Electromagnetic shielding method for high-density integrated wireless audio module

Abstract

The invention discloses an electromagnetic shielding method for a high-density integrated wireless audio module, and the method comprises the steps: employing a metal material with good conductivity and corrosion resistance, such as aluminum alloy and copper alloy, to cover the outer surface of the module, and enabling the outer metal shielding layer to be used for isolating external electromagnetic interference; the thickness of the outer metal shielding layer is generally 0.3 mm to 1 mm, it is ensured that external electromagnetic radiation can be effectively reflected or absorbed, and the outer metal shielding layer is located between the outer metal shielding layer and the inner conductive coating and is made of a material with high-frequency absorption performance, such as a ferrite material, a conductive polymer or a carbon-based material. The thickness of the wave-absorbing layer can be designed according to the electromagnetic characteristics of a working frequency band and is generally 0.5 mm to 2 mm, so that high-frequency noise can be effectively attenuated. By adopting a multi-layer shielding structure and an intelligent heat dissipation design, electromagnetic interference is effectively reduced, miniaturization and light weight of the wireless audio module are maintained, and compared with the prior art in which a large number of expensive shielding materials are needed, the wireless audio module has the advantages that the selection of the shielding materials and the intelligent heat dissipation design are optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic shielding, and particularly to an electromagnetic shielding method for a high-density integrated wireless audio module. Background Art

[0002] The electromagnetic shielding method for a high-density integrated wireless audio module mainly adopts advanced electromagnetic compatibility (EMC) technologies to reduce electromagnetic interference (EMI) of the module in a high-density integrated environment. This method generally includes the following strategies: First, a wireless module is physically coated with an efficient metal shielding case (such as aluminum alloy, copper or nickel-copper alloy) to isolate external electromagnetic wave interference; Second, through a precisely designed PCB layout and ground plan, the coupling between power lines and signal lines is reduced to suppress high-frequency noise; In addition, wave-absorbing materials or electromagnetic shielding films (such as conductive coatings) are combined to cover key signal paths to effectively absorb and reflect electromagnetic waves; Finally, the signal transmission is further optimized by using components such as filters, varistors, and absorption rings to prevent electromagnetic interference from affecting the quality of audio signals. Through these comprehensive measures, the electromagnetic immunity and signal stability of the high-density integrated wireless audio module can be significantly improved, ensuring its normal operation in a complex electromagnetic environment.

[0003] In the prior art, although the electromagnetic shielding method of high-density integrated wireless audio modules effectively reduces electromagnetic interference (EMI) and improves the electromagnetic compatibility of the modules, there are also some disadvantages, mainly including the following aspects: Increase in volume and weight: To effectively shield electromagnetic interference, a metal enclosure or thick shielding material is usually required, which will lead to an increase in the volume and weight of the module. Especially in a high-density integrated environment, this problem is more obvious. For devices with limited volume or requirements for portability (such as portable audio devices), this increased volume and weight may not be suitable; Increase in cost: High-efficiency electromagnetic shielding materials (such as high-performance metal alloys, conductive coatings, wave-absorbing materials, etc.) are usually expensive, especially when mass production is required, the cost will increase significantly. In addition, precise PCB layout and design also require higher manufacturing precision, further driving up the production cost; Thermal management problem: The metal enclosure and other electromagnetic shielding materials may affect the heat dissipation performance of the module, resulting in heat accumulation. In high-density integrated modules, especially in the case of high-power operation, the heat dissipation problem may become particularly prominent, thus affecting the stability and service life of the system; Signal attenuation and noise problems: Although electromagnetic shielding can reduce external interference, it may sometimes also affect the transmission of internal signals, resulting in signal attenuation or noise problems. Especially in a complex wireless audio system, if the shielding material is not reasonably designed, it may instead affect the quality of the wireless signal, resulting in audio signal distortion or packet loss; Inconsistent shielding effect: Different types of electromagnetic interference (such as radiation interference and conduction interference) may require different shielding schemes, and the existing shielding methods usually have a better effect on a certain type of interference, but have limited effects on other types of interference. In addition, the shielding effect may be affected by factors such as the quality of the shielding material, grounding design, and module layout, resulting in inconsistency in the shielding effect between different modules; Complex design and manufacturing process: The shielding design of high-density integrated wireless audio modules requires fine layout and strict manufacturing processes. Designers need to balance multiple factors such as electromagnetic shielding, heat dissipation, signal transmission, and cost. The entire design and manufacturing process is relatively complex, increasing the difficulty of development and production.

[0004] Therefore, we propose an electromagnetic shielding method for high-density integrated wireless audio modules. Summary of the Invention

[0005] To achieve the above object, the present invention provides the following technical solution: An electromagnetic shielding method for a high-density integrated wireless audio module, comprising the following steps:

[0006] S1: Adopt a multi-layer shielding structure, and this multi-layer shielding structure includes the following three levels:

[0007] Outer metal shielding layer: Made of metal materials with good electrical conductivity and corrosion resistance, such as aluminum alloy, copper alloy, etc., covering the outer surface of the module to isolate external electromagnetic interference. The thickness of the outer metal shielding layer is generally 0.3mm to 1mm to ensure effective reflection or absorption of external electromagnetic radiation.

[0008] Middle wave-absorbing layer: Located between the outer metal shielding layer and the inner conductive coating, made of materials with high-frequency absorption performance, such as ferrite materials, conductive polymers or carbon-based materials. The thickness of the wave-absorbing layer can be designed according to the electromagnetic characteristics of the working frequency band, generally 0.5mm to 2mm, which can effectively attenuate high-frequency noise.

[0009] Inner conductive coating: In the circuit area inside the module, a thin-film conductive coating is used, such as silver-based coating, copper-based coating, etc. The thickness of the conductive coating is generally 5μm to 30μm, which can further improve the electromagnetic shielding effect of the internal discrete circuit and reduce the interference of internal noise.

[0010] S2: Intelligent heat dissipation design: Design a heat conduction path inside the wireless audio module, and use high thermal conductivity materials (such as thermal conductive silicone, graphene heat dissipation film, etc.) to guide and conduct the heat generated inside the module, avoiding performance degradation caused by the increased heat load due to electromagnetic shielding. The thermal conductivity of the thermal conductive material is generally greater than 150W / m·K, which can ensure that the module still maintains an appropriate temperature during high-power operation.

[0011] S3: Signal isolation technology: In the PCB design of the wireless audio module, optimize the signal path layout, specifically including:

[0012] Physically isolate the high-frequency signal path from the low-frequency signal path to avoid electromagnetic interference between different signals.

[0013] Use an independent ground network (for example, split ground plane design) to provide independent electrical grounding for each signal channel and reduce cross-interference.

[0014] In the PCB layout, reasonably configure the distance between the signal and power lines, and minimize the mutual coupling between the signal lines and noise sources.

[0015] S4: Application of adaptive electromagnetic shielding materials: Use materials with adjustable electromagnetic shielding performance in the external shielding layer, for example:

[0016] Adjustable frequency conductive coating: Adopt a conductive coating material that can adaptively adjust the electromagnetic shielding efficiency according to the working frequency. For example, use carbon nanotubes or metal-oxide composite coatings, which can dynamically adjust their shielding effect according to frequency changes.

[0017] Electromagnetic Tuning Coating: The use of an electromagnetic tuning coating with frequency response characteristics to adapt to changes in different electromagnetic environments, thereby improving the adaptability and anti-interference ability of the module.

[0018] Preferably, among them:

[0019] The material of the outer metal shielding layer is selected as aluminum alloy or copper alloy, with a thickness of 0.5 mm to 1 mm, and the surface treatment adopts anodic oxidation or nickel plating process to improve corrosion resistance and durability.

[0020] The middle wave-absorbing layer uses ferrite material or conductive polymer, with a thickness of 0.5 mm to 1.5 mm, and has good high-frequency noise absorption performance. This wave-absorbing layer can effectively attenuate high-frequency electromagnetic waves above 1 GHz.

[0021] The inner conductive coating uses a copper-based conductive coating, with a coating thickness of 10 μm to 20 μm, and the resistivity of the coating is controlled within the range of 10^-5 Ω·cm to ensure good electromagnetic shielding effect.

[0022] The heat-conducting material is heat-conducting silica gel or graphene heat-dissipating film, with a thermal conductivity greater than 200 W / m·K, to ensure that the module can effectively dissipate heat during long-term operation and avoid performance degradation caused by overheating.

[0023] Preferably, among them:

[0024] The specific implementation methods of signal isolation technology include:

[0025] Physical isolation of signal paths: In PCB design, a multi-layer PCB structure is used to arrange high-frequency and low-frequency signals on different circuit layers respectively to reduce signal coupling.

[0026] Independent ground wire network design: Set up independent ground wires for each signal channel and arrange the ground wires as far apart as possible to avoid ground loop interference between different signal channels.

[0027] Use of filters: Install radio frequency filters or low-pass filters at the signal input and output ports to reduce unnecessary high-frequency noise transmission and improve signal quality.

[0028] Optimization of signal path layout: Optimize the distance between the signal path and the power path, separate high-frequency signals from noise sources (such as power supplies, digital circuits, etc.) as much as possible, and take appropriate shielding measures to protect the high-frequency signal path.

[0029] Preferably, among them:

[0030] The applications of adaptive electromagnetic shielding materials include:

[0031] Adjustable electromagnetic shielding coating: A conductive coating with adjustable frequency is applied on the external metal shielding layer, and the electromagnetic shielding performance of the coating can be dynamically adjusted according to the electromagnetic frequency characteristics in the module's usage environment. This coating material can adapt to the changes in different electromagnetic environments according to actual needs, enhancing the shielding effect.

[0032] Electromagnetic tuning coating: An electromagnetic tuning coating, such as a coating based on composite materials, is used to effectively shield electromagnetic waves in specific frequency bands and optimize the transmission quality of wireless signals.

[0033] Dynamic adjustment of electromagnetic shielding effect: During the operation of the module, taking advantage of the changes in the external electromagnetic environment, through embedded sensors and intelligent control systems, the performance of the electromagnetic shielding coating is automatically adjusted to achieve the best electromagnetic shielding effect.

[0034] Preferably, among them:

[0035] Specific implementation methods of heat dissipation design include:

[0036] Heat conduction path design inside the module: By reasonably arranging heat-conducting materials (such as heat-conducting silica gel, graphite heat sinks, etc.), heat dissipation channels are designed inside the module to effectively conduct the heat generated during the operation of the module to the outside, avoiding performance degradation caused by overheating.

[0037] Application of heat dissipation film: A graphene heat dissipation film is coated on the external surface of the module to improve the heat conduction performance, enabling heat to be more effectively dissipated into the surrounding environment and reducing the temperature rise.

[0038] Optimization of heat dissipation performance: By adding heat dissipation fins, heat dissipation tubes, etc. in the module structure design, the heat dissipation capacity of the module is further enhanced to ensure that the module can operate stably under high-load conditions.

[0039] Preferably, among them:

[0040] Optimization of the shielding layer thickness: According to the actual operating frequency and the intensity of electromagnetic interference, the thicknesses of the outer metal shielding layer, the middle wave-absorbing layer, and the inner conductive coating are adjusted to optimize the electromagnetic shielding effect. The total thickness of the shielding layer is generally 1 mm to 3 mm to balance effectiveness and the volume limitation of the module.

[0041] Coordinated design of the electromagnetic shielding layer and signal transmission: In the design, materials with high electromagnetic shielding efficiency are used, and at the same time, the design of the signal transmission path is optimized to avoid the attenuation effect of the shielding layer on the signal and ensure the quality of audio signals.

[0042] Compared with the prior art, the present invention provides an electromagnetic shielding method for a high-density integrated wireless audio module, having the following beneficial effects:

[0043] 1. The electromagnetic shielding method of this high-density integrated wireless audio module, by adopting a multi-layer shielding structure and an intelligent heat dissipation design, not only effectively reduces electromagnetic interference, but also avoids excessive increase in external volume, maintaining the miniaturization and lightweight of the wireless audio module. Compared with the existing technology that requires a large amount of expensive shielding materials, by optimizing the selection of shielding materials and the intelligent heat dissipation design, the overall manufacturing cost is effectively reduced.

[0044] 2. The electromagnetic shielding method of this high-density integrated wireless audio module, through the application of heat-conducting materials and heat dissipation films, avoids the problem that the traditional metal shielding layer affects heat dissipation, ensures that the wireless audio module can still work stably under high load, and avoids electromagnetic interference or equipment failure caused by heat accumulation. By adopting signal path isolation and filtering technologies, the attenuation of the shielding structure to audio signals is reduced, ensuring the clarity and stability of audio transmission and reducing noise and distortion.

[0045] 3. The electromagnetic shielding method of this high-density integrated wireless audio module, through the adaptive electromagnetic shielding material to adjust the frequency according to different usage environments, improves the adaptability of the wireless audio module in various electromagnetic environments and enhances the anti-interference ability of the module. Detailed implementation manners

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0047] Embodiment

[0048] An embodiment of the electromagnetic shielding method of a high-density integrated wireless audio module

[0049] An electromagnetic shielding method of a high-density integrated wireless audio module includes the following steps:

[0050] S1: Adopt a multi-layer shielding structure, and this multi-layer shielding structure includes the following three levels:

[0051] Outer metal shielding layer: Adopt metal materials with good electrical conductivity and corrosion resistance, such as aluminum alloy, copper alloy, etc., to cover the outer surface of the module for isolating external electromagnetic interference. The thickness of the outer metal shielding layer is generally 0.3 mm to 1 mm to ensure that it can effectively reflect or absorb external electromagnetic radiation.

[0052] Middle wave-absorbing layer: Located between the outer metal shielding layer and the inner conductive coating, it uses materials with high-frequency absorption properties, such as ferrite materials, conductive polymers, or carbon-based materials. The thickness of the wave-absorbing layer can be designed according to the electromagnetic characteristics of the working frequency band, generally ranging from 0.5 mm to 2 mm, and it can effectively attenuate high-frequency noise.

[0053] Inner conductive coating: In the circuit area inside the module, a thin-film type conductive coating is used, such as a silver-based coating, a copper-based coating, etc. The thickness of the conductive coating is generally from 5 μm to 30 μm, which can further improve the electromagnetic shielding effect of the internal discrete circuits and reduce the interference of internal noise.

[0054] S2: Intelligent heat dissipation design: Design a heat conduction path inside the wireless audio module, and use high thermal conductivity materials (such as thermal conductive silicone, graphene heat dissipation film, etc.) to guide and conduct the heat generated inside the module, avoiding performance degradation caused by the increased heat load due to electromagnetic shielding. The thermal conductivity of the thermal conductive material is generally greater than 150 W / m·K, which can ensure that the module still maintains an appropriate temperature during high-power operation.

[0055] S3: Signal isolation technology: In the PCB design of the wireless audio module, optimize the signal path layout, specifically including:

[0056] Physically isolate the high-frequency signal path from the low-frequency signal path to avoid electromagnetic interference between different signals.

[0057] Use an independent ground network (for example, split ground plane design) to provide independent electrical grounding for each signal channel and reduce cross-interference.

[0058] In the PCB layout, reasonably configure the distance between the signal and power lines to minimize the mutual coupling between the signal lines and the noise source.

[0059] S4: Application of adaptive electromagnetic shielding materials: Use materials with adjustable electromagnetic shielding performance in the external shielding layer, such as:

[0060] Adjustable frequency conductive coating: Adopt a conductive coating material that can adaptively adjust the electromagnetic shielding efficiency according to the working frequency. For example, use carbon nanotubes or metal-oxide composite coatings, which can dynamically adjust their shielding effect according to frequency changes.

[0061] Electromagnetic tuning coating: Use an electromagnetic tuning coating with frequency response characteristics to adapt to changes in different electromagnetic environments, thereby improving the adaptability and anti-interference ability of the module.

[0062] Specifically, among them:

[0063] The material of the outer metal shielding layer is selected as aluminum alloy or copper alloy, with a thickness of 0.5 mm to 1 mm, and the surface treatment adopts anodic oxidation or nickel plating process to improve corrosion resistance and durability.

[0064] The middle wave-absorbing layer uses ferrite material or conductive polymer, with a thickness of 0.5 mm to 1.5 mm, and has good high-frequency noise absorption performance. This wave-absorbing layer can effectively attenuate high-frequency electromagnetic waves above 1 GHz.

[0065] The inner conductive coating uses a copper-based conductive coating, with a coating thickness of 10 μm to 20 μm, and the resistivity of the coating is controlled within the range of 10^-5 Ω·cm to ensure good electromagnetic shielding effect.

[0066] The thermal conductive material is thermal conductive silica gel or graphene heat dissipation film, with a thermal conductivity greater than 200 W / m·K, which can ensure effective heat dissipation of the module during long-term operation and avoid performance degradation caused by overheating.

[0067] Specifically, among them:

[0068] The specific implementation methods of signal isolation technology include:

[0069] Physical isolation of signal paths: In PCB design, a multi-layer PCB structure is used to arrange high-frequency and low-frequency signals on different circuit layers respectively to reduce signal coupling.

[0070] Independent ground wire network design: Set up independent ground wires for each signal channel and arrange the ground wires as far apart as possible to avoid ground loop interference between different signal channels.

[0071] Use of filters: Install radio frequency filters or low-pass filters at the signal input and output ports to reduce unnecessary high-frequency noise transmission and improve signal quality.

[0072] Optimization of signal path layout: Optimize the distance between the signal path and the power path, separate high-frequency signals from noise sources (such as power supplies, digital circuits, etc.) as much as possible, and take appropriate shielding measures to protect the high-frequency signal path.

[0073] Specifically, among them:

[0074] The applications of adaptive electromagnetic shielding materials include:

[0075] Adjustable electromagnetic shielding coating: Coat a conductive coating with adjustable frequency on the outer metal shielding layer, and the electromagnetic shielding performance of the coating can be dynamically adjusted according to the electromagnetic frequency characteristics in the module's usage environment. This coating material can adapt to changes in different electromagnetic environments according to actual needs and enhance the shielding effect.

[0076] Electromagnetic Tuning Coating: The use of electromagnetic tuning coatings, such as composite-based coatings, can effectively shield electromagnetic waves in specific frequency bands and optimize the transmission quality of wireless signals.

[0077] Dynamic Adjustment of Electromagnetic Shielding Effect: During the operation of the module, by utilizing the changes in the external electromagnetic environment, through embedded sensors and intelligent control systems, the performance of the electromagnetic shielding coating is automatically adjusted to achieve the best electromagnetic shielding effect.

[0078] Specifically, among them:

[0079] Specific Implementation Methods of Heat Dissipation Design Include:

[0080] Internal Heat Conduction Path Design of the Module: By reasonably arranging heat-conducting materials (such as heat-conducting silica gel, graphite heat sinks, etc.), heat dissipation channels are designed inside the module to effectively conduct the heat generated during the operation of the module to the outside, avoiding performance degradation caused by overheating.

[0081] Application of Heat Dissipation Film: Coating graphene heat dissipation film on the outer surface of the module to improve the heat conduction performance, enabling heat to be dissipated more effectively into the surrounding environment and reducing the temperature rise.

[0082] Optimization of Heat Dissipation Performance: By adding heat dissipation fins, heat dissipation tubes and other structures in the module structure design, the heat dissipation capacity of the module is further enhanced to ensure that the module can operate stably under high-load conditions.

[0083] Specifically, among them:

[0084] Optimization of the Shielding Layer Thickness: According to the actual operating frequency and the intensity of electromagnetic interference, the thicknesses of the outer metal shielding layer, the middle wave-absorbing layer, and the inner conductive coating are adjusted to optimize the electromagnetic shielding effect. The total thickness of the shielding layer is generally 1 mm to 3 mm to balance effectiveness and the volume limitation of the module.

[0085] Coordinated Design of the Electromagnetic Shielding Layer and Signal Transmission: In the design, materials with high electromagnetic shielding efficiency are used, and at the same time, the design of the signal transmission path is optimized to avoid the attenuation effect of the shielding layer on the signal and ensure the quality of audio signals.

[0086] Through the above technical solutions, in the present invention, by adopting a multi-layer shielding structure and an intelligent heat dissipation design, it not only effectively reduces electromagnetic interference but also avoids excessive increase in external volume, maintaining the miniaturization and lightweight of the wireless audio module. Compared with the prior art that requires a large amount of expensive shielding materials, by optimizing the selection of shielding materials and the intelligent heat dissipation design, the overall manufacturing cost is effectively reduced. Through the application of heat-conducting materials and heat dissipation films, the problem that the traditional metal shielding layer affects heat dissipation is avoided, ensuring that the wireless audio module can still work stably under high load and avoiding electromagnetic interference or equipment failure caused by heat accumulation. By adopting signal path isolation and filtering technologies, the attenuation of the shielding structure to audio signals is reduced, ensuring the clarity and stability of audio transmission, reducing noise and distortion. By adjusting the frequency according to different usage environments with adaptive electromagnetic shielding materials, the adaptability of the wireless audio module in various electromagnetic environments is improved, and the anti-interference ability of the module is enhanced.

[0087] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic shielding method for a high-density integrated wireless audio module, characterized in that: It includes the following steps: S1: Adopt a multi-layer shielding structure, which includes the following three layers: Outer metal shielding layer: Use metal materials with good electrical conductivity and corrosion resistance, such as aluminum alloy, copper alloy, etc., to cover the outer surface of the module for isolating external electromagnetic interference. The thickness of the outer metal shielding layer is generally 0.3 mm to 1 mm to ensure effective reflection or absorption of external electromagnetic radiation. Middle wave-absorbing layer: Located between the outer metal shielding layer and the inner conductive coating, use materials with high-frequency absorption performance, such as ferrite materials, conductive polymers or carbon-based materials. The thickness of the wave-absorbing layer can be designed according to the electromagnetic characteristics of the working frequency band, generally 0.5 mm to 2 mm, which can effectively attenuate high-frequency noise. Inner conductive coating: In the circuit area inside the module, use thin-film conductive coatings, such as silver-based coatings, copper-based coatings, etc. The thickness of the conductive coating is generally 5 μm to 30 μm, which can further improve the electromagnetic shielding effect of the internal discrete circuits and reduce the interference of internal noise. S2: Intelligent heat dissipation design: Design a heat conduction path inside the wireless audio module, and use high thermal conductivity materials (such as thermal conductive silicone, graphene heat dissipation film, etc.) to guide and conduct the heat generated inside the module to avoid performance degradation caused by the increased heat load due to electromagnetic shielding. The thermal conductivity of the thermal conductive material is generally greater than 150 W / m·K to ensure that the module can still maintain an appropriate temperature during high-power operation. S3: Signal isolation technology: In the PCB design of the wireless audio module, optimize the signal path layout, specifically including: Physically isolate the high-frequency signal path from the low-frequency signal path to avoid electromagnetic interference between different signals. Use an independent ground wire network (for example, split ground plane design) to provide independent electrical grounding for each signal channel and reduce cross-interference. In the PCB layout, reasonably configure the distance between the signal and power lines to minimize the mutual coupling between the signal lines and the noise source. S4: Application of adaptive electromagnetic shielding materials: Use materials with adjustable electromagnetic shielding performance in the external shielding layer, such as: Adjustable frequency conductive coating: Adopt a conductive coating material that can adaptively adjust the electromagnetic shielding efficiency according to the working frequency. For example, use carbon nanotubes or metal-oxide composite coatings, which can dynamically adjust their shielding effect according to frequency changes. Electromagnetic tuning coating: Use an electromagnetic tuning coating with frequency response characteristics to adapt to changes in different electromagnetic environments, thereby improving the adaptability and anti-interference ability of the module.

2. The electromagnetic shielding method of a high-density integrated wireless audio module according to claim 1, characterized in that: Among them: The material of the outer metal shielding layer is selected as aluminum alloy or copper alloy, with a thickness of 0.5 mm to 1 mm, and the surface treatment adopts anodic oxidation or nickel plating process to improve corrosion resistance and durability. The middle wave-absorbing layer uses ferrite materials or conductive polymers, with a thickness of 0.5 mm to 1.5 mm, and has good high-frequency noise absorption performance. This wave-absorbing layer can effectively attenuate high-frequency electromagnetic waves above 1 GHz. The inner conductive coating uses a copper-based conductive coating, with a coating thickness of 10 μm to 20 μm, and the resistivity of the coating is controlled within the range of 10^-5 Ω·cm to ensure good electromagnetic shielding effect. The thermal conductive material is thermal conductive silicone or graphene heat dissipation film, with a thermal conductivity greater than 200 W / m·K, ensuring effective heat dissipation of the module during long-term operation and avoiding performance degradation caused by overheating.

3. The electromagnetic shielding method of a high-density integrated wireless audio module according to claim 1, characterized in that: Among them: The specific implementation methods of signal isolation technology include: Physical isolation of signal paths: In PCB design, a multi-layer PCB structure is used to arrange high-frequency and low-frequency signals on different circuit layers respectively, reducing signal coupling. Independent ground wire network design: Set independent ground wires for each signal channel and arrange the ground wires as separated as possible to avoid ground loop interference between different signal channels. Use of filters: Install RF filters or low-pass filters at signal input and output ports to reduce unnecessary high-frequency noise transmission and improve signal quality. Optimization of signal path layout: Optimize the distance between the signal path and the power path, separate high-frequency signals from noise sources (such as power supplies, digital circuits, etc.) as much as possible, and take appropriate shielding measures to protect the high-frequency signal path.

4. The electromagnetic shielding method of a high-density integrated wireless audio module according to claim 1, wherein: Among them: The applications of adaptive electromagnetic shielding materials include: Adjustable electromagnetic shielding coating: Coat a conductive coating with adjustable frequency on the external metal shielding layer. The electromagnetic shielding performance of the coating can be dynamically adjusted according to the electromagnetic frequency characteristics in the module's usage environment. This coating material can adapt to changes in different electromagnetic environments according to actual needs and enhance the shielding effect. Electromagnetic tuning coating: Adopt an electromagnetic tuning coating, such as a coating based on composite materials, which can effectively shield electromagnetic waves in specific frequency bands and optimize the transmission quality of wireless signals. Dynamic adjustment of electromagnetic shielding effect: During the operation of the module, utilize the changes in the external electromagnetic environment, and through embedded sensors and intelligent control systems, automatically adjust the performance of the electromagnetic shielding coating to achieve the best electromagnetic shielding effect.

5. The electromagnetic shielding method of a high-density integrated wireless audio module according to claim 1, characterized in that: Among them: The specific implementation methods of heat dissipation design include: Thermal conductive path design inside the module: By reasonably arranging thermal conductive materials (such as thermal conductive silicone, graphite heat sinks, etc.), design heat dissipation channels inside the module to effectively conduct the heat generated during the module's operation to the outside, avoiding performance degradation caused by overheating. Application of heat dissipation film: Coat graphene heat dissipation film on the external surface of the module to improve the heat conduction performance and make the heat dissipate more effectively into the surrounding environment, reducing the temperature rise. Optimization of heat dissipation performance: Further enhance the heat dissipation ability of the module by adding heat dissipation fins, heat dissipation tubes, etc. in the module structure design to ensure the stable operation of the module under high-load conditions.

6. According to the electromagnetic shielding method of a high-density integrated wireless audio module described in claim 1, characterized in that: Among them: Optimization of the shielding layer thickness: According to the actual operating frequency and the intensity of electromagnetic interference, adjust the thicknesses of the outer metal shielding layer, the middle wave-absorbing layer, and the inner conductive coating to optimize the electromagnetic shielding effect. The total thickness of the shielding layer is generally 1 mm to 3 mm to balance effectiveness and the volume limitation of the module. Coordinated design of the electromagnetic shielding layer and signal transmission: In the design, use materials with high electromagnetic shielding efficiency, and at the same time optimize the design of the signal transmission path to avoid the attenuation effect of the shielding layer on the signal and ensure the quality of audio signals.