Open type wearable noise reduction earphone

Abstract

The invention discloses an open type wearable noise reduction earphone, and relates to the field of earphones. The earphone shell is provided with a pickup hole; the pickup hole is positioned on the inner side of the earphone shell; the microphone is arranged in the earphone shell and corresponds to the pickup hole; the noise reduction net-shaped structure is connected with the earphone shell and shields the pickup hole; and the noise reduction net structure is positioned on one side, close to the pickup hole, of the microphone. According to the microphone, the pickup hole is shielded by the noise reduction net structure, voice sound waves are allowed to pass through, the sensitivity of the microphone to effective voice signals is not remarkably reduced, and tone quality degradation or algorithm compensation requirement increase caused by blockage of a pickup channel is avoided; and the direct impact of wind noise on the microphone is avoided, physical weakening and energy dissipation are carried out on the airflow entering the pickup channel, and the influence of the wind noise on the pickup of the microphone is reduced from the structural level, so that the call quality in a wind noise scene is effectively improved on the premise of not influencing the open wearing experience.

Description

Technical Field

[0001] This application relates to the field of headphone technology, and more particularly to an open-back wearable noise-canceling headphone. Background Technology

[0002] With the development of wearable audio devices, open-back stereo (OWS) headphones have gained widespread popularity in recent years due to their advantages such as comfortable wear, lightweight design, and ability to allow wearers to perceive ambient sounds, as they can be worn without sealing the ear canal. Compared to traditional in-ear TWS headphones or closed-back headphones, OWS headphones exert less pressure on the ear canal during extended wear, making them more suitable for sports, commuting, and outdoor use, while also improving wearer safety in complex environments.

[0003] However, precisely because OWS headphones employ an open-back design, their microphones are more easily exposed to the external environment during use. When users are walking, cycling, or in outdoor environments with air turbulence, wind noise directly affects the microphone's pickup area, generating random and high-amplitude air pressure interference signals. This masks effective voice information, leading to decreased voice clarity and poor call quality during calls, and in severe cases, even affecting the normal call experience.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] The technical problem to be solved by this application is to provide an open-type wearable noise-canceling headphone that aims to reduce wind noise, in order to address the above-mentioned deficiencies of the prior art.

[0006] The technical solution adopted by this application to solve the technical problem is as follows: An open-back wearable noise-canceling headphone, comprising: Earphone shell; the earphone shell is provided with a sound pickup hole; the sound pickup hole is located on the inside of the earphone shell so as to be close to the concha and concha cavity area when worn; A microphone is located inside the earphone shell and corresponds to the sound pickup hole; A noise-canceling mesh structure is connected to the earphone shell and blocks the microphone hole; the noise-canceling mesh structure is located on the side of the microphone closer to the microphone hole.

[0007] The open-back wearable noise-canceling headphones, wherein the noise-canceling mesh structure includes: Multiple noise reduction meshes are arranged sequentially along the direction of the microphone and the pickup hole; each pair of adjacent noise reduction meshes are staggered and have gaps between them.

[0008] The aforementioned open-back wearable noise-canceling headphones also include: A speaker is disposed inside the earphone shell; A sound outlet is provided on the earphone shell and located on the inner side of the earphone shell; the pickup hole and the sound outlet are located on the same side of the earphone shell.

[0009] The aforementioned open-back wearable noise-canceling headphones also include: Ear hooks are connected to the earphone shell; The pickup hole is located on the side of the earphone shell near the ear hook along the center line.

[0010] The aforementioned open-back wearable noise-canceling headphones also include: A first cavity is disposed inside the earphone shell; the speaker is located inside the first cavity, and the sound outlet is connected to the first cavity; The second cavity is disposed inside the earphone shell and is arranged adjacent to and isolated from the first cavity; the microphone is located in the second cavity, and the pickup hole is connected to the second cavity.

[0011] The aforementioned open-back wearable noise-canceling headphones also include: An isolation bracket is disposed inside the earphone shell and located between the speaker and the microphone.

[0012] The open-type wearable noise-canceling headphones, wherein the isolation bracket is a planar isolation bracket or a curved isolation bracket.

[0013] The aforementioned open-back wearable noise-canceling headphones also include: A speaker bracket is disposed inside the earphone shell; the speaker is disposed on the speaker bracket; A first buffer layer is disposed around the outer surface of the speaker bracket.

[0014] The aforementioned open-back wearable noise-canceling headphones also include: A second buffer layer is disposed around the outer surface of the microphone.

[0015] Beneficial effects: This application uses a noise-reducing mesh structure to block the microphone hole, which allows voice waves to pass through without significantly reducing the microphone's sensitivity to effective voice signals, avoiding sound quality degradation or increased algorithm compensation requirements caused by microphone channel blockage; it also prevents wind noise from directly impacting the microphone, physically weakening and dissipating the airflow entering the microphone channel, reducing the impact of wind noise on microphone pickup from a structural level, thereby effectively improving call quality in windy scenarios without affecting the open-fit wearing experience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the open-back wearable noise-canceling headphones in this application; Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a schematic diagram of the noise reduction network in this application; Figure 4 This is a schematic diagram of the noise reduction mesh structure when there are two noise reduction meshes in this application; Figure 5 The diagram in the middle shows the structure of the noise reduction mesh when there are three noise reduction meshes in this application. Figure 6 This is a side view of the noise reduction mesh structure in this application; Figure 7 Based on the open-back wearable noise-canceling headphones provided in this application, the measured microphone frequency spectrum of human voice under wind noise is shown. Figure 8 This is a frequency spectrum diagram of human voice under wind noise, based on existing headphone technology and actual measurement of microphone. Figure 9 This is a comparison chart of the frequency response between the microphone and the sampled signal in actual measurements based on the open-back wearable noise-canceling headphones provided in this application. Detailed Implementation

[0017] The embodiments of this application will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be understood that the preferred embodiments are only for illustrating this application and are not intended to limit the scope of protection of this application.

[0018] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0019] This application provides an open-back wearable noise-canceling headphone, such as Figure 1 and Figure 2As shown, the open-back wearable noise-canceling headphones include an earphone shell 1, a microphone 2, and a noise-canceling mesh structure 3; the earphone shell 1 is provided with a pickup hole (not shown in the figure); the microphone 2 is located inside the earphone shell 1 and corresponds to the pickup hole; the noise-canceling mesh structure 3 is connected to the earphone shell 1 and blocks the pickup hole; the noise-canceling mesh structure 3 is located on the side of the microphone 2 near the pickup hole.

[0020] Specifically, the pickup hole is located on the earphone shell 1, and the microphone 2 corresponds to the pickup hole, thus communicating with the outside world through the pickup hole; the noise-reducing mesh structure 3 is located on the side of the microphone 2 closest to the pickup hole and blocks the pickup hole, so that all airflow and sound waves entering the pickup hole must first pass through the noise-reducing mesh structure 3 before acting on the diaphragm of the microphone 2. The bamboo-like structure of the noise-reducing mesh 3 blocks and diverts the airflow, and the airflow is divided into multiple smaller airflow units in the mesh, so that the originally concentrated and large-amplitude wind noise and air pressure disturbances are transformed into multiple small-amplitude weak pressure fluctuations.

[0021] Therefore, in this application, the noise-reducing mesh structure 3 is used to block the microphone hole, which allows the voice sound wave to pass through without significantly reducing the sensitivity of the microphone 2 to the effective voice signal, thus avoiding the sound quality degradation or increased algorithm compensation requirements caused by the blockage of the microphone channel. At the same time, it prevents wind noise from directly impacting the microphone 2, physically weakens and dissipates the airflow entering the microphone channel, and reduces the impact of wind noise on the microphone 2's sound pickup from a structural level. Thus, without affecting the open-fit wearing experience, it effectively improves the call quality in windy scenarios.

[0022] It is understandable that dust filters can be installed at the sound outlet 5 and the pickup hole to reduce dust entering the earphone shell 1. The microphone 2 can be a MEMS (Micro Electro Mechanical System) microphone 2, an ECM (Electret Condenser Microphone) microphone 2, or other microphone 2; this application does not impose specific limitations on the type or size of the microphone 2.

[0023] One embodiment of this application, such as Figure 4 , Figure 5 and Figure 6 As shown, the noise reduction mesh structure 3 includes multiple noise reduction meshes 31, which are arranged sequentially along the direction of the microphone 2 and the pickup hole; as shown... Figure 6 As shown, each pair of adjacent noise reduction nets 31 are staggered and have gaps between them.

[0024] Specifically, the noise reduction mesh structure 3 is not a single-layer mesh, but a multi-layer mesh pickup structure with thickness, path length and internal space composed of multiple noise reduction meshes 31, forming a non-straight-through pickup channel between the pickup hole and the microphone 2.

[0025] When turbulent wind noise enters through the pickup hole, if only a single layer of noise reduction mesh 31 is used, the wind noise may still act on the microphone 2 in the form of a large air pressure disturbance. However, in this embodiment, the wind noise needs to pass through multiple noise reduction meshes 31 in sequence, and its effect is decomposed into multiple continuous processes. This breaks down the originally concentrated and transient air pressure impact into multiple airflow actions with smaller amplitudes. Furthermore, the multiple noise reduction meshes 31 are staggered, which prevents the airflow from passing through each layer of mesh in a straight line. The flow direction must be changed continuously between different mesh layers. As a result, after the large-scale turbulence is divided in the first layer of mesh, it will be further torn and scattered in the subsequent staggered meshes. This continuously destroys the phase correlation of the airflow, and the airflow before reaching the microphone 2 no longer has the concentration and synchronicity of the original wind noise.

[0026] It should be noted that the adjacent noise reduction nets 31 are not in direct contact, but are arranged with gaps to form a small vortex that causes friction and collisions, so that the kinetic energy of the airflow is continuously consumed in multiple frictions and collisions, and the energy is gradually converted into weak heat energy and dissipated. When the airflow reaches the diaphragm surface of the microphone 2, only a weak pressure fluctuation with extremely small amplitude, random direction and asynchronousity remains.

[0027] In addition, the misalignment between two adjacent noise reduction meshes 31 can be misalignment along the length direction of the earphone shell 1 or misalignment along the width direction of the earphone shell 1, as long as the meshes of two adjacent noise reduction meshes 31 do not overlap.

[0028] As can be seen, this embodiment constructs a multi-layer mesh cavity sound pickup structure by arranging multiple noise reduction meshes 31 sequentially along the sound pickup direction and using staggered settings and interlayer gaps between adjacent noise reduction meshes 31. This allows wind noise to be split, dissipated, and decohered before entering the microphone 2, thereby transforming the originally concentrated wind noise impact into weak and dispersed pressure fluctuations, significantly improving the sound pickup quality in wind noise scenarios.

[0029] The structure of a single noise reduction network 31 is as follows: Figure 3 As shown; when there are two noise reduction meshes 31 in the noise reduction mesh structure 3, the usage state of the two noise reduction meshes 31 arranged in a staggered manner is as follows. Figure 4 As shown; when there are three noise reduction meshes 31 in the noise reduction mesh structure 3, the usage state of two adjacent noise reduction meshes 31 being staggered is as follows. Figure 5 As shown.

[0030] The inventors of this application, through further research, discovered that existing headphone structures typically employ the following layout: The speaker 4's corresponding sound outlet 5 is located on the inner side of the earphone shell 1 (the side that fits against the ear) to directly transmit sound into the ear canal; while the microphone 2's corresponding pickup hole is located on the side of the earphone shell 1 adjacent to the sound outlet 5 or even on the outer side of the earphone shell 1 to collect ambient sound or call voice. Although the above structure is relatively intuitive in terms of functional division, in actual use, the pickup hole is directly exposed to the external environment, and is easily affected by wind noise when walking, cycling, or using outdoors, resulting in obvious low-frequency wind noise components in the picked-up signal and a decrease in signal-to-noise ratio; furthermore, the pickup hole is far from the ear structure, mainly picking up mixed external sounds, making it difficult to effectively enhance the voice components emitted from the wearer's ear or near the head, which is not conducive to improving call clarity.

[0031] Based on this, one embodiment of this application, such as Figure 1 As shown, the open-back wearable noise-canceling headphones also include a speaker 4 and a sound outlet 5; the speaker 4 is disposed inside the headphone shell 1; the sound outlet 5 is disposed on the headphone shell 1 and located on the inner side of the headphone shell 1; the pickup hole and the sound outlet 5 are located on the same side of the headphone shell 1.

[0032] Specifically, in this embodiment, the sound outlet 5 is still located on the inner side of the earphone shell 1, while the pickup hole and the sound outlet 5 are located on the same side of the earphone shell 1 and are both arranged on the inner side of the earphone (the side that fits the ear). When the user wears the earphone, the pickup hole can be arranged close to the concha and concha cavity area of ​​the ear.

[0033] With the pickup hole positioned on the inner side of the ear, the antihelix, scaphoid fossa, helix, and tragus of the ear form a natural physical shield around the hole, effectively reducing the impact of direct airflow on it and structurally minimizing wind noise interference without the need for additional complex windproof components. The proximity of the pickup hole to the cymba conchae and cavum conchae further facilitates the pickup of speech vibrations conducted within the wearer's ear and head, while relatively suppressing stray noise from the far-field environment. This increases the proportion of the speech signal and improves the overall signal-to-noise ratio. Furthermore, this application achieves wind noise reduction and enhanced sound pickup simply by altering the structural layout, improving signal quality at the source, reducing the processing load on the backend noise reduction algorithm, and contributing to lower power consumption and improved call real-time performance and stability.

[0034] It should be noted that the speaker 4 in this application can be racetrack-shaped, circular, or other irregular designs; the driving type of the speaker 4 can be moving coil, moving iron, MEMS (Micro Electro Mechanical System), or bone conduction, etc.; this application does not impose specific limitations on the shape, driving type, or size of the speaker 4.

[0035] One embodiment of this application, such as Figure 1As shown, the open-back wearable noise-canceling headphones also include a pin 8 for charging and communication of the headphones. The pin 8 is located on the same side of the headphone shell 1 as the pickup hole and the sound outlet hole 5, and the pin 8 is located on the side of the microphone 2 away from the speaker 4.

[0036] One embodiment of this application, such as Figure 1 As shown, the open-back wearable noise-canceling headphones also include an ear hook 9; the ear hook 9 is connected to the headphone shell 1; the pickup hole is located on the side of the headphone shell 1 near the ear hook 9 along the center line B.

[0037] Specifically, the center line B of the earphone shell 1 extends along its length and is located at the center of the width of the earphone shell 1. In this embodiment, the pickup hole is located on the side of the center line B of the earphone shell 1 closer to the ear hook 9, so that when worn, the pickup hole can be closer to the position of the cymba conchae and the concha cavity. The auricular structures such as the helix, scaphoid, helix and tragus form a natural wind barrier. By utilizing the shape of the auricle, the influence of wind noise on the microphone 2 can be reduced without additional structures, further improving the stability of sound pickup.

[0038] One embodiment of this application, such as Figure 1 As shown, the open-back wearable noise-canceling headphones also include a first cavity 11 and a second cavity 12; the first cavity 11 is disposed inside the headphone shell 1; the speaker 4 is located inside the first cavity 11, and the sound outlet 5 is connected to the first cavity 11; the second cavity 12 is disposed inside the headphone shell 1, and is arranged adjacent to and isolated from the first cavity 11; the microphone 2 is located inside the second cavity 12, and the sound pickup hole is connected to the second cavity 12.

[0039] Specifically, the first cavity 11 and the second cavity 12 are both located inside the earphone shell 1 and are isolated from each other and not connected. The first cavity 11 serves as an independent working space for the speaker 4, controlling the sound wave propagation path and ensuring the stability of the sound quality output; the second cavity 12 serves as an independent cavity to house the microphone 2, reducing the path of the speaker 4's vibration transmitted to the microphone 2 through the air or structure.

[0040] As can be seen, in this embodiment, the speaker 4 and the microphone 2 are housed in a first cavity 11 and a second cavity 12 that are isolated from each other, which weakens the vibration signal that was originally generated by the same earphone shell 1 between them, and avoids the vibration of the speaker 4 being directly transmitted to the microphone 2, thereby reducing the generation of nonlinear echo.

[0041] In one embodiment of this application, the speaker 4 and the microphone 2 are arranged along the length of the earphone shell 1, that is, the first cavity 11 and the second cavity 12 are arranged along the length of the earphone shell 1.

[0042] Specifically, the internal space of the earphone shell 1 is limited. Compared with the width direction, the length direction is longer, and the internal usable space is more abundant. This is conducive to increasing the physical distance between the speaker 4 and the microphone 2 within the limited size of the earphone shell 1, extending the propagation path of vibration and sound waves, reducing the acoustic coupling and structural resonance between the two, thereby reducing the nonlinear echo generated by the microphone 2 picking up the vibration of the speaker 4, while taking into account the wearing comfort and acoustic performance of open-back headphones.

[0043] The earphone shell 1, along its length, connects to the ear hook 9 at the end closest to the microphone 2. The ear hook 9 is bent and forms a U-shaped structure with the earphone shell 1 for easy placement on the ear. The speaker 4 is located on the center line B of the earphone shell 1 and is responsible for emitting sound outwards, ensuring a symmetrical sound path, uniform sound pressure distribution, and reducing the likelihood of biased distortion, thus ensuring stable sound quality. Furthermore, placing the speaker 4, as the main vibration source, on the center line B of the earphone shell 1 prevents strong vibration on one side of the earphone shell 1, thereby reducing overall asymmetrical vibration. The microphone 2 is not located on the center line B of the earphone shell 1, but rather on the side of the center line B closer to the ear hook 9. This allows the microphone 2 to actively approach the wind-resistant area of ​​the auricle and also allows the microphone 2 and speaker 4 to be relatively offset, not on the same acoustic axis. This improves the signal-to-noise ratio of the wearer's voice pickup while further reducing acoustic coupling and nonlinear echo between the microphone 2 and speaker 4.

[0044] In addition, the sound outlet 5 is arranged corresponding to the end of the first cavity 11 away from the second cavity 12 and is connected to the first cavity 11, so that the distance between the sound outlet 5 and the microphone 2 is extended, thereby reducing the echo amplitude of air conduction and preventing the risk of the microphone 2 being truncated at high volumes.

[0045] One embodiment of this application, such as Figure 1 As shown, the open-back wearable noise-canceling headphones also include an isolation bracket 6, which is disposed inside the headphone shell 1 and located between the speaker 4 and the microphone 2.

[0046] Specifically, the isolation bracket 6 forms a physical barrier between the microphone 2 and the speaker 4, isolating the earphone shell 1 and thus creating a first cavity 11 and a second cavity 12 that are not interconnected. The isolation bracket 6 prevents the vibrations generated by the speaker 4 during operation from being directly transmitted to the microphone 2 cavity through the air or structure, thereby disrupting potential cavity resonance paths. Therefore, the isolation bracket 6 physically blocks the vibration transmission between the first cavity 11 and the second cavity 12. Combined with the independent cavity design, it disrupts the resonance characteristics between the microphone 2 and the speaker 4, weakens the nonlinear signals generated by the microphone 2 picking up the operating vibrations of the speaker 4, effectively reduces nonlinear echoes, improves call quality, and maintains a simple structure, low power consumption, and wearing comfort.

[0047] In one embodiment of this application, the microphone 2 is mounted on the inner wall of the earphone shell 1.

[0048] In another embodiment of this application, the microphone 2 is mounted on the noise reduction mesh structure 3 and is mounted on the innermost noise reduction mesh 31 (i.e., the one furthest from the pickup hole and closest to the microphone 2 along the arrangement direction of the microphone 2 and the pickup hole) by a bracket, thereby reducing the direct contact between the microphone 2 and the earphone shell 1, thereby preventing the vibration or impact transmitted from the speaker 4 to the earphone shell 1 from being transmitted to the microphone 2 through the earphone shell 1, and further reducing nonlinear echo and vibration noise.

[0049] In one embodiment of this invention, the isolation bracket 6 is a planar isolation bracket 6, which has a simple design, is easy to fix and process, reduces production costs and debugging difficulty, and at the same time ensures that there is a clear boundary between the first cavity 11 and the second cavity 12.

[0050] In another embodiment of this example, the isolation bracket 6 is a curved isolation bracket 6.

[0051] It is understood that the isolation bracket 6 in this application can also adopt other shapes, as long as the side wall of the isolation bracket 6 in the circumferential direction can fit tightly with the inner wall of the earphone shell 1, thereby dividing the space inside the earphone shell 1 into independent first cavity 11 and second cavity 12.

[0052] In one embodiment of this application, the open-back wearable noise-canceling headphones further include a speaker bracket 7 and a first buffer layer; the speaker bracket 7 is disposed inside the headphone shell 1; the speaker 4 is disposed on the speaker bracket 7; and the first buffer layer is disposed around the outer surface of the speaker bracket 7.

[0053] Specifically, the speaker bracket 7 is located inside the first cavity 11 and positions and supports the speaker 4; the speaker 4 is fixedly mounted on the speaker bracket 7, so that the speaker 4 has a stable and controllable installation posture inside the earphone shell 1. A first buffer layer is disposed around the outer surface of the speaker bracket 7, and the first buffer layer can be an elastic or damping material, thereby forming a flexible connection interface with the speaker bracket 7.

[0054] In this application, the speaker 4 is the main vibration source, and the mechanical vibration generated when it is working is first transmitted to the speaker bracket 7. The first buffer layer is located at a key node in the vibration transmission path, and attenuates the vibration before it propagates further to the cavity where the earphone shell 1 and microphone 2 are located. This effectively destroys the overall resonance formed between the speaker 4, speaker bracket 7, earphone shell 1 and microphone 2, reduces nonlinear vibration components, and reduces the amplitude and complexity of nonlinear echoes from the source.

[0055] The size of the speaker bracket 7 can be reasonably designed according to the shape and structure of the speaker 4. This application does not impose specific limitations on the size of the speaker bracket 7. In order to reduce the vibration of the whole machine caused by the speaker 4, the speaker bracket 7 itself can be made of a cushioning material to ensure that the speaker bracket 7 itself has a cushioning function or a function to reduce the transmission of vibration signals.

[0056] In one embodiment of this application, the open-back wearable noise-canceling headphones further include a second buffer layer, which surrounds the outer surface of the microphone 2.

[0057] Specifically, microphone 2 is mounted on noise-reducing mesh structure 3 via a bracket. Noise-reducing mesh structure 3 first weakens large-scale turbulence in wind noise, placing microphone 2 in an area where wind speed has been significantly attenuated, reducing the possibility of wind noise directly affecting the pickup diaphragm of microphone 2. Noise-reducing mesh structure 3 may still generate minor mechanical vibrations under wind action or under the overall vibration of the headphones; while the second buffer layer, as a damping medium, absorbs and dissipates the vibrational energy transmitted to microphone 2 by noise-reducing mesh structure 3 and bracket, preventing these micro-vibrations from being mistakenly picked up by microphone 2 as low-frequency noise or nonlinear interference. At the same time, it can further reduce the nonlinear signal generated by the resonance between speaker 4 and microphone 2, thereby achieving a design that significantly reduces nonlinear echo.

[0058] In this application, by reasonably positioning the microphone 2 and the noise reduction mesh structure 3, wind noise suppression and wearer's voice pickup are optimized simultaneously without adding extra electronic components or power consumption, while maintaining wearing comfort and environmental awareness, thereby improving call quality and user experience.

[0059] The following are the human voice spectrum diagrams obtained from actual measurements under microphone wind noise corresponding to this application and under microphone 2 wind noise in existing headphones: Based on the open-back wearable noise-canceling headphones provided in this application, the measured microphone's human voice spectrum under wind noise conditions is as follows: Figure 7 As shown in the figure, the horizontal axis represents time (s) and the vertical axis represents frequency (kHz). It can be seen from the figure that the human voice harmonics are in quiet and windless conditions from 0.0s to 0.5s, and the human voice harmonics are in windy conditions from 0.5s to 6.5s. It can be seen that the human voice harmonics are still clear and complete under wind noise, and are only slightly affected by the wind. The human voice performance is good under wind noise.

[0060] Based on existing headphone technology, the measured microphone's human voice spectrum under wind noise conditions is as follows: Figure 8As shown, the horizontal axis represents time (s) and the vertical axis represents frequency (kHz). From the graph, we can see that the period from 0s to 0.5s is the harmonics of human voices in quiet, windless conditions, while the period from 0.5s to 6.5s is the harmonics of human voices in windy conditions. It can be seen that under wind noise, human voice harmonics are almost invisible, and the signals are all messy, pulse-like signals of wind noise. They are strongly affected by the wind, and the performance of human voices under wind noise is very poor.

[0061] Based on the open-back wearable noise-canceling headphones provided in this application, a comparison of the frequency response between the measured microphone and the sampled signal is shown in the figure below. Figure 9 As shown in the figure, the horizontal axis represents frequency (Hz), and the vertical axis represents amplitude (dB / Hz). In the figure, the blue signal is the echo signal received by microphone 2, and the yellow signal is the echo signal provided by the system. It can be seen from the figure that the amplitude trends of the two signals are very consistent with the frequency changes, which indicates that the two signals have high linearity, which is beneficial for echo effect processing.

[0062] 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.

[0063] 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.

[0064] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0066] 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.

[0067] Of course, the above description of the embodiments of the present invention is quite detailed, but it should not be construed as a limitation on the scope of protection of the present invention. The present invention may have many other implementations. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. An open-back wearable noise-canceling headphone, characterized in that, It includes: Earphone shell; The earphone shell is provided with a sound pickup hole; the sound pickup hole is located on the inside of the earphone shell so as to be close to the concha and concha cavity area when worn; A microphone is located inside the earphone shell and corresponds to the sound pickup hole; A noise-reducing mesh structure is connected to the earphone shell and blocks the sound pickup hole; The noise-reducing mesh structure is located on the side of the microphone closer to the pickup hole.

2. The open-back wearable noise-canceling headphones according to claim 1, characterized in that, The noise reduction mesh structure includes: Multiple noise reduction meshes are arranged sequentially along the direction of the microphone and the pickup hole; each pair of adjacent noise reduction meshes are staggered and have gaps between them.

3. The open-back wearable noise-canceling headphones according to claim 1, characterized in that, It also includes: A speaker is disposed inside the earphone shell; A sound outlet is provided on the earphone shell and located on the inner side of the earphone shell; the pickup hole and the sound outlet are located on the same side of the earphone shell.

4. The open-back wearable noise-canceling headphones according to claim 3, characterized in that, It also includes: Ear hooks are connected to the earphone shell; The pickup hole is located on the side of the earphone shell near the ear hook along the center line.

5. The open-back wearable noise-canceling headphones according to claim 3, characterized in that, It also includes: A first cavity is disposed inside the earphone shell; the speaker is located inside the first cavity, and the sound outlet is connected to the first cavity; The second cavity is disposed inside the earphone shell and is arranged adjacent to and isolated from the first cavity; the microphone is located in the second cavity, and the pickup hole is connected to the second cavity.

6. The open-back wearable noise-canceling headphones according to claim 5, characterized in that, It also includes: An isolation bracket is disposed inside the earphone shell and located between the speaker and the microphone.

7. The open-back wearable noise-canceling headphones according to claim 6, characterized in that, The isolation bracket is a planar isolation bracket or a curved isolation bracket.

8. The open-back wearable noise-canceling headphones according to claim 3, characterized in that, It also includes: A speaker bracket is disposed inside the earphone shell; the speaker is disposed on the speaker bracket; A first buffer layer is disposed around the outer surface of the speaker bracket.

9. The open-back wearable noise-canceling headphones according to claim 1, characterized in that, It also includes: A second buffer layer is disposed around the outer surface of the microphone.

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