Electronic device

Abstract

The application discloses an electronic device, wherein the electronic device comprises a shell and a microphone assembly; the shell is provided with a first sound pickup hole; the microphone assembly is arranged in the shell, and comprises a circuit board assembly and a microphone body; the circuit board assembly is connected with the shell and is provided with a second sound pickup hole; the second sound pickup hole is communicated with the first sound pickup hole, and the two form a sound pickup channel in cooperation; the microphone body is arranged on the side of the circuit board assembly which is away from the first sound pickup hole, and is used for picking up a sound signal which is propagated through the sound pickup channel; in the direction towards the microphone body, the aperture of the sound pickup channel is arranged in a reduced manner. The technical scheme can improve the wind noise resistance of the microphone assembly and improve the sound pickup effect.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to an electronic device. Background Technology

[0002] With the development of electronic technology, more and more electronic devices are appearing in people's work and life. Electronic devices usually have communication, recording and radio functions. In order to realize these functions, electronic devices need to be equipped with microphone (MIC) components for sound pickup.

[0003] In related technologies, electronic devices such as headphones typically have microphone components located inside or outside the headphone housing, including the microphone body and a pickup hole on the microphone body for sound pickup. However, in various usage environments, such as outdoor wind or relative wind generated during exercise, airflow separation occurs at the pickup hole when the airflow passes over the housing surface, easily generating turbulence. This turbulence can directly affect the diaphragm on the microphone body or enter through the pickup hole channel, transforming into low-frequency wind noise, resulting in decreased sound pickup quality and reduced user experience. Utility Model Content

[0004] This application provides an electronic device that can improve the wind noise resistance of a microphone assembly and enhance sound pickup performance.

[0005] This application provides an electronic device including a housing and a microphone assembly. The housing has a first pickup hole. The microphone assembly is disposed within the housing and includes a circuit board assembly and a microphone body. The circuit board assembly is connected to the housing and has a second pickup hole, wherein the second pickup hole communicates with the first pickup hole, and the two cooperate to form a pickup channel. The microphone body is disposed on the side of the circuit board assembly facing away from the first pickup hole and is used to pick up sound signals transmitted through the pickup channel. The aperture of the pickup channel is reduced in the direction towards the microphone body.

[0006] The electronic device based on the embodiments of this application has a housing with a first sound pickup hole and a circuit board assembly with a second sound pickup hole. The second sound pickup hole is connected to the first sound pickup hole, and the two work together to form a sound pickup channel. The robust structure of the housing can guide the airflow to flow smoothly, reduce airflow separation at the opening, reduce direct airflow impact, and reduce the intensity of turbulence sources.

[0007] By narrowing the aperture of the pickup channel in the direction extending towards the microphone body, airflow is restricted and slowed as it enters the channel, significantly reducing the impact energy of the wind and ensuring the smooth entry of the target sound (such as human voice). The reduced cross-sectional area of ​​the pickup channel in the direction towards the microphone body means that, at the same wind speed, a smaller cross-sectional area results in less airflow per unit time. This significantly limits the total amount of airflow entering the pickup channel; even if turbulence exists, its impact range is reduced due to the decreased air volume, thus reducing the continuous, high-intensity impact on the microphone body and achieving a reduction in wind noise.

[0008] Furthermore, within the narrowed pickup channel, the airflow undergoes kinetic energy conversion due to spatial compression. When the airflow enters from the inlet of the pickup channel with its larger aperture, the inner wall of the channel exerts pressure and frictional resistance on the airflow. The narrowed pickup channel also forces the airflow to change its motion, transforming from rapid impact to slow penetration, thus attenuating its kinetic energy. At this point, when the turbulence generated by the airflow impact reaches the microphone body, due to space constraints and energy loss, it can no longer form strong turbulence, significantly reducing the intensity of wind noise. This improves the wind noise reduction effect of the microphone assembly, effectively enhancing sound pickup quality and improving the user experience. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application 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 of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of an electronic device, specifically an earphone, as described in one embodiment of the electronic device of this application. Figure 2 for Figure 1 A first cross-sectional view of a portion of the headphone structure is shown in the diagram. Figure 3 for Figure 2 The enlarged schematic diagram at point A shown in the image; Figure 4 for Figure 1 A second cross-sectional view of a portion of the headphone structure is shown in the diagram. Figure 5 for Figure 1 The diagram shows a third cross-sectional view of a portion of the headphone structure. Figure 6 for Figure 5 The enlarged schematic diagram at point B shown in the image; Figure 7 A comparison graph showing the frequency response of the electronic device of this application when subjected to wind directly opposite the pickup channel; Figure 8 A comparison curve of the frequency response of the electronic device of this application when subjected to wind at a 45° angle to the center line of the pickup channel; Figure 9 The frequency response comparison curves of the electronic device of this application tested under wind at a 90° angle to the center line of the pickup channel.

[0011] Explanation of icon numbers: 100. Electronic device; 101. Sound pickup channel; 1011. First sound pickup hole; 1012. Second sound pickup hole; 1012a. First hole; 1012b. Second hole; 10. Housing; 11. Sound outlet hole; 12. Housing body; 13. Mounting part; 14. Receiving groove; 15. Support member; 16. Mounting groove; 20. Microphone assembly; 21. Circuit board assembly; 211. Circuit board; 212. Back electrode plate; 22. Microphone body; 30. First mesh assembly; 30a. Sound outlet surface; 31. First sub-mesh; 32. Second sub-mesh; 33. Third adhesive; 34. Fourth adhesive; 40. Second mesh assembly; 41. Steel mesh; 42. First adhesive; 43. Second adhesive; 50. Reinforcing plate.

[0012] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0014] Where the following description relates to the accompanying 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.

[0015] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0017] With the development of electronic technology, more and more electronic devices are appearing in people's work and life. Electronic devices usually have communication, recording and radio functions, which can meet people's needs for daily life, entertainment, communication and learning. In order to realize these functions, electronic devices need to be equipped with microphone (MIC) components for sound pickup.

[0018] In related technologies, electronic devices such as headphones typically have microphone components located inside or outside the headphone housing, including a microphone body and a pickup hole opened on the microphone body for picking up sound.

[0019] However, in various usage environments, such as outdoor wind or relative wind generated by exercise, the airflow flowing across the housing surface is prone to turbulence at the microphone hole. When the airflow flows through the microphone hole, the abrupt change in geometry between the hole opening and the housing surface causes airflow separation, forming irregular turbulent vortices.

[0020] Especially under high wind speeds, airflow can generate strong turbulence containing numerous vortices. Upon entering the microphone assembly, this turbulence directly impacts the diaphragm or is reflected by the inner wall of the pickup channel. Because the direction and speed of the vortices constantly change, the diaphragm vibrates non-periodically due to the impact of the vortices. This vibration differs from the periodic vibration caused by the sound signal, thus altering the capacitor spacing (or cutting magnetic field lines) and generating irregular electrical signals. These signals are concentrated in the low-frequency range of 20-200Hz, overlapping with the low-frequency portion of human voice (80-200Hz), which is the main reason why wind noise masks the detection sound. After being amplified by the circuit board assembly, these irregular electrical signals, if used for call functionality, will be converted into wind noise such as "whooshing" or "rustling" through the other party's speaker. If used for ANC noise reduction, they will interfere with the algorithm's judgment of environmental noise, leading to noise reduction failure or the introduction of background noise, resulting in decreased pickup quality and a reduced user experience.

[0021] To resolve the above issues, please refer to [link / reference]. Figures 1 to 3 This application discloses an electronic device 100, which includes, but is not limited to, tablet computers, mobile phones, speakers, headphones, hearing aids, etc. Figure 1 As shown, the following will take headphones as an example for a detailed introduction.

[0022] In this embodiment, the electronic device 100 includes a housing 10 and a microphone assembly 20. The microphone assembly 20 is disposed within the housing 10, which may be made of materials such as plastic or metal to protect the internal electronic components, including the microphone assembly 20. The housing 10 has a first pickup hole 1011. The microphone assembly 20 includes a circuit board assembly 21 and a microphone body 22. The circuit board assembly 21 is connected to the housing 10 and has a second pickup hole 1012. The microphone body 22 is connected to the side of the circuit board assembly 21 facing away from the first pickup hole 1011 and picks up sound signals transmitted through the second pickup hole 1012.

[0023] The housing 10 is provided with a first pickup hole 1011 and a second pickup hole 1012 connected to the first pickup hole 1011. The two work together to form a pickup channel 101, which can guide the airflow to flow smoothly by utilizing the robust structure of the housing 10, reduce airflow separation at the opening, reduce direct airflow impact, and reduce the intensity of turbulence source.

[0024] The intensity of wind noise is directly related to the flow rate and velocity of the airflow entering the pickup channel 101. The greater the flow rate and the faster the velocity, the higher the turbulence intensity, resulting in more intense collisions of the turbulence on the inner wall of the pickup channel 101, and thus stronger turbulence noise (i.e., wind noise). The technical solution of this application sets the aperture of the pickup channel 101 to be smaller in the direction of extension toward the microphone body 22. Through the design of wide inlet and narrow outlet, the airflow can be limited and decelerated during the process of entering the pickup channel 101, thereby significantly reducing the impact energy of the wind in the pickup channel 101.

[0025] The pickup channel 101 has a smaller aperture in the direction of extension toward the microphone body 22, making the aperture at the entrance end of the pickup channel 101, i.e., the end of the first pickup hole 1011 away from the microphone assembly 20, relatively larger, ensuring that the target sound (such as human voice) can enter smoothly. The flow cross-sectional area of ​​the pickup channel 101 decreases in the direction of extension toward the microphone body 22. Under the same wind speed, the smaller the flow cross-sectional area of ​​the pickup channel 101, the less airflow passes through per unit time. This means that the total amount of airflow entering the pickup channel 101 is greatly limited. Even if turbulence exists, its influence range will be reduced due to the reduced air volume, thereby reducing the continuous and high-intensity impact on the microphone body 22 and achieving the effect of reducing wind noise.

[0026] Furthermore, within the reduced-size pickup channel 101, the airflow undergoes kinetic energy conversion due to spatial compression. When the airflow enters from the inlet end of the pickup channel 101 with its larger aperture, the inner wall of the pickup channel 101 exerts pressure and frictional resistance on the airflow. On one hand, the airflow must overcome the friction of the inner wall of the pickup channel 101, and some of its kinetic energy is converted into heat energy and consumed. On the other hand, the reduced-size pickup channel 101 forces the airflow to change its motion state, from rapid impact to slow penetration, thus attenuating its kinetic energy. At this point, when the turbulence generated by the airflow impact within the pickup channel 101 reaches the microphone body 22, due to space limitations and energy loss, it can no longer form strong turbulence, avoiding violent vibration of the diaphragm on the microphone body 22 caused by turbulence. The intensity of wind noise is significantly reduced, thereby improving the wind noise reduction effect of the microphone assembly 20, effectively improving the sound pickup quality and enhancing the user experience.

[0027] In one embodiment, the first pickup hole 1011 has a stepped shape with a decreasing aperture in the direction toward the microphone body 22, and the aperture of the second pickup hole 1012 has a stepped shape with a decreasing aperture in the direction toward the microphone body 22. Alternatively, the aperture of one of the first pickup hole 1011 and the second pickup hole 1012 has a stepped shape with a decreasing aperture in the direction toward the microphone body 22, while the other is set to gradually decrease in aperture in the direction toward the microphone body 22, ensuring that the pickup channel 101 has a decreasing aperture in the extension direction toward the microphone body 22.

[0028] In the stepped structure where the apertures of both the first pickup hole 1011 and the second pickup hole 1012 are stepped and decrease in diameter in the direction toward the microphone body 22, the angle between the upper wall of the step and the central axis of the pickup channel 101 can be 90° or 60°, etc., to form an angle with the direction of the airflow that directly impacts it, thereby accurately intercepting a portion of the small turbulence at each step and preventing it from being fully conducted to the microphone body 22.

[0029] In the direction towards the microphone body 22, the pickup channel 101 is arranged in a stepped shape with a reduced aperture. This can be because the first pickup hole 1011 and the second pickup hole 1012 are each arranged in a stepped shape, and the two are combined to further arrange the pickup channel 101 in a stepped shape. Alternatively, the apertures of the first pickup hole 1011 and the second pickup hole 1012 can remain unchanged. Instead, by comparing the apertures of the two, the aperture of the first pickup hole 1011 is larger than that of the second pickup hole 1012, thereby creating a stepped structure at the junction of the two.

[0030] When the airflow carrying small turbulence flows through the stepped connection, the contraction tendency of the pickup channel 101 will push the airflow towards the microphone body 22. According to Bernoulli's principle, when the airflow enters from the inlet end of the pickup channel 101, the airflow velocity will be temporarily reduced and the pressure will be relatively increased due to each stepped inner wall surface of the first pickup hole 1011 and the second pickup hole 1012, thus creating an effect that hinders the rapid passage of airflow. This pressure change causes the small turbulence in the airflow to lose its forward momentum and be forced to remain in the pickup channel 101, instead of continuing to flow towards the microphone body 22 with the mainstream airflow.

[0031] In each stepped transition area, the airflow is gradually dispersed by slightly reducing the local aperture, reducing turbulence. In conjunction with the reduction setting of the pickup channel 101, the flow-limiting and decelerating effect of the aperture reduction is retained, and the turbulence interception effect is enhanced by the buffer structure of the stepped reduction. In particular, the control of small-sized turbulence is more precise, and the intensity of wind noise is greatly reduced, thereby achieving wind noise reduction effect, which can effectively improve the pickup quality and enhance the user experience.

[0032] In another embodiment, the pickup channel 101 is configured with a gradually decreasing aperture in the direction towards the microphone body 22; that is, both the first pickup hole 1011 and the second pickup hole 1012 are configured with a gradually decreasing aperture in the direction towards the microphone body 22. Airflow can form a wall-hugging flow effect along the inner wall surface of the pickup channel 101, avoiding airflow separation caused by abrupt changes in the shape of the inner wall of the pickup channel 101, which is one of the main causes of turbulence generation.

[0033] The pickup channel 101 is designed with a gradually decreasing aperture in the direction towards the microphone body 22. This continuous and smooth aperture change allows the aperture of the pickup channel 101 to gradually contract from its inlet end (the end of the first pickup hole 1011 furthest from the microphone body 22) to its outlet end (the end of the second pickup hole 1012 closest to the microphone body 22), forming an approximately frustum-shaped channel. This design allows the pickup channel 101 to guide airflow without abrupt changes, minimizing airflow separation and turbulence generation, while continuously weakening airflow energy. Especially in low to medium wind speed scenarios, this design achieves a better balance between pickup sensitivity and wind noise control, effectively improving pickup quality and enhancing the user experience.

[0034] The gradually decreasing aperture of the pickup channel 101 guides and weakens the airflow through continuous airflow guidance, resulting in uniform airflow deceleration and continuous energy dissipation, thus reducing turbulence generation. When the airflow enters the gradually decreasing pickup channel 101, the continuous contraction of the aperture causes the flow cross-sectional area to decrease uniformly along the extension direction of the pickup channel 101. This results in a uniform and stable reduction in airflow velocity, with no sudden velocity changes throughout the deceleration process. This uniform deceleration avoids inertial impacts caused by sudden velocity changes, reducing the probability of separation between the airflow and the inner wall of the pickup channel 101, thereby reducing the basis for turbulence generation at its source.

[0035] It should be noted that the generation of turbulence is often related to abrupt changes in the airflow motion. The pickup channel 101 has a continuously tapering structure with a gradually decreasing aperture in the direction towards the microphone body 22, which allows the airflow to maintain a stable motion state and avoids the generation of new turbulence. The airflow flows along the curved inner wall of the smoothly extending pickup channel 101, and the direction of motion is always consistent with the central axis of the pickup channel 101. It will not change direction due to abrupt changes in the steps, thus avoiding the formation of vortices.

[0036] Even if there is a small initial turbulence at the entrance of the pickup channel 101, energy dissipation will occur due to continuous wall friction and airflow compression within the gradually narrowing pickup channel 101. After passing through the gradually narrowing pickup channel 101, the energy attenuation prevents it from forming an effective turbulent impact. Furthermore, the continuously narrowing pickup channel 101 exerts a continuous compression effect on the airflow. During the compression process, the small turbulence is stretched and decomposed, transforming from an irregular vortex shape into a gentle airflow mass, further reducing energy, thus continuously dissipating energy. Finally, the airflow reaching the diaphragm of the microphone body 22 has reduced to an extremely low level in terms of both velocity and turbulence intensity, failing to effectively impact the diaphragm. This fundamentally suppresses wind noise generation, effectively improves the wind noise resistance of the microphone assembly 20, enhances the pickup effect, and greatly improves the user experience.

[0037] In some embodiments, the central axis of the first pickup hole 1011 and the central axis of the second pickup hole 1012 coincide, thereby effectively eliminating airflow turbulence and sound reflection at the junction between the two ends of the first pickup hole 1011 and the second pickup hole 1012 that are close to each other. This results in the pickup channel 101 having a continuous and unbiased acoustic path. This works in synergy with the structure in which the apertures of the first pickup hole 1011 and the second pickup hole 1012 are stepped with decreasing apertures in the direction toward the microphone body 22, or the pickup channel 101 is set with gradually decreasing apertures in the direction toward the microphone body 22. This avoids the failure of wind noise resistance and the decrease in pickup quality caused by the offset of the central axis of the first pickup hole 1011 and the second pickup hole 1012, thereby improving the pickup accuracy and stability of the electronic device 100.

[0038] However, regardless of whether the pickup channel 101 has a gradually decreasing aperture or a stepped diameter reduction structure, its core principle is to achieve airflow deceleration and turbulence suppression through continuous aperture changes. If the central axis of the first pickup hole 1011 and the central axis of the second pickup hole 1012 are offset from each other, the gradient continuity of the aperture change will be disrupted. This will cause a local enlargement or reduction in the actual aperture at the junction of the first pickup hole 1011 and the second pickup hole 1012, destroying the original gradual or gradient structure and causing a sudden change in airflow velocity at that location, thus weakening the deceleration effect. Therefore, aligning the central axis of the first pickup hole 1011 and the central axis of the second pickup hole 1012 ensures the continuity of the aperture change, guarantees uniform deceleration of the airflow along the pickup channel 101, avoids inducing new airflow turbulence, ensures the turbulence suppression effect, and ensures the wind noise resistance of the microphone assembly 20.

[0039] Furthermore, the second pickup hole 1012 includes a first hole 1012a and a second hole 1012b that are connected to each other. The circuit board assembly 21 includes a circuit board 211 and a back plate 212, and the microphone body 22 is disposed on the back plate 212. The main material of the back plate 212 is silicon, and it has good conductivity through doping or deposition of conductive layers. It can form a parallel plate capacitor together with the diaphragm on the microphone body 22 to realize the conversion of sound signals to electrical signals.

[0040] The circuit board 211 is connected to the housing 10 and has a first hole 1012a. The back electrode plate 212 is connected to the side of the circuit board 211 facing away from the first pickup hole 1011 and has a second hole 1012b, the diameter of which is smaller than that of the first hole 1012a. Since the circuit board 211 is connected to the housing 10, opening the first hole 1012a only requires adding a drilling process to the existing processing flow of the circuit board 211, without additional process costs. When opening the second hole 1012b of the back electrode plate, the processing flow of the back electrode plate 212 can also be completed simultaneously with the processing flow of the back electrode plate 212, avoiding secondary processing. With this configuration, relying on the inherent structure of the circuit board 211 and the back electrode plate 212 for layered opening, the components of the circuit board assembly 21 can be directly used as the carrier of the second pickup hole 1012, eliminating the need for the design and assembly of additional acoustic components and saving processing and assembly costs.

[0041] Meanwhile, the aperture of the second hole 1012b can change in a stepwise manner or gradually compared to the aperture of the first hole 1012a, so that the aperture of the second pickup hole 1012 can be reduced in the direction of extension toward the microphone body 22. This satisfies the requirement that the aperture of the pickup channel 101 is reduced in the direction of extension toward the microphone body 22, thereby achieving the wind noise resistance of the microphone assembly 20, improving pickup sensitivity, and reducing signal loss.

[0042] In some embodiments, the electronic device 100 further includes a first mesh assembly 30 and a second mesh assembly 40. The first mesh assembly 30 is disposed on the side of the housing 10 facing away from the microphone assembly 20 and covers one end of the first pickup hole 1011. It can prevent large impurities such as dust, sand, hair, and water droplets from entering the first pickup hole 1011, thus preventing impurities from clogging the pickup channel 101 or adhering to the diaphragm surface of the microphone body 22, which would lead to a decrease in pickup sensitivity. The second mesh assembly 40 is disposed between the housing 10 and the microphone assembly 20 and covers the other end of the first pickup hole 1011. It can further intercept small impurities that are not blocked by the first mesh assembly 30, achieving a dual protection effect for the pickup channel 101 and further reducing the intrusion of impurities.

[0043] Through the porous structure of the first mesh component 30 and the second mesh component 40, the first mesh component 30 can disperse the concentrated airflow entering the pickup channel 101 from the outside into dispersed micro airflows, initially weakening the impact intensity of the airflow and reducing the basis for turbulence generation entering the first pickup hole 1011; the second mesh component 40 further disperses and weakens the remaining multiple small turbulences, transforming them into a smoother laminar airflow.

[0044] The second mesh assembly 40 includes a steel mesh 41, a first adhesive 42, and a second adhesive 43. The housing 10 is bonded to the steel mesh 41 by the first adhesive 42, and the circuit board assembly 21 is bonded to the steel mesh 41 by the second adhesive 43. This achieves a seal in the middle section of the pickup channel 101, preventing airflow from bypassing the pickup channel 101 through the gap between the housing 10 and the circuit board assembly 21 and directly impacting the microphone body 22. At the same time, it prevents moisture from seeping into the microphone body 22 through the gap between the housing 10 and the circuit board assembly 21.

[0045] The first adhesive component 42 and the second adhesive component 43 can be double-sided adhesive or similar materials, which can stably fix the housing 10, the second mesh assembly 40, and the microphone assembly 20 relative to each other, resulting in high structural stability and preventing displacement or loosening, thus ensuring good sound pickup performance. Furthermore, the first adhesive component 42 is positioned around the outer periphery of the first pickup hole 1011, and the second adhesive component 43 is positioned around the outer periphery of the second pickup hole 1012. The first adhesive component 42 and the second adhesive component 43 do not intrude into the pickup channel 101, thereby avoiding obstruction or interference with airflow propagation and sound signal transmission. This also prevents the airflow from colliding with the first adhesive component 42 and the second adhesive component 43 and causing airflow separation, thus preventing the regeneration of turbulence and providing crucial assurance for the sound pickup stability of the microphone assembly 20. Simultaneously, it ensures the effectiveness of the microphone assembly 20's wind noise resistance.

[0046] Furthermore, the first mesh component 30 includes a first sub-mesh 31 and a second sub-mesh 32. The first sub-mesh 31, the second sub-mesh 32, and the steel mesh 41 can be stainless steel sheets made by etching processes (such as chemical etching or laser etching), and multiple through holes are spaced apart on the stainless steel sheets. The arrangement and number of through holes can be specifically required according to the actual application scenario of the electronic device 100. In addition, the shape of the through holes includes, but is not limited to, circles, ellipses, racetracks, or other irregular shapes, so as to achieve precise interception of impurities and uniform dispersion of airflow, and suppress wind noise.

[0047] Alternatively, the first sub-net 31, the second sub-net 32, and the steel mesh 41 can also be made using a steel wire weaving process. The diameter of the steel wire is between 0.01mm and 5mm. The weaving process includes, but is not limited to, vertical crossing of warp and weft threads, oblique crossing, and vertical crossing. The number of layers should be between 2 and 10. For example, if the steel wires cross vertically along the warp and weft threads, it is considered to be woven into 2 layers. The mesh count of the steel mesh 41 is between 10 and 800 meshes. By using multiple layers, the strength and density of the first sub-net 31, the second sub-net 32, and the steel mesh 41 can be increased, achieving strong interception of large-sized impurities and sufficient dispersion of airflow. This is suitable for electronic devices 100 that require high protection and impact resistance, such as sports headphones and outdoor recording equipment.

[0048] Understandably, the first mesh assembly 30 also includes a third adhesive 33 and a fourth adhesive 34. The third adhesive 33 is bonded between the first sub-mesh 31 and the second sub-mesh 32, and the second adhesive 34 is bonded between the second sub-mesh 32 and the housing 10, making the connection between the first sub-mesh 31 and the second sub-mesh 32, and between the second sub-mesh 32 and the housing 10, more secure. At the same time, the high adhesion and slight compressive deformation capability of the third adhesive 33 and the fourth adhesive 34 compensate for the thickness deviation between the first sub-mesh 31 and the second sub-mesh 32, and ensure that the second sub-mesh 32 is tightly attached to the surface of the housing 10, preventing airflow from leaking directly into the pickup channel 101 from between the first sub-mesh 31 and the second sub-mesh 32, or from between the second sub-mesh 32 and the housing 10, thus improving the overall airtightness of the structure. These unfiltered and undispersed airflows would carry impurities into the pickup channel 101 and form strong turbulence, directly weakening the protective and wind noise reduction effect of the first mesh assembly 30. The number of layers, mesh count, and manufacturing process of the first sub-mesh 31 and the second sub-mesh 32 can be the same as or different from the steel mesh 41 of the second mesh component 40. This application does not impose any restrictions on this.

[0049] In some embodiments, the electronic device 100 further includes a reinforcing plate 50, which is disposed between the second mesh assembly 40 and the circuit board assembly 21. The reinforcing plate 50 can be fixedly connected to the circuit board 211 by means of bonding, screwing, or other connection methods, and the reinforcing plate 50 can also be fixedly connected to the steel mesh 41 by a second adhesive member 43. The reinforcing plate 50 is used to reinforce the circuit board 211, compensate for the rigidity defects of the circuit board 211, and optimize the connection reliability between the second mesh assembly 40 and the circuit board assembly 21. Therefore, the reinforcing plate 50 can be made of high-strength metal materials (such as stainless steel or aluminum alloy) or high-strength engineering plastics (such as PI polyimide or PPS polyphenylene sulfide).

[0050] It should be noted that the reinforcing plate is 50. A through hole needs to be provided, which is interconnected with both the first pickup hole 1011 and the second pickup hole 1012, so that together with the first pickup hole 1011 and the second pickup hole 1012, they form a pickup channel 101 and ensure that the pickup channel 101 is unobstructed. Furthermore, the diameter of the through hole at the end away from the microphone body 22 should be smaller than the diameter of the first pickup hole 1011 at the end near the microphone body 22, and the diameter of the through hole at the end near the microphone body 22 should be larger than the diameter of the first hole 1012a at the end away from the microphone body 22. This makes the diameter of the through hole decrease in the direction toward the microphone body 22, which satisfies the requirement that the diameter of the pickup channel 101 decreases in the direction toward the microphone body 22. This allows for flow restriction and deceleration during the airflow entering the pickup channel 101, thereby significantly reducing the impact energy of the wind in the pickup channel 101, reducing wind noise, and improving the wind noise resistance and pickup effect of the microphone assembly 20.

[0051] In one embodiment, please refer to Figures 3 to 6 The figure exemplifies an embodiment of an electronic device 100 as headphones. The headphones can be in-ear, open-back, or over-ear, etc. The headphones include a housing 10, a microphone assembly 20, and a speaker unit. The speaker unit is disposed within the housing 10, dividing the internal space of the housing 10 into a front cavity and a rear cavity. Since headphones have various structural and functional types, the microphone assembly 20 can be matched to different headphone forms with different functions. The microphone assembly 20, based on its function, includes a feed-forward microphone (FF-mic), a feedback microphone (FB-mic), and a talk microphone.

[0052] A feedforward microphone is typically positioned on the outer edge of the housing 10 to collect audio signals from the external environment of the electronic device 100. In headphones with active noise cancellation, the feedforward microphone can detect noise in the external environment in advance and generate corresponding reverse sound waves to cancel out this noise, thereby achieving a noise reduction effect. A feedback microphone is located inside the housing 10 to collect audio signals from inside the headphones. In headphones with active noise cancellation, the feedback microphone can detect residual noise after it has been processed inside the headphones and perform secondary noise reduction processing. The feedback microphone can also be used to detect the wearing status of the headphones, for example, by collecting friction sounds within the ear canal to determine if the headphones are worn correctly. A call microphone is typically located on the outer edge of the headphones. It is used to collect the user's voice during calls. During a call, the call microphone can provide a clear voice signal to ensure call quality.

[0053] Hereinafter, an embodiment of the electronic device 100 including headphones will be described in detail.

[0054] The housing 10 has a sound outlet 11 connected to the front cavity. A first pickup hole 1011 is connected to the sound outlet 11. The microphone assembly 20 can serve as a feedback microphone to collect audio signals from inside the headphones. Specifically, the housing 10 includes a housing body 12 and a mounting portion 13 extending toward the central axis of the sound outlet 11. A first mesh assembly 30 and a second mesh assembly 40 are respectively connected to opposite sides of the mounting portion 13. The mounting portion 13 has a first pickup hole 1011. The outer wall of the mounting portion 13 and the inner wall of the housing body 12 also cooperate to form a receiving groove 14. The first sub-mesh 31 of the first mesh assembly 30 can be a mesh cover, and the mesh cover can extend into the receiving groove 14 to further improve airtightness, thereby improving the overall wind noise reduction effect of the microphone assembly 20.

[0055] In addition, a support member 15 is provided on the mounting part 13. The support member 15 is located between the mounting part 13 and the first mesh assembly 30. The support member 15 can be integrally molded with the mounting part 13 by injection molding or other methods, or it can be connected to the mounting part 13 by bonding, snap-fitting, or other methods. The materials of the support member 15 include, but are not limited to, plastics (such as PC, PET, PP, etc.), sound-absorbing sponge, porous media, and zeolite, which can fill the gap between the first mesh assembly 30 and the mounting part 13, improve airtightness, and prevent the first mesh assembly 30 from collapsing due to assembly pressure or long-term use, thus affecting the sound pickup effect of the pickup channel 101. When the support member 15 is made of sound-absorbing sponge or silicone, due to its elasticity, it can also absorb the vibration energy generated when the microphone assembly 20 is working, prevent the vibration from being transmitted to the entire housing 10, and reduce the intensity of vibration noise, further improving the user experience.

[0056] The first mesh assembly 30 has a sound-emitting surface 30a on the side facing away from the microphone assembly 20. The normal of the sound-emitting surface 30a is set at an angle to the central axis of the first pickup hole 1011. When external sound waves enter the first pickup hole 1011 from the sound-emitting surface 30a, due to the change in the sound transmission path of the first pickup hole 1011, only sound waves propagating along the central axis of the first pickup hole 1011 can enter efficiently, while random wind noise waves with random directions and turbulent flow will be filtered out due to path mismatch. The root cause of wind noise is turbulence, and the direction of turbulence is random. When the central axis of the first pickup hole 1011 forms an angle with the vertical line of the sound output surface 30a, the turbulent airflow enters the first pickup hole 1011 and will be resisted by the active change of the sound transmission path of the first pickup hole 1011. The large-sized turbulence caused by the vortex formed by the strong wind is difficult to follow the change of path due to inertia and will first hit the wall and dissipate in the first pickup hole 1011. The small-sized turbulence after entering will have its kinetic energy attenuated due to the change of path and will be difficult to effectively impact the diaphragm of the microphone assembly 20, thus significantly reducing the intensity of wind noise.

[0057] It is understandable that the central axis of the first pickup hole 1011 can also coincide with the normal of the sound output surface 30a, while the central axis of the second pickup hole 1012 is set at an angle to the normal of the sound output surface 30a. When the sound wave enters the second pickup hole 1012 through the first pickup hole 1011, the sound transmission path of the second pickup hole 1012 changes direction. Similarly, the angle design can actively generate a change in the sound wave path, which not only avoids the indiscriminate entry of wind noise, but also breaks the resonance condition of turbulence, thereby greatly improving the wind noise reduction effect.

[0058] Furthermore, the central axis of the pickup channel 101 is set at an angle to the central axis of the sound outlet 11. That is, the central axis of the first pickup outlet 1011 coincides with the central axis of the second pickup outlet 1012, and both are set at an angle to the central axis of the sound outlet 11. This arrangement changes the direction of sound wave propagation between the pickup channel 101 and the sound outlet 11, optimizing the sound wave propagation path and reducing reflection and interference during propagation. For example, in an in-ear headphone, the sound outlet 11 is aligned with the user's ear canal, primarily transmitting the audio signal from the speaker unit; while if the microphone assembly 20 needs to collect ambient sound from outside the headphones for feedforward ANC noise reduction, the central axis of the pickup channel 101 is angled to the sound outlet 11, pointing towards the outside of the headphone housing 10. This reduces interference from reflected sound waves within the ear canal and improves the signal-to-noise ratio of ambient sound acquisition. The included angle can be adjusted according to specific application requirements. For example, in some headphone designs, the included angle may be set to 45° to optimize the direction of sound propagation and the user's listening experience.

[0059] For headphones, the microphone assembly 20, as a call microphone, also needs to take into account the call function. The central axis of the pickup channel 101 is set at an angle of 45° to 60° with the central axis of the sound outlet 11, so that the pickup direction of the pickup channel 101 is towards the user's mouth rather than the ear canal. This can enhance the directional pickup capability of human voice, reduce the mixing of ambient noise (such as the voices of people around), and greatly improve the call clarity.

[0060] In addition, when the wind passes through the pickup channel 101, the turbulent energy of the wind will be partially dispersed due to the change in the direction of sound wave propagation, preventing the wind from directly impacting the pickup channel 101, reducing the generation of wind noise, thereby significantly improving the device's wind noise resistance and enabling the device to maintain high audio quality when used outdoors.

[0061] In the form of a feedforward microphone, microphone assembly 20, such as Figure 5 and Figure 6As shown, the housing 10 is provided with a mounting groove 16, which is connected to the outside. The microphone assembly 20 is disposed in the mounting groove 16, and the first pickup hole 1011 is connected to the mounting groove 16 so that the first pickup hole 1011 can be connected to the outside through the mounting groove 16, detect noise in the external environment, and generate corresponding reverse sound waves to cancel out the noise, thereby achieving a noise reduction effect.

[0062] In the wind noise reduction test, electronic device 100 was used as headphones and worn by the user's ears, such as Figure 7 The figure shows a comparison curve of the frequency response of the electronic device 100 when subjected to wind directly opposite the pickup channel 101; as shown. Figure 8 As shown, this is a comparison curve of the frequency response of the electronic device 100 when tested under wind conditions at a 45° angle to the centerline of the pickup channel 101; Figure 9 The diagram shows a frequency response comparison curve of the electronic device 100 under a wind force at a 90° angle to the centerline of the pickup channel 101. L1 represents the frequency response comparison curve of the electronic device 100 in this embodiment, and L2 represents the frequency response comparison curve of an electronic product in the prior art.

[0063] In the low-frequency range (20Hz - 500Hz), L1 has a significantly lower sound pressure level than L2, resulting in better suppression of low-frequency wind noise. In the mid-high frequency range (500Hz - 8kHz), L1 is smoother in this range, so it has less impact on the frequency response of speech or music in terms of suppressing wind noise, resulting in a more natural listening experience. In the high-frequency range (>8kHz), the impact of wind noise is reduced, but the high-frequency sensitivity and anti-interference ability of the headphones will be reflected. L1 has less high-frequency fluctuation, so it will not cause high-frequency signal disorder, resulting in clearer sound and a better user experience.

[0064] In summary, the electronic device 100 of this application embodiment can effectively suppress wind noise interference with audio signals, especially in the low-frequency range where wind noise is concentrated, while maintaining stability in the mid-to-high frequency range. This reduces sound distortion caused by wind noise or structural defects, resulting in more accurate audio reproduction and a more natural listening experience. Furthermore, regardless of wind direction changes (e.g., headwind, crosswind, or front wind), overall performance fluctuations are minimal, making it suitable for various complex outdoor environments and significantly enhancing the user experience.

[0065] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0066] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electronic device, characterized in that, include: The housing is provided with a first pickup hole; as well as A microphone assembly is disposed within the housing. The microphone assembly includes a circuit board assembly and a microphone body. The circuit board assembly is connected to the housing and is provided with a second pickup hole, wherein the second pickup hole communicates with the first pickup hole and the two cooperate to form a pickup channel. The microphone body is disposed on the side of the circuit board assembly opposite to the first pickup hole and is used to pick up sound signals transmitted through the pickup channel. The aperture of the pickup channel is reduced in the direction toward the microphone body.

2. The electronic device as claimed in claim 1, characterized in that, In the direction toward the microphone body, the first pickup hole is in a stepped shape with a reduced aperture; And / or, in the direction toward the microphone body, the second pickup hole is in a stepped shape with a reduced aperture.

3. The electronic device as claimed in claim 1, characterized in that, The pickup channel is arranged in a stepped shape with a reduced aperture in the direction toward the microphone body.

4. The electronic device as claimed in claim 1, characterized in that, The central axis of the first pickup hole coincides with the central axis of the second pickup hole.

5. The electronic device as claimed in claim 1, characterized in that, The second pickup hole includes a first hole and a second hole that are connected to each other. The circuit board assembly includes a circuit board and a back electrode plate. The microphone body is disposed on the back electrode plate. The circuit board is connected to the housing and is provided with the first hole. The back electrode plate is connected to the side of the circuit board facing away from the first pickup hole and is provided with the second hole. The diameter of the second hole is smaller than the diameter of the first hole.

6. The electronic device as claimed in claim 1, characterized in that, It also includes a first mesh assembly, which is disposed on the side of the housing facing away from the microphone assembly and covers one end of the first pickup hole.

7. The electronic device as claimed in claim 6, characterized in that, The first mesh assembly has a sound-emitting surface on the side facing away from the microphone assembly, and the normal of the sound-emitting surface is set at an angle to the central axis of the first pickup hole.

8. The electronic device as claimed in claim 1, characterized in that, It also includes a second mesh assembly disposed between the housing and the microphone assembly, and covering the other end of the first pickup hole.

9. The electronic device as claimed in claim 8, characterized in that, The second mesh assembly includes a steel mesh, a first adhesive member, and a second adhesive member. The housing is bonded to the steel mesh via the first adhesive member, and the first adhesive member is arranged around the outer periphery of the first pickup hole. The circuit board assembly is bonded to the steel mesh via the second adhesive member, and the second adhesive member is arranged around the outer periphery of the second pickup hole.

10. The electronic device as claimed in claim 8, characterized in that, It also includes a reinforcing plate disposed between the second mesh assembly and the circuit board assembly.

11. The electronic device according to any one of claims 1 to 10, characterized in that, The electronic device includes an earphone, which includes the housing, the microphone assembly, and the speaker unit. The speaker unit is disposed within the housing, and the internal space of the housing is divided into a front cavity and a rear cavity. The housing is provided with a sound outlet, which is connected to the front cavity, and the first pickup hole is connected to the sound outlet.

12. The electronic device according to any one of claims 1 to 6, characterized in that, The electronic device includes an earphone, which includes a housing and a microphone assembly. The housing has a mounting slot that communicates with the outside. The microphone assembly is disposed in the mounting slot, and the first pickup hole communicates with the mounting slot.

13. The electronic device as claimed in claim 11, characterized in that, The central axis of the pickup channel is set at an angle to the central axis of the sound outlet.

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