A pair of headphones and a mobile terminal

Abstract

This application provides an earphone and a mobile terminal. The earphone includes a housing and a speaker assembly. The housing contains a front cavity and a rear cavity separated by the speaker assembly. The front cavity is located on one side of the speaker assembly's sound output direction, and the rear cavity is located on the opposite side. One or more sound guiding channels are provided on the housing. Each sound guiding channel is located on the side wall of the housing. Each sound guiding channel connects the air inside the user's ear canal with the air outside the ear canal when the earphone is worn normally, without connecting the air in the front cavity with the air in the rear cavity. By using the above solution, the sound guiding channels in the housing connect the environment inside the ear canal with the environment outside the ear canal, allowing the sound pressure inside the ear canal to be exposed or discharged to the surrounding environment outside the earphone. Reducing the pressure inside the ear canal improves the user's sound experience.

Description

[0001] This application claims priority to Chinese Patent Application No. 202010900041.1, filed on August 31, 2020, entitled "A Headphone and a Mobile Terminal", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to an earphone and a mobile terminal. Background Technology

[0003] Whether listening to MP3 players while traveling or enjoying a high-fidelity stereo system at home, consumers are increasingly choosing in-ear and semi-in-ear headphones for their auditory enjoyment. Both types of electroacoustic transducer devices feature a relatively thin housing that houses the receiver or driver (earpiece speaker). This thin housing provides user convenience while also offering good sound quality. Semi-in-ear headphones typically fit into the outer ear and slightly above the inner ear canal. While not always completely sealed within the ear canal, sound can leak from the headphones and not reach the ear canal, potentially resulting in less than optimal sound quality for the user. Furthermore, variations in ear shape and size can lead to different amounts of sound leakage, resulting in inconsistent acoustic performance between users and impacting the user experience. Summary of the Invention

[0004] This application provides an earphone and a mobile terminal for improving the acoustic performance of the earphone.

[0005] This application provides an earphone for use in a mobile terminal, used for wireless connection with the mobile terminal. The earphone includes a housing and a speaker assembly. The housing contains a front cavity and a rear cavity separated by the speaker assembly, wherein the front cavity is located on one side of the speaker assembly's sound output direction, and the rear cavity is located on the opposite side. One or more sound guiding channels are provided on the housing, each channel being disposed on the side wall of the housing. Each sound guiding channel, when the earphone is worn normally, connects the air inside the user's ear canal with the air outside the ear canal without connecting the air in the front cavity with the air in the rear cavity. By employing the above solution, the sound guiding channels in the housing connect the environment inside the ear canal with the environment outside the ear canal, allowing the sound pressure inside the ear canal to be exposed or discharged to the surrounding environment outside the earphone. Reducing the pressure inside the ear canal improves the user's sound experience.

[0006] In one specific implementation, at least one of the one or more sound guiding channels is a through hole disposed within the side wall of the housing; the through hole has a first opening and a second opening; the first opening communicates with the air inside the ear canal when the earphone is worn normally; the second opening communicates with the air outside the ear canal when the earphone is worn normally. The through hole within the side wall of the housing directly connects the inside and outside of the ear canal.

[0007] In one specific implementation scheme, the opening area S1 of the first opening and the opening area S2 of the second opening satisfy the following condition: the ratio of S1 to S2 is 0.5 to 2. This ensures a good pressure relief effect.

[0008] In one specific implementation, the opening area S1 of the first opening is equal to the opening area S2 of the second opening. This ensures a good pressure relief effect.

[0009] In one specific implementation scheme, the opening area S1 of the first opening of the through hole is not less than 2 mm. 2 Ensure adequate ventilation.

[0010] In one specific implementation, the first opening and the second opening can be elliptical, trapezoidal, circular, or square. Openings of different shapes can be used.

[0011] In one specific implementation, at least one of the one or more sound guiding channels is a groove disposed on the outer surface of the housing; one end of the groove is open and communicates with the air inside the ear canal when the earphone is worn normally; the other end of the groove is open and communicates with the air outside the ear canal when the earphone is worn normally. The groove connects the inside and outside of the ear canal.

[0012] In one specific implementation, at least one of the one or more sound guiding channels includes a first channel group and a second channel group; wherein, the first channel group includes at least one first channel, which is a groove disposed on the outer surface of the housing; the second channel group includes at least one second channel, which is a through hole disposed in the side wall of the housing; the first channel group and the second channel group are in communication; one port of the combined channel formed by the first channel group and the second channel group is in communication with the air inside the ear canal when the earphone is worn normally; the other end of the port of the combined channel is open and in communication with the air outside the ear canal when the earphone is worn normally. The structure of the combined channel realizes the communication between the inside and outside of the ear canal.

[0013] In one specific implementation scheme, the sound guiding channel can be a straight, curved, serpentine, or tree-branch shaped channel. Different sound guiding channels can be used.

[0014] In one specific implementation, at least one of the one or more sound guiding channels is a conduit disposed within the side wall of the housing; the conduit has a first opening and a second opening; the first opening communicates with the air inside the ear canal when the earphone is worn normally; the second opening communicates with the air outside the ear canal when the earphone is worn normally. The conduit facilitates the flow of air between the ear canal and the outside of the ear canal.

[0015] In one specific implementation, the length of the sound guide channel is not less than 3mm. This ensures that both ends of the sound guide channel are not obstructed by the ear canal.

[0016] In one specific implementation, the housing includes a tip region for insertion into a user's ear canal and a main body region extending outward from the tip region; wherein the main body region and the tip region are located on opposite sides of a locking region; the length direction of the sound guide channel is along the main body region towards the tip region. The locking region is the area where the earphone is secured in the ear. This arrangement facilitates communication between the pressure difference inside and outside the ear canal.

[0017] In one specific implementation, the sound guiding channel can be partially parallel to the user's ear canal, facilitating communication between the pressure difference inside and outside the ear canal.

[0018] In one specific implementation, the device further includes a microphone disposed within the front cavity and a pickup channel connected to the microphone; when the earphone is worn normally, the air in the user's ear canal is connected to the microphone without connecting the air in the front cavity. This can effectively improve the stability of the FR response at the SP of the semi-in-ear earphone, and also effectively improve the correlation between the FR responses of the SP and DRP.

[0019] In one possible implementation, the microphone is disposed on the inner surface of the housing.

[0020] In one specific implementation, one end of the pickup channel is connected to the microphone, and the other end of the pickup channel includes a pickup hole disposed on the surface of the housing facing the ear canal. This facilitates microphone setup.

[0021] In one specific implementation, the pickup hole is disposed in the sound guide channel.

[0022] In one specific implementation, the pickup channel includes a closed pickup tube, one end of which is connected to the microphone, and the other end of which includes a pickup hole. When the earphone is worn normally, the pickup hole communicates with the air in the user's ear canal without communicating with the air in the front cavity.

[0023] In one specific implementation, the housing includes an elastic sleeve, with a portion of at least one of the one or more sound channels disposed within the elastic sleeve.

[0024] In one specific implementation, the headphones further include a processor for compensating for sound based on the microphone's pickup performance. This can effectively improve the sound quality of the semi-in-ear headphones.

[0025] Secondly, a mobile terminal is provided, comprising a main body and the earphones described in any of the above embodiments; wherein the main body and the earphones are connected wirelessly. When employing the above solution, a sound-guiding channel disposed within the housing connects the environment inside the ear canal with the environment outside the ear canal, allowing the sound pressure inside the ear canal to be exposed or discharged to the surrounding environment outside the earphones. Reducing the pressure inside the ear canal improves the user's sound experience. Attached Figure Description

[0026] Figure 1 A structural block diagram of the earphone provided in an embodiment of this application;

[0027] Figure 2 This is a schematic diagram illustrating the application scenario of the headphones provided in the embodiments of this application;

[0028] Figure 3 This is a schematic diagram of the structure of the earphone provided in an embodiment of this application;

[0029] Figure 4 A reference diagram showing the usage status of the headphones provided in an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the structure of another earphone provided in an embodiment of this application;

[0031] Figure 6 This is a schematic diagram of the structure of another earphone provided in an embodiment of this application;

[0032] Figure 7 This is a schematic diagram of the structure of another earphone provided in an embodiment of this application;

[0033] Figure 8 This is a schematic diagram of the structure of another earphone provided in an embodiment of this application;

[0034] Figure 9This is a schematic diagram of the structure of a simulated headphone provided in an embodiment of this application;

[0035] Figure 10 A schematic diagram of the frequency response curve of a conventional headphone provided in an embodiment of this application;

[0036] Figure 11 This is a schematic diagram of the frequency response curve of the headphones provided in an embodiment of this application. Detailed Implementation

[0037] The embodiments of this application will now be described in further detail with reference to the accompanying drawings.

[0038] In this application, headphones are generally classified by shape into in-ear headphones and over-ear headphones. In-ear headphones typically refer to headphones with small driver units that can be worn on the outer ear or inserted into the ear canal. The biggest difference between over-ear headphones and in-ear headphones lies in their size. Over-ear headphones are generally much larger than in-ear headphones and can be categorized into mid-size and full-size headphones based on the size of the earcups. Simply put, the earcups of mid-size headphones do not completely cover the ear, while full-size headphones, also known as "large headphones," can completely cover the ear, achieving better sound isolation.

[0039] Earplugs are further divided into semi-in-ear and in-ear types. Generally, earplugs that can be inserted into the outer ear canal are called in-ear types, while those worn on the outer ear are called semi-in-ear types. In this application, the term "earphone" refers to earplugs.

[0040] The headphones provided in this application embodiment can be of different types. For example, according to the wearing method, they can include neckband headphones or non-neckband headphones; according to the communication method, they can include wired headphones, ordinary Bluetooth wireless headphones, or TWS (True Wireless Stereo) headphones. Regardless of the type of headphones used, they can be applied to the embodiments of this application. In the following embodiments, TWS headphones are used as an example for description.

[0041] As TWS earbuds become increasingly popular, people are demanding higher and higher acoustic performance and comfort from them. TWS earbuds are also divided into in-ear and semi-in-ear types. In-ear earbuds, due to the sealing effect of the ear tips, generally have very little leakage from the ear canal. They also have better response differences between different users and better stability of the SP (Second Path), making them more suitable for feedback / hybrid noise cancellation from an acoustic performance perspective.

[0042] Semi-in-ear headphones offer good acoustic and wearing comfort. However, due to differences in ear shape and size among users, the amount of sound leakage may vary, leading to inconsistent acoustic performance between users. This instability in acoustic response makes filter design difficult in feedback noise cancellation systems. Furthermore, the instability in leakage results in poor correlation between the SP (sound signature) response and DRP (drum reference point) response of feedback noise cancellation, making noise cancellation performance at the DRP unstable and severely impacting the noise cancellation experience. Therefore, this application provides a headphone for improving sound quality. The following detailed description, along with specific figures and embodiments, illustrates this application. It should be understood that this application applies to both in-ear and semi-in-ear headphones, with a particularly noticeable gain for scenarios involving semi-in-ear headphones.

[0043] To facilitate understanding of the headphones provided in the embodiments of this application, the basic structure of the headphones provided in the embodiments of this application will be introduced first.

[0044] Figure 1 A structural block diagram of the headphones provided in this application embodiment is shown to illustrate the various components of the headphones provided in this application embodiment. The headphones provided in this application embodiment include both feedforward noise cancellation and feedback noise cancellation.

[0045] The feedforward noise cancellation method works as follows: A feedforward microphone (FB Mic) 101 picks up ambient noise. After passing through an ADC analog-to-digital converter 102, the digital signal of the noise is sent to a feedforward controller 104. The feedforward controller 104 processes the noise and generates a corresponding control signal, which drives a speaker 108 through a digital-to-analog converter 107 to output the sound signal, generating a secondary sound field 109. The sound generated by the secondary sound field 109 enters the ear 111. The feedforward noise cancellation method processes the signal through the feedforward controller 104, and then superimposes it with the original noise sound wave signal transmitted through the physical path to achieve noise cancellation. The advantage of feedforward active noise control is that the microphone receives pure noise and does not receive the sound emitted by the speaker, so the system is an open loop and will not cause any closed-loop oscillation or howling. Therefore, headphones using feedforward noise cancellation can have their circuitry adjusted independently to achieve the best noise cancellation effect. However, the noise passes through the speaker and is reflected multiple times within the speaker, causing changes in its magnitude and phase. The noise collected by the feedforward microphone 101 will be very different from the noise inside the speaker 108. Furthermore, the external noise is highly directional, making it difficult to use the same circuit to meet the noise reduction requirements for noise from different directions.

[0046] In addition to the aforementioned feedforward noise reduction structure, the feedback noise reduction method also includes a feedback microphone 110. The feedback microphone 110 does not require prior reception of ambient noise; instead, it simultaneously receives noise from its own input and the secondary sound field 109 emitted by the speaker 108. The feedback controller 105 then adjusts the error signal to reduce noise. 106 is a signal source for the SP response; it is a downstream music signal, not picked up by the FB Mic. It is a signal from the circuitry mixed with noise signals picked up and processed by the mic before being output to the speaker. Because it is a feedback system, when the amplifier gain increases to a certain level, the system becomes very unstable, producing high-frequency howling or low-frequency oscillations. To maintain the stability of the control system, the secondary sound field 109 must be as stable as possible; that is, the SP response of the FB Mic needs to be stable and cannot exhibit large fluctuations due to leakage. On the other hand, since the point that truly requires noise reduction is the DRP (Difference Reduction Point), the SP response of the FB Mic must be linearly correlated with the response at the DRP for the algorithm to adapt well.

[0047] Figure 2 This diagram illustrates an application scenario of the headphones provided in this embodiment. The dotted lines represent obscured structures. The user's ear 200 includes an auricle 202, a concha 204, and an ear canal 206. The auricle 202 is the fleshy portion of the outer ear protruding from the side of the head, and the concha 204 is the curved cavity portion of the auricle 202 that leads to the ear canal 206. When worn, the headphones provided in this embodiment rest within the concha 204 of the ear 200 and extend into the curved cavity portion of the ear canal 206.

[0048] Figure 3 A schematic diagram of the headphone 300 is shown. The headphone 300 provided in this embodiment can be functionally divided into a main body structure 301 for insertion into the ear canal, and a tube structure 302 connected to the main body structure 301. The main body structure 301 carries most of the headphone 300's structure, such as speakers or drivers, FB microphones, and other devices. The tube structure 302 extends from the main body structure 301 and can be integrally formed with it. As an optional solution, the tube structure 302 can be designed to include a cable, which may contain wires extending from a power source (not shown) to a speaker assembly, carrying audio signals converted to audio by the driver.

[0049] Example 1

[0050] Based on the above embodiments, Embodiment 1 of this application discloses an earphone 300, including a housing 310. The housing 310 is used to carry components of the earphone 300, such as cables, and the components may include a speaker assembly. The housing 310 includes a front cavity and a rear cavity separated by the speaker assembly. The front cavity is located on one side of the speaker assembly's sound output direction, and the rear cavity is located on the opposite side of the speaker assembly's sound output direction. The structure of the speaker assembly and the front and rear cavities divided by the speaker assembly are a conventional configuration of the earphone 300, and will not be described in detail here.

[0051] The outer surface of the housing 310 has a locking region 312 for fitting into the user's ear canal. It should be understood that, although... Figure 3 The locking area 312 is replaced by a line, but it has a certain width to ensure full contact with the ear canal during wear. The shell 310 is divided into a main body area 311 and a tip area 313 by the locking area 312, with the main body area 311 and the tip area 313 located on either side of the locking area 312. During wear, the main body area 311 is exposed outside the ear canal, while the tip area 313 is located inside the ear canal. As an alternative, the tip area 313 has a tapering structure away from the main body area 311, and its shape allows the tip area 313 to be inserted into the ear canal.

[0052] The housing 310 is provided with a main sound outlet 304, which can be formed within the tip region 313. When the tip region 313 is positioned in the ear canal, the main sound outlet 304 is located in the ear canal and communicates with the front cavity of the housing 310, so that the sound generated by the speaker assembly (in response to the audio signal) can be output to the ear canal.

[0053] As an alternative, the main sound outlet 304 can have any size and dimension suitable for achieving the desired acoustic performance of the headphones 300. For example, the main sound outlet 304 can be different shapes such as elliptical or circular.

[0054] When the earphone 300 is worn into the ear canal, the locking area 312 can make close contact with the ear canal. However, since the shell 310 is generally made of non-flexible or rigid materials (such as plastic), the close contact between the locking area 312 and the ear canal may not be airtight. A gap will form between the locking area 312 and the ear canal, which can allow air to escape. Because different users' ear canals are different, the gap between the locking area 312 and the ear canal will also vary. Furthermore, for the same user, the amount of air leakage will vary each time the earphone 300 is worn due to differences in the force or position applied. Therefore, the air leakage between the locking area 312 and the ear canal is uncontrollable and influenced by many human factors. This difference in air leakage can produce unpleasant experiences for the user. For example, when the speaker assembly inside the earphone 300 sends sound into the ear canal, high sound pressure levels at low frequencies can occur inside the ear canal, creating an unpleasant sound effect for the user. At the same time, since the tip region 313 of the housing 310 extends into the ear canal, it prevents a large amount of air from leaking out from around the tip region 313, resulting in the high sound pressure generated not being released quickly.

[0055] For this reason, see Figure 3 The earphone 300 provided in this application embodiment is provided with one or more sound guiding channels 320. Each sound guiding channel 320 is disposed on the side wall of the housing 310. Each guiding channel 320 is used to connect the air inside the user's ear canal with the air outside the ear canal when the earphone 300 is worn normally, without connecting the air in the front cavity with the air in the rear cavity. It should be understood that the above-mentioned normal wearing refers to the wearing method that enables the normal use of the earphone, such as the wearing method referred to in the existing earphone instruction manual.

[0056] exist Figure 3 The example illustrates two sound guide channels 320, but it should be understood that the one or more sound guide channels 320 provided in the embodiments of this application may be one, two, or more. The configuration of each sound guide channel may be the same or different, and the implementation methods of various sound guide channels can be described below.

[0057] In one embodiment, at least one of the sound guiding channels 320 is a through hole disposed in the housing 310. The through hole is located within the side wall of the housing 310 and extends within the side wall of the housing 310. The two ends of the through hole are a first opening 321 and a second opening 322, respectively. The first opening 321 and the second opening 322 are located on the outer surface of the housing 310 (e.g., on both sides of the engagement area 312), and are used to connect the air inside the ear canal with the air outside the ear canal, thereby enabling the air inside the ear canal to communicate with the air outside the ear canal through the through hole in the side wall. Here, the outer surface of the housing 310 refers to the surface of the housing 310 facing the ear canal.

[0058] For ease of explanation, this embodiment will be described using a single sound guide channel 320 as an example. See also... Figure 3 Taking the sound guiding channel at the bottom of the figure as an example, when the earphone 300 is worn in the user's ear canal, the first opening 321 of the sound guiding channel 320 is located inside the ear canal, and the second opening 322 is located outside the ear canal. The first opening 321 is connected to the air inside the ear canal when the earphone 300 is worn normally; the second opening 322 is connected to the air outside the ear canal when the earphone 300 is worn normally, so that the sound guiding channel 320 directly connects the inside of the user's ear canal with the outside of the ear canal.

[0059] See Figure 4 , Figure 4 A schematic diagram of the headphones in use is shown. When the headphones are worn on the user's ear 200, the sound guide channel 320 extends from the tip area 313 across the locking area 312 and into the outside air. The first opening and the second opening are located inside and outside the ear canal 206, respectively, connecting the user's ear canal 206 to the outside air via the sound guide channel 320. The sound guide channel 320 enables the ventilation of the ear canal 206 and the output of sound from the headphones to the external environment outside the headphones.

[0060] It is understood that in the above-mentioned solution in this application, the through hole inside the shell is equivalent to a "tunnel" located inside the shell, through which the air inside the user's ear canal is connected to the air outside the ear canal.

[0061] As an alternative, the first opening 321 and the second opening 322 are respectively located on the tip area 313 and the main body area 311. When the earphone 300 is worn into the user's ear canal, the first opening 321 is located inside the ear canal and is not blocked by the ear canal; the second opening 322 is located outside the ear canal and is not blocked by the auricle or concha of the ear.

[0062] As an alternative, the sound guiding channel 320 can be divided into two parts: a first channel and a second channel, which are connected. The second channel is located in the main body area 311, and the first channel is located in the tip area 313. When the earphone does not include an elastic sleeve (e.g., a semi-in-ear earphone), the first channel is located within the shell portion within the tip area 313; when the earphone includes an elastic sleeve (e.g., an in-ear earphone), the elastic sleeve is located in the tip area 313. At least one portion of one or more sound guiding channels is located within the elastic sleeve. For example, when the guiding channel 320 is divided into a first channel and a second channel, the first channel may be located within the elastic sleeve, allowing the first opening 321 on the first channel to directly communicate with the space within the ear canal.

[0063] As an optional solution, when setting the sound guiding channel 320, the first opening 321 and the second opening 322 of the sound guiding channel 320 can adopt different area ratios. For example, the opening area S1 of the first opening 321 and the opening area S2 of the second opening 322 can satisfy the following: the ratio of S1 to S2 is 0.5 to 2. Specifically, the opening area S1 of the first opening 321 and the opening area S2 of the second opening 322 can be equal, or the opening area S1 of the first opening 321 can be greater than the opening area S2 of the second opening 322. For example, the opening area S1 of the first opening 321 can be any ratio between 0.5 and 2, such as 0.5, 0.8, 1.1, 1.2, 1.3, 1.4, 1.5, or 2 times the opening area S2 of the second opening 322. When the above ratio is adopted, the air in the ear canal can flow smoothly to the outside of the ear canal.

[0064] In addition, to ensure sufficient gas leakage, the opening area S1 of the first opening 321 of the sound guide channel 320 is not less than 2 mm². 2 For example, the opening area S1 of the first opening 321 can be 2 mm. 2 2.5mm 2 3mm 2 3.5mm 2 4mm 2 Different areas are used to ensure that the sound guide channel 320 has a stable leakage rate.

[0065] As an optional solution, in Figure 3 The first opening 321 and the second opening 322 of the sound guiding channel 320 shown in the example are both elliptical, but it should be understood that... Figure 3 The port shape shown in the example is only one specific example. The first opening 321 and the second opening 322 may also take other shapes, such as circular, elliptical, square, irregular, or other shapes. Furthermore, the shapes of the first opening 321 and the second opening 322 may be the same or different. For example, the first opening 321 and the second opening 322 may both be circular, or the first opening 321 may be circular and the second opening 322 may be elliptical.

[0066] As an optional solution, the sound guide channel 320 can be oriented in different ways, such as straight, curved, serpentine, or branching shapes. However, it should be understood that regardless of the orientation of the sound guide channel 320, it should facilitate gas flow without obstructing it. When the sound guide channel 320 includes a first channel and a second channel, the first and second channels can be straight, curved, serpentine, or branching shapes, respectively. It is only necessary to ensure that the first and second channels are connected.

[0067] To facilitate gas flow, optionally, the length of the sound-conducting channel 320 can be partially parallel to the user's ear canal to facilitate gas leakage within the ear canal. If the length of the sound-conducting channel 320 is parallel to the ear canal, its orientation can change with the ear canal. Furthermore, the cross-sectional shape of the sound-conducting channel 320 can be different, such as elliptical, trapezoidal, circular, square, or irregular shapes. As an optional solution, the sound-conducting channel 320 can be a sound-conducting channel with a constant cross-sectional area, or it can be a sound-conducting channel with a gradually changing cross-sectional area. For example, if the cross-sectional area or shape of the first opening 321 and the second opening 322 are different, the cross-sectional area or shape of the sound-conducting channel 320 can adapt to ensure a smooth transition within the sound-conducting channel 320 from the shape or area of ​​the first opening 321 to the shape or area of ​​the second opening 322.

[0068] As an optional solution, when setting the sound guide channel 320, the length of the sound guide channel 320 is not less than 3mm. The length of the sound guide channel 320 refers to the straight-line distance between the first opening 321 and the second opening 322. That is, in this embodiment, the first opening 321 and the second opening 322 of the sound guide channel 320 should be spaced a certain distance apart to ensure that when the locking area 312 contacts the ear canal, the ear canal will not block the first opening 321, while the second opening 322 can be exposed to the external environment and will not be blocked by other structures of the ear, thus ensuring the unobstructed flow of the sound guide channel 320. For example, the distance between the first opening 321 and the second opening 322 can be different distances such as 3mm, 3.5mm, 4mm, 4.5mm, and 5mm.

[0069] As an optional solution, the first opening 321 and the second opening 322 can be equipped with a protective net. The protective net has a porous structure, which can prevent external impurities from entering the sound guiding channel 320 and ensure the reliability of the sound guiding channel 320.

[0070] As an optional solution, the first opening 321 can be located on the surface of the housing 310 facing the ear canal, facilitating communication between the inside and outside of the ear canal. Gas inside the ear canal can enter the sound guiding channel 320 through the first opening 321. It should be understood that the location of the first opening 321 on the surface of the housing 310 facing the ear canal is merely a specific example of its placement. The first opening 321 provided in this embodiment only needs to be located in a position not obstructed by the ear canal. For example, the first opening 321 can be located in communication with the main sound outlet 304, allowing the airflow from the main sound outlet 304 to directly enter the sound guiding channel 320 through the first opening 321, improving gas leakage. Communication between the first opening 321 and the main sound outlet 304 also prevents the ear canal from blocking the first opening 321, ensuring the stability of airflow leakage in the sound guiding channel 320. Alternatively, the opening direction of the first opening 321 can be the same as the opening direction of the main sound outlet 304, also preventing the ear canal from obstructing the first opening 321.

[0071] As an alternative, when the opening direction of the first opening 321 is the same as the opening direction of the main sound outlet 304, the first opening 321 is formed on the side wall (side wall of the housing 310) around the main sound outlet.

[0072] In this embodiment, the sound guide channel 320, when set, is not affected by the engagement area 312 and the sidewall of the ear canal 206, thus forming a stable airflow channel. Therefore, the sound guide channel 320 can serve as a controlled sound guide port. The size and shape of the sound guide channel 320 can be selected to achieve a satisfactory acoustic effect. Furthermore, since the sound guide channel 320 serves as a controlled sound guide port, it can maintain a consistent effect each time the same user wears the headphones, and also ensure consistent air leakage across different users. This exposes the sound pressure inside the headphones to the external environment, resulting in a stable secondary sound field emitted by the speaker. This facilitates headphone calibration to modify the headphone's acoustic response, improves the consistency of the SP response, and enhances overall headphone listening performance and noise reduction performance.

[0073] Example 2

[0074] Based on the above embodiments, this embodiment introduces another implementation of the sound guiding channel. See [link to documentation]. Figure 5 This is a schematic diagram of another type of earphone provided in an embodiment of this application. Figure 5 Some of the labels in the text can be referenced. Figure 3 The same label in the text. Figure 5The sound guiding channel of the earphone shown is a groove 323, that is, at least one of the one or more sound guiding channels is a groove 323 disposed on the outer surface of the housing 310. One end of the groove 323 is open and communicates with the air inside the ear canal when the earphone 300 is worn normally; the other end of the groove 323 is open and communicates with the air outside the ear canal when the earphone 300 is worn normally. In a specific configuration, the groove 323 is disposed on the outer surface of the housing 310 (the surface of the housing 310 facing the ear canal) and extends from the tip area 313 of the housing 310 to the main body area 311.

[0075] As an alternative, the groove 323 can be a straight groove. It should be understood that the shape of the groove 323 provided in the embodiments of this application is not limited to... Figure 5 The straight groove 323 shown is an example. Grooves of different shapes, such as curved grooves and teardrop-shaped grooves, can also be used.

[0076] When using the groove 323 as a sound guide channel, the groove 323 can be connected to the longer side of the main sound outlet 304, thereby preventing the groove 323 from being blocked by the ear canal and ensuring the stability of the leaked air.

[0077] In Adoption Figure 5 When the groove 323 is used as a sound guiding channel, it can also open up the sound guiding channel between the ear canal and the outside, resulting in a stable improvement in the sound effect of the headphones. Furthermore, it involves the linear correlation between the SP response and DRP response, yielding significant benefits. Additionally, using the groove 323 increases the opening area of ​​the sound guiding channel, preventing it from being blocked by the ear canal. It should be understood that when using the groove 323 as a sound guiding channel, the depth or shape of the groove 323 should ensure that it is not blocked by the portion of the ear that is squeezed into the groove 323 when the headphones are worn in the ear.

[0078] Example 3

[0079] Based on the above embodiments, this embodiment introduces another implementation of the sound guiding channel. See [link to documentation]. Figure 6 This is a schematic diagram of the structure of an earphone provided in an embodiment of this application. Figure 6 Some of the labels in the text can be referenced. Figure 3 The same label in the text. Figure 6The sound guiding channel shown adopts a combination of groove 324 and through hole 325. The through hole 325 and groove 324 are connected to form the sound guiding channel. At least one of the one or more sound guiding channels includes a first channel group and a second channel group. The first channel group includes at least one first channel, such as one, two, or three first channels; wherein the first channel is a groove 324 disposed on the outer surface of the housing. The second channel group includes at least one second channel, such as one, two, or three second channels; wherein the second channel is a through hole 325 disposed in the side wall of the housing. The aforementioned first channel group and second channel group are connected, that is, the groove 324 and the through hole 325 are connected. The opening at one end of the combined channel formed by the first channel group and the second channel group is connected to the air inside the ear canal when the earphone is worn normally; the opening at the other end of the combined channel is connected to the air outside the ear canal when the earphone is worn normally.

[0080] As an alternative, the groove 324 is located in the tip region 313 of the housing 310, while the through hole 325 is located in the main body region of the housing 310. One end of the through hole 325 is open within the sidewall of the groove 324, so that the groove 324 and the through hole 325 form a sound guiding channel. Figure 6 The combination shown can also open up the sound channel between the ear canal and the outside, resulting in a stable improvement in the sound effect of the headphones. Moreover, it involves the linear correlation between the SP response and DRP response, thus obtaining greater benefits. In addition, by using a groove 324 in the tip area 313, the opening area of ​​the first opening is increased, which can ensure that there is still a large opening connecting with the inside of the ear canal when in contact with it.

[0081] Example 4

[0082] Based on the above embodiments, this embodiment introduces another implementation of the sound guiding channel. See [link to documentation]. Figure 10 This is a schematic diagram of the structure of an earphone provided in an embodiment of this application. Figure 7 The part of the headphone label shown can be referenced. Figure 3 The same label in the text. Figure 7The sound channel of the earphone shown is a through-hole containing three ports: a first opening 321, a second opening 322, and a third opening 326. These three openings are interconnected. The second opening 322 is located in the main body area and is positioned outside the ear canal when the earphone is worn by the user. The first opening 321 and the third opening 326 are located in the tip area and can be positioned in different locations. When the earphone is worn by the user, both the first opening 321 and the third opening 326 are located inside the ear canal. With this structure, a stable air passage is provided by the added third opening 326, ensuring stable air leakage when the first opening 321 is blocked.

[0083] When the sound guiding channel has a first opening 321, a second opening 322, and a third opening 326, the sound guiding channel can be shaped like a tree branch. For example, the sound guiding channel can include a first channel, a second channel, and a third channel, with the first opening 321 located in the first channel, the second opening 322 located in the second channel, and the third opening 326 located in the third channel. The first opening 321, the second opening 322, and the third opening 326 are connected through communication between the first channel, the second channel, and the third channel.

[0084] As an alternative, the third opening 326 is connected to the front cavity 314 of the housing 310. When the third opening 326 is connected to the front cavity 314, the sound generated by the speaker assembly can flow directly through the third opening 326 to the second opening 322, thus achieving air leakage. In addition, when the third opening 326 is located in the front cavity 314, it can avoid being blocked by the ear canal, ensuring a stable leakage in the sound guide channel.

[0085] Example 5

[0086] Based on the above embodiments, this embodiment introduces another implementation of the sound guiding channel. See [link to documentation]. Figure 8 The conduit 327 shown, at least one of the one or more sound channels, may be a conduit 327 disposed within the side wall of the housing 310. The number of conduits 327 can be referred to the description of other types of sound channels in the above embodiments, and will not be repeated here.

[0087] The conduit 327 has a first opening 329 and a second opening 328; the first opening 329 communicates with the air inside the ear canal when the earphone is worn normally; the second opening 328 communicates with the air outside the ear canal when the earphone is worn normally. The conduit 327 can be understood as an alternative structure to the through hole in Embodiment 1, and its shape and parameters can be referred to the through hole exemplified in Embodiment 1, which will not be described in detail here.

[0088] It should be understood that when specifically setting up the conduit 327, the conduit 327 may be partially embedded in the housing 310, partially exposed in the housing 310, or completely embedded in the housing 310. No specific limitation is made here.

[0089] As an alternative, the catheter 327 can be made of a soft material or a hard material. Exemplary catheters 327 can be made of materials such as plastic or silicone, or the material of the catheter 327 can be the same as that of the housing 310.

[0090] Example 6

[0091] Based on the headphones exemplified in the above embodiments, let's introduce the sound pickup channel.

[0092] During headphone calibration, the sound from the secondary sound field is received via a feedback microphone as a reference value. This parameter is acquired through a feedback microphone, specifically comprising: a microphone (feedback microphone) disposed within the front cavity, and a pickup channel connected to the microphone; when the headphones are worn normally, the air in the user's ear canal is connected to the microphone without connecting the air in the front cavity. One end of the pickup channel is connected to the microphone, and the other end of the pickup channel includes a pickup hole 305, which is disposed on the surface of the housing 310 facing the ear canal.

[0093] In in-ear headphones, the pickup hole 305 is generally required to be as close as possible to the speaker assembly to obtain a direct SP response. For in-ear headphones, due to the seal of the earphone sleeve, gas leakage in the front cavity is not easy, and the correlation between the SP response and DRP response is generally good. However, for the semi-in-ear headphones provided in this embodiment, due to gas leakage, the linear correlation between the SP response and the response at the DRP directly in front of the speaker becomes very poor. To address this, the headphones provided in this embodiment place the pickup hole 305 on the first side of the housing located in the locking area 312. The first side is the side of the housing relative to the locking area 312 and closer to the ear canal 206. The pickup hole 305 picks up the SP response after leakage, and the SP response at the DRP is also the response after leakage, thereby obtaining a better SP response and DRP response.

[0094] The pickup hole 305 can be positioned in different locations during installation. For example, the pickup hole 305 can be positioned on the outer surface of the housing 310 facing the ear canal. Figure 3As shown, the pickup hole 305 is located in the tip region 313 of the housing 310. When the headphones are worn by the user, the pickup hole 305 should not be obstructed by the ear canal. The pickup hole 305 can be located in different structures within the tip region 313 of the housing 310. For example, the pickup hole 305 can be located on the outer surface of the tip region 313, or it can be located within the sound guide channel, or it can be located in the main sound outlet 304. Furthermore, repositioning the pickup hole 305 to face outwards from the housing 310 can improve the linear correlation between the FB response and DRP response, and also enhance binaural recording performance.

[0095] When the feedback microphone is located inside the housing 310, it can be placed in the tip area 313 of the earphone or elsewhere. For example, the feedback microphone is positioned on the inner surface of the housing 310 to facilitate its placement and data acquisition. When engaged with the pickup hole 305, the pickup surface of the feedback microphone faces the pickup hole 305 and can receive the sound received by the pickup hole 305. The pickup hole 305 can be connected to the microphone in different ways. For example, the pickup hole 305 can be connected to the feedback microphone through the aforementioned pickup channel, or through other tubular structures, thereby improving the sound pickup effect of the feedback microphone. When the earphone's pickup hole 305 is placed in the tip area 313 of the earphone and the pickup surface of the feedback microphone faces the outside of the housing 310, the correlation between the SP response and DRP response can be greatly improved, thereby reducing the noise level at the DRP.

[0096] To facilitate understanding of the linear correlation between the SP response and the DRP response of the headphones provided in this application embodiment, the following simulation descriptions of conventional headphones and the headphones provided in this application embodiment are presented.

[0097] Figure 9 This illustration shows a schematic diagram of the placement of the earphone in the ear canal according to an embodiment of this application. The speaker assembly is located within the housing, and the sound it emits is delivered to the ear canal 206 through the main sound outlet in the front cavity and tip area. The eardrum receives the sound at this point, and a portion of the sound leaks into the outside air through the gap 406 between the earphone and the ear canal 206. This leakage is highly dependent on wearing comfort; the sound guide channel 320 has a fixed leakage amount, unaffected by the tightness of the fit. The structure of a conventional earphone is not shown in this application; however, a conventional earphone can be considered as a comparison. Figure 9 The structure of the earphone shown is without the sound guide channel 320. The detection positions of the conventional earphone and the earphone provided in the embodiment of this application are marked below. Figure 9 The following explanation is provided for the headphones shown.

[0098] Figure 9The first position 402 is the SP response position of a conventional headphone (without a sound guide channel), the second position 403 is the SP response position of the headphone of this application, and the third position 404 is the DRP response position.

[0099] For traditional headphones, without a sound guide channel, the leakage degree between the headphone and the ear varies depending on the tightness of the fit. By observing the SP position response at the first position 402, the DRP position response at the third position 404, and the SP position response at the second position 403, the following results were obtained: Figure 10 The three sets of frequency response curves shown are: the first frequency response curve 501, the second frequency response curve 502, and the third frequency response curve 503. Figure 10 The vertical axis represents sound pressure level (dB), and the horizontal axis represents frequency (Hz). The three frequency response curves represent the frequency response curves of a traditional headphone at three different positions. Figure 10 It can be seen that, without a sound guide channel, the offline characteristics of the three frequency response curves are extremely high, and there is no linear correlation between the three.

[0100] After adding the sound guide channel, the frequency response curves at the three locations were observed again, and the results were as follows: Figure 11 The result. Figure 11 The vertical axis represents sound pressure level (dB), and the horizontal axis represents frequency (Hz). Figure 11 It can be seen that the consistency of the fourth frequency response curve 601 obtained from the first position response is greatly improved, but it is not correlated with the fifth frequency response curve 602 obtained from the third position response. The sixth frequency response curve 603 obtained from the second position response is completely linearly correlated with the fifth frequency response curve 602, and they almost overlap in the low frequency part.

[0101] Furthermore, comparing the fifth frequency response curve 602, the second frequency response curve 502, the third frequency response curve 503, and the sixth frequency response curve 603, it can be seen that the headphones provided in this embodiment significantly reduce the impact of changes in wearing method on the low-frequency response of SP and DRP. That is, the multiplicative disturbance of the SP response caused by leakage is greatly reduced, while improving the frequency response stability when playing music and enhancing the sound quality experience. In addition, the SP position provided in this embodiment improves the linear correlation between the SP and DRP responses, supporting ANC (Active Noise Cancellation) performance, particularly improving ANC performance at the actual experience point of DRP.

[0102] By comparing the above Figure 10 and Figure 11As can be seen from the curves, the headphones provided in this application embodiment can directly connect the sound channels inside the ear canal and the outside world through the sound channel, which has a stable improvement effect on the sound effect of the headphones. Moreover, it involves the linear correlation between SP response and DRP response, thus obtaining greater benefits.

[0103] This application also provides a mobile terminal, which can be a common communicative mobile terminal such as a laptop, tablet, mobile phone, or smart wearable device. The mobile terminal includes a main body and any of the aforementioned earphones. The main body and earphones can be connected wirelessly, such as via Bluetooth. When the earphones adopt the above structure, a sound-guiding channel within the housing connects the environment inside the ear canal with the environment outside the ear canal, allowing the sound pressure inside the ear canal to be exposed or expelled to the surrounding environment outside the earphones. Reducing the pressure inside the ear canal improves the user's sound experience.

[0104] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An earphone, characterized in that, include: Housing and speaker assembly; The housing includes a front cavity and a rear cavity separated by the speaker assembly, wherein the front cavity is located on one side of the sound output direction of the speaker assembly, and the rear cavity is located on the opposite side of the sound output direction of the speaker assembly; The housing is provided with a sound guiding channel, which is located on the side wall of the housing. The sound guiding channel is used to connect the air inside the user's ear canal with the air outside the ear canal when the earphone is worn normally, without connecting the air in the front cavity with the air in the rear cavity. The housing includes a main body area and a tip area. When the earphone is worn normally, the main body area is exposed outside the ear canal, and the tip area is located inside the ear canal. The two ends of the sound guiding channel respectively include a first opening and a second opening. The first opening is located in the tip area, and the second opening is located in the main body area. When the earphone is worn normally, the first opening communicates with the space inside the ear canal, and the second opening communicates with the space outside the ear canal. The sound guiding channel includes at least a first channel and a second channel that are interconnected; the first end of the first channel is connected to the first end of the second channel, the second end of the first channel has the first opening, and the second end of the second channel has the second opening. The first channel is disposed on the outer surface of the side wall of the housing and is a groove structure. The second channel is disposed inside the side wall of the housing and is a through hole structure.

2. The headphones as described in claim 1, characterized in that, The length direction of the sound guide channel is partially parallel to the direction of the user's ear canal; The housing is also provided with a main sound outlet, which is located in the tip area and communicates with the front cavity; the first opening communicates with the main sound outlet, or the first opening is formed on the sidewall around the main sound outlet.

3. The headphones as described in claim 1 or 2, characterized in that, The opening area S1 of the first opening is not less than 2mm. 2 .

4. The headphones as described in claim 3, characterized in that, The opening area S1 of the first opening and the opening area S2 of the second opening satisfy the following: The ratio of S1 to S2 is 0.5 to 2.

5. The headphones as described in claim 1, characterized in that, The sound guiding channel also includes a third channel. The first end of the third channel is connected to the first end of the first channel and the first end of the second channel, respectively. The second end of the third channel has a third opening located in the tip area. When the earphone is worn normally, the third opening is connected to the space inside the ear canal.

6. The headphones as described in claim 5, characterized in that, The third channel is disposed within the side wall of the housing, and the third channel is a through-hole structure; or, The third channel is disposed on the outer surface of the side wall of the housing, and the third channel is a groove structure.

7. The headphones as described in claim 5 or 6, characterized in that, The third opening is connected to the front cavity.

8. The headphones as described in any one of claims 5 to 7, characterized in that, The third opening is connected to the main sound outlet, or the third opening is formed on the sidewall surrounding the main sound outlet.

9. The headphones as described in claim 1, characterized in that, The tip area is provided with an elastic sleeve, and the first channel is disposed on the elastic sleeve.

10. The headphones as described in any one of claims 1 to 9, characterized in that, The length of the sound guide channel is not less than 3mm.

11. The headphones as described in any one of claims 1 to 10, characterized in that, The earphone also includes a microphone, which is disposed in the front cavity and the microphone's pickup surface faces the tip area; A sound pickup channel is provided inside the side wall of the housing. The first end of the sound pickup channel is connected to the sound pickup surface of the microphone. The second end of the sound pickup channel has a sound pickup hole located in the tip area. When the earphone is worn normally, the microphone is in communication with the space inside the ear canal.

12. The headphones as claimed in claim 11, characterized in that, The pickup hole is located on the outer surface of the tip area, or the pickup hole is connected to the main sound outlet, or the pickup hole is located within the sound guide channel.

13. The headphones as described in claim 11 or 12, characterized in that, The pickup channel is a conduit structure or a through-hole structure.

14. The headphones as described in any one of claims 11 to 13, characterized in that, The headphones also include a processor for compensating for sound based on the microphone's pickup performance.

15. A mobile terminal, characterized in that, It includes a body and an earphone as described in any one of claims 1 to 14; wherein the body is communicatively connected to the earphone.

Images