Sound absorbing structure and device

Abstract

The application provides a sound absorption structure and device. The sound absorption structure comprises: a body having a sound wave incidence surface; a plurality of partitions, at least part of the partitions being arranged in the body in a first direction parallel to the sound wave incidence surface, and at least part of the partitions being arranged in the body in a second direction parallel to the sound wave incidence surface, the first direction intersecting the second direction; and a plurality of partitions and the body enclosing a plurality of resonance cavities, the resonance cavities being configured to absorb sound waves by resonance; wherein at least one of the resonance cavities is bendable; and when bent, the length of the at least one resonance cavity in the first direction and / or the second direction changes. The above sound absorption structure can better adapt to different curved surfaces by configuring the bendable resonance cavities, thereby saving a large amount of installation space and greatly widening the application scenarios and application range of the sound absorption structure.

Description

Technical Field

[0001] This invention relates to the field of sound absorption technology, and in particular to a sound absorption structure and device. Background Technology

[0002] Noise pollution is one of the three major pollutants in the world today. With the development of society, the impact of noise on human society is becoming increasingly serious. Traditional sound-absorbing materials have a significant effect on suppressing noise in the mid and high frequency ranges, but their effect on large-wavelength low-frequency noise is very limited.

[0003] Acoustic metamaterials are artificial composite structural materials possessing extraordinary acoustic properties not found in natural materials (such as excellent absorption of mid-to-low frequency noise, ultra-thin thickness, and wide controllable frequency band). Their unique acoustic properties depend on artificial functional units that can be freely designed according to the noise spectrum characteristics. Among these, sound-absorbing metamaterials have received considerable attention, and various structural forms have been developed, such as Helmholtz type, hybrid resonators type, and FP type.

[0004] These structures are effective at absorbing low-frequency noise and have highly customizable internal structures. However, the structure of the sound absorber is relatively simple, usually a rectangular sound-absorbing plate. However, there are significant problems with matching rectangular plates with noisy environments. When the wall surface to which the sound-absorbing material needs to be attached is curved or the sound insulation device has an irregular shape, it is difficult for the rectangular sound-absorbing panel to fit the wall surface and device. Summary of the Invention

[0005] Based on this, the present invention aims to provide an improved sound-absorbing structure to enhance the fit between the sound-absorbing structure and complex surfaces.

[0006] In a first aspect, this application provides a sound-absorbing structure, comprising:

[0007] The body has a sound wave incident surface;

[0008] A plurality of spacers, at least some of which are spaced apart in the body along a first direction parallel to the sound wave incident surface, and at least some of which are spaced apart in the body along a second direction parallel to the sound wave incident surface, wherein the first direction and the second direction intersect.

[0009] The plurality of spacers and the body enclose a plurality of resonant cavities, which are configured to absorb sound waves through resonance.

[0010] Wherein, at least one of the resonant cavities is bendable; and, when bent, the length of at least one of the resonant cavities changes in the first direction and / or the second direction.

[0011] The aforementioned sound-absorbing structure effectively absorbs low-to-mid-frequency noise through its resonant cavities. It is environmentally friendly, pollution-free, and has good thermal conductivity, facilitating heat dissipation in indoor environments. Furthermore, the resonant frequencies of each cavity can be adjusted as needed according to its own parameters, thus enabling wider-bandwidth sound absorption. Moreover, since at least one resonant cavity in the sound-absorbing structure is bendable, and its length changes in the first and / or second directions during bending, the bendable resonant cavities allow the sound-absorbing structure to be well-fitted to different curved surfaces. Compared to traditional rectangular sound-absorbing flat panels, this saves significant installation space and greatly expands the application scenarios and scope of sound-absorbing structures in acoustic metamaterials.

[0012] In one embodiment, the sound-absorbing structure can be bent around a preset axis parallel to the sound wave incident surface, and the bent sound-absorbing structure has a sound wave incident surface with an arc-shaped profile, the central angle corresponding to the profile being in the range of -360° to 360°.

[0013] In one embodiment, the plurality of spacers includes a plurality of first spacers spaced apart along the first direction, the first spacers being configured to extend or retract by a preset length along the second direction under the action of a preset external force; and / or, the plurality of spacers includes a plurality of second spacers spaced apart along the second direction, the second spacers being configured to extend or retract by a preset length along the first direction under the action of a preset external force.

[0014] In one embodiment, the spacer includes at least one of a corrugated spacer and a sawtooth spacer.

[0015] In one embodiment, the distance between adjacent peaks or troughs of the spacer is less than or equal to a preset distance.

[0016] In one embodiment, at least some of the spacers spaced apart along the second direction are misaligned in the first direction.

[0017] In one embodiment, at least a portion of the spacer is made of a flexible material.

[0018] In one embodiment, the thickness of the sound-absorbing structure is less than or equal to 20 mm.

[0019] In one embodiment, the body has a first side and a second side disposed opposite to each other, the body comprising: a top plate disposed on the first side and connected to one end of the plurality of spacers, the top plate having a plurality of micropores; an insertion tube communicating with the micropores and extending to the second side; and a bottom plate disposed on the second side and connected to the other end of the plurality of spacers.

[0020] Secondly, this application provides an apparatus comprising: a housing; a sound source disposed in or within the housing; and a sound-absorbing structure as described above, wherein the sound-absorbing structure is disposed in or within the housing, and the sound wave incident surface of the sound-absorbing structure faces the sound source.

[0021] The aforementioned device can effectively absorb noise emitted by the sound source inside the device by setting the sound-absorbing structure as described above in the corresponding part of the housing or inside the housing, thereby helping to reduce or eliminate noise and make the device operate quietly and stably; at the same time, the aforementioned sound-absorbing structure can fit its installation part well, thereby greatly saving installation space and contributing to the miniaturization of the overall device. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram showing the structure of an embodiment of this application when it is not bent.

[0024] Figure 2 express Figure 1 The above-view schematic diagram of the embodiment is shown.

[0025] Figure 3 express Figure 2 A schematic diagram of the cross-section of surface AA;

[0026] Figure 4 This is a schematic diagram showing the structure during bending according to an embodiment of this application;

[0027] Figure 5 express Figure 4 The illustrated embodiment shows structural diagrams when bent at 45° and -45°.

[0028] Figure 6 express Figure 4 The illustrated embodiment shows structural diagrams when bent at 90° and -90°.

[0029] Figure 7 express Figure 4 The illustrated embodiment shows structural diagrams when bent at 360° and -360°.

[0030] Figure 8 express Figure 4 The illustrated embodiment shows the sound absorption coefficient as a function of frequency when the element is not bent, bent at 45 degrees, and bent at 90 degrees.

[0031] Component designation explanation:

[0032] 100. Sound-absorbing structure; 110. Body; 111. Top plate; 1110. Micropores; 112. Bottom plate; 113. Insert tube; 120. Spacer; 121. First spacer; 122. Second spacer.

[0033] P, the surface into which the sound wave enters; Q, the resonant cavity. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] Traditional metamaterial sound-absorbing panels are rectangular rigid bodies, and the walls of their resonant cavities are usually composed of intersecting straight partitions, making it difficult to bend the sound-absorbing panels. However, when installing sound-absorbing panels, if the wall surface is curved or the noise source is irregularly shaped, it is difficult for rigid sound-absorbing panels to completely cover the wall surface or enclose the noise source for effective sound absorption and insulation without occupying too much space.

[0039] In summary, traditional metamaterial sound-absorbing flat panels have poor bending performance, meaning they have poor compatibility with curved surfaces, which can easily lead to large space requirements and limited applicability.

[0040] To address the aforementioned problems, this application proposes a sound-absorbing structure with bending properties. This sound-absorbing structure can be applied to straight walls, curved walls, corners, regular or irregular surfaces of devices, etc. By bending the sound-absorbing structure into different shapes, it can effectively cover the sound source, thereby effectively absorbing and isolating noise.

[0041] like Figures 1 to 4 As shown, the sound-absorbing structure 100 of this application includes a body 110 and a plurality of spacers 120 disposed within the body 110.

[0042] Among them, such as Figure 4 As shown, the body 110 has a sound wave incident surface P, which can be configured to face the sound source so that sound waves enter the sound-absorbing structure 100 through the sound wave incident surface P and are absorbed. It should be noted that, for ease of demonstration of the internal structure, Figure 4 Part of the surface of the body 110 of the sound-absorbing structure 100 is hidden.

[0043] Furthermore, such as Figure 2 and Figure 3As shown, at least some of the spacers 120 are spaced apart within the body 110 along a first direction D1 parallel to the sound wave incident surface, and at least some of the spacers 120 are spaced apart within the body 110 along a second direction D2 parallel to the sound wave incident surface. The first direction D1 and the second direction D2 intersect, and the included angle between the first direction D1 and the second direction D2 can be 0° to 180°. Thus, the two intersecting spacers 120 can enclose the body 110 to form multiple resonant cavities Q, which are configured to absorb sound waves through resonance. Optionally, each spacer 120 is tightly connected to the body 110, making each resonant cavity Q independent of each other. Optionally, each spacer 120 can be glued or welded to the body 110 to ensure the stability of the connection. Specifically, sound waves enter the resonant cavity Q through the sound wave incident surface P. If the frequency of the sound wave is the same as the resonant frequency of the resonant cavity Q, the system will resonate, causing significant friction between the sound wave and the inner wall of the resonant cavity Q. The sound wave energy is converted into heat and dissipated. The resonant frequency of the resonant cavity Q can be determined by the structural parameters of the resonant cavity Q itself. For details, please refer to the relevant design principles of Helmholtz type, hybrid resonators type and FP type resonant cavities in acoustic metamaterials.

[0044] Furthermore, at least one resonant cavity Q is bendable; and during bending, the length of at least one resonant cavity Q changes in the first direction D1 and / or the second direction D2. The term "bendable" in this application means that the resonant cavity Q can be bent under external force without causing damage to the resonant cavity Q (such as breakage or cracking of the spacer 120 or the body 110). The bendability is achieved through the material and structure of the resonant cavity Q itself. For example, the material of the resonant cavity Q can be flexible or elastic, and the structure of the resonant cavity Q can facilitate expansion, contraction, torsion, and bending during bending. These materials or structures can change the length of the resonant cavity Q in the first direction D1 and / or the second direction D2 (it can be a change in side length or a shortening) during bending, facilitating bending of the resonant cavity Q in at least one direction, thereby better meeting the bending requirements of the resonant cavity Q. It should be noted that the acoustic wave incident surface P of the body 110 also bends with the bending of the resonant cavity Q, while the first direction D1 and the second direction D2 remain parallel to the acoustic wave incident surface P.

[0045] The aforementioned sound-absorbing structure 100 can effectively absorb low- and mid-frequency noise through the resonant cavity Q. It is environmentally friendly and pollution-free, has good thermal conductivity, and facilitates heat dissipation in indoor environments. At the same time, the resonant frequency of each resonant cavity Q can be adjusted as needed according to its own parameters, which is conducive to achieving a wider frequency range of sound absorption. Furthermore, since at least one resonant cavity Q in the sound-absorbing structure 100 can be bent, and the length of the resonant cavity Q will also change in the first and / or second directions when bent, the sound-absorbing structure can be well adapted to different curved surfaces by configuring the bendable resonant cavity Q. Compared with the traditional rectangular sound-absorbing plate, it can save a lot of installation space and greatly expand the application scenarios and application range of the sound-absorbing structure 100.

[0046] On the other hand, the sound-absorbing structure 100 can be fixed to the wall or device surface by the keel, and absorb noise through the resonance system. This can eliminate the "standing wave" and "reverberation" effects inside the room or device, and also has sound insulation performance to prevent noise from spreading to the outside.

[0047] In some embodiments, the sound-absorbing structure 100 can be bent around a preset axis parallel to the sound wave incident surface P. The bent sound-absorbing structure 100 has a sound wave incident surface P with an arc-shaped outline. The value of the central angle corresponding to the outline is in the range of -360° to 360°. For ease of description, the central angle corresponding to the outline can be simply referred to as the bending angle of the sound-absorbing structure 100. In other words, after the sound-absorbing structure 100 is bent around a preset axis parallel to the sound wave incident surface P, it can have a bending angle in the range of -360° to 360°.

[0048] like Figures 5 to 7 As shown, the sound-absorbing structure 100 can be bent around one of its external axes, forming a structure with bending angles of ±45°, ±90°, and ±360°. It should be noted that, for easier viewing of the internal structure, Figures 5 to 7 The bottom surface opposite the sound wave incident surface P is concealed in all sound-absorbing structures 100. Specifically, when the bending angle is positive, the larger the bending angle, the smaller the area of ​​the sound wave incident surface P, resulting in better sound absorption. The corresponding resonant cavity volume also increases with stretching, thus shifting the overall sound absorption frequency of the sound-absorbing structure 100 towards lower frequencies. When the bending angle is negative, the larger the bending angle, the larger the area of ​​the sound wave incident surface P, resulting in slightly worse sound absorption. The corresponding resonant cavity volume decreases with compression, thus shifting the overall sound absorption frequency of the sound-absorbing structure 100 towards higher frequencies. By bending the sound-absorbing structure 100 into structures with different bending angles, it is beneficial to broaden the curvature adaptation range of the sound-absorbing structure 100, thereby better fitting the sound source surface. At the same time, positive and negative bending angles can be set according to actual sound absorption frequency requirements. It is understandable that traditional sound-absorbing materials can be used for the absorption of higher frequency sound waves, but if the thickness of the sound-absorbing material is to be reduced, a sound-absorbing structure with a negative bending angle 100 can still be selected.

[0049] In some implementations, such as Figures 2 to 4 As shown, the plurality of spacers 120 may include a plurality of first spacers 121 spaced apart along a first direction D1 parallel to the sound wave incident surface P, and a plurality of second spacers 122 spaced apart along a second direction D2 parallel to the sound wave incident surface P. The first spacers 121 are configured to expand and contract by a predetermined length along the second direction D2 under the action of a predetermined external force, and the second spacers 122 are configured to expand and contract by a predetermined length along the first direction D1 under the action of a predetermined external force. The expansion and contraction of the first spacers 121 and the second spacers 122 under the influence of external force can be linear or nonlinear. Optionally, in the nonlinear case, the first spacer 121 can be configured to be stretched by a tensile force of 5N to 100N for 2mm to 30mm, and the second spacer 122 can be configured to be stretched by a tensile force of 5N to 100N for 1mm to 25mm. The above numerical range can be adjusted according to the actual expansion and contraction requirements, and this application does not limit it. Optionally, in the linear case, the first spacer 121 and / or the second spacer 122 have a expansion and contraction coefficient, which can be obtained by the ratio of the change in the expansion and contraction length of the spacer to the change in the external force, so that the expansion and contraction of the spacer 120 can be easily controlled.

[0050] In traditional sound-absorbing flat panels, the partitions are usually straight. However, two intersecting straight partitions are difficult to stretch when bent, resulting in poor bending performance of the sound-absorbing flat panel. In this application, by setting the first partition 121 and / or the second partition 122 to be able to extend or retract by a preset length along the second direction D2 and / or the first direction D1 under the action of a preset external force, at least one partition can extend or retract when the sound-absorbing structure 100 is bent, thereby simply and effectively solving the problem that two intersecting straight partitions are difficult to bend. Furthermore, when both the first partition 121 and the second partition 122 are extendable partitions, the bending freedom of the sound-absorbing structure 100 can be greatly increased. In other words, the sound-absorbing structure 100 can be bent at least around an axis parallel to the first direction D1 and the second direction D2, thereby further enhancing the curved surface adaptability of the sound-absorbing structure 100.

[0051] In some embodiments, the spacer 120 includes at least one of a corrugated spacer and a sawtooth spacer. For example... Figures 2 to 4 As shown, the first spacer 121 is a wavy spacer, which enhances the expansion and contraction performance of the first spacer 121 along the second direction, so that when the sound-absorbing structure 100 is bent, the length of the resonant cavity Q can expand and contract along the second direction D2. It can be understood that the second spacer 122 can also be set as a wavy spacer, so that the resonant cavity Q can also expand and contract along the first direction D1, thereby improving the bendability of the sound-absorbing structure 100. At the same time, the wavy spacer and the sawtooth spacer have simple structures, are easy to mold and form, and help to reduce production costs.

[0052] Optional, such as Figure 2 and Figure 3 As shown, the distance t between adjacent crests or troughs of the first spacer 121 is less than or equal to a preset distance. A smaller t indicates more waves or serrations in the first spacer 121, which facilitates the provision of more elongated (or compressed) ribs under tension (or compression), thus enabling the formation of a larger bending angle. Therefore, this preset distance can be set for different application scenarios, allowing the first spacer 121 to have an appropriate number of ribs in the corresponding scenario, facilitating the stretching (or compression) of the spacer during bending. For example, for a large mounting surface, this preset distance can be on the order of centimeters or millimeters, while for a small mounting surface, it can be on the order of millimeters or micrometers, depending on the specific scenario.

[0053] In some embodiments, spacers 120, at least partially spaced along the second direction D2, are offset in the first direction D1. For example... Figure 2 and Figure 3 As shown, in the first direction, the second spacer 122 is staggered, which allows the resonant cavity Q to be staggered. Compared with the resonant cavity arranged in an array without staggering in the traditional sound absorption structure, it can reduce the structural stress and thus further improve the bending performance of the sound absorption structure 100.

[0054] In some embodiments, at least a portion of the spacer 120 is made of a flexible material, which facilitates the spacer 120 to undergo expansion, contraction, torsion, and bending deformation. The flexible material can be thermoplastic polyurethane elastomer (TPU), polyvinyl alcohol (PVA), polyester (PET), polyimide (PI), polyethylene naphthalate (PEN), etc. Optionally, the body 110 is made of the same material as the spacer, which facilitates the fabrication of the sound-absorbing structure 100.

[0055] In some embodiments, the thickness of the sound-absorbing structure 100 is less than or equal to 20 mm. For example, it can be 2 mm, 4 mm, 6 mm, 8 mm, 12 mm, 14 mm, 16 mm, 18 mm, or 20 mm. Optionally, the thickness of the sound-absorbing structure 100 is greater than or equal to 12 mm and less than or equal to 20 mm, which helps to achieve a balance between manufacturing costs and thickness control.

[0056] In some embodiments, the body 110 has a first side and a second side disposed opposite to each other. The body 110 includes: a top plate 111 disposed on the first side and connected to one end of a plurality of spacers 120, the top plate 111 having a plurality of micro-holes 1110; an insertion tube 113 communicating with the micro-holes 1110 and extending to the second side; and a bottom plate 112 disposed on the second side and connected to the other end of the plurality of spacers 120. The diameter of each micro-hole 1110 can be the same or different. The top plate 111, the insertion tube 113, the bottom plate 112, and the plurality of spacers 120 together enclose and form a plurality of independent resonant cavities Q. Furthermore, the length of the insertion tube 113, the diameter of the insertion tube 113 (which is the same as the diameter of the micro-holes 1110), and the size of the resonant cavity Q all have the function of adjusting the resonant frequency of the resonant cavity Q. Specifically, the longer the insertion tube 113, the lower the sound absorption frequency; the smaller the diameter of the insertion tube 113, the lower the sound absorption frequency; and the larger the volume of the resonant cavity Q, the lower the frequency. By combining resonant cavities Q with different structural dimensional parameters, a sound-absorbing structure 100 with broadband sound absorption effect can be formed. Optionally, the top plate 111, multiple spacers 120, and insert 113 can be integrally formed, for example, by 3D printing using a flexible substrate. The spacers 120 and the bottom plate 112 can be tightly connected by gluing or welding. The flexible substrate can be made of the aforementioned flexible material.

[0057] The sound-absorbing structure 100 and its sound-absorbing effect under different bending states will be described below through an optional specific embodiment.

[0058] The structure of the sound-absorbing structure 100 can be found in [reference]. Figure 2 and Figure 3 The corresponding structural parameters can be found in Table 1. The depth of the cannula ranges from 2 mm to 8.5 mm, and the diameter of the micropore 1110 is 1.6 mm.

[0059] Table 1

[0060]

[0061] Figure 8 The diagram shows the sound absorption coefficient of the sound-absorbing structure 100 as a function of frequency when it is not bent, bent at 45°, and bent at 90°. From... Figure 8As can be seen, the sound-absorbing structure 100 exhibits a high sound absorption coefficient within the 500Hz–800Hz range under different bending states. Specifically, the sound absorption coefficient at a 90° bend is generally higher than that at a 45° bend and without bending at different frequencies, while the sound absorption coefficient at a 45° bend is generally higher than that without bending. Furthermore, within the 500Hz–800Hz range, the average sound absorption coefficient of the sound-absorbing structure 100 under different bending states is approximately 0.63, demonstrating excellent sound absorption performance. In addition, the sound-absorbing structure 100 is only 12mm thick, which significantly reduces the installation space required and broadens its applicability.

[0062] This application also provides an apparatus comprising: a housing; a sound source disposed in or within the housing; and a sound-absorbing structure 100 as described above, wherein the sound-absorbing structure 100 is disposed in or within the housing, and the sound wave incident surface P of the sound-absorbing structure 100 faces the sound source.

[0063] The aforementioned device can effectively absorb noise emitted by the sound source inside the device by setting the sound-absorbing structure 100 as described above at the corresponding part of the housing or inside the housing, thereby helping to reduce or eliminate noise and make the device operate quietly and stably; at the same time, the aforementioned sound-absorbing structure can fit its installation part well, thereby greatly saving installation space and contributing to the miniaturization of the overall device.

[0064] In addition, the aforementioned device may be an air compressor, engine, fan, gearbox, motor, etc., or it may be a device that includes the aforementioned components, such as a vehicle, vacuum pump, power tool, etc.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A sound absorbing structure, characterized by, The sound-absorbing structure comprises: a body having a sound wave incidence surface; a plurality of partitions, at least part of the partitions being arranged in the body in a first direction parallel to the sound wave incidence surface, and at least part of the partitions being arranged in the body in a second direction parallel to the sound wave incidence surface, the first direction intersecting the second direction; the plurality of partitions and the body enclosing a plurality of resonant cavities configured to absorb sound waves by resonance; wherein at least one of the resonant cavities is bendable; and when bent, the length of at least one of the resonant cavities in the first direction and / or the second direction changes; the body has oppositely arranged first and second sides, and the body comprises: a top plate arranged on the first side and connected to one end of the plurality of partitions; a bottom plate arranged on the second side and connected to the other end of the plurality of partitions; oppositely arranged first and second plates, the first plate connecting one end of the top plate and the bottom plate, and the second plate connecting the other end of the top plate and the bottom plate.

2. The sound absorbing structure according to claim 1, characterized in that, The sound-absorbing structure can be bent around a predetermined axis parallel to the sound wave incidence surface, and the sound-absorbing structure after bending has a sound wave incidence surface with a circular arc profile, and the corresponding central angle of the profile ranges from -360° to 360°.

3. The sound-absorbing structure according to claim 1 or 2, wherein: the plurality of partitions comprise a plurality of first partitions arranged in the first direction, the first partitions being configured to be stretchable and contractable by a predetermined length in the second direction under the action of a predetermined external force; and / or, the plurality of partitions comprise a plurality of second partitions arranged in the second direction, the second partitions being configured to be stretchable and contractable by a predetermined length in the first direction under the action of a predetermined external force.

4. The sound absorbing structure according to claim 1 or 2, characterized by The partitions comprise at least one of a wave-shaped partition and a sawtooth-shaped partition.

5. The sound absorbing structure according to claim 4, characterized in that The distance between adjacent wave crests or adjacent wave troughs of the partitions is less than or equal to a predetermined distance.

6. The sound absorbing structure according to claim 1 or 2, characterized by At least part of the partitions arranged in the second direction are arranged in a staggered manner in the first direction.

7. The sound absorbing structure according to claim 1 or 2, characterized by At least part of the partitions are made of a flexible material.

8. The sound absorbing structure according to claim 1 or 2, characterized by The thickness of the sound-absorbing structure is less than or equal to 20 mm.

9. The sound absorbing structure according to claim 1 or 2, characterized by, The top plate is provided with a plurality of micro-holes; the body comprises a cannula, which communicates with the micro-holes and extends towards the second side.

10. A device for absorbing noise, characterized in that The sound-absorbing structure comprises: a housing; a sound source arranged in or on the housing; and, the sound-absorbing structure according to any one of claims 1-9, the sound-absorbing structure being arranged in or on the housing, and the sound wave incidence surface of the sound-absorbing structure facing the sound source.

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