cavity, and at least one baffle sequentially separates the cavity into at least two communicated first cavities;
the cover plate is provided with a through hole, the hole wall of the through hole downwards extends from the lower surface of the cover plate to form a pipe part, a flow passage connected with the through hole is arranged in the pipe part, and the cavity of the sound absorption cavity is communicated with the outside of the sound absorption cavity through the flow passage.
2. A wide format muffler device for a building as set forth in claim 1, wherein said pipe portion is located within a first one of said first cavities.
3. A wide range muffler device for a building according to claim 1 or 2, wherein the dimensions of each of the first cavities are the same.
4. A wide muffler device for a building according to claim 1 or 2, wherein each of the partition plates has the same height L2 in the up-down direction.
5. The wide muffler device for a building according to claim 4, wherein the pipe portion has a first length L1 in an up-down direction, the partition plate has a height L2, and the first length L1 is smaller than the height L2.
6. A wide muffler device for a building according to claim 1 or 2, wherein the first length L1 of the pipe portion has a value ranging from: l1 is more than or equal to 3mm and less than or equal to 29mm.
7. A wide muffler device for a building according to claim 1 or 2, wherein the flow passage has a circular or polygonal cross-sectional shape in a direction perpendicular to the up-down direction.
8. A noise reduction plate having a first side and a second side disposed opposite to each other, comprising a plurality of wide muffler devices for a building according to any one of claims 1 to 7, wherein the plurality of wide muffler devices for a building comprises:
at least one of the wide-amplitude muffler devices for a building is a first sound absorbing structure having one of the partitions, and;
at least one of the wide-amplitude muffler devices for a building is a second sound absorbing structure having two of the baffles, and/or;
at least one of the wide-width muffler devices for a building is a third sound absorbing structure having three of the partitions, and/or;
at least one of the wide-amplitude muffler devices for a building is a fourth sound absorbing structure having four of the partitions, and/or;
at least one of the wide-amplitude muffler devices for a building is a fifth sound absorbing structure having five of the partitions, and/or;
at least one of the wide-amplitude muffler devices for a building is a sixth sound absorbing structure having six of the partitions;
wherein each of the through holes is located on the first side.
9. The noise reduction plate according to claim 8, wherein the values of the first lengths L1 of the at least two pipe portions are different in at least two of the first sound absorption structure or the second sound absorption structure or the third sound absorption structure or the fourth sound absorption structure or the fifth sound absorption structure or the sixth sound absorption structure.
10. The noise reduction plate of claim 8, further comprising a single sound absorbing structure;
the single sound absorbing structure includes: the second sound absorption cavity is provided with a second cavity with an upward opening; the second cover plate is positioned above the second sound absorption cavity and covers the opening of the second cavity of the second sound absorption cavity; the second cover plate is provided with a second through hole, the hole wall of the second through hole downwards extends from the lower surface of the second cover plate to form a second pipe part, a second flow passage connected with the second through hole is arranged in the second pipe part, and a second cavity of the second sound absorption cavity is communicated with the outside of the second sound absorption cavity through the second flow passage;
wherein each through hole and each second through hole are positioned on the first side surface.
11. A noise reduction plate as defined in claim 10, wherein each of said first and second cavities is the same size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311481815.1A CN117211427A (en) | 2023-11-09 | 2023-11-09 | Broad-width silencing device for building and noise reduction plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311481815.1A CN117211427A (en) | 2023-11-09 | 2023-11-09 | Broad-width silencing device for building and noise reduction plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117211427A true CN117211427A (en) | 2023-12-12 |
Family
ID=89046615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311481815.1A Pending CN117211427A (en) | 2023-11-09 | 2023-11-09 | Broad-width silencing device for building and noise reduction plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117211427A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6283245B1 (en) * | 1996-11-27 | 2001-09-04 | William E. Thurman | Media free sound attenuator |
| JP2012123293A (en) * | 2010-12-10 | 2012-06-28 | Toshiba Corp | Stationary inductance electrical appliance and low frequency sound absorbing wall |
| EP2524788A1 (en) * | 2011-05-16 | 2012-11-21 | Sealed Air Corporation (US) | Method of perforating a foam structure and an acoustic foam structure |
| CN109559728A (en) * | 2018-11-26 | 2019-04-02 | 中国人民解放军国防科技大学 | Broadband sound absorption structure of zigzag cavity micro-perforated plate |
| CN112185332A (en) * | 2020-09-29 | 2021-01-05 | 西南大学 | Porous flexible FP passageway self-adaptation broadband sound absorbing structure |
| CN216871579U (en) * | 2022-01-17 | 2022-07-01 | 上海声望声学科技股份有限公司 | Resonant coupling metamaterial structure and sound absorption baffle |
| CN115019759A (en) * | 2022-06-22 | 2022-09-06 | 广州美的华凌冰箱有限公司 | Noise elimination device and sound processing method |
| CN115352374A (en) * | 2022-10-21 | 2022-11-18 | 质子汽车科技有限公司 | Vehicle cab and vehicle |
| CN116110360A (en) * | 2023-01-04 | 2023-05-12 | 株洲时代新材料科技股份有限公司 | Metamaterial full-band sound absorption structure |
| CN116564257A (en) * | 2022-11-29 | 2023-08-08 | 西安交通大学 | An underwater sound-absorbing structure of coiled perforated plate with damping lining space |
| CN116834390A (en) * | 2023-06-16 | 2023-10-03 | 哈尔滨工程大学 | Wide low-frequency sound absorption vibration reduction coating structure and design method |
-
2023
- 2023-11-09 CN CN202311481815.1A patent/CN117211427A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6283245B1 (en) * | 1996-11-27 | 2001-09-04 | William E. Thurman | Media free sound attenuator |
| JP2012123293A (en) * | 2010-12-10 | 2012-06-28 | Toshiba Corp | Stationary inductance electrical appliance and low frequency sound absorbing wall |
| EP2524788A1 (en) * | 2011-05-16 | 2012-11-21 | Sealed Air Corporation (US) | Method of perforating a foam structure and an acoustic foam structure |
| CN109559728A (en) * | 2018-11-26 | 2019-04-02 | 中国人民解放军国防科技大学 | Broadband sound absorption structure of zigzag cavity micro-perforated plate |
| CN112185332A (en) * | 2020-09-29 | 2021-01-05 | 西南大学 | Porous flexible FP passageway self-adaptation broadband sound absorbing structure |
| CN216871579U (en) * | 2022-01-17 | 2022-07-01 | 上海声望声学科技股份有限公司 | Resonant coupling metamaterial structure and sound absorption baffle |
| CN115019759A (en) * | 2022-06-22 | 2022-09-06 | 广州美的华凌冰箱有限公司 | Noise elimination device and sound processing method |
| CN115352374A (en) * | 2022-10-21 | 2022-11-18 | 质子汽车科技有限公司 | Vehicle cab and vehicle |
| CN116564257A (en) * | 2022-11-29 | 2023-08-08 | 西安交通大学 | An underwater sound-absorbing structure of coiled perforated plate with damping lining space |
| CN116110360A (en) * | 2023-01-04 | 2023-05-12 | 株洲时代新材料科技股份有限公司 | Metamaterial full-band sound absorption structure |
| CN116834390A (en) * | 2023-06-16 | 2023-10-03 | 哈尔滨工程大学 | Wide low-frequency sound absorption vibration reduction coating structure and design method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2164370A1 (en) | Reactive acoustic silencer | |
| WO2016054947A1 (en) | Vacuum cleaner | |
| CN215215286U (en) | Ventilating duct silencer suitable for underground environment | |
| CN117211427A (en) | Broad-width silencing device for building and noise reduction plate | |
| CN118397994B (en) | Multi-mechanism coupling full-band acoustic metamaterial sound absorption module and sound elimination chamber thereof | |
| CN107610688B (en) | Cavity tube composite sound insulation structure | |
| WO2022126500A1 (en) | Formaldehyde-purifying and sound-insulating ecological board | |
| CN116825063A (en) | Acoustic metamaterial large-area short-channel broadband ventilation sound insulator and barrier | |
| CN207989401U (en) | External impedance composite muffler in one kind | |
| WO2011111890A1 (en) | Transparent elastic sound absorber and insulator | |
| CN214305869U (en) | Drainage pipe with noise reduction structure | |
| CN206360934U (en) | A kind of composite muffler | |
| CN216239297U (en) | Micro-foaming sound-absorbing composite gypsum board | |
| CN110629896B (en) | Selective one-way sound insulation wall based on house building | |
| CN212276803U (en) | Ventilation and sound insulation device | |
| CN213877565U (en) | Sheet type silencer structure | |
| CN209859611U (en) | Efficient noise reduction silencer | |
| CN201738759U (en) | Beam-cavity resonance sound attenuation window | |
| JP7344665B2 (en) | Ventilation opening structure | |
| CN111640413A (en) | Ventilation sound insulation device | |
| CN203797235U (en) | Meshing cavity cotton-free muffler | |
| CN218376987U (en) | Noise reduction volute, fan and range hood | |
| CN201242857Y (en) | Device for air environment noise absorption | |
| JP2005173398A (en) | Sound absorbing device | |
| CN215725256U (en) | Wedge-shaped silencing cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |