True wireless Bluetooth earphone

Abstract

The embodiment of the utility model provides a true wireless Bluetooth earphone, and belongs to the technical field of earphones. The true wireless Bluetooth earphone comprises an earphone main body, an ear hook and a battery compartment, wherein the earphone main body comprises a shell, a first microphone, a second microphone, a third microphone and a main circuit board; the main circuit board is provided with a first microphone, a second microphone, a third microphone and a control module; the first acquisition frequency of the first microphone is greater than or equal to a limiting frequency threshold value, and the first microphone is used for acquiring a first voice signal; the second acquisition frequency of the second microphone is greater than or equal to the limiting frequency threshold, and the second microphone is used for acquiring a second voice signal; the third acquisition frequency of the third microphone is smaller than the limiting frequency threshold value, and the third microphone is used for acquiring a third voice signal; and the control module is configured to perform noise reduction processing and echo cancellation on the first voice signal, the second voice signal and the third voice signal to obtain a target signal. The embodiment of the utility model can improve the call quality.

Description

Technical Field

[0001] This application relates to the technical field of earphones, and in particular to a truly wireless Bluetooth earphone. Background Art

[0002] During a call using an earphone, the user may be in a noisy environment, and the earphone itself may also have background noise and echo. Traditional wireless earphones use two microphones to capture sound and eliminate environmental noise and echo in the sound. However, the current wireless earphones have poor noise reduction effect and are difficult to use in a noisy environment, which affects the user's call experience.

[0003] Therefore, how to improve the sound clarity of wireless earphones, improve call quality and provide a clearer call experience has become a technical problem to be solved urgently. Utility Model Content

[0004] The main purpose of the embodiments of this application is to propose a truly wireless Bluetooth earphone, aiming to improve the call quality of wireless earphones and provide a clearer call experience.

[0005] To achieve the above object, a first aspect of the embodiments of this application proposes a truly wireless Bluetooth earphone, which includes: an earphone main body, an ear hook and a battery compartment. The earphone main body includes a housing, a first microphone, a second microphone, a third microphone and a main circuit board;

[0006] The main circuit board, the first microphone, the second microphone and the third microphone are located inside the housing; the main circuit board includes a control module, and the control module is connected to the first microphone, the second microphone and the third microphone. The third microphone is a bone conduction microphone;

[0007] The first acquisition frequency of the first microphone is greater than or equal to a limit frequency threshold, and the first microphone is used to acquire a first voice signal; wherein, the limit frequency threshold is the lowest acquisition frequency of the first microphone;

[0008] The second acquisition frequency of the second microphone is greater than or equal to the limit frequency threshold, and the second microphone is used to acquire a second voice signal;

[0009] The third acquisition frequency of the third microphone is less than the limit frequency threshold, and the third microphone is used to acquire a third voice signal;

[0010] The control module is configured to: perform noise reduction processing and echo cancellation on the first voice signal, the second voice signal and the third voice signal to obtain a target signal.

[0011] In some embodiments, the housing includes an upper earphone housing and a lower earphone housing. The lower earphone housing is the side of the housing close to the ear, and the upper earphone housing is the side of the housing away from the ear. The third microphone is attached to the sound collection area of the lower earphone housing, and the sound collection area is the area where the lower earphone housing contacts the ear.

[0012] The control module is further configured to: in response to the target frequency value of the target signal being greater than or equal to a preset state switching frequency threshold, switch the third microphone from the on state to the off state.

[0013] In some embodiments, the main circuit board is further provided with a signal-to-noise ratio detector.

[0014] The signal-to-noise ratio detector is connected to the control module. The control module is further configured to: filter the target signal and analyze to obtain a target noise value. The signal-to-noise ratio detector is configured to: compare the target noise value with a preset noise threshold. The control module, in response to the target noise value being greater than or equal to the noise threshold, switches the third microphone from the on state to the off state.

[0015] In some embodiments, the earphone body further includes a speaker, a first microphone sleeve, and a second microphone sleeve. The lower earphone housing is provided with a sound outlet hole and a phase inversion hole, and a tuning net is arranged in the phase inversion hole.

[0016] The speaker is connected to the main circuit board. The first microphone sleeve is sleeved on the first microphone, and the second microphone sleeve is sleeved on the second microphone.

[0017] The speaker is configured to receive the electrical signal output by the control module and convert the electrical signal into a sound signal. The tuning net is configured to control the air permeability to adjust the sound signal output by the speaker.

[0018] In some embodiments, the earphone body further includes a rear cavity housing and a double-sided adhesive layer.

[0019] The double-sided adhesive layer adhesively connects the main circuit board and the rear cavity housing, and the rear cavity housing is connected to the speaker.

[0020] In some embodiments, the upper earphone housing is provided with a first sound guiding hole and a second sound guiding hole. The first sound guiding hole is located at one end of the upper earphone housing close to the user's mouth, and the second sound guiding hole is located at one end of the upper earphone housing away from the user's mouth.

[0021] The first microphone has a first sound pickup hole, and the second microphone has a second sound pickup hole. The first sound pickup hole corresponds to the first sound guiding hole, and the second sound pickup hole corresponds to the second sound guiding hole.

[0022] In some embodiments, the earphone body further includes a first waterproof net and a second waterproof net;

[0023] The first waterproof net is disposed between the upper earphone shell and the first microphone, and the second waterproof net is disposed between the upper earphone shell and the second microphone.

[0024] In some embodiments, the ear hook includes a rotating shaft;

[0025] The ear hook is rotatably connected to the earphone body through the rotating shaft; the rotating shaft is used to adjust the rotation angle between the ear hook and the earphone body so that the earphone body fits the user's ear.

[0026] In some embodiments, the earphone body further includes a flexible circuit board;

[0027] The third microphone is disposed on the flexible circuit board, and the flexible circuit board is connected to the main circuit board;

[0028] The flexible circuit board is used to output the third voice signal collected by the third microphone to the control module on the main circuit board.

[0029] In some embodiments, both the first microphone and the second microphone are silicon microphones; the first microphone and the second microphone are respectively mounted on the main circuit board.

[0030] The truly wireless Bluetooth earphone provided by the present application captures sound by using multiple microphones, where the first microphone captures a first voice signal, the second microphone captures a second voice signal, and the third microphone captures a third voice signal; the third microphone is a bone conduction microphone, and the acquisition frequency of the bone conduction microphone is different from that of the first microphone or the second microphone, which expands the frequency range of the captured sound; and, the control module performs noise reduction processing and echo cancellation on the first voice signal, the second voice signal, and the third voice signal to obtain a target signal, thereby improving the sound clarity of the truly wireless Bluetooth earphone, improving the call quality, and providing a clear and interference-free call experience. The embodiments of the present application can reduce the interference of environmental noise and earphone background noise and are applicable to environments with relatively high noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a block diagram of a truly wireless Bluetooth earphone provided by an embodiment of the present application;

[0032] Figure 2 is a schematic structural diagram of a truly wireless Bluetooth earphone provided by an embodiment of the present application;

[0033] Figure 3 is a schematic structural diagram of a truly wireless Bluetooth earphone provided by another embodiment of the present application;

[0034] Figure 4 It is a schematic diagram of the state of a true wireless Bluetooth headset, which is an application example provided by an embodiment of the present application;

[0035] Figure 5 It is an exploded view of a true wireless Bluetooth headset provided by an embodiment of the present application;

[0036] Figure 6 It is a schematic structural diagram of a true wireless Bluetooth headset provided by another embodiment of the present application;

[0037] Reference numerals: 100 headset body; 110 first microphone; 111 first waterproof net; 120 second microphone; 121 second waterproof net; 130 third microphone; 140 main circuit board; 141 control module; 150 headset upper shell; 151 first sound guide hole; 152 second sound guide hole; 160 headset lower shell; 161 sound outlet hole; 162 phase inversion hole; 170 speaker; 180 rear cavity housing; 190 double-sided adhesive layer; 200 earhook; 210 rotating shaft; 300 battery compartment. Detailed implementation manners

[0038] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] It should be noted that although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order from the module division in the device or the order in the flowchart. Terms such as "first" and "second" in the specification, claims and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0041] First, several terms involved in the present application are analyzed:

[0042] True wireless Bluetooth headset: A true wireless (True Wireless Stereo, abbreviated as TWS) headset refers to a headset without a traditional connection line, including Bluetooth headsets, infrared headsets, etc. A true wireless Bluetooth headset is a Bluetooth headset without a connection line.

[0043] The CVC (Clear Voice Capture) noise reduction algorithm is a noise reduction technology for call software that can reduce echo and ambient noise during a call, thus providing a clearer call experience. The CVC noise reduction algorithm enables the other party on the call to hear the voice more clearly.

[0044] MEMS (Micro-Electro-Mechanical System), refers to high-tech devices with dimensions in millimeters or even smaller, and is an independent intelligent system.

[0045] The MEMS microphone, also known as the silicon microphone (abbreviated as silicon mic), is a microphone manufactured based on MEMS technology.

[0046] The ECM microphone refers to the electret capacitance microphone (abbreviated as ECM).

[0047] Bone conduction microphone: The bone conduction microphone is used to collect sounds transmitted through bones. Common microphones collect sounds transmitted through the air, while the bone conduction microphone collects sounds transmitted through bones, such as voices transmitted through the skull.

[0048] The true wireless Bluetooth headset provided by the embodiments of this application will be specifically described through the following embodiments. First, the true wireless Bluetooth headset in the embodiments of this application will be described.

[0049] It should be noted that in each specific implementation manner of this application, when it comes to performing relevant processing based on data related to the user's identity or characteristics, such as user voice information and user call data, the user's permission or consent will be obtained first. Moreover, the collection, use, and processing of these data will comply with relevant laws, regulations, and standards. In addition, when the embodiments of this application need to obtain the user's sensitive personal information, the user's separate permission or separate consent will be obtained. After clearly obtaining the user's separate permission or separate consent, the necessary user-related data for the normal operation of the embodiments of this application will be obtained.

[0050] Figure 1 It is an optional module block diagram of the true wireless Bluetooth headset provided by the embodiments of this application. The true wireless Bluetooth headset includes: a headset body 100, an earhook 200, and a battery compartment 300. The headset body 100 includes a housing (not shown in the figure), a first microphone 110, a second microphone 120, a third microphone 130, and a main circuit board 140;

[0051] The main circuit board 140, the first microphone 110, the second microphone 120, and the third microphone 130 are located inside the housing; the main circuit board 140 includes a control module 141, and the control module 141 is connected to the first microphone 110, the second microphone 120, and the third microphone 130. The third microphone 130 is a bone conduction microphone.

[0052] The first acquisition frequency of the first microphone 110 is greater than or equal to the limit frequency threshold, and the first microphone 110 is used to acquire the first voice signal; wherein, the limit frequency threshold is the lowest acquisition frequency of the first microphone 110; the second acquisition frequency of the second microphone 120 is greater than or equal to the limit frequency threshold, and the second microphone 120 is used to acquire the second voice signal; the third acquisition frequency of the third microphone 130 is less than the limit frequency threshold, and the third microphone 130 is used to acquire the third voice signal; the control module 141 is configured to: perform noise reduction processing and echo cancellation on the first voice signal, the second voice signal, and the third voice signal to obtain a target signal.

[0053] The beneficial effects of the embodiments of the present application include but are not limited to: the first voice signal is acquired by the first microphone 110, the second voice signal is acquired by the second microphone 120, and the third voice signal is acquired by the third microphone 130, and multiple microphones are used to capture sounds together; wherein the third microphone 130 is a bone conduction microphone, and the acquisition frequency of the bone conduction microphone is different from that of the first microphone 110 or the second microphone 120, expanding the frequency range of the acquired sounds; and, the control module 141 performs noise reduction processing and echo cancellation on the first voice signal, the second voice signal, and the third voice signal to obtain a target signal, thereby improving the sound clarity of the true wireless Bluetooth headset, improving the call quality, and providing a clear and interference-free call experience. The embodiments of the present application can reduce the interference of environmental noise and headphone background noise and are applicable to environments with relatively high noise.

[0054] Specifically, the first microphone 110 or the second microphone 120 may be a MEMS microphone (also called a silicon microphone) or an ECM microphone. The third microphone 130 may be a bone conduction accelerometer, a bone voiceprint sensor, or a gyroscope. The MEMS microphone or the ECM microphone has a small volume, which can reduce the volume of the true wireless Bluetooth headset and improve the portability of the product.

[0055] It should be noted that the first voice signal is the voice signal collected by the first microphone 110, the second voice signal is the voice signal collected by the second microphone 120, and the third voice signal is the voice signal collected by the third microphone 130. Among them, the sounds collected by the first microphone 110 and the second microphone 120 are both sounds transmitted through air conduction, and the sound collected by the third microphone 130 is the sound transmitted through bone conduction. In the case of relatively high ambient noise (such as wind noise), the sound transmitted through air conduction is easily interfered by noise, while the sound transmitted through bone conduction is not easily affected by the external environment. Therefore, the third microphone 130, as a bone conduction microphone, can suppress the influence of external environmental noise, greatly attenuate the noise or echo transmitted through air conduction, thereby improving the noise reduction ability of the product.

[0056] In some embodiments, the control module 141 may further be configured to: input the first voice signal and the second voice signal into a CVC noise reduction algorithm for noise reduction processing to obtain a first processed signal; perform single microphone noise reduction processing on the third voice signal to obtain a second processed signal; perform echo cancellation and signal mixing on the first processed signal and the second processed signal to obtain a target signal.

[0057] It should be noted that the third microphone 130 mainly collects bone conduction voice signals below the limit frequency threshold, and its bone conduction characteristics can suppress the ambient noise and echo transmitted through air conduction below the limit frequency threshold. The noise and echo at and above the limit frequency threshold can be suppressed by the CVC noise reduction algorithm. Therefore, the embodiments of the present application perform noise reduction processing on noises in different frequency ranges respectively, improving the sound clarity of the true wireless Bluetooth headset, improving the call quality, and providing a clear and interference-free call experience.

[0058] Specifically, the limit frequency threshold may be 1000 Hz. For example, the first collection frequency and the second collection frequency are greater than or equal to 1000 Hz, and the third collection frequency is less than 1000 Hz.

[0059] In some embodiments, the frequency of the first voice signal is the first collection frequency, the frequency of the second voice signal is the second collection frequency, and the frequency of the third voice signal is the third collection frequency.

[0060] Specifically, the resonance peak value of the first voice signal or the second voice signal may be any value (including the two end values) within the range of 4 kHz - 5 kHz. The resonance peak refers to the region where the energy is relatively concentrated in the sound spectrum.

[0061] Please refer to Figure 1 、 Figure 2 and Figure 3, in some embodiments, the housing includes an upper earphone housing 150 and a lower earphone housing 160. The lower earphone housing 160 is the side of the housing close to the ear, and the upper earphone housing 150 is the side of the housing away from the ear; the third microphone 130 is attached to the sound collection area of the lower earphone housing 160, and the sound collection area is the area where the lower earphone housing 160 contacts the ear. The control module 141 is further configured to: in response to the target frequency value of the target signal being greater than or equal to a preset state switching frequency threshold, switch the third microphone 130 from the on state to the off state.

[0062] The advantage of this embodiment is that the third microphone 130 is attached to the lower earphone housing 160 to be close to the user's ear, thereby improving the quality of the third voice signal collected by the third microphone 130; and, by comparing the target frequency value with the preset state switching frequency threshold and controlling the state of the third microphone 130 according to the comparison result, the noise reduction method of the truly wireless Bluetooth earphone can be flexibly adjusted.

[0063] It should be noted that Figure 3 the area A outlined by the dashed line in

[0064] Please refer to Figure 2 and Figure 4 , in an application example, the state of the truly wireless Bluetooth earphone worn by the user is as Figure 4 shown. It should be noted that the third microphone 130 is closely attached to the sound collection area of the lower earphone housing 160 (the area A in Figure 3 can be referred to), and the external contact surface of the lower earphone housing 160 corresponding to the sound collection area contacts the user's preauricular bone. The third microphone 130 picks up the user's voice by capturing the sound vibration transmitted from the preauricular bone.

[0065] In one embodiment, the first microphone 110, the second microphone 120, and the user's mouth are on a straight line. The distance between the first microphone 110 and the second microphone 120 is a preset distance value. Specifically, the value range of this distance is 5 - 30 mm (millimeters). For example, the distance between the first microphone 110 and the second microphone 120 can be 10 mm.

[0066] It should be noted that the third microphone 130 is located on the side of the main circuit board 140 close to the lower earphone housing 160, and the first microphone 110 and the second microphone 120 are located on the side of the main circuit board 140 close to the upper earphone housing 150. For example, both the first microphone 110 and the second microphone 120 are attached to the main circuit board 140, and the third microphone 130 is connected to the main circuit board 140 through a flexible circuit board.

[0067] It should be noted that the target frequency value is the frequency value of the target signal, and the state switching frequency threshold is a user-defined frequency value. The state switching frequency threshold is greater than or equal to the limit frequency threshold. For example, if the limit frequency threshold is 1000 Hz, the state switching frequency threshold can be preset to 1500 Hz. If the target frequency value is greater than or equal to the state switching frequency threshold, it means that the main frequency of the sound generated by the user is greater than or equal to the state switching frequency threshold. In this case, it is not necessary for the third microphone 130 to reduce the noise below the limit frequency threshold through bone conduction, and the first microphone 110 and the second microphone 120 can be used to collect the sound. If the target frequency value is less than the state switching frequency threshold, it means that the main frequency of the sound generated by the user is less than the state switching frequency threshold, and it is necessary to turn on the third microphone 130 to collect the human voice below the limit frequency threshold and reduce the noise below the limit frequency threshold.

[0068] In one embodiment, multiple state switching frequency thresholds can be set to divide different frequency regions. For example, the first state switching frequency threshold is 1000 Hz, the second state switching frequency threshold is 2000 Hz, 0 - 1000 Hz is the low-frequency region, 1000 Hz - 2000 Hz is the mid-frequency region, and above 2000 Hz is the high-frequency region. In some embodiments, if the target frequency value of the target signal is less than the first state switching frequency threshold, it is determined that the third microphone 130 is in the on state. If the target frequency value is greater than or equal to the second state switching frequency threshold, it is determined that the third microphone 130 is in the off state.

[0069] In some embodiments, if the target frequency value is greater than or equal to the first state switching frequency threshold and less than the second state switching frequency threshold, timing is performed to obtain a duration. If the duration is greater than a preset time threshold, it is determined that the third microphone 130 is in the off state.

[0070] In some embodiments, the main circuit board 140 is further provided with a signal-to-noise ratio detector; the signal-to-noise ratio detector is connected to the control module 141, and the control module 141 is further configured to: filter the target signal and analyze to obtain a target noise value; the signal-to-noise ratio detector is configured to: compare the target noise value with a preset noise threshold; the control module 141, in response to the target noise value being greater than or equal to the noise threshold, switches the third microphone 130 from the on state to the off state.

[0071] The advantage of this embodiment is that by comparing the target noise value with the preset noise threshold and controlling the state of the third microphone 130 according to the comparison result, the noise reduction method of the true wireless Bluetooth headset can be flexibly adjusted.

[0072] It should be noted that the target noise value is the noise value of the target signal, and the noise threshold is a user-defined noise value. For example, the noise threshold can be 50 dB (decibels). If the target noise value is greater than or equal to the noise threshold, it indicates that the noise in the environment is relatively large, and the third microphone 130 needs to be turned on to eliminate noise through bone conduction.

[0073] Please refer to Figure 1 and Figure 5 , in some embodiments, the earphone body 100 further includes a speaker 170, a first microphone sleeve (not shown in the figure) and a second microphone sleeve (not shown in the figure); the earphone lower shell 160 is provided with a sound outlet hole 161 and a phase inversion hole 162, and a tuning net (not shown in the figure) is arranged in the phase inversion hole 162.

[0074] The speaker 170 is connected to the main circuit board 140. The first microphone sleeve is sleeved on the first microphone 110, and the second microphone sleeve is sleeved on the second microphone 120. The speaker 170 is used to receive the electrical signal output by the control module 141 and convert the electrical signal into a sound signal. The tuning net is used to control the air permeability to adjust the sound signal output by the speaker 170.

[0075] The advantages of this embodiment are that vibration damping is carried out through the first microphone sleeve and the second microphone sleeve to avoid the influence of vibration on sound collection, ensure the clarity of the voice collected by the truly wireless Bluetooth headset, and improve the communication quality. Moreover, by controlling the air permeability through the tuning net and adjusting the sound signal output by the speaker 170, the clarity of the sound signal heard by the user can be improved, and the call quality can be improved.

[0076] It should be noted that the first microphone sleeve is used for vibration damping of the first microphone 110, and the second microphone sleeve is used for vibration damping of the second microphone 120. The sound outlet hole 161 is used to transmit the sound signal of the speaker 170 out of the earphone body 100. The tuning net can adjust the air permeability of the phase inversion hole 162, thereby adjusting the air pressure inside the earphone body 100. Among them, the vibration of the speaker 170 is affected by the air pressure. If the air pressure is unbalanced, it will affect the vibration of the speaker 170, thereby affecting the sound signal output by the speaker 170. Therefore, by adjusting the air permeability through the tuning net, the air pressure balance can be ensured, the diaphragm of the speaker 170 can vibrate normally, thereby improving the sound quality and reducing the sound distortion.

[0077] Specifically, the diameter of the speaker 170 is 10 - 30 mm, and its main function is to receive the audio electrical signal output by the control module 141, convert the electrical signal into a sound signal, and transmit the sound signal into the ear canal through the sound outlet hole 161 of the earphone body 100.

[0078] In some embodiments, a metal mesh is arranged on the sound outlet hole 161. The metal mesh can prevent sundries from entering the inside of the earphone body 100, prevent damage to the speaker 170 resulting in the deterioration of the sound quality, and improve the reliability of the truly wireless Bluetooth headset.

[0079] Please refer to Figure 5 , in some embodiments, the earphone body 100 further includes a rear cavity housing 180 and a double-sided adhesive layer 190; the double-sided adhesive layer 190 adheres the main circuit board 140 and the rear cavity housing 180, and the rear cavity housing 180 is connected to the speaker 170.

[0080] The advantage of this embodiment is that the main circuit board 140 and the rear cavity housing 180 are adhered by the double-sided adhesive layer 190, and the rear cavity housing 180 is connected to the speaker 170, thereby fixing the various components inside the earphone body 100, preventing the various components inside the earphone body 100 from loosening, and improving the reliability of the true wireless Bluetooth earphone.

[0081] It should be noted that the rear cavity housing 180 is used to form the rear cavity of the speaker 170 and fix the main circuit board 140.

[0082] Please refer to Figure 2 and Figure 5 , in some embodiments, the earphone upper shell 150 is provided with a first sound guide hole 151 and a second sound guide hole 152; the first sound guide hole 151 is located at one end of the earphone upper shell 150 close to the user's mouth, and the second sound guide hole 152 is located at one end of the earphone upper shell 150 far from the user's mouth. The first microphone 110 has a first sound pickup hole (not shown in the figure), and the second microphone 120 has a second sound pickup hole (not shown in the figure); the first sound pickup hole corresponds to the first sound guide hole 151, and the second sound pickup hole corresponds to the second sound guide hole 152.

[0083] The advantage of this embodiment is that by processing the first voice signal collected by the first microphone 110 and the second voice signal collected by the second microphone 120, the noise and the human voice in the signal can be distinguished, the noise reduction processing effect can be improved, and the communication quality can be improved.

[0084] It should be noted that the first sound pickup hole of the first microphone 110 is close to the user's mouth, and the second sound pickup hole of the second microphone 120 is far from the user's mouth; both the first sound pickup hole and the second sound pickup hole face the earphone upper shell 150. Among them, the first microphone 110 is mainly used to collect the user's voice; the second microphone 120 is mainly used to collect environmental noise.

[0085] Please refer to Figure 5 , in some embodiments, the earphone body 100 further includes a first waterproof net 111 and a second waterproof net 121; the first waterproof net 111 is disposed between the earphone upper shell 150 and the first microphone 110, and the second waterproof net 121 is disposed between the earphone upper shell 150 and the second microphone 120.

[0086] It should be noted that the first waterproof net 111 and the second waterproof net 121 are used for waterproofing and dustproofing.

[0087] The advantage of this embodiment is that through the first waterproof net 111 and the second waterproof net 121, the waterproof and dustproof effects of the true wireless Bluetooth headset are improved, and the reliability of the product is enhanced.

[0088] Please refer to Figure 6 , in some embodiments, the earhook 200 includes a rotating shaft 210; the earhook 200 is rotatably connected to the headset body 100 through the rotating shaft 210; the rotating shaft 210 is used to adjust the rotation angle between the earhook 200 and the headset body 100 so that the headset body 100 fits the user's ear.

[0089] The advantage of this embodiment is that the rotation angle between the earhook 200 and the headset body 100 can be adjusted through the rotating shaft 210 so that the headset body 100 fits the user's ear, making the shape of the true wireless Bluetooth headset adjustable and enabling the user to wear the true wireless Bluetooth headset more comfortably.

[0090] Specifically, the rotating shaft 210 can be a spring rotating shaft. When the user wears the true wireless Bluetooth headset, the elastic force of the spring rotating shaft is used to adjust the rotation angle between the earhook 200 and the headset body 100.

[0091] It should be noted that the earhook 200 is connected to the headset body 100 through the rotating shaft 210, which can not only firmly fix the headset on the ear to prevent the headset from falling or loosening during the user's activities, but also disperse the pressure of the headset on the ear and reduce the discomfort during long-term wearing of the headset. The headset and the rotating shaft 210 can provide a more stable and comfortable headset wearing experience, suitable for various scenarios such as sports and work.

[0092] In some embodiments, the headset body 100 further includes a flexible printed circuit board (Flexible Printed Circuit, abbreviated as FPC). The third microphone 130 is disposed on the flexible printed circuit board, and the flexible printed circuit board is connected to the main circuit board 140; the flexible printed circuit board is used to output the third voice signal collected by the third microphone 130 to the control module 141 on the main circuit board 140.

[0093] Please refer to Figure 5 , in some embodiments, both the first microphone 110 and the second microphone 120 are silicon microphones, and the first microphone 110 and the second microphone 120 are respectively mounted on the main circuit board 140.

[0094] The advantage of this embodiment is that the silicon microphone has a small volume, which can reduce the volume of the true wireless Bluetooth headset and improve the portability of the product.

[0095] In some embodiments, the battery compartment 300 includes battery cells. The battery cells are connected to the main circuit board 140 inside the earphone body 100 through battery connection wires in the ear hook 200, and the battery cells are used to supply power to the main circuit board 140, the first microphone 110, the second microphone 120, and the third microphone 130.

[0096] The embodiments described in the embodiments of the present application are for more clearly explaining the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0097] It should be noted that the above content is a further detailed description of the present invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. At the same time, in the field of earphone technology, in terms of universality, without contradiction, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples. For the earphones specifically described above, when there is no violation in terms of structure, technology, and function, the mentioned earphones can be selected as wired earphones / Bluetooth earphones / TWS true wireless Bluetooth earphones, neck-mounted earphones / head-mounted earphones / plug earphones / clip earphones, over-ear / on-ear / in-ear (earplug) earphones, and for professional type earphones, they can be selected as sports earphones, music earphones, open earphones, bone conduction earphones, AI artificial intelligence earphones. In addition, for those of ordinary skill in the art to which the present invention pertains, without departing from the concept of the present invention, they can also make several substitutions or modifications to these described embodiments, and these substitution or modification methods should all be regarded as belonging to the protection scope of the present invention. In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "preferred embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and alterations can be made herein without departing from the scope defined by the appended claims.

[0098] Those skilled in the art can understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than those shown in the figures, or combine certain steps, or different steps.

[0099] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0100] Those of ordinary skill in the art can understand that the functional modules / units in the systems and devices disclosed above can be implemented as software, firmware, hardware, and their appropriate combinations.

[0101] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of this application and the above-mentioned drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order different from those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, system, product, or device that includes a series of steps or units does not necessarily limit to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, products, or devices.

[0102] It should be understood that in this application, "at least one (item)" means one or more, and "multiple" means two or more. "And / or" is used to describe the association relationship of associated objects and indicates that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B can be singular or plural. The character " / " generally means that the associated objects before and after are in an "or" relationship. "At least one (one)" or similar expressions below refer to any combination of these items, including any combination of single item (one) or plural items (ones). For example, at least one (one) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0103] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the above units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. The displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in electrical, mechanical or other forms.

[0104] The units described above as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0105] In addition, each functional unit in various embodiments of the present application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0106] The preferred embodiments of the embodiments of the present application have been described above with reference to the drawings, but this does not limit the scope of rights of the embodiments of the present application. Any modification, equivalent replacement and improvement made by those skilled in the art without departing from the scope and essence of the embodiments of the present application shall be within the scope of rights of the embodiments of the present application.

Claims

1. A true wireless Bluetooth headset, characterized in that: The true wireless Bluetooth headset comprises: an earphone body, an ear hook and a battery compartment, and the earphone body comprises a housing, a first microphone, a second microphone, a third microphone and a main circuit board; The main circuit board, the first microphone, the second microphone and the third microphone are located inside the housing; the main circuit board includes a control module, the control module is connected to the first microphone, the second microphone and the third microphone, and the third microphone is a bone conduction microphone; The first acquisition frequency of the first microphone is greater than or equal to a limiting frequency threshold, and the first microphone is used to acquire a first voice signal; wherein the limiting frequency threshold is the lowest acquisition frequency of the first microphone; The second collection frequency of the second microphone is greater than or equal to the limiting frequency threshold, and the second microphone is used to collect a second voice signal; The third collection frequency of the third microphone is less than the limiting frequency threshold, and the third microphone is used to collect a third voice signal; The control module is configured to: perform noise reduction processing and echo cancellation on the first voice signal, the second voice signal and the third voice signal to obtain a target signal.

2. The true wireless Bluetooth headset according to claim 1, characterized in that: The housing comprises an upper housing and a lower housing, wherein the lower housing is a side of the housing close to the ear, and the upper housing is a side of the housing far from the ear; the third microphone is attached to a sound collection area of ​​the lower housing, and the sound collection area is an area where the lower housing contacts the ear; The control module is further configured to: in response to a target frequency value of the target signal being greater than or equal to a preset state switching frequency threshold, switch the third microphone from an on state to an off state.

3. The true wireless Bluetooth headset according to claim 2, characterized in that: The main circuit board is also provided with a signal-to-noise ratio detector; The signal-to-noise ratio detector is connected to the control module, and the control module is further configured to: filter the target signal and analyze to obtain a target noise value; the signal-to-noise ratio detector is configured to: compare the target noise value with a preset noise threshold; In response to the target noise value being greater than or equal to the noise threshold, the control module switches the third microphone from an on state to an off state.

4. The true wireless Bluetooth headset according to claim 2, characterized in that: The earphone body also includes a speaker, a first microphone sleeve and a second microphone sleeve; the earphone lower shell is provided with a sound outlet and a bass reflex hole, and a tuning net is provided in the bass reflex hole; The speaker is connected to the main circuit board; the first microphone cover is mounted on the first microphone, and the second microphone cover is mounted on the second microphone; The speaker is used to receive the electrical signal output by the control module and convert the electrical signal into a sound signal; the tuning network is used to control the air permeability to adjust the sound signal output by the speaker.

5. The true wireless Bluetooth headset according to claim 4, characterized in that: The earphone body also includes a rear cavity shell and a double-sided adhesive layer; The double-sided adhesive layer adheres the main circuit board to the rear cavity shell, and the rear cavity shell is connected to the speaker.

6. The true wireless Bluetooth headset according to any one of claims 2 to 5, characterized in that: The earphone upper shell is provided with a first sound guide hole and a second sound guide hole; the first sound guide hole is located at an end of the earphone upper shell close to the user's mouth, and the second sound guide hole is located at an end of the earphone upper shell away from the user's mouth; The first microphone has a first sound pickup hole, and the second microphone has a second sound pickup hole; the first sound pickup hole corresponds to the first sound guide hole, and the second sound pickup hole corresponds to the second sound guide hole.

7. The true wireless Bluetooth headset according to claim 2, characterized in that: The earphone body further includes a first waterproof net and a second waterproof net; The first waterproof net is arranged between the earphone upper shell and the first microphone, and the second waterproof net is arranged between the earphone upper shell and the second microphone.

8. The true wireless Bluetooth headset according to claim 1, characterized in that: The ear hook includes a rotating shaft; The ear hook is rotatably connected to the earphone body via the rotating shaft; the rotating shaft is used to adjust the rotation angle between the ear hook and the earphone body so that the earphone body fits the ear of the user.

9. The true wireless Bluetooth headset according to claim 1, characterized in that: The earphone body also includes a flexible circuit board; The third microphone is arranged on the flexible circuit board, and the flexible circuit board is connected to the main circuit board; The flexible circuit board is used to output the third voice signal collected by the third microphone to the control module on the main circuit board.

10. The true wireless Bluetooth headset according to claim 1, characterized in that: The first microphone and the second microphone are both silicon microphones; the first microphone and the second microphone are mounted on the main circuit board respectively.

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