A speaker system and a control method thereof

Abstract

The embodiment of the present specification provides a loudspeaker system and a control method thereof, the system comprising a bass module, a mid-high frequency module, a near-field microphone module, a far-field microphone module, a mainboard module and a scattering plate module, the bass module and the mid-high frequency module are arranged beside each other, the bass module is configured to emit low-frequency sound waves laterally outward, and the mid-high frequency module is configured to emit mid-high frequency sound waves laterally outward; the near-field microphone module is configured to collect sound signals in a near-field range, and the far-field microphone module is configured to collect sound signals in a far-field range; the mainboard module is configured with an audio processing unit, the audio processing unit is configured to perform sound effect optimization on input audio; and the scattering plate module is configured to scatter low-frequency sound waves and mid-high frequency sound waves emitted by the bass module and the mid-high frequency module outward.

Description

Technical Field

[0001] This specification relates to the field of audio technology, and in particular to a loudspeaker system and its control method. Background Technology

[0002] As the demands for sound field coverage and visual aesthetics in residential and commercial spaces continue to increase, single-unit loudspeaker systems are gaining popularity due to their compact structure and ease of installation. However, achieving a wide, uniform, and comfortable sound field coverage within a thin and light enclosure, while maintaining a single sound source structure, has become a key technical challenge.

[0003] Existing single-unit loudspeakers generally face the following acoustic limitations: sound energy attenuates rapidly with increasing distance, resulting in insufficient volume in the far field; at the same time, the near-field sound pressure level is too high, which can easily make listeners feel oppressed and even interfere with normal speech communication, affecting the listening experience. In addition, their appearance design is often difficult to coordinate with diverse interior decoration styles.

[0004] Therefore, there is an urgent need for a loudspeaker system and its control system that, while maintaining a single-box, thin and aesthetically pleasing design, can achieve a more uniform and comfortable sound coverage effect in a large space by making reasonable use of the sound wave propagation path and combining real-time perception and adjustment of the sound pressure level at different listening distances, thus taking into account both far-field listening clarity and near-field listening comfort. Summary of the Invention

[0005] This specification provides one or more embodiments of a loudspeaker system, including a bass module, a mid-high frequency module, a near-field microphone module, a far-field microphone module, a mainboard module, and a diffuser module. The bass module and the mid-high frequency module are located beside each other. The bass module is configured to emit low-frequency sound waves laterally outward, and the mid-high frequency module is configured to emit mid-high frequency sound waves laterally outward. The near-field microphone module is configured to collect sound signals in the near-field range, and the far-field microphone module is configured to collect sound signals in the far-field range. The mainboard module is equipped with an audio processing unit configured to optimize the sound effects of the input audio. The diffuser module is configured to scatter the low-frequency sound waves and the mid-high frequency sound waves emitted by the bass module and the mid-high frequency module outward.

[0006] This specification provides one or more embodiments of a speaker system control method, comprising: acquiring the near-field sound loudness of a sound signal in the near-field range collected by a near-field microphone module; controlling a bass module to reduce the output gain of the low-frequency band of the input audio in response to the near-field sound loudness exceeding a preset near-field threshold; or, acquiring the far-field sound loudness of a sound signal in the far-field range collected by a far-field microphone module; and controlling a mid-high frequency module to increase the output gain of the mid-frequency band of the input audio in response to the far-field sound loudness being lower than a preset far-field threshold.

[0007] This specification provides one or more embodiments of a computer-readable storage medium that stores computer instructions. When a computer reads the computer instructions from the storage medium, the computer executes a control method for a speaker system. Attached Figure Description

[0008] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0009] Figure 1A These are schematic diagrams illustrating application scenarios of the loudspeaker system according to some embodiments of this specification; Figure 1B These are exemplary schematic diagrams of loudspeaker systems according to some embodiments of this specification; Figure 2A This is a system schematic diagram of a loudspeaker system according to some embodiments of this specification; Figure 2B This is another system schematic diagram of a loudspeaker system according to some embodiments of this specification; Figure 2C yes Figure 2B A perspective view of the loudspeaker system in the image; Figure 3 These are exemplary schematic diagrams illustrating the processing of input audio based on environmental compensation parameters according to some embodiments of this specification; Figure 4 This is an exemplary schematic diagram illustrating the adjustment of output gain according to some embodiments of this specification; Figure 5 This is an exemplary flowchart of a control method for a loudspeaker system according to some embodiments of this specification. Detailed Implementation

[0010] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0011] It should be understood that the terms “system,” “device,” “unit,” and / or “module” used herein are one way to distinguish different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0012] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0013] Flowcharts are used in this specification to illustrate the operations performed by the system according to embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0014] Figure 1A This is a schematic diagram illustrating the application scenarios of a loudspeaker system according to some embodiments of this specification. Figure 1B This is an exemplary schematic diagram of a loudspeaker system according to some embodiments of this specification.

[0015] Some embodiments of this specification provide a loudspeaker system suitable for indoor sound reinforcement scenarios with high requirements for sound field coverage, spatial aesthetics, and usage flexibility. It is particularly suitable for spaces where multi-point distributed speaker layouts are not feasible and ceiling speaker installation is prohibited, enabling uniform and comfortable wide-area sound field reproduction. For example, it can be applied to single-speaker, slim and lightweight applications in commercial and public spaces, office and meeting environments, and residential and smart home spaces.

[0016] like Figure 1A and Figure 1BAs shown, the speaker system 100 includes a first side 101, a second side 102, a third side 103, a fourth side 104, and a front panel 105. The speaker system 100 also includes a rear panel opposite the front panel 105, which is not shown. Figure 1A and 1B In the middle. The first side portion 101 and the third side portion 103 are arranged opposite each other along a first direction. The second side portion 102 and the fourth side portion 104 are arranged opposite each other along a second direction. The front side portion 105 and the back side portion are arranged opposite each other along a third direction.

[0017] In such Figure 1B In the three-dimensional coordinate system shown, the first direction is the horizontal direction on the ground, pointing from left to right, and can be labeled as the X-axis; the second direction is the direction perpendicular to the ground, pointing from bottom to top, and can be labeled as the Z-axis; the third direction is the horizontal direction on the ground perpendicular to the X-axis, pointing from back to front, and can be labeled as the Y-axis. The first side 101, the second side 102, the third side 103, the fourth side 104, and the front face 105 can be planes, curved surfaces, or other surfaces, and there are no restrictions here.

[0018] The loudspeaker system 100 can emit sound waves to its surroundings via a first side 101, a second side 102, a third side 103, and a fourth side 104. The propagation direction of the sound waves emitted through any one side can include multiple directions. Taking the first side 101 as an example, the propagation directions of the multiple sound waves emitted by the loudspeaker system 100 through the first side 101 can include the -Z direction and directions with an angle between 0° and 90° from the -Z direction. The multiple propagation directions of the sound waves are related to the scattering effect of the diffuser. For an explanation of the diffuser, please refer to [link to relevant documentation]. Figure 2A And its related descriptions.

[0019] like Figure 1A As shown, the loudspeaker system can be placed at the front of the room, facing the listeners. Since the loudspeaker system does not emit sound waves from the front, there is no concentrated sound beam affecting the listening experience of listeners directly in front. Sound waves emitted from the four sides of the loudspeaker system can propagate to the walls, ceiling, floor, tabletops, etc., and are diffusely reflected by these surfaces, forming a diffuse sound field. This diffuse sound field fills the room with sound waves, eliminating blind spots and ensuring that listeners or people located throughout the room can receive the sound waves.

[0020] In some embodiments, the speaker system 100 is positioned in an indoor space, surrounded by walls or other structures that can reflect sound waves, and the side of the speaker system 100 used for sound emission does not directly face the listener. By way of example only, the speaker system can also be placed in other locations within the room, such as the back, side, top, or bottom of the room, without limitation. When the speaker system is placed above or below the room, its front can face upwards or downwards.

[0021] Traditional speakers are typically point sources, emitting a concentrated sound beam from the front. Listeners nearby may find the sound harsh, while those further away may experience sound attenuation and difficulty hearing clearly. The speaker system 100 in this application, however, emits sound from the side, avoiding the harshness caused by the concentrated sound beam from the front for nearby listeners. Simultaneously, the diffuse sound field it generates allows distant listeners to receive sound waves of sufficient intensity, preventing the problem of unclear hearing.

[0022] Figure 2A This is a system schematic diagram of a loudspeaker system according to some embodiments of this specification.

[0023] like Figure 2A As shown, the speaker system 100 includes a mid-high frequency module 1, a low frequency module 2, a near-field microphone module 3, a far-field microphone module 4, a main board module 5, and a diffuser module 6.

[0024] The mid-high frequency module 1 is configured to emit mid-high frequency sound waves laterally outward.

[0025] The mid-high frequency module 1 refers to a speaker assembly used to generate and output mid-to-high frequency sound waves. For example, the mid-high frequency module 1 may include a midrange speaker unit, a tweeter unit, and their driving circuitry in a speaker system. Mid-to-high frequency sound waves refer to sound waves with frequencies in the middle and higher range. For example, mid-to-high frequency sound waves can be the mid-range, high-range, or super-high-range frequencies within the audible range of the human ear, such as sound waves with frequencies above 200Hz. The mid-high frequency module 1 generates mid-to-high frequency sound waves through its midrange speaker unit, tweeter unit, and their driving circuitry.

[0026] The bass module 2 is configured to emit low-frequency sound waves laterally outward.

[0027] In some embodiments, such as Figure 2A As shown, the loudspeaker system may include two mid-high frequency modules and two low frequency modules. A mid-high frequency module or a low frequency module refers to a mid-high frequency module or a low frequency module located on one side of the loudspeaker system.

[0028] In some embodiments, a mid-high frequency module or a bass module may include multiple speaker units stacked along the Y-axis. Two mid-high frequency modules are arranged opposite each other along a first direction and are located on two opposite sides of the speaker system (e.g., a first side and a third side). Two bass modules are arranged opposite each other along a second direction and are located on two opposite sides of the speaker system (e.g., a second side and a fourth side). Each mid-high frequency module is flanked by two bass modules, and each bass module is flanked by two mid-high frequency modules. That is, the bass modules and mid-high frequency modules are located flanking each other. This arrangement of two mid-high frequency modules and two bass modules can help achieve a wider sound field.

[0029] The bass module 2 refers to a speaker assembly used to generate and output low-frequency sound waves. For example, the bass module 2 may include a woofer unit and its driving circuitry within a speaker system. Low-frequency sound waves are sound waves with lower frequencies. For example, low-frequency sound waves can be the deep bass or bass portion within the audible range, such as sound waves with frequencies below 200Hz. The bass module 2 generates low-frequency sound waves through its internal woofer unit and driving circuitry.

[0030] In some embodiments, the acoustic axes of the midrange and tweeter units in the mid-high frequency module 1 and the woofer unit in the woofer module 2 face the side of the speaker system 100, ensuring that sound waves are emitted laterally outward. The woofer unit, midrange speaker unit, and tweeter unit are collectively referred to as speaker units. Each speaker unit has a diaphragm. The acoustic axis is a straight line passing through the geometric center of the diaphragm and perpendicular to the plane of the diaphragm.

[0031] Lateral refers to the direction in which sound waves propagate to the side of the loudspeaker system 100. For example, as Figure 1A The direction of the sides where the first side 101, the second side 102, the third side 103 and the fourth side 104 are shown.

[0032] In some embodiments, the acoustic axes of the midrange speaker unit and the tweeter unit in the midrange-high frequency module 1, and the acoustic axis of the woofer unit in the woofer module 2, are perpendicular to the side of the speaker system 100, for example, perpendicular to an indoor wall.

[0033] In some embodiments, the acoustic axes of the midrange and tweeter units in the midrange-high frequency module 1 and the woofer unit in the woofer module 2 form an angle with the side of the speaker system 100 and are tilted towards the front, for example, with an angle with an indoor wall. This configuration can increase the sound field in the front direction. The angle can be 60-85°, etc.

[0034] The layout of the speaker units described above allows the sound waves to propagate along or substantially along the wall direction (the wall corresponding to the back of the speaker system) when they are first emitted, avoiding the sound waves directly hitting the listener and solving the problem of excessive loudness and harshness at the main radiation angle (i.e., directly in front) of traditional speakers.

[0035] To achieve lateral outward emission of sound waves, the loudspeaker system 100 can also be configured in other ways. In some embodiments, sound waves can be directed to a side opening through an internal acoustic guide structure to achieve lateral outward emission of sound waves. In some embodiments, other acoustic structures can also be used to achieve lateral outward emission of sound waves. For example, sound waves emitted forward or backward by the loudspeaker unit can be diverted to the side by providing specific acoustic ducts or reflectors.

[0036] In some embodiments, the mid-high frequency module 1 and the woofer module 2 are located beside each other. "Beside" means that, with the acoustic axis of the speaker unit of the woofer module 2 or the mid-high frequency module 1 as the center, the woofer module 2 and the mid-high frequency module 1 are located beside the extended line of the acoustic axis of their respective speaker units. In some embodiments, a woofer module 2 is provided on each of the two sides of the mid-high frequency module 1. In some embodiments, a woofer module 2 is provided on only one side of the mid-high frequency module 1. Similarly, a mid-high frequency module 1 is provided on each of the two sides of the woofer module 2, or a mid-high frequency module 1 is provided on only one side of the woofer module 2.

[0037] The diffuser module 6 is configured to scatter the low-frequency and mid-high frequency sound waves emitted by the bass module and the mid-high frequency module outward.

[0038] The loudspeaker system 100 includes multiple diffuser modules 6. Each mid-high frequency module 1 and woofer module 2 corresponds to one diffuser module 6. The diffuser modules 6 are mounted in the sound wave propagation path of the mid-high frequency module 1 and woofer module 2. For example, the diffuser modules 6 are mounted along the sound propagation direction of the loudspeaker units of the mid-high frequency module 1 and woofer module 2, and on a plane perpendicular or substantially perpendicular to the acoustic axis of the loudspeaker units of the mid-high frequency module 1 and woofer module 2. The diffuser modules 6 are physical sound guiding components that can diffuse laterally emitted sound waves at multiple angles through specific structures and materials.

[0039] Because the mid-high frequency module 1 and the low frequency module 2 produce different sound wave wavelengths, their corresponding diffuser modules 6 can also differ in material. The mid-high frequency module 1 produces shorter sound wave wavelengths, such as 0.2m-1.7m, and its corresponding diffuser module 6 can be made of microporous acoustic fiberboard, ultra-thin perforated mesh membrane, flexible microporous silicone foam, etc., with a thickness of 3mm-30mm, etc. The low frequency module 2 produces longer sound wave wavelengths, such as 1.7m-17m, and its corresponding diffuser module 6 can be made of ultra-large pore open-cell foam, lightweight mesh sandwich, gradient porosity composite material, etc., with a thickness of 100mm-300mm, etc.

[0040] The surface of the diffuser module 6 has an uneven shape to diffuse sound waves. The uneven shape can include random bumps, one-dimensional / two-dimensional shallow groove structures, shallow pyramid structures, and a combination of a micro-perforated plate and a shallow cavity at the back. The protrusions can include hemispherical protrusions, conical protrusions, irregular protrusions, etc. The height of the bumps (e.g., protrusion height or recess depth) of the diffuser module 6 corresponding to the mid-high frequency module 1 can be 1mm~20mm, and the spacing between the bumps can be 2mm~60mm, etc. The height of the bumps of the diffuser module 6 corresponding to the low frequency module 2 can be 100mm~290mm, etc., and the spacing between the bumps can be 200~500mm, etc.

[0041] The diffuser module 6 disperses the directional sound waves emitted by the speaker unit, allowing them to radiate outwards at a wider angle and utilizes secondary reflections from walls, ceilings, and floors in the environment to create a more immersive diffuse sound field.

[0042] In some embodiments, the diffuser module 6 includes a reflector cone structure. A reflector cone structure is a structure with a conical geometry used to scatter sound waves. For example, a reflector cone structure can be used to uniformly diffuse sound waves emitted by a loudspeaker system in all directions to achieve a wider sound field.

[0043] In some embodiments, the diffuser module 6 may consist of one or more reflective cone structures. For example, the diffuser module 6 may consist of a single reflective cone structure that forms an integral wave surface. As another example, the diffuser module 6 may consist of an array of multiple independent reflective cone structures integrated on the diffuser module in a specific arrangement (e.g., concentric circles or a matrix arrangement) to collectively form a wave surface.

[0044] In some embodiments, the scattering plate module may also include a reflective cone structure in a variety of other ways. For example, the reflective cone structure may be installed as a pluggable component using a modular design, or the scattering plate module with the reflective cone structure may be directly manufactured using an integral molding process.

[0045] In some embodiments, the reflector cone structure has a cone tip facing at least one of the mid-high frequency module 1 and the low frequency module 2. The cone tip refers to the apex or topmost part of the cone structure. For example, in a loudspeaker system, the cone tip may be directly facing the center of the diaphragm of the loudspeaker unit to guide sound waves to impact and scatter along the cone surface.

[0046] In some embodiments, the reflective cone structure is designed as a standard conical geometry, naturally forming a sharp apex as the cone tip. Alternatively, for ease of manufacturing and optimization of acoustic performance, the cone tip can be a small-radius arc apex. In some embodiments, the cone tip can also be formed in other ways, such as by providing a central protrusion as the cone tip on top of an inverted bowl-shaped structure, or by employing a segmented cone design, where the uppermost small segment forms an approximate cone tip structure.

[0047] In some embodiments, to effectively expand the dispersion angle of the mid-high frequencies, the cone tip can be precisely positioned so that it faces the center of the diaphragm of the speaker unit in the mid-high frequency module. When sound waves are emitted from the mid-high frequency module and strike the cone tip, the sound waves diffuse evenly in all directions along the inclined surface of the reflective cone structure, thereby eliminating the directivity of high-frequency sound waves. Similarly, if specific optimization or guidance of the sound field of the bass module is required, the cone tip can also be oriented towards the center of the bass module's diaphragm to guide low-frequency sound waves to propagate and reflect better in space.

[0048] In some embodiments, the orientation of the cone tip can also be adjusted and optimized in various ways. For example, the relative position between the cone tip and the speaker unit can be changed by a mechanical adjustment mechanism (e.g., a rotatable or translational mounting base), or the optimal orientation and position of the cone tip can be determined by precise calculations using acoustic simulation software during the design phase, or iterative optimization can be achieved by acoustic testing on a physical model.

[0049] In some embodiments of this specification, a reflective cone structure and its cone tip are aligned with the speaker unit. After the sound waves touch the cone, they diffuse outward uniformly in 360 degrees. This breaks the directional constraint of high-frequency sound waves from a physical structure perspective, effectively eliminating listening dead angles. Combined with wall reflection, this further enhances the width of the sound field and the sense of surround sound.

[0050] The near-field microphone module 3 is configured to acquire sound signals in the near-field range.

[0051] The near-field microphone module 3 refers to a microphone assembly used to collect near-field sound signals. For example, the near-field microphone module 3 may include an electret microphone, a micro-electro-mechanical systems (MEMS) microphone array, a piezoelectric microphone, an optical fiber microphone, etc. The near-field range refers to the area close to the sound source where the sound field characteristics are directly and significantly affected by the sound source. For example, the near-field range can refer to the area within 1 meter of a speaker system. The near-field sound signal refers to the signal collected by the near-field microphone module 3, carrying sound information, and capable of processing or transmission. For example, the sound signal can be an electrical signal collected by the microphone, or digitized audio data. In some embodiments, the near-field microphone module 3 converts sound waves within the near-field range into electrical signals through its built-in transducer. For example, when the near-field microphone module 3 is an electret microphone, the sound waves cause the diaphragm to vibrate, thereby changing the capacitance between the electret and the backplate, generating a corresponding electrical signal.

[0052] In some embodiments, the near-field microphone module 3 includes one or more microphone assemblies. The near-field microphone module 3 may be disposed in the area behind the rear of the bass module 2. The rear refers to the area behind the speaker unit of the bass module 2, opposite to the sound-emitting surface of the speaker unit. Figure 2A As shown, the near-field microphone module 3 includes three microphone components, and the three microphone components are located in the area behind the back of the bass module 2.

[0053] The far-field microphone module 4 is configured to acquire sound signals in the far-field range.

[0054] The far-field microphone module 4 refers to a microphone assembly used to collect sound signals in the far-field range. For example, the far-field microphone module 4 may include electret microphones, MEMS microphone arrays, piezoelectric microphones, fiber optic microphones, etc. The far-field range refers to the area far from the sound source, where the sound field characteristics are mainly determined by environmental reflections and diffuse sound fields. For example, the far-field range can refer to an area 3m to 5m or even further away from the speaker system. The far-field sound signal refers to the signal collected by the far-field microphone module 4 that carries sound information and can be processed or transmitted.

[0055] In some embodiments, the far-field microphone module 4 has high sensitivity, enabling it to capture weak sound waves in the far-field range. For example, the far-field microphone module 4 can be a high-sensitivity electret microphone, optimized to detect sound pressure levels and reverberation information at greater distances within a room. Exemplarily, the far-field microphone module can be a MEMS microphone array, incorporating beamforming technology to enhance far-field sound acquisition capabilities. By weighting and phase-shifting the signals from each microphone in the array, a directional beam can be formed, thereby focusing on far-field sound sources and suppressing ambient noise.

[0056] In some embodiments, the far-field microphone module 4 can also acquire sound signals in the far-field range through other means. For example, the far-field microphone module 4 may include a high-gain condenser microphone or a laser microphone, utilizing different technologies to achieve effective pickup of sound from a distance.

[0057] In some embodiments, the far-field microphone module 4 includes one or more microphone assemblies. The far-field microphone module 4 may be disposed in the area behind the rear of the mid-high frequency module 1 and / or the low frequency module 2. Figure 2A As shown, the far-field microphone module 4 includes four microphone assemblies. These four microphone assemblies are located in the area behind the mid-high frequency module 1 and the low frequency module 2, or in other words, they are located at the edge of the area surrounded by the mid-high frequency module 1 and the low frequency module 2.

[0058] Motherboard module 5 is equipped with an audio processing unit. The audio processing unit is configured to optimize the sound effects of the input audio.

[0059] Mainboard module 5 refers to a circuit board assembly that integrates a processor, circuitry, and interfaces for controlling and connecting various functional modules within the speaker system. For example, the mainboard module may integrate a digital signal processor (DSP), a microcontroller unit (MCU), a power amplifier, and interfaces for connecting to each module. For instance, mainboard module 5 is electrically connected to the input terminals (i.e., mid-high frequency module 1 and woofer module 2) and output terminals (i.e., near-field microphone module 3 and far-field microphone module 4) of the speaker system, forming a closed-loop control system. Mainboard module 5 can be located inside the speaker system, for example, in the area surrounding mid-high frequency module 1 and woofer module 2.

[0060] The audio processing unit is one of the core components of the motherboard module. An audio processing unit is an electronic component used to receive, process, and output audio signals to achieve specific audio functions or effects. For example, an audio processing unit can be a DSP (Digital Signal Processor) used to perform functions such as equalization, reverb, or sound field correction. In some embodiments, the audio processing unit can also be an audio processing module integrated into an MCU (Microcontroller Unit), or a separate application-specific integrated circuit (ASIC).

[0061] The audio processing unit receives input audio from external devices or internal storage and uses various algorithms and processing techniques to optimize its sound effects. Input audio refers to the audio data or signal that enters the speaker system for processing or playback. For example, input audio can be from a Bluetooth device, a network streaming media source, or a locally stored music file.

[0062] Sound optimization refers to improving the auditory effect of audio signals through algorithms or other processing methods to achieve better sound quality, sound field performance, or user experience. For example, an audio processing unit can adjust the tone balance by executing a multi-band equalization algorithm. Another example is that an audio processing unit can execute a spatial expansion algorithm, using digital signal processing technology to simulate reverberation and delay, creating a wider and more immersive virtual sound field.

[0063] In some embodiments, sound effect optimization can also be performed in various other ways, including but not limited to pitch compensation, phase correction, and sound field positioning adjustment. For example, multiple preset scene modes (such as music mode, movie mode, and vocal mode) can be provided for users to choose from, or personalized adjustments can be made based on user preferences. In some embodiments, sound effect optimization includes mixing and splitting the left and right channels of the input audio.

[0064] In some embodiments, sound effect optimization includes gaining at least a portion of the input audio. In some embodiments, sound effect optimization includes acquiring the near-field sound loudness of the sound signal in the near-field range collected by the near-field microphone module 3; and controlling the bass module 2 to reduce the output gain of the low-frequency band of the input audio in response to the near-field sound loudness exceeding a preset near-field threshold. In some embodiments, sound effect optimization includes acquiring the far-field sound loudness of the sound signal in the far-field range collected by the far-field microphone module 4; and controlling the mid-high frequency module 1 to increase the output gain of the mid-frequency band of the input audio in response to the far-field sound loudness being lower than a preset far-field threshold.

[0065] In some embodiments, sound effect optimization includes acquiring the near-field sound loudness collected by the near-field microphone module and the far-field sound loudness collected by the far-field microphone module; in response to the near-field sound loudness exceeding a preset near-field threshold and the far-field sound loudness falling below a preset far-field threshold, determining a comprehensive gain parameter based on preset weighting coefficients, wherein the weighting coefficient for near-field sound loudness is higher than that for far-field sound loudness. For more details on sound effect optimization, please refer to [link to documentation]. Figures 3-5 And its related descriptions.

[0066] Figure 2B This is another system schematic diagram of a loudspeaker system 100 shown according to some embodiments of this specification. Figure 2C yes Figure 2B A perspective view of the loudspeaker system 100.

[0067] like Figure 2B and Figure 2C As shown, in some embodiments, the speaker system further includes a power supply module 7 and a housing 8. The housing 8 is configured to provide support for the mid-high frequency module 1, the bass module 2, the near-field microphone module 3, the far-field microphone module 4, the mainboard module 5, the power supply module 7, and the diffuser module 6. The mid-high frequency module 1 and the bass module 2 are disposed on the side of the inner cavity of the housing.

[0068] Power module 7 refers to the module that provides the necessary electrical power to the speaker system. For example, power module 7 includes a battery, a power adapter, or a combination thereof. Power module 7 is electrically connected to mid-high frequency module 1, low frequency module 2, near-field microphone module 3, far-field microphone module 4, and mainboard module 5.

[0069] The housing 8 refers to the structure used to encapsulate and support the various modules inside the speaker system. For example, the housing 8 can be made of plastic, metal, or composite materials and forms the external structure of the speaker system. The shape of the housing 8 can be cubic, approximately cubic, columnar, approximately columnar, spherical, near-spherical, irregular, etc.

[0070] In some embodiments, the housing is connected to the mid-high frequency module, bass module, near-field microphone module, far-field microphone module, motherboard module, power supply module, and diffuser module via internal mounting structures (e.g., mounting holes, screw fixing points) to provide mechanical support and fixation. For example, the housing may be designed with trays or brackets to accommodate specific modules, or may isolate and protect modules by forming independent chambers. In some embodiments, the housing may also provide support for the aforementioned modules in various other ways, including but not limited to integral molding, adhesive fixing, etc.

[0071] In some embodiments, the housing has a sound-passing structure such as a mesh or grille. This sound-passing structure corresponds to the diffuser module and is used to diffuse the sound generated by the speaker system. For example, the sound-passing structure is located on the side of the speaker system (i.e., the front of the non-speaker system) and is located outside the diffuser module. Sound waves emitted by the speaker unit can pass sequentially through the diffuser module and the sound-passing structure before diffusing outwards.

[0072] In some embodiments, the mid-high frequency module 1 and the bass module 2 are mounted on the side of the inner cavity of the housing 8. For example, two mid-high frequency modules 1 and two bass modules 2 are respectively mounted on the four sides of the inner cavity of the housing. A diffuser module 6 is located between the mid-high frequency module 1 or the bass module 2 and the housing. In some embodiments, the diffuser module 6 is mounted on the side wall of the inner cavity of the housing.

[0073] In some embodiments of this specification, the housing 8 provides robust mechanical support and protection for the various functional modules of the speaker system, ensuring stable operation of the speaker system and improving the product's durability and reliability. Simultaneously, the mid-high frequency module 1 and the low frequency module 2 are configured on the sides of the inner cavity of the housing 8, optimizing the acoustic layout and contributing to a more balanced sound field and wider sound diffusion, thus enhancing the user's listening experience.

[0074] In some embodiments, the front of the housing 8 is configured with light-emitting diodes (LEDs) and / or static paintings. The front refers to the surface of an object's housing that primarily faces outwards, is typically the most prominent, or is oriented towards the user. For example, the front of the housing 8 of a speaker system may be the surface primarily facing indoor listeners. An LED is a semiconductor device that converts electrical energy into light energy through the principle of electroluminescence. For example, LEDs can be embedded in the form of dot matrices, light strips, etc., to display spectrum lighting effects, system status information, or ambient lighting. A static painting is an image, pattern, or artwork whose content remains unchanged for aesthetic appreciation. For example, a static painting may be a landscape painting, an abstract art piece printed on the front of the housing 8 of the speaker system, or a picture displayed in a frame. In some embodiments, the front of the housing 8 may simply be the housing itself.

[0075] Since the speaker system 100 adopts a side-emitting design, the front panel of its housing 8 no longer needs to be designed as a mesh or grille for sound transmission, thus forming a complete solid plane or curved surface that can be used to configure LEDs and / or static viewing pictures.

[0076] In some embodiments, the front of the speaker system housing 8 is equipped with light-emitting LEDs. For example, an LED matrix can be embedded inside the front panel, and dynamic spectrum lighting effects can be achieved by controlling the on / off state and color changes of these LEDs, displaying the frequency distribution and intensity of the currently playing audio in real time. Alternatively, LEDs can be configured as light strips along the edges or specific areas of the front panel to display system status information, such as volume level and Bluetooth connection status. LEDs can also be used as ambient breathing lights, emitting soft light according to preset modes or user input to create a specific environmental atmosphere. In some embodiments, LEDs can also be configured on the front in various other ways, including but not limited to using a transparent organic light-emitting diode (OLED) screen to display dynamic images, or using other programmable light-emitting components to achieve customized lighting effects.

[0077] In some embodiments, the front of the speaker system housing 8 is configured with a static image. This allows the speaker system to blend into the home environment when not in use, existing as a decorative painting or artwork. For example, the front panel can be designed in the form of a picture frame, allowing users to change the images or artwork inside to meet their personalized needs. In some embodiments, the static image can also be configured on the front in other ways. For example, the front panel can use a switchable e-ink screen to display static images, or project static images onto the front using projection technology.

[0078] In some embodiments, the front of the speaker system housing 8 can simultaneously house LEDs and a static display. For example, LEDs can be arranged around the static display to provide backlighting or edge lighting effects, thereby enhancing the visual effect of the display. Alternatively, when the static display uses a transparent or translucent material, LEDs can be positioned below the display, emitting light through it at specific times to achieve a richer visual experience. Various combinations of LEDs and static displays are possible, including but not limited to side-by-side, superimposed, or alternating displays, to meet different design and functional requirements.

[0079] Some embodiments in this specification fully utilize the front space of the speaker system freed up by the side-firing design. By configuring LEDs and / or static display panels on this front, the speaker system can not only display dynamic lighting effects and system status, but also integrate into the environment as home décor. This significantly enhances the product's visual appeal and functional versatility, achieving a fusion of home appliances and home art, and providing users with a unique audiovisual and aesthetic experience.

[0080] In some embodiments, the speaker system 100 may also include other modules. For example, the speaker system 100 may include a Bluetooth module for wirelessly communicating with other devices, acquiring input audio, and transmitting the input audio to an audio processing unit. As another example, the speaker system 100 may also include an environmental calibration module. For a description of the environmental calibration module, please refer to... Figure 3 And its related descriptions.

[0081] The speaker system provided in some embodiments of this specification effectively solves the problem of uneven sound field in traditional "point source" systems by combining the lateral sound emission of the bass and mid-high frequency modules with the diffusion effect of the diffuser. This speaker system transforms the concentrated sound beam into a diffuse sound field, significantly expanding the optimal listening area. Simultaneously, by combining near-field / far-field microphones to collect ambient acoustic information and optimizing sound effects through an audio processing unit, it improves sound quality and sound field performance, achieving uniform coverage and a sense of immersion in the indoor sound field, thus providing a more comfortable listening experience.

[0082] In some embodiments, to avoid the defects of the speaker system's sound performance being affected by the materials of the installation environment (such as glass, curtains, and wood panels) when using wall-mounted or other wall-mounted installation methods, the speaker system can actively emit test waves and collect echoes to perceive the acoustic characteristics of the installation wall and automatically generate compensation parameters to process the input audio, ensuring that the standard frequency response curve and sound field effect expected by the design can be presented whether it is installed in a soft-pack listening room or a hard-reflective living room.

[0083] Figure 3 This is an exemplary schematic diagram illustrating the processing of input audio based on environmental compensation parameters according to some embodiments of this specification.

[0084] In some embodiments, the speaker system further includes: an environmental calibration module configured to drive at least one of the bass module and the mid-high frequency module to emit test sound waves 310, and to acquire reflected echoes 320 by at least one of the near-field microphone module and the far-field microphone module; and an audio processing unit further configured to generate environmental compensation parameters 330 based on the reflected echoes, and to process the input audio based on the environmental compensation parameters.

[0085] In some embodiments, the audio processing unit may process the input audio by optimizing the sound effects of the input audio 340.

[0086] For more information on the bass module, mid-high frequency module, near-field microphone module, far-field microphone module, input audio, and audio processing unit, please refer to [link to relevant documentation]. Figure 2A And its related descriptions.

[0087] An environmental calibration module refers to a module that performs environmental acoustic characteristic calibration. For example, an environmental calibration module can drive the bass module and / or mid-high frequency module to emit test sound waves, and acquire reflected echoes collected by the near-field microphone module and / or far-field microphone module, so that the audio processing unit can determine environmental compensation parameters. Furthermore, the process of determining these environmental compensation parameters can also be referred to as the environmental acoustic characteristic calibration process.

[0088] In some embodiments, the environmental calibration module may be a circuit module of a DSP, a field-programmable gate array, or a dedicated acoustic calibration chip.

[0089] In some embodiments, the environmental calibration module can perform triggered or periodic environmental acoustic characteristic calibration of the speaker system. For example, the environmental calibration module can automatically perform calibration when the speaker system is first powered on, after the speaker system's location has been moved, or at a preset cycle to ensure that the sound output always adapts to the actual listening environment.

[0090] Test sound waves are sound waves emitted by a loudspeaker system used to detect and analyze its acoustic environment. For example, test sound waves can be preset sound waves such as full-band sweep signals, pink noise, pulse signals, white noise, or sine waves emitted at specific frequencies.

[0091] In some embodiments, when environmental calibration module is required to perform environmental acoustic characteristic calibration, it drives at least one of the bass module and mid-high frequency module to emit test sound waves.

[0092] A reflected echo refers to the sound wave signal that returns to the location of the speaker system after being reflected from environmental interfaces such as walls, floors, and ceilings or other object surfaces during its propagation. In some embodiments, the reflected echo can be collected by at least one of a near-field microphone module and a far-field microphone module. For example, the sound wave collected by the near-field microphone module and / or the far-field microphone module after the test sound wave is emitted.

[0093] Environmental compensation parameters are audio processing parameters used to compensate for the impact of the acoustic characteristics of the listening space on audio playback. The listening space refers to the space where the speaker system is located, such as a room or home theater. The acoustic characteristics of the listening space are acoustic properties related to sound propagation, reflection, reverberation, and noise, determined by the spatial structure, material properties, and environmental conditions of the listening space.

[0094] In some embodiments, environmental compensation parameters may include filter parameters, band gain values, phase compensation parameters, or combinations thereof.

[0095] In some embodiments, the audio processing unit performs time-domain and / or frequency-domain analysis on the reflected echoes and corresponding test sound waves collected by the near-field microphone module or the far-field microphone module to determine the degree of attenuation, resonance peak or reverberation characteristics of the environment at different frequency bands, and calculates the corresponding environmental compensation parameters based on the analysis results.

[0096] For example, when the attenuation rate of the reflected echo relative to the test sound wave in the high-frequency band is higher than a preset threshold, the audio processing unit determines that there are strong sound absorption characteristics in the listening space, and increases the frequency band gain value corresponding to the high-frequency band in the environmental compensation parameters based on these sound absorption characteristics. The preset threshold is determined by those skilled in the art based on experience. Sound absorption characteristics refer to the acoustic properties of materials (such as walls, curtains, etc.) or structures in the listening space that absorb sound wave energy, resulting in a reduction in reflected sound energy.

[0097] For example, when the reflected echo has a standing wave peak in the low-frequency band that is significantly higher than that of the adjacent frequency band (e.g., higher than the amplitude of the adjacent frequency band and the difference between the amplitude of the two adjacent frequency bands is greater than the preset amplitude threshold), the audio processing unit determines that there is a resonance phenomenon in the listening space, and adjusts the corresponding low-frequency filter parameters in the environmental compensation parameters based on the resonance characteristics to "flatten" the frequency response curve of the room.

[0098] In some embodiments, when the audio processing unit performs playback processing on the input audio, it includes adjusting the audio signal of the input audio in real time or non-real time based on environmental compensation parameters. For example, the audio processing unit can superimpose the filter parameters, frequency band gain values, and phase compensation parameters from the environmental compensation parameters into the audio processing link to adjust the gain, suppress the frequency, or correct the phase of the corresponding frequency band of the input audio, thereby reducing the adverse effects of environmental factors on the audio playback effect.

[0099] In some embodiments of this specification, at least one of the bass module and mid-high frequency module is driven by an environmental calibration module to emit test sound waves. Based on the reflected echoes collected by one of the near-field microphone module and far-field microphone module, the audio processing unit generates environmental compensation parameters, enabling the audio processing unit to adaptively process the input audio according to the acoustic characteristics of different installation environments. Therefore, the speaker system can dynamically adjust the environmental compensation parameters under different wall materials and spatial acoustic conditions, reducing the impact of environmental changes on frequency response and sound field consistency, and improving adaptability and audio output stability in various installation scenarios.

[0100] In some embodiments, in order to ensure that a single device (such as a single speaker system) can fully reproduce all the information of the stereo source and avoid the loss of details in one channel due to the placement of the single device, the audio processing unit is further configured to perform left and right channel mixing and splitting processing on the input audio.

[0101] Left and right channels refer to the two audio signal channels in stereo audio used to represent the left and right sound field information, respectively.

[0102] Mixing refers to superimposing or weighting the audio signals of the left and right channels of the input audio.

[0103] In some embodiments, the audio processing unit performs left and right channel mixing on the input audio based on a DSP.

[0104] Segmentation refers to the process by which the audio processing unit re-selects and distributes the mixed audio signal to different physical output channels. Preset rules are processing rules that are pre-defined based on the speaker system's structure and the characteristics of its drivers, used to segment the audio signal. For example, preset rules could segment the audio signal based on frequency range.

[0105] In some embodiments, the audio processing unit segments the mixed audio signal based on preset rules and sends it to the corresponding module. For example, the audio processing unit separates the low-frequency signal from the mixed audio signal and sends it to the bass module, and separates the mid-high frequency signal from the mixed audio signal and sends it to the mid-high frequency module.

[0106] Low frequency refers to the portion of an audio signal with frequencies below 200Hz. Mid-high frequency refers to the portion of an audio signal with frequencies above 200Hz.

[0107] In some embodiments, the mid-to-high frequency band can be further divided into the mid-frequency band and the high-frequency band. The mid-frequency band refers to the portion of the audio signal with frequencies between 200Hz and 2000Hz. The high-frequency band refers to the portion of the audio signal with frequencies between 2kHz and 20kHz.

[0108] In some embodiments of this specification, by mixing and splitting the input audio into left and right channels, the speaker system, when used as a standalone device, can fully acquire and retain the acoustic information in the stereo source, reducing the problem of missing information in one channel due to the limited placement of a single speaker. At the same time, based on the mixing and splitting process, the processed audio signal is distributed to the bass module and mid-high frequency module for playback according to preset rules, so that different sound units process their corresponding frequency bands, thereby improving the frequency band matching rationality of the speaker system and improving the overall sound quality and stability of audio playback.

[0109] In some embodiments, in order to enable the speaker system to finely modify and compensate the sound curve according to different acoustic environments or physical locations, the audio processing unit is further configured to: gain at least a portion of the input audio.

[0110] At least a portion of the input audio refers to a frequency band of the input audio. For example, at least one of low-frequency band, mid-frequency band, and high-frequency band. In some embodiments, the numerical equalizer can divide the input audio into low-frequency band, mid-frequency band, and high-frequency band, and perform independent gain processing on the low-frequency band, mid-frequency band, and high-frequency band respectively.

[0111] Gain refers to the amplification or attenuation of signal amplitude.

[0112] In some embodiments, the audio processing unit uses the user's historical adjustment records as a reference standard to apply gain to at least a portion of the input audio. For example, the gain parameter with the most playback times in the historical playback records of the current input audio is selected as the gain parameter for this operation, and the corresponding frequency band is given the corresponding gain.

[0113] As an example only, the audio processing unit includes a parametric equalizer module. This module is configured to independently adjust the gain of different frequency ranges in the input audio signal. For example, to accommodate differences in sound pressure levels detected by the near-field and far-field microphone modules, the parametric equalizer module may include: a channel for controlling the low-frequency band, whose gain dynamically attenuates in response to the near-field sound pressure level signal; and a channel for controlling the mid-frequency band, whose gain dynamically increases in response to the far-field sound pressure level signal.

[0114] For more information on how to gain at least a portion of the input audio, see [link to relevant documentation]. Figure 4 And its related descriptions.

[0115] In some embodiments of this specification, by performing gain processing on at least a portion of the input audio, the audio processing unit can controllably adjust the amplitude of the audio signal, thereby improving the speaker system's adaptability to different audio content and playback requirements. Simultaneously, this gain processing provides a basic adjustment mechanism for subsequent, more refined processing of the audio signal, enabling the speaker system to appropriately adjust the audio signal under different usage scenarios, thus improving the overall audio playback effect and stability.

[0116] Figure 4 This is an exemplary schematic diagram illustrating the adjustment of output gain according to some embodiments of this specification.

[0117] In some embodiments, the audio processing unit is further configured to: acquire the near-field sound loudness 410 of the near-field range sound signal collected by the near-field microphone module; and control the bass module to reduce the output gain 430 of the low-frequency band of the input audio in response to the near-field sound loudness exceeding a preset near-field threshold 420.

[0118] For more information on the audio processing unit, bass module, near-field microphone module, near-field range, and near-field sound signals and input audio, please refer to [link to relevant documentation]. Figure 2A And its related descriptions.

[0119] Near-field sound loudness refers to the sound pressure level corresponding to a sound signal in the near-field range. In some embodiments, the near-field sound loudness can be calculated by a DSP (such as an audio processing unit) on the motherboard module based on the near-field sound signal acquired by the near-field microphone module. For more information about the motherboard module, see [link to relevant documentation]. Figure 2A And its related descriptions.

[0120] In some embodiments, near-field sound loudness is used to reflect the actual acoustic energy level produced by the loudspeaker in the near-field range. In some embodiments, near-field sound loudness may be expressed as equivalent continuous sound pressure level or instantaneous sound pressure level, in decibels (dB).

[0121] A preset near-field threshold is a reference loudness threshold used to determine whether near-field loudness exceeds a comfortable or safe range. In some embodiments, when the near-field sound loudness exceeds the preset near-field threshold, the human ear may feel discomfort or pressure in the near-field range.

[0122] In some embodiments, the preset near-field threshold can be set according to human auditory comfort or hearing protection standards. For example, the preset near-field threshold can be 85dB, 88dB, or 90dB.

[0123] In some embodiments, the preset near-field threshold is determined based on the far-field sound loudness acquired by the far-field microphone module. For more information on the far-field microphone module, see [link to relevant documentation]. Figure 2A And its related descriptions.

[0124] Far-field loudness refers to the sound pressure level corresponding to a sound signal in the far-field range. For more information on far-field range and far-field sound signals, please refer to [link to relevant documentation]. Figure 2A And related descriptions. In some embodiments, the far-field sound loudness can be calculated by a DSP (such as an audio processing unit) on the motherboard module based on the far-field sound signal collected by the far-field microphone module.

[0125] In some embodiments, the preset near-field threshold is positively correlated with the far-field sound loudness. For example, the audio processing unit can calculate the preset near-field threshold using formula (1). Formula (1) is: (1), In formula (1), Indicates the preset near-field threshold; Indicates the basic threshold; Indicates the adjustment coefficient; Indicates the loudness of far-field sounds.

[0126] The baseline threshold refers to the reference loudness threshold used for near-field hearing protection in a relatively quiet environment. In some embodiments, the baseline threshold may be preset manually, for example, 85 dB, to correspond to the comfortable or safe sound pressure level range of the human ear in the near field.

[0127] The adjustment coefficient is a weighted parameter that characterizes the degree to which far-field sound loudness affects the near-field threshold. In some embodiments, the adjustment coefficient is a positive value. In some embodiments, the adjustment coefficient may be preset by those skilled in the art based on experience.

[0128] In some embodiments of this specification, by dynamically determining the preset near-field threshold based on the far-field sound loudness, the problem of excessive limiting caused by a fixed threshold in a noisy environment can be effectively avoided. This allows the loudspeaker system to effectively suppress near-field over-loudness in a quiet environment and maintain sufficient output capability under high ambient noise conditions, achieving an intelligent balance between hearing protection and sound reinforcement performance.

[0129] Output gain refers to the linear amplification factor applied to a signal path (or frequency band) to control its final output power. In some embodiments, in response to a near-field sound loudness exceeding a preset near-field threshold, the audio processing unit calculates the gain value that needs to be reduced in the low-frequency band based on the near-field sound loudness collected by the near-field microphone module using a DSP algorithm, and then sends the gain value to the bass module. The bass module performs real-time gain reduction processing on the low-frequency band of the input audio signal based on the received gain value.

[0130] In some embodiments, the actual gain value of the low-frequency band after gain reduction processing can also be referred to as the first gain value.

[0131] The first gain value refers to the actual gain value after real-time gain reduction processing of the low-frequency band of the input audio signal based on the bass module when the near-field sound loudness exceeds the preset near-field threshold.

[0132] Reducing the output gain of the low-frequency band of the input audio means reducing the linear amplification factor of the low-frequency band without changing the mid-frequency and high-frequency bands of the input audio.

[0133] In some embodiments of this specification, the near-field sound loudness collected by the near-field microphone module is acquired, and when the near-field sound loudness exceeds a preset near-field threshold, the bass module is automatically controlled to reduce the low-frequency output gain of the input audio. This design can actively adjust to address the problem of low-frequency energy accumulation in near-field listening scenarios, thereby effectively suppressing the abruptness and discomfort caused by excessive near-field low-frequency noise in relatively quiet environments, and avoiding weakening the overall sound reinforcement capability due to excessive restriction in noisy environments. This allows the speaker system to achieve an adaptive balance between hearing protection and low-frequency performance, improving near-field listening comfort and system applicability in different usage scenarios.

[0134] In some embodiments, the audio processing unit is further configured to: acquire the far-field sound loudness 440 of the far-field range sound signal collected by the far-field microphone module; and control the mid-high frequency module to increase the output gain 460 of the mid-frequency band of the input audio in response to the far-field sound loudness being lower than a preset far-field threshold 450.

[0135] For more information on the mid-high frequency module and far-field range audio signals, please refer to [link / reference]. Figure 2A And its related descriptions.

[0136] The preset far-field threshold is a reference loudness threshold that characterizes the lower limit of sound that the human ear can perceive within the far-field range.

[0137] In some embodiments, when the far-field sound loudness is less than a preset far-field threshold, the human ear may not be able to hear or clearly hear the sound of the speaker system in the far-field range.

[0138] In some embodiments, the preset far-field threshold is preset by those skilled in the art based on experience.

[0139] Increasing the output gain of the mid-frequency band of the input audio refers to increasing the linear amplification factor of the mid-frequency band without changing the low-frequency and high-frequency bands of the input audio.

[0140] In some embodiments, in response to a far-field sound loudness lower than a preset far-field threshold, the audio processing unit calculates the gain value to be added in the mid-frequency band based on the far-field sound loudness collected by the far-field microphone module using a DSP algorithm, and then sends the gain value to the mid-high frequency module. The mid-high frequency module performs real-time gain amplification processing on the mid-frequency band of the input audio signal based on the received gain value.

[0141] In some embodiments, the actual gain value of the mid-frequency band after gain amplification can also be referred to as the second gain value.

[0142] The second gain value refers to the actual gain value after the mid-frequency band of the input audio signal is amplified based on the mid-high frequency module when the far-field sound loudness is lower than the preset far-field threshold.

[0143] In some embodiments of this specification, by performing gain compensation only on the mid-frequency band when the far-field sound loudness is lower than a preset far-field threshold, it is possible to precisely enhance the human voice frequency band, which is prone to attenuation during the long-distance propagation of sound waves, without having to increase the overall output volume. This effectively improves the clarity of human voice and listening comfort when listening in the far field without amplifying environmental noise.

[0144] In some embodiments, the audio processing unit is further configured to: acquire the near-field sound loudness acquired by the near-field microphone module and the far-field sound loudness acquired by the far-field microphone module; and determine a comprehensive gain parameter based on a preset weighting coefficient in response to the near-field sound loudness exceeding a preset near-field threshold and the far-field sound loudness being lower than a preset far-field threshold.

[0145] The preset weighting coefficients are the weighting coefficients that characterize the near-field sound loudness and far-field sound loudness in the calculation of the overall gain parameter. The preset weighting coefficients include weighting coefficients for near-field sound loudness and far-field sound loudness. The weighting coefficient for near-field sound loudness is higher than that for far-field sound loudness.

[0146] The comprehensive gain parameter refers to the gain value obtained by fusing different gain adjustment results according to a preset weighting coefficient when the near-field sound loudness exceeds the preset near-field threshold and the far-field sound loudness is lower than the preset far-field threshold.

[0147] In some embodiments, the composite gain parameter is positively correlated with the first gain value and the second gain value. For example, the audio processing unit can determine the composite gain parameter using formula (2). Formula (2) is: (2), In formula (2), Indicates the overall gain parameter; Indicates the first gain value; α represents the second gain value; β represents the weighting coefficient of near-field sound loudness; and β represents the weighting coefficient of far-field sound loudness.

[0148] In some embodiments, α=0.8, β=0.2.

[0149] In some embodiments of this specification, when near-field hearing protection and far-field hearing enhancement requirements occur simultaneously, a preset weighting coefficient algorithm is used to give near-field sound loudness a higher weight in the comprehensive gain calculation, thereby systematically prioritizing the hearing safety of near-field listeners and avoiding the risk of sound pressure overload in the near field that may be caused by improving far-field clarity, thus realizing intelligent audio control with safety as the priority.

[0150] Figure 5 This is an exemplary flowchart of a control method for a loudspeaker system according to some embodiments of this specification. In some embodiments, process 500 includes steps 510-520 and / or steps 530-540. Process 500 may be executed based on the audio processing unit of the loudspeaker system.

[0151] Step 510: Obtain the near-field sound loudness of the near-field sound signal collected by the near-field microphone module.

[0152] For more information on near-field microphone modules, near-field range, and the audio signal within the near-field range, please see [link to relevant documentation]. Figure 2A And its related descriptions.

[0153] For more information on near-field sound loudness and how to obtain near-field sound loudness, please see [link to relevant documentation]. Figure 4 And its related descriptions.

[0154] Step 520: In response to the near-field sound loudness exceeding a preset near-field threshold, control the bass module to reduce the output gain of the low-frequency band of the input audio.

[0155] For more information on the bass module and input audio, see 2A and its related descriptions.

[0156] For more information on preset near-field thresholds and how to control output gain in the low-frequency range, please refer to [link to relevant documentation]. Figure 4 And its related descriptions.

[0157] Step 530: Obtain the far-field sound loudness of the far-field sound signal collected by the far-field microphone module.

[0158] For more information on far-field microphone modules, far-field range, and far-field sound signals, please see [link to relevant documentation]. Figure 2A And its related descriptions.

[0159] For more information on far-field sound loudness and how to obtain it, please refer to [link / reference]. Figure 4 And its related descriptions.

[0160] Step 540: In response to the far-field sound loudness being lower than the preset far-field threshold, the mid-high frequency module is controlled to increase the output gain of the mid-frequency band of the input audio.

[0161] For more information on the mid-high frequency module and input audio, please see [link / reference]. Figure 2A And its related descriptions.

[0162] For more information on preset far-field thresholds and how to control output gain in the mid-frequency band, please refer to [link to relevant documentation]. Figure 4 And its related descriptions.

[0163] In some embodiments of this specification, by introducing dual-channel sound signal acquisition in the near field and far field ranges and independent loudness judgment logic, accurate identification and differentiation of two typical scenarios, "near field hearing protection" and "far field hearing enhancement," are achieved. Different targeted audio adjustment strategies can be executed for the hearing safety needs of near-field listeners and the sound clarity needs of far-field listeners, thereby improving the effectiveness and scenario applicability of audio adjustment.

[0164] It should be noted that the above description of process 500 is for illustrative purposes only and does not limit the scope of this specification. Those skilled in the art can make various modifications and changes to process 500 under the guidance of this specification. However, these modifications and changes remain within the scope of this specification.

[0165] This specification also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the methods described in the above embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0166] In some embodiments, a readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0167] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0168] Furthermore, this specification uses specific terms to describe embodiments thereof. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Moreover, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.

[0169] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods described herein. Although various examples have been discussed in the foregoing disclosure of some embodiments of the invention that are currently considered useful, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments; rather, the claims are intended to cover all modifications and equivalent combinations that conform to the spirit and scope of the embodiments described herein. For example, while the system components described above can be implemented using hardware devices, they can also be implemented solely using software solutions, such as installing the described system on existing servers or mobile devices.

[0170] Similarly, it should be noted that, in order to simplify the description disclosed herein and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of embodiments in this specification may sometimes combine multiple features into a single embodiment, drawing, or description thereof. However, this method of disclosure does not imply that the subject matter of this specification requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of a single embodiment disclosed above.

[0171] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this specification are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0172] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this specification, the entire contents of which are incorporated herein by reference. This excludes historical application documents that are inconsistent with or conflict with the content of this specification, as well as documents that limit the broadest scope of the claims in this specification (currently or subsequently appended to this specification). It should be noted that in the event of any inconsistency or conflict between the descriptions, definitions, and / or terminology used in the supplementary materials to this specification and the content of this specification, the descriptions, definitions, and / or terminology used in this specification shall prevail.

[0173] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A loudspeaker system, characterized in that, The system includes a bass module, a mid-high frequency module, a near-field microphone module, a far-field microphone module, a mainboard module, and a diffuser module. The bass module and the mid-high frequency module are located beside each other. The bass module is configured to emit low-frequency sound waves laterally outward, and the mid-high frequency module is configured to emit mid-high frequency sound waves laterally outward. The near-field microphone module is configured to collect sound signals in the near-field range, and the far-field microphone module is configured to collect sound signals in the far-field range. The mainboard module is equipped with an audio processing unit, which is configured to optimize the sound effects of the input audio. The diffuser module is configured to scatter the low-frequency sound waves and the mid-high frequency sound waves emitted by the bass module and the mid-high frequency module outward.

2. The loudspeaker system according to claim 1, characterized in that, It also includes a power module and a housing, the housing being configured to provide support for the bass module, the mid-high frequency module, the near-field microphone module, the far-field microphone module, the power module, the motherboard module, and the diffuser module; the bass module and the mid-high frequency module are disposed on the side of the inner cavity of the housing.

3. The speaker system according to claim 2, wherein the front of the housing is provided with a light-emitting diode (LED) and / or a static display.

4. The loudspeaker system of claim 1, wherein the diffuser module includes a reflector cone structure having a cone tip facing at least one of the bass module and the mid-high frequency module.

5. The speaker system according to claim 1, wherein the audio processing unit is further configured to: perform left and right channel mixing and splitting processing on the input audio.

6. The speaker system of claim 1, wherein the audio processing unit is further configured to: gain at least a portion of the input audio.

7. The loudspeaker system according to claim 6, wherein the audio processing unit is further configured to: Acquire the near-field sound loudness of the sound signal in the near-field range collected by the near-field microphone module; In response to the near-field sound loudness exceeding a preset near-field threshold, the bass module is controlled to reduce the output gain of the low-frequency band of the input audio.

8. The speaker system according to claim 6, wherein the audio processing unit is further configured to: Acquire the far-field sound loudness of the sound signal in the far-field range collected by the far-field microphone module; In response to the far-field sound loudness being lower than a preset far-field threshold, the mid-high frequency module is controlled to increase the output gain of the mid-frequency band of the input audio.

9. The control method for the loudspeaker system as described in claim 1, characterized in that, include: Acquire the near-field sound loudness of the sound signal in the near-field range collected by the near-field microphone module; In response to the near-field sound loudness exceeding a preset near-field threshold, the bass module is controlled to reduce the output gain of the low-frequency band of the input audio. Alternatively, acquire the far-field sound loudness of the sound signal in the far-field range collected by the far-field microphone module; In response to the far-field sound loudness being lower than a preset far-field threshold, the mid-high frequency module is controlled to increase the output gain of the mid-frequency band of the input audio.

10. A computer-readable storage medium storing computer instructions that, when executed by a processor, implement the control method for a loudspeaker system as described in claim 9.

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