A unit plate type sound barrier interferometer and a sound barrier composed thereof

Abstract

The present invention provides a unit plate type sound barrier interferometer and the sound barrier composed of the same, which belongs to the technical field of environmental noise and traffic noise control. The unit plate type sound barrier interferometer comprises a back plate and a panel, wherein a holding cavity for holding the sound wave interferometer is formed between the back plate and the panel; the sound wave interferometer comprises a bottom plate, wherein a sound wave interference device is arranged on the bottom plate, and the sound wave interference device is composed of sound wave diffusion units arranged with different periodicities, and the sound wave diffusion units arranged with different periodicities are composed of a group of acoustic element blocks arranged according to a two-dimensional quadratic residue law, and the acoustic element blocks form a two-dimensional tic-tac-toe structure with different depths, thereby changing the sound absorption frequency of the sound wave diffusion unit; the present invention is designed with a sound wave interference device, which is arranged according to a two-dimensional quadratic residue law, and can have excellent sound absorption and diffusion performance for noises of different frequencies.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental noise and traffic noise control, and relates to an interferometer, in particular to a unit plate type sound barrier interferometer and a sound barrier composed thereof. Background Art

[0002] With the development of my country's socioeconomic landscape and the continuous improvement of people's living standards, higher demands have been placed on environmental issues. Traffic noise pollution is a major and challenging issue affecting people's lives, work, and studies. Currently, the primary means of addressing this noise problem is to install sound barriers on both sides of roads. The principle of a sound barrier is to block the propagation of noise by placing a barrier between the noise source and the receiving point. Within the acoustic shadow behind the barrier, noise levels are significantly reduced, effectively protecting the receiving point. The primary factor affecting the size of the acoustic shadow is diffracted sound attenuation. Research has shown that medium and low-frequency sound waves are more susceptible to diffraction, which can negatively impact the receiving point.

[0003] At present, Cai Jun of Shanghai Jiao Tong University has disclosed a noise reduction structure on the top of a low-frequency anti-diffraction sound barrier, with the patent number CN108396668A. This anti-diffraction structure is placed on the top of the sound barrier, and its interferometer is installed perpendicular to the original sound barrier. The design principle of this structure is based on the fact that the QRD one-dimensional diffuser has a good absorption effect on low-frequency sound waves. It is arranged on the top of the sound barrier to form an improved T-shaped sound screen. However, its noise reduction structure is arranged on the top of the sound barrier, which increases the construction difficulty and the safety of the sound barrier, and also has a certain impact on the aesthetics. In addition, the application scenarios and costs of this sound barrier are greatly limited. Summary of the Invention

[0004] Purpose of the invention: The purpose of the present invention is to address the shortcomings of the existing technology and provide a unit plate type sound barrier interferometer, which can have excellent sound absorption and diffusion performance for noise of different frequencies by designing a sound wave interference device.

[0005] Technical solution: The unit plate type sound barrier interferometer described in the present invention includes a back plate and a panel, and a accommodating cavity for accommodating the sound wave interferometer is formed between the back plate and the panel; the accommodating cavity is made of at least one of a steel plate or an aluminum plate through a certain process, and has a thickness of 1.0 mm to 1.5 mm; the depth of the accommodating cavity is 75 mm to 135 mm.

[0006] The acoustic wave interferometer includes a bottom plate, on which an acoustic wave interference device is provided. The acoustic wave interference device is composed of acoustic wave diffusion units arranged with different periodicities. The acoustic wave diffusion units arranged with different periodicities include a first acoustic wave diffusion unit with a periodicity of 7, a second acoustic wave diffusion unit with a periodicity of 11, and a third acoustic wave diffusion unit with a periodicity of 13.

[0007] The sound wave diffusion units with different periodic arrangements are composed of a group of acoustic element blocks arranged according to a two-dimensional quadratic remainder rule. The acoustic element blocks form a two-dimensional tic-tac-toe structure with different depths, thereby changing the sound absorption frequency of the sound wave diffusion unit.

[0008] Furthermore, a top seal is provided on the top of the back panel and the panel, an edge seal is provided on both sides of the back panel and the panel, and a bottom seal is provided on the bottom of the back panel and the panel. The back panel and the panel form a box-type outer frame unit through the top seal, the edge seal and the bottom seal; the sound wave interference device is fixed inside through the box-type outer frame structure to form a unit plate sound barrier interferometer that is consistent with the specifications and form of ordinary sound barriers.

[0009] Furthermore, at least one drainage hole is provided at the bottom of the back plate, and the shape of the drainage hole is circular, waist-shaped or rectangular.

[0010] Furthermore, the panel is a perforated plate or a micro-perforated plate, in the form of at least one of a flat plate or a wave plate; the material of the perforated panel is at least one of an aluminum plate or a steel plate, with a thickness of 1.0mm to 1.5mm and a pore size of 2.5mm to 6.0mm; the micro-perforated panel is at least one of an aluminum plate or a steel plate, with a thickness of 1.0mm to 1.5mm and a pore size of 1.0mm to 1.2mm; the perforation rate of the perforated plate does not exceed 28%, and the perforation rate of the micro-perforated plate does not exceed 10%.

[0011] Furthermore, the boundary of the sound wave diffusion unit is X∈[0,i], Y∈[0,i], where X is the horizontal coordinate of the sound wave diffusion unit and Y is the vertical coordinate of the sound wave diffusion unit; i Y i is the height coefficient of the coordinate.

[0012] Furthermore, the acoustic element block C1 is formed by bonding at least one of aeolian sand, river sand, and perlite using a gel solvent. The acoustic element block is formed by bonding aeolian sand, river sand, perlite, and other materials using an organic solvent. Such materials not only have good environmental performance, low cost, and are easy to obtain, but also have excellent broadband noise reduction performance after specific design, especially good absorption and suppression of low-frequency sound waves.

[0013] Furthermore, the acoustic wave interferometer is fixed in the accommodating cavity by at least two supporting members; the supporting member is at least one of a U-shaped aluminum member or a U-shaped steel structure member; the supporting member is fixed to the back plate by a fixing member, and the width is 30mm to 70mm.

[0014] Furthermore, the acoustic element block has a square vertical cross-section, with a width ranging from 50mm to 100mm and a height ranging from 20mm to 120mm (the height is measured from the bottom to the top of the block). The acoustic element block is constructed from at least one of aeolian sand or river sand bonded together using an environmentally friendly gel solvent, providing diffuse sound absorption. The acoustic element block must have a fire rating of B2 or higher, and a noise reduction coefficient (NRC) of 0.60 to 0.90.

[0015] The working principle of the present invention is as follows:

[0016] The acoustic interference device is constructed of sound-absorbing materials arranged in a two-dimensional quadratic residue pattern. The diffusion and absorption mechanism of a conventional quadratic residue diffuser is as follows: due to the inconsistent heights of the rigid units, sound waves are decomposed into numerous reflected sound waves with relatively unconcentrated sound energy upon reaching the surface of each unit block, dispersing the additional sound energy caused by diffusion over a wider range. After being incident on the surfaces of rigid units at different heights, the sound waves are emitted. The reflected sound waves travel different distances to reach the diffuser's surface, but their phases are inconsistent, causing interference at the surface of the structure and resulting in sound energy dissipation. This type of diffuser with wings has a certain absorption effect on low-frequency sound waves.

[0017] The interferometer shown in the present invention can be customized and can be used in scenarios where upright sound barriers can be used; T-shaped sound barriers are generally not used on viaducts and high-speed railways due to considerations such as aesthetics and safety. In addition, T-shaped sound barriers will occupy the original space.

[0018] The present invention also provides a unit-plate sound barrier, comprising steel columns on both sides, with conventional sound barrier unit panels positioned between the steel columns. Conventional sound barrier unit panels are spliced ​​together, and the aforementioned interferometer can be positioned on top. This sound barrier has a better effect on suppressing sound wave diffraction, increases the area of ​​the acoustic shadow zone, and has higher insertion loss, providing better protection for sensitive points affected by noise. Furthermore, the use of non-metallic materials is more environmentally friendly.

[0019] Beneficial effects: Compared with the prior art, the advantages of the present invention are:

[0020] (1) The present invention is used to replace the top interference device used in traditional sound barriers. The installation method of the sound barrier is consistent with that of the original sound barrier. When it is installed at the top of the sound barrier, it can effectively suppress diffracted sound waves.

[0021] (2) The sound wave interference device in the sound barrier interferometer of the present invention can not only effectively suppress the diffraction of the sound screen, but also effectively diffuse the sound waves with relatively concentrated energy, thereby increasing the sound absorption efficiency of the sound absorbing material used in the sound barrier;

[0022] (3) The present invention provides at least three interferometers with different sound absorption frequencies, which have excellent sound absorption and diffusion performance for noises of different frequencies;

[0023] (4) When the present invention is applied to a vertical sound barrier, the overall insertion loss is improved by 2 to 5 decibels compared to vertical sound barriers of the same specifications; it can effectively improve the insertion loss of the sound barrier;

[0024] (5) In the present invention, the acoustic interference device adopts a unit with a sound-absorbing effect, which can not only increase the absorption of sound energy by the entire interference device, but also effectively increase the reflection of sound waves. For sound waves with relatively concentrated energy, the concentrated energy sound waves can be effectively dispersed into sound waves with weaker energy, which can effectively reduce the transmitted sound energy;

[0025] (6) In the present invention, the surface of the unit panel is usually protected by a perforated plate. When low-frequency sound energy is concentrated, a micro-perforated plate is used to compensate for the sound absorption of the unit panel.

[0026] (7) In the present invention, the interferometer is installed at the upper part of the sound barrier. It has a good suppressing and absorbing effect on low-frequency sound waves propagating to the upper part of the sound barrier, and has a good diffusing effect on medium and high-frequency sound waves. It can increase the cutoff range of medium and high-frequency sound waves in the bright area, thereby increasing the range of the sound shadow area. At the same time, the medium and high-frequency sound waves are reflected to a wider range, increasing the sound absorption efficiency of the bottom material of the sound barrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of Example 4 of the present invention;

[0028] Figure 2 Schematic diagram of the structure of the unit plate interferometer in the present invention;

[0029] Figure 3 Schematic diagram of the structure of the acoustic wave interference device in the present invention;

[0030] Figure 4 Schematic cross-sectional view of a unit plate interferometer in the present invention;

[0031] Figure 5 The acoustic element blocks of the unit plate interferometer in the embodiment of the present invention are arranged in N=7;

[0032] Figure 6 The acoustic element blocks of the unit plate interferometer in the embodiment of the present invention are arranged in N=11;

[0033] Figure 7 The acoustic element blocks of the unit plate interferometer in the embodiment of the present invention are arranged in N=13;

[0034] The following are marked in the figure: 1. Sound barrier unit panel; 2. Ordinary sound barrier unit panel; 3. Steel column; 101. Sound wave interference device; 102. Perforated panel; 103. Back panel; 104. Support member; 105. Accommodation cavity; C1. Acoustic element block; M1. Top seal; M2. Edge seal; M3. Bottom seal. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0036] The sound absorption test mentioned in this embodiment is based on the national standard "GB / T 20247-2006 Acoustic Reverberation Chamber Sound Absorption Measurement", and the sound absorption test location is: Acoustic Reverberation Laboratory; the sound insulation test is based on the national standard "GB / T 19889.3-2005 Acoustic Buildings and Building Elements Sound Insulation Part 3: Laboratory Measurement of Airborne Sound Insulation of Building Elements".

[0037] Example 1

[0038] like Figure 2 、 3 A unit plate type sound barrier interferometer shown in Figures 4 and 5 includes a back plate 103 and a panel 102, and a housing cavity 105 for accommodating the sound wave interferometer 101 is formed between the back plate 103 and the panel 102; the sound wave interferometer 101 includes a bottom plate, and a sound wave interference device is provided on the bottom plate, and the sound wave interference device is a first sound wave diffusion unit with a periodicity of 7.

[0039] The perforated panel 102 and the back panel 103 containing the accommodating cavity 105 are connected together by snapping together; the perforated panel 102 is made of aluminum plate with a thickness of 1.5 mm, a perforation diameter of 2.5 mm, a perforation rate of 26%, and an edge seal M2 is installed on the outside, two of which are installed, and the installation method is symmetrical; the back panel 103 containing the accommodating cavity 105 is made of aluminum plate with a thickness of 1.5 mm, a depth of the accommodating cavity of 135 mm, and an edge seal M2 is installed on the outside, two of which are installed; the upper seal M1 is installed on the upper part (protruding part) of the back panel 103, and the lower seal M3 is installed on the lower part (recessed part).

[0040] The sound wave diffusion unit is composed of a group of acoustic element blocks C1 arranged according to the two-dimensional quadratic residue rule. The acoustic element blocks C1 form a two-dimensional tic-tac-toe structure with different depths to change the sound absorption frequency of the sound wave diffusion unit. The boundary of the sound wave diffusion unit is X∈[0,i], Y∈[0,i], where X is the horizontal coordinate of the sound wave diffusion unit and Y is the vertical coordinate of the sound wave diffusion unit; X i Y i is the height coefficient of the coordinate.

[0041] The acoustic interference device is composed of acoustic element blocks C1 arranged in a two-dimensional quadratic remainder manner with N=7 periodicity. The specific arrangement is that each unit plate interferometer 101 contains an acoustic interference device with a period of 7 for at least one period; the element block C1 is made of aeolian sand bonded by an environmentally friendly gel solvent, with a length and width of 68mm, and a height coefficient according to the following Figure 5 The numbers shown are arranged as follows:

[0042] When the Y axis is 0, and the X axis is 0, 1, 2, 3, 4, 5, and 6 respectively, the height coefficients are 2, 2, 6, 3, 3, 6, and 2 respectively;

[0043] When the Y axis is 1, and the X axis is 0, 1, 2, 3, 4, 5, and 6 respectively, the height coefficients are 2, 3, 8, 5, 5, 8, and 3 respectively;

[0044] When the Y axis is 2, and the X is 0, 1, 2, 3, 4, 5, and 6 respectively, the height coefficients are 6, 8, 2, 9, 9, 2, and 8 respectively;

[0045] When the Y axis is 3, and the X is 0, 1, 2, 3, 4, 5, and 6 respectively, the height coefficients are 3, 5, 9, 6, 6, 9, and 5 respectively;

[0046] When the Y axis is 4, and the X is 0, 1, 2, 3, 4, 5, and 6 respectively, the height coefficients are 3, 5, 9, 6, 6, 9, and 5 respectively;

[0047] When the Y axis is 5, and the X is 0, 1, 2, 3, 4, 5, and 6 respectively, the height coefficients are 6, 8, 2, 9, 9, 2, and 8 respectively;

[0048] When the Y axis is 6, and the X is 0, 1, 2, 3, 4, 5, and 6 respectively, the height coefficients are 2, 3, 8, 5, 5, 8, and 3 respectively.

[0049] This arrangement has excellent sound absorption and diffusion performance for noise within the range of 125Hz to 5000Hz, especially for low-frequency noise within the range of 125Hz to 630Hz. It has a good suppression effect, which can increase the insertion loss of the sound barrier at the same height by 2dB to 3dB; the acoustic element blocks C1 are bonded together by a gel solvent to form an acoustic wave interference device 101. A support member 104 is installed in the accommodating cavity 105. The support member 104 is made of aluminum alloy, has a thickness of 1.5mm, and a height of 40mm. It is fixed to the back plate by rivets. There are two support members 104 and they are symmetrically arranged. The bottom surface of the acoustic wave interference device is fixed on the support member 104. The noise reduction coefficient NRC of the assembled product is 0.60 to 0.85, the diffusion coefficient is 0.3 to 0.7, and the weighted sound insulation R W 26dB to 32dB.

[0050] Example 2

[0051] like Figure 2 、 3 , 4, and 6 show a unit plate type sound barrier interferometer, comprising a back plate 103 and a panel 102, with a housing cavity 105 for accommodating an acoustic wave interferometer 101 formed between the back plate 103 and the panel 102; the acoustic wave interferometer 101 comprises a bottom plate, on which an acoustic wave interference device is provided, the acoustic wave interference device being a second acoustic wave diffusion unit with a periodicity of 11. The boundary of the acoustic wave diffusion unit is X∈[0,i], Y∈[0,i], where X is the transverse coordinate of the acoustic wave diffusion unit and Y is the longitudinal coordinate of the acoustic wave diffusion unit; X i Y i is the height coefficient of the coordinate.

[0052] The perforated panel 102 and the back panel 103 containing the accommodating cavity 105 are connected together by snapping together; the perforated panel 102 is made of aluminum plate with a thickness of 1.5 mm, a perforation diameter of 2.5 mm, a perforation rate of 26%, and an edge seal M2 is installed on the outside, two of which are installed, and the installation method is symmetrical; the back panel 103 containing the accommodating cavity 105 is made of aluminum plate with a thickness of 1.5 mm, a depth of the accommodating cavity of 135 mm, and an edge seal M2 is installed on the outside, two of which are installed; the upper seal M1 is installed on the upper part (protruding part) of the back panel 103, and the lower seal M3 is installed on the lower part (recessed part).

[0053] The acoustic interference device is composed of acoustic element blocks C1 arranged in a two-dimensional quadratic remainder manner in a periodic arrangement of N=11. The specific arrangement is that each unit plate interferometer 101 contains at least one period of an acoustic interference device with a period of 11; the element block C1 is made of aeolian sand bonded by an environmentally friendly gel solvent, with a length and width of 43mm and a height of Figure 6 The numbers shown are arranged as follows:

[0054] When the Y axis is 0, and the X axis is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 respectively, the height coefficients are 0, 1, 4, 9, 5, 3, 3, 5, 9, 4, and 1 respectively;

[0055] When the Y axis is 1, and the X axis is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 respectively, the height coefficients are 1, 2, 5, 10, 6, 4, 4, 6, 10, 5, and 2 respectively;

[0056] When the Y axis is 2, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, the height coefficients are 4, 5, 8, 2, 9, 7, 7, 9, 2, 8, and 5 respectively;

[0057] When the Y axis is 3, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, the height coefficients are 9, 10, 2, 7, 3, 1, 1, 3, 7, 2, and 10 respectively;

[0058] When the Y axis is 4, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, the height coefficients are 5, 4, 7, 1, 8, 6, 6, 8, 1, 7, and 4 respectively;

[0059] When the Y axis is 5, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, the height coefficients are 3, 4, 7, 1, 8, 6, 6, 8, 1, 7, and 4 respectively;

[0060] When the Y axis is 6, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, the height coefficients are 3, 4, 7, 1, 8, 6, 6, 8, 1, 7, and 4 respectively;

[0061] When the Y axis is 7, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, the height coefficients are 5, 6, 9, 3, 10, 8, 8, 10, 3, 9, and 6 respectively;

[0062] When the Y axis is 8, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, the height coefficients are 9, 10, 2, 7, 3, 1, 1, 3, 7, 2, and 10 respectively;

[0063] When the Y axis is 9, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, the height coefficients are 4, 5, 8, 2, 9, 7, 7, 9, 2, 8, and 5 respectively;

[0064] When the Y axis is 10, and the X axis is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 respectively, the height coefficients are 1, 2, 5, 10, 6, 4, 4, 6, 10, 5, and 2 respectively.

[0065] This arrangement has excellent sound absorption and diffusion performance for noise within the range of 315Hz to 5000Hz, especially for low-frequency noise within the range of 315Hz to 800Hz. It has a good suppression effect, which can increase the insertion loss of the sound barrier at the same height by 2dB to 3dB; the element blocks C1 are bonded together by a gel solvent to form an acoustic wave interference device 101. A support member 104 is installed in the accommodating cavity 105. The support member 104 is made of aluminum alloy, has a thickness of 1.5mm, and a height of 30mm. It is fixed to the back plate by rivets. There are two support members 104 and they are symmetrically arranged. The bottom surface of the acoustic wave interference device is fixed on the support member 104. The noise reduction coefficient NRC of the assembled product is 0.60 to 0.85, the diffusion coefficient is 0.3 to 0.6, and the weighted sound insulation R W26dB to 32dB.

[0066] Example 3

[0067] like Figure 2 、 3 , 4, and 7 show a unit plate type sound barrier interferometer, comprising a back plate 103 and a panel 102, with a housing cavity 105 for accommodating an acoustic wave interferometer 101 formed between the back plate 103 and the panel 102; the acoustic wave interferometer 101 comprises a bottom plate, on which an acoustic wave interference device is provided, the acoustic wave interference device being a third acoustic wave diffusion unit with a periodicity of 13. The boundary of the acoustic wave diffusion unit is X∈[0,i], Y∈[0,i], where X is the transverse coordinate of the acoustic wave diffusion unit and Y is the longitudinal coordinate of the acoustic wave diffusion unit; X i Y i is the height coefficient of the coordinate.

[0068] The perforated panel 102 and the back panel 103 containing the accommodating cavity 105 are connected together by snapping together; the perforated panel 102 is made of aluminum plate with a thickness of 1.5 mm, a perforation diameter of 2.5 mm, a perforation rate of 26%, and an edge seal M2 is installed on the outside, two of which are installed, and the installation method is symmetrical; the back panel 103 containing the accommodating cavity 105 is made of aluminum plate with a thickness of 1.5 mm, a depth of the accommodating cavity of 135 mm, and an edge seal M2 is installed on the outside, two of which are installed; the upper seal M1 is installed on the upper part (protruding part) of the back panel 103, and the lower seal M3 is installed on the lower part (recessed part).

[0069] The acoustic interference device is composed of acoustic element blocks C1 arranged in a two-dimensional quadratic remainder manner in a periodic arrangement of N=13. The specific arrangement is that each unit plate interferometer 101 contains at least one period of acoustic interference devices 101 with a period of 13; the element blocks C1 are made of aeolian sand bonded by an environmentally friendly gel solvent, with a length and width of 37 mm and a height of Figure 7 The numbers shown are arranged as follows:

[0070] When the Y axis is 0, and the X axis is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 respectively, the height coefficients are 0, 1, 4, 9, 3, 12, 10, 10, 12, 3, 9, 4, and 1 respectively;

[0071] When the Y axis is 1, and the X axis is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 respectively, the height coefficients are 1, 2, 5, 10, 4, 0, 11, 11, 0, 4, 10, 5, and 2 respectively;

[0072] When the Y axis is 2, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12, the height coefficients are 4, 5, 8, 0, 7, 3, 1, 1, 3, 7, 0, 8, and 5 respectively;

[0073] When the Y axis is 3, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12, the height coefficients are 9, 10, 0, 5, 12, 8, 6, 6, 8, 12, 5, 0, and 10 respectively;

[0074] When the Y axis is 4, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12, the height coefficients are 3, 4, 7, 12, 6, 2, 0, 0, 2, 6, 12, 7, and 4 respectively;

[0075] When the Y axis is 5, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12, the height coefficients are 12, 0, 3, 8, 2, 11, 9, 9, 11, 2, 8, 3, and 0 respectively;

[0076] When the Y axis is 6, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 respectively, the height coefficients are 10, 11, 1, 6, 0, 9, 7, 7, 9, 0, 6, 1, and 11 respectively;

[0077] When the Y axis is 7, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 respectively, the height coefficients are 10, 11, 1, 6, 0, 9, 7, 7, 9, 0, 6, 1, and 11 respectively;

[0078] When the Y axis is 8, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 respectively, the height coefficients are 12, 0, 3, 8, 2, 11, 9, 9, 11, 2, 8, 3, and 0 respectively;

[0079] When the Y axis is 9, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12, the height coefficients are 3, 4, 7, 12, 6, 2, 0, 0, 2, 6, 12, 7, and 4 respectively;

[0080] When the Y axis is 10, and the X axis is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 respectively, the height coefficients are 9, 10, 0, 5, 12, 8, 6, 6, 8, 12, 5, 0, and 10 respectively;

[0081] When the Y axis is 11, and the X axes are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12, the height coefficients are 4, 5, 8, 0, 7, 3, 1, 1, 3, 7, 0, 8, and 5 respectively;

[0082] When the Y axis is 12, and the X axis is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 respectively, the height coefficients are 1, 2, 5, 10, 4, 0, 11, 11, 0, 4, 10, 5, and 2 respectively.

[0083] This arrangement has excellent sound absorption and diffusion performance for noise within the range of 630Hz to 5000Hz, especially for low-frequency noise within the range of 630Hz to 1000Hz. It has a good suppressive effect, which can increase the insertion loss of the sound barrier at the same height by 2dB to 3dB; the element blocks C1 are bonded together by a gel solvent to form an acoustic wave interference device 101. A support member 104 is installed in the accommodating cavity 105. The support member 104 is made of aluminum alloy, has a thickness of 1.5mm, and a height of 20mm. It is fixed to the back plate by rivets. There are two support members 104 and they are symmetrically arranged. The bottom surface of the acoustic wave interference device is fixed on the support member 104. The noise reduction coefficient NRC of the assembled product is 0.60 to 0.85, the diffusion coefficient is 0.2 to 0.5, and the weighted sound insulation R W 26dB to 32dB.

[0084] In Examples 1 to 3, the shortcomings of the one-dimensional quadratic residue diffuser (QRD one-dimensional diffuser) are improved by using materials with excellent sound absorption performance for medium and low frequencies and using an improved two-dimensional quadratic residue arrangement. The calculation method of the arrangement is:

[0085] Theoretical calculation of two-dimensional quadratic residue structure sequence:

[0086] D=(X^2+Y^2)mod N

[0087] Where: D is the height coefficient, X and Y are two-digit coordinate sequences, mod is a non-negative remainder, and N is an odd prime number.

[0088] Example 4

[0089] like Figure 1 As shown, a unit plate type sound barrier comprises steel columns 3 on both sides, and ordinary sound barrier unit plates 2 are arranged between the steel columns 3. The ordinary sound barrier unit plates 2 can be spliced ​​up and down according to the required height, and then a sound barrier unit plate 1 is arranged on the top thereof, and the sound barrier unit plate 1 is provided with the interferometer 101 described in Examples 1 to 3.

[0090] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A unit plate type sound barrier interferometer, characterized in that: It comprises a back plate (103) and a face plate (102), wherein a housing cavity (105) for housing the acoustic wave interferometer (101) is formed between the back plate (103) and the face plate (102); The acoustic wave interferometer (101) comprises a bottom plate, on which an acoustic wave interference device is arranged, the acoustic wave interference device being composed of acoustic wave diffusion units arranged with different periodicities, the acoustic wave diffusion units arranged with different periodicities comprising a first acoustic wave diffusion unit with a periodicity of 7, a second acoustic wave diffusion unit with a periodicity of 11, and a third acoustic wave diffusion unit with a periodicity of 13; The sound wave diffusion unit with different periodic arrangements is composed of a group of acoustic element blocks (C1) arranged according to a two-dimensional quadratic remainder law, and the acoustic element blocks (C1) form a two-dimensional well-shaped structure with different depths, thereby changing the sound absorption frequency of the sound wave diffusion unit; the top of the back plate and the panel is provided with a top seal (M1), the two sides of the back plate and the panel are provided with edge seals (M2), and the bottom of the back plate and the panel is provided with a bottom seal (M3); the back plate and the panel form a box-type outer frame unit through the top seal (M1), the edge seal (M2) and the bottom seal (M3); The boundary of the sound wave diffusion unit is X ∈[0, i ], Y ∈[0, i ], X is the transverse coordinate of the sound diffusion unit, Y is the longitudinal coordinate of the sound wave diffusion unit; X i Y i is the height coefficient of the coordinate.

2. The unit plate type sound barrier interferometer according to claim 1, characterized in that: At least one drainage hole is provided at the bottom of the back plate (103), and the shape of the drainage hole is one of a circle, a waist or a rectangle.

3. The unit plate type sound barrier interferometer according to claim 1, characterized in that: The panel (102) is a perforated plate or a micro-perforated plate, the perforation rate of the perforated plate does not exceed 28%, and the perforation rate of the micro-perforated plate does not exceed 10%.

4. The unit plate type sound barrier interferometer according to claim 1, characterized in that: The acoustic element block (C1) is made of at least one of aeolian sand, river sand, and perlite bonded together by a gel solvent.

5. The unit plate type sound barrier interferometer according to claim 1, characterized in that: The acoustic wave interferometer (101) is fixed in the accommodating cavity via at least two support members (104); the support members are at least one of U-shaped aluminum members or U-shaped steel structural members; the support members are fixed to the back plate via fixing members, and have a width of 30 mm to 70 mm.

6. The unit plate type sound barrier interferometer according to claim 1, characterized in that: The vertical cross-section of the acoustic element block is square, with a width ranging from 50 mm to 100 mm and a height ranging from 20 mm to 120 mm.

7. A unit plate type sound barrier, characterized by: Comprising the interferometer according to any one of claims 1-6.

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