Soundproof wall assembly with at least one acoustic scatterer

Abstract

A sound baffle assembly includes a plurality of walls defining a space between the walls. At least one acoustic scatterer is disposed within the space between the walls. The at least one acoustic scatterer has an opening and at least one channel. The at least one channel has a channel open end and a channel terminal end, wherein the channel open end is in fluid communication with the opening.

Description

Technical Field

[0001] This disclosure generally relates to sound barrier assemblies, and more specifically, to sound barrier assemblies comprising at least one acoustic scatterer. Background Technology

[0002] The background description provided generally presents the background of this disclosure. The inventors’ work (to the extent that it may be described in this background section) and descriptions that may otherwise not conform to the prior art at the time of filing are neither explicitly nor implicitly considered to be prior art to this invention.

[0003] The interior of a building, which may consist of one or more rooms, may experience noise pollution from both inside and outside the building. For example, if the building is located near a street, rooms within the building may experience unwanted noise, such as noise generated by vehicles, pedestrians, trains, and so on. Additionally, in some cases, unwanted noise may be generated within the building itself. For instance, people in one room may be talking loudly, causing unwanted noise to enter another room.

[0004] When constructing buildings and / or rooms within buildings, existing technologies typically rely on highly reflective materials that reflect sound or porous materials that absorb sound. However, both have drawbacks. For example, the performance of reflective materials is generally limited by the "mass-law," while porous materials do not provide high sound insulation. The mass-law states that doubling the mass per unit area increases the sound transmission loss (STL) by 6 dB. Similarly, doubling the frequency increases the sound transmission loss by 6 dB. This effect makes it difficult to use lightweight materials to isolate low-frequency sounds.

[0005] Regarding porous materials, traditional porous sound-absorbing materials are only effective at reducing high-frequency (greater than 1 kHz) noise due to their high impedance characteristics. If the material's microstructure has a large porosity, sound propagation through the porous material will be higher. Summary of the Invention

[0006] This section provides a general overview of the contents of this disclosure and is not a complete disclosure of its full scope or all its features.

[0007] In one example, a soundproof wall assembly includes a plurality of walls defining a space between them. At least one acoustic diffuser is disposed within the space between the plurality of walls. The at least one acoustic diffuser has an opening and at least one channel. The at least one channel has a channel opening end and a channel terminal end, wherein the channel opening end is in fluid communication with the opening.

[0008] The at least one acoustic diffuser used within the soundproof wall assembly can take any of a variety of different forms. In one example, the at least one acoustic diffuser is in the form of a semi-diffuser and is attached to one of the plurality of walls. In another example, the at least one acoustic diffuser is in the form of a degenerative diffuser located away from the plurality of walls.

[0009] In another example, the aforementioned soundproof wall assembly may also include porous material located within the space between the plurality of walls. By utilizing porous material in addition to the at least one acoustic diffuser, high-frequency and low-frequency noise can be effectively reduced.

[0010] Based on the provided description, further areas of application and various methods for enhancing the disclosed technology will become apparent. The descriptions and specific examples in this invention are merely illustrative and not intended to limit the scope of this disclosure. Attached Figure Description

[0011] This teaching will be more fully understood based on the detailed description and accompanying drawings, in which:

[0012] Figure 1A and 1B This illustrates two different applications of soundproof wall components;

[0013] Figure 2 An example of a soundproof wall assembly utilizing a semi-scattering body is shown;

[0014] Figure 3A and 3B Shown in Figure 2 Detailed views of different examples of semi-scattering bodies used in soundproof wall components;

[0015] Figure 4 Another example of a soundproof wall assembly utilizing a semi-scattering body is shown, which also utilizes a porous material;

[0016] Figure 5 An example of a soundproof wall assembly utilizing a degenerate scatterer is shown;

[0017] Figure 6A and 6B Shown in Figure 5 Detailed views of different examples of degenerative scatterers used in soundproof wall components; and

[0018] Figure 7 Another example of a soundproof wall assembly utilizing a degenerative scatterer is shown, which also utilizes a porous material.

[0019] To illustrate certain aspects, the accompanying drawings are intended to demonstrate the general features of the apparatus of the present technology. These drawings may not precisely reflect the features of any given aspect and are not necessarily intended to define or limit specific embodiments within the scope of the present technology. Furthermore, certain aspects may comprise combinations of features from the drawings. Detailed Implementation

[0020] This teaching provides a soundproof wall assembly that can be used in a variety of applications, such as for room walls or as a duct to guide air from one location to another. Regardless of the application, the acoustic wall assembly reduces unwanted noise.

[0021] The soundproof wall assembly may be made of multiple walls, such as four walls, defining a space between them. At least one acoustic scatterer is located within the space between the walls. In one example, the acoustic scatterer may be a semi-scatterer attached to one of the multiple walls. In another example, the acoustic scatterer may be in the form of a degenerative scatterer, which is located within the space between the multiple walls but typically does not physically contact the multiple walls.

[0022] As will be explained later in this specification, the acoustic scatterers located in the space between the walls can typically absorb low-frequency noise entering the walls. Furthermore, the soundproof wall assembly essentially breaks the "mass law" near the resonant frequency of the acoustic scatterers. At the resonant frequency, the effective mass density of the soundproof wall assembly becomes negative, thus making the speed of sound and the wavenumber in the material imaginary. An imaginary wavenumber indicates that the wave decays exponentially in the material. Moreover, the impedance of the material matches that of air at the same frequency, so there is no reflection. As a result, all the energy can be absorbed, and therefore, within a certain frequency band, the sound propagation loss exceeds the mass law.

[0023] As previously mentioned, the acoustic diffusers located within the sound barrier assembly are adept at absorbing low-frequency sounds. In one example of the sound barrier assembly, a porous material may be deposited within the space defined by the plurality of walls. Therefore, by utilizing the acoustic diffusers and porous material within the space between the walls, the sound barrier assembly can absorb sound entering the wall across a frequency range including both high and low frequencies.

[0024] refer to Figure 1A The image shows room 1. In this example, room 1 is in the form of a bedroom, but it can be any type of room located within a building. Thus, room 1 can be a warehouse space, manufacturing space, office, kitchen, living room, dining room, bathroom, etc. In this example, room 1 contains multiple walls. At least one of the walls 3 can be constructed using a soundproof wall assembly 10A.

[0025] The soundproof wall assembly 10A can be used in any of a variety of different applications. In this example, the soundproof wall assembly 10A is shown in the form of a wall, which can be used to define a room within a building or can be used in one or more exterior walls of a building. Thus, as will be described later in this specification, the soundproof wall assembly 10A reduces unwanted noise entering or leaving room 1.

[0026] Other applications are also possible. For example, the movement of air through a duct may cause unwanted low-frequency noise. Thus, reference... Figure 1B This example illustrates the use of a soundproof wall assembly 10B, which serves as an air duct 4 that allows air to move from one location to another and can direct air to a vent 5, which can then distribute the air into a room or other locations. Similarly, it should be understood that... Figure 1A and 1B The example shown is just one of many applications of the soundproof wall components described in this specification.

[0027] refer to Figure 2 An example of a soundproof wall assembly 10 is shown, the example typically along... Figure 1A and 1B Line 2-2 is cut off. Here, the soundproof wall assembly 10 typically includes multiple walls 11. The multiple walls 11 typically define a space 20 located between the multiple walls 11.

[0028] The plurality of walls 11 may comprise two or more walls. In this example, the plurality of walls 11 includes a first wall 12. The first wall 12 may have a first surface 22 and a second surface 24 located on opposite sides of the first wall 12. The first surface 22 may typically face the space 20 defined by the plurality of walls 11. The first wall 12 may be made of an acoustically rigid material, such as plastic, metal, glass, concrete, etc.

[0029] The plurality of walls 11 may also include a second wall 14, which is typically opposite to the first wall 12. In this example, the second wall 14 does not necessarily need to be made of an acoustically rigid material. However, there is no limitation on the second wall 14 also being made of an acoustically rigid material similar to the material used to manufacture the first wall 12.

[0030] The plurality of walls 11 may also include a third wall 16 and a fourth wall 18. The third wall 16 and the fourth wall 18 may be located at opposite ends of the first wall 12 and the second wall 14. In one example, the third wall 16 and the fourth wall 18 are connected to the first wall 12 and the second wall 14. By connecting the third wall 16 and the fourth wall 18 to the first wall 12 and the second wall 14, a space 20 is defined between the plurality of walls 11. In one example, the space 20 may be in the form of a cuboid. However, it should be understood that the space 20 may take any of many different shapes.

[0031] The walls 12-18 constituting the plurality of walls 11 can be made of similar materials and can be connected to each other in any of a variety of different ways. For example, the walls 12-18 can be connected to each other using any of a variety of mechanical means, such as nails, screws, bolts, etc., or they can be adhered to each other. Furthermore, the walls 12-18 can be made from a single integral structure.

[0032] Located within the space 20 defined by a plurality of walls 11 are a plurality of semi-scatterers 26. The plurality of semi-scatterers 26 may be attached to a first wall 12. Typically, the plurality of semi-scatterers 26 should be attached to a wall made of an acoustically rigid material, such as the first wall 12.

[0033] Multiple semi-scatterers 26 can be arranged in an array. The semi-scatterers 26 are spaced apart by a distance d. It should be understood that the semi-scatterers 26 and the first wall 12 can be a monolithic structure, or the semi-scatterers 26 can be attached to the first wall 12 using one of several different methods. In one example, the semi-scatterers 26 can be adhered to the first wall 12 using an adhesive, but other types of methods can also be used to attach the semi-scatterers 26 to the first wall 12, such as mechanical devices like screws, bolts, clips, etc. Alternatively, as previously stated, the semi-scatterers 26 and the first wall 12 can be formed as a monolithic structure. The semi-scatterers 26 can be made of acoustically rigid materials, such as concrete, metal, glass, wood, plastic, combinations thereof, etc. In one example, the semi-scatterers 26 can be made of the same material as the first wall 12.

[0034] Each semi-scatterer 26 has a resonant frequency. The resonant frequency of each semi-scatterer 26 can be the same or can be different. As will be explained later, the sound absorbed by the sound barrier assembly 10 is approximately matched with the resonant frequency of the semi-scatterer 26. By utilizing acoustic scatterers with different resonant frequencies, the sound barrier assembly 10 can absorb a wider range of sounds with different frequencies.

[0035] In this example, a total of eight half-scatterers 26 are attached to the first wall 12. However, it should be understood that any number of half-scatterers 26 can be used. In some examples, only one half-scatterer 26 can be used, while in other examples, multiple half-scatterers 26 can be used.

[0036] The projected sound 21 (which may also be referred to as noise) can originate from any one or a combination of several different sources. For example, the source of the projected sound 21 can be a loudspeaker, a vehicle, an airplane, a ship, a train, etc. Similarly, it should be understood that the sound barrier assembly 10 can be used in any situation where it is desired to eliminate or reduce sound at certain frequencies. The angle of incidence of the sound waves (such as the projected sound 21) absorbed by the sound barrier assembly 10 varies based on the distance d between the plurality of semi-scatterers 26.

[0037] The projected sound 21 is reflected at least partially by the first wall 12 without any phase change. The semi-scatterer 26 behaves like a monopole source at a distance from the first wall 12, and its mirror image also radiates a monopole moment. The two monopoles form a new plane wave, which is reflected directly from the first wall 12 with a 180° phase difference. Thus, the wave reflected by the first wall 12 is essentially canceled out by the new plane wave, thereby absorbing the projected sound 21.

[0038] The absorption performance of the sound barrier assembly 10 may depend on the incident angle. The sound barrier assembly 10 and the semi-scatterers 26 disclosed in this disclosure operate over a relatively wide incident range. Complete absorption can still be achieved for incident angles of 30 degrees and 45 degrees. However, as the incident angle increases, higher-order diffraction modes begin to propagate. This phenomenon alters the absorption performance. When higher-order diffraction modes are present at the resonant frequency of the scatterers, and the incident angle is sufficiently large, the sound barrier assembly 10 may therefore fail to achieve complete absorption. The disclosed design is adjustable to allow for a reduction in the spacing between the semi-scatterers 26, and thus an increase in the operating angle.

[0039] Another advantage of the acoustic scatterer design disclosed herein is that the semi-scatterers 26 are separated from each other, so sufficient space exists to combine one design with another to cover a wider range of frequencies. For example, semi-scatterers 26 with different resonant frequencies can be used to absorb and improve sound propagation losses over a wider frequency range. The resonant frequencies are tuned by adjusting the dimensions of the semi-scatterers 26 and the channels and / or cavities, as well as the width and length of the air channels. Therefore, different acoustic scatterer designs can be combined to achieve broadband performance.

[0040] The spacing between the semi-scatterers 26 of the sound barrier assembly 10 can be adjusted. The advantage of adjustable spacing is that it allows selection between material sparsity and operating angle. By reducing the space, the performance of the sound barrier assembly 10 will be less sensitive to the wave incident angle.

[0041] Figure 2 The semi-scatterer 26 can take any of several different forms. For example, Figure 3A A cross-sectional view of an example of a semi-scatterer 26A is shown. This is merely an example of the design of the semi-scatterer 26A. Here, the semi-scatterer 26A is typically semi-cylindrical in shape. The semi-cylindrical shape of the semi-scatterer 26A comprises a generally semi-circular portion 42A and a generally flat portion 44A. The generally flat portion 44A can be attached to... Figure 2 The first surface 22 of the first wall 12 shown. Additionally, as previously stated, Figure 2 The semi-scattering body 26A and the first wall 12 shown can be an integral structure, or they can be connected to each other using the aforementioned method. It should be understood that the semi-circular portion 42A can take any of several different shapes. These shapes can be non-planar, but any suitable shape can be utilized.

[0042] The semi-scatterer 26A can be made of any of several different materials. As before, the semi-scatterer 26A can be made of acoustically rigid materials such as concrete, metal, glass, wood, plastic, or combinations thereof. In one example, the semi-scatterer 26A can be made of the same material as the first wall 12.

[0043] The overall shape of the semi-scatterer 26A can be generally consistent along its length. In this example, the semi-scatterer 26A may include a first channel 48A having an open end 52A and a terminal 56A. The semi-scatterer 26A may also include a second channel 50A having an open end 54A and a terminal 58A. The open ends 52A and 54A may be in fluid communication with an opening 60A formed on a semi-circular portion 42A of the semi-scatterer 26A. The opening 60A may be directly adjacent to the open ends 52A and / or 54A. The opening 60A may be adjacent to the line of symmetry 41A of the semi-scatterer 26A. As for the terminals 56A and 58A, these ends are separate from each other and are not in fluid communication with each other. The terminals 56A and 58A may terminate in any of several different shapes. Moreover, the terminals 56A and 58A may terminate in the form of a chamber or in the form of a closed channel.

[0044] Channels 48A and 50A may have a circular shape, which generally follows the circumference defined by the semi-circular portion 42A. The width of opening 60A may be approximately similar to the width of channels 48A and 50A. However, the width of the channels can vary significantly.

[0045] The semi-scatterer 26A may have a line of symmetry 41A. In this example, the shape of the first channel 48A is substantially a mirror image of the second channel 50A. Furthermore, the volumes of channels 48A and 50A may be approximately equal. "Substantially equal" in this disclosure should be understood to mean that the total volume or shape of channels 48A and 50A differs by approximately 10%. The resonant frequencies of channels 48A and 50A may be the same.

[0046] It should be understood that the number and shape of the channels can vary depending on the application. In the example described, the semi-scatterer 26A has two channels, 48A and 50A. However, more or fewer channels can be used. In the case of multiple channels, similar to the channels 48A and 50A shown, additional channels can have similar shapes to each other, with the same channel cross-sectional area and length, and the same cavity volume.

[0047] As mentioned above, Figure 2 The semi-scatterer 26 can take any of several different shapes. Figure 3B Another example of a semi-scatterer 26B is shown. Here, the semi-scatterer 26B includes a first channel 48B and a second channel 50B. The first and second channels 48B and 50B have open ends 52B and 54B, respectively. Furthermore, the first channel 48B and the second channel 50B have terminals 56B and 58B, respectively. The open ends 52B and 54B of the first channel 48B and the second channel 50B may be in fluid communication with an opening 60B typically formed on the outer circumference 42B of the semi-scatterer 26B. The opening 60B may be adjacent to the line of symmetry 41B of the semi-scatterer 26B. The terminals 56B and 58B may be in the form of chambers or may be in the form of closed channels.

[0048] As before, the flat side 44B can be attached to the first surface 22 of the first wall 12 by any of the several different methods mentioned. Additionally, as previously stated, the semi-scatterer 26B and the first wall 12 can be an integral structure.

[0049] In this example, the first channel 48B is essentially a zigzag channel. Furthermore, the first channel 48B includes a first channel portion 49B and a second channel portion 57B, which are generally parallel to each other and may have similar arcs. The second channel 50B is similar, as it has a first channel portion 51B and a second channel portion 53B, which are generally parallel to each other and may have similar arcs. However, any of several different designs can be utilized.

[0050] The semi-scatterer 26B can also have a line of symmetry 41B. In this way, the first channel 48B can be essentially a mirror image of the second channel 50B. Similarly, the volume of the first channel 48B can be approximately equal to the volume of the second channel 50B.

[0051] refer to Figure 4 This shows another example of a soundproof wall assembly 110. Figure 4 The sound insulation wall component 110 and Figure 3A The soundproof wall assembly 10 has some similarities. Thus, the same reference numerals are used to refer to the same elements, and the previous description of these elements also applies here.

[0052] As before, the soundproof wall assembly 110 includes a plurality of walls 11. In this example, the plurality of walls 11 includes a first wall 12, a second wall 14, a third wall 16, and a fourth wall 18. Additionally, as before, a plurality of semi-scatterers 26 are attached to a first surface 22 of the first wall 12, generally facing the space 20 defined by the plurality of walls 11.

[0053] As previously mentioned, the semi-scatterer 26 is generally very good at absorbing lower frequency sounds. Porous materials, such as foam, are generally better at absorbing higher frequency sounds. Thus, the soundproof wall assembly 110 also includes a porous material 28 located within a space 20 defined by a plurality of walls 11. The porous material 28 may contain channels, crevices, and / or cavities that allow sound waves to enter the porous material 28. Sound energy is dissipated by heat loss caused by friction of air molecules within the porous material 28. As shown, the porous material 28 may occupy a portion or all of the space 20.

[0054] The porous material 28 can be made of any type of sound-absorbing material or a combination thereof, such as foam, rock wool, glass wool, recycled foam and / or mesh fiber materials, such as aluminum rigid frame porous materials, ceramics and polymers. In this way, by utilizing both the semi-scatterer 26 and the porous material 28, the soundproof wall assembly 110 can reduce unwanted noise over a wide frequency range.

[0055] refer to Figure 5 This shows another example of a soundproof wall assembly 210. (Compared to...) Figure 3A Like the soundproof wall assembly 10, the soundproof wall assembly 210 includes a plurality of walls 111. The plurality of walls 111 includes a first wall 112, a second wall 114, a third wall 116, and a fourth wall 118. As before, the first wall 112 may face the second wall 114, and the third wall 116 may face the fourth wall 118. The plurality of walls 111 define a space 120 between them. In this example, the third wall 116 and the fourth wall 118 may be made of an acoustically rigid material, while the first wall 112 and the second wall 114 may be made of an acoustically softer material.

[0056] Multiple walls 111 can be connected to each other using various different methods. In this example, the third wall 116 and the fourth wall 118 are independently connected to the first wall 112 and the second wall 114, respectively. These walls can be connected using any of a variety of different connection methods, such as adhesives, nails, screws, bolts, combinations thereof, etc. Furthermore, the multiple walls 11 can be made from a single, integral structure.

[0057] Located within space 20 are multiple degenerative scatterers 126, which are spaced 125 apart from each other. It should be noted that the degenerative scatterers 126 closest to the third wall 116 and the fourth wall 118 are also spaced a similar distance 125 from them. In this example, four degenerative scatterers 126 are shown. However, it should be understood that any number of degenerative scatterers 126 can be used.

[0058] The distances 125 between each degenerate scatterer 126 and / or between the degenerate scatterer 126 at the ends of the row of degenerate scatterers and the third wall 116 or the fourth wall 118 are approximately equal. "Approximately equal" means that the distance 125 can vary by up to 10%. For optimal sound absorption within the walls, the total number of degenerate scatterers 126 in the array is typically determined based on the distance between the third wall 116 and the fourth wall 118. The minimum total number N of acoustic scatterers required for the application can be expressed as follows:

[0059] N = D / (c / f),

[0060] Where D is the distance between the third wall 116 and the fourth wall 118, c is the speed of sound in the air, and f is the resonant frequency of the monopole response and the dipole response.

[0061] The rotational direction of the degenerative scatterer 126 relative to the sound 121 does not affect the ability of the degenerative scatterer 126 to absorb sound at the resonant frequency.

[0062] The degenerate scatterer 126 can exhibit both acoustic monopole and acoustic dipole responses. Acoustic monopoles radiate sound waves in all directions. The radiation pattern of a monopole typically does not exhibit angle dependence for the magnitude and phase of the sound pressure. The radiation of an acoustic dipole, however, is angle-dependent. iθ , where θ is the polar angle in 2D. Along two opposite radiation directions, at the same distance, the pressure fields have the same magnitude and opposite phase. A monopole response corresponds to sound radiated from a pulsating cylinder that expands and contracts sinusoidally with its radius. A dipole response corresponds to sound radiated from two pulsating cylinders spaced a small distance apart; the two pulsating cylinders radiate sound with the same intensity and opposite phase.

[0063] The acoustic dipole and acoustic monopole responses of the degenerative scatterer 126 can have substantially similar resonant frequencies. As before, the term "substantially similar" regarding resonant frequencies should be understood to mean that the resonant frequencies can differ by about 10% or less. The degenerative scatterer 126 typically has a housing 127 defining the overall shape of the degenerative scatterer 126. Typically, the housing 127 can be symmetrical in width. However, the housing 127 can take any of a variety of different shapes.

[0064] refer to Figures 6A-6B Cross-sections of different examples of degenerate scatterers 126A and 126B are shown. It should be understood that... Figure 6A and 6B The different designs of the degenerative scatterers 126A and 126B shown are merely examples. The degenerative scatterer 126 can take any of a variety of different designs, not just those shown and described in this disclosure. Each of the degenerative scatterers 126A and 126B can have housings 127A and 127B whose shapes are generally symmetrical along the width of the housings 127A and 127B. Each housing 127A and 127B typically defines a perimeter 128A-128D. The generally symmetrical shape along the width of the housings 127A and 127B can be a generally circular shape as shown. However, it should be understood that any of a variety of different shapes can be utilized.

[0065] Degenerative scatterers 126A and 126B can have multiple channels. For example, degenerative scatterer 126A has four channels: 130A, 132A, 134A, and 136A. Thus, Figure 6A The degenerative scatterer 126A is a four-channel degenerative scatterer. Figure 6B The degenerate scatterer 126B has six channels: 130B, 132B, 134B, 136B, 138B, and 139B. Thus, Figure 6B The degenerative scatterer 126B is a six-channel degenerative scatterer. It should be understood that any of the multiple channels can be used in the degenerative scatterers 126A and / or 126B. However, as will be explained later, three or more channels allow the degenerative scatterers 126A and / or 126B to be equally effective, regardless of their rotational positioning.

[0066] As previously described, the degenerative scatterer 126A is a four-channel degenerative scatterer and therefore has four channels 130A, 132A, 134A, and 136A. Each of the four channels 130A, 132A, 134A, and 136A has an open end 140A, 142A, 144A, and 146A adjacent to the outer periphery 128A, respectively. Additionally, each of the four channels 130A, 132A, 134A, and 136A has a terminal 150A, 152A, 154A, and 156A, respectively. The terminals 150A, 152A, 154A, and 156A may be located near the center 129A of the degenerative scatterer 126A. The terminals 150A, 152A, 154A, and 156A may be separate from each other and may not be fluidly connected to each other.

[0067] The volumes of channels 130A, 132A, 134A, and 136A can be approximately equal to each other. In addition, the overall shape of channels 130A, 132A, 134A, and 136A across the width of the degenerate scatterer 126A can be approximately similar in shape and / or design.

[0068] Regarding the design of channels 130A, 132A, 134A, and 136A, the channels can have a generally zigzag shape. For example, regarding channel 132A, the channel can have a zigzag shape, wherein one portion 133A of channel 132A extends partially or substantially parallel to another portion 135A of channel 132A. However, it should be understood that the channel design can vary considerably and does not necessarily have to be a zigzag design. Additionally, as... Figure 6A As shown in the example, this precise type of design allows one part of the channel to extend approximately parallel to another part of the channel.

[0069] Turning our attention to the degenerative scatterer 126B, as previously described, the degenerative scatterer 126B is a six-channel degenerative scatterer and therefore comprises channels 130B, 132B, 134B, 136B, 138B, and 139B. Each of the six channels 130B, 132B, 134B, 136B, 138B, and 139B has an open end 140B, 142B, 144B, 146B, 148B, and 149B respectively adjacent to the outer periphery 128B. Additionally, each of the six channels 130B, 132B, 134B, 136B, 138B, and 139B has a terminal 150B, 152B, 154B, 156B, 158B, and 159B respectively. Terminals 150B, 152B, 154B, 156B, 158B, and 159B may be located near the center 129B of the degenerated scatterer 126B. Terminals 150B, 152B, 154B, 156B, 158B, and 159B may be separate from each other and may not be in fluid communication with each other.

[0070] The volumes of channels 130B, 132B, 134B, 136B, 138B, and 139B can be approximately equal to each other. Furthermore, the overall shape of the width of the transdegenerative scatterer 126B of channels 130B, 132B, 134B, 136B, 138B, and 139B can be approximately similar in shape and / or design.

[0071] Regarding the design of channels 130B, 132B, 134B, 134B, 136B, 138B, and 139B, the channels can have a generally zigzag shape. For example, regarding channel 130B, the channel can have a zigzag shape, wherein one portion 133B of channel 130B extends partially or substantially parallel to another portion 135B of channel 130B. However, it should be understood that the channel design can vary considerably and is not necessarily a zigzag design. Additionally, as... Figure 6B As shown in the example, this precise type of design allows one part of the channel to extend approximately parallel to another part of the channel.

[0072] The degenerative diffusers 126A and / or 126B can be made from any of several different materials. For example, the degenerative diffusers 126A and / or 126B can be made from acoustically rigid materials such as plastics, silicon, glass, and / or metals.

[0073] refer to Figure 7 This shows another example of a soundproof wall assembly 310. Figure 7 The sound insulation wall component 310 and Figure 5 The soundproof wall assembly 210 has some similarities. Thus, the same reference numerals are used to refer to the same elements, and the previous description of these elements also applies here.

[0074] As before, the sound barrier assembly 310 includes a plurality of walls 111. In this example, the plurality of walls 111 includes a first wall 112, a second wall 114, a third wall 116, and a fourth wall 118. As previously mentioned, the degenerative diffuser 126 is generally very good at absorbing lower frequency sound. Porous materials, such as foam, are generally better at absorbing higher frequency sound. Thus, the sound barrier assembly 310 also includes a porous material 128 located within the space 120 defined by the plurality of walls 111. The porous material 128 may include channels, slits, and / or cavities that allow sound waves to enter the porous material 128. Sound energy is dissipated by heat loss caused by friction of air molecules within the porous material 128. As shown, the porous material 28 may occupy part or all of the space 20.

[0075] The porous material 128 can be made of any type of sound-absorbing material or a combination thereof, such as foam, rock wool, glass wool, recycled foam and / or mesh fiber materials, such as aluminum rigid frame porous materials, ceramics and polymers. In this way, by utilizing both the degenerative diffuser 126 and the porous material 128, the soundproof wall assembly 110 can reduce unwanted noise over a wide frequency range.

[0076] The foregoing description is illustrative in nature only and is not intended to limit this disclosure, its application, or its uses. When used herein, the phrase "at least one of A, B, and C" should be interpreted as indicating its logical coherence (A or B or C) using the non-exclusive logic "OR". It should be understood that the individual steps in the method can be performed in different orders without altering the principles of this disclosure. Disclosure of scope includes disclosure of all scopes and subdivisions within the entire scope.

[0077] The headings (such as "Background Art" and "Summary of the Invention") and subheadings used herein are merely for the general organization of the subject matter within this disclosure and are not intended to limit the disclosure of this technology or any aspect thereof. The description of multiple embodiments having the described features is not intended to exclude other embodiments having additional features, or other embodiments comprising different combinations of the described features.

[0078] When used herein, the terms “comprising” and “including” and variations thereof are intended to be non-limiting, such that a description of consecutive items or a list does not exclude other similar items that may also be useful in the apparatus and methods of the present technology. Similarly, the terms “may” and “capable” and variations thereof are intended to be non-limiting, such that a description of an embodiment that may or may include certain elements or features does not exclude other embodiments of the present technology that do not include those elements or features.

[0079] The broad teachings of this disclosure can be implemented in various forms. Therefore, although this disclosure contains specific examples, its true scope should not be so limited, as other modifications will become apparent to those skilled in the art after studying the specification and the appended claims. References to an aspect or aspect herein mean that a particular feature, structure, or characteristic described in connection with an embodiment or a particular system is included in at least one embodiment or aspect. The appearance of the phrase "in an aspect" (or variations thereof) does not necessarily refer to the same aspect or embodiment. It should also be understood that the various method steps discussed herein need not be performed in the same order as described, and not every method step is required in every aspect or embodiment.

[0080] The foregoing description of embodiments has been provided for illustrative and descriptive purposes. It is not intended to be exclusive or limiting of this disclosure. Various elements or features of a particular embodiment are generally not limited to that particular embodiment, but are interchangeable where applicable and can be used in selected embodiments, even if not specifically shown or described. The various elements and features may also be varied in many ways. Such variations should not be considered a departure from this disclosure, and all such modifications are included within the scope of this disclosure.

Claims

1. A soundproof wall assembly, comprising: Multiple walls, wherein the multiple walls define a space between the multiple walls; At least one acoustic diffuser located in the space between the plurality of walls; The at least one acoustic scatterer has an opening and at least one channel; as well as The at least one channel has a channel opening end and a channel terminal end, and the channel opening end is in fluid communication with the opening; The at least one acoustic diffuser is connected to one of two opposing walls among the plurality of walls, and the opening faces the space between the plurality of walls and faces the other of the two opposing walls; The at least one acoustic scatterer has a flat side connected to one of two opposing walls of the plurality of walls; the at least one acoustic scatterer has a non-planar side having the opening facing the space between the plurality of walls.

2. The soundproof wall assembly according to claim 1, further comprising a porous material disposed in the space between the plurality of walls.

3. The soundproof wall assembly according to claim 1, characterized in that, The at least one acoustic scatterer has a semi-cylindrical shape, which defines the non-planar side and the flat side.

4. The soundproof wall assembly according to claim 1, characterized in that, The acoustic scatterer is a plurality of acoustic scatterers.

5. The soundproof wall assembly according to claim 4, characterized in that, The plurality of acoustic scatterers includes a first scatterer having a first resonant frequency and a second scatterer having a second resonant frequency.

6. The soundproof wall assembly according to claim 1, characterized in that, The sound barrier assembly is configured to absorb sound waves of a specific frequency generated by a noise source, wherein the specific frequency is similar to the resonant frequency of the at least one acoustic scatterer.

7. The soundproof wall assembly according to claim 1, characterized in that: The at least one channel includes a first channel and a second channel; The first channel has a first channel opening end and a first channel terminal end, and the first channel opening end is in fluid communication with the opening end; The second channel has a second channel opening and a second channel terminal, and the second channel opening is in fluid communication with the opening; as well as The first channel terminal and the second channel terminal are separate from each other.

8. The soundproof wall assembly according to claim 1, characterized in that: The at least one acoustic scatterer is at least one degenerative scatterer having multiple channels, each of the multiple channels having an open end and an end, and the ends of the multiple channels being separated from each other; as well as The at least one degenerate scatterer has an acoustic monopole response and an acoustic dipole response, wherein the acoustic dipole response and the acoustic monopole response of the at least one degenerate scatterer have similar resonant frequencies.

9. The soundproof wall assembly according to claim 8, characterized in that, The plurality of channels includes at least three channels.

10. The soundproof wall assembly according to claim 8, characterized in that, The plurality of channels includes at least four channels.

11. The soundproof wall assembly according to claim 8, characterized in that, Each of the multiple channels has a similar volume.

12. The soundproof wall assembly according to claim 8, characterized in that, A symmetrical shape having at least one line of symmetry is defined by a cross-section along the width of the at least one degenerate scatterer, the symmetrical shape having an outer periphery, wherein the opening ends of the plurality of channels are adjacent to the outer periphery.

13. The soundproof wall assembly according to claim 8, further comprising: Multiple degenerate scatterers forming a degenerate acoustic scatterer array. The plurality of walls includes a first wall and a second wall, with the first wall facing the second wall; The degenerative acoustic scatterer array is located between the first wall and the second wall, wherein the degenerative acoustic scatterer array comprises N acoustic scatterers; The number N of the plurality of degenerate scatterers is: ;as well as Where D is the distance between the first wall and the second wall, c is the speed of sound in air, and f is the resonant frequency of the acoustic monopole response and the acoustic dipole response.

14. The soundproof wall assembly of claim 1, wherein the plurality of walls comprises: The first wall, the second wall, the third wall, and the fourth wall; The first wall faces the second wall, and the first wall and the second wall are connected to the third wall and the fourth wall; as well as The third wall faces the fourth wall.

15. The soundproof wall assembly according to claim 1, characterized in that, The space between the multiple walls is rectangular.

16. The soundproof wall assembly according to claim 1, characterized in that, The plurality of walls are the walls of a duct structure used to guide the movement of air.

17. The soundproof wall assembly according to claim 1, characterized in that, The soundproof wall assembly is configured to be used as a wall in a building structure.

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