Open audio device, sound field control method and related apparatus

Abstract

This application provides an open-type audio device, a sound field control method, and related apparatus, relating to the field of acoustic technology. The device includes an acoustic cavity and multiple sound emitters, sensing components, and control components fixed within the acoustic cavity. The acoustic cavity has a first sound leakage hole and a second sound leakage hole, used to determine the initial distribution and control direction of the external sound field, respectively. The sensing components are used to acquire the target location of an external person. The control components adjust the driving voltage of the sound emitters according to the target location to adjust the external sound field distribution, ensuring the target location is at the lowest possible sound leakage position. By fixing multiple sound emitters within the acoustic cavity and providing the first and second sound leakage holes, combined with the synergistic effect of the sensing and control components, this application dynamically adjusts the external sound field distribution according to the target location of an external person, significantly reducing sound leakage at the target location, thereby minimizing interference with external personnel and protecting user privacy.

Description

Technical Field

[0001] This application relates to the field of acoustic technology, and in particular to an open audio device, a sound field control method, and related apparatus. Background Technology

[0002] With the continuous development of acoustic technology, open-back audio devices such as headphones are increasingly widely used in daily life. Compared with traditional in-ear and over-ear headphones, open-back headphones, through their design that does not block or cover the ear canal, allow users to enjoy high-quality audio while still maintaining awareness of their surroundings. This design not only improves user comfort but also enhances safety to some extent. However, open-back audio devices also face a common problem: sound leakage. Sound leakage not only disturbs those around the user but also compromises privacy. Therefore, sound leakage limits the application scenarios and user experience of open-back audio devices to some extent.

[0003] In related technologies, open-back audio devices typically employ a single speaker and a fixed acoustic cavity design. While this design can reduce average sound leakage at multiple points outside the ear to some extent, it still poses risks of interference and privacy breaches. Summary of the Invention

[0004] This application provides an open audio device, a sound field control method, and related apparatus to reduce the risks of interference and privacy leakage.

[0005] In a first aspect, embodiments of this application provide an open audio device, including an acoustic cavity, multiple sound emitters, a sensing component, and a control component;

[0006] Each sound-generating element, sensing component, and control component is fixed within an acoustic cavity; the acoustic cavity is provided with a first sound vent hole for determining the initial distribution of the external sound field, and a second sound vent hole for determining the direction of external sound field modulation.

[0007] Sensing components are used to acquire the target location of external personnel;

[0008] The control component is used to adjust the driving voltage of the sound generator according to the target position, so as to adjust the external sound field distribution and make the target position the lowest sound leakage position of the adjusted external sound field.

[0009] In one possible implementation, the acoustic cavity is formed by the combined action of an acoustic front cavity, an acoustic connecting cavity, and an acoustic rear cavity, wherein each sound source is fixed inside the acoustic cavity by being connected to it; a first sound leakage hole is provided on the acoustic connecting cavity; and a second sound leakage hole is provided on the acoustic rear cavity.

[0010] In one possible implementation, the number of second sound vents is one, and the second sound vent is parallel to the first sound vent.

[0011] In one possible implementation, there are multiple second sound vents, and the included angle between adjacent second sound vents is within a set angle range.

[0012] In one possible implementation, the angle range is set between 45 degrees and 135 degrees.

[0013] In one possible implementation, the plurality of sound emitters includes a first sound emitter and a second sound emitter, the first sound emitter being located near the acoustic anterior cavity and the second sound emitter being located near the acoustic rear cavity. The control component is specifically used to: fix the driving voltage of the first sound emitter and adjust the driving voltage of the second sound emitter according to the target position to adjust the external sound field distribution so that the target position is at the lowest sound leakage position of the adjusted external sound field; or, fix the driving voltage of the second sound emitter and adjust the driving voltage of the first sound emitter according to the target position to adjust the external sound field distribution so that the target position is at the lowest sound leakage position of the adjusted external sound field.

[0014] In one possible implementation, the control component is further configured to: adjust the driving voltage of the sound-emitting body according to the target position based on the correspondence between the external sound field distribution and the driving voltage.

[0015] In one possible implementation, the open-back audio device further includes: a storage unit; the storage unit is used to store the correspondence between the external sound field distribution and the driving voltage.

[0016] In a second aspect, embodiments of this application provide a sound field control method, applied to a control component in an open audio device as described in any one of the first aspects, the sound field control method comprising:

[0017] Obtain the target location of external personnel;

[0018] Determine whether the target location is at the lowest sound leakage position in the external sound field;

[0019] If the target position is not at the lowest sound leakage position in the external sound field, the driving voltage of the sound source in the open-back audio device is adjusted according to the target position to adjust the distribution of the external sound field so that the target position is at the lowest sound leakage position in the adjusted external sound field.

[0020] Thirdly, embodiments of this application provide a sound field control device, applied to a control component in an open-type audio device as described in any one of the first aspects, the sound field control device comprising:

[0021] The acquisition module is used to acquire the target location of external personnel;

[0022] The judgment module is used to determine whether the target position is at the lowest sound leakage position in the external sound field;

[0023] The processing module is used to adjust the driving voltage of the sound-emitting body in the open-back audio device according to the target position when the target position is not at the lowest sound leakage position of the external sound field, so as to adjust the distribution of the external sound field and make the target position at the lowest sound leakage position of the adjusted external sound field.

[0024] Fourthly, this application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0025] Memory is used to store instructions executed by the computer;

[0026] A processor for executing computer-executable instructions stored in memory to implement the method described in the second aspect.

[0027] Fifthly, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed, are used to implement the method described in the second aspect.

[0028] In a sixth aspect, this application provides a computer program product, including a computer program that, when executed, implements the method described in the second aspect.

[0029] The open-type audio device, sound field control method, and related apparatus provided in this application include an acoustic cavity, multiple sound emitters, a sensing component, and a control component; wherein each sound emitter, sensing component, and control component is fixedly disposed within the acoustic cavity; the acoustic cavity is provided with a first sound leakage hole for determining the initial distribution of the external sound field, and a second sound leakage hole for determining the direction of external sound field adjustment; the sensing component is used to acquire the target position of an external person; the control component is used to adjust the driving voltage of the sound emitter according to the target position, so as to adjust the external sound field distribution, so that the target position is at the lowest sound leakage position of the adjusted external sound field. This application, by fixing multiple sound emitters within an acoustic cavity and setting a first sound leakage hole for determining the initial distribution of the external sound field and a second sound leakage hole for adjusting the direction of the sound field on the acoustic cavity, combined with the collaborative work of sensing and control components, can dynamically adjust the distribution of the external sound field according to the target position of external personnel. This allows the lowest sound leakage position of the external sound field to change with the external environment, achieving precise control over the sound field distribution. This significantly reduces sound leakage at specific target positions, thereby reducing interference to external personnel and leakage of user privacy, and thus improving the user experience. In addition, because it effectively improves the sound leakage problem, it further expands the application scenarios of open-back audio devices. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0031] Figure 1 A schematic diagram of the acoustic cavity of an open-type audio device in related technologies;

[0032] Figure 2 This is a schematic diagram of the spatial sound leakage distribution of an open-back audio device in related technologies;

[0033] Figure 3 This is a schematic diagram of another spatial sound leakage distribution in open-back audio devices in related technologies;

[0034] Figure 4 A schematic diagram showing the sound leakage distribution at different points in an open-type audio device in related technologies;

[0035] Figure 5 A schematic diagram of an open audio device provided as an exemplary embodiment of this application;

[0036] Figure 6 A schematic diagram of the cavity of an open-type audio device provided as an exemplary embodiment of this application;

[0037] Figure 7 A schematic diagram showing the distribution of the first sound vent on the acoustic connection cavity provided for an exemplary embodiment of this application;

[0038] Figure 8 A schematic diagram of the structure of an open audio device with a single second vent hole provided as an exemplary embodiment of this application;

[0039] Figure 9a A schematic front view of an exemplary embodiment of this application showing how the sound pressure level distribution of the external sound field is adjusted by adjusting the driving voltage of the second sound source;

[0040] Figure 9b A schematic top view of adjusting the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application;

[0041] Figure 9c A schematic side view of adjusting the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application;

[0042] Figure 10 Schematic diagram of in-ear frequency response under different driving voltages provided for exemplary embodiments of this application;

[0043] Figure 11 Schematic diagram of the driving voltage versus sound pressure level of the second sound generator provided in an exemplary embodiment of this application. Figure 1;

[0044] Figure 12 A schematic diagram of the structure of an open audio device with two second vent holes provided as an exemplary embodiment of this application;

[0045] Figure 13a A schematic front view of an exemplary embodiment of this application showing how the sound pressure level distribution of the external sound field is adjusted by adjusting the driving voltage of the second sound source;

[0046] Figure 13b A schematic top view 2 showing the adjustment of the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application;

[0047] Figure 13c A schematic side view 2 showing the adjustment of the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application;

[0048] Figure 14 Schematic diagram of the driving voltage versus sound pressure level of the second sound generator provided in an exemplary embodiment of this application. Figure 2 ;

[0049] Figure 15 A schematic diagram of the structure of an open audio device with three second sound vents provided for an exemplary embodiment of this application;

[0050] Figure 16a A schematic front view of an exemplary embodiment of this application showing how the sound pressure level distribution of the external sound field is adjusted by adjusting the driving voltage of the second sound source;

[0051] Figure 16b A top view diagram 3 showing the adjustment of the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application;

[0052] Figure 16c A schematic side view (3) showing the adjustment of the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application;

[0053] Figure 17 Schematic diagram of the driving voltage versus sound pressure level of the second sound generator provided in an exemplary embodiment of this application. Figure 3 ;

[0054] Figure 18 A schematic diagram of the structure of an open audio device with four second sound vents provided for an exemplary embodiment of this application;

[0055] Figure 19a A schematic front view four showing the adjustment of the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application;

[0056] Figure 19b A top view diagram four showing the adjustment of the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application;

[0057] Figure 19c A schematic side view four illustrating the adjustment of the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application;

[0058] Figure 20 Schematic diagram of the driving voltage versus sound pressure level of the second sound generator provided in an exemplary embodiment of this application. Figure 4 ;

[0059] Figure 21 A schematic diagram of the structure of an open audio device with eight second sound vents provided for an exemplary embodiment of this application;

[0060] Figure 22a A schematic front view of an exemplary embodiment of this application showing how the sound pressure level distribution of the external sound field of both ears is adjusted by adjusting the driving voltage of the second sound source.

[0061] Figure 22b A top view schematic diagram of adjusting the sound pressure level distribution of the external sound field of the two ears by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application;

[0062] Figure 22c A schematic side view of an exemplary embodiment of this application showing how the sound pressure level distribution of the external sound field of the two ears is adjusted by adjusting the driving voltage of the second sound source;

[0063] Figure 23 A schematic diagram illustrating the adjustment of the sound pressure level distribution in the external sound field by adjusting the driving voltage of the first sound-generating body, provided as an exemplary embodiment of this application;

[0064] Figure 24 A schematic flowchart of a sound field control method provided for an exemplary embodiment of this application;

[0065] Figure 25 A schematic diagram of a sound field control device provided for an exemplary embodiment of this application;

[0066] Figure 26 A schematic diagram of the structure of an electronic device provided as an exemplary embodiment of this application.

[0067] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0068] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0069] The terms “first,” “second,” etc., used in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, products, or apparatus.

[0070] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with relevant laws, regulations and standards, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0071] Because sound leakage from open-back audio products can cause interference to outsiders and reveal the content of users' conversations, reducing privacy, it has a significant impact on user comfort. Currently, external sound leakage testing typically uses seven points, such as point A, point B1, point B2, point B3, point B4, point B5, and point C.

[0072] In related technologies, open-back audio devices typically employ a single speaker and a fixed acoustic cavity design. For example, Figure 1 This is a schematic diagram of the acoustic cavity of an open-back audio device in related technologies. For example... Figure 1 (a) and Figure 1 As shown in (b), the acoustic cavity includes a front acoustic cavity, a single sound emitter, and a rear acoustic cavity, with a rear cavity vent hole. Considering that acoustic leakage is determined by the acoustic cavity design of open-back audio devices, theoretically, the spatial distribution of sound leakage is fixed once the structure of the open-back audio device is fixed. However, in practical applications, the distribution of people around the user changes constantly. For example, Figure 2 This is a schematic diagram of the spatial sound leakage distribution of an open-back audio device in related technologies; Figure 3 This is a schematic diagram illustrating another spatial sound leakage distribution in open-back audio devices in related technologies. For example... Figure 2 (a) and Figure 2 As shown in (b), when an outsider is at point B3 (i.e., the lowest point of sound leakage), the risk of interference and privacy breach is relatively low; Figure 2 (c) and Figure 2 As shown in (d), when external personnel are located at points with significant sound leakage, such as point B4 or point B5, there is a greater risk of interference and privacy breaches; Figure 3 (a) and Figure 3 As shown in (b), when the entrance to the ear canal of an external person is located at points A and C, there is a greater risk of interference and privacy breach. For example, Figure 4 This is a schematic diagram showing the sound leakage distribution at different points in an open-back audio device in related technologies. For example... Figure 4 As shown, sound leakage at different points varies with frequency. Therefore, the fixed acoustic cavity design in related technologies can only provide sound leakage prevention in a single direction, which can reduce the average sound leakage at multiple points outside the ear to a certain extent. However, the sound pressure level distribution of the external sound field is fixed. Therefore, if the external person is located at the position of maximum sound leakage, it will cause significant interference to the external person and also compromise the privacy of users of open audio devices.

[0073] To address the aforementioned issues, this application provides an open-back audio device that employs multiple speakers and combines acoustic cavity design with acoustic signal control to regulate spatial sound leakage. This allows the device to dynamically adjust the distribution of the external sound field based on the target location of external personnel when they are around the user, ensuring that the user's location is always at the lowest possible sound leakage position. This significantly reduces sound leakage at specific target locations, thereby minimizing interference with external personnel and protecting user privacy.

[0074] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0075] Figure 5 A schematic diagram of an open audio device provided for an exemplary embodiment of this application. For example... Figure 5 As shown, the open-type audio device 50 includes: an acoustic cavity 51, multiple sound emitters 52, a sensing component 53, and a control component 54;

[0076] Each of the sound-generating element 52, the sensing component 53, and the control component 54 is fixed inside the acoustic cavity 51. The acoustic cavity 51 is provided with a first sound vent hole for determining the initial distribution of the external sound field, and a second sound vent hole for determining the direction of external sound field control.

[0077] For example, the acoustic cavity 51, as the core structure of the open-back audio device, houses and supports other key components. Its design not only provides physical protection but also optimizes audio performance through acoustic characteristics. The sound generator 52, installed within the acoustic cavity 51, generates audio signals. Its optimized position and angle design ensures optimal sound wave propagation within the cavity. The sensing component 53, also fixed within the acoustic cavity 51, detects external environmental information, particularly the location of external personnel. This component can utilize various sensing technologies, such as infrared or ultrasonic waves, for precise positioning. The control component 54, installed within the acoustic cavity 51, processes sensor data and controls the output of the sound generator 52. By adjusting the driving voltage of the sound generator, the control component can dynamically adjust the external sound field distribution.

[0078] Sensing component 53 is used to acquire the target location of external personnel.

[0079] For example, sensing component 53 may include various types of sensors, such as infrared sensors, ultrasonic sensors, or camera systems, which can detect the location of people in the external environment in real time. Sensing component 53 is fixedly installed at an appropriate location within the acoustic cavity to ensure it can cover the target area around the open-back audio device. Accordingly, during user operation of the open-back audio device, sensing component 53 continuously scans the environment around the open-back audio device to identify and locate external personnel. By analyzing sensor data, sensing component 53 can determine the location and distance of the personnel and transmit the collected location information to control component 54 for processing in real time.

[0080] The control component 54 is used to adjust the driving voltage of the sound generator according to the target position, so as to adjust the external sound field distribution and make the target position the lowest sound leakage position of the adjusted external sound field.

[0081] It should be noted that the control component 54 of this application can take many forms, including hardware devices such as processors, chips or chip systems, or logic modules or software capable of realizing all or part of the open audio device control functions, which are not limited here.

[0082] Correspondingly, the control component 54 receives and analyzes the target location information provided by the sensing component 53 to determine the location and distance of the external person; based on the analysis results, it determines the driving voltage parameters, thereby adjusting the driving voltage of the sound generator 52. This adjustment can change the directionality and intensity of the sound wave, so that the target position is at the lowest sound leakage position in the external sound field after adjustment; by precisely controlling the driving voltage of the sound generator, the control component 54 can dynamically optimize the distribution of the external sound field and minimize sound leakage at the location of the external person.

[0083] The open-back audio device provided in this application embodiment, by fixing multiple sound emitters within an acoustic cavity and setting a first sound leakage hole for determining the initial distribution of the external sound field and a second sound leakage hole for adjusting the direction of the sound field on the acoustic cavity, combined with the collaborative work of sensing components and control components, can dynamically adjust the distribution of the external sound field according to the target position of external personnel, so that the lowest sound leakage position of the external sound field changes with the external environment, achieving precise control of the sound field distribution, significantly reducing sound leakage at specific target positions, thereby reducing interference to external personnel and leakage of user privacy, and thus improving the user experience; in addition, since it can effectively improve the sound leakage problem, it further expands the application scenarios of open-back audio devices.

[0084] In some embodiments, the acoustic cavity is formed by the combined action of an acoustic front cavity, an acoustic connecting cavity, and an acoustic rear cavity, wherein each sound source is fixed inside the acoustic cavity by being connected to it; a first sound leakage hole is provided on the acoustic connecting cavity; and a second sound leakage hole is provided on the acoustic rear cavity.

[0085] The acoustic front cavity is the front end of the entire acoustic cavity, directly connected to the user's ear canal, responsible for transmitting sound waves into the user's ear canal and ensuring clear audio signal transmission. The acoustic connection cavity is located between the acoustic front cavity and the acoustic rear cavity, serving as a connection and sound wave conduction mechanism. This cavity is equipped with a first vent hole, used to determine the initial distribution of the external sound field. By adjusting the size and position of the first vent hole, the initial propagation path of the sound waves can be affected. The acoustic rear cavity is the rear end of the acoustic cavity, responsible for further regulating the directionality and intensity of the sound waves. The acoustic rear cavity is equipped with a second vent hole, used to regulate the direction of the external sound field. The design of the second vent hole allows the sound field to be dynamically adjusted according to the external environment and needs. Each sound generator is fixed in the acoustic cavity through its connection with the acoustic cavity, and by optimizing the installation position of the sound generator, it can be ensured that it works effectively with the acoustic cavity to achieve optimal sound field control.

[0086] Based on the above embodiments, in some embodiments, the multiple sound emitters include a first sound emitter and a second sound emitter. The first sound emitter is close to the acoustic front cavity, and the second sound emitter is close to the acoustic rear cavity. The control component is specifically used to: fix the driving voltage of the first sound emitter, and adjust the driving voltage of the second sound emitter according to the target position, so as to adjust the external sound field distribution, so that the target position is at the lowest sound leakage position of the adjusted external sound field.

[0087] For example, Figure 6 A schematic diagram of the cavity structure of an open-type audio device provided as an exemplary embodiment of this application. Figure 6 As shown in (a), the cavity of an open-back audio device consists of an acoustic front cavity, an acoustic connecting cavity, a first sound source, a second sound source, and an acoustic rear cavity; wherein the diaphragm positions of the first and second sound sources are as follows. Figure 6 As shown in (b) of the diagram.

[0088] It should be noted that the size and design of the first and second sound generators can be the same or different. In practical applications, the size and design of the first and second sound generators can be changed according to the driving voltage requirements. Here, there are no restrictions on the size and design of the first and second sound generators.

[0089] For example, Figure 7 A schematic diagram showing the distribution of the first sound leakage hole on the acoustic connection cavity provided in an exemplary embodiment of this application. (See diagram below.) Figure 7 (a) and Figure 7 As shown in (b) of the diagram, the acoustic connection cavity has two first sound vents, with an included angle of 90 degrees between them. It should be noted that... Figure 7 The distribution of the first sound leakage holes on the acoustic connection cavity shown is only an illustration. The number of first sound leakage holes on the acoustic connection cavity can be single or multiple, and the included angle between adjacent first sound leakage holes can be 90 degrees or within a preset angle range. Here, there is no limitation on the number of first sound leakage holes on the acoustic connection cavity or the included angle between adjacent first sound leakage holes.

[0090] Accordingly, in some embodiments where the number and orientation of the first sound vent holes on the acoustic connection cavity are fixed, the number of the second sound vent holes is single, and the second sound vent hole is parallel to the first sound vent hole.

[0091] For example, Figure 8 A schematic diagram of the structure of an open-type audio device with a single second vent hole, provided as an exemplary embodiment of this application. Figure 8 As shown, there is only one second sound vent, and this second sound vent is parallel to one of the first sound vents on the acoustic connection cavity. Correspondingly, Figure 9aA schematic front view of an exemplary embodiment of this application showing how the sound pressure level distribution of the external sound field is adjusted by adjusting the driving voltage of the second sound source; Figure 9b A schematic top view of adjusting the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application; Figure 9c A schematic side view of adjusting the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application; Figure 10 A schematic diagram of the in-ear frequency response under different driving voltages provided for an exemplary embodiment of this application. For example... Figure 9a , Figure 9b and Figure 9c As shown, the external sound field begins to rotate under different driving voltages. With the driving voltage of the first sound source fixed, as the driving voltage of the second sound source increases, the lowest sound leakage position begins to shift (e.g., shifting backward and upward); as... Figure 10 As shown, the frequency response in the ear increases with the increase of the driving voltage of the second sound source.

[0092] Accordingly, the sound pressure levels at different external test points (low frequency 20Hz-100Hz) were averaged, and the driving voltage versus sound pressure level curve of the second sound source was plotted as follows: Figure 11 As shown. Figure 11 As shown, the sound leakage at points A and C decreases as the voltage increases, while the sound leakage at point B3 reaches its minimum at 0.1V and then gradually increases. The sound leakage at other points also increases with increasing voltage. Therefore, the external sound field can be adjusted by using a single second vent hole and adjusting the driving voltage, with the adjustment primarily focused on points A and C.

[0093] In this embodiment of the application, by combining a single second sound leakage hole with driving voltage adjustment, dynamic adjustment of the external sound field can be achieved, which can reduce sound leakage at some points, thereby reducing interference to external personnel and leakage of user privacy at some points.

[0094] In some embodiments, there are multiple second sound vents, and the included angle between adjacent second sound vents is within a set angle range.

[0095] For example, Figure 12 A schematic diagram of an open-type audio device with two second vent holes, provided as an exemplary embodiment of this application. Figure 12 As shown, in Figure 8 Based on a single second sound vent, a second sound vent is added, with the included angle between the two second sound vents within a set range, for example, 90 degrees. Correspondingly, Figure 13a A schematic front view of an exemplary embodiment of this application showing how the sound pressure level distribution of the external sound field is adjusted by adjusting the driving voltage of the second sound source; Figure 13b A schematic top view 2 showing the adjustment of the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application; Figure 13c A schematic side view, provided as an exemplary embodiment of this application, illustrates how adjusting the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound-emitting element. (See diagram 2.) Figure 13a , Figure 13b and Figure 13c As shown, the two second vent holes have no effect on the initial external sound field (i.e., the state where the driving voltage of the second sound source is zero). However, as the driving voltage of the second sound source increases, they significantly change the sound pressure level distribution trend of the external sound field. The curves of sound pressure level at each test point in the external sound field as a function of driving voltage are shown below. Figure 14 As shown. Figure 14 As shown, as the driving voltage increases, the lowest sound leakage position changes from point B3 to point B5, and then to point B1. Based on the trend, it can be inferred that the next lowest sound leakage position is point B2, and the frequency response in the ear also increases with the increase of the driving voltage.

[0096] Accordingly, Figure 15 A schematic diagram of the structure of an open-type audio device with three second sound vents provided for an exemplary embodiment of this application. Figure 15 As shown, in Figure 12 Based on the two second sound vents, a third second sound vent is added. The angle between the newly added second sound vent and the adjacent second sound vent is within a set angle range, for example, 90 degrees between the newly added second sound vent and the adjacent second sound vent. Correspondingly, Figure 16a A schematic front view of an exemplary embodiment of this application showing how the sound pressure level distribution of the external sound field is adjusted by adjusting the driving voltage of the second sound source; Figure 16b A top view diagram 3 showing the adjustment of the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application; Figure 16c A schematic side view (3) illustrating the adjustment of the sound pressure level distribution in the external sound field by adjusting the driving voltage of the second sound-emitting element, as provided in an exemplary embodiment of this application. Figure 16a , Figure 16b and Figure 16c As shown, the three second vent holes have no effect on the initial external sound field (i.e., the state where the driving voltage of the second sound source is zero). However, as the driving voltage of the second sound source increases, they significantly change the sound pressure level distribution trend of the external sound field. The curves of sound pressure level at each test point in the external sound field as a function of driving voltage are shown below. Figure 17 As shown. Figure 17 As shown, as the driving voltage increases, the lowest leakage position changes from point B3 to point B4, then to point B2, and then to point A. The frequency response in the ear also increases with the increase of the driving voltage.

[0097] Furthermore, Figure 18 A schematic diagram of the structure of an open-type audio device with four second vent holes provided for an exemplary embodiment of this application. Figure 18 As shown, in Figure 15 Based on the three second sound vents, a third second sound vent is added. The angle between the newly added second sound vent and the adjacent second sound vent is within a set angle range, for example, 90 degrees between the newly added second sound vent and the adjacent second sound vent. Correspondingly, Figure 19a A schematic front view four showing the adjustment of the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application; Figure 19b A top view diagram four showing the adjustment of the sound pressure level distribution of the external sound field by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application; Figure 19c A schematic side view four illustrating the adjustment of the sound pressure level distribution in the external sound field by adjusting the driving voltage of the second sound-emitting element, as provided in an exemplary embodiment of this application. Figure 19a , Figure 19b and Figure 19c As shown, the four second vent holes have no effect on the initial external sound field (i.e., the state where the driving voltage of the second sound source is zero). However, as the driving voltage of the second sound source increases, they significantly change the sound pressure level distribution trend of the external sound field. The curves of sound pressure level at each test point in the external sound field as a function of driving voltage are shown below. Figure 20 As shown. Figure 20 As shown, as the driving voltage increases, the lowest sound leakage position changes from point B3 to point B2, and then to point A. Based on the trend, it can be inferred that the next lowest sound leakage position is point C, and the frequency response in the ear also increases with the increase of the driving voltage.

[0098] It should be noted that the above examples of two, three, and four second sound vents are merely illustrations. In actual applications, the number of second sound vents can be set according to the actual situation. No limitations are placed here on the number, size, or shape of the second sound vents. For example, Figure 21 A schematic diagram of an open-type audio device with eight second vent holes, provided as an exemplary embodiment of this application. Figure 21 As shown, eight second sound vents are evenly distributed on the acoustic rear cavity, and the included angle between adjacent second sound vents is 45 degrees.

[0099] In this embodiment, by setting different numbers and orientations of second sound leakage holes, the driving voltage of the second sound emitter can be adjusted to control the external sound field. It can switch the lowest sound leakage position according to the target position of the external person, so that the target position is at the lowest sound leakage position of the adjusted external sound field, which can significantly reduce the sound leakage at a specific target position, thereby reducing interference to external people and leakage of user privacy.

[0100] The above examples mainly illustrate the simulation results for monoaural actuation; the following are the simulation results for binaural actuation. For example, using... Figure 8 Taking the structure of an open-type audio device with a single second vent hole as an example, Figure 22a A schematic front view of an exemplary embodiment of this application showing how the sound pressure level distribution of the external sound field of both ears is adjusted by adjusting the driving voltage of the second sound source. Figure 22b A top view schematic diagram of adjusting the sound pressure level distribution of the external sound field of the two ears by adjusting the driving voltage of the second sound source, provided as an exemplary embodiment of this application; Figure 22c This is a side view schematic diagram illustrating the adjustment of the sound pressure level distribution in the external sound field of both ears by adjusting the driving voltage of the second sound-emitting element, as provided in an exemplary embodiment of this application. Figure 22a , Figure 22b and Figure 22c As shown, the external sound field begins to rotate under different driving voltages. With the driving voltage of the first sound source fixed, as the driving voltage of the second sound source increases, the lowest sound leakage position begins to shift (e.g., shifting behind the ear and upwards). This can be observed through comparison. Figure 9a , Figure 9b and Figure 9c The corresponding monoaural simulation results show that the simulation results for binaural are consistent with those for monoaural.

[0101] The above example fixes the driving voltage of the first sound source and controls the driving voltage of the second sound source to achieve the effect of controlling the external sound field. In practical applications, the driving voltages of both the first and second sound sources can be adjusted to expand the control range of the sound field. For example, such as... Figure 10 As shown in the in-ear frequency response curves under different driving voltages, the in-ear frequency response gradually increases with the increase of the driving voltage of the second sound source. In fact, the in-ear frequency response can be kept constant by reducing the driving voltage of the first sound source. Therefore, in some embodiments, the control component is also used to: fix the driving voltage of the second sound source and adjust the driving voltage of the first sound source according to the target position to adjust the external sound field distribution so that the target position is at the lowest sound leakage position of the adjusted external sound field.

[0102] For example, with Figure 8 Taking the structure of an open-type audio device with a single second vent hole as an example, Figure 23 This is a schematic diagram illustrating the adjustment of the sound pressure level distribution in the external sound field by adjusting the driving voltage of the first sound-emitting element, as provided in an exemplary embodiment of this application. Figure 23 (a) in the diagram is the front view. Figure 23 (b) in the diagram is a side view. For example... Figure 23 (a) and Figure 23As shown in (b), the external sound field begins to rotate under different driving voltages. With the driving voltage of the second sound source fixed, as the driving voltage of the first sound source increases, the lowest sound leakage position begins to shift (e.g., shifting in front of the ear and upward).

[0103] In some embodiments, the set angle range is between 45 degrees and 135 degrees.

[0104] Specifically, the included angle between adjacent second vent holes can be set to 90 degrees, but it can also be adjusted within the range of 45 degrees to 135 degrees. For example, as Figure 12 As shown, the included angle between the two second sound vents can be 45 degrees, 60 degrees, 120 degrees or 135 degrees, etc.

[0105] This application embodiment provides a relatively wide range of setting angles, which can better adapt to different physical structures and user needs. This flexibility enables the device to adapt to a variety of usage scenarios, thereby further improving the overall performance and user experience of open audio devices.

[0106] In some embodiments, the control component is also used to: adjust the driving voltage of the sound-emitting body according to the target position based on the correspondence between the external sound field distribution and the driving voltage.

[0107] For example, during the use of an open-back audio device, the sensing component continuously scans the environment around the device to identify and locate external personnel, determining their location information, such as orientation and distance, by collecting data. This location information is then transmitted to the control component in real time. The control component receives and analyzes the target location information provided by the sensing component to determine the orientation and distance of the external personnel. Furthermore, using a built-in algorithm, it analyzes whether the external personnel are at the lowest leakage position in the current external sound field. When the external personnel are not at the lowest leakage position, a suitable driving voltage parameter is selected from the built-in correspondence between the external sound field distribution and the driving voltage. The selected driving voltage parameter is then applied to the sound source to adjust the external sound field distribution, ensuring the external personnel are at the lowest leakage position.

[0108] Based on the above embodiments, in some embodiments, the open-back audio device further includes: a storage unit; the storage unit is used to store the correspondence between the external sound field distribution and the driving voltage.

[0109] For example, during the production or initialization phase of an open-back audio device, the pre-determined correspondence between the external sound field distribution and the driving voltage is stored in a storage unit. During device operation, the control component retrieves the corresponding sound field distribution and driving voltage correspondence from the storage unit based on the target location of an external person obtained by a sensor. The control component then uses the retrieved data to adjust the driving voltage of the sound-emitting body to achieve dynamic optimization of the external sound field. Optionally, in some embodiments, the open-back audio device can also use machine learning algorithms to dynamically update the data in the storage unit based on user habits and environmental changes to further improve the accuracy and effectiveness of sound field control.

[0110] In this embodiment, by pre-storing the correspondence between the external sound field distribution and the driving voltage in the storage unit, the control component can quickly retrieve and apply the most suitable driving voltage for the current target position. This precise sound field control ensures that external personnel are in the position with the lowest sound leakage, effectively reducing audio leakage and thus enhancing the protection of user privacy, especially in public places or environments requiring confidentiality. In addition, the use of the storage unit reduces the complexity of real-time calculation and can respond quickly when the user's position changes, dynamically adjusting the driving voltage of the sound-emitting body. This rapid adjustment capability improves the adaptability of the device in various environments, while enabling open-back audio devices to optimize energy consumption while ensuring sound quality, thereby improving battery efficiency.

[0111] Figure 24 This is a schematic flowchart illustrating a sound field control method provided for an exemplary embodiment of this application. The sound field control method provided in this embodiment is applied to the control component of the open audio device described in the above embodiments. Figure 24 As shown, the sound field control method includes:

[0112] S241. Obtain the target location of external personnel.

[0113] For example, during the use of an open-back audio device, the sensing component continuously scans the environment around the open-back audio device to identify and locate external personnel, and determines the personnel's location information, such as orientation and distance, by collecting data; and transmits the collected location information to the control component in real time; the control component receives and analyzes the target location information provided by the sensing component to determine the orientation and distance of the external personnel.

[0114] S242. Determine whether the target location is at the lowest sound leakage position in the external sound field.

[0115] For example, using a built-in algorithm, it analyzes whether an external person is at the lowest sound leakage position in the current external sound field.

[0116] If so, execute S241;

[0117] If not, proceed to S243.

[0118] S243. If the target position is not at the lowest sound leakage position of the external sound field, adjust the driving voltage of the sound-emitting body in the open-type audio device according to the target position to adjust the distribution of the external sound field so that the target position is at the lowest sound leakage position of the adjusted external sound field.

[0119] Correspondingly, when an external person is not located at the lowest sound leakage position in the current external sound field, a suitable driving voltage parameter is selected from the built-in correspondence between the external sound field distribution and the driving voltage. The selected driving voltage parameter is applied to the sound source to adjust the external sound field distribution, thereby ensuring that the target position is located at the lowest sound leakage position in the adjusted external sound field. Furthermore, the adjusted lowest sound leakage position is fed back into the judgment mechanism through a feedback loop as the basis for the next judgment.

[0120] In this embodiment of the application, the distribution of the external sound field can be continuously optimized through this dynamic adjustment mechanism to ensure that the target position is always at the lowest sound leakage position. This not only improves the privacy protection capability of open audio devices and reduces interference to external personnel, but also enhances the stability and consistency of the user experience.

[0121] In summary, this application has at least the following advantages:

[0122] First, by fixing multiple sound emitters within the acoustic cavity and setting a first sound leakage hole to determine the initial distribution of the external sound field and a second sound leakage hole to adjust the direction of the sound field, combined with the collaborative work of sensing and control components, the distribution of the external sound field can be dynamically adjusted according to the target position of external personnel. This allows the lowest sound leakage position of the external sound field to change with the external environment, achieving precise control over the sound field distribution. This significantly reduces sound leakage at specific target positions, thereby reducing interference with external personnel and leakage of user privacy, and thus improving the user experience. In addition, because it effectively improves the sound leakage problem, it further expands the application scenarios of open-back audio devices.

[0123] Second, by setting different numbers and orientations of second sound leakage holes, the driving voltage of the second sound source can be adjusted to control the external sound field. It can switch the lowest sound leakage position according to the target position of the external person, so that the target position is at the lowest sound leakage position of the external sound field after adjustment. This can significantly reduce the sound leakage at a specific target position, thereby reducing interference to external people and leakage of user privacy.

[0124] Third, by pre-storing the correspondence between the external sound field distribution and the driving voltage in the storage unit, the control component can quickly retrieve and apply the most suitable driving voltage for the current target position. This precise sound field control ensures that external personnel are in the position with the lowest sound leakage, effectively reducing audio leakage and thus enhancing the protection of user privacy, especially in public places or environments requiring confidentiality. In addition, the use of the storage unit reduces the complexity of real-time calculations and can respond quickly when the user's position changes, dynamically adjusting the driving voltage of the sound source. This rapid adjustment capability improves the device's adaptability to various environments, while enabling open-back audio devices to optimize energy consumption while ensuring sound quality, thereby improving battery efficiency.

[0125] Figure 25 This is a schematic diagram of a sound field control device provided as an exemplary embodiment of this application. The sound field control device provided in this embodiment is applied to the control components of the open-type audio device described in the above embodiments. Figure 25 As shown, the sound field control device 250 includes an acquisition module 251, a judgment module 252, and a processing module 253, wherein:

[0126] Module 251 is used to acquire the target location of external personnel;

[0127] The judgment module 252 is used to determine whether the target position is at the lowest sound leakage position in the external sound field;

[0128] The processing module 253 is used to adjust the driving voltage of the sound-emitting body in the open-back audio device according to the target position when the target position is not at the lowest sound leakage position of the external sound field, so as to adjust the distribution of the external sound field and make the target position at the lowest sound leakage position of the adjusted external sound field.

[0129] The sound field control device provided in this application embodiment can execute the technical solution shown in the above sound field control method embodiment. Its implementation principle and beneficial effects are similar, and will not be repeated here.

[0130] It should be noted that the division of the various modules in the above device is merely a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, these modules can be implemented entirely in software via processing element calls; they can be fully implemented in hardware; or some modules can be implemented by processing element calls to software, while others are implemented in hardware. For example, a processing module can be a separate processing element, or it can be integrated into a chip within the device. Alternatively, it can be stored as program code in the device's memory, and its functions can be called and executed by a processing element. The implementation of other modules is similar. Moreover, these modules can be fully or partially integrated together, or they can be implemented independently. The processing element here can be an integrated circuit with signal processing capabilities. During implementation, each step of the above method or each of the above modules can be completed through integrated logic circuits in the hardware of the processor element or through software instructions.

[0131] For example, these modules can be one or more integrated circuits configured to implement the above methods, such as one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs). As another example, when a module is implemented using processing element scheduler code, the processing element can be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. Furthermore, these modules can be integrated together as a System-On-a-Chip (SOC).

[0132] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., Digital Video Discs, DVDs), or semiconductor media (e.g., solid-state disks (SSDs)).

[0133] Figure 26 A schematic diagram of the structure of an electronic device provided as an exemplary embodiment of this application. For example... Figure 26 As shown, the electronic device 260 of this embodiment includes:

[0134] At least one processor 261; and a memory 262 communicatively connected to said at least one processor;

[0135] The memory 262 stores instructions that can be executed by the at least one processor 261 to cause the electronic device to perform the method as described in any of the above embodiments.

[0136] Alternatively, the memory 262 can be either standalone or integrated with the processor 261.

[0137] The memory 262 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as at least one disk storage device.

[0138] Processor 261 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application. Specifically, when implementing the sound field control method described in the foregoing method embodiments, the electronic device may be, for example, an electronic device with processing capabilities such as a server.

[0139] Optionally, the electronic device may also include a communication interface 263. In specific implementations, if the communication interface 263, memory 262, and processor 261 are implemented independently, they can be interconnected via a bus to complete communication. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc., but this does not imply that there is only one bus or one type of bus.

[0140] Optionally, in a specific implementation, if the communication interface 263, memory 262 and processor 261 are integrated on a single chip, then the communication interface 263, memory 262 and processor 261 can communicate through an internal interface.

[0141] The implementation principle and technical effects of the electronic device provided in this embodiment can be found in the foregoing embodiments, and will not be repeated here.

[0142] This application also provides a computer-readable storage medium storing computer-executable instructions. When the computer-executable instructions are executed, they are used to implement the method steps as described in the above method embodiments. The specific implementation methods and technical effects are similar and will not be repeated here.

[0143] The aforementioned computer-readable storage media can be implemented from any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0144] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an application-specific integrated circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in a sound field control device.

[0145] This application also provides a computer program product, including a computer program that, when executed, implements the method steps as described in the above method embodiments. The specific implementation and technical effects are similar and will not be repeated here.

[0146] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0147] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An open-type audio device, characterized in that, Includes acoustic cavity, multiple sound emitters, sensing components, and control components; Each of the sound-generating body, the sensing component, and the control component is fixedly disposed within the acoustic cavity; the acoustic cavity is provided with a first sound vent for determining the initial distribution of the external sound field, and a second sound vent for determining the direction of external sound field modulation. The sensing component is used to collect the target location of external personnel; The control component is used to adjust the driving voltage of the sound-emitting body according to the target position, so as to adjust the external sound field distribution and make the target position the lowest sound leakage position of the adjusted external sound field.

2. The open-back audio device according to claim 1, characterized in that, The acoustic cavity is formed by the combined action of an acoustic front cavity, an acoustic connecting cavity, and an acoustic rear cavity. Each sound-emitting body is fixed inside the acoustic cavity by being connected to it. The acoustic connecting cavity is provided with the first sound leakage hole, and the acoustic rear cavity is provided with the second sound leakage hole.

3. The open-back audio device according to claim 1 or 2, characterized in that, The number of second sound vents is one, and the second sound vent is parallel to the first sound vent.

4. The sound output device according to claim 1 or 2, characterized in that, There are multiple second sound leakage holes, and the included angle between adjacent second sound leakage holes is within a set angle range.

5. The open-back audio device according to claim 4, characterized in that, The set angle range is between 45 degrees and 135 degrees.

6. The open-back audio device according to claim 2, characterized in that, The plurality of sound-emitting bodies includes a first sound-emitting body and a second sound-emitting body, the first sound-emitting body being located near the acoustic front cavity, and the second sound-emitting body being located near the acoustic rear cavity. The control component is specifically used for: The driving voltage of the first sound source is fixed, and the driving voltage of the second sound source is adjusted according to the target position to adjust the external sound field distribution so that the target position is at the lowest sound leakage position of the adjusted external sound field. Alternatively, the driving voltage of the second sound source is fixed, and the driving voltage of the first sound source is adjusted according to the target position to adjust the external sound field distribution so that the target position is at the lowest sound leakage position of the adjusted external sound field.

7. The open-back audio device according to claim 6, characterized in that, The control component is also used to: adjust the driving voltage of the sound-emitting body according to the target position based on the correspondence between the external sound field distribution and the driving voltage.

8. The open-back audio device according to claim 7, characterized in that, Also includes: Storage unit; The storage unit is used to store the correspondence between the external sound field distribution and the driving voltage.

9. A sound field control method, characterized in that, The sound field control method, applied to a control component in any one of claims 1 to 8, comprises: Obtain the target location of external personnel; Determine whether the target location is at the lowest sound leakage position in the external sound field; If the target position is not at the lowest sound leakage position of the external sound field, the driving voltage of the sound-emitting body in the open-back audio device is adjusted according to the target position to adjust the distribution of the external sound field, so that the target position is at the lowest sound leakage position of the adjusted external sound field.

10. A sound field control device, characterized in that, A control component applied in any one of claims 1 to 8, the sound field control device comprising: The acquisition module is used to acquire the target location of external personnel; The judgment module is used to determine whether the target position is located at the lowest sound leakage position in the external sound field; The processing module is used to adjust the driving voltage of the sound-emitting body in the open-back audio device according to the target position when the target position is not at the lowest sound leakage position of the external sound field, so as to adjust the distribution of the external sound field and make the target position at the lowest sound leakage position of the adjusted external sound field.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed, are used to implement the method as described in claim 9.

12. A computer program product, comprising a computer program, characterized in that, When the computer program is executed, it implements the method as described in claim 9.

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