Method for changing structure form of sound box and sound box

Abstract

The application discloses a method for changing the structure form of a sound box and the sound box, and relates to the technical field of sound boxes. The method comprises the following steps: a wind pipe or a passive radiator is arranged in the rear cavity of the sound box; an opening is formed on the sound box corresponding to the rear cavity, so that the wind pipe or the passive radiator can communicate with the outside through the opening; two sets of tuning parameters are configured for the sound box, the first set of tuning parameters is suitable for a sealed sound box, and the second set of tuning parameters is suitable for a wind pipe sound box or a sound box with a passive radiator; the sealing state of the opening is detected, and the first set of tuning parameters or the second set of tuning parameters is automatically called according to the sealing state. The application changes the sealing state of the opening of the rear cavity of the sound box to switch the structure form of the sound box, calls the corresponding tuning parameters according to the different structure forms of the sound box, and thus different sound effects of the sound box can be generated to adapt to the presentation requirements of different styles of music, thereby optimizing the appreciation experience of users and expanding the application scenarios of a single sound box product.

Description

Technical Field

[0001] This invention belongs to the field of audio output device technology, and relates to a speaker, specifically, to a rear cavity structure of a speaker. Background Technology

[0002] A speaker is an audio playback device that amplifies audio signals and converts them into a louder sound.

[0003] Currently, speaker cabinet structures are predetermined during the initial design phase, including sealed cabinets, ducted cabinets, and cabinets with passive radiators, and these structures cannot be changed. Different cabinet structures produce significantly different sound effects, favoring different musical styles. Especially for small speakers, sealed cabinets generally have a relatively high resonant frequency (F0), resulting in insufficient bass extension and a weaker bass effect, lacking impact in the music. However, vocals and mid-to-high frequency instruments sound clean and clear, with a lighter musical style, making them less straining on the ears during extended listening (generally, heavier bass puts more strain on the ears, and prolonged listening to low-frequency music can cause ear fatigue), making them suitable for bedtime music. On the other hand, ducted cabinets and cabinets with passive radiators generally have a relatively low resonant frequency (F0), providing sufficient bass extension and power, resulting in a stronger bass effect and better bass performance, suitable for everyday music listening.

[0004] In actual use, consumers often play different styles of music through speakers. For example, when listening to symphonic music, they want the speakers to produce a powerful, deep bass effect; while when listening to pop music, they want the speakers to produce a clean, clear, and subtle bass effect. However, the speaker cabinet structure is fixed, and the sound effect it can produce is also fixed. Although the audio signal can be optimized through software processing, it is impossible to completely correct this. This leads to the problem that a single speaker is often not suitable for multiple usage scenarios. To meet consumers' needs for high-quality listening to different types of music, they need to purchase multiple speakers with different cabinet structures, thus increasing their purchase costs. Summary of the Invention

[0005] The purpose of this invention is to provide a method for changing the shape of a speaker enclosure to solve the problem that existing speakers, due to their fixed enclosure structure, can only produce a single sound effect.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] In one aspect, the present invention proposes a method for changing the structural form of a speaker enclosure, comprising:

[0008] Install a duct or passive radiator in the rear cavity of the speaker;

[0009] An opening is formed on the cabinet corresponding to the rear cavity of the speaker, so that the duct or passive radiator can communicate with the outside through the opening;

[0010] Configure two sets of tuning parameters for the speaker. The first set of tuning parameters is suitable for sealed enclosures, and the second set of tuning parameters is suitable for ducted enclosures or enclosures with passive radiators.

[0011] The system detects the blocking status of the opening and automatically calls up either the first set of tuning parameters or the second set of tuning parameters based on the blocking status.

[0012] In some embodiments of this application, during the process of calling tuning parameters according to the blocking status of the opening, if the opening is blocked, the first set of tuning parameters is called, which can make the speaker produce a powerful bass playback effect; if the opening is not blocked, the second set of tuning parameters is called, which can make the speaker produce a clean and clear weak bass playback effect, suitable for playing light music.

[0013] In some embodiments of this application, the following process may also be used when detecting the opening closure status:

[0014] The tightness of the opening seal is checked;

[0015] If the opening is tightly sealed, it means that the speaker's enclosure is a sealed enclosure at this time, and the first set of tuning parameters can be called to make the speaker produce the sound effect that a sealed enclosure can produce;

[0016] If the opening is sealed but there is air leakage, a prompt message can be output to remind the user that the opening is not sealed tightly.

[0017] If the opening is not blocked, it means that the speaker is currently in the form of a duct cabinet or a cabinet with a passive radiator. The second set of tuning parameters can be called to make the speaker produce the sound effect that a duct cabinet or a cabinet with a passive radiator can produce.

[0018] In some embodiments of this application, the following process may also be used when detecting the opening closure status:

[0019] Configure the speaker with a sealing component to seal the opening;

[0020] Check whether the sealing component is installed in the opening;

[0021] If the sealing component is installed, the tightness of the opening seal is further tested:

[0022] If the opening is tightly sealed, it means that the speaker's enclosure is a sealed enclosure at this time, and the first set of tuning parameters can be called to make the speaker produce the sound effect that a sealed enclosure can produce;

[0023] If the opening is sealed but there is air leakage, it means that the sealing component is not tightened. In this case, a prompt message can be output to remind the user to tighten the sealing component.

[0024] If the sealing component is not installed in the opening, it is possible to further detect whether the opening is obstructed:

[0025] If there is no obstruction, it means that the speaker is currently in the form of a duct cabinet or a cabinet with a passive radiator. You can call the second set of tuning parameters to make the speaker produce the sound effect that a duct cabinet or a cabinet with a passive radiator can produce.

[0026] If the opening is blocked, it means that the opening is blocked by an external wall. In this case, a prompt message can be output to remind the user to place the speaker in an open area in order to obtain the desired sound effect.

[0027] In some embodiments of this application, in order to automatically detect the tightness of the opening seal, a microphone can be installed in the rear cavity of the speaker to collect the sound pressure and wind noise in the rear cavity; if the sound pressure is high and no wind noise is detected, it indicates that the opening is tightly sealed; if the sound pressure is high and wind noise is detected, it indicates that the opening is sealed but there is air leakage; if the sound pressure is low and wind noise is high, it indicates that the opening is not sealed.

[0028] In another aspect, the present invention also proposes a speaker enclosure, comprising an enclosure body, a duct or passive radiator, a sealing component, a detection module, and a control module; wherein, the enclosure body has an inner cavity in which a loudspeaker is installed, and the inner cavity is divided into a front cavity and a rear cavity according to the arrangement direction of the loudspeaker; an opening is formed on the enclosure body corresponding to the rear cavity; the duct or passive radiator is installed in the rear cavity and can communicate with the outside through the opening; the sealing component is used to selectively seal the opening; the detection module is installed on the enclosure body and is used to detect the sealing status of the opening; the control module is configured with two sets of tuning parameters, the first set of tuning parameters is suitable for sealed enclosures, and the second set of tuning parameters is suitable for duct enclosures or enclosures with passive radiators; the control module automatically calls the first set of tuning parameters or the second set of tuning parameters according to the sealing status detected by the detection module.

[0029] In some embodiments of this application, a sensing element can be set in the detection module to detect whether the sealing component is installed in the opening and generate a detection signal to be sent to the control module. When the control module detects that the opening is blocked by the sensing element, it indicates that the speaker cabinet has been switched to a sealed cabinet form. At this time, the first set of tuning parameters can be called to better present light music. Conversely, when the control module detects that the opening is not blocked by the sensing element, it indicates that the speaker cabinet has been switched to a duct cabinet form or a cabinet form with a passive radiator. At this time, the second set of tuning parameters can be called to better present powerful music.

[0030] In some embodiments of this application, a microphone can also be set in the detection module and installed in the rear cavity to collect sound pressure and wind noise in the rear cavity and send the collected signal to the control module. When the control module detects high sound pressure and no wind noise in the rear cavity through the microphone, it can determine that the opening is tightly sealed, indicating that the speaker cabinet has been switched to a sealed cabinet form. At this time, the first set of tuning parameters can be called to better present light music. If high sound pressure and wind noise are detected in the rear cavity, it can be determined that the opening is sealed but there is air leakage. At this time, the user can be reminded to check whether the sealing component is installed properly so that the user can obtain the ideal sound effect. If low sound pressure and high wind noise are detected in the rear cavity, it can be determined that the opening is not sealed, indicating that the speaker cabinet has been switched to a duct cabinet form or a cabinet form with a passive radiator. At this time, the second set of tuning parameters can be called to better present powerful music.

[0031] In some embodiments of this application, a sensing element and a microphone may be simultaneously provided in the detection module; wherein, the sensing element is used to detect whether the sealing component is installed in the opening and generates a detection signal to be sent to the control module; the microphone is installed in the rear cavity to collect the sound pressure and wind noise in the rear cavity and send the collected signal to the control module; the control module can perform the following processing steps based on the opening sealing status detected by the sensing element and the sound pressure and wind noise collected by the microphone:

[0032] If the opening is blocked and the sound pressure in the rear cavity is high and no wind noise can be detected, it can be determined that the opening is tightly blocked, indicating that the speaker cabinet has been switched to a sealed cabinet mode. At this time, the first set of tuning parameters can be called to better present the light music.

[0033] If the opening is blocked and the sound pressure in the rear cavity is high but there is wind noise, it can be determined that the opening is blocked but there is air leakage. At this time, the user can be reminded to check whether the sealing component is installed in place so that the user can obtain the ideal sound effect.

[0034] If the opening is not blocked and the sound pressure in the rear cavity is low and the wind noise is high, it can be determined that the opening is open, indicating that the speaker cabinet has been switched to the duct cabinet form or the cabinet form with a passive radiator. At this time, the second set of tuning parameters can be called to better present powerful music.

[0035] If the opening is not blocked, but the sound pressure in the rear cavity is high and there is wind noise, it can be determined that the opening is blocked by the external wall. At this time, a prompt message can be output to remind the user to place the speaker in an open area in order to obtain the sound effect desired by the user.

[0036] In some embodiments of this application, in order to intuitively guide users in solving problems affecting the sound output of the speaker, the control module can be configured to control the speaker in the speaker to play a prompt voice reminding the user to tighten the sealing component when it is determined that the opening is blocked but there is air leakage; when it is determined that the opening is blocked by a wall, the speaker can be configured to play a prompt voice reminding the user to place the speaker in an open area to guide the user's operation.

[0037] Compared with existing technologies, the advantages and positive effects of this invention are as follows: By opening an opening in the cabinet corresponding to the rear cavity of the speaker and installing a duct or passive radiator in the rear cavity, the structural form of the speaker cabinet can be changed by sealing or opening the opening. When the opening is sealed, the duct or passive radiator in the speaker cannot interact with the outside environment. In this case, by using the tuning parameters used by the sealed cabinet, the speaker can produce a sound effect similar to that produced by a speaker with an existing sealed cabinet structure, suitable for users to enjoy light music. Conversely, when the opening is open, the duct or passive radiator in the speaker can interact with the outside environment through the opening. In this case, by using the tuning parameters used by the duct cabinet or the cabinet with a passive radiator, the speaker can produce a sound effect similar to that produced by a speaker with an existing duct cabinet or the cabinet with a passive radiator structure, suitable for users to enjoy powerful music. Therefore, consumers only need to purchase one speaker to enjoy two different styles of music, which not only expands the usage scenarios of the speaker and meets the inherent usage needs in different scenarios, but also saves consumers' purchase costs.

[0038] Other features and advantages of the present invention will become clearer after reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a flowchart of an embodiment of the method for changing the structural form of a speaker enclosure proposed in this invention;

[0041] Figure 2 This is a schematic diagram of the internal structure of a speaker according to an embodiment of the present invention;

[0042] Figure 3 yes Figure 2 The diagram shown illustrates the structure of a speaker when a sealing component is inserted into the opening of its enclosure.

[0043] Figure 4 This is a schematic diagram of the internal structure of another embodiment of the speaker proposed in this invention;

[0044] Figure 5 It is a flowchart that uses sensing elements and microphones to detect the sealing method and degree of sealing of the speaker opening. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be noted that the terms "inner", "outer", "front", "rear", etc., which indicate direction or positional relationship, are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0047] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0049] This embodiment addresses the problem that the cabinet structure of existing speakers cannot be changed once it is determined. It proposes a method that allows for alteration of the speaker cabinet structure, the main design concept of which is as follows: Figure 1 As shown, it includes:

[0050] S101. Install a duct or passive radiator in the rear cavity of the speaker.

[0051] The front and rear chambers of a speaker enclosure are determined by the speaker's placement within the enclosure. Specifically, a speaker produces sound through a diaphragm; the surface from which the sound originates is defined as the front of the speaker, and the opposite surface is called the back. The cavity between the front of the speaker and the enclosure is called the front chamber, and the cavity between the back of the speaker and the enclosure is called the rear chamber. The front chamber is the sound reflection zone, amplifying the sound, while the rear chamber enhances the sound intensity.

[0052] In this embodiment, either a duct or a passive radiator is installed in the rear cavity of the speaker; either one can be chosen. If a duct is used, its specific layout can mimic the ductwork arrangement used in existing ducted speaker enclosures, such as... Figure 2 The diagram shows the ductwork layout. If passive radiators are used, their specific layout can be modeled after the passive radiator layout used in existing speaker enclosures with built-in passive radiators, such as... Figure 4 The passive radiator layout shown is not described in detail in this embodiment.

[0053] S102. An opening is formed on the cabinet corresponding to the rear cavity of the speaker, so that the air duct or passive radiator installed in the rear cavity can communicate with the outside through the opening.

[0054] Both the duct and the passive radiator enhance bass energy, and their operation requires the rear cavity of the speaker enclosure to be connected to the outside environment so that they can interact with the surroundings. Therefore, this embodiment provides an opening in the cabinet corresponding to the rear cavity of the speaker enclosure. The location of the opening should be chosen to allow the duct or passive radiator installed in the rear cavity to communicate with the outside environment through the opening. (Refer to...) Figure 2 , Figure 4 The positional relationship is shown. When the opening is open, the speaker cabinet is in the shape of a duct cabinet (for cases where a duct is installed in the rear cavity) or a cabinet with a passive radiator (for cases where a passive radiator is installed in the rear cavity), which is suitable for playing music with a strong impact.

[0055] S103, A sealing component is provided for the speaker to seal the rear cavity opening.

[0056] To achieve the transformation of the speaker cabinet structure, a sealing component can be configured for the speaker, specifically used to seal the opening formed by the rear cavity. When the opening is sealed, the duct or passive radiator located in the rear cavity of the speaker can no longer communicate with the outside and function, thus losing the bass energy enhancement effect. At this time, the speaker cabinet presents a sealed cabinet structure, which is suitable for playing light music.

[0057] S104 provides two sets of tuning parameters suitable for different cabinet structures.

[0058] To achieve ideal sound effects for different music styles, it's necessary to consider both the speaker cabinet's structural form and the appropriate tuning parameters configured for the audio signal processing software running on the speaker. Since the speaker cabinet in this embodiment can exhibit two different structural forms, a set of matching tuning parameters is required for each cabinet form. Only through the combination of these two factors can high-quality playback of different music styles be achieved.

[0059] Therefore, this embodiment pre-configures two sets of tuning parameters in the speaker: the first set of tuning parameters is suitable for sealed enclosures and can be selected from the tuning parameters used by existing sealed enclosure speakers; the second set of tuning parameters is suitable for duct enclosures (for cases where ducts are installed in the rear cavity) or enclosures with passive radiators (for cases where passive radiators are installed in the rear cavity) and can be selected from the tuning parameters used by existing duct enclosure speakers (for cases where ducts are installed in the rear cavity) or enclosures with passive radiators (for cases where passive radiators are installed in the rear cavity).

[0060] S105. Detect the sealing status of the rear cavity opening and automatically call up a set of matching tuning parameters according to the sealing status.

[0061] Specifically, if the rear cavity opening is blocked, that is, the speaker cabinet has a sealed cabinet structure, then the first set of tuning parameters is used; if the rear cavity opening is not blocked, that is, the speaker cabinet has a duct cabinet structure (for cases where a duct is installed in the rear cavity) or a cabinet structure with a passive radiator (for cases where a passive radiator is installed in the rear cavity), then the second set of tuning parameters is used.

[0062] Based on the design concept of the above-mentioned speaker enclosure structure transformation method, this embodiment improves the structure of existing speakers. For speakers equipped with ductwork, this embodiment proposes the following... Figure 2 The enclosure structure design shown is proposed in this embodiment for a speaker enclosure equipped with a passive radiator. Figure 4 The box structure design is shown.

[0063] The following two specific examples illustrate in detail the cabinet structure of a speaker with a duct and a speaker with a passive radiator.

[0064] Example 1, see Figure 2 The speaker in this embodiment includes a cabinet 10, a speaker 20, a control module 30, a sealing component 40, a detection module 50, an air duct 60, and other main components.

[0065] The enclosure 10 has a hollow structure, with the hollow portion forming an inner cavity. The speaker 20 is installed in the inner cavity of the enclosure. The inner cavity is divided into a front cavity and a rear cavity according to the sound output direction. The division method is existing technology and will not be described in detail in this embodiment.

[0066] An opening 11 is formed on the housing 10. The opening 11 is located in the rear cavity area of ​​the housing and serves to connect the rear cavity of the housing with the outside.

[0067] The duct 60 is installed in the rear cavity of the housing 10 and faces the opening 11 so that the duct 60 can interact with the outside world through the opening 11 to form a resonator, thereby enhancing the energy of the low-frequency sound played through the speaker 20 and producing a deep bass effect.

[0068] The sealing component 40 is used to seal the opening 11. Its shape and size can be specifically determined according to the shape and size of the opening 11, and should achieve the effect of completely sealing the opening 11.

[0069] In this embodiment, the sealing component 40 can be configured independently of the box body 10, or it can be movably assembled onto the box body 10 via a connector to reduce the risk of loss.

[0070] The detection module 50 is installed on the housing 10 and is used to detect the sealing status of the opening 11.

[0071] The control module 30 may include an audio control chip, a processor, and a memory, etc., for audio signal processing, audio playback control, and storing two sets of tuning parameters, etc. In this embodiment, the control module 30 may be located in the front cavity, rear cavity, or a separately partitioned electrical compartment formed by the enclosure 10; this embodiment does not impose specific limitations on this.

[0072] In order for the speaker to automatically select appropriate tuning parameters according to the blocking state of its rear cavity opening 11 and realize automatic switching of sound effects, this embodiment is configured with a control module 30 to receive the detection signal output by the detection module 50, automatically identify the blocking state of the opening according to the detection signal, and then automatically retrieve a set of tuning parameters according to the identified blocking state, participate in the software processing of audio signals, and drive the speaker 20 to produce sound, thereby producing different sound playback effects.

[0073] In this embodiment, a sensing element can be provided in the detection module 50 and placed on the inner or outer wall of the speaker enclosure 10, near the opening 11, to detect whether a sealing component 40 is present in the opening 11.

[0074] The sensing element can be selected to match the structure or material of the sealing component 40. For example, if the sealing component 40 is made of non-metallic materials such as a rubber stopper or cork stopper, the sealing component 40 can be designed in a T-shape, such as... Figure 2 The structure is shown. When the sealing component 40 is inserted into the opening 11, the portion of the sealing component 40 protruding from the outer wall of the box 10 should protrude beyond the outer wall of the box 10, or the portion extending into the opening 11 should protrude beyond the inner wall of the box 10, such as... Figure 3 As shown. At this time, the sensing element can be a distance sensor or a photoelectric switch, etc., and is installed on the outer wall of the box 10 (for the case where the part of the sealing component 40 exposed outside the box 10 protrudes from the outer wall of the box 10) or the inner wall (for the case where the part of the sealing component 40 extending into the opening 11 protrudes from the inner wall of the box 10), so as to realize the automatic detection function of whether the sealing component 40 is inserted into the opening 11.

[0075] If the sealing component 40 is made of metal, such as a metal threaded cap or a magnetic cap, the sensing element can be a Hall sensor installed on the inner or outer wall of the speaker enclosure 10, using the principle of electromagnetic induction to identify whether the sealing component 40 exists in the opening 11.

[0076] The sensing element generates a corresponding detection signal based on the sensing result and sends it to the control module 30, such as to the processor in the control module 30, to identify whether the opening 11 is blocked. For example, if a sealing component 40 is detected in the opening 11, the opening 11 is determined to be blocked; if a sealing component 40 is detected not in the opening 11, the opening 11 is determined to be unblocked.

[0077] When the speaker opening 11 is blocked, the cabinet 10 has a sealed cabinet structure. The processor retrieves the first set of tuning parameters from the memory. At this time, the speaker is more suitable for playing light music.

[0078] When the speaker opening 11 is not blocked, the cabinet 10 has the structure of a duct cabinet. The processor retrieves the second set of tuning parameters from the memory. At this time, the speaker is more suitable for playing powerful music.

[0079] Consumers can choose to either block or leave the speaker opening 11 open, depending on the music style they wish to enjoy, to achieve a sound playback effect that matches the desired music style.

[0080] Of course, a microphone can also be set in the detection module 50 to detect changes in sound pressure and wind noise in the cavity, thereby identifying whether the opening 11 is blocked and the degree of blockage.

[0081] Specifically, a microphone can be installed in the rear cavity of the speaker enclosure 10, for example, mounted on the inner wall of the enclosure 10 near the opening 11. During operation, the microphone collects sound from the rear cavity, converts it into an audio signal, and sends it to the control module 30. After processing the audio signal, the control module 30 calculates the sound pressure level and wind noise level within the rear cavity. The process of calculating the sound pressure level and wind noise level based on the audio signal collected by the microphone is existing technology and will not be described in detail here.

[0082] If the sound pressure in the rear cavity is high and wind noise is virtually undetectable, it can be determined that the opening 11 is blocked and tightly sealed. At this time, the control module 30 calls the first set of tuning parameters, which, together with the sealed enclosure 10, produce a sound effect with weak bass but clear and clean mid-high frequencies.

[0083] If the sound pressure in the rear cavity is high but there is wind noise, it can be determined that the opening 11 is blocked, but there is air leakage. That is, the opening 11 is not sealed tightly, and the more serious the air leakage, the lower the sound pressure and the greater the wind noise. At this time, no matter which set of tuning parameters the control module 30 calls, the ideal sound playback effect cannot be obtained. In this case, in order to ensure the sound quality of the speaker, a prompt message can be output through the speaker to remind the consumer to tighten the sealing component 40. The prompt message can be output through the speaker 20 in the speaker in the form of playing a prompt tone; or, for speakers equipped with a display screen, it can be displayed on the display screen in the form of text or a combination of text and graphics. This embodiment does not impose specific limitations on this.

[0084] If the sound pressure in the rear cavity is low and the wind noise is high, it can be determined that the opening 11 is not sealed. At this time, the control module 30 calls the second set of tuning parameters to produce a powerful bass and a strong sound effect in conjunction with the sealed enclosure 10.

[0085] Considering that the speaker may be placed close to a wall during actual use, there may be a situation where the wall blocks the speaker opening 11 instead of sealing it with the sealing component 40. In order to accurately identify the sealing method and degree of the speaker opening 11, this embodiment preferably configures a sensing element and a microphone in the detection module 50. The sensing element is used to detect whether there is a sealing component 40 in the opening 11, and the microphone is used to detect the sound pressure and wind noise in the rear cavity. The sealing method and degree of the opening 11 are judged by combining the detection results of the two.

[0086] Specifically, combined Figure 5As shown, the detection process for the sealing method and degree of sealing of the speaker opening 11 in this embodiment mainly includes the following steps:

[0087] S501. Check whether a sealing component 40 is installed in the speaker opening 11.

[0088] In this embodiment, a sensing element is first used to detect whether a sealing component 40 exists in the speaker opening 11, and a detection signal is generated and sent to the control module 30. If the control module 30 determines that there is a sealing component 40 in the opening 11 based on the received detection signal, it executes the subsequent steps; otherwise, it jumps to step S505 for execution.

[0089] S502, Check the tightness of the seal on the speaker opening 11.

[0090] In this embodiment, a microphone configured in the rear cavity of the speaker is used to collect the sound in the rear cavity and convert it into an audio signal, which is then sent to the control module 30. After processing, the sound pressure and wind noise in the rear cavity are obtained. When the speaker opening 11 is sealed with a sealing component 40, if the sound pressure in the rear cavity is high and there is basically no wind noise, it can be considered that the speaker opening 11 is tightly sealed, and the speaker cabinet 10 has a sealed cabinet structure. If the sound pressure in the rear cavity is high but there is wind noise, it is considered that the speaker opening 11 is not tightly sealed and there is an air leakage problem.

[0091] S503. When the speaker opening 11 is tightly sealed, call the first set of tuning parameters.

[0092] If the speaker opening 11 is tightly sealed, it indicates that the user wants to enjoy light music. In this case, the control module 30 can call the first set of tuning parameters to produce the sound effect that a speaker with an existing sealed enclosure can produce. The current detection process ends.

[0093] S504. When there is air leakage at the speaker opening 11, output a prompt message to remind the user to tighten the sealing component 40.

[0094] If a sealing component 40 is present in the speaker opening 11, it indicates that the user intends to switch the speaker's cabinet structure to a sealed cabinet. However, because the sealing component 40 is not properly installed, air leakage occurs, which affects the speaker's sound output quality. To ensure a good user experience, this embodiment is designed to output prompt information, such as playing a prompt tone or displaying prompt text or images, to remind the user to tighten the sealing component 40. Return to step S502 to continue the detection.

[0095] S505. When the sealing component 40 is not installed in the speaker opening 11, detect the obstruction status of the speaker opening 11.

[0096] In this embodiment, when the sensing element does not detect the presence of the sealing component 40 in the speaker opening 11, the microphone continues to collect sound pressure and wind noise within the rear cavity to determine whether the speaker opening 11 is obstructed by an external object. Specifically, if the sound pressure in the rear cavity is high and there is wind noise, it can be assumed that the speaker opening 40 is obstructed by an external object, such as when the speaker is placed close to a wall, in which case the opening 11 is obstructed by the wall. Since the user has not installed the sealing component 40, it indicates that the user intends to switch the speaker's cabinet structure to a ducted cabinet. However, at this time, the speaker opening 11 is obstructed by an external object, affecting the connection between the duct 60 inside the cavity and the outside world. Therefore, the duct 60 cannot perform its function of enhancing bass energy, which will affect the sound output quality of the speaker and fail to achieve the desired listening effect. Therefore, a special reminder needs to be issued to the user in this situation.

[0097] S506. When the speaker opening 11 is not blocked, call the second set of tuning parameters.

[0098] If the sensing element does not detect a sealing component 40 in the speaker opening 11, and the microphone detects low sound pressure and high wind noise in the rear cavity of the speaker, then the speaker opening 11 is considered to be completely open, and the speaker enclosure 10 is assumed to have a duct-like enclosure structure. At this point, the control module 30 can call up the second set of tuning parameters to produce the sound effect that a speaker with a conventional sealed duct enclosure can produce. The current detection process then ends.

[0099] S507: When the speaker opening 11 is blocked by an external object, output a prompt message to remind the user to place the speaker in an open area.

[0100] If the sensing element does not detect a sealing component 40 in the speaker opening 11, but the microphone detects high sound pressure in the speaker's rear cavity accompanied by wind noise, it is assumed that the speaker opening 11 is blocked, but not by the sealing component 40, but by external obstructions such as walls. In this case, to ensure a good user experience, this embodiment designs the speaker to output prompt information, such as playing a prompt tone or displaying prompt text or images, to remind the user to place the speaker in an open area to avoid affecting the listening experience. Then, the process returns to step S505 to continue the detection.

[0101] Example 2, see Figure 4 As shown, the only difference between this embodiment and Embodiment 1 is that a passive radiator 70 is used instead of the duct 60 in Embodiment 1 to enhance bass energy.

[0102] The passive radiator 70 is disposed in the rear cavity of the speaker enclosure 10, preferably directly opposite the opening 11 formed on the enclosure 10. When the speaker opening 11 is blocked, the passive radiator 70 is isolated from the external space, and the enclosure 10 is in a sealed enclosure structure. The first set of tuning parameters can be used to enable the speaker of this embodiment to produce the sound effects that existing sealed enclosure speakers can produce, suitable for enjoying light and airy music. Conversely, when the speaker opening 11 is open, the passive radiator 70 interacts with the outside world. The enclosure 10 is in a enclosure structure with a passive radiator, and the second set of tuning parameters can be used to enable the speaker of this embodiment to produce the sound effects that existing enclosure speakers with passive radiators can produce, suitable for enjoying powerful and impactful music.

[0103] The method for detecting the sealing status and degree of sealing of the speaker opening 11 can be referred to the relevant description in Embodiment 1, and will not be repeated here.

[0104] The speaker in this embodiment can provide users with two different styles of music listening experience, which can meet the inherent usage needs in different usage scenarios and help improve user satisfaction with the speaker product.

[0105] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A method for changing the shape of a speaker cabinet structure, characterized by, include: Install a duct or passive radiator in the rear cavity of the speaker; An opening is formed on the cabinet corresponding to the rear cavity of the speaker, so that the duct or passive radiator can communicate with the outside through the opening; Configure two sets of tuning parameters for the speaker. The first set of tuning parameters is suitable for sealed enclosures, and the second set of tuning parameters is suitable for ducted enclosures or enclosures with passive radiators. Configure the speaker with a sealing component to seal the opening; A microphone is placed inside the rear cavity of the speaker to collect sound pressure and wind noise in the rear cavity; Check whether the sealing component is installed in the opening; If the sealing component is installed, and the microphone detects a high sound pressure in the rear cavity and no wind noise is detected, then the opening is determined to be tightly sealed, and the first set of tuning parameters is invoked. If the sealing component is installed, but the microphone detects high sound pressure and wind noise in the rear cavity, it is determined that the opening is blocked but there is air leakage. A prompt message is output to remind the user to tighten the sealing component. If the sealing component is not installed, and the microphone detects low sound pressure and high wind noise in the rear cavity, then the opening is determined to be open, and the second set of tuning parameters is invoked. If the sealing component is not installed, but the microphone detects high sound pressure and wind noise in the rear cavity, it is determined that the opening is blocked by an external obstruction, and a prompt message is output to remind the user to place the speaker in an open area.

2. A sound box, characterized in that, include: The enclosure has an inner cavity in which a loudspeaker is installed. The inner cavity is divided into a front cavity and a rear cavity according to the direction in which the loudspeaker is arranged. An opening is formed on the box body corresponding to the rear cavity; A duct or passive radiator is installed in the rear cavity and can communicate with the outside through the opening; A sealing component for selectively sealing the opening; The control module is equipped with two sets of tuning parameters. The first set of tuning parameters is suitable for sealed enclosures, and the second set of tuning parameters is suitable for duct enclosures or enclosures with passive radiators. A sensing element is used to detect whether the sealing component is installed in the opening and to generate a detection signal to be sent to the control module; A microphone, installed in the rear cavity, is used to collect sound pressure and wind noise in the rear cavity and send the collected signals to the control module; The control module performs the following process: When the opening is detected to be blocked by the sensing element, and the sound pressure in the rear cavity is high and no wind noise is detected by the microphone, it is determined that the opening is tightly blocked, and the first set of tuning parameters is invoked. When the opening is detected to be blocked by the sensing element, but the sound pressure in the rear cavity is high and there is wind noise detected by the microphone, it is determined that the opening is blocked but there is air leakage, and the speaker is controlled to play a prompt voice to remind the user to tighten the sealing component. When the sensor detects that the opening is not blocked, and the microphone detects that the sound pressure in the rear cavity is low and the wind noise is high, the opening is determined to be open, and the second set of tuning parameters is invoked. When it is detected by the inductive element that the opening is not blocked, but it is detected by the microphone that the sound pressure in the back cavity is large and there is wind noise, it is determined that the opening is blocked by an external obstruction, and the loudspeaker is controlled to play a prompt voice for reminding the user to place the sound box in an open area.

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