Sound production device and earphone

Abstract

The utility model discloses a sound production device and an earphone, the sound production device comprises a shell and two microphone assemblies, the shell is provided with two pickup holes, the two pickup holes are correspondingly communicated with pickup channels of the two microphone assemblies, and one pickup hole faces the mouth of a user. The central points of the sides, far away from the accommodating cavity, of the two pickup holes are located on a first connecting line, the included angle A formed by the projection of the first connecting line on the sagittal plane of a user and the horizontal line is larger than or equal to 30 degrees and smaller than or equal to 90 degrees, and therefore the microphone close to the mouth can more effectively distinguish the voice of the user from noise in the surrounding environment, and the user experience is improved. The voice of a user can be captured more directly and more accurately, so that the target voice of a call is clearer.

Description

Technical Field

[0001] This application relates to the field of headphone technology, and more particularly to a sound-generating device and headphones. Background Technology

[0002] Dual-microphone arrays use the time difference or phase difference of sound arriving at the two microphones to calculate the location of the sound, thereby capturing human voices in a specific direction and performing sound tracking. Through algorithm processing, functions such as noise reduction and echo cancellation can be achieved.

[0003] In related technologies, when making calls with open-back headphones, the ambient noise is relatively loud, and the other party hears too much ambient noise, resulting in unclear target speech. Utility Model Content

[0004] This application provides a sound-generating device and headphones, which can solve the technical problem that the target voice is unclear when the other party hears too much ambient noise during open-back headphone calls due to the large amount of ambient noise.

[0005] In a first aspect, embodiments of this application provide a sound-generating device for wearing inside a user's concha, comprising:

[0006] The outer casing has a receiving cavity and two pickup holes communicating with the receiving cavity, the two pickup holes being arranged opposite to each other; and

[0007] Two microphone assemblies are disposed within the receiving cavity, the microphone assemblies forming a pickup channel, and the pickup channel of the two microphone assemblies respectively communicating with the two pickup holes;

[0008] When the sound-generating device is worn in the user's concha, one of the pickup holes faces the user's mouth, and the center points of the two pickup holes on the side away from the receiving cavity are located on a first connecting line. The angle formed by the projection of the first connecting line onto the user's sagittal plane and the horizontal line is A, where A satisfies: 30°≤A≤90°.

[0009] In some embodiments, the axes of the two pickup holes are set at an angle, and the angle formed by the axes of the two pickup holes is B, which satisfies 90°≤B≤180°.

[0010] In some embodiments, the straight-line distance between the center points of the two pickup holes on the side away from the receiving cavity is h, where h satisfies: 1.5cm ≤ h ≤ 3.5cm.

[0011] In some embodiments, the two pickup holes have the same diameter;

[0012] And / or, the two pickup holes are of the same length.

[0013] In some embodiments, the microphone assembly includes:

[0014] A housing having the pickup channel, the housing being connected to the outer shell; and

[0015] A sealing ring having a sealing channel is provided. Along the extending direction of the sealing channel, one side of the sealing ring is connected to the outer shell, and the other side of the sealing ring is connected to the housing.

[0016] The pickup hole, the sealing channel, and the pickup channel are connected.

[0017] In some embodiments, the housing includes:

[0018] The outer casing body has the receiving cavity and the pickup hole formed therefrom; and

[0019] A mounting plate is disposed within the receiving cavity and connected to the outer shell body;

[0020] The housing is connected to the mounting plate, and the housing is spaced apart from the outer shell body.

[0021] In some embodiments, the microphone assembly further includes:

[0022] A circuit board is disposed on the side of the pickup channel away from the corresponding sealing ring and connected to the housing; and

[0023] A dustproof mesh is attached to the side of the circuit board facing the pickup channel.

[0024] In some embodiments, at least a portion of the sealing ring elastically abuts against the side of the dustproof mesh facing away from the circuit board.

[0025] In some embodiments, the inner surface of the housing is provided with a mounting groove surrounding the pickup hole, and at least a portion of the sealing ring extends into the mounting groove.

[0026] Secondly, embodiments of this application provide an earphone, including:

[0027] The aforementioned sound-generating device is for wearing inside the concha of a user's ear.

[0028] Battery compartment, for wearing behind the user's earlobe; and

[0029] The ear hook has a first end connected to the sound-generating device and a second end connected to the battery compartment.

[0030] The sound-generating device and earphone based on the embodiments of this application include a housing and two microphone assemblies. The housing has two pickup holes, which are correspondingly connected to the pickup channels of the two microphone assemblies. One of the pickup holes faces the user's mouth, and the center points of the two pickup holes on the side away from the receiving cavity are located on a first line. The angle formed by the projection of the first line onto the user's sagittal plane and the horizontal line is A, where A satisfies: 30°≤A≤90°. Thus, the microphone close to the mouth can more effectively distinguish the user's voice from the noise in the surrounding environment, and can capture the user's voice more directly and accurately, making the target voice in the call clearer. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of the earphone provided in an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of the earphones worn on the user's ear according to an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the structure of the sound-generating device provided in the embodiments of this application;

[0035] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at point AA;

[0036] Figure 5 This is a schematic diagram of the microphone assembly provided in an embodiment of this application;

[0037] Figure 6 This is a partial structural schematic diagram of a microphone assembly provided in an embodiment of this application.

[0038] Figure reference numerals:

[0039] 1. Headphones;

[0040] 100. Sound-generating device; 110. Housing; 111. Housing body; 112. Mounting plate; 110a. Receiving cavity; 110b. Sound pickup hole; 120. Microphone assembly; 120a. Sound pickup channel; 121. Housing; 122. Sealing ring; 123. Circuit board; 124. Dustproof mesh;

[0041] 200. Battery compartment;

[0042] 300. Ear hooks. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0044] Dual-microphone ENC (Environmental Noise Cancellation) is an advanced noise reduction technology that utilizes a dual-microphone array to effectively suppress ambient noise. The two microphones precisely calculate the location of the speaker. One microphone acts as the primary microphone, collecting the human voice (the target speech), while the other serves as a reference microphone, capturing surrounding environmental noise. The signals from these two microphones are processed by digital signal processing algorithms to filter out various interfering noises in the environment, preserving the clarity of the target speech.

[0045] In related technologies, when making calls with open-back headphones, the ambient noise is relatively loud, and the other party hears too much ambient noise, resulting in unclear target speech.

[0046] To resolve the above issues, please refer to [link / reference]. Figure 1-2 This application provides a sound-generating device 100 for wearing inside a user's ear canal. The sound-generating device 100 includes a housing 110 and two microphone assemblies 120.

[0047] Please see Figure 3-4 The housing 110 serves as the exterior component of the entire sound-generating device 100. Its material can be plastic or metal, such as titanium alloy or aluminum alloy. An internal cavity 110a is formed within the housing 110, providing mounting space for the microphone assembly 120, speaker unit, and other internal components. The housing 110 forms two pickup holes 110b, which allow external sound to enter the cavity 110a and be captured by the microphone assembly 120. The relative arrangement of the pickup holes 110b helps reduce sound interference and improve pickup accuracy.

[0048] Microphone assembly 120 forms a pickup channel 120a. Each microphone assembly 120 includes a pickup channel 120a for capturing sound entering from the pickup hole 110b. The two microphone assemblies 120 work together to achieve ENC, which can identify and cancel background noise, thereby providing a clear voice signal. One of them is the main microphone assembly 120, and the other is the secondary microphone assembly 120.

[0049] When the sound-generating device 100 is worn in the user's ear canal, one of the pickup holes 110b faces the user's mouth, and the microphone corresponding to the pickup hole 110b is the main microphone assembly 120. Since the two pickup holes 110b are set opposite to each other, the other pickup hole 110b is away from the user, that is, facing the back of the head. In this way, the two microphone assemblies 120 can avoid mutual interference and can also ensure accurate capture of background noise.

[0050] Please continue reading for more details. Figure 4 The center point of the two pickup holes 110b on the side away from the receiving cavity 110a is located on the first connecting line. The angle formed by the projection of the first connecting line onto the user's sagittal plane and the horizontal line is A. A satisfies: 30°≤A≤90°. Specifically, A can be any range between 30°, 50°, 70°, 90° or more. With A within the above range, the microphone close to the mouth can more effectively distinguish the user's voice from the noise in the surrounding environment. Since the voice signal is usually stronger than the background noise, the microphone close to the sound source can more easily capture clear voice while reducing the interference of background noise.

[0051] Meanwhile, since the pickup hole 110b of the main microphone assembly 120 is close to the user's mouth, the close-range pickup reduces the attenuation and distortion of sound in the air, and can capture the user's voice more directly and accurately, thereby improving the clarity and quality of the voice.

[0052] It should be noted that in medicine, anatomy, and other fields, the human body can be defined by three basic planes: the sagittal plane, the coronal plane, and the horizontal plane, as well as three basic axes: the sagittal axis, the coronal axis, and the vertical axis. The sagittal plane is a plane perpendicular to the ground along the anterior-posterior direction of the body, dividing the body into left and right parts. The coronal plane is a plane perpendicular to the ground along the lateral direction of the body, dividing the body into anterior and posterior parts. The horizontal plane is a plane parallel to the ground along the vertical direction of the body, dividing the body into upper and lower parts. When the earphone 1 is worn on the ear, observing the ear of the simulator along the direction of the coronal axis of the human body yields... Figure 2 The diagram shown is a schematic of the ear and the headphone 1.

[0053] For further information, please refer to [link / reference]. Figure 4In one embodiment, the axes of the two pickup holes 110b are arranged at an angle, and the angle formed by the axes of the two pickup holes 110b is B. B satisfies 90°≤B≤180°. Specifically, B can be any range between 90°, 120°, 150°, 180° or more. By B being within the above range, the design of the housing 110 of the sound-generating device 100 with different shapes can be satisfied, especially for some sound-generating devices 100 with curved surfaces of the housing 110. In this embodiment, the two pickup holes 110b are parallel, that is, the included angle B is 180°, for illustrative purposes.

[0054] It is important to understand that the line connecting the center points of the two sides opposite to the receiving cavity 110a is defined as 0° in the direction pointing towards the main microphone assembly 120. Conversely, the line pointing towards the secondary microphone assembly 120 is defined as 180°. The main microphone assembly 120 is positioned close to the user's mouth, thus minimizing the reduction of ambient noise between 180° and 270°, i.e., minimizing ambient noise behind the user.

[0055] In another embodiment of this application, please refer to [the document for further details]. Figure 4 The straight-line distance between the center points of the two pickup holes 110b on the side away from the receiving cavity 110a is h, which satisfies: 1.5cm≤h≤3.5cm. Specifically, B can be any two of 1.5cm, 2cm, 2.5cm, 3.5cm or more. By keeping h within the above range, the distance between the two pickup holes 110b is appropriate, which can reduce the signal interference of the two microphone components 120 and ensure the performance of the headphone 1.

[0056] In addition, within a suitable range, B can handle a wider frequency range, meaning that the frequency range that headphone 1 can handle is less restricted, especially in the high-frequency part, which can effectively eliminate high-frequency noise, thereby improving the noise reduction effect and voice clarity of headphone 1.

[0057] In another embodiment of this application, the two pickup holes 110b have the same aperture.

[0058] When sound reaches the two pickup holes 110b from the same distance, assuming that the aperture and length of the pickup holes 110b are the same, the phase change of the sound as it passes through the pickup holes 110b will also be consistent, which can reduce signal interference caused by phase difference between the two microphones.

[0059] On the other hand, during the sound pickup process, it is necessary to ensure the consistency of gain in order to ensure the true reproduction of the sound. With the gain of the two pickup holes 110b being the same, the sound arrives from the same distance, which helps to ensure that the gain of the two microphones is consistent, thereby improving the stability of the sound pickup effect.

[0060] Please see Figure 4-5 In one embodiment of this application, the microphone assembly 120 includes a housing 121 and a sealing ring 122. The microphone assembly 120 may refer to a main microphone assembly 120 or a secondary microphone assembly 120.

[0061] The housing 121 is the main structure of the microphone assembly 120, and a pickup channel 120a is formed inside it. The pickup channel 120a enables sound signals to enter the microphone from the external environment along a preset path.

[0062] The sealing ring 122 forms a sealing channel. Along the extending direction of the sealing channel, one side of the sealing ring 122 is connected to the housing 110, and the other side is connected to the housing 121. That is, the sealing channel of the sealing ring 122 connects the pickup hole 110b and the pickup channel 120a, allowing the sound signal received by the pickup hole 110b to smoothly enter the pickup channel 120a from the external environment through the sealing channel. Because the sealing ring 122 provides good sealing along the sound signal transmission path, it helps reduce sound leakage and loss during transmission, thereby improving sound transmission efficiency. When the sound signal enters the microphone assembly 120 through the pickup hole 110b, the sealing ring 122 ensures that the sound signal is smoothly transmitted to the pickup channel 120a along the predetermined acoustic channel, reducing sound signal attenuation and distortion.

[0063] In addition, the sealing ring 122 helps maintain the phase consistency of sound signals between different microphones by ensuring that the sound signal is transmitted along the predetermined acoustic channel, which can reduce signal interference caused by phase difference and improve the coherence and clarity of the sound signal.

[0064] The sealing ring 122 can be made of elastic material, such as rubber or silicone. Under the action of elastic force, the sealing ring 122 can be more tightly connected to the outer shell 110 and the housing 121, ensuring the sealing of the entire pickup path.

[0065] Furthermore, please refer to Figure 4 The housing 110 includes a housing body 111 and a mounting plate 112. The housing body 111 forms a receiving cavity 110a and a pickup hole 110b. The mounting plate 112 is disposed in the receiving cavity 110a and protrudes from the inner side of the housing body 111. The housing 121 of the microphone assembly 120 is connected to the mounting plate 112, and the housing 121 is spaced apart from the housing body 111.

[0066] The housing 121 and the outer shell body 111 are spaced apart, meaning that the housing 121 and the outer shell body 111 do not directly contact each other, but indirectly contact each other through the mounting plate 112 and the sealing ring 122. Therefore, the direct impact of vibration in the external environment on the internal structure of the microphone assembly 120 can be reduced, which helps to improve the microphone's vibration resistance and reduce noise interference caused by vibration. Furthermore, due to the presence of the sealing ring 122, nonlinear echoes can be reduced.

[0067] Specifically, in this embodiment, the housing 121 and the mounting plate 112 are in contact. Please refer to [link / reference]. Figure 4 The mounting plate 112 and the outer shell body 111 form a positioning groove, and the microphone is snapped into the positioning groove. The microphone assembly 120 abuts against the mounting plate 112 through the housing 121 and the sealing ring 122 elastically abuts against the outer shell body 111, thereby enabling the housing 121 and the outer shell body 111 to be spaced apart.

[0068] In another embodiment of this application, please refer to Figure 5-6 The microphone assembly 120 also includes a circuit board 123 and a dustproof mesh 124. The circuit board 123 is located on the side of the pickup channel 120a away from the corresponding sealing ring 122 and is connected to the housing 121. That is, the circuit board 123 is located at the end of the pickup path and can be connected to the housing 121 by glue or screws.

[0069] It is important to understand that the circuit board 123 is a key component in the microphone assembly 120 that converts sound signals into electrical signals and amplifies them. When sound waves enter the microphone through the pickup channel 120a, they cause the sensitive elements inside the microphone (such as the diaphragm) to vibrate. These vibrations are then converted into weak electrical signals. Of course, the circuit board 123 can also perform further processing on the sound signals, such as filtering, noise reduction, and equalization.

[0070] The dustproof mesh 124 is connected to the side of the circuit board 123 facing the pickup channel 120a, that is, facing the pickup hole 110b and the pickup channel 120a. In this way, the dustproof mesh 124 is connected to the side of the circuit board 123 facing the pickup channel 120a, which plays a good role in dust prevention. It can block dust, fine particles and impurities in the external environment from entering the circuit board 123, thereby protecting the internal structure of the microphone assembly 120 from damage.

[0071] The dustproof mesh 124 can be adhesively bonded to the housing 121, and may include a mesh body and a waterproof coating laminated on the mesh body. For example, the mesh body is woven from fibrous material to form a porous mesh structure.

[0072] Optionally, the fiber material includes at least one selected from polyester fiber (i.e., polyester), polyamide fiber (i.e., nylon), polyvinyl alcohol fiber (i.e., vinylon), polyacrylonitrile fiber (i.e., acrylic fiber), polypropylene fiber (i.e., polypropylene fiber), and polyvinyl chloride fiber (i.e., chlorofiber). A waterproof coating is applied to the surface of the fiber body. The waterproof coating can be selected from materials commonly used in the art, so that the dustproof mesh 124 can also have good waterproof function, that is, it can further protect the circuit board 123.

[0073] Based on the previous embodiment, please refer to the following further examples. Figure 6 At least part of the sealing ring 122 elastically abuts against the side of the dustproof mesh 124 away from the circuit board 123. As a buffer layer between the dustproof mesh 124 and the microphone assembly 120, the sealing ring 122 can absorb part of the external impact and vibration, protect the dustproof mesh 124 and the microphone assembly 120 from physical damage, and improve the durability and service life of the microphone assembly 120.

[0074] On the other hand, since the sealing ring 122 elastically abuts against the dustproof mesh 124, the dustproof mesh 124 can better fit the circuit board 123, which can reduce the entry of water, sweat and dust into the circuit board 123, thereby better protecting the circuit board 123.

[0075] In one embodiment of this application, the inner surface of the housing 110 is provided with a mounting groove, which surrounds the pickup hole 110b, and a portion of the sealing ring 122 extends into the mounting groove.

[0076] The mounting groove designed around the pickup hole 110b provides a precise positioning space for the sealing ring 122, ensuring that the sealing ring 122 can be accurately aligned around the pickup hole 110b during installation, thus avoiding sealing problems caused by positional deviation.

[0077] In addition, part of the sealing ring 122 extends into the mounting groove, forming a tight assembly relationship. This embedded design not only enhances the connection strength between the sealing ring 122 and the housing 110, but also reduces the risk of the sealing ring 122 falling off or shifting due to external forces (such as vibration and impact), thereby improving the stability and durability of the overall structure.

[0078] Please return to the reference. Figure 1 This application embodiment also provides an earphone 1, including the sound-generating device 100 in the above embodiment. The earphone 1 can be an open-back earphone 1, an in-ear earphone 1, or a semi-in-ear earphone 1, etc., which will not be explained one by one here. In this application embodiment, the earphone 1 is described as an open-back earphone 1, and in particular refers to the earphone 1 with an ear hook 300.

[0079] The earphone 1 includes a sound-generating device 100, a battery compartment 200, and an ear hook 300.

[0080] The battery compartment 200 is the power supply part of the earphone 1. It contains a power source and related circuit components to provide power to the sound-generating device 100 and other functional components of the earphone 1. The battery compartment 200 is worn behind the user's earlobe and can work together with the sound-generating device 100 to ensure the stability of the earphone 1 when worn.

[0081] The sound-generating device 100 is the main audio output part of the earphone 1. It is generally worn inside the user's ear canal. It contains an audio driver unit (such as a speaker) to convert electrical signals into sound signals and output them to the user.

[0082] The ear hook 300 connects the sound-generating device 100 and the battery compartment 200, ensuring a stable connection and mechanical strength between the two. The ear hook 300 allows the earphone 1 to be securely worn on the user's ears, preventing it from easily falling off even during exercise or activity. The ear hook 300 may include conductive wires and memory metal wires. The conductive wires enable electrical connection between the electrical components of the sound-generating device 100 and the electrical components of the battery compartment 200. The memory metal wires connect the sound-generating device 100 and the battery compartment 200. Due to the super-elastic properties of the memory metal wires, the sound-generating device 100 and the battery compartment 200 tend to move closer to each other, thereby allowing the earphone 1 to be securely worn on the user's ears.

[0083] The shell 121 of the ear hook 300 can be made of thermoplastic elastic materials such as silicone. Silicone is soft and elastic, and can closely conform to the contours of the ear, reducing pressure during long-term wear. In addition, silicone has high abrasion resistance, which can resist friction and wear in daily use, extending the life of the ear hook 300.

[0084] The shape memory wire can be titanium shape memory wire, nickel-titanium alloy wire, copper-based shape memory wire (such as copper-zinc alloy, copper-aluminum alloy, etc.) and iron-based shape memory wire (such as iron-manganese alloy, iron-platinum alloy, etc.), etc. This application does not limit the type of shape memory wire.

[0085] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0086] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sound production device for wearing in a concha cavity of a user, characterized in that, The sound production device comprises: a housing, which is formed with a receiving cavity and two sound pickup holes communicating with the receiving cavity, and the two sound pickup holes are oppositely arranged; two microphone assemblies, which are arranged in the receiving cavity, and the microphone assemblies form sound pickup channels, and the sound pickup channels of the two microphone assemblies respectively communicate with the two sound pickup holes; wherein, in the state that the sound production device is worn in the concha cavity of a user, one of the sound pickup holes faces the mouth of the user, and the center points of the two sound pickup holes away from the receiving cavity side are located on a first line, and the projection of the first line on the sagittal plane of the user forms an angle A with the horizontal line, and A satisfies 30°≤A≤90°. The axes of the two sound pickup holes are arranged at an angle, and the angle formed by the axes of the two sound pickup holes is B, and B satisfies 90°≤B≤180°.

2. The sound production device of claim 1, wherein, The straight-line distance between the center points of the two sound pickup holes away from the receiving cavity side is h, and h satisfies 1.5cm≤h≤3.5cm.

3. The sound production device of claim 1, wherein, The hole diameters of the two sound pickup holes are the same.

4. The sound production device of claim 1, wherein, And / or, the lengths of the two sound pickup holes are the same. The microphone assembly comprises:

5. The sound production device of claim 1, wherein, a shell, which is formed with the sound pickup channel, and the shell is connected with the housing; and a sealing ring, which is formed with a sealing channel, and one side of the sealing ring is connected with the housing along the extension direction of the sealing channel, and the other side of the sealing ring is connected with the shell; wherein, the sound pickup hole, the sealing channel and the sound pickup channel communicate. The housing comprises:

6. The sound production device of claim 5, wherein, a housing body, which is formed with the receiving cavity and the sound pickup hole; and a mounting plate, which is arranged in the receiving cavity and connected with the housing body; wherein, the shell is connected with the mounting plate, and the shell and the housing body are arranged at intervals. The microphone assembly further comprises:

7. The sound production device of claim 5, wherein, a circuit board, which is arranged on the side of the sound pickup channel away from the corresponding sealing ring and connected with the shell; and a dust screen cloth, which is connected on the side of the circuit board facing the sound pickup channel. At least part of the sealing ring elastically abuts against the side of the dust screen cloth away from the circuit board.

8. The sound production device of claim 7, wherein, An inner surface of the housing is provided with a mounting groove, the mounting groove is arranged around the sound pickup hole, and part of the sealing ring extends into the mounting groove.

9. The sound production device of claim 5, wherein, The sound production device comprises:

10. An earphone, characterized by the sound production device according to any one of claims 1-9, which is used for being worn in the concha cavity of a user; a battery compartment, which is used for being worn behind the tragus of the user; and an ear hook, a first end of the ear hook is connected with the sound production device, and a second end of the ear hook is connected with the battery compartment. ​ ​

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