A type of over-ear headphone, its sound-receiving structure and audio processing method

Abstract

This invention discloses a headset, its sound-receiving structure, and an audio processing method. The sound-receiving structure includes a monitoring microphone and a Bluetooth microphone, and at least one earcup body has both a monitoring microphone and a Bluetooth microphone mounted on its outer shell. In the Y direction, both the monitoring microphone and the Bluetooth microphone are located on the front side of the earcup shell. In the Z direction, the monitoring microphone and the Bluetooth microphone are located at the upper and lower parts of the earcup shell, respectively. The main axis of the monitoring microphone is parallel to the X-Y plane, and the main axis of the Bluetooth microphone is inclined downward relative to the X-Y plane and forward relative to the X-Z plane. The X, Y, and Z directions are mutually perpendicular. The sound-receiving structure of this invention is suitable for outdoor voice interaction scenarios, ensuring the quality of call or live broadcast voice without losing environmental sound information, thus achieving a balanced optimization of voice communication quality and environmental perception capability.

Description

Technical Field

[0001] This invention relates to the field of headphone technology, and more specifically, to a headband-style earcup, its sound pickup structure, and an audio processing method. Background Technology

[0002] Currently, audio playback headphones on the market are mainly divided into semi-in-ear, in-ear, and over-ear headphones. Among them, over-ear headphones rely on the structure design of the ear pads to completely cover the auricle, which has outstanding passive noise isolation performance. In addition, the internal cavity space of the ear pad shell is spacious, which can accommodate large-size sound units, resulting in better low-frequency performance and overall sound quality. At the same time, the pressure is evenly distributed between the head and the ear pads, so it is not easy to cause ear pressure pain during long-term wear. Therefore, they are widely used in indoor use scenarios such as home audio-visual entertainment, indoor office meetings, and indoor recording.

[0003] Traditional over-ear headphones have significant drawbacks in outdoor use, exhibiting poor adaptability to outdoor environments. Firstly, the full-coverage design blocks out most external sounds, making it difficult for wearers to identify surrounding noise sources such as vehicles and pedestrians, posing a safety hazard. Secondly, the earcups protrude outwards from the sides of the head, resulting in a larger overall windward surface area. When walking outdoors, oncoming airflow can easily interfere with the microphone, thus affecting outdoor voice interaction. Therefore, traditional over-ear headphones are ill-suited for outdoor voice interaction scenarios.

[0004] Therefore, there is an urgent need to design a headphone-style earmuff with its own sound pickup structure and audio processing method. Summary of the Invention

[0005] The purpose of this invention is to provide a headphone with a sound-receiving structure and an audio processing method, which solves the problem that existing traditional headphone is difficult to adapt to outdoor voice interaction scenarios.

[0006] To achieve this objective, the present invention adopts the following technical solution: A sound-receiving structure for use in a headphone, including a monitoring microphone and a Bluetooth microphone, wherein at least one of the earphone bodies has both a monitoring microphone and a Bluetooth microphone on its outer shell. In the Y direction, both the monitoring microphone and the Bluetooth microphone are located on the front side of the earcup shell; In the Z direction, the monitoring microphone and the Bluetooth microphone are located at the upper and lower parts of the earcup shell, respectively; The main axis of the monitoring microphone is parallel to the XY plane, and the main axis of the Bluetooth microphone is inclined downward relative to the XY plane and forward relative to the XZ plane. The X, Y, and Z directions are all perpendicular to each other.

[0007] Furthermore, the cross-sectional area of ​​the monitoring microphone perpendicular to its main receiving axis is greater than the cross-sectional area of ​​the Bluetooth microphone perpendicular to its main receiving axis.

[0008] Furthermore, the main shafts of both the monitoring microphone and the Bluetooth microphone are tilted to the side away from the wearer's head.

[0009] Furthermore, the angle α between the projection of the Bluetooth microphone's main axis in the XY plane and the Y direction is greater than the angle β between the projection of the monitoring microphone's main axis in the XY plane and the Y direction.

[0010] Furthermore, the angle α between the projection of the main axis of the Bluetooth microphone in the XY plane and the Y direction ranges from 25° to 35°, and the angle β between the projection of the main axis of the monitoring microphone in the XY plane and the Y direction ranges from 15° to 25°.

[0011] Furthermore, one of the earcups is equipped with both a monitoring microphone and a Bluetooth microphone, while the other earcup is equipped with a monitoring microphone. The monitoring microphones on the two earcups are symmetrically arranged.

[0012] Furthermore, a microphone sponge is provided on the earcup shell corresponding to the position of the monitoring microphone, and the microphone sponge is located on the outside of the monitoring microphone.

[0013] Furthermore, in the Z direction, the center of the monitoring microphone is above 1 / 2 of the height of the earcup shell, and the center of the Bluetooth microphone is below 1 / 3 of the height of the earcup shell.

[0014] Furthermore, the monitoring microphone cover is provided with a first silicone sleeve, and the Bluetooth microphone cover is provided with a second silicone sleeve, so as to install the monitoring microphone and the Bluetooth microphone in corresponding positions on the earcup shell.

[0015] A headband-style earmuff includes two earmuff bodies arranged opposite each other on both sides in the X direction, a headband connecting the two earmuff bodies, the two earmuff bodies being electrically connected, and the earmuff shell of at least one earmuff body being provided with the aforementioned sound-receiving structure. The earmuff body is equipped with a speaker facing the wearer's ear for outputting audio signals to the wearer.

[0016] An audio processing method for a headset, based on the headset, includes the following steps: Step S1, Audio Acquisition: Acquire ambient sound through a monitoring microphone located on the upper part of the earcup shell and output an environmental simulation signal; acquire the wearer's voice through a Bluetooth microphone located on the lower part of the earcup shell and output a human voice simulation signal. Step S2, Signal Preprocessing: Gain matching and filtering are performed on the environmental analog signal and the human voice analog signal respectively, and then analog-to-digital conversion is performed to obtain the environmental digital signal and the human voice digital signal; Step S3, Channel Processing: Equalize and correct the environmental digital signal to generate environmental monitoring audio; The human voice digital signal is used as the main input and the environmental digital signal is used as the noise reference for noise reduction processing to obtain the noise-reduced human voice digital signal. Step S4, Differentiated Output: Output the ambient monitoring audio to the speaker inside the earcup so that the wearer can hear the surrounding ambient sound; The noise-reduced digital human voice signal is transmitted to the terminal to enable voice calls.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The sound-receiving structure provided by this invention utilizes the coordinated arrangement of a monitoring microphone and a Bluetooth microphone on the front of the earcup shell, as well as their separate arrangement in the vertical space. This allows the monitoring microphone and Bluetooth microphone to respectively perform the functions of ambient sound acquisition and near-field voice pickup, simultaneously acquiring ambient sound signals and human voice signals under the same wearing condition. Specifically, the monitoring microphone collects ambient sound information from the space in front of and around the wearer. On the one hand, this allows the wearer to perceive external ambient sounds in real time, and on the other hand, it provides a reference noise input for noise reduction. The Bluetooth microphone, by tilting its main pickup axis downward relative to the XY plane and forward relative to the XZ plane, is positioned roughly towards the wearer's mouth area, increasing the proportion of direct components of the voice signal. It also helps to avoid direct wind blowing from the front to a certain extent, reducing outdoor wind noise and minimizing background noise during outdoor calls. This achieves synergistic optimization of voice enhancement and environmental perception, enabling the wearer to clearly output voice content and perceive changes in the external environment in real time during voice communication, thus improving the overall interactive experience and safety. The sound receiving structure described in this invention is suitable for outdoor voice interaction scenarios. It ensures the quality of voice calls or live broadcasts without losing environmental sound information, thus achieving a balance and optimization between voice communication quality and environmental perception capabilities.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0021] Figure 1 This is a three-dimensional schematic diagram of a headband-style earmuff according to an embodiment of the present invention; Figure 2 This is a schematic diagram of an explosion of a headband-style earmuff according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the earmuff body exploded according to an embodiment of the present invention; Figure 4 This is a three-dimensional schematic diagram of the earcup shell according to an embodiment of the present invention; Figure 5 This is an exploded schematic diagram of the earcup shell, monitoring microphone, and Bluetooth microphone according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a monitoring microphone and a Bluetooth microphone in an embodiment of the present invention. Figure 1 ,in Figure 6 The viewpoint is directly facing the XZ plane; Figure 7 This is a schematic diagram of a monitoring microphone and a Bluetooth microphone in an embodiment of the present invention. Figure 2 ,in Figure 7 The viewpoint is directly facing the XY plane; Figure 8 This is a flowchart illustrating the audio processing of an embodiment of the present invention.

[0022] Illustration: 1. Earcup body; 11. Earcup shell; 2. Headband; 3. Monitoring microphone; 31. Microphone foam; 32. First silicone sleeve; 4. Bluetooth microphone; 41. Second silicone sleeve; 5. Speaker; L1. Main shaft of the monitoring microphone; L2. Main shaft of the Bluetooth microphone. Detailed Implementation

[0023] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0024] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0025] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1: This embodiment provides a sound receiving structure, combined with Figures 1-3 As shown, this is used in a headset and is suitable for voice interaction scenarios in outdoor environments. In other words, this embodiment provides a sound-receiving structure for a headset. Combined with... Figures 4-7As shown, the sound receiving structure includes a monitoring microphone 3 and a Bluetooth microphone 4, and at least one earcup body 1 has both a monitoring microphone 3 and a Bluetooth microphone 4 on its earcup shell 11. In the Y direction, the earcup shell 11 has a front side and a rear side. The monitoring microphone 3 and Bluetooth microphone 4 are both located on the front side of the earcup shell 11, which allows for a centralized acoustic arrangement of the monitoring microphone 3 and Bluetooth microphone 4, unifying the front and rear sound receiving references. When the wearer wears the over-ear headphones, the monitoring microphone 3 and Bluetooth microphone 4 are located in front of the wearer's ears, placing both in the main direction of sound radiation from the wearer's face. For the Bluetooth microphone 4, it is more conducive to collecting the human voice signal propagating forward from the mouth and nose area during the wearer's speech. For the monitoring microphone 3, it is possible to simultaneously place the monitoring microphone 3 within the main sound propagation path range directly in front of the wearer's face, thereby collecting ambient sound while also taking into account the spatial sound field information directly in front of the wearer. On the one hand, this facilitates the wearer's safety perception of the external ambient sound in front of them; on the other hand, placing the monitoring microphone 3 and Bluetooth microphone 4 on the same side is beneficial to the accuracy of subsequent speech enhancement and noise reduction processing. In the Z-direction, the monitoring microphone 3 and Bluetooth microphone 4 are located at the upper and lower parts of the earcup shell 11, respectively. The Bluetooth microphone 4 is located at the lower part of the earcup shell 11 and close to the wearer's mouth area, significantly shortening the sound propagation path from the wearer's mouth to the Bluetooth microphone 4, improving near-field pickup gain and enhancing the concentration of human voice energy, effectively improving the speech signal-to-noise ratio. Simultaneously, the monitoring microphone 3 is positioned away from the wearer's mouth and nose area, reducing the probability of respiratory airflow noise, oral plosives, and direct speech interference entering the monitoring microphone 3, thereby improving the purity of ambient sound acquisition and the quality of the reference signal. The main pickup axis of the monitoring microphone 3 is parallel to the XY plane, maintaining a horizontal pickup posture, enabling the acquisition of ambient sounds from all directions. This achieves complete capture of sound sources from different directions, such as the front and sides, improving the ability to identify the location of ambient sounds and the integrity of spatial perception, enhancing the wearer's safety perception of external ambient sounds. Furthermore, this horizontal arrangement provides a more comprehensive and stable ambient sound reference signal for active noise cancellation, thereby improving the suppression effect of noise reduction processing. The main pickup axis of the Bluetooth microphone 4 is tilted downwards relative to the XY plane and forwards relative to the XZ plane. At this angle, the tilt direction of the Bluetooth microphone 4 is generally towards the wearer's mouth area, and its pickup direction is generally towards the wearer's mouth space area. This allows the Bluetooth microphone 4 to more accurately target the main vocal area, thereby prioritizing the capture of direct speech signals and increasing the proportion of speech energy in multi-source noise environments. Simultaneously, it reduces interference from ambient noise above and lateral reflections, improving voice call clarity and noise immunity. Furthermore, it can, to some extent, avoid direct headwinds, reducing outdoor wind noise and minimizing outdoor call noise. It should be noted that the main pickup axes of the monitoring microphone 3 and the Bluetooth microphone 4 are the main pickup direction axes of the monitoring microphone 3 and Bluetooth microphone 4, respectively, which are well-known to those skilled in the art and will not be elaborated upon here.The X, Y, and Z directions are perpendicular to each other. In a specific embodiment, a coordinate system is established based on the actual wearing and use of the headband earcups. The X direction is the left-right direction when actually wearing and using the headphones, the Y direction is the front-back direction when actually wearing and using the headphones, and the Z direction is the up-down direction when actually wearing and using the headphones.

[0027] In practical implementation, the coordinated arrangement of the monitoring microphone 3 and Bluetooth microphone 4 on the front side of the earcup shell 11 and their separate arrangement in the upper and lower spaces allow the monitoring microphone 3 and Bluetooth microphone 4 to respectively perform the functions of ambient sound acquisition and near-field voice pickup, acquiring ambient sound signals and human voice signals simultaneously under the same wearing condition. Among them, the monitoring microphone 3 collects ambient sound information from the space in front of and around the wearer. On the one hand, it allows the wearer to perceive the external ambient sound in real time, and on the other hand, it can provide a reference noise input for noise reduction. The Bluetooth microphone 4, by tilting its main pickup axis downward relative to the XY plane and forward relative to the XZ plane, is roughly facing the area of ​​the wearer's mouth space, increasing the proportion of direct components of the voice signal. At the same time, it can also avoid direct wind blowing to a certain extent, reducing outdoor wind noise and reducing outdoor call noise. This achieves synergistic optimization of voice enhancement and environmental perception, enabling the wearer to clearly output voice content and perceive changes in the external environment in real time when conducting voice communication, improving the overall interactive experience and safety.

[0028] The sound-receiving structure described in this embodiment is suitable for outdoor voice interaction scenarios, such as voice calls while walking outdoors or live streaming outdoors. In these scenarios, the wearer needs to clearly transmit their voice content to the communication partner or live streaming platform to avoid ambient noise masking the voice information or causing voice distortion, thereby ensuring the comprehensibility of the voice expression. On the other hand, the wearer needs to perceive the surrounding environmental sounds in real time to avoid safety hazards. The wearer can continuously perceive changes in vehicle, crowd, and other environmental sounds, thereby reacting to potential risks in a timely manner outdoors and maintaining a basic ability to judge the external environment. Furthermore, in situations where the wind speed is high or the airflow changes significantly outdoors, it is also necessary to minimize the impact of wind noise on voice and environmental sound acquisition to avoid low-frequency noise masking the effective voice signal and reducing the overall listening quality. The sound-receiving structure described in this embodiment provides ambient sound acquisition capabilities through the monitoring microphone 3, enabling the wearer to perceive changes in vehicle, crowd, and other ambient sounds in real time. At the same time, the near-field directional sound pickup capability of the Bluetooth microphone 4 enhances the clarity and anti-interference ability of the wearer's voice, thereby ensuring the quality of voice calls or live broadcasts without losing ambient sound information. This achieves a balance and optimization between voice communication quality and environmental perception capabilities, making it suitable for voice interaction scenarios in outdoor conditions and solving the problem that over-ear headphones are not suitable for outdoor occasions.

[0029] Combination Figures 5-7As shown, the cross-sectional area of ​​the monitoring microphone 3 perpendicular to its main receiving axis is larger than that of the Bluetooth microphone 4 perpendicular to its main receiving axis; at this time, the receiving end face area of ​​the monitoring microphone 3 is larger than that of the Bluetooth microphone 4. During operation, the monitoring microphone 3 has a larger effective sound-receiving area of ​​the diaphragm, thereby improving sound pressure conversion efficiency and sound energy capture capability, enhancing the overall sensitivity and dynamic range of ambient sound pickup, enabling the monitoring microphone 3 to cover a wider frequency band of ambient sound information and improve the ability to reproduce sound details, thus achieving effective capture of distant, low-intensity ambient sounds, while expanding the spatial coverage of ambient sound acquisition and improving the overall perception integrity of multi-directional sound sources. In contrast, the Bluetooth microphone 4 uses a smaller cross-sectional area and a smaller diaphragm structure, making it more suitable for close-range voice pickup scenarios. While ensuring speech clarity, it reduces redundant acquisition of wideband ambient sound information. The miniaturized diaphragm structure can improve the directivity concentration, making the receiving beam narrower, thereby reducing interference from lateral and rearward ambient sounds, while also reducing the airflow area and reducing low-frequency wind noise interference caused by breathing and oral airflow.

[0030] Generally, when it's necessary to improve a microphone's sound pickup capability, it's common to think of increasing the cross-sectional area of ​​the microphone perpendicular to its main pickup axis to enhance its sound reception. Especially for over-ear headphones, since the Bluetooth microphone 4 is mounted on the earcup shell 11, there's still a certain distance between the Bluetooth microphone 4 and the wearer's mouth. To ensure the voice pickup effect of the Bluetooth microphone 4, technicians might tend to increase the cross-sectional area of ​​the Bluetooth microphone 4, thereby improving its sensitivity to the wearer's voice. However, this embodiment does not follow this intuitive approach. Instead, it makes the cross-sectional area of ​​the monitoring microphone 3 perpendicular to its main pickup axis larger than the cross-sectional area of ​​the Bluetooth microphone 4 perpendicular to its main pickup axis, effectively reducing the receiving end area of ​​the Bluetooth microphone 4. In this embodiment, the Bluetooth microphone 4 is not simply reduced in size, but rather coordinated with the positional relationship of the monitoring microphone 3 and Bluetooth microphone 4: the monitoring microphone 3 is located on the upper part of the earcup shell 11, away from the wearer's mouth and nose area, and the main axis of the monitoring microphone 3 is parallel to the XY plane. The monitoring microphone 3 has a lower probability of being directly impacted by breathing airflow, oral plosives, and near-field speech. Therefore, the monitoring microphone 3 can adopt a larger cross-sectional area to enhance the ambient sound acquisition capability and improve the quality of the ambient sound reference signal. The Bluetooth microphone 4 is located on the lower part of the earcup shell 11, and the main axis of the Bluetooth microphone 4 is tilted downward relative to the XY plane and forward relative to the XZ plane. At this time, the tilt direction of the Bluetooth microphone 4 is generally towards the wearer's mouth area. The propagation path of the wearer's voice to the Bluetooth microphone 4 is shorter, and the direct component of human voice is stronger. Therefore, the Bluetooth microphone 4 does not need to rely on a large cross-sectional area to compensate for insufficient sound pickup. On the contrary, the Bluetooth microphone 4 adopts a smaller cross-sectional area, which can reduce the effective area of ​​the Bluetooth microphone 4's receiving end face affected by environmental noise, breathing airflow, oral plosives, and outdoor wind, thereby reducing low-frequency airflow noise and wind noise interference.

[0031] Combination Figures 6-7 As shown, the main pickup axis of both the monitoring microphone 3 and the Bluetooth microphone 4 is tilted away from the wearer's head. Specifically, for the monitoring microphone 3, this tilts its pickup direction away from the wearer's head area, reducing the influence of the head and face on ambient sound acquisition and making the ambient sound field information closer to the actual propagation state. For the Bluetooth microphone 4, its pickup axis is positioned away from the area directly in front of the wearer's head and face, thus avoiding direct impact of the airflow exhaled from the wearer's mouth and nose on the diaphragm of the Bluetooth microphone 4. This significantly reduces the probability of low-frequency airflow noise such as "pops" and "breathing noise," and also reduces the direct impact of oncoming wind on the Bluetooth microphone 4 when used outdoors, further reducing wind noise interference and improving the stability and clarity of voice calls. Figure 7As shown, the angle α between the projection of the main axis of the Bluetooth microphone 4 in the XY plane and the Y direction is greater than the angle β between the projection of the main axis of the microphone 3 in the XY plane and the Y direction. For the Bluetooth microphone 4, a larger outer deflection angle has two types of noise reduction advantages: First, it can avoid interference from the forward airflow exhaled from the mouth and nose. The airflow of human speech is ejected forward along the Y-axis. If the Bluetooth microphone 4 has a smaller deflection angle and is closer to the face, the turbulence formed by the diffusion of the mouth and nose will continue to wash over the sound-receiving end face. Increasing the outer deflection angle can get away from the main airflow diffusion area, significantly reducing the noise of speaking and reading. The Bluetooth microphone 4 reduces the impact of oncoming airflow by shifting outwards to avoid the path of the wind, significantly reducing the direct impact of the airflow on the microphone and effectively reducing wind noise interference in outdoor call scenarios. For the monitoring microphone 3, setting a smaller offset angle is a core function to match its environmental sound pickup, facilitating the complete acquisition of ambient sounds such as traffic and pedestrians directly in front of the user. The microphone's main axis is closer to the front in the Y direction, resulting in higher noise sampling information completeness and providing a reliable reference signal for environmental sound perception and noise reduction, leading to more stable processing. In a specific embodiment, the angle α between the projection of the Bluetooth microphone 4's main axis in the XY plane and the Y direction ranges from 25° to 35°, while the angle β between the projection of the monitoring microphone 3's main axis in the XY plane and the Y direction ranges from 15° to 25°, with angle α always greater than angle β. Setting the angle α within the range of 25° to 35° allows the Bluetooth microphone 4's receiving end face to be sufficiently offset from the airflow diffusion area directly in front of the user's mouth and nose, while reducing the direct impact of outdoor oncoming airflow on the Bluetooth microphone 4. When the angle α is less than 25°, the Bluetooth microphone 4 is still easily interfered with by the exhaled airflow from the mouth and nose and the frontal airflow. When the angle α is greater than 35°, the Bluetooth microphone 4 deviates too much from the user's speaking direction, which may lead to a decrease in the effective voice signal reception strength. Setting the angle β within the range of 15° to 25° allows the monitoring microphone 3's main receiving axis to remain close to the Y-axis directly in front, obtaining a more complete ambient sound signal. When the angle β is less than 15°, the monitoring microphone 3 easily receives the user's speaking airflow and the frontal airflow. When the angle β is greater than 25°, the monitoring microphone 3's ambient sound pickup range and frontal sound acquisition capability will be affected. Furthermore, the projection angle α of the main axis of the Bluetooth microphone 4 in the XY plane relative to the Y direction is 28°, and the projection angle β of the main axis of the monitoring microphone 3 in the XY plane relative to the Y direction is 22°. While ensuring that the Bluetooth microphone 4 has good airflow resistance and wind noise resistance, the monitoring microphone 3 can stably collect ambient sound directly in front of the user, providing an effective reference signal for subsequent ambient sound perception and noise reduction processing.In the Z direction, the center of the monitoring microphone 3 is higher than half the height of the earcup shell 11, and the center of the Bluetooth microphone 4 is lower than one-third the height of the earcup shell 11. For the monitoring microphone 3, its placement in the upper half of the earcup shell 11 keeps it away from the mouth, nose, and jaw movement areas, avoiding skin friction noise from chewing and speaking, as well as interference from airflow from the mouth and nose. Combined with a smaller horizontal deflection angle, it can better collect ambient sound from the front, ensuring the integrity of ambient sound sampling. For the Bluetooth microphone 4, its placement in the lower one-third of the earcup shell 11 shortens the vertical distance from the human sound source, offsetting the lateral sound path loss caused by its large outward deflection angle on the horizontal plane. At the same time, the low position of the earcup shell 11 matches the downward tilted main axis of the Bluetooth microphone 4, receiving the human voice diffused downward from the jaw, increasing the incident sound pressure of the human voice. Combined with the large outward deflection angle to avoid frontal wind, it significantly reduces background noise and effectively improves the signal-to-noise ratio of human voice during outdoor calls.

[0032] When a monitoring microphone 3 and a Bluetooth microphone 4 are installed on the earcup body 1, one earcup body 1 has both a monitoring microphone 3 and a Bluetooth microphone 4 installed simultaneously, while the other earcup body 1 has only a monitoring microphone 3 installed. The two monitoring microphones 3 are used for bilateral ambient sound acquisition, allowing the wearer to better perceive ambient sound and avoiding the loss of ambient sound field information caused by single-sided sound acquisition, thus widening the ambient sound acquisition coverage. The Bluetooth microphone 4 is used to acquire the wearer's voice; even with only one microphone, there is no problem of insufficient voice acquisition range or missing voice location. A single Bluetooth microphone 4 can completely capture the voice, eliminating the need for a pair of Bluetooth microphones on both sides. The symmetrical arrangement of the monitoring microphones 3 on the two earcup bodies 1 allows for the even acquisition of external ambient sound sources from the wearer's left and right sides. In a specific embodiment, when the wearer wears over-ear headphones, the earcup body 1 located on the left side of the wearer's head has both a monitoring microphone 3 and a Bluetooth microphone 4 installed simultaneously, while the earcup body 1 located on the right side of the wearer's head has only a monitoring microphone 3 installed.

[0033] The earcup shell 11 is provided with a microphone sponge 31 at the position corresponding to the monitoring microphone 3, and the microphone sponge 31 is located on the outside of the monitoring microphone 3. On the one hand, the microphone sponge 31 can buffer the outdoor oncoming airflow and reduce the broadband wind noise generated by the airflow directly impacting the monitoring microphone 3. On the other hand, the porous structure of the sponge can attenuate sharp high-frequency noises such as vehicle horns, making the external ambient sound more mellow and weakening the interference of harsh ambient sound on voice dialogue. The Bluetooth microphone 4 is used to collect the wearer's voice, and no microphone sponge 31 is provided at the position directly opposite the Bluetooth microphone 4 to avoid loss of sound energy in voice pickup. The monitoring microphone 3 is covered with a first silicone sleeve 32, and the Bluetooth microphone 4 is covered with a second silicone sleeve 41, so as to install the monitoring microphone 3 and the Bluetooth microphone 4 at corresponding positions on the earcup shell 11. The first silicone sleeve 32 and the second silicone sleeve 41 respectively provide independent positioning and fixation for the monitoring microphone 3 and the Bluetooth microphone 4, and at the same time seal the gap between the monitoring microphone 3 and the Bluetooth microphone 4 and the opening of the earcup shell 11, preventing noise from the internal cavity of the earcup shell 11 from entering the sound pickup path, and also buffering the mechanical noise caused by the vibration of the earcup shell 11 transmitted to the monitoring microphone 3 and the Bluetooth microphone 4 during wearing and movement.

[0034] The sound-receiving structure provided in this embodiment, through the coordinated arrangement of the monitoring microphone 3 and the Bluetooth microphone 4 on the front side of the earcup shell 11 and their separate arrangement in the upper and lower spaces, enables the monitoring microphone 3 and the Bluetooth microphone 4 to respectively undertake the functions of ambient sound acquisition and near-field voice pickup, simultaneously acquiring ambient sound signals and human voice signals in the same wearing state. Among them, the monitoring microphone 3 collects ambient sound information from the space in front of and around the wearer, which on the one hand makes it easier for the wearer to perceive the external ambient sound in real time, and on the other hand provides a reference noise input for noise reduction. The Bluetooth microphone 4, by tilting its main shaft downward relative to the XY plane and forward relative to the XZ plane, is roughly facing the wearer's mouth space area, increasing the proportion of direct component of the voice signal, while also avoiding direct wind blowing to a certain extent, reducing outdoor wind noise, and reducing outdoor call noise. This achieves synergistic optimization of voice enhancement and environmental perception, enabling the wearer to clearly output voice content and perceive changes in the external environment in real time when conducting voice communication, improving the overall interactive experience and safety. The sound receiving structure described in this embodiment is suitable for outdoor voice interaction scenarios. It ensures the quality of voice calls or live broadcasts without losing environmental sound information, thus achieving a balance and optimization between voice communication quality and environmental perception capabilities.

[0035] Example 2: This embodiment provides a headset suitable for outdoor voice interaction scenarios. Combined with... Figures 1-3As shown, the headband includes two earmuff bodies 1 arranged opposite each other on both sides in the X direction, and a headband 2 connecting the two earmuff bodies 1. The two earmuff bodies 1 are electrically connected. In a specific embodiment, the earmuff bodies 1 and the headband 2 are rotatably connected, and the angle of the earmuff bodies 1 can be adjusted to adapt to different wearers' head shapes, improving the fit. An earmuff shell 11 is provided on the side of the earmuff body 1 away from the other earmuff body 1, that is, an earmuff shell 11 is provided on the side of the earmuff body 1 away from the wearer's head. At least one earmuff body 1 has a sound receiving structure as described in Embodiment 1 on its earmuff shell 11. A speaker 5 facing the wearer's ear is provided inside the earmuff body 1 for outputting audio signals to the wearer.

[0036] It should be noted that the headset described in this embodiment also includes conventional supporting structures such as batteries and internal circuits. These structures are common basic components of headsets and are known to those skilled in the art, and will not be elaborated on here. The key feature of the headset described in this embodiment is the integration of the sound receiving structure described in Embodiment 1. This allows for clear output of voice content and real-time perception of changes in the external environment during outdoor voice communication, improving the overall interactive experience and safety. Consequently, the headset described in this embodiment is suitable for outdoor voice interaction scenarios.

[0037] Example 3: This embodiment provides an audio processing method for a headset, used to simultaneously achieve ambient sound monitoring and human voice noise reduction for calls, combined with... Figure 8 As shown. The audio processing method for the over-ear headphones described in this embodiment, based on the over-ear headphones described in Embodiment 2, includes the following steps: Step S1, Audio Acquisition: The external ambient sound is acquired through the monitoring microphone 3 located on the upper part of the earcup shell 11 and the ambient simulated signal is output. The wearer's voice is acquired through the Bluetooth microphone 4 located on the lower part of the earcup shell 11 and the human voice simulated signal is output. Step S2, Signal Preprocessing: Gain matching and filtering are performed on the environmental analog signal and the human voice analog signal respectively, and then analog-to-digital conversion is performed to obtain the environmental digital signal and the human voice digital signal; Step S3, Channel Processing: Equalize and correct the environmental digital signal to generate environmental monitoring audio; The human voice digital signal is used as the main input and the environmental digital signal is used as the noise reference for noise reduction processing to obtain the noise-reduced human voice digital signal. Step S4, Differentiated Output: Output the ambient monitoring audio to the speaker 5 inside the earcup body 1 so that the wearer can hear the surrounding ambient sound; The noise-reduced digital human voice signal is transmitted to the terminal to enable voice calls.

[0038] It should be noted that the specific algorithm and processing flow for noise reduction based on environmental digital signals and human voice digital signals in this embodiment are well known to those skilled in the art and will not be elaborated here. The key point of this embodiment is to use the external environmental sound collected by the monitoring microphone 3 to achieve a dual function. First, it generates environmental monitoring audio and sends it to the speaker 5, allowing the wearer to listen to the surrounding environmental sound in real time. Second, it serves as a noise reference signal to participate in the human voice noise reduction operation, reducing the environmental noise mixed in the human voice signal.

[0039] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A radio receiver structure, characterized in that: Used in over-ear headphones, including a monitoring microphone (3) and a Bluetooth microphone (4), and at least one of the headphone bodies (1) has a headphone shell (11) on which both a monitoring microphone (3) and a Bluetooth microphone (4) are provided. In the Y direction, the monitoring microphone (3) and the Bluetooth microphone (4) are both located on the front side of the earcup shell (11); In the Z direction, the monitoring microphone (3) and the Bluetooth microphone (4) are located at the upper and lower parts of the earcup shell (11), respectively; The main axis of the microphone (3) is parallel to the XY plane, and the main axis of the Bluetooth microphone (4) is inclined downward relative to the XY plane and forward relative to the XZ plane. The X, Y, and Z directions are all perpendicular to each other.

2. The radio receiving structure according to claim 1, characterized in that: The cross-sectional area of ​​the monitoring microphone (3) perpendicular to its main axis is greater than that of the Bluetooth microphone (4) perpendicular to its main axis.

3. The radio receiver structure according to claim 1, characterized in that: The main shafts of the monitoring microphone (3) and the Bluetooth microphone (4) are both tilted to the side away from the wearer's head.

4. The radio receiving structure according to claim 3, characterized in that: The angle α between the projection of the main axis of the Bluetooth microphone (4) in the XY plane and the Y direction is greater than the angle β between the projection of the main axis of the microphone (3) in the XY plane and the Y direction.

5. The radio receiver structure according to claim 4, characterized in that: The angle α between the projection of the main axis of the Bluetooth microphone (4) in the XY plane and the Y direction is in the range of 25°~35°, and the angle β between the projection of the main axis of the microphone (3) in the XY plane and the Y direction is in the range of 15°~25°.

6. The radio receiver structure according to claim 1, characterized in that: One of the earcups (1) is equipped with both a monitoring microphone (3) and a Bluetooth microphone (4), and the other earcup (1) is equipped with a monitoring microphone (3). The monitoring microphones (3) on the two earcups (1) are symmetrically arranged.

7. The radio receiver structure according to claim 1, characterized in that: The earcup shell (11) is provided with a microphone sponge (31) at the position corresponding to the monitoring microphone (3), and the microphone sponge (31) is located outside the monitoring microphone (3).

8. The radio receiving structure according to claim 1, characterized in that: In the Z direction, the center of the listening microphone (3) is higher than 1 / 2 of the height of the earcup shell (11), and the center of the Bluetooth microphone (4) is lower than 1 / 3 of the height of the earcup shell (11).

9. The radio receiver structure according to claim 1, characterized in that: The monitoring microphone (3) is covered with a first silicone sleeve (32), and the Bluetooth microphone (4) is covered with a second silicone sleeve (41) to install the monitoring microphone (3) and the Bluetooth microphone (4) at corresponding positions on the earcup shell (11).

10. A type of headband-style earmuff, characterized in that: Includes two earmuff bodies (1) arranged opposite each other on both sides in the X direction, a headband (2) connecting the two earmuff bodies (1), the two earmuff bodies (1) being electrically connected, and the earmuff shell (11) of at least one earmuff body (1) being provided with the sound receiving structure as described in any one of claims 1-9; The earmuff body (1) is equipped with a speaker (5) facing the wearer's ear, which is used to output audio signals to the wearer.

11. An audio processing method for a headset, characterized in that: Based on the headband earmuff of claim 10, the following steps are included: Step S1, Audio Acquisition: The ambient sound is acquired by the monitoring microphone (3) located on the upper part of the earcup shell (11) and the ambient simulated signal is output. The wearer's voice is acquired by the Bluetooth microphone (4) located on the lower part of the earcup shell (11) and the human voice simulated signal is output. Step S2, Signal Preprocessing: Gain matching and filtering are performed on the environmental analog signal and the human voice analog signal respectively, and then analog-to-digital conversion is performed to obtain the environmental digital signal and the human voice digital signal; Step S3, Channel Processing: Equalize and correct the environmental digital signal to generate environmental monitoring audio; The human voice digital signal is used as the main input and the environmental digital signal is used as the noise reference for noise reduction processing to obtain the noise-reduced human voice digital signal. Step S4, Differentiated output: Output the ambient monitoring audio to the speaker (5) inside the earcup body (1) so that the wearer can hear the surrounding ambient sound; The noise-reduced digital human voice signal is transmitted to the terminal to enable voice calls.

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