Acoustic cavity structure, method and device for determining acoustic cavity structure

Abstract

The present application provides an acoustic cavity structure, a method and device for determining the acoustic cavity structure, which are applied to the technical field of audio equipment. The acoustic cavity structure includes: an acoustic front cavity and an acoustic rear cavity; the acoustic rear cavity is provided with at least one sound leakage hole; the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to a first angle range; the opening angle of the first sound leakage hole is the angle required for the reference axis of the wearing position to rotate in a preset direction to the line connecting the first sound leakage hole and the center of gravity of the acoustic rear cavity. The acoustic cavity structure of the present application can enhance the sound leakage prevention effect of open wearable audio equipment.

Description

Technical Field

[0001] The present application relates to the technical field of audio equipment, and in particular to an acoustic cavity structure, and a method and device for determining the acoustic cavity structure. Background Art

[0002] When users use open wearable audio devices, they can hear the audio played by the open wearable audio devices and the ambient sound, which is suitable for use in scenarios where attention needs to be paid to the surrounding environment. However, open wearable audio devices are prone to sound leakage, which may cause nearby people to hear the audio the user is listening to. The user's privacy is not guaranteed and it also affects nearby people.

[0003] In the related art, sound insulation materials are set on open wearable audio devices to absorb and reflect sound waves to reduce sound leakage. However, this method does not fundamentally solve the sound leakage problem, resulting in a weak anti-sound leakage effect. Summary of the invention

[0004] Based on this, it is necessary to provide an acoustic cavity structure, a method and device for determining the acoustic cavity structure to address the above-mentioned technical problems, which can improve the sound leakage prevention effect of open wearable audio devices.

[0005] In a first aspect, the present application provides an acoustic cavity structure, comprising: an acoustic front cavity and an acoustic rear cavity; at least one sound leakage hole is opened on the acoustic rear cavity; the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to a first angle range; the first angle range is a range of 45 degrees to 135 degrees; the opening angle of the first sound leakage hole is the angle required for the wearing position reference axis to rotate in a preset direction to the line connecting the first sound leakage hole and the center of gravity of the acoustic rear cavity.

[0006] In the second aspect, the present application provides an open wearable audio device, comprising: a wearing structure and a sound-emitting unit, the wearing structure being connected to the sound-emitting unit; the sound-emitting unit comprising a sound-emitting monomer and an acoustic cavity structure; the acoustic cavity structure is the acoustic cavity structure of the first aspect.

[0007] In a third aspect, the present application provides a method for determining an acoustic cavity structure, comprising: determining, when an open wearable audio device adopts a preset structure, in-ear frequency response data received by a first object and leakage sound response data received by a second object through a leakage sound test scenario model; the leakage sound test scenario model is obtained by simulating a scenario in which the first object uses the open wearable audio device to play audio, and testing the impact on the second object; selecting an acoustic cavity structure from the preset structure based on the in-ear frequency response data and the leakage sound response data;

[0008] An acoustic cavity structure includes an acoustic front cavity and an acoustic rear cavity; at least one sound leakage hole is opened on the acoustic rear cavity; the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to a first angle range; the first angle range is a range of 45 degrees to 135 degrees; the opening angle of the first sound leakage hole is the angle required for the wearing position reference axis to rotate in a preset direction to the line connecting the first sound leakage hole and the center of gravity of the acoustic rear cavity.

[0009] In a fourth aspect, the present application provides a device for determining an acoustic cavity structure, comprising:

[0010] A simulation test module, for determining, when the open wearable audio device adopts a preset structure, in-ear frequency response data received by the first object and leakage sound response data received by the second object through a leakage sound test scenario model; the leakage sound test scenario model is obtained by simulating a scenario in which the first object uses the open wearable audio device to play audio and tests the impact on the second object;

[0011] A structure selection module, used to select an acoustic cavity structure from a preset structure based on the in-ear frequency response data and the leakage sound response data;

[0012] An acoustic cavity structure includes an acoustic front cavity and an acoustic rear cavity; at least one sound leakage hole is opened on the acoustic rear cavity; the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to a first angle range; the first angle range is a range of 45 degrees to 135 degrees; the opening angle of the first sound leakage hole is the angle required for the wearing position reference axis to rotate in a preset direction to the line connecting the first sound leakage hole and the center of gravity of the acoustic rear cavity.

[0013] In a fifth aspect, the present application also provides a computer device, the computer comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer execution instructions; and the above method is implemented when the processor executes the computer execution instructions stored in the memory.

[0014] In a sixth aspect, the present application also provides a computer-readable storage medium, in which computer-readable storage medium is stored computer-executable instructions, and the computer-executable instructions are used to implement the above method when executed by a processor.

[0015] In a seventh aspect, the present application also provides a computer program product, comprising computer execution instructions, which implement the above method when executed by a processor.

[0016] The present application provides an acoustic cavity structure, a method for determining the acoustic cavity structure, and a device, wherein the acoustic cavity structure includes an acoustic front cavity and an acoustic back cavity; at least one sound leakage hole is opened on the acoustic back cavity; the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to a first angle range; the first angle range is a range of 45 degrees to 135 degrees; the opening angle of the first sound leakage hole is the angle required for the reference axis of the wearing position to rotate in a preset direction to the line connecting the first sound leakage hole and the center of gravity of the acoustic back cavity; since sound leakage is caused by the acoustic cavity structure itself, the sound leakage holes on the acoustic back cavity are limited, that is, the opening angle of the first sound leakage hole is limited to belong to the first angle range, and the first angle range is a range of 45 degrees to 135 degrees; the sound leakage problem is fundamentally solved, and the sound leakage can be reduced while ensuring the frequency response quality in the ear, thereby improving the sound leakage prevention effect of the acoustic cavity structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of an application scenario of a method for determining an acoustic cavity structure provided in an embodiment;

[0019] Figure 2 A flow chart of a method for determining an acoustic cavity structure provided in an embodiment Figure 1 ;

[0020] Figure 3 A schematic diagram of a preset structure in an embodiment;

[0021] Figure 4 is a schematic diagram of an acoustic cavity structure in a wearing position in one embodiment;

[0022] Figure 5 is a schematic diagram of a reference axis of a wearing position in one embodiment;

[0023] Figure 6 is a schematic diagram of multiple test points in one embodiment;

[0024] Figure 7 is a curve diagram showing the importance of frequency to speech intelligibility in one embodiment;

[0025] Figure 8 is a schematic diagram of multiple preset acoustic back cavities when the number of sound leakage holes is one in one embodiment;

[0026] Fig. 9 In one embodiment, Figure 8 Schematic diagram of the frequency response data corresponding to the structure shown;

[0027] Fig.10 Schematic diagram of multiple preset acoustic back cavities when the number of sound leakage holes is two in one embodiment Figure 1 ;

[0028] Fig.11 In one embodiment, Fig.10 Schematic diagram of the frequency response data corresponding to the structure shown;

[0029] Fig.12 Schematic diagram of multiple preset acoustic back cavities when the number of sound leakage holes is two in one embodiment Figure 2 ;

[0030] Fig.13 In one embodiment, Fig.12 Schematic diagram of the frequency response data corresponding to the structure shown;

[0031] Fig.14 is a schematic diagram of multiple preset acoustic back cavities when the number of sound leakage holes is three in one embodiment;

[0032] Fig.15 In one embodiment, Fig.14 Schematic diagram of the frequency response data corresponding to the structure shown;

[0033] Fig.16 is a schematic diagram of multiple preset acoustic back cavities when the number of sound leakage holes is four in one embodiment;

[0034] Fig.17 In one embodiment, Fig.16 Schematic diagram of the frequency response data corresponding to the structure shown;

[0035] Fig.18 1 is a schematic diagram of the external sound field distribution corresponding to Case 1-1 when the acoustic back cavity is preset in one embodiment;

[0036] Fig.19 is a schematic diagram of the structure of a target acoustic back cavity selected in one embodiment;

[0037] Fig. 20 In one embodiment Fig.19 Schematic diagram of the frequency response data corresponding to the structure shown;

[0038] Fig.21 In one embodiment Fig.19 A schematic diagram of the frequency response curve in the ear corresponding to the structure shown;

[0039] Fig. 22 In one embodiment Fig.19A schematic diagram of the center leakage frequency response curve corresponding to the structure shown;

[0040] Fig.23 In one embodiment Fig.19 A schematic diagram of the average leakage frequency response curve corresponding to the structure shown;

[0041] Fig.24 In one embodiment Fig.19 Schematic diagram of the external sound field distribution corresponding to the structure shown at 100 Hz;

[0042] Fig.25 In one embodiment Fig.19 Schematic diagram of the external sound field distribution corresponding to the structure shown at 1000Hz;

[0043] Fig.26 In one embodiment Fig.19 Schematic diagram of the external sound field distribution corresponding to the structure shown at 2000Hz;

[0044] Fig. 27 In one embodiment Fig.19 Schematic diagram of the external sound field distribution corresponding to the structure shown at 3150Hz;

[0045] Fig.28 In one embodiment Fig.19 Schematic diagram of the external sound field distribution corresponding to the structure shown at 3150Hz;

[0046] Fig.29 In one embodiment, the average sound leakage response curve of the preset acoustic back cavity Case-1-1 in the actual sound leakage test scenario and the simulated sound leakage test scenario;

[0047] Fig.30 In one embodiment, the preset acoustic back cavity Case:3-3 is the in-ear frequency response curve in the actual sound leakage test scenario and the simulated sound leakage test scenario;

[0048] Fig.31 In one embodiment, the average sound leakage response curve of the preset acoustic back cavity Case:3-3 in the actual sound leakage test scenario and the simulated sound leakage test scenario;

[0049] Fig.32 A flow chart of a method for determining an acoustic cavity structure provided in an embodiment Figure 2 ;

[0050] Fig.33 A schematic diagram of the structure of a device for determining an acoustic cavity structure provided in one embodiment;

[0051] Fig.34 A schematic diagram of an acoustic cavity structure provided in an embodiment Figure 1;

[0052] Fig.35 A schematic diagram of an acoustic cavity structure provided in an embodiment Figure 2 ;

[0053] Fig.36 A schematic diagram of an acoustic cavity structure provided in an embodiment Figure 3 ;

[0054] Fig.37 A hardware structure diagram of a computer device provided in one embodiment.

[0055] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0056] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0057] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0058] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0060] The method for determining the acoustic cavity structure provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown, the terminal 102 communicates with the server 104 through a network. The data storage system can store data that the server 104 needs to process. The data storage system can be integrated on the server 104, or placed on the cloud or other network servers.

[0061] The terminal 102 may be, but is not limited to, various personal computers, laptops, smart phones, tablet computers, IoT devices, and portable wearable devices. The IoT devices may be smart speakers, smart TVs, smart air conditioners, smart car-mounted devices, etc. The portable wearable devices may be smart watches, smart bracelets, head-mounted devices, etc. The server 104 may be implemented as an independent server or a server cluster consisting of multiple servers.

[0062] In some embodiments, Figure 2 As shown, a method for determining an acoustic cavity structure is provided, and the method is applied to a computer device as an example for explanation. The computer device may be Figure 1 The terminal or server in the embodiment of the present invention comprises:

[0063] S202. When the open wearable audio device adopts a preset structure, determine the in-ear frequency response data received by the first object and the leakage sound response data received by the second object through a leakage sound test scenario model; the leakage sound test scenario model is obtained by simulating a scenario in which the first object uses the open wearable audio device to play audio and tests the impact on the second object.

[0064] Among them, open wearable audio devices are wearable audio devices with open design. Open design refers to a design that does not block the ear canal and does not completely cover the auricle. Open wearable audio devices may include but are not limited to: open headphones, smart audio glasses and virtual reality head-mounted display devices.

[0065] The preset structure includes an acoustic front cavity and a preset acoustic back cavity, such as Figure 3 As shown, the sound unit is arranged in a cavity formed by an acoustic front cavity and a preset acoustic rear cavity, and a sound leakage hole can be opened on the preset acoustic rear cavity; the number and opening angle of the sound leakage holes will affect the sound leakage of the open wearable audio device.

[0066] There can be multiple preset structures, and different preset structures have at least one difference in the number of sound leakage holes or the opening angles of the sound leakage holes; for example, the preset structure A1 has one sound leakage hole, and the opening angle of the sound leakage hole is d1; the preset structure A2 has one sound leakage hole, and the opening angle of the sound leakage hole is d2; the preset structure A3 has two sound leakage holes, one of which has an opening angle of d3, and the other has an opening angle of d4.

[0067] The sound leakage test scenario model is obtained by simulating a sound leakage test scenario. The sound leakage test scenario is a scenario in which the influence of sound leakage of an open wearable audio device on a second object is tested when the first object uses the open wearable audio device to play audio. It should be noted that the first object uses the open wearable audio device to play audio, which means that the audio is played when the first object is wearing the open wearable audio device.

[0068] Frequency response data is data that describes how loudness changes with frequency; in-ear frequency response data is frequency response data in the ear of the first subject; leakage sound response data is frequency response data in the ear of the second subject; it should be noted that when the first subject uses an open wearable audio device to play audio, due to sound leakage from the open wearable audio device, the sound wave signal corresponding to the played audio is propagated into the scene, and the frequency response data in the ear of the second subject is called leakage sound response data.

[0069] In some embodiments, before S202, it also includes: constructing a sound leakage test scenario model, the sound leakage test scenario model including: an air domain, a device simulation model of an open wearable audio device in the air domain, a first object simulation model of a first object, and a second object simulation model of a second object; and the first object simulation model and the device simulation model constitute a corresponding coupling model when the first object uses the open wearable audio device.

[0070] For each preset structure, when the open wearable audio device adopts the preset structure, a device simulation model corresponding to the preset structure is constructed. When a sound leakage test is performed on the preset structure, the device simulation model corresponding to the preset structure is used in the sound leakage test scenario model; it can be understood that when the open wearable audio device adopts the preset structure, the sound leakage test scenario model includes the device simulation model corresponding to the preset structure.

[0071] Specifically, when an open wearable audio device adopts a preset structure, a simulation test is performed using a sound leakage test scenario model that includes a device simulation model corresponding to the preset structure. The simulation test includes: playing audio through the device simulation model corresponding to the preset structure, so that the sound wave signal corresponding to the audio propagates in the air domain of the sound leakage test scenario model, obtaining in-ear frequency response data through an in-ear test on a first artificial head, and obtaining leakage sound response data through an in-ear test on a second artificial head.

[0072] S204. Select an acoustic cavity structure from a preset structure based on the in-ear frequency response data and the leakage sound response data; the acoustic cavity structure includes an acoustic front cavity and an acoustic back cavity; at least one sound leakage hole is opened on the acoustic back cavity; the at least one sound leakage hole includes a first sound leakage hole; the angle difference between the opening angle of the first sound leakage hole and the angle corresponding to the horizontal axis of the wearing position belongs to the first angle range; the first angle range is the range of 45 degrees to 135 degrees; the opening angle of the first sound leakage hole is the angle between the line between the first sound leakage hole and the center of gravity of the acoustic back cavity and the reference axis of the wearing position; the angle corresponding to the horizontal axis of the wearing position is the angle between the horizontal axis of the wearing position and the reference axis of the wearing position.

[0073] There are multiple preset structures, and the acoustic cavity structure can be at least one of the multiple preset structures.

[0074] Specifically, the computer device obtains in-ear frequency response data and leakage sound response data corresponding to multiple preset structures, and selects an acoustic cavity structure so that the in-ear frequency response data of the acoustic cavity structure is larger and the leakage sound response data is smaller.

[0075] In an optional manner, the preset structure includes a preset acoustic back cavity, and the computer device can select a larger in-ear frequency response data from the in-ear frequency response data corresponding to the multiple preset acoustic back cavities, so as to screen out a plurality of candidate acoustic back cavities (preset structures corresponding to the larger in-ear frequency response data) from the multiple preset acoustic back cavities, and select a smaller leakage sound response data from the leakage sound response data corresponding to the multiple candidate acoustic back cavities; wherein, the larger in-ear frequency response data is selected from the in-ear frequency response data corresponding to the multiple preset acoustic back cavities, and a first preset number of larger in-ear frequency response data can be selected from the in-ear frequency response data corresponding to the multiple preset acoustic back cavities. In-ear frequency response data, the first preset number of larger in-ear frequency response data are all larger than the in-ear frequency response data that are not selected; similarly, selecting smaller leakage sound response data from the leakage sound response data corresponding to the plurality of candidate acoustic back cavities can be, from the leakage sound response data corresponding to the plurality of candidate acoustic back cavities, selecting a second preset number of smaller leakage sound response data, taking the candidate acoustic back cavities corresponding to the second preset number of smaller leakage sound response data as the target acoustic back cavity, and obtaining the acoustic cavity structure corresponding to the target acoustic back cavity; the second preset number of smaller leakage sound response data are all smaller than the in-ear frequency response data that are not selected.

[0076] In an optional manner, the computer device may perform normalization processing on the in-ear frequency response data and the leakage sound response data corresponding to a plurality of preset acoustic back cavities, respectively, to obtain normalized in-ear frequency response data and normalized leakage sound response data; for the normalized in-ear frequency response data and the normalized leakage sound response data corresponding to each preset acoustic back cavity, the difference between 1 and the normalized in-ear frequency response data is used as the score of the in-ear frequency response data, the normalized leakage sound response data is used as the score of the leakage sound response data, the scores of the in-ear frequency response data and the scores of the leakage sound response data are weightedly summed to obtain a target score of the preset acoustic back cavity, and a target acoustic back cavity is selected from the plurality of preset acoustic back cavities according to the target score; the target score of the target acoustic back cavity is greater than the target scores of other preset acoustic back cavities that have not been selected; and the acoustic cavity structure corresponding to the target acoustic back cavity is determined.

[0077] In some embodiments, the plurality of preset structures include a plurality of first preset structures, a plurality of second preset structures, a plurality of third preset structures, a plurality of fourth preset structures, and a plurality of fifth preset structures; wherein:

[0078] The plurality of first preset structures each include a sound leakage hole, and the opening angles of the sound leakage hole are different in the plurality of first preset structures.

[0079] The multiple second preset structures all include two sound leakage holes, and the opening angle difference of the two sound leakage holes is the first preset angle in the multiple second preset structures. For the reference sound leakage hole among the two sound leakage holes, the opening angle of the reference sound leakage hole is different in the multiple second preset structures.

[0080] Multiple third preset structures all include two sound leakage holes, and the opening angle difference of the two sound leakage holes is the second preset angle in multiple third preset structures. For the reference sound leakage hole among the two sound leakage holes, the opening angle of the reference sound leakage hole is different in multiple third preset structures.

[0081] Multiple fourth preset structures all include three sound leakage holes, and the relative positions of the three sound leakage holes are the same in multiple fourth preset structures. For a reference sound leakage hole among the three sound leakage holes, the opening angle of the reference sound leakage hole is different in multiple fourth preset structures.

[0082] Multiple fifth preset structures all include four sound leakage holes, and the relative positions of the four sound leakage holes are the same in multiple fifth preset structures. For a reference sound leakage hole among the four sound leakage holes, the opening angle of the reference sound leakage hole is different in multiple fifth preset structures.

[0083] It should be noted that the preset structure includes a sound leakage hole, which means that the acoustic back cavity of the preset structure is provided with a sound leakage hole.

[0084] For each of the above-mentioned multiple preset structures, when the acoustic back cavity is the preset acoustic back cavity, the computer device uses a sound leakage test scenario model to determine the in-ear frequency response data and the leakage sound response data corresponding to the preset structure; according to the in-ear frequency response data and the leakage sound response data respectively corresponding to the above-mentioned multiple preset structures, an acoustic cavity structure with larger in-ear frequency response data and smaller leakage sound response data is selected from the multiple preset structures.

[0085] There can be multiple acoustic cavity structures. The structural characteristics of the acoustic cavity structure can be obtained based on the sound leakage holes and corresponding opening angles of the multiple acoustic cavity structures; specifically, the acoustic cavity structure includes an acoustic back cavity, on which at least one sound leakage hole is opened, and the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to a first angle range; the first angle range is a range of 45 degrees to 135 degrees; the opening angle of the first sound leakage hole is the angle required for the wearing position reference axis to rotate in a preset direction to the line connecting the first sound leakage hole and the center of gravity of the acoustic back cavity.

[0086] Among them, when the open wearable audio device is correctly worn on the human ear, the open wearable audio device is in the wearing position, that is, the acoustic cavity structure is in the wearing position. At this time, the wearing position reference axis is the axis pointing to the height direction of the center of gravity of the acoustic back cavity, and the preset direction is the clockwise direction.

[0087] The first angle interval includes 90 degrees, and the first angle interval may be 90 degrees±45 degrees.

[0088] Figure 4 This is a schematic diagram of the acoustic cavity structure in the wearing position when the open wearable audio device is worn on the human ear, and the arrow points to the direction of the reference axis of the wearing position. Figure 5 As shown, the wearing position reference axis is the axis indicated by the arrow, and the opening angle of the sound leakage hole is 0 degrees.

[0089] In the above-mentioned method for determining the structure of the acoustic cavity, a sound leakage test scenario model is used to simulate a scenario in which a first object uses an open-type wearable audio device to test the impact of sound leakage on a second object, and when the open-type wearable audio device adopts a preset structure, the sound leakage test scenario model is used to determine the in-ear frequency response data received by the first object and the leakage sound response data received by the second object; the sound leakage test scenario model is close to the actual application scenario, so the in-ear frequency response data and the leakage sound response data can reflect the frequency response data in the actual application scenario, thereby improving the quality of the measured in-ear frequency response data and the leakage sound response data, and through simulation testing, the in-ear frequency response data and the leakage sound response data under each preset structure can be quickly obtained, thereby improving the efficiency of determining the structure of the acoustic cavity; by By comparing the in-ear frequency response data and the leakage sound response data under the preset structure, an acoustic cavity structure is selected, and the selected acoustic cavity structure includes an acoustic front cavity and an acoustic rear cavity. At least one sound leakage hole is opened on the acoustic rear cavity, and the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to the first angle range; the first angle range is the range of 45 degrees to 135 degrees; since sound leakage is caused by the acoustic cavity structure, determining the acoustic cavity structure can fundamentally reduce sound leakage and improve the simulated sound leakage effect of open wearable audio devices; in addition, the acoustic cavity structure is selected by combining the in-ear frequency response data and the leakage sound response data, which can reduce sound leakage while ensuring the in-ear frequency response quality of the open wearable audio device, thereby improving the overall quality of the open wearable audio device.

[0090] In some embodiments, the sound leakage test scene model also includes a first object simulation model and a second object simulation model; the method also includes: determining multiple test points according to the position of the ear canal entrance of the first object simulation model; the leakage sound response data includes central leakage sound response data and average leakage sound response data; determining the in-ear frequency response data received by the first object and the leakage sound response data received by the second object through the leakage sound test scene model, including: determining the in-ear frequency response data received by the first object through the leakage sound test scene model, and when the ear canal entrance of the second object simulation model is respectively at multiple test points, determining the leakage sound response sub-data corresponding to the multiple test points received by the second object; obtaining the central leakage sound response data from the leakage sound response sub-data corresponding to the multiple test points; and determining the average leakage sound response data according to the leakage sound response sub-data corresponding to the multiple test points.

[0091] Among them, the multiple test points include multiple first test points and multiple second test points; based on the ear canal entrance position of the first object simulation model, the multiple test points are determined, including: a hemispherical surface facing the outside of the body with the ear canal entrance position of the first object simulation model as the center and the first distance as the radius; multiple first test points on the hemispherical surface with the same height as the ear canal entrance position; a reference test point is selected from the multiple first test points; multiple second test points are determined on the hemispherical surface with the distance between them and the reference test point being the second distance; the heights of the multiple second test points are different from each other.

[0092] For example, Figure 6 It is a three-dimensional schematic diagram, front view, top view and side view of multiple test points determined according to the first object simulation model; the ear canal entrance position of the first object simulation model is point O, and multiple first test points can be determined: B1, B2, B3, B4 and B5, among which the reference test point is B3, and the second test points include: A and C; among which B3 is the center of all test points, so B3 is used as the central test point; the first distance and the second distance can be set according to actual needs, and the embodiment of the present application is not limited to this.

[0093] Specifically, for each test point, when the entrance of the ear canal of the second object is at the test point, audio is played through the device simulation model corresponding to the preset structure, and the in-ear frequency response data received by the first object is determined through the leakage sound test scene model, and the leakage sound response data corresponding to the test point received by the second object is determined; when the entrance of the ear canal of the second object simulation model is at the central test point, the leakage sound response data corresponding to the central test point determined is used as the central leakage sound response data; the leakage sound response data corresponding to multiple test points are averaged to obtain average leakage sound response data.

[0094] In the above embodiment, the multiple test points are points where the second object may be located in an actual application scenario. Testing the leakage sound response data at the multiple test points makes the leakage sound test close to the actual application scenario, thereby improving the quality of the measured leakage sound response data.

[0095] In some embodiments, the audio is audio at multiple preset frequencies; the multiple preset frequencies include frequencies belonging to a low frequency band and frequencies belonging to a mid-frequency band; the leakage audio response data includes center leakage audio response data and average leakage audio response data; the in-ear frequency response data includes low-frequency in-ear frequency response data and mid-frequency in-ear frequency response data; the center leakage audio response data includes: low-frequency center leakage audio response data and mid-frequency center leakage audio response data; the average leakage audio response data includes: low-frequency average leakage audio response data and mid-frequency average leakage audio response data.

[0096] Specifically, audio at multiple preset frequencies is played through a device simulation model corresponding to the preset structure, and the in-ear frequency response sub-data at multiple preset frequencies received by the first object is determined through the leakage sound test scenario model, and the leakage audio response data at multiple preset frequencies received by the second object is determined; the leakage audio response data at multiple preset frequencies includes center leakage audio response data and average leakage audio response data at multiple preset frequencies.

[0097] According to the in-ear frequency response sub-data at multiple preset frequencies, low-frequency in-ear frequency response data and medium-frequency in-ear frequency response data are determined; according to the center leakage audio response data at multiple preset frequencies, low-frequency center leakage audio response data and medium-frequency center leakage audio response data are determined; according to the center leakage audio response data at multiple preset frequencies, low-frequency average leakage audio response data and medium-frequency average leakage audio response data are determined.

[0098] The plurality of preset frequencies include a plurality of first preset frequencies belonging to a low frequency band and a plurality of second preset frequencies belonging to a medium frequency band; illustratively, the low frequency band is 20 Hz -1 kHz, and the first preset frequency may be any frequency in 20 Hz -1 kHz.

[0099] The plurality of second preset frequencies belonging to the middle frequency band include a plurality of set frequencies and frequencies inserted between two adjacent set frequencies; wherein the plurality of set frequencies are frequencies that have a greater impact on speech clarity.

[0100] The mid-frequency band is 1kHz-20kHz; according to the frequency importance function, multiple set frequencies that have a greater impact on speech clarity can be determined. Figure 7 It is a curve that shows the importance (weight) of frequency to speech intelligibility; Figure 7 It can be seen that the cumulative weight of the mid-frequency band is greater than 50%. Therefore, the center frequency of the mid-frequency band is used as the frequency that has a greater impact on speech clarity. The multiple set frequencies are: 1000Hz, 1250Hz, 1600Hz, 2000Hz, 2500Hz and 3150Hz; the octave is used to insert multiple frequencies between two adjacent set frequencies. The results obtained by using 1 / 3 octave, 1 / 6 octave and 1 / 12 octave are not much different. Therefore, 1 / 3 octave, 1 / 6 octave or 1 / 12 octave can be used to insert multiple frequencies between two adjacent set frequencies.

[0101] Specifically, the in-ear frequency response data at multiple first preset frequencies are averaged to obtain low-frequency in-ear frequency response data; the in-ear frequency response data at multiple second preset frequencies are averaged to obtain medium-frequency in-ear frequency response data. In the same way, low-frequency center leakage sound response data, medium-frequency center leakage sound response data, low-frequency average leakage sound response data, and medium-frequency average leakage sound response data can be determined.

[0102] In the above embodiment, the audio is audio at different preset frequencies, and the in-ear frequency response data and leakage sound response data at low and medium frequencies can be obtained, so that the acoustic cavity structure can be selected based on the in-ear frequency response data and leakage sound response data at low and medium frequencies. The in-ear frequency response and sound leakage at low and medium frequencies are comprehensively considered, thereby improving the quality of the acoustic cavity structure.

[0103] In some embodiments, the preset structure includes a preset acoustic back cavity; based on the in-ear frequency response data and the leakage sound response data, selecting the acoustic cavity structure from the preset structure, including: grouping the preset acoustic back cavity according to the number of sound leakage holes to obtain multiple structure groups; multiple preset acoustic back cavities belonging to the same structure group have the same number of sound leakage holes and different opening angles; for each structure group, based on the in-ear frequency response data and the leakage sound response data corresponding to the multiple preset acoustic back cavities in the targeted structure group, selecting a candidate acoustic back cavity from the targeted structure group; based on the in-ear frequency response data and the leakage sound response data corresponding to the candidate acoustic back cavities selected from the multiple structure groups, selecting a target acoustic back cavity from the selected candidate acoustic back cavity, and determining the acoustic cavity structure corresponding to the target acoustic back cavity.

[0104] Specifically, for each structure group, a reference acoustic back cavity is selected from multiple preset acoustic back cavities of the structure group; the reference acoustic back cavity includes a sound leakage hole opened at a preset angle; according to the in-ear frequency response data of the reference acoustic back cavity and the in-ear frequency response data of other preset acoustic back cavities in the multiple preset acoustic back cavities, a first preset acoustic back cavity is selected from other preset acoustic back cavities; the in-ear frequency response data of the first preset acoustic back cavity is greater than the in-ear frequency response data of other preset acoustic back cavities that are not selected; according to the leakage sound response data of the reference acoustic back cavity and the leakage sound response data of the first preset acoustic back cavity, a candidate acoustic back cavity is selected from the first preset acoustic back cavity; the leakage sound response data of the candidate acoustic back cavity is less than the leakage sound response data of the first preset acoustic back cavity.

[0105] Among them, the in-ear frequency response data includes: low-frequency in-ear frequency response data and medium-frequency in-ear frequency response data; the leakage audio response data includes: low-frequency center leakage audio response data, medium-frequency center leakage audio response data, low-frequency average leakage audio response data and medium-frequency average leakage audio response data.

[0106] The number of sound leakage holes includes: one, two, three and four, and a first structure group corresponding to one sound leakage hole, a second structure group corresponding to two sound leakage holes, a fourth structure group corresponding to three sound leakage holes and a fifth structure group corresponding to four sound leakage holes can be obtained.

[0107] When the number of sound leakage holes is one, Figure 8In the first structure group shown, in the multiple preset acoustic back cavities of the first structure group, the opening angles of a sound leakage hole are respectively: 0 degrees (case1-1), 45 degrees (case1-2), 90 degrees (case1-3), 135 degrees (case1-4), 180 degrees (case1-5), 225 degrees (case1-6), 270 degrees (case1-7) and 315 degrees (case1-8); wherein the reference acoustic back cavity is a sound leakage hole with an opening angle of 0 degrees (case1-1).

[0108] Fig. 9 The low-frequency in-ear frequency response data (in-ear SPL of 20-1000Hz), mid-frequency in-ear frequency response data (in-ear SPL of 1000-3150Hz), low-frequency center leakage sound response data (B3 leakage of 20-1000Hz), mid-frequency center leakage sound response data (B3 leakage of 1000-3150Hz), low-frequency average leakage sound response data (average external leakage sound of 20-1000Hz) and mid-frequency average leakage sound response data (average external leakage sound of 1000-3150Hz) corresponding to each preset acoustic back cavity in the first structure group are shown; the increase and decrease of the mid-frequency response data of case1-2 to case1-8 are all obtained by comparison with case1-1; according to Fig. 9 From the data shown, it can be seen that the in-ear frequency response data of Case 1-1 and Case 1-2 are similar to the reference acoustic back cavity of the first structure group, and the leakage sound response data is good, so they can be selected as candidate acoustic back cavities.

[0109] The second structure group includes a preset acoustic back cavity with two sound leakage holes; the second structure group is divided into a first group and a second group according to the angle difference between the two sound leakage holes, in the first group, the angle difference between the two sound leakage holes is 180 degrees, and in the second group, the angle difference between the two sound leakage holes is 90 degrees. The two sound leakage holes include a first sound leakage hole and a second sound leakage hole.

[0110] like Fig.10 As shown, in the multiple preset acoustic back cavities included in the first group, the opening angles of the first sound leakage hole are respectively: 0 degree (case2-1), 45 degrees (case2-2), 90 degrees (case2-3), and 135 degrees (case2-4); since the angle difference between the first sound leakage hole and the second sound leakage hole is 180 degrees, the opening angle of the second sound leakage hole is no longer repeated; wherein, the reference acoustic back cavity is case2-1.

[0111] Fig.11The low-frequency in-ear frequency response data (in-ear SPL of 20-1000Hz), mid-frequency in-ear frequency response data (in-ear SPL of 1000-3150Hz), low-frequency center leakage sound response data (B3 leakage of 20-1000Hz), mid-frequency center leakage sound response data (B3 leakage of 1000-3150Hz), low-frequency average leakage sound response data (average external leakage sound of 20-1000Hz) and mid-frequency average leakage sound response data (average external leakage sound of 1000-3150Hz) corresponding to each preset acoustic back cavity in the first group are shown; the increase and decrease of the mid-frequency response data from case2-2 to case2-4 are all obtained by comparison with case2-1; according to Fig.11 From the data shown, it can be seen that Case 2-3 has larger in-ear frequency response data and better leakage sound response data, and can be selected as a candidate acoustic back cavity.

[0112] like Fig.12 As shown, in the multiple preset acoustic back cavities included in the second group, the opening angles of the first sound leakage hole are: 0 degree (case3-1), 45 degrees (case3-2), 90 degrees (case3-3), 135 degrees (case3-4), 180 degrees (case3-5), 225 degrees (case3-6), 270 degrees (case3-7) and 315 degrees (case3-8); since the angle difference between the first sound leakage hole and the second sound leakage hole is 90 degrees, the opening angle of the second sound leakage hole is not repeated; wherein, the reference acoustic back cavity is case3-1.

[0113] Fig.13 The low-frequency in-ear frequency response data (in-ear SPL of 20-1000Hz), mid-frequency in-ear frequency response data (in-ear SPL of 1000-3150Hz), low-frequency center leakage sound response data (B3 leakage of 20-1000Hz), mid-frequency center leakage sound response data (B3 leakage of 1000-3150Hz), low-frequency average leakage sound response data (average external leakage sound of 20-1000Hz) and mid-frequency average leakage sound response data (average external leakage sound of 1000-3150Hz) corresponding to each preset acoustic back cavity in the second group are shown; the increase and decrease of the mid-frequency response data of case3-2 to case3-8 are all compared with case3-1 according to Fig.13 From the data shown, it can be seen that Case 3-1 and Case 3-3 have larger in-ear frequency response data and better leakage sound response data, and can be selected as candidate acoustic back cavities.

[0114] like Fig.14As shown, the third structure group includes a preset acoustic back cavity with three sound leakage holes, the three sound leakage holes include a first sound leakage hole, a second sound leakage hole and a third sound leakage hole, and the angle difference between the first sound leakage hole and the second sound leakage hole is 90 degrees, the angle difference between the second sound leakage hole and the third sound leakage hole is 90 degrees, and the angle difference between the third sound leakage hole and the first sound leakage hole is 180 degrees; in the multiple preset acoustic back cavities included in the third structure group, the opening angles of the first sound leakage hole are: the opening angles are 0 degrees (case4-1), 45 degrees (case4-2), 90 degrees (case4-3), and 180 degrees (case4-4). 3), 135 degrees (case4-4), 180 degrees (case4-5), 225 degrees (case4-6), 270 degrees (case4-7) and 315 degrees (case4-8); according to the angle difference between the first sound leakage hole and the second sound leakage hole, the angle difference between the second sound leakage hole and the third sound leakage hole, and the angle difference between the third sound leakage hole and the first sound leakage hole, the opening angles of the second sound leakage hole and the third sound leakage hole in the multiple preset acoustic back cavities included in the third structure group can be determined, which will not be repeated; wherein, the reference acoustic back cavity is case4-1.

[0115] Fig.15 The low-frequency in-ear frequency response data (in-ear SPL of 20-1000Hz), mid-frequency in-ear frequency response data (in-ear SPL of 1000-3150Hz), low-frequency center leakage sound response data (B3 leakage of 20-1000Hz), mid-frequency center leakage sound response data (B3 leakage of 1000-3150Hz), low-frequency average leakage sound response data (average external leakage sound of 20-1000Hz) and mid-frequency average leakage sound response data (average external leakage sound of 1000-3150Hz) corresponding to each preset acoustic back cavity in the third structure group are shown; the increase and decrease of the mid-frequency response data of case4-2 to case4-8 are all obtained by comparison with case4-1; according to Fig.15 From the data shown, it can be seen that Case 4-3 and Case 4-7 have larger in-ear frequency response data and better leakage sound response data, and can be selected as candidate acoustic back cavities.

[0116] like Fig.16 As shown, the fourth structure group includes a preset acoustic back cavity with four sound leakage holes, the four sound leakage holes include a first sound leakage hole, a second sound leakage hole, a third sound leakage hole and a fourth sound leakage hole, and the angle difference between two adjacent sound leakage holes among the four sound leakage holes is 90 degrees; in the multiple preset acoustic back cavities included in the fourth structure group, the opening angles of the first sound leakage hole are: the opening angles are 0 degrees (case5-1) and 90 degrees (case5-2), respectively; the angle difference between two adjacent sound leakage holes among the four sound leakage holes can determine the opening angles of the second sound leakage hole, the third sound leakage hole and the fourth sound leakage hole in the multiple preset acoustic back cavities included in the fourth structure group, which will not be repeated; wherein, the reference acoustic back cavity is case5-1.

[0117] Fig.17 The low-frequency in-ear frequency response data (in-ear SPL of 20-1000Hz), mid-frequency in-ear frequency response data (in-ear SPL of 1000-3150Hz), low-frequency center leakage sound response data (B3 leakage of 20-1000Hz), mid-frequency center leakage sound response data (B3 leakage of 1000-3150Hz), low-frequency average leakage sound response data (average external leakage sound of 20-1000Hz) and mid-frequency average leakage sound response data (average external leakage sound of 1000-3150Hz) corresponding to each preset acoustic back cavity in the fourth structure group are shown; the increase or decrease of the mid-frequency response data of case5-2 is obtained by comparison with case5-1; according to Fig.17 From the data shown, it can be seen that Case 5-2 has larger in-ear frequency response data and better leakage sound response data, and can be selected as a candidate acoustic back cavity.

[0118] A target acoustic back cavity is selected from the selected candidate acoustic back cavities according to the in-ear frequency response data and the leakage sound response data corresponding to the candidate acoustic back cavities respectively selected from the plurality of structure groups.

[0119] According to the above example, the candidate acoustic back cavities selected from multiple structure groups are: Case 1-1 (one sound leakage hole, with an opening angle of 0 degrees); Case 1-2 (one sound leakage hole, with an opening angle of 45 degrees), Case 1-3 (one sound leakage hole, with an opening angle of 90 degrees), Case 2-3 (two sound leakage holes, and the angle difference between the two sound leakage holes is 180 degrees, and the opening angle of the first sound leakage hole is 90 degrees); Case 3-1 (two sound leakage holes, and the angle difference between the two sound leakage holes is 180 degrees, and the opening angle of the first sound leakage hole is 0 degrees); Case 3-3 (two sound leakage holes, and the angle difference between the two sound leakage holes is 180 degrees, and the opening angle of the first sound leakage hole is 90 degrees); Case 4-3 (three sound leakage holes, and the opening angle of the first sound leakage hole is 90 degrees).

[0120] For Case 1-1, Fig.18 The front view, top view, side view and side view detail view of the external sound field distribution of the first object are shown; after the sound wave propagates out from the sound leakage hole, it will be reflected on the auricle to generate a passive sound source. This sound source has a certain phase difference with the active sound source formed by the sound leakage hole, which determines the distribution of the sound field outside the ear; the active sound source changes its propagation direction after reflection from the auricle; Case 1-1 sound source propagation mainly extends along the oblique front and lower part of the ear and the oblique upper part behind the ear.

[0121] According to the in-ear frequency response data, the average leakage sound response data and the center leakage sound response data, the target acoustic back cavity is selected from Case 1-1, Case 1-2, Case 1-3, Case 2-3, Case 3-1, Case 3-3 and Case 4-3, including: Case 1-1, Case 1-3, Case 3-3 and Case 4-3.

[0122] The preset acoustic back cavity of Case 1-1, Case 1-3, Case 3-3 and Case 4-3 is as follows Fig.19 As shown; the low-frequency in-ear frequency response data (in-ear SPL of 20-1000Hz), the mid-frequency in-ear frequency response data (in-ear SPL of 1000-3150Hz), the low-frequency center leakage sound response data (B3 leakage sound of 20-1000Hz), the mid-frequency center leakage sound response data (B3 leakage sound of 1000-3150Hz), the low-frequency average leakage sound response data (average external leakage sound of 20-1000Hz) and the mid-frequency average leakage sound response data (average external leakage sound of 1000-3150Hz) of Case 1-1, Case 1-3, Case 3-3 and Case 4-3 are as shown. Fig. 20 shown.

[0123] Based on the in-ear frequency response data of Case 1-1, Case 1-3, Case 3-3 and Case 4-3, we can get the following: Fig.21 The frequency response curve shown in Figure 1 is as follows: Based on the center leakage frequency response data of Case 1-1, Case 1-3, Case 3-3 and Case 4-3, the following is obtained: Fig. 22 The frequency response curve shown in Figure 1 is as follows; Based on the average leakage frequency response data of Case 1-1, Case 1-3, Case 3-3 and Case 4-3, the following is obtained: Fig.23 The frequency response curve is shown.

[0124] According to the above frequency response curve, Case 1-3 has a large sound leakage reduction in the range of 20-1000Hz (low frequency); Case 3-3 and Case 4-3 have lower low-frequency sound leakage and lower (1-3kHz) mid-frequency sound leakage, sacrificing part of the low-frequency ear frequency response. The reduction of the mid-frequency ear frequency response is mainly caused by the change of the resonance peak.

[0125] For Case 1-1, Case 1-3, Case 3-3, and Case 4-3, the external sound field at multiple frequencies was analyzed. Fig.24 The external sound fields of Case 1-1, Case 1-3, Case 3-3, and Case 4-3 at 100 Hz are shown; Fig.25The external sound fields of Case 1-1, Case 1-3, Case 3-3 and Case 4-3 at 1000 Hz are shown; Fig.26 The external sound fields of Case 1-1, Case 1-3, Case 3-3 and Case 4-3 at 2000 Hz are shown; Fig. 27 The external sound fields of Case 1-1, Case 1-3, Case 3-3 and Case 4-3 at 3150 Hz are shown.

[0126] From the external sound fields at the above multiple frequencies, we can see that the wavelength of low-frequency sound waves (100Hz and 1000Hz) is larger than the size of the auricle, so the diffraction ability of the sound waves is better, and the sound waves from the inner sound leakage holes can be diffracted to the outside, so the external sound field distribution is determined by the number and angle of the sound leakage holes. As the frequency increases, the wavelength becomes shorter and shorter, approaching the size of the auricle, and the diffraction ability of the sound waves becomes worse. The sound waves from the inner sound leakage holes cannot propagate to the outside, so the external sound field distribution of different cases is basically similar.

[0127] Taking Case 1-1 and Case 3-3 as examples, determine whether the data tested in the simulation test scenario is consistent with the data measured in the actual sound leakage test scenario.

[0128] In the actual sound leakage test scenario, Case 1-1 and Case 3-3 were tested, and the in-ear frequency response curve was generated based on the in-ear frequency response data and average sound leakage response data obtained in the actual sound leakage test scenario and the simulation test scenario; Fig.28 The in-ear frequency response curve in the actual sound leakage test scenario (Case1-1_Inner_Exp) and the in-ear frequency response curve in the simulation test scenario (Case1-1_Inner_Sim) corresponding to Case1-1; Fig.29 The following are the average leakage sound response curves in the actual sound leakage test scenario (Case 1-1_Ave_Exp) and the average leakage sound response curves in the simulation test scenario (Case1-1_Ave_Sim) corresponding to Case 1-1.

[0129] Fig.30 The following are the in-ear frequency response curves corresponding to Case 3-3 in the actual sound leakage test scenario (Case 3-3_Inner_Exp) and the in-ear frequency response curves in the simulation test scenario (Case 3-3_Inner_Sim); Fig.31 These are the average leakage sound response curve in the actual sound leakage test scenario (Case 3-3_Ave_Exp) and the average leakage sound response curve in the simulation test scenario (Case 3-3_Ave_Sim) corresponding to Case 3-3; it can be seen that the data tested in the simulation test scenario is consistent with the data measured in the actual sound leakage test scenario.

[0130] In summary, according to the selected Case 1-1, Case 1-3, Case 3-3 and Case 4-3, it can be known that the sound leakage hole with an opening angle of 90 degrees mainly reduces the low-frequency sound leakage. On this basis, adding a sound leakage hole with an opening angle of 180 degrees will reduce the mid-frequency sound leakage; therefore, the acoustic cavity structure for preventing sound leakage may include a first sound leakage hole, and the opening angle of the first sound leakage hole may also be adjusted near 90 degrees, such as the opening angle of the first sound leakage hole may be 90±45 degrees; it may also include a second sound leakage hole, and the opening angle of the second sound leakage hole may be adjusted near 180 degrees, such as the opening angle of the second sound leakage hole may be 180±45 degrees; it may also include a third sound leakage hole, and the opening angle of the third sound leakage hole may be adjusted near 270 degrees, such as the opening angle of the third sound leakage hole may be 270±45 degrees.

[0131] In the above embodiment, the preset acoustic back cavities are grouped according to the number of sound leakage holes. For each structure group, a candidate acoustic back cavity is selected in each structure group according to the in-ear frequency response data and the leakage sound response data. The candidate acoustic back cavities are then compared and the target acoustic back cavity is selected, so that the acoustic cavity structure can reduce sound leakage while ensuring the in-ear frequency response quality of the open wearable audio device, thereby improving the overall quality of the open wearable audio device.

[0132] In one possible implementation, Fig.32 As shown, the method for determining the acoustic cavity structure includes: importing a first object simulation model (such as a first artificial head) and a second object simulation model (such as a second artificial head) into acoustic simulation software, importing a device simulation model into the acoustic simulation software, and setting the first object simulation model to wear the device simulation model; setting an air domain in the acoustic simulation software, the air domain wrapping the first object simulation model, the second object simulation model and the device simulation model; setting the electromagnetic-mechanical parameters of the device simulation model according to the electromagnetic-mechanical properties of the open wearable audio device to meet the conditions of multi-physical field coupling, setting the acoustic far-field calculation to obtain the directivity of the far-end sound field, and meshing different areas to meet the requirements of the acoustic wavelength; setting different frequencies, including frequencies belonging to the low frequency band and the mid-frequency band; determining the simulation results when the open wearable audio device adopts a preset structure, and comparing the simulation results under different preset structures, and selecting the acoustic cavity structure in the preset structure.

[0133] In the above-mentioned method for determining the structure of the acoustic cavity, a sound leakage test scenario model is used to simulate a scenario in which a first object uses an open-type wearable audio device to test the impact of sound leakage on a second object, and when the open-type wearable audio device adopts a preset structure, the sound leakage test scenario model is used to determine the in-ear frequency response data received by the first object and the leakage sound response data received by the second object; the sound leakage test scenario model is close to the actual application scenario, so the in-ear frequency response data and the leakage sound response data can reflect the frequency response data in the actual application scenario, thereby improving the quality of the measured in-ear frequency response data and the leakage sound response data, and through simulation testing, the in-ear frequency response data and the leakage sound response data under each preset structure can be quickly obtained, thereby improving the efficiency of determining the structure of the acoustic cavity; by By comparing the in-ear frequency response data and the leakage sound response data under the preset structure, an acoustic cavity structure is selected, and the selected acoustic cavity structure includes an acoustic front cavity and an acoustic rear cavity. At least one sound leakage hole is opened on the acoustic rear cavity, and the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to the first angle range; the first angle range is the range of 45 degrees to 135 degrees; since sound leakage is caused by the acoustic cavity structure, determining the acoustic cavity structure can fundamentally reduce sound leakage and improve the simulated sound leakage effect of open wearable audio devices; in addition, the acoustic cavity structure is selected by combining the in-ear frequency response data and the leakage sound response data, which can reduce sound leakage while ensuring the in-ear frequency response quality of the open wearable audio device, thereby improving the overall quality of the open wearable audio device.

[0134] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0135] Based on the same inventive concept, Fig.33 A schematic diagram of the structure of the device for determining the acoustic cavity structure provided in this application, such as Fig.33 As shown, the acoustic cavity structure determination device 330 provided in this embodiment includes:

[0136] The simulation test module 3301 is used to determine the in-ear frequency response data received by the first object and the leakage sound response data received by the second object through a leakage sound test scenario model when the open wearable audio device adopts a preset structure; the leakage sound test scenario model is obtained by simulating a scenario in which the leakage sound affects the second object when the first object uses the open wearable audio device;

[0137] The structure selection module 3302 is used to select an acoustic cavity structure from a preset structure based on the in-ear frequency response data and the leakage sound response data.

[0138] An acoustic cavity structure includes an acoustic front cavity and an acoustic rear cavity; at least one sound leakage hole is opened on the acoustic rear cavity; the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to a first angle range; the first angle range is a range of 45 degrees to 135 degrees; the opening angle of the first sound leakage hole is the angle required for the wearing position reference axis to rotate in a preset direction to the line connecting the first sound leakage hole and the center of gravity of the acoustic rear cavity.

[0139] In some embodiments, the sound leakage test scenario model further includes a first object simulation model and a second object simulation model; the acoustic cavity structure determination device further includes: a test point selection module for determining a plurality of test points according to the ear canal entrance position of the first object simulation model;

[0140] The simulation test module 3301 is further used to determine the in-ear frequency response data received by the first object through the leakage sound test scene model, and when the ear canal entrance of the second object simulation model is respectively at multiple test points, determine the leakage audio response sub-data corresponding to multiple test points received by the second object; obtain the central leakage audio response data from the leakage audio response sub-data corresponding to the multiple test points; and determine the average leakage audio response data based on the leakage audio response sub-data corresponding to the multiple test points.

[0141] In some embodiments, the audio is audio at multiple preset frequencies; the multiple preset frequencies include frequencies belonging to a low frequency band and frequencies belonging to a mid-frequency band; the leakage audio response data includes center leakage audio response data and average leakage audio response data; the in-ear frequency response data includes low-frequency in-ear frequency response data and mid-frequency in-ear frequency response data; the center leakage audio response data includes: low-frequency center leakage audio response data and mid-frequency center leakage audio response data; the average leakage audio response data includes: low-frequency average leakage audio response data and mid-frequency average leakage audio response data.

[0142] In some embodiments, the preset structure includes a preset acoustic back cavity; the structure selection module 3302 is further used to group the preset acoustic back cavity according to the number of sound leakage holes to obtain multiple structure groups; the preset acoustic back cavities belonging to different structure groups have different numbers of sound leakage holes, and the multiple preset acoustic back cavities belonging to the same structure group have the same number of sound leakage holes and different opening angles; for each structure group, according to the in-ear frequency response data and leakage sound response data corresponding to the multiple preset acoustic back cavities in the targeted structure group, a candidate acoustic back cavity is selected from the targeted structure group; according to the in-ear frequency response data and leakage sound response data corresponding to the candidate acoustic back cavities selected from the multiple structure groups, a target acoustic back cavity is selected from the selected candidate acoustic back cavity, and the acoustic cavity structure corresponding to the target acoustic back cavity is determined.

[0143] The device for determining the acoustic cavity structure provided in this embodiment can execute the method provided in the above-mentioned method embodiment, and its implementation principle and technical effect are similar. Therefore, the specific limitations in the above-mentioned embodiment of the device for determining the acoustic cavity structure can be referred to the limitations on the method for determining the acoustic cavity structure in the above text, and will not be repeated here.

[0144] Each module in the above-mentioned device for determining the acoustic cavity structure can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each of the above modules.

[0145] In some embodiments, an acoustic cavity structure is also provided, which is an acoustic cavity structure determined according to the above-mentioned method for determining the acoustic cavity structure; the acoustic cavity structure includes an acoustic front cavity and an acoustic rear cavity; at least one sound leakage hole is opened in the acoustic rear cavity; the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to a first angle range; the first angle range is a range of 45 degrees to 135 degrees; the opening angle of the first sound leakage hole is the angle required for the wearing position reference axis to rotate in a preset direction to the line connecting the first sound leakage hole and the center of gravity of the acoustic rear cavity.

[0146] The first angle interval may be a range from 45 to 135 degrees; Fig.34 As shown, a first sound leakage hole is opened on the acoustic back cavity of the acoustic cavity structure, and the opening angle of the first sound leakage hole is between 45 and 135 degrees; as an example, the opening angle of the first sound leakage hole can be 90 degrees.

[0147] The opening angle of the first sound leakage hole belongs to the first angle range, which can reduce low-frequency sound leakage while ensuring the frequency response quality in the ear.

[0148] In some embodiments, the number of at least one sound leakage hole is two, and the at least one sound leakage hole further includes a second sound leakage hole; the angle difference between the opening angle of the second sound leakage hole and the opening angle of the first sound leakage hole is a preset angle difference.

[0149] The preset angle difference may be 90 degrees, that is, the opening angle of the second sound leakage hole is 90 degrees greater than the opening angle of the first sound leakage hole; for example, Fig.35 As shown, when the opening angle of the first sound leakage hole is 90 degrees, the opening angle of the second sound leakage hole is 180 degrees; for another example, when the opening angle of the first sound leakage hole is 120 degrees, the opening angle of the second sound leakage hole is 210 degrees.

[0150] In practical applications, since the opening angle of the first sound leakage hole belongs to the first angle range (including the angle range of 90 degrees), correspondingly, the opening angle of the second sound leakage hole may belong to the angle range including 180 degrees.

[0151] The opening angle of the first sound leakage hole belongs to the first angle range, which can reduce low-frequency sound leakage while ensuring the frequency response quality in the ear; the opening angle of the second sound leakage hole is 90 degrees larger than the opening angle of the first sound leakage hole, so that the second sound leakage hole can reduce mid-frequency sound leakage.

[0152] In some embodiments, the number of at least one sound leakage hole is three, and at least one sound leakage hole also includes a second sound leakage hole and a third sound leakage hole; the angle difference between the opening angle of the second sound leakage hole and the opening angle of the first sound leakage hole is a preset angle difference; the angle difference between the opening angle of the third sound leakage hole and the opening angle of the second sound leakage hole is a preset angle difference.

[0153] Among them, the preset angle difference can be 90 degrees, that is, the opening angle of the second sound leakage hole is 90 degrees larger than the opening angle of the first sound leakage hole, and the opening angle of the third sound leakage hole is 90 degrees larger than the opening angle of the second sound leakage hole.

[0154] For example, Fig.36 As shown, when the opening angle of the first sound leakage hole is 90 degrees, the opening angle of the second sound leakage hole is 180 degrees, and the opening angle of the third sound leakage hole is 270 degrees, that is, the acoustic back cavity of the acoustic cavity structure can be Case 4-3; for example, when the opening angle of the first sound leakage hole can be 120 degrees, the opening angle of the second sound leakage hole can be 210 degrees, and the opening angle of the third sound leakage hole can be 300 degrees.

[0155] In practical applications, since the opening angle of the first sound leakage hole belongs to the first angle range (including the angle range of 90 degrees), correspondingly, the opening angle of the second sound leakage hole may belong to the angle range including 180 degrees.

[0156] The opening angle of the first sound leakage hole belongs to the first angle range, which can reduce low-frequency sound leakage while ensuring the frequency response quality in the ear; the opening angle of the second sound leakage hole is 90 degrees larger than the opening angle of the first sound leakage hole, and the opening angle of the third sound leakage hole is 90 degrees larger than the opening angle of the second sound leakage hole, so that the second sound leakage hole and the third sound leakage hole can reduce mid-frequency sound leakage.

[0157] The above-mentioned acoustic cavity structure includes an acoustic front cavity and an acoustic back cavity; at least one sound leakage hole is opened on the acoustic back cavity; the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to the first angle range; the first angle range is the range of 45 degrees to 135 degrees; the opening angle of the first sound leakage hole is the angle required for the reference axis of the wearing position to rotate in a preset direction to the line connecting the first sound leakage hole and the center of gravity of the acoustic back cavity; since sound leakage is caused by the acoustic cavity structure itself, by limiting the sound leakage holes on the acoustic back cavity, that is, limiting the opening angle of the first sound leakage hole to belong to the first angle range, the sound leakage problem is fundamentally solved, and the sound leakage can be reduced while ensuring the frequency response quality in the ear, thereby improving the anti-sound leakage effect of the acoustic cavity structure.

[0158] In some embodiments, an open wearable audio device is also provided, including: a wearing structure and a sound-emitting unit, the wearing structure is connected to the sound-emitting unit; the sound-emitting unit includes a sound-emitting monomer and an acoustic cavity structure; the acoustic cavity structure is the above-mentioned acoustic cavity structure.

[0159] It should be noted that the above-mentioned acoustic cavity structure is an acoustic cavity structure obtained by the above-mentioned method for determining the acoustic cavity structure.

[0160] Among them, the wearing structure is a structure used to be fixed on the ear or head when in use. For example, when the open wearable audio device is an open headset, the wearing structure can be an ear clip; when the open wearable audio device is a smart eyeglass, the wearing structure can be a glasses frame.

[0161] The above-mentioned open wearable audio device adopts an acoustic cavity structure obtained by the above-mentioned method for determining the acoustic cavity structure, and the acoustic cavity structure includes an acoustic front cavity and an acoustic rear cavity; at least one sound leakage hole is opened on the acoustic rear cavity; the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to the first angle range; the first angle range is the range of 45 degrees to 135 degrees; the opening angle of the first sound leakage hole is the angle required for the reference axis of the wearing position to rotate in a preset direction to the line connecting the center of gravity of the first sound leakage hole and the acoustic rear cavity; since sound leakage is caused by the acoustic cavity structure itself, by limiting the sound leakage holes on the acoustic rear cavity, that is, limiting the opening angle of the first sound leakage hole to belong to the first angle range, the sound leakage problem is fundamentally solved, and the sound leakage can be reduced while ensuring the frequency response quality in the ear, thereby improving the sound leakage prevention effect of the acoustic cavity structure.

[0162] It can reduce sound leakage while ensuring the in-ear frequency response quality of open wearable audio devices, thereby improving the overall quality of open wearable audio devices.

[0163] Fig.37 This is a schematic diagram of the structure of the computer device provided in this application. Fig.37 As shown, the computer device 370 provided in this embodiment includes: at least one processor 3701 and a memory 3702. Optionally, the device 370 also includes a communication component 3703. The processor 3701, the memory 3702 and the communication component 3703 are connected via a bus 3704.

[0164] In the specific implementation process, at least one processor 3701 executes the computer execution instructions stored in the memory 3702, so that at least one processor 3701 executes the above method.

[0165] The specific implementation process of processor 3701 can be found in the above method embodiment. Its implementation principle and technical effects are similar, and will not be repeated here in this embodiment.

[0166] In the above embodiments, it should be understood that the processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the invention can be directly implemented as a hardware processor, or can be implemented by a combination of hardware and software modules in the processor.

[0167] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (NVM), such as at least one disk storage.

[0168] 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. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of this application is not limited to only one bus or one type of bus.

[0169] The embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, each step of the method in the above embodiment is implemented.

[0170] The embodiment of the present application also provides a computer program product, including computer executable instructions, which implement the various steps of the method in the above embodiment when executed by a processor.

[0171] 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, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0172] The above-mentioned readable storage medium can be implemented by 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 memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0173] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium 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 be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0174] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0175] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0176] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0177] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0178] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0179] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A method for determining an acoustic cavity structure, characterized in that: include: In the case where the open wearable audio device adopts a preset structure, the in-ear frequency response data received by the first object and the leakage sound response data received by the second object are determined by using a leakage sound test scenario model; the leakage sound test scenario model is obtained by simulating a scenario in which the first object uses the open wearable audio device to play audio and tests the impact on the second object; Selecting an acoustic cavity structure from the preset structure according to the in-ear frequency response data and the leakage sound response data; The acoustic cavity structure includes an acoustic front cavity and an acoustic rear cavity; at least one sound leakage hole is opened on the acoustic rear cavity; the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to a first angle range; the first angle range is a range of 45 degrees to 135 degrees; the opening angle of the first sound leakage hole is the angle required for the wearing position reference axis to rotate in a preset direction to the line connecting the first sound leakage hole and the center of gravity of the acoustic rear cavity.

2. The method according to claim 1, characterized in that The sound leakage test scenario model includes a first object simulation model and a second object simulation model; the method further includes: Determining a plurality of test points according to the position of the ear canal entrance of the first object simulation model; The leakage sound response data includes center leakage sound response data and average leakage sound response data; the step of determining the in-ear frequency response data received by the first object and the leakage sound response data received by the second object through the leakage sound test scene model includes: Determine the in-ear frequency response data received by the first object through the sound leakage test scene model, and determine the leakage sound response sub-data corresponding to the multiple test points respectively received by the second object when the ear canal entrances of the second object simulation model are respectively located at the multiple test points; Acquire the central leakage audio response data from the leakage audio response sub-data respectively corresponding to the plurality of test points; The average leakage audio response data is determined according to the leakage audio response sub-data respectively corresponding to the plurality of test points.

3. The method according to claim 1, characterized in that The preset structure includes a preset acoustic back cavity; The selecting an acoustic cavity structure from the preset structure according to the in-ear frequency response data and the leakage sound response data comprises: The preset acoustic back cavity is grouped according to the number of sound leakage holes to obtain a plurality of structural groups; the preset acoustic back cavities belonging to different structural groups have different numbers of sound leakage holes, and the plurality of preset acoustic back cavities belonging to the same structural group have the same number of sound leakage holes and are opened at different angles; For each structure group, according to the in-ear frequency response data and the leakage sound response data respectively corresponding to a plurality of preset acoustic back cavities in the structure group, a candidate acoustic back cavity is selected in the structure group; According to the in-ear frequency response data and the leakage sound response data corresponding to the candidate acoustic back cavities respectively selected from multiple structure groups, a target acoustic back cavity is selected from the selected candidate acoustic back cavities, and the acoustic cavity structure corresponding to the target acoustic back cavity is determined.

4. The method according to any one of claims 1 to 3, characterized in that The audio is audio at multiple preset frequencies; the multiple preset frequencies include frequencies belonging to a low frequency band and frequencies belonging to a mid-frequency band; The leakage audio response data includes center leakage audio response data and average leakage audio response data; The in-ear frequency response data includes low-frequency in-ear frequency response data and medium-frequency in-ear frequency response data; The center leakage audio response data includes: low-frequency center leakage audio response data and medium-frequency center leakage audio response data; the average leakage audio response data includes: low-frequency average leakage audio response data and medium-frequency average leakage audio response data.

5. An acoustic cavity structure, characterized in that: The acoustic cavity structure is determined by the determination method according to any one of claims 1 to 4, and the acoustic cavity structure comprises: an acoustic front cavity and an acoustic rear cavity; at least one sound leakage hole is provided on the acoustic rear cavity; The at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to a first angle range, and the first angle range is a range from 45 degrees to 135 degrees; The opening angle of the first sound leakage hole is the angle required for the wearing position reference axis to rotate in a preset direction to the line connecting the first sound leakage hole and the center of gravity of the acoustic back cavity.

6. The acoustic cavity structure according to claim 5, characterized in that: The number of the at least one sound leakage hole is two, and the at least one sound leakage hole further includes a second sound leakage hole; The angle difference between the opening angle of the second sound leakage hole and the opening angle of the first sound leakage hole is a preset angle difference.

7. The acoustic cavity structure according to claim 5, characterized in that: The number of the at least one sound leakage hole is three, and the at least one sound leakage hole further includes a second sound leakage hole and a third sound leakage hole; The angle difference between the opening angle of the second sound leakage hole and the opening angle of the first sound leakage hole is a preset angle difference; the angle difference between the opening angle of the third sound leakage hole and the opening angle of the second sound leakage hole is the preset angle difference.

8. An open wearable audio device, characterized in that: include: A wearing structure and a sound-generating unit, wherein the wearing structure is connected to the sound-generating unit; The sound-emitting unit includes a sound-emitting monomer and an acoustic cavity structure; The acoustic cavity structure is the acoustic cavity structure described in any one of claims 5-7.

9. A device for determining an acoustic cavity structure, characterized in that: The device comprises: A simulation test module, for determining, when the open wearable audio device adopts a preset structure, in-ear frequency response data received by the first object and leakage sound response data received by the second object through a leakage sound test scenario model; the leakage sound test scenario model is obtained by simulating a scenario in which the first object uses the open wearable audio device to play audio and tests the impact on the second object; A structure selection module, configured to select an acoustic cavity structure from the preset structure according to the in-ear frequency response data and the leakage sound response data; The acoustic cavity structure includes an acoustic front cavity and an acoustic rear cavity; at least one sound leakage hole is opened on the acoustic rear cavity; the at least one sound leakage hole includes a first sound leakage hole; the opening angle of the first sound leakage hole belongs to a first angle range; the first angle range is a range of 45 degrees to 135 degrees; the opening angle of the first sound leakage hole is the angle required for the wearing position reference axis to rotate in a preset direction to the line connecting the first sound leakage hole and the center of gravity of the acoustic rear cavity.

10. A computer device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 4.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 4 when executed by a processor.

12. A computer program product, characterized in that The method comprises computer-executable instructions, which implement the method according to any one of claims 1 to 4 when executed by a processor.

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