Noise reduction structure and electronic equipment
By setting up a multi-layered mesh structure and a stacked metal mesh design in the sound pickup channel of the electronic device, the problem of poor wind noise reduction effect in the existing technology is solved, achieving more efficient wind noise reduction and waterproof and dustproof effects, and improving the reliability of the equipment.
Patent Information
- Application Number
- CN202422874107.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Existing noise reduction structures are not effective at reducing wind noise.
The system employs a multi-layered mesh structure, with at least two layers having different pore densities, creating a complex cavity environment that increases the friction between the air and the mesh structure. Furthermore, the system enhances wind noise reduction through the layering of metal mesh and the design of noise-reducing components of different shapes.
It effectively improves the noise reduction effect of wind noise, while enhancing the waterproof and dustproof function and improving the reliability of electronic equipment.
Smart Images
Figure CN223553430U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic devices, and more particularly to a noise reduction structure and electronic device. Background Technology
[0002] For example, electronic devices such as mobile phones typically have sound pickup devices. When these devices are outdoors, wind noise can be introduced into the audio signal picked up by these devices. Therefore, related technologies utilize noise reduction structures to decrease wind noise.
[0003] However, the noise reduction structures in related technologies suffer from poor noise reduction performance. Utility Model Content
[0004] To overcome the problems existing in related technologies, this application provides a noise reduction structure and electronic device.
[0005] According to a first aspect of this application, a noise reduction structure is provided for use in an electronic device having a pickup channel for connecting a pickup device. The noise reduction structure includes: a multi-layer mesh structure disposed in the pickup channel; wherein at least two layers of the mesh structure have different pore densities.
[0006] In some embodiments of this application, the pickup channel includes a first port and a second port, the first port being used to communicate with the pickup device, and the multi-layer mesh structure including: a first mesh layer covering the first port; a second mesh layer covering the second port; and a third mesh layer disposed between the first mesh layer and the second mesh layer; wherein, at least the pore density of the first mesh layer and the second mesh layer is different.
[0007] In some embodiments of this application, the third mesh layer includes multiple metal meshes, which are stacked along the extension direction of the pickup channel; or, the multiple metal meshes cooperate with each other to form a noise reduction component of a preset shape, which is fixed in the pickup channel.
[0008] In some embodiments of this application, the noise reduction component of the preset shape includes a columnar noise reduction component, wherein the first metal mesh forms a wound intermediate body from the inside out, and starting from the second metal mesh, the meshes are sequentially stacked and wound on the previous metal mesh; or, the noise reduction component of the preset shape includes a folded noise reduction component, wherein the folded noise reduction component includes a plurality of V-shaped structural members arranged along a first direction, with adjacent V-shaped structural members connected end to end, each metal mesh constituting at least one V-shaped structural member, or every two metal meshes constituting one V-shaped structural member.
[0009] In some embodiments of this application, the columnar noise reduction element is fixed to the pickup channel to block the second port, the axial direction of the columnar noise reduction element is perpendicular to the extension direction of the pickup channel, and a portion of the columnar noise reduction element protrudes from the second port, with the second mesh layer covering the protruding portion of the columnar noise reduction element.
[0010] In some embodiments of this application, the folded noise reduction component is fixed within the pickup channel, and the first direction is parallel to the extension direction of the pickup channel; or, at least one layer of the folded noise reduction component is provided within the pickup channel, and the first direction of each layer of the folded noise reduction component is perpendicular to the extension direction of the pickup channel.
[0011] In some embodiments of this application, the multi-layered mesh structure further includes: at least one fourth mesh layer, each of the fourth mesh layers being disposed on the side of each of the folded noise reduction components facing away from the second mesh layer; or, multiple layers of the folded noise reduction components are disposed within the sound pickup channel, with an air layer disposed between adjacent folded noise reduction components, and each of the fourth mesh layers being disposed between each adjacent folded noise reduction component and the air layer.
[0012] In some embodiments of this application, the mesh size of each of the metal meshes is from 2 μm to 200 μm, and at least two of the metal meshes have different mesh sizes.
[0013] In some embodiments of this application, a cavity is provided between the first mesh layer and the third mesh layer. Along the direction from the second port to the first port, the cavity includes at least a first cavity portion and a second cavity portion that are sequentially arranged and connected. The cross-sectional area of the first cavity portion is larger than the cross-sectional area of the second cavity portion. The cross-section is the cross section of the cavity in the direction perpendicular to the sound pickup path.
[0014] According to a second aspect of this disclosure, an electronic device is provided, including the noise reduction structure as described in the first aspect.
[0015] The technical solutions provided by the embodiments of this application may include the following beneficial effects:
[0016] The noise reduction structure provided in this application has a multi-layered mesh structure, with at least two layers having different pore densities. This creates a more complex cavity environment, increasing the friction between the air and each mesh structure, thereby effectively improving the wind noise reduction effect. Furthermore, by making at least two layers of mesh structure have different pore densities, it also helps to achieve waterproof and dustproof functions, thus further improving the noise reduction effect while also improving the reliability of electronic devices.
[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0019] Figure 1 This is a schematic diagram of the structure of an electronic device when multiple metal meshes are stacked according to an exemplary embodiment;
[0020] Figure 2 This is a schematic diagram of the structure of an electronic device when the noise reduction element is a columnar noise reduction element, according to an exemplary embodiment.
[0021] Figure 3 This is a schematic diagram illustrating the reverberation path of air molecules according to an exemplary embodiment;
[0022] Figure 4 This is a schematic diagram of the structure of an electronic device when the noise reduction device is a foldable noise reduction device, according to an exemplary embodiment.
[0023] Figures 5-10 This is a schematic diagram of the structure of an electronic device when the noise reduction device is a foldable noise reduction device, according to another exemplary embodiment;
[0024] Figure 11 This is a schematic diagram of the structure of an electronic device according to an exemplary embodiment;
[0025] Figures 12-14 This is a schematic diagram of the structure of an electronic device according to another exemplary embodiment.
[0026] In the picture:
[0027] 1-Electronic device; 11-Housing; 111-Pickup channel; 1111-First port; 1112-Second port; 12-Pickup device;
[0028] 2-Noise reduction structure; 21-First mesh layer; 22-Second mesh layer; 23-Third mesh layer; 231-Columnar noise reduction component; 232-Folded noise reduction component; 24-Fourth mesh layer; 25-Cavity; 251-First cavity portion; 252-Second cavity portion; 26-Microporous structure; 27-High acoustic impedance polyester mesh; 28-Air layer. Detailed Implementation
[0029] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0030] For example, mobile phones and other electronic devices typically have sound pickup devices, such as microphones. When these devices are outdoors or moving rapidly, the audio picked up by these devices often includes harsh wind noise. Therefore, related technologies use noise reduction structures to reduce wind noise. However, these noise reduction structures often suffer from poor noise reduction performance.
[0031] For example, in related technologies, electronic devices are equipped with a sound pickup device and a sound pickup channel connected to the sound pickup device is provided on the housing. The noise reduction structure is noise-reducing foam disposed within the sound pickup channel. Because the noise-reducing foam has a porous structure, when sound waves are incident on the surface of the porous material, it causes air movement in the small pores or gaps inside the material. The friction between air molecules and the pore walls, as well as the fact that air molecules close to the pore walls and fiber surfaces are not easily moved due to the influence of the pore walls, cause sound energy to be converted into heat energy, thereby attenuating the sound waves and achieving a sound absorption effect, thus reducing wind noise. However, the noise reduction effect of the noise-reducing foam is not good.
[0032] To address the aforementioned technical problems, this application provides a noise reduction structure comprising multiple layers of mesh structures, with at least two layers having different pore densities. This creates a more complex cavity environment, increasing the friction between the air and each mesh structure, thereby effectively improving wind noise reduction. Furthermore, by ensuring different pore densities in at least two mesh layers, waterproofing and dustproofing are also facilitated, further enhancing noise reduction while simultaneously improving the reliability of electronic devices.
[0033] Combination Figure 1 An exemplary embodiment of this application provides a noise reduction structure 2, applied to an electronic device 1 equipped with a sound pickup channel 111, such as a mobile phone, headphones, or a camera. The sound pickup channel 111 is used to connect to a sound pickup device 12, such as a microphone.
[0034] The noise reduction structure 2 includes a multi-layer mesh structure, which is disposed in the pickup channel 111. The audio signal entering from the pickup channel 111 is picked up by the pickup device 12 after being denoised by the noise reduction structure 2, thus effectively improving the audio quality picked up by the pickup device 12.
[0035] At least two layers of the mesh structure have different pore densities. This arrangement, on the one hand, creates a more complex cavity environment, increasing the friction between the air and each mesh structure, thereby effectively improving wind noise reduction. On the other hand, by having at least two layers of mesh structures with different pore densities, it also helps to achieve waterproof and dustproof functions, thus further improving the noise reduction effect while also enhancing the reliability of the electronic device 1. For example, one layer of the mesh structure near the sound inlet of the pickup channel 111 is used for dustproofing, and its pore density can be, for example, in the range of 750 mesh to 850 mesh. Another layer of the mesh structure near the sound outlet of the pickup channel 111 is used for waterproofing, while still allowing the passage of sound and gas; the pore density of this layer is greater than that of the layer near the sound inlet of the pickup channel 111. Other mesh layers in the multi-layer mesh structure can be used for noise reduction, for example, the pore density of which is greater than the pore density of the mesh layer near the sound inlet of the pickup channel 111 and less than the pore density of the mesh layer near the sound outlet of the pickup channel 111.
[0036] For example, the noise reduction structure 2 also includes a housing 11, which may be, for example, the housing 11 constituting the electronic device 1, and the multi-layer mesh structure noise reduction structure 2 can be directly disposed within the sound pickup channel 111 of the electronic device 1. Alternatively, it can be a housing 11 added to the electronic device 1, that is, the noise reduction structure 2 is a separate structural component with a separate sound pickup channel 111 inside, in which a multi-layer mesh structure is disposed, and when assembled onto the electronic device, the sound pickup channel 111 on the noise reduction structure 2 is connected to the sound pickup channel on the electronic device. In this way, the flexibility of use of the noise reduction structure 1 can be improved.
[0037] Combination Figure 1 In one embodiment, the pickup channel 111 includes a first port 1111 and a second port 1112, the first port 1111 being used to connect to the pickup device 12. The multi-layer mesh structure includes a first mesh layer 21, a second mesh layer 22, and a third mesh layer 23. The first mesh layer 21 covers the first port 1111, the second mesh layer 22 covers the second port 1112, and the third mesh layer 23 is disposed between the first mesh layer 21 and the second mesh layer 22, serving a noise reduction function.
[0038] At least the first mesh layer 21 and the second mesh layer 22 have different pore densities. Exemplarily, it may be that only the first mesh layer 21 and the second mesh layer 22 have different pore densities, or it may be that the pore densities of the first mesh layer 21, the second mesh layer 22, and the third mesh layer 23 are all different. The second mesh layer 22 serves a dustproof function, and its pore density may be, for example, in the range of 750 mesh to 850 mesh. The first mesh layer 21 provides waterproof and breathable functionality; its pore density is greater than that of the second mesh layer 22, so that while achieving waterproofing, it allows sound and gas to pass through.
[0039] This allows the multi-layered mesh structure to create a more complex cavity environment, increasing the friction between the air and each mesh structure, thereby effectively improving the wind noise reduction effect. On the other hand, by making the pore density of at least the first mesh layer 21 and the second mesh layer 22 different, it also helps to achieve waterproof and dustproof functions, thereby further improving the noise reduction effect and also improving the reliability of the electronic device 1.
[0040] Combination Figure 1 In one embodiment, the third mesh layer 23 includes multiple metal meshes stacked along the extension direction of the sound pickup channel 111. This design allows for several advantages. First, the cavity environment formed by the stacked metal meshes allows low-frequency human voices to pass through normally. Second, when high-frequency noise waves strike the surface of the metal meshes, the rigid structure and mesh openings of the metal meshes disperse and block the high-frequency air turbulence caused by the high-frequency sound waves, causing friction between air molecules and the pore walls of the metal mesh, thereby reducing the intensity of high-frequency vibrations and thus reducing wind noise. Third, noise reduction is achieved through the stacked metal meshes. Compared to noise-reducing foam, metal meshes do not retain water, thus effectively improving the reliability and noise reduction effect of the electronic device 1.
[0041] Combination Figure 2 and Figure 4 In another embodiment, the third mesh layer 23 includes multiple metal meshes that cooperate to form a noise reduction component of a preset shape. The preset shape can be a regular structural shape such as a columnar shape, or an irregular structural shape such as folded or intersecting shapes; there is no specific limitation on this. The noise reduction component is fixed within the pickup channel 111. This arrangement increases the complexity of the constructed cavity environment, thereby increasing the friction between air molecules and the metal mesh, further improving the noise reduction effect.
[0042] Combination Figure 11In another embodiment, the third mesh layer 23 is a microporous structure 26. The microporous structure 26 can be, for example, a microporous foamed aluminum or microporous corroded ceramic, a microporous sound-permeable structure, to enhance the filtration of wind noise and further block it, thereby improving the noise reduction effect. A high acoustic impedance polyester mesh 27 is provided on the side of the microporous structure 26 facing away from the second mesh layer 22 to further enhance the blocking effect of wind noise, thereby further improving the noise reduction effect.
[0043] Combination Figure 2 In one embodiment, the noise reduction component with a preset shape includes a columnar noise reduction component 231. From the inside out, the columnar noise reduction component 231 has a first metal mesh forming a wound intermediate body, and from the second metal mesh onwards, the meshes are sequentially stacked and wound onto the previous metal mesh. This design, on the one hand, allows air molecules to circulate within the space formed by the internal folds of the columnar noise reduction component 231 (as shown in Figure 3), increasing the friction between the air molecules and the metal mesh, thereby further improving the noise reduction effect.
[0044] Combination Figure 4 In another embodiment, the noise reduction component with a preset shape includes a folded noise reduction component 232. The folded noise reduction component 232 includes multiple V-shaped structural components arranged along a first direction, with adjacent V-shaped structural components connected end to end. Each metal mesh constitutes at least one V-shaped structural component. This design can also increase the complexity of the constructed cavity environment. Air molecules will reverberate within the space formed between the V-shaped structural components (as shown in Figure 3), increasing the friction between air molecules and the metal mesh, improving the noise reduction capability of the folded noise reduction component 232 in a specific direction, and thus improving the noise reduction effect. It should be noted that the specific direction refers to the extension direction of the folded noise reduction component 232, such as the extension direction along the pickup channel 111.
[0045] Combination Figure 4 In another embodiment, the noise reduction component with a preset shape includes a folded noise reduction component 232. The folded noise reduction component 232 includes multiple V-shaped structural components arranged along a first direction, with adjacent V-shaped structural components connected end to end, and each pair of metal meshes forming a V-shaped structural component. This design can also increase the complexity of the constructed cavity environment, allowing air molecules to circulate within the space formed between the V-shaped structural components (e.g., Figure 3 The reverberation path of air molecules (as shown) increases the friction between air molecules and the metal mesh, thereby further improving the noise reduction effect.
[0046] like Figure 4As shown, for example, the electronic device 1 is provided with multiple sound pickup channels 111, all of which are connected to the sound pickup device 12. Each sound pickup channel 111 is provided with a folded noise reduction component 232. In this way, while improving the sound pickup effect, the noise of wind is reduced, thereby improving the audio quality.
[0047] Combination Figure 2 In one embodiment, the columnar noise reduction component 231 is fixed to the sound pickup channel 111 to block the second port 1112. The axial direction of the columnar noise reduction component 231 is perpendicular to the extension direction of the sound pickup channel 111, and a portion of the columnar noise reduction component 231 protrudes from the second port 1112. This arrangement allows the columnar noise reduction component 231 to reduce wind noise from all directions, thereby further improving the noise reduction effect. The second mesh layer 22 covers the protruding portion of the columnar noise reduction component 231 and is fixed to the housing 11. This ensures dustproof performance while improving the ease of installation of the second mesh layer 22.
[0048] Combination Figure 4 In one embodiment, the folded noise reduction component 232 is fixed within the pickup channel 111, and the first direction of the arrangement of the multiple V-shaped structural components is parallel to the extension direction of the pickup channel 111. This increases the complexity of the constructed cavity environment, causing air molecules to circulate within the space formed between the V-shaped structural components. This increases the friction between the air molecules and the metal mesh, improving the noise reduction capability of the folded noise reduction component 232 in a specific direction, thereby enhancing the noise reduction effect.
[0049] Combination Figure 5 , Figure 6 and Figure 7 In another embodiment, at least one layer of folded noise reduction element 232 is provided within the sound pickup channel 111, and the first direction of the arrangement of multiple V-shaped structural members of each layer of folded noise reduction element 232 is perpendicular to the extension direction of the sound pickup channel 111. Exemplarily, only one layer of folded noise reduction element 232 can be provided within the sound pickup channel 111, or multiple layers of folded noise reduction element 232 can be provided within the sound pickup channel 111 along its extension direction, such as 2 layers, 3 layers, 4 layers, etc. This increases the complexity of the constructed cavity environment and prolongs the reverberation path of high-frequency sound waves within the cavity environment, thereby increasing the friction between air molecules and the metal mesh and improving the noise reduction effect.
[0050] Combination Figure 5 , Figure 6 and Figure 7In one embodiment, the multi-layer mesh structure further includes at least one fourth mesh layer 24, with each fourth mesh layer 24 disposed on the side of each folded noise reduction element 232 facing away from the second mesh layer 22. The fourth mesh layer 24 may be, for example, a high acoustic impedance polyester mesh to further enhance the blocking effect on wind noise, thereby further improving the noise reduction effect. Exemplarily, the number of fourth mesh layers 24 is adapted to the number of folded noise reduction elements 232. When the folded noise reduction element 232 has only one layer, the fourth mesh layer 24 is also provided; and when the folded noise reduction element 232 has multiple layers, such as two layers, the fourth mesh layer 24 is also provided in two layers.
[0051] Combination Figure 5 , Figure 6 and Figure 7 In another embodiment, the sound pickup channel 111 is provided with a multi-layered folded noise reduction element 232, and an air layer 28 is provided between adjacent folded noise reduction elements 232. The air layer 28 can extend the propagation path of high-frequency sound waves, i.e., wind noise, to dissipate the energy of wind noise, thereby improving the noise reduction effect. A fourth mesh layer 24 is provided between each adjacent folded noise reduction element 232 and the air layer 28 to further enhance the blocking effect on wind noise, thereby further improving the noise reduction effect.
[0052] Combination Figure 8 , Figure 9 and Figure 10 In one embodiment, each air layer 28 is filled with a microporous structure 26, which may be a structure such as foam, mesh ceramic, or foamed metal, to enhance the filtration of wind noise and further block wind noise, thereby further improving the noise reduction effect.
[0053] In one embodiment, the mesh size of each metal mesh is between 2 μm and 200 μm, and at least two metal meshes have different mesh sizes. Exemplarily, only two metal meshes may have different mesh sizes, or more than two metal meshes may have different mesh sizes, such as three, four, or all metal meshes may have different mesh sizes. The cavities formed by metal meshes of different densities have different densities, resulting in different filtering effects on wind noise of different frequencies. By adopting this configuration, a more complex cavity environment is constructed, enabling noise reduction of turbulence at different wind speeds, thereby further improving the noise reduction effect.
[0054] In one embodiment, the surface of the metal mesh is surface-treated to increase its surface friction; the surface treatment may be, for example, a spray coating. This further enhances the rigidity of the metal mesh surface, preventing high-frequency turbulent wind noise from causing the metal mesh to vibrate, thus increasing the friction against high-frequency turbulent wind noise and further improving the noise reduction effect.
[0055] Combination Figure 12 , Figure 13 and Figure 14 In one embodiment, a cavity 25 is provided between the first mesh layer 21 and the third mesh layer 23. Along the direction from the second port 1112 to the first port 1111, the cavity 25 includes at least a first cavity portion 251 and a second cavity portion 252 that are sequentially arranged and connected. Exemplarily, for example, the cavity may only include the connected first cavity portion 251 and the second cavity portion 252, or it may include the connected first cavity portion 251 and the second cavity portion 252, a third cavity portion connected to the first cavity portion 251, and a fourth cavity portion connected to the second cavity portion 252.
[0056] The cross-sectional area of the first cavity portion 251 is larger than the cross-sectional area of the second cavity portion 252, and the cross-section is the section of the cavity 25 perpendicular to the sound pickup path. For example, the cross-sectional shape of the cavity 25 is, for example, a trumpet shape, a U-shape, an ellipse, or a circular or polygonal structure.
[0057] With this configuration, the wind noise energy, after passing through the third mesh layer 23, first enters the first cavity section 251 and then the second cavity section 252. This effectively reduces the vibration frequency of the wind noise, thus effectively weakening its energy and converting the high-frequency vibrations of the wind noise into low-frequency vibrations within the cavity 25, thereby further enhancing the noise reduction effect. Furthermore, the second cavity section 252 also facilitates better sound pickup, thereby further improving audio quality.
[0058] According to the second aspect of this disclosure, such as Figure 1 As shown, an electronic device 1 is provided, such as a mobile phone, headphones, camera, etc. The electronic device 1 includes a noise reduction structure 2 as described above. The noise reduction structure 2 includes a multi-layer mesh structure disposed in the sound pickup channel 111. Audio signals entering from the sound pickup channel 111 are noise-reduced by the noise reduction structure 2 and then picked up by the sound pickup device 12, thus effectively improving the audio quality picked up by the sound pickup device 12. At least two layers of the mesh structure have different pore densities. This arrangement, on the one hand, creates a more complex cavity environment, increasing the friction between the air and each mesh structure, thereby effectively improving the wind noise reduction effect. On the other hand, by making at least two layers of the mesh structure have different pore densities, it also helps to achieve waterproof and dustproof functions, thereby further improving the noise reduction effect and also improving the reliability of the electronic device 1.
[0059] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention filed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not claimed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.
[0060] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. A noise reduction structure applied to an electronic device equipped with a pickup channel, the pickup channel being used to connect to a pickup device, characterized in that, The noise reduction structure includes: A multi-layered mesh structure is disposed in the sound pickup channel; In this case, at least two layers of the mesh structure have different pore densities.
2. The noise reduction structure according to claim 1, characterized in that, The pickup channel includes a first port and a second port, the first port being used to connect to the pickup device, and the multi-layered mesh structure includes: A first mesh layer covers the first port; A second mesh layer covers the second port; A third mesh layer is disposed between the first mesh layer and the second mesh layer; Among them, at least the pore densities of the first mesh layer and the second mesh layer are different.
3. The noise reduction structure according to claim 2, characterized in that, The third mesh layer comprises multiple metal meshes, which are stacked along the extension direction of the sound pickup channel; or, Multiple metal meshes cooperate to form a noise reduction component of a preset shape, and the noise reduction component is fixed in the sound pickup channel.
4. The noise reduction structure according to claim 3, characterized in that, The noise reduction component with the preset shape includes a columnar noise reduction component. From the inside out, the first metal mesh forms a wound intermediate body, and starting from the second metal mesh, they are sequentially stacked and wound onto the previous metal mesh; or... The noise reduction component with the preset shape includes a folded noise reduction component, which includes a plurality of V-shaped structural components arranged along a first direction. Adjacent V-shaped structural components are connected end to end. Each metal mesh constitutes at least one V-shaped structural component, or every two metal meshes constitute one V-shaped structural component.
5. The noise reduction structure according to claim 4, characterized in that, The columnar noise reduction component is fixed to the sound pickup channel to block the second port. The axial direction of the columnar noise reduction component is perpendicular to the extension direction of the sound pickup channel, and a portion of the columnar noise reduction component protrudes from the second port. The second mesh layer covers the protruding portion of the columnar noise reduction component.
6. The noise reduction structure according to claim 4, characterized in that, The folded noise reduction component is fixed within the sound pickup channel, and the first direction is parallel to the extending direction of the sound pickup channel; or, The pickup channel is provided with at least one layer of the folded noise reduction component, and the first direction of each layer of the folded noise reduction component is perpendicular to the extension direction of the pickup channel.
7. The noise reduction structure according to claim 6, characterized in that, The multi-layered mesh structure further includes: At least one fourth mesh layer, each of the fourth mesh layers is respectively disposed on the side of each of the folded noise reduction components away from the second mesh layer, or, multiple layers of the folded noise reduction components are disposed in the sound pickup channel, and an air layer is disposed between adjacent folded noise reduction components, with each of the fourth mesh layers respectively disposed between each adjacent folded noise reduction component and the air layer.
8. The noise reduction structure according to any one of claims 3 to 7, characterized in that, The mesh size of each of the metal meshes is from 2 μm to 200 μm, and at least two of the metal meshes have different mesh sizes.
9. The noise reduction structure according to any one of claims 2 to 7, characterized in that, A cavity is provided between the first mesh layer and the third mesh layer. Along the direction from the second port to the first port, the cavity includes at least a first cavity portion and a second cavity portion that are arranged sequentially and connected. The cross-sectional area of the first cavity portion is larger than the cross-sectional area of the second cavity portion. The cross-section is the cross section of the cavity in the direction perpendicular to the sound pickup path.
10. An electronic device, characterized in that, Includes the noise reduction structure as described in any one of claims 1 to 9.