Variable vocal cavity loudspeaker, control method and device thereof and storage medium

Abstract

The invention relates to the technical field of loudspeakers, and discloses a variable vocal cavity loudspeaker and a control method and device thereof, and a storage medium, and the loudspeaker comprises a loudspeaker body which comprises a front cavity and a rear cavity, and the rear cavity is internally provided with a vocal cavity adjustment mechanism which can be driven to move so as to change the effective volume of the rear cavity; the scene judgment module is used for acquiring a current application scene; the acoustic parameter matching module is used for determining a corresponding target acoustic parameter according to the application scene information; the control module is connected with the acoustic parameter matching module and is used for generating a control instruction according to the target acoustic parameter; and the execution mechanism is connected with the control module and is used for driving the sound cavity adjusting mechanism according to the control instruction, so that the acoustic characteristics of the loudspeaker body are matched with the target acoustic parameters. Through the synergistic effect of the modules, adaptive adjustment of the sound cavity of the loudspeaker is realized, excellent sound quality can be presented in multiple scenes without additional peripherals, and the problem that the volume adjustment in a fixed mode is disjointed with the actual scene demand is solved, so that the user experience is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of loudspeaker technology, and more particularly to variable cavity loudspeakers and their control methods, devices and storage media. Background Technology

[0002] With the rapid iteration of the consumer electronics industry, smartphones, tablets, and other mobile devices have become the core carriers for people's audio entertainment and communication interaction. Users have put forward diversified and scenario-based high-level demands for the sound performance of these devices. In different application scenarios, users' needs for audio frequency bands vary significantly: for example, in music playback scenarios, a full bass extension and clear mid-frequency resolution are required to reproduce the layering of music; gaming scenarios require highlighting the positioning accuracy of high-frequency sound effects to enhance the immersive experience; and call scenarios require optimizing the clarity of mid-to-high frequency human voice bands to reduce environmental noise interference.

[0003] To meet different application scenarios, this is currently mainly achieved by adjusting the acoustic cavity volume. However, in practical applications, a product is not used in only one fixed application scenario. Therefore, the same acoustic cavity state cannot adapt to various user needs. Furthermore, different scenarios such as music playback, gaming, and phone calls have significantly different requirements for frequency response curves. This leads to a disconnect between the volume adjustment technology and the actual scenario requirements, making it difficult to balance sound quality performance in multiple scenarios.

[0004] Therefore, improvements to existing technologies are necessary. Summary of the Invention

[0005] This invention provides a variable acoustic cavity loudspeaker and its control method, device and storage medium to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A variable cavity loudspeaker, comprising:

[0008] The loudspeaker body has a front cavity and a rear cavity. The rear cavity is provided with a acoustic cavity adjustment mechanism, which can be driven to move to change the effective volume of the rear cavity.

[0009] The scene discrimination module is used to obtain the current application scene;

[0010] An acoustic parameter matching module, connected to the application scenario discrimination module, is used to determine the corresponding target acoustic parameters based on the application scenario information;

[0011] A control module, connected to the acoustic parameter matching module, is used to generate control commands based on the target acoustic parameters;

[0012] An actuator, connected to the control module, is used to drive the acoustic cavity adjustment mechanism according to the control command, so that the acoustic characteristics of the speaker body match the target acoustic parameters.

[0013] Optionally, the application scenario information includes at least one scenario information related to the current audio usage state, and the application scenario information is used to characterize the acoustic output requirements of the speaker.

[0014] Optionally, the target acoustic parameters include one or more of the loudspeaker's resonant frequency, frequency response distribution, sound pressure level, and low-frequency cutoff characteristics.

[0015] Optionally, the actuator includes a drive motor, and the acoustic cavity adjustment mechanism includes a sliding partition disposed in the rear cavity. The sliding partition is used to move in a predetermined direction under the drive of the drive motor to change the effective volume of the rear cavity.

[0016] Optionally, a limiting structure is provided in the rear cavity. The limiting structure is located on the moving path of the sliding partition and is used to limit the moving stroke of the sliding partition, thereby limiting the minimum effective volume and the maximum effective volume of the rear cavity.

[0017] Optionally, the rear cavity includes a first acoustic cavity and a second acoustic cavity that are interconnected.

[0018] The first acoustic cavity is a fixed-volume acoustic cavity, and the second acoustic cavity is a variable-volume acoustic cavity; the sliding partition is slidably disposed within the second acoustic cavity;

[0019] Two limiting structures are provided, located on opposite sides of the second acoustic cavity, to limit the maximum displacement stroke of the sliding partition.

[0020] Optionally, the periphery of the sliding partition is provided with a sealing structure for maintaining the airtightness of the rear cavity.

[0021] The present invention also provides a control method for a variable cavity loudspeaker, applied to the variable cavity loudspeaker as described in any of the preceding claims, the control method comprising:

[0022] Obtain the current application scenario;

[0023] Based on the application scenario information, determine the corresponding target acoustic parameters;

[0024] Generate control commands based on the target acoustic parameters;

[0025] The drive actuator adjusts the effective volume of the speaker's rear cavity so that the speaker's acoustic characteristics match the target acoustic parameters.

[0026] The present invention also provides a computing device, comprising:

[0027] Memory, used to store program instructions;

[0028] The processor is configured to invoke program instructions stored in the memory and execute the control method for the variable cavity loudspeaker as described above according to the obtained program.

[0029] The present invention also provides a computer-readable non-volatile storage medium including computer-readable instructions that, when read and executed by a computer, cause the computer to perform the control method for a variable cavity loudspeaker as described above.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The variable acoustic cavity loudspeaker, its control method, device, and storage medium provided by this invention achieve adaptive adjustment of the loudspeaker's acoustic cavity through the synergistic effect of a scene discrimination module, an acoustic parameter matching module, a control module, and an acoustic cavity adjustment mechanism. It can present excellent sound quality in multiple scenarios without additional peripherals, solving the problem of the fixed mode adjustment volume being out of touch with the actual scenario requirements, thereby effectively improving the user experience.

[0032] The present invention has other features and advantages, which will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of the invention. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a structural block diagram of the variable acoustic cavity loudspeaker provided in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the rear cavity structure of the loudspeaker body in the variable acoustic cavity loudspeaker provided in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of another rear cavity structure of the speaker body in the variable acoustic cavity speaker provided in the embodiment of the present invention;

[0037] Figure 4 This is a flowchart of a control method for a variable cavity loudspeaker provided in an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram illustrating the principle of a control method for a variable cavity loudspeaker provided in this embodiment of the invention, which dynamically adjusts the acoustic characteristics of the loudspeaker through closed-loop control logic.

[0039] Figure 6 This is a frequency response curve of a variable cavity loudspeaker in call mode and music mode in the control method for a variable cavity loudspeaker provided in the embodiments of the present invention.

[0040] Reference numerals: 10, speaker body; 11, rear cavity; 111, first acoustic cavity; 112, second acoustic cavity; 113, sliding partition; 114, sealing structure; 115, drive motor; 116, first limiting structure; 117, second limiting structure; 20, scene discrimination module; 30, acoustic parameter matching module; 40, control module; 50, execution module. Detailed Implementation

[0041] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0042] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0043] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0044] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0045] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0046] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0047] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0048] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0049] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0050] Please refer to Figure 1 This invention provides a variable acoustic cavity loudspeaker. Through the coordinated action of the scene discrimination module 20, the acoustic parameter matching module 30, the control module 40 and the acoustic cavity adjustment mechanism, the loudspeaker's acoustic cavity can be adaptively adjusted to solve the problem that the acoustic characteristics of the loudspeaker in the prior art do not match the actual application scenario.

[0051] The structure and control method of a variable acoustic cavity loudspeaker will be further described below in conjunction with the overall technical concept of the present invention.

[0052] In this embodiment, the variable-sound loudspeaker includes a loudspeaker body 10, a scene discrimination module 20, an acoustic parameter matching module 30, a control module 40, and an execution module 50.

[0053] Please refer to the reference. Figure 2 and Figure 3 The speaker body 10 has a front cavity and a rear cavity 11 that are isolated from each other. The rear cavity 11 is provided with a acoustic cavity adjustment mechanism, which can change its position under the action of an external driving force, thereby changing the effective volume of the rear cavity 11.

[0054] It is understandable that the volume of the rear cavity 11 of the loudspeaker directly affects the acoustic equivalent parameters of the loudspeaker system, especially the resonant frequency and low-frequency response characteristics. In this embodiment, the controllable adjustment of the effective volume of the rear cavity 11 provides a physical basis for the dynamic change of the acoustic characteristics of the loudspeaker.

[0055] Furthermore, the acoustic cavity adjustment mechanism includes a sliding partition 113 disposed in the rear cavity 11.

[0056] In one embodiment, the rear cavity 11 is a single-cavity structure, which allows the travel of the sliding partition 113 to bring about more sensitive changes in acoustic characteristics.

[0057] In another embodiment, the rear cavity 11 of the loudspeaker is composed of a first acoustic cavity 111 and a second acoustic cavity 112 that are interconnected. The first acoustic cavity 111 is a fixed-volume acoustic cavity, and the second acoustic cavity 112 is a variable-volume acoustic cavity. A sliding partition 113 that can move along a predetermined direction is disposed within the second acoustic cavity 112. Driven by an actuator, the sliding partition 113 changes its position within the second acoustic cavity 112, thereby changing the overall effective volume of the rear cavity 11. When the sliding partition 113 is in different positions, the equivalent volume of the rear cavity 11 changes, and the corresponding acoustic characteristics of the loudspeaker are adjusted accordingly. Compared to the aforementioned single-cavity solution, this embodiment allows for more subtle adjustments to the acoustic characteristics.

[0058] The scene discrimination module 20 is used to obtain the application scene information of the current speaker, such as relevant scene information reflecting the audio usage status. By introducing the scene discrimination module 20, the acoustic adjustment of the speaker no longer relies on manual settings, but can automatically respond according to the actual usage status, providing input basis for the adaptive matching of subsequent acoustic parameters at the system level.

[0059] The acoustic parameter matching module 30 is connected to the application scenario discrimination module 20 and is used to determine the corresponding target acoustic parameters based on the application scenario information.

[0060] In this embodiment, the acoustic parameter matching module 30 is used to determine the target acoustic parameters corresponding to the current application scenario based on the acquired application scenario information. The target acoustic parameters can be understood as a quantitative description of the acoustic characteristics that the speaker should present in the current usage state, such as emphasizing low-frequency performance, or emphasizing speech intelligibility and energy concentration.

[0061] By mapping application scenario information to target acoustic parameters, subsequent control is no longer a simple scene switching, but is transformed into an adjustment requirement for specific acoustic indicators, thereby improving the rationality and versatility of the adjustment logic.

[0062] The control module 40 is connected to the acoustic parameter matching module 30 and is used to generate control commands based on the target acoustic parameters. Specifically, based on the output of the acoustic parameter matching module 30, the control module 40 generates corresponding control commands according to the determined target acoustic parameters.

[0063] The actuator is connected to the control module 40 and is used to drive the acoustic cavity adjustment mechanism according to the control command so that the acoustic characteristics of the speaker body 10 match the target acoustic parameters.

[0064] Understandably, the function of the control module 40 is to transform abstract acoustic parameter requirements into executable control signals to drive the specific actuators. The actuators are connected to the control module 40 and are used to drive the acoustic cavity adjustment mechanism according to the control commands.

[0065] In one alternative embodiment, the actuator includes a drive motor 115, the drive force output by the drive motor 115 acting on the sliding partition 113 to cause it to move in a predetermined direction.

[0066] To ensure the positional stability and controllability of the adjustment range of the sliding partition 113 during the adjustment process, a limiting structure is provided in the rear cavity 11. The limiting structure is located on the moving path of the sliding partition 113 to limit the moving stroke of the sliding partition 113, thereby limiting the minimum and maximum effective volume of the rear cavity 11.

[0067] In some optional embodiments, two limiting structures are provided, respectively disposed on opposite sides of the second acoustic cavity 112, to limit the maximum displacement stroke of the sliding partition 113. When the sliding partition 113 moves to near the first limiting position, the effective volume of the rear cavity 11 is in a smaller state; when the sliding partition 113 moves to near the second limiting position, the effective volume of the rear cavity 11 is in a larger state. By setting the limiting structures, the volume of the rear cavity 11 can be varied within a preset range, avoiding reliability problems caused by structural interference or overtravel.

[0068] In a specific parameter example, when the sliding partition 113 moves to a position close to the first limiting structure 116, the effective volume of the speaker's rear cavity 11 is approximately 0.5cc. At this point, the resonant frequency of the speaker system increases accordingly, for example, to approximately 1100Hz. In this state, the speaker's low-frequency sound pressure output is suppressed, which is more conducive to the concentration of energy in the human voice frequency band, thereby reducing sound leakage and improving speech clarity in applications such as phone calls. Conversely, when the sliding partition 113 moves to a position close to the second limiting structure 117, the effective volume of the speaker's rear cavity 11 can increase to approximately 2.0cc. At this point, the resonant frequency of the speaker system decreases accordingly, for example, to approximately 700Hz, thereby significantly improving the low-frequency response and enabling the speaker to achieve better bass performance in applications such as music playback. Through the above method, a stable and predictable correspondence is established between the change in the volume of the rear cavity 11 and the speaker's acoustic parameters.

[0069] Meanwhile, to prevent air leakage in the rear cavity 11 during the movement of the sliding partition 113, which would affect the acoustic performance, a sealing structure 114 is provided around the periphery of the sliding partition 113. This sealing structure 114 remains in contact with the inner wall of the rear cavity 11 while the sliding partition 113 moves, thereby maintaining the airtightness of the rear cavity 11 under different volume conditions, reducing acoustic parameter shifts caused by leakage, and ensuring the stability of the acoustic cavity adjustment effect.

[0070] In specific applications, the current application scenarios can include call scenarios and music scenarios. When the scenario discrimination module 20 identifies a call scenario, the acoustic parameter matching module 30 determines the acoustic parameters with the goal of increasing the resonant frequency and suppressing low-frequency output, and the control module 40 moves the sliding partition 113 in the direction of reducing the volume of the rear cavity 11 based on the drive actuator.

[0071] For example, when the scene discrimination module 20 identifies a music scene, the acoustic parameter matching module 30 determines the acoustic parameters with the goal of reducing the resonance frequency and enhancing the low-frequency response, and the control module 40 drives the actuator to move the sliding partition 113 in the direction of increasing the volume of the rear cavity 11.

[0072] Based on this, this embodiment can achieve adaptive switching of the acoustic characteristics of the same speaker in different application scenarios without changing the speaker hardware. Furthermore, the target acoustic parameters include one or more of the speaker's resonant frequency, frequency response distribution, sound pressure level, and low-frequency cutoff characteristics.

[0073] Please refer to Figure 4 Based on the variable cavity loudspeaker structure provided in the foregoing embodiments, this embodiment of the invention provides a control method for a variable cavity loudspeaker, applied to any of the variable cavity loudspeakers described above, the control method comprising:

[0074] S1. Obtain the current application scenario;

[0075] S2. Determine the corresponding target acoustic parameters based on the application scenario information;

[0076] S3. Generate control commands based on the target acoustic parameters;

[0077] S4. Drive the actuator to adjust the effective volume of the speaker's rear cavity 11 so that the speaker's acoustic characteristics match the target acoustic parameters.

[0078] Please refer to further information. Figure 5 In this embodiment, the control method is based on the principle of scene-adaptive acoustic optimization. It achieves dynamic adjustment of the loudspeaker's acoustic characteristics through closed-loop control logic. The specific execution process is as follows:

[0079] The first step is to obtain the current application scenario.

[0080] By calling the phone's system API to read the type of currently running application and the audio output status, the system can accurately identify whether it is a call or a music playback scenario. The core of this step is to achieve seamless automatic scenario recognition without requiring manual operation from the user, thus improving ease of use.

[0081] The second step is to determine the target acoustic parameters.

[0082] Based on the mapping relationship between scenarios and acoustic parameters, for call scenarios, the target parameters are determined with high resonant frequency (around 1140Hz), frequency response distribution focusing on the human voice frequency band, and low sound pressure level as the core. For music scenarios, the target parameters are determined with low resonant frequency (around 678Hz), wideband response distribution, high sound pressure level, and low frequency extension to 200Hz as the core. This mapping relationship is the optimal matching model established through a large number of acoustic simulation experiments and user hearing tests.

[0083] The third step is to generate control commands. The control module 40 (mobile SOC) calculates the required moving direction and stroke of the sliding partition 113 based on the target acoustic parameters and the preset correspondence between "acoustic parameters and stroke", and then generates the control signal for the drive motor 115 to ensure the accuracy of the control commands.

[0084] The fourth step is to adjust the effective volume of the rear cavity 11. After receiving the control command, the actuator (drive motor 115) drives the sliding partition 113 to move to the target position in the predetermined direction through the drive rod. With the cooperation of the limiting structure and the sealing structure 114, the effective volume of the rear cavity 11 reaches the target value, thereby adjusting the acoustic characteristics to match the target parameters.

[0085] Please refer to Figure 6 The graph shows the frequency response curves of the variable cavity speaker in call mode (dashed line) and music mode (solid line), clearly demonstrating the differences in acoustic characteristics between the two scenarios: the music mode curve shows a significantly higher and flatter sound pressure level in the low-frequency range (20Hz-400Hz), corresponding to the design of an enlarged rear cavity 11 volume and a lower resonant frequency, which meets the demand for abundant low-frequency extension in music scenarios; the call mode curve shows a more concentrated sound pressure level and a lower overall sound pressure level in the core vocal frequency range (1000Hz-2000Hz), corresponding to the design of a smaller rear cavity 11 volume and an increased resonant frequency, which ensures both clear vocals during calls and reduces sound leakage. The difference in the curves in the graph demonstrates the effectiveness of the variable cavity design. Through dynamic adjustment of the rear cavity 11 volume, the speaker can be specifically adapted to the acoustic needs of different scenarios, solving the problem that traditional fixed cavity speakers cannot handle multiple scenarios simultaneously.

[0086] In summary, the core of the control method provided in this embodiment lies in its adaptive optimization from scene recognition to sound quality optimization, which requires no manual intervention and can adapt to user needs in real time. Compared with traditional fixed-cavity control methods, this embodiment optimizes acoustic characteristics at the physical structure level, avoiding distortion problems caused by electronic compensation, and fundamentally improving sound quality in different scenarios.

[0087] The control method for a variable cavity loudspeaker provided in this embodiment enables a clear control closed-loop link to be formed in the cavity adjustment process.

[0088] Based on the foregoing embodiments, the present invention provides a computing device, comprising:

[0089] Memory, used to store program instructions;

[0090] The processor is used to call program instructions stored in memory and execute the control method for the variable cavity loudspeaker as described above according to the obtained program.

[0091] Specifically, this computing device can be integrated into mobile terminals such as mobile phones, where its memory and processor work together to provide hardware support for the control method of variable acoustic cavity speakers.

[0092] The memory stores preset program instructions, including core data such as scene recognition algorithms, scene-to-acoustic parameter mapping models, and control command generation logic. The scene recognition algorithm is used to parse application scene information obtained from the mobile phone system API. The mapping model stores the association data between scenes such as calls and music and corresponding target acoustic parameters. The control command generation logic defines the conversion rules from acoustic parameters to control signals for the drive motor 115. The high-speed storage characteristics of the memory ensure rapid reading and retrieval of program instructions.

[0093] As the core computing unit, the processor has efficient data processing capabilities. By calling program instructions in memory, it first analyzes and identifies the acquired application scenario information to determine the current scenario type. Then, it queries the corresponding target acoustic parameters based on the mapping model and optimizes the parameters in combination with the real-time operating status. Next, it generates precise control instructions based on the optimized target parameters. The control instructions include key information such as the rotation direction, speed, and stop position of the drive motor 115. Finally, the control instructions are sent to the actuator to drive the sliding partition 113 to move and adjust the volume of the rear cavity 11.

[0094] Furthermore, based on the foregoing embodiments, the present invention also provides a computer-readable non-volatile storage medium, including computer-readable instructions, which, when read and executed by a computer, cause the computer to perform the control method for a variable cavity loudspeaker as described above.

[0095] In this embodiment, the computer-readable non-volatile storage medium provides a stable storage carrier for the program instructions of the variable cavity loudspeaker control method. Its non-volatile characteristics ensure that the computer-readable instructions will not be lost in abnormal situations such as power failure, thus ensuring the continuous availability of the control method.

[0096] The computer-readable instructions stored in the storage medium contain logic code for the entire process, including scene recognition, parameter matching, instruction generation, and execution control. These instructions are developed based on acoustic principles, mechanical control theory, and computer programming technology, and have high compatibility and executability.

[0097] Specifically, when a computer (such as a mobile phone processor) reads and executes these instructions, it first starts the scene recognition module, obtains the current application scene data through interface calls, and determines the scene type through instruction parsing; then it executes the parameter matching algorithm, calculates the target acoustic parameters that meet the requirements of the current scene according to the preset scene-to-parameter mapping relationship; then it runs the instruction generation program, converts the target acoustic parameters into control signals that the actuator can recognize; finally, it drives the motor 115 and the sliding partition 113 to move by executing control instructions, and completes the volume adjustment and acoustic characteristic optimization of the cavity 11.

[0098] Understandably, the storage capacity and read speed of this storage medium meet the storage and retrieval requirements of control instructions, and its compatibility ensures that the instructions can be executed normally in different types of computer devices, providing a basis for the widespread application of variable cavity loudspeaker control methods.

[0099] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not be construed as limiting the scope of protection of this application. Any technical solutions resulting from equivalent structural or procedural substitutions or modifications made based on the essential concept of this application and utilizing the content described in the text and drawings of this application, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of protection of this application.

Claims

1. A variable cavity loudspeaker, characterized in that, include: The loudspeaker body has a front cavity and a rear cavity. The rear cavity is provided with a acoustic cavity adjustment mechanism, which can be driven to move to change the effective volume of the rear cavity. The scene discrimination module is used to obtain the current application scene; An acoustic parameter matching module, connected to the application scenario discrimination module, is used to determine the corresponding target acoustic parameters based on the application scenario information; A control module, connected to the acoustic parameter matching module, is used to generate control commands based on the target acoustic parameters; An actuator, connected to the control module, is used to drive the acoustic cavity adjustment mechanism according to the control command, so that the acoustic characteristics of the speaker body match the target acoustic parameters.

2. The variable acoustic cavity loudspeaker according to claim 1, characterized in that, The application scenario information includes at least one scenario information related to the current audio usage status, and the application scenario information is used to characterize the acoustic output requirements of the speaker.

3. The variable acoustic cavity loudspeaker according to claim 1, characterized in that, The target acoustic parameters include one or more of the loudspeaker's resonant frequency, frequency response distribution, sound pressure level, and low-frequency cutoff characteristics.

4. The variable acoustic cavity loudspeaker according to claim 1, characterized in that, The actuator includes a drive motor, and the acoustic cavity adjustment mechanism includes a sliding partition disposed in the rear cavity. The sliding partition is used to move in a predetermined direction under the drive of the drive motor to change the effective volume of the rear cavity.

5. The variable acoustic cavity loudspeaker according to claim 4, characterized in that, The rear cavity is provided with a limiting structure, which is located on the moving path of the sliding partition to limit the moving stroke of the sliding partition, thereby limiting the minimum and maximum effective volume of the rear cavity.

6. The variable acoustic cavity loudspeaker according to claim 5, characterized in that, The rear cavity includes a first acoustic cavity and a second acoustic cavity that are interconnected. The first acoustic cavity is a fixed-volume acoustic cavity, and the second acoustic cavity is a variable-volume acoustic cavity; the sliding partition is slidably disposed within the second acoustic cavity; Two limiting structures are provided, located on opposite sides of the second acoustic cavity, to limit the maximum displacement stroke of the sliding partition.

7. The variable acoustic cavity loudspeaker according to claim 4, characterized in that, The periphery of the sliding partition is provided with a sealing structure for maintaining the airtightness of the rear cavity.

8. A control method for a variable cavity loudspeaker, characterized in that, The control method, applied to a variable cavity loudspeaker as described in any one of claims 1 to 7, comprises: Obtain the current application scenario; Based on the application scenario information, determine the corresponding target acoustic parameters; Generate control commands based on the target acoustic parameters; The drive actuator adjusts the effective volume of the speaker's rear cavity so that the speaker's acoustic characteristics match the target acoustic parameters.

9. A computing device, characterized in that, include: Memory, used to store program instructions; A processor is configured to invoke program instructions stored in the memory and execute the control method for a variable cavity loudspeaker as described in claim 8 according to the obtained program.

10. A computer-readable non-volatile storage medium, characterized in that, It includes computer-readable instructions that, when read and executed by a computer, cause the computer to perform the control method for a variable cavity loudspeaker as described in claim 8.

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