Loudspeaker box control system capable of separating treble and bass and control method thereof

Abstract

The invention relates to the technical field of sound boxes, in particular to a control system and a control method of a sound box capable of separating high and low sound, and the control method comprises the steps: controlling a second sound production unit to be maintained in a low-frequency dominant first mode through a control assembly, and controlling a first sound production unit to be maintained in a high-frequency pre-starting second mode, the sound box is controlled to output audio in a basic frequency division mode; and in response to the situation that the high-frequency energy ratio of the audio is stabilized above a preset fixed threshold value, controlling the sound box to continuously output in a high-pitch enhancement mode, and then controlling the first sound production unit and the second sound production unit to synchronously maintain in a third mode of frequency band precise coupling through the adjusting mechanism. Through the high-low pitch separation design, interference between low frequency and high frequency can be effectively avoided, when high-frequency energy in audio is high, the system can enhance high-pitch output, when low-frequency signals are dominant, the low-pitch unit works preferentially, and the definition and detail performance of the audio are improved.

Description

Technical Field

[0001] This invention relates to the field of speaker control technology, specifically to a control system and control method for a speaker capable of separating high and low frequencies. Background Technology

[0002] A speaker is a device that converts electrical signals into sound and is widely used in audio playback systems.

[0003] Currently, with the development of audio technology and the increasing demands of users for sound quality, the limitations of traditional speakers in frequency band processing and sound quality adjustment are becoming increasingly apparent. In particular, when processing high and low frequencies, speakers are prone to problems such as distortion, interference, and uneven sound quality. In order to adapt to the changing audio content and different listening environments, the market demand for speaker systems that can provide clearer, more accurate, and higher quality sound is becoming increasingly strong.

[0004] In addition, the overlap or interference of high and low frequencies is a common problem in traditional audio systems. When the frequency ranges of the two overlap, it often leads to blurry and unclear sound quality. This is especially noticeable when the bass or treble signals are strong, affecting the performance of the speakers. With the popularization of smart devices and audio systems, users have higher expectations for the energy efficiency and lifespan of audio devices. Maintaining the performance of the device and balancing energy consumption in standby and low power consumption states has become an important design goal. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a control system for a speaker capable of separating high and low frequencies, the speaker comprising a main body, a sound-generating component, and a control component;

[0006] The sound-generating component includes a first sound-generating unit and a second sound-generating unit respectively disposed on both sides of the main body. The first sound-generating unit and the second sound-generating unit can switch frequency division modes within a preset frequency range under the control of the adjustment mechanism. The control component is disposed inside the main body and is electrically connected to the first sound-generating unit, the second sound-generating unit and the adjustment mechanism respectively.

[0007] Wherein, the inherent resonant frequency of the first sound-emitting unit is higher than that of the second sound-emitting unit, and the frequency bands of the first sound-emitting unit and the second sound-emitting unit have a preset overlap range.

[0008] The control system includes:

[0009] The first control module is used to control the second sound unit to maintain in a low-frequency dominant first mode, control the first sound unit to maintain in a high-frequency pre-start second mode, and control the speaker to output audio in a basic crossover mode.

[0010] The second control module is used to respond to the real-time spectral complexity of the audio reaching a preset complexity threshold, and control the second sound unit to gradually switch from the first mode to the wideband adaptation mode through the adjustment mechanism. The frequency band complementarity of the first sound unit and the second sound unit cancels the crossover distortion, and the speaker improves the sound quality resolution through dynamic transition mode.

[0011] The third control module is used to control the speaker to continuously output in high-frequency enhancement mode in response to the high-frequency energy ratio of the audio being stable above a preset fixed threshold. Then, the adjustment mechanism controls the first sound unit and the second sound unit to synchronously maintain a third mode of precise frequency band coupling.

[0012] Preferably, the control system further includes:

[0013] The fourth control module is used to control the control components to maintain a real-time monitoring state, and to control the first sound unit to maintain in the second mode and the second sound unit to maintain in the first mode through the adjustment mechanism, and to simultaneously reduce the output gain of the first sound unit and the second sound unit, so as to control the speaker to standby in a low-power crossover mode.

[0014] Preferably, after controlling the speaker to continuously output in high-frequency enhancement mode, the control system further includes:

[0015] The output characteristics of the speaker are controlled by the state changes of the first sound-emitting unit and the second sound-emitting unit; wherein, controlling the output characteristics of the speaker by the state changes of the first sound-emitting unit and the second sound-emitting unit includes:

[0016] The sound image localization of the speaker is controlled by controlling the gain difference between the first sound-producing unit and the second sound-producing unit;

[0017] The warmth or coolness of the speaker's tone can be controlled by adjusting the crossover point of the first and / or second sound-generating units upward or downward within a preset frequency range.

[0018] Preferably, controlling the speaker to output audio in a fundamental crossover mode includes:

[0019] The control component is kept in spectrum analysis state, and the first sound unit is kept in the second mode to cancel low-frequency harmonic interference.

[0020] Controlling the speaker to continuously output in high-frequency enhancement mode includes:

[0021] The second sound unit is controlled to reduce low-frequency gain in order to reduce frequency band overlap interference.

[0022] Preferably, the control system further includes:

[0023] In response to the speaker being in the basic crossover mode, the high-frequency gain of the first sound-emitting unit is controlled to be greater than the high-frequency gain of the second sound-emitting unit;

[0024] In response to the speaker being in a dynamic transition mode, the gain adjustment rate of the first sound-emitting unit is controlled to be equal to the gain adjustment rate of the second sound-emitting unit.

[0025] Preferably, the first sound-emitting unit and the second sound-emitting unit are symmetrically arranged along the acoustic center of the main body. The main body also includes an internal signal processing board, the central axis of which is collinear with the line of symmetry of the first sound-emitting unit and the second sound-emitting unit, and the control component is integrated on the signal processing board.

[0026] Preferably, the method for calculating the real-time spectral complexity of the audio includes:

[0027] The audio signal is acquired under a reference state and under various dynamic changing states, wherein the characteristic signal includes at least two of the following: time-domain waveform signal, frequency-domain distribution signal, energy fluctuation signal, and harmonic component signal.

[0028] The spectrum of the characteristic signal under each dynamic change state is obtained to obtain the dynamic spectrum; the spectrum of the characteristic signal under the reference state is obtained to obtain the reference spectrum; and the frequency bands of the spectrum are divided.

[0029] Calculate the frequency band fluctuation of the dynamic spectrum and the reference spectrum in different frequency bands;

[0030] Determining the complexity weights of different characteristic signals in each frequency band under each dynamic change state based on the frequency band fluctuation; wherein, determining the complexity weights of different characteristic signals in each frequency band under each dynamic change state based on the frequency band fluctuation includes:

[0031] The sum of the frequency band fluctuations corresponding to different characteristic signals is taken as the total fluctuation amount;

[0032] For each dynamic change state, the ratio of the frequency band fluctuation of any feature signal in any frequency band to the total fluctuation is used as the complexity weight of the feature signal in that frequency band.

[0033] Based on the complexity weight, the same frequency bands in multiple dynamic spectra under the same dynamic change state are fused to obtain the comprehensive dynamic spectrum;

[0034] The dynamic spectrum of multiple frequency bands is connected to obtain the dynamic fused spectrum; multiple characteristic signals during audio playback are acquired in real time, and the real-time dynamic spectrum is obtained; the frequency bands of multiple real-time dynamic spectra are fused to obtain the real-time fused spectrum; the differences between each dynamic fused spectrum and the real-time fused spectrum are compared to obtain the spectrum similarity.

[0035] The complexity score is calculated based on spectral similarity, and the real-time spectral complexity of the audio is determined based on the complexity score.

[0036] Preferably, calculating the frequency band fluctuation of the dynamic spectrum and the reference spectrum in different frequency bands includes:

[0037] For each dynamic spectrum under each dynamic change state, obtain the fluctuation difference of the elements with the same position in the same frequency band of the dynamic spectrum and the reference spectrum.

[0038] The sum of the squares of the fluctuation differences corresponding to all elements in the frequency band is taken as the frequency band fluctuation.

[0039] Based on complexity weights, the same frequency bands in multiple dynamic spectra under the same dynamic change state are fused to obtain a comprehensive dynamic spectrum, including:

[0040] The product of the complexity weight corresponding to each frequency band and the element in each frequency band is used as the local fluctuation element.

[0041] For each dynamic spectrum under each dynamic change state, the sum of the local fluctuation elements with the same position in the same frequency band in multiple dynamic spectra is taken as the comprehensive fluctuation element.

[0042] By combining multiple comprehensive fluctuation elements, a comprehensive dynamic spectrum is obtained.

[0043] Preferably, the frequency division distortion is canceled out by the complementary frequency bands of the first sound-emitting unit and the second sound-emitting unit, including:

[0044] The real-time output audio signals of the first and second sound units are acquired and subjected to spectrum analysis to obtain the frequency band energy distribution corresponding to the output audio signal. The frequency band components that exceed the preset distortion threshold in the frequency band energy distribution are marked to obtain the marked frequency division distortion features.

[0045] In the frequency division distortion feature, the distortion frequency band of each sound unit is determined according to the frequency band coverage range corresponding to each sound unit;

[0046] The energy attenuation rate of the distortion frequency band is calculated using a preset frequency band window to obtain the frequency band overlap and the corresponding energy fluctuation state. The complementary compensation features of each sound-generating unit are extracted based on the frequency band overlap and the corresponding energy fluctuation state.

[0047] Obtain the preset standard frequency band features corresponding to the audio signal, calculate the matching degree between each complementary compensation feature and the preset standard frequency band features, and determine the target matching degree result and the frequency band complementary mode corresponding to the target matching result based on the matching degree calculation result of each complementary compensation feature.

[0048] Obtain the current playback scene corresponding to the output audio signal, determine the compensation weight corresponding to each frequency band complementary mode according to the current playback scene, obtain the feature vector group of the frequency band complementary mode, and determine the comprehensive complementary compensation strategy according to the feature vector group and the corresponding compensation weight.

[0049] Obtain the frequency band parameter adjustment instruction corresponding to the comprehensive complementary compensation strategy, and adjust the output frequency bands of the first sound unit and the second sound unit in a coordinated manner according to the frequency band parameter adjustment instruction to achieve frequency division distortion cancellation.

[0050] A control method for a speaker capable of high and low frequency separation, applicable to the aforementioned control system for a speaker capable of high and low frequency separation, comprising:

[0051] The control component controls the second sound unit to maintain in a low-frequency dominant first mode, controls the first sound unit to maintain in a high-frequency pre-start second mode, and controls the speaker to output audio in a basic crossover mode.

[0052] In response to the real-time spectral complexity of the audio reaching a preset complexity threshold, the adjustment mechanism controls the second sound unit to gradually switch from the first mode to the wideband adaptation mode. The frequency band complementarity of the first sound unit and the second sound unit cancels out the crossover distortion, and the speaker improves the sound quality resolution through dynamic transition mode.

[0053] In response to the high-frequency energy ratio of the audio being stable above a preset fixed threshold, the speaker is controlled to continuously output in high-frequency enhancement mode. Then, the adjustment mechanism controls the first sound unit and the second sound unit to synchronously maintain a third mode of precise frequency band coupling.

[0054] The control component is kept in a real-time monitoring state. The adjustment mechanism controls the first sound unit to remain in the second mode and the second sound unit to remain in the first mode. The output gain of the first sound unit and the second sound unit is reduced simultaneously to control the speaker to standby in a low-power crossover mode.

[0055] Compared with the prior art, the beneficial effects of the present invention are:

[0056] (1) Through multiple control modules, the system can adjust the working mode of the speaker in real time to adapt to different audio content and playback environment, so that the speaker can provide higher quality sound in various audio playback scenarios; and through the high and low frequency separation design, the system can effectively avoid interference between low and high frequencies, ensuring that each sound unit works within its inherent frequency range. When the high frequency energy in the audio is strong, the system can enhance the high frequency output, while when the low frequency signal dominates, the bass unit will work first, improving the clarity and detail of the audio.

[0057] (2) By fusing, comparing and analyzing the audio spectrum, the system can adjust the output according to the characteristics of different audio content, avoiding distortion caused by frequency band mismatch. Real-time spectrum complexity analysis ensures that the system can output high-quality audio stably in complex audio scenarios. Through precise gain control and mode switching, the sound quality is not affected when the speaker is in a low power consumption state. In standby mode, the system will reduce the gain of the sound unit and keep it in a low power crossover mode, thereby reducing unnecessary energy consumption and extending the service life of the device.

[0058] (3) By controlling the gain, frequency band offset and frequency band coupling of the sound unit, the system can achieve more personalized audio output. Users can adjust the sound quality according to different listening preferences, making the speaker more adaptable to different user needs. Moreover, through real-time spectrum analysis and compensation for distorted frequency bands, the system can effectively cancel the frequency division distortion caused by frequency band overlap or other factors during audio playback, ensuring that the audio output is clearer and more natural. Attached Figure Description

[0059] Figure 1 This is a schematic diagram of the overall system architecture in one embodiment of the present invention;

[0060] Figure 2 This is a schematic flowchart of the overall method in one embodiment of the present invention.

[0061] In the diagram: 1. First control module; 2. Second control module; 3. Third control module; 4. Fourth control module. Detailed Implementation

[0062] 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.

[0063] Example 1, please refer to Figure 1The present invention provides a technical solution: a control system for a speaker capable of separating high and low frequencies, the speaker comprising a main body, a sound-generating component, and a control component.

[0064] The sound-generating component includes a first sound-generating unit and a second sound-generating unit respectively disposed on both sides of the main body. The first sound-generating unit and the second sound-generating unit can switch frequency division modes within a preset frequency range under the control of the adjustment mechanism. The control component is disposed inside the main body and is electrically connected to the first sound-generating unit, the second sound-generating unit and the adjustment mechanism respectively.

[0065] The inherent resonant frequency of the first sound-emitting unit is higher than that of the second sound-emitting unit, and the frequency bands of the first and second sound-emitting units have a preset overlap range.

[0066] Control system, including:

[0067] The first control module 1 is used to control the second sound unit to maintain in a low-frequency dominant first mode, control the first sound unit to maintain in a high-frequency pre-start second mode, and control the speaker to output audio in the basic crossover mode.

[0068] The second control module 2 is used to respond to the real-time spectral complexity of the audio reaching a preset complexity threshold. It controls the second sound unit to gradually switch from the first mode to the wideband adaptation mode through the adjustment mechanism. The frequency band complementarity of the first and second sound units cancels out the crossover distortion, and the speaker improves the sound quality resolution through dynamic transition mode.

[0069] The third control module 3 is used to control the speaker to continuously output in high-frequency enhancement mode in response to the high-frequency energy ratio of the audio being stable above a preset fixed threshold. Then, the first sound unit and the second sound unit are controlled to maintain a precise frequency band coupling in the third mode through the adjustment mechanism.

[0070] It should be noted that the first and second sound units are located on opposite sides of the speaker enclosure, and they have different inherent resonant frequencies: the first sound unit has a higher inherent resonant frequency, suitable for outputting high-frequency sounds; while the second sound unit has a lower inherent resonant frequency, suitable for outputting low-frequency sounds. The frequency ranges of these two sound units overlap, meaning they can operate together within a certain range, but their operating modes are switched through an adjustment mechanism. The control system consists of multiple modules that coordinate the operating modes of these two sound units to ensure audio output quality. The main function of the first control module is to maintain the second sound unit's low-frequency output (first mode) and keep the first sound unit at high frequencies (second mode). Simultaneously, the speaker outputs audio in a basic crossover mode, where low and high frequencies are processed using crossover technology. For example, when playing a piece of music, the low-frequency portion is handled by the second sound unit, while the high-frequency portion is handled by the first sound unit. The system is responsible for ensuring clear and layered audio. When the spectral complexity of the audio exceeds a preset threshold, the system switches to a more complex audio processing mode (wideband adaptation mode). Through an adjustment mechanism, the second speaker gradually expands its frequency band coverage to enhance sound resolution and reduce crossover distortion. For example, when playing complex music or high dynamic range audio, the speaker automatically adjusts to make the transition between low and high frequencies smoother and reduce possible sound distortion. When the proportion of high-frequency energy in the audio reaches a certain threshold, the control system automatically adjusts the speaker to enhance the high-frequency output and makes the frequency bands of the first and second speaker units more precisely coupled, achieving a high-frequency enhancement mode (third mode). For example, when the speaker plays certain high-frequency dominant sound effects (such as the high-frequency part of electronic music or sharp notes in vocals), the system enhances the output of the high-frequency part, making the sound quality clearer and ensuring that the audio output on both sides is not distorted, thus improving the overall sound quality.

[0071] In an optional embodiment, the control system further includes:

[0072] The fourth control module 4 is used to control the control components to maintain a real-time monitoring state. It controls the first sound unit to maintain in the second mode and the second sound unit to maintain in the first mode through the adjustment mechanism, and synchronously reduces the output gain of the first sound unit and the second sound unit to control the speaker to standby in low-power crossover mode.

[0073] It should be noted that the control component is always in a real-time monitoring state, meaning the system continuously monitors changes in the audio signal and adjusts accordingly. This ensures the system can dynamically respond to changes in the audio signal without switching modes too frequently, thus avoiding resource waste. In this mode, the adjustment mechanism controls the operating state of the first and second sound units. Specifically, the first sound unit remains in the previously described second mode (high-frequency pre-start mode), and the second sound unit remains in the previously described first mode (low-frequency dominant mode). Simultaneously, the fourth control module reduces the output gain of both sound units. Gain refers to the volume or intensity of the audio output. By reducing the gain, the speaker's output sound becomes softer, reducing energy consumption. When the gain is reduced, the speaker enters a low-power standby state. This means the speaker still maintains its audio signal processing capability, but the volume and power consumption are significantly reduced, making it suitable for scenarios where long-term standby is desired without wasting power.

[0074] In an optional embodiment, after the speaker is controlled to continuously output in a high-frequency enhancement mode, the control system further includes:

[0075] The output characteristics of the speaker are controlled by the state changes of the first and second sound-emitting units; wherein, controlling the output characteristics of the speaker by the state changes of the first and second sound-emitting units includes:

[0076] The sound image localization of the speaker is controlled by controlling the gain difference between the first and second sound units.

[0077] The warmth or coolness of the speaker's tone can be controlled by adjusting the crossover point of the first and / or second sound units upward or downward within a preset frequency range.

[0078] It's important to note that gain difference refers to the difference in the strength of the audio signals output by two sound-producing units (such as a woofer and a tweeter). By adjusting the gain difference between these two units, the spatial positioning of the sound can be controlled, i.e., sound image positioning. Sound image positioning determines the direction from which the sound comes. For example, if the first sound-producing unit (tweeter) has a higher gain and the second sound-producing unit (woofer) has a lower gain, the sound will sound biased towards the tweeter, giving the impression that the sound is coming from above or in front. Conversely, if the woofer has a higher gain and the tweeter has a lower gain, the sound will sound biased towards the woofer, giving the impression that the sound is coming from below or behind. By finely adjusting the gain difference, virtual positioning control of the audio sound field can be achieved, changing the spatial perception of the sound and allowing the speakers to produce different auditory effects during playback. This is especially important in surround sound systems or high-end audio systems. Crossover point refers to... The crossover point is the dividing point between low-frequency and high-frequency signals in an audio signal. Typically, the woofer and tweeter units separate the audio signal via a crossover, each handling a different frequency range. Adjusting the crossover point (i.e., shifting the crossover point) can affect the warmth or coolness of the speaker's tone: the warmth or coolness of the tone is related to the frequency distribution and response. Generally, low frequencies (such as frequencies below approximately 100Hz) give a feeling of "warmth" or "thickness," while high frequencies (such as frequencies above 5kHz) make the sound sound "colder" or "brighter." For example, shifting the crossover point upwards means that more low frequencies are transferred to the tweeter, requiring the tweeter to handle more low-frequency signals, thus making the sound sound "brighter" and "clearer." Shifting the crossover point downwards means that more low-frequency signals are handled by the woofer, thus making the sound sound "warmer" or "thicker."

[0079] In an optional embodiment, controlling the speaker to output audio in a fundamental crossover mode includes:

[0080] The control components are kept in spectrum analysis mode, and the first sound unit is kept in the second mode to cancel low-frequency harmonic interference.

[0081] The control speaker continuously outputs in high-frequency enhancement mode, including:

[0082] Control the second sound unit to reduce low-frequency gain in order to reduce frequency band overlap interference.

[0083] It's important to note that spectrum analysis mode refers to the system continuously monitoring the audio signal's spectrum by analyzing the frequency distribution of the input signal, ensuring that the sound output is not affected by unwanted frequency interference. Through this mode, the system can determine the spectral characteristics of the signal in real time, especially the low-frequency components, ensuring a clear and interference-free signal output. For example, suppose you hear a rock song with very strong bass guitar and drum beats. In some audio signals, low-frequency harmonics (such as "resonance" or distortion in the bass) can interfere with high-frequency effects, such as the clarity of the guitar's high notes. By setting the tweeter (the first sound unit) to a certain mode, it can appropriately reduce or cancel these low-frequency harmonics, ultimately making the high frequencies clearer and more delicate without being contaminated by low frequencies. High-frequency enhancement mode means enhancing the high-frequency components by adjusting system settings. The bass unit's output makes high-frequency sounds more prominent, clear, and bright. This is usually done to enhance the detail and spatial feel of the sound, especially when the high frequencies of vocals or instruments need to be emphasized in the audio. For example, if the bass unit's output is too strong, it may overlap with high frequencies (such as vocals or the high notes of a violin), resulting in a muddy or dull overall sound quality. By reducing the bass gain, the high frequencies can be made more prominent, and interference between low and high frequencies can be avoided. For example, when playing a symphony, the bass part of the audio system may overlap with the high frequencies (such as the crisp sound of strings or woodwind instruments), causing the high-frequency sound to be covered by the low frequencies and lose its clarity. In this case, reducing the bass unit's gain can effectively reduce this interference, making the high-frequency sound more prominent and exhibiting a brighter and more delicate sound quality.

[0084] In an optional embodiment, the control system further includes:

[0085] In response to the speaker being in the basic crossover mode, the high-frequency gain of the first sound unit is controlled to be greater than the high-frequency gain of the second sound unit.

[0086] In response to the speaker being in a dynamic transition mode, the gain adjustment rate of the first sound unit is controlled to be equal to the gain adjustment rate of the second sound unit.

[0087] It's important to note that the basic crossover mode refers to the frequency division operation mode of an audio system. The "crossover" in an audio system is responsible for distributing different frequency components of the input signal to different drivers (such as woofers and tweeters). In the basic crossover mode, the system allocates low-frequency and high-frequency signals according to a predetermined frequency range, ensuring that the low-frequency and high-frequency sound outputs do not interfere with each other. In this mode, the first driver typically handles high frequencies (such as the tweeter), while the second driver handles low frequencies. High-frequency gain refers to the amplification of the high-frequency signal. In the basic crossover mode, to ensure the prominence of the high frequencies, the high-frequency gain is greater than the high-frequency gain of the low-frequency driver. This enhances the performance of the high frequencies, making them clearer and brighter. Dynamic transition mode is used when the audio system is dynamically adjusted, especially in scenarios where there are significant changes in volume or frequency response; for example, changes in volume levels or transitions of the audio signal from one frequency band to another. In frequency bands, the system needs to adjust the gain in real time to avoid sound distortion or imbalance. The gain adjustment rate refers to how quickly the audio system adjusts the audio gain when the signal strength changes. In dynamic transition mode, the audio system ensures that the gain adjustment rates of the first sound unit (high frequency unit) and the second sound unit (low frequency unit) are consistent. In this way, when the signal changes, the gain changes of low frequency and high frequency will remain synchronized, avoiding abrupt changes in frequency response and ensuring a smooth sound transition. For example, suppose you are listening to a piece of music with a dramatic transition, such as from a gentle piano piece to intense electronic music. In dynamic transition mode, when the volume or frequency components change drastically, the system will synchronously adjust the gain of the high and low frequency units to ensure that their gain adjustment rates are equal. For example, when the low frequency part of electronic music suddenly increases, the system will quickly adjust the gain of low frequency and high frequency, so that the frequency response change of the entire audio system transitions smoothly, rather than making the low frequency or high frequency part too prominent, resulting in sound quality imbalance.

[0088] In an optional embodiment, the first sound-emitting unit and the second sound-emitting unit are symmetrically arranged along the acoustic center of the main body. The main body also includes an internal signal processing board, the central axis of which is collinear with the line of symmetry of the first sound-emitting unit and the second sound-emitting unit, and the control components are integrated on the signal processing board.

[0089] It should be noted that the first and second sound units are symmetrically arranged along the acoustic center in the speaker's structure, ensuring balanced sound effects from the left and right audio channels. This symmetrical arrangement ensures that the sound waves propagate in the same direction, resulting in even sound distribution on both sides and reducing sound distortion and imbalance. The signal processing board integrates audio signal processing circuitry, including functions such as audio signal amplification, filtering, and gain adjustment. It is responsible for processing the input audio signal and transmitting it to the corresponding sound units, ensuring that the speaker can reproduce clear and accurate sound effects. The central axis of the signal processing board is collinear with the symmetry line of the sound units, meaning that the layout of the signal processing board is strictly symmetrical, located in the center of the speaker, and its axis (i.e., the "center line" of the circuit board) is aligned with the symmetry line of the two sound units. This design aims to ensure more precise signal processing and distribution, reducing audio distortion caused by offset or asymmetry. The control components refer to the adjustment and control circuitry in the speaker system, including functions such as gain adjustment, frequency response adjustment, and sound effect settings. The control components are integrated with the signal processing board, resulting in a more compact overall layout. This design reduces system complexity, saves space, and improves system response speed and stability.

[0090] In an optional embodiment, the method for calculating the real-time spectral complexity of audio includes:

[0091] Acquire multiple characteristic signals of audio under a reference state and under various dynamic changing states, wherein the characteristic signals include at least two of the following: time-domain waveform signal, frequency-domain distribution signal, energy fluctuation signal, and harmonic component signal;

[0092] Obtain the spectrum of the characteristic signal under each dynamic change state to obtain the dynamic spectrum; obtain the spectrum of the characteristic signal under the reference state to obtain the reference spectrum; divide the spectrum into frequency bands.

[0093] Calculate the frequency band fluctuation of the dynamic spectrum and the reference spectrum in different frequency bands;

[0094] The complexity weights of different characteristic signals in each frequency band under various dynamic states are determined based on the frequency band fluctuation. This determination includes:

[0095] The sum of the frequency band fluctuations corresponding to different characteristic signals is taken as the total fluctuation amount;

[0096] For each dynamic change state, the ratio of the frequency band fluctuation of any feature signal in any frequency band to the total fluctuation is used as the complexity weight of the feature signal in the frequency band.

[0097] Based on the complexity weight, the same frequency bands in multiple dynamic spectra under the same dynamic change state are fused to obtain the comprehensive dynamic spectrum;

[0098] The dynamic spectrum of multiple frequency bands is connected to obtain the dynamic fused spectrum; multiple characteristic signals during audio playback are acquired in real time, and the real-time dynamic spectrum is obtained; the frequency bands of multiple real-time dynamic spectra are fused to obtain the real-time fused spectrum; the differences between each dynamic fused spectrum and the real-time fused spectrum are compared to obtain the spectrum similarity.

[0099] The complexity score is calculated based on spectral similarity, and the real-time spectral complexity of the audio is determined based on the complexity score.

[0100] It should be noted that in the process of analyzing audio, it is first necessary to obtain multiple characteristic signals of the audio. These signals can be: time-domain waveform signals: the waveform of the audio signal on the time axis, describing the change of sound intensity over time; frequency-domain distribution signals: the energy distribution of the audio signal in different frequency ranges, usually obtained through Fourier transform; energy fluctuation signals: the fluctuation of the audio signal's energy, reflecting changes in the audio's intensity; harmonic component signals: multiple frequency components contained in the audio, among which the dominant frequency and its harmonics affect the sound quality. At least two of these characteristic signals will be extracted and analyzed to comprehensively describe the characteristics of the audio. Next, it is necessary to calculate the spectrum (i.e., frequency domain information) for each dynamic state, including: dynamic... The spectrum refers to the spectral information of an audio signal under different states. These states could be different moments during audio playback, different emotions, or different operations (such as volume changes, rhythm changes, etc.). The reference spectrum, as the spectrum in a standard initial state, could be the spectrum at the beginning of audio playback or the spectrum in a static state. The spectrum is divided into multiple frequency bands (e.g., low-frequency, mid-frequency, high-frequency bands) to allow for separate analysis of changes in different bands. It describes the degree of fluctuation of audio within a certain frequency band; the greater the fluctuation, the more drastic the signal change in that band. For example, if the energy fluctuation of the audio signal is large in the low-frequency band, it indicates that the low-frequency changes are more significant. The fluctuation of each dynamic spectrum and the reference spectrum in different frequency bands is calculated. By comparing their changes, we can understand the complexity of audio across different frequency bands. Based on the frequency band volatility, we can calculate the "complexity weight" of the characteristic signal in each dynamic state across different frequency bands. The complexity weight describes the importance of a characteristic signal within a certain frequency band. Frequency bands with greater volatility may have higher complexity weights because their changes in audio are more significant. The complexity weight is calculated as a proportion of the frequency band volatility; for example, if the volatility of the low-frequency band accounts for 30% of the total volatility, then the complexity weight of that frequency band is 30%. For multiple dynamic spectra under the same dynamic change state, we fuse them according to the complexity weights of each frequency band to obtain a comprehensive dynamic spectrum. Through this fusion, we can comprehensively consider the complexity of all frequency bands. The process involves: analyzing the changes and removing redundant information; stitching together the combined dynamic spectra of all frequency bands to obtain a complete dynamic spectrum; containing information about the dynamic changes of audio across different frequency bands; during audio playback, real-time acquisition of audio characteristic signals and generation of a real-time dynamic spectrum; comparing this spectrum with previously generated dynamic fusion spectra to determine their differences, i.e., spectral similarity; measuring the similarity between the real-time dynamic spectrum and historical dynamic spectra; a high similarity indicates that the characteristics of the real-time audio are similar to previous audio states; a low similarity indicates that the characteristics of the audio have changed significantly; and calculating a complexity score based on spectral similarity, reflecting the spectral complexity of the real-time audio; a higher spectral similarity results in a lower complexity score.A lower spectral similarity and a higher complexity score indicate that the audio's spectral variations are more complex.

[0101] In an optional embodiment, calculating the frequency band fluctuation of the dynamic spectrum and the reference spectrum in different frequency bands includes:

[0102] For each dynamic spectrum under each dynamic change state, obtain the fluctuation difference of the elements with the same position in the same frequency band of the dynamic spectrum and the reference spectrum.

[0103] The sum of the squares of the fluctuation differences corresponding to all elements in the frequency band is taken as the frequency band fluctuation.

[0104] Based on complexity weights, the same frequency bands in multiple dynamic spectra under the same dynamic change state are fused to obtain a comprehensive dynamic spectrum, including:

[0105] The product of the complexity weight corresponding to each frequency band and the element in each frequency band is used as the local fluctuation element.

[0106] For each dynamic spectrum under each dynamic change state, the sum of the local fluctuation elements with the same position in the same frequency band in multiple dynamic spectra is taken as the comprehensive fluctuation element.

[0107] By combining multiple comprehensive fluctuation elements, a comprehensive dynamic spectrum is obtained.

[0108] It should be noted that for each dynamic spectrum under each dynamic change state, it is first necessary to compare it with the reference spectrum, especially the spectral elements (i.e., spectral values) at the same frequency band and position (position). The fluctuation difference between the dynamic spectrum and the reference spectrum at the same frequency band and position is then calculated. In other words, for each frequency position in each frequency band, the difference between the dynamic and reference states is calculated. For example, in a 100Hz frequency band, if the reference spectrum value is 10 and the dynamic spectrum value is 12, then the fluctuation difference between them is... The answer is 2. Next, the fluctuation difference of all spectral elements in each frequency band is squared and summed to obtain the fluctuation of that frequency band. The fluctuation difference refers to the difference between the dynamic spectrum and the reference spectrum at each frequency point in the same frequency band. The fluctuation of each frequency band reflects the degree of fluctuation of that frequency band under dynamic conditions. The greater the fluctuation, the more drastic the change in this frequency band. For a certain frequency band, such as the 100Hz to 200Hz band, the fluctuation difference of all frequency positions (such as 100Hz, 150Hz, 200Hz) in that frequency band is calculated, and these differences are obtained. The sum of squares is used to obtain the volatility of the frequency band. By introducing complexity weights, multiple dynamic spectra under the same dynamic change state are fused. The complexity weights reflect the importance of different frequency bands in the overall audio analysis. For each frequency band in each dynamic spectrum, the complexity weight of the frequency band is multiplied by the value of each element (frequency position) in the frequency band to obtain the local volatility element. The role of this local volatility element is to measure the importance of the frequency band in the entire spectrum. For all dynamic spectra, the local volatility elements of the same position (same frequency position) in each frequency band are summed. This summation result is the comprehensive volatility element of the frequency band. The local volatility element refers to the result of multiplying each frequency band element in a single dynamic spectrum with its corresponding complexity weight. The comprehensive volatility element is the sum of the local volatility elements of the same position in multiple dynamic spectra. It reflects the fusion effect of multiple dynamic spectra under this frequency band. Finally, the comprehensive volatility elements of all frequency bands are combined to obtain the final comprehensive dynamic spectrum. This comprehensive spectrum will include the spectral change information of all dynamic states of audio and is a comprehensive audio feature representation.

[0109] In an optional embodiment, frequency division distortion is canceled out by the complementary frequency bands of the first and second sound-emitting units, including:

[0110] The real-time output audio signals of the first and second sound units are acquired and subjected to spectrum analysis to obtain the frequency band energy distribution corresponding to the output audio signal. The frequency band components that exceed the preset distortion threshold in the frequency band energy distribution are marked to obtain the marked frequency division distortion features.

[0111] In the frequency division distortion characteristics, the distortion frequency band of each sound unit is determined according to the frequency band coverage range corresponding to each sound unit;

[0112] The energy attenuation rate of the distortion frequency band is calculated using a preset frequency band window to obtain the frequency band overlap and the corresponding energy fluctuation state. The complementary compensation features of each sound unit are extracted based on the frequency band overlap and the corresponding energy fluctuation state.

[0113] Obtain the preset standard frequency band features corresponding to the audio signal, calculate the matching degree between each complementary compensation feature and the preset standard frequency band features, and determine the target matching degree result and the frequency band complementary mode corresponding to the target matching result based on the matching degree calculation result of each complementary compensation feature.

[0114] Obtain the current playback scene corresponding to the output audio signal, determine the compensation weight corresponding to each frequency band complementary mode based on the current playback scene, obtain the feature vector group of the frequency band complementary mode, and determine the comprehensive complementary compensation strategy based on the feature vector group and the corresponding compensation weight.

[0115] Obtain the frequency band parameter adjustment command corresponding to the comprehensive complementary compensation strategy, and adjust the output frequency bands of the first and second sound units in a coordinated manner according to the frequency band parameter adjustment command to achieve frequency division distortion cancellation.

[0116] It should be noted that real-time audio signals are acquired from the first and second sound-generating units, representing the output of the two audio sources during playback. Spectral analysis is performed on these audio signals, converting them into frequency components to examine the energy distribution across various frequency bands (low, mid, and high). This analysis helps understand which frequency bands have higher and lower energy. Based on the analysis results, the energy distribution of the output audio signal across each frequency band is obtained. Next, based on a preset distortion threshold, frequency components exceeding the threshold are identified, as these components may cause distortion. These frequency bands exceeding the threshold are marked as frequency-specific distortion features for subsequent processing. For example, assuming the audio signal is between 100Hz and 500Hz... Excessive energy fluctuations occur within a certain frequency band, exceeding a preset distortion threshold; this energy is then identified as a distortion component. Based on the frequency band coverage of each speaker unit (i.e., their operating frequency range), the distortion frequency band generated by each speaker unit is determined. Specifically, if the distortion characteristics of a certain frequency band mainly originate from a single speaker unit, then that frequency band is considered the distortion frequency band of that speaker unit. For example, assuming the first speaker unit primarily handles low frequencies, while the second speaker unit handles mid-to-high frequencies; if the 100Hz distortion mainly originates from the first speaker unit, then this frequency band belongs to the distortion frequency band of the first speaker unit. The energy attenuation rate of each distortion frequency band is calculated using a preset frequency band window. Simply put, energy attenuation... The rate measures the speed at which the energy in a frequency band decays during playback. Next, the overlap between frequency bands is calculated, i.e., the degree of overlap between two frequency bands in time or frequency. Furthermore, the energy fluctuation state is analyzed, i.e., the energy changes within the frequency band. Based on this information, complementary compensation features for each sound unit are extracted. For example, if the high-frequency portion of the second sound unit and the low-frequency portion of the first sound unit overlap to some extent, then their overlap is high. For these overlapping frequency bands, their energy fluctuations can be further analyzed to determine how to make complementary adjustments. By comparing the characteristics of the current audio signal with the preset standard frequency band characteristics, the matching degree between each complementary compensation feature and the standard frequency band characteristics is calculated. If a certain complementary compensation feature matches the standard... A high feature matching degree indicates that the frequency band characteristics of the speaker unit are close to the standard requirements. Based on the matching degree, a "frequency band complementarity mode" can be determined, that is, which frequency bands need to compensate for each other to optimize the audio effect. For example, if a high-frequency band is severely distorted in the second speaker unit, while the standard features indicate that the frequency band should be smooth and clear, then the complementarity mode for this distorted frequency band is to adjust the output of the second speaker unit to reduce the energy fluctuation of the frequency band to achieve the optimization effect. Each audio signal may be played in a different scenario, such as a concert, movie sound effects, or music playback. Based on these different playback scenarios, a compensation weight will be assigned to each frequency band complementarity mode, that is, the compensation intensity of a certain frequency band will be determined according to the importance of the playback scenario.For example, in a movie scene, low frequencies (such as explosions) might be more important, while in music playback, high frequencies (such as treble clefs) might require more attention. Therefore, the compensation weights for low and high frequencies will differ depending on the playback scenario. Ultimately, a comprehensive complementary compensation strategy will be derived, which determines how to adjust the frequency band output of each sound unit to achieve optimal audio performance. Based on this strategy, corresponding frequency band parameter adjustment instructions are generated, instructing how to collaboratively adjust the frequency bands of the first and second sound units to reduce distortion and optimize sound quality. For example, assuming the second sound unit has severe high-frequency distortion and a high compensation weight for high frequencies in the current scenario, the adjustment instructions might require enhancing the high-frequency output of that sound unit or reducing the frequency band overlap between the first and second sound units to reduce distortion. Through the aforementioned frequency band parameter adjustment instructions, the first and second sound units will be collaboratively adjusted to optimize their output in specific frequency bands, thereby effectively canceling out crossover distortion and ultimately achieving clear and high-quality audio output.

[0117] Example 2, please refer to Figure 2 This invention provides a technical solution: a control method for a speaker capable of separating high and low frequencies, applicable to the control system of the aforementioned speaker capable of separating high and low frequencies, comprising:

[0118] S1. Control the second sound unit to maintain in the first mode dominated by low frequency through the control component, control the first sound unit to maintain in the second mode of high frequency pre-start, and control the speaker to output audio in the basic crossover mode.

[0119] S2. In response to the real-time spectral complexity of the audio reaching a preset complexity threshold, the second sound unit is controlled by the adjustment mechanism to gradually switch from the first mode to the wideband adaptation mode. The frequency band complementarity of the first and second sound units cancels the crossover distortion, and the speaker improves the sound quality resolution through dynamic transition mode.

[0120] S3. In response to the high-frequency energy ratio of the audio being stable above a preset fixed threshold, the speaker is controlled to continuously output in high-frequency enhancement mode. Then, the first and second sound units are controlled to maintain a precise frequency band coupling in the third mode through the adjustment mechanism.

[0121] S4. The control components are kept in real-time monitoring state. The adjustment mechanism controls the first sound unit to maintain in the second mode and the second sound unit to maintain in the first mode. The output gain of the first sound unit and the second sound unit is reduced simultaneously to control the speaker to standby in low-power crossover mode.

[0122] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A control system for a speaker capable of separating high and low frequencies, applied to a speaker, characterized in that, The speaker includes a main body, a sound-generating component, and a control component; The sound-generating component includes a first sound-generating unit and a second sound-generating unit respectively disposed on both sides of the main body. The first sound-generating unit and the second sound-generating unit can switch frequency division modes within a preset frequency range under the control of the adjustment mechanism. The control component is disposed inside the main body and is electrically connected to the first sound-generating unit, the second sound-generating unit and the adjustment mechanism respectively. Wherein, the inherent resonant frequency of the first sound-emitting unit is higher than that of the second sound-emitting unit, and the frequency bands of the first sound-emitting unit and the second sound-emitting unit have a preset overlap range. The control system includes: The first control module is used to control the second sound unit to maintain in a low-frequency dominant first mode, control the first sound unit to maintain in a high-frequency pre-start second mode, and control the speaker to output audio in a basic crossover mode. The second control module is used to respond to the real-time spectral complexity of the audio reaching a preset complexity threshold, and control the second sound unit to gradually switch from the first mode to the wideband adaptation mode through the adjustment mechanism. The frequency band complementarity of the first sound unit and the second sound unit cancels the crossover distortion, and the speaker improves the sound quality resolution through dynamic transition mode. The third control module is used to control the speaker to continuously output in high-frequency enhancement mode in response to the high-frequency energy ratio of the audio being stable above a preset fixed threshold. Then, the adjustment mechanism controls the first sound unit and the second sound unit to synchronously maintain a third mode of precise frequency band coupling.

2. The control system for a speaker capable of separating high and low frequencies according to claim 1, characterized in that, The control system further includes: The fourth control module is used to control the control components to maintain a real-time monitoring state, and to control the first sound unit to maintain in the second mode and the second sound unit to maintain in the first mode through the adjustment mechanism, and to simultaneously reduce the output gain of the first sound unit and the second sound unit, so as to control the speaker to standby in a low-power crossover mode.

3. The control system for a speaker capable of separating high and low frequencies according to claim 2, characterized in that, After controlling the speaker to continuously output in high-frequency enhancement mode, the control system further includes: The output characteristics of the speaker are controlled by the state changes of the first sound-emitting unit and the second sound-emitting unit; wherein, controlling the output characteristics of the speaker by the state changes of the first sound-emitting unit and the second sound-emitting unit includes: The sound image localization of the speaker is controlled by controlling the gain difference between the first sound-producing unit and the second sound-producing unit; The warmth or coolness of the speaker's tone can be controlled by adjusting the crossover point of the first and / or second sound-generating units upward or downward within a preset frequency range.

4. The control system for a speaker capable of separating high and low frequencies according to claim 3, characterized in that, Controlling the speaker to output audio in a basic crossover mode includes: The control component is kept in spectrum analysis state, and the first sound unit is kept in the second mode to cancel low-frequency harmonic interference. Controlling the speaker to continuously output in high-frequency enhancement mode includes: The second sound unit is controlled to reduce low-frequency gain in order to reduce frequency band overlap interference.

5. The control system for a speaker capable of separating high and low frequencies according to claim 4, characterized in that, The control system further includes: In response to the speaker being in the basic crossover mode, the high-frequency gain of the first sound-emitting unit is controlled to be greater than the high-frequency gain of the second sound-emitting unit; In response to the speaker being in a dynamic transition mode, the gain adjustment rate of the first sound-emitting unit is controlled to be equal to the gain adjustment rate of the second sound-emitting unit.

6. The control system for a speaker capable of separating high and low frequencies according to claim 5, characterized in that, The first sound-emitting unit and the second sound-emitting unit are symmetrically arranged along the acoustic center of the main body. The main body also includes an internal signal processing board. The central axis of the signal processing board is collinear with the line of symmetry of the first sound-emitting unit and the second sound-emitting unit. The control component is integrated on the signal processing board.

7. The control system for a speaker capable of separating high and low frequencies according to claim 6, characterized in that, The method for calculating the real-time spectral complexity of the audio includes: The audio signal is acquired under a reference state and under various dynamic changing states, wherein the characteristic signal includes at least two of the following: time-domain waveform signal, frequency-domain distribution signal, energy fluctuation signal, and harmonic component signal. The spectrum of the characteristic signal under each dynamic change state is obtained to obtain the dynamic spectrum; the spectrum of the characteristic signal under the reference state is obtained to obtain the reference spectrum; and the frequency bands of the spectrum are divided. Calculate the frequency band fluctuation of the dynamic spectrum and the reference spectrum in different frequency bands; Determining the complexity weights of different characteristic signals in each frequency band under each dynamic change state based on the frequency band fluctuation; wherein, determining the complexity weights of different characteristic signals in each frequency band under each dynamic change state based on the frequency band fluctuation includes: The sum of the frequency band fluctuations corresponding to different characteristic signals is taken as the total fluctuation amount; For each dynamic change state, the ratio of the frequency band fluctuation of any feature signal in any frequency band to the total fluctuation is used as the complexity weight of the feature signal in that frequency band. Based on the complexity weight, the same frequency bands in multiple dynamic spectra under the same dynamic change state are fused to obtain the comprehensive dynamic spectrum; The dynamic spectrum of multiple frequency bands is connected to obtain the dynamic fused spectrum; multiple characteristic signals during audio playback are acquired in real time, and the real-time dynamic spectrum is obtained; the frequency bands of multiple real-time dynamic spectra are fused to obtain the real-time fused spectrum; the differences between each dynamic fused spectrum and the real-time fused spectrum are compared to obtain the spectrum similarity. The complexity score is calculated based on spectral similarity, and the real-time spectral complexity of the audio is determined based on the complexity score.

8. The control system for a speaker capable of separating high and low frequencies according to claim 7, characterized in that, Calculating the frequency band fluctuation of the dynamic spectrum and the reference spectrum in different frequency bands includes: For each dynamic spectrum under each dynamic change state, obtain the fluctuation difference of the elements with the same position in the same frequency band of the dynamic spectrum and the reference spectrum. The sum of the squares of the fluctuation differences corresponding to all elements in the frequency band is taken as the frequency band fluctuation. Based on complexity weights, the same frequency bands in multiple dynamic spectra under the same dynamic change state are fused to obtain a comprehensive dynamic spectrum, including: The product of the complexity weight corresponding to each frequency band and the element in each frequency band is used as the local fluctuation element. For each dynamic spectrum under each dynamic change state, the sum of the local fluctuation elements with the same position in the same frequency band in multiple dynamic spectra is taken as the comprehensive fluctuation element. By combining multiple comprehensive fluctuation elements, a comprehensive dynamic spectrum is obtained.

9. A control system for a speaker capable of separating high and low frequencies according to claim 8, characterized in that, Frequency division distortion is canceled out by the complementary frequency bands of the first and second sound-generating units, including: The real-time output audio signals of the first and second sound units are acquired and subjected to spectrum analysis to obtain the frequency band energy distribution corresponding to the output audio signal. The frequency band components that exceed the preset distortion threshold in the frequency band energy distribution are marked to obtain the marked frequency division distortion features. In the frequency division distortion feature, the distortion frequency band of each sound unit is determined according to the frequency band coverage range corresponding to each sound unit; The energy attenuation rate of the distortion frequency band is calculated using a preset frequency band window to obtain the frequency band overlap and the corresponding energy fluctuation state. The complementary compensation features of each sound-generating unit are extracted based on the frequency band overlap and the corresponding energy fluctuation state. Obtain the preset standard frequency band features corresponding to the audio signal, calculate the matching degree between each complementary compensation feature and the preset standard frequency band features, and determine the target matching degree result and the frequency band complementary mode corresponding to the target matching result based on the matching degree calculation result of each complementary compensation feature. Obtain the current playback scene corresponding to the output audio signal, determine the compensation weight corresponding to each frequency band complementary mode according to the current playback scene, obtain the feature vector group of the frequency band complementary mode, and determine the comprehensive complementary compensation strategy according to the feature vector group and the corresponding compensation weight. Obtain the frequency band parameter adjustment instruction corresponding to the comprehensive complementary compensation strategy, and adjust the output frequency bands of the first sound unit and the second sound unit in a coordinated manner according to the frequency band parameter adjustment instruction to achieve frequency division distortion cancellation.

10. A control method for a speaker capable of high and low frequency separation, applicable to the control system of a speaker capable of high and low frequency separation as described in any one of claims 1-9, characterized in that, include: The control component controls the second sound unit to maintain in a low-frequency dominant first mode, controls the first sound unit to maintain in a high-frequency pre-start second mode, and controls the speaker to output audio in a basic crossover mode. In response to the real-time spectral complexity of the audio reaching a preset complexity threshold, the adjustment mechanism controls the second sound unit to gradually switch from the first mode to the wideband adaptation mode. The frequency band complementarity of the first sound unit and the second sound unit cancels out the crossover distortion, and the speaker improves the sound quality resolution through dynamic transition mode. In response to the high-frequency energy ratio of the audio being stable above a preset fixed threshold, the speaker is controlled to continuously output in high-frequency enhancement mode. Then, the adjustment mechanism controls the first sound unit and the second sound unit to synchronously maintain a third mode of precise frequency band coupling. The control component is kept in a real-time monitoring state. The adjustment mechanism controls the first sound unit to remain in the second mode and the second sound unit to remain in the first mode. The output gain of the first sound unit and the second sound unit is reduced simultaneously to control the speaker to standby in a low-power crossover mode.

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