Sound post audio processing system

Abstract

The utility model provides a kind of sound post audio processing system, by the cooperation of infrared frequency module and wireless receiving module, microphone and receiving end can be realized quickly pairing.It is second, microphone module supports multiple U section microphone signal input, and is transmitted to audio processing module by wireless receiving module, effectively enhance the multi-user adaptability of system.Third, audio processing module integrates mixing, filtering, amplification, dynamic compression and a variety of processing units such as double sound track separation, can significantly improve the definition and stability of audio signal, improve overall sound quality effect.In addition, system in output part cooperation power amplifier module and loudspeaker unit, realizes high-quality power amplification and sound amplification effect.Finally, through silent voice control monitoring mechanism, power amplifier module can be automatically closed when no effective signal input is detected, so as to reduce energy consumption and avoid meaningless signal amplification, further improve the energy saving and intelligent level of system.

Description

Technical Field

[0001] This utility model relates to the field of audio processing technology, and in particular to a sound column audio processing system. Background Technology

[0002] With the increasing demand for multimedia teaching, conference presentations, and public address amplification, column-type audio systems have been widely adopted. Traditional column-type audio processing systems typically consist of a microphone, power amplifier circuit, and speaker, enabling basic voice acquisition and amplification output. However, existing systems still have the following shortcomings in practical applications: First, the pairing method between the microphone and the receiver is relatively complex, affecting ease of use; second, some systems only support single-channel microphone input, lacking the ability to process multiple signals, making it difficult to meet the needs of scenarios where multiple people speak simultaneously; third, traditional audio processing units have relatively limited functionality, often unable to perform multi-level mixing, filtering, dynamic range compression, etc., resulting in poor output sound quality; fourth, existing power amplifier modules have low energy efficiency, easily overheating during prolonged operation and consuming a lot of energy; fifth, the lack of detection and control for invalid audio inputs often results in the amplifier continuing to operate even without an input signal, causing energy waste and introducing background noise.

[0003] In summary, the problems existing in the current technology urgently need to be solved. Utility Model Content

[0004] This utility model provides a sound column audio processing system to overcome the deficiencies in the prior art and optimize all aspects of audio signal acquisition, transmission, processing and output.

[0005] This utility model provides a column audio processing system, including: a microphone module, an infrared frequency matching module, a wireless receiving module, an audio processing module, and an output module; The microphone module is used to collect audio signals and transmit them wirelessly to the wireless receiving module; The infrared frequency pairing module is wirelessly connected to the microphone module and electrically connected to the wireless receiving module, and is used to realize the pairing between the microphone module and the wireless receiving module; The wireless receiving module has its output end connected to the audio processing module, and is used to receive the audio signal transmitted by the microphone module and send the audio signal to the audio processing module; The audio processing module is used to process the audio signal and output the processed audio signal to the output module; The output module has its input terminal connected to the output terminal of the audio processing module, and is used to output the amplified audio signal.

[0006] According to the present invention, a sound column audio processing system includes a microphone module comprising: The first UHF microphone is used to collect the first audio signal and send it to the wireless receiving module; The second U-band microphone is used to collect the second audio signal and send it to the wireless receiving module.

[0007] According to the present invention, a sound column audio processing system is provided, wherein the wireless receiving module is used to receive audio signals from the first UHF microphone and the second UHF microphone, and output the two audio signals to the audio processing module respectively.

[0008] According to the present invention, a sound column audio processing system is provided, wherein the wireless receiving module includes a UHF receiving unit and an analog-to-digital converter chip; The U-band receiving unit is used to receive the wireless audio signal sent by the U-band microphone and convert it into an analog audio signal; The analog-to-digital converter chip is used to convert analog audio signals into digital audio signals for subsequent audio processing modules.

[0009] According to the present invention, the audio processing system for sound columns is provided in which the analog-to-digital converter chip is a high-resolution Σ-Δ type analog-to-digital converter chip.

[0010] According to the present invention, a sound column audio processing system is provided, wherein the audio processing module includes a first mixing unit, a second mixing unit, a first filtering and amplification unit, a second filtering and amplification unit, a compression and limiting control chip, and a dual-channel active low-pass filter; The first mixing unit has its input terminal connected to the output terminal of the wireless receiving module, and is used to perform mixing processing on the signals from the two microphone modules. The first filtering and amplifying unit has its input end connected to the output end of the first mixing unit, and is used to filter and amplify the mixed audio signal; The second mixing unit has its input terminal connected to the output terminal of the wireless receiving module and its output terminal connected to the compression control chip, and is used to perform secondary mixing of the output signal of the recording terminal and the audio signal of the wireless receiving module. The compression control chip is used to perform dynamic range compression on the audio signal of the secondary mixing. The second filtering and amplifying unit has its input end connected to the output end of the compression control chip, and is used to filter and amplify the compressed audio signal; The dual-channel active low-pass filter has its input end connected to the output end of the second filter amplification unit, and is used to separate the audio signal into left and right dual-channel outputs, which are then output to the output module.

[0011] The audio processing system for sound columns provided by this utility model also includes a recording and broadcasting terminal; The recording and playback terminal has its input end connected to the first filtering and amplification unit, and is used to record or play the audio signal; The second mixing unit, whose input is also connected to the output of the recording terminal, is also used to perform secondary mixing on the output signal of the recording terminal.

[0012] According to the audio processing system for sound columns provided by this utility model, the audio processing module further includes: The silent control monitoring unit has its input terminal connected to the output terminal of the second mixing unit. It is used to detect whether the audio signal contains a valid signal and to shut down the output module when no valid signal is detected.

[0013] According to the present invention, a column audio processing system is provided, wherein the output module includes a power amplifier unit and a speaker unit; The power amplifier unit has its input terminal connected to the output terminal of the audio processing module, and is used to amplify the power of the processed audio signal. The speaker unit has its input terminal connected to the output terminal of the power amplifier unit, and is used to output the amplified audio signal.

[0014] According to the present invention, a sound column audio processing system is provided, wherein the power amplifier unit adopts a Class D power amplifier circuit, the Class D power amplifier circuit includes a PWM modulation component and a MOSFET power output component, the PWM modulation component is used to convert the analog audio signal into a pulse width modulation signal, and the MOSFET power output component is used to amplify the power of the pulse width modulation signal.

[0015] The audio processing system provided by this invention enables rapid pairing of the microphone and receiver through the cooperation of an infrared frequency matching module and a wireless receiving module, improving the system's ease of use. Secondly, the microphone module supports multiple UHF microphone signal inputs, which are transmitted to the audio processing module via the wireless receiving module, effectively enhancing the system's multi-user adaptability. Thirdly, the audio processing module integrates multiple processing units such as mixing, filtering, amplification, dynamic compression, and dual-channel separation, significantly improving the clarity and stability of the audio signal and enhancing the overall sound quality. Furthermore, the system's output section, in conjunction with a power amplifier module and speaker unit, achieves high-quality power amplification and sound reinforcement. Finally, through a silent control monitoring mechanism, the power amplifier module can be automatically shut down when no valid signal input is detected, thereby reducing energy consumption and avoiding meaningless signal amplification, further improving the system's energy efficiency and intelligence. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the module of the sound column audio processing system provided by this utility model; Figure 2 This is a schematic diagram of the structure of the wireless receiving module provided by this utility model; Figure 3 This is a schematic diagram of the audio processing module provided by this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] To address the problems in the existing technology, this utility model proposes a sound column audio processing system to optimize each stage of audio signal acquisition, transmission, processing, and output.

[0020] The following is a description of the audio processing system for the sound column, such as... Figure 1 As shown, it includes: a microphone module, an infrared frequency pairing module, a wireless receiving module, an audio processing module, and an output module; The microphone module is used to collect audio signals and transmit them wirelessly to the wireless receiving module; The infrared frequency pairing module is wirelessly connected to the microphone module and electrically connected to the wireless receiving module, and is used to realize the pairing between the microphone module and the wireless receiving module; The wireless receiving module has its output end connected to the audio processing module, and is used to receive the audio signal transmitted by the microphone module and send the audio signal to the audio processing module; The audio processing module is used to process the audio signal and output the processed audio signal to the output module; The output module has its input terminal connected to the output terminal of the audio processing module, and is used to output the amplified audio signal.

[0021] The microphone module is used to collect ambient audio signals. Internally, it includes an audio acquisition unit that converts sound signals into electrical signals. The module also includes a wireless transmission unit for wirelessly transmitting the collected audio signals to a wireless receiving module. During use, the microphone module can be started or stopped via a button or automatic detection.

[0022] The infrared pairing module is used to pair the microphone module and the wireless receiver module. The infrared pairing module connects wirelessly to the microphone module to receive pairing information from it, and electrically to the wireless receiver module to send a pairing signal, enabling the wireless receiver module to recognize the corresponding microphone module and thus complete the pairing. Users can quickly pair using the infrared pairing module without manually entering a pairing code.

[0023] The wireless receiver module is equipped with a receiving unit for receiving audio signals transmitted from the microphone module and demodulating the signals. The output of the wireless receiver module connects to the audio processing module, transmitting the received audio signals there. The wireless receiver module supports various wireless communication protocols, such as Bluetooth, Wi-Fi, or dedicated radio frequency protocols, to adapt to different application scenarios.

[0024] The audio processing module processes the received audio signal. Specific processing includes, but is not limited to, signal amplification, noise reduction, equalization, echo suppression, and dynamic compression. The output of the audio processing module connects to the output module, sending the processed audio signal there. Through the optimized processing by the audio processing module, the clarity and quality of the audio signal can be effectively improved.

[0025] The input terminal of the output module connects to the output terminal of the audio processing module to output the processed audio signal. The output module may include a speaker, headphone jack, or other audio output device to amplify the audio signal for user listening. The output module can be configured with volume adjustment functionality to suit different audio output needs in various scenarios.

[0026] As a further optional embodiment, the microphone module includes: The first UHF microphone is used to collect the first audio signal and send it to the wireless receiving module; The second U-band microphone is used to collect the second audio signal and send it to the wireless receiving module.

[0027] In this embodiment, by setting up a first UHF microphone and a second UHF microphone, this embodiment can simultaneously collect audio signals from different directions or different sound sources, thereby achieving a stereo effect or multi-channel audio processing. After receiving the signals from the first UHF microphone and the second UHF microphone, the wireless receiving module can transmit them separately or in combination to the audio processing module, which will then process them independently or jointly to optimize sound quality and spatial perception.

[0028] In this optional embodiment, the microphone module's multi-channel audio signal acquisition can be paired independently or uniformly with the infrared frequency pairing module, enabling each audio signal to be reliably identified and processed by the wireless receiving module, thereby improving the system's flexibility and scalability.

[0029] As a further optional embodiment, the wireless receiving module is used to receive audio signals from the first UHF microphone and the second UHF microphone, and output the two audio signals to the audio processing module respectively.

[0030] In this embodiment, the wireless receiving module may include multiple receiving channels or multiple demodulation units for simultaneously receiving and processing audio signals from multiple microphones, thereby ensuring that each audio signal can be transmitted and processed independently. After receiving two audio signals from the wireless receiving module, the audio processing module can perform independent signal processing, such as independent amplification, equalization adjustment, noise reduction, or stereo synthesis, to improve sound quality and spatial sense.

[0031] With the above configuration, this optional embodiment achieves reliable acquisition, transmission and processing of multi-microphone, multi-channel audio signals, enhancing the system's audio performance and application flexibility, and is suitable for scenarios such as meetings, teaching, speeches and home entertainment.

[0032] As a further optional embodiment, the wireless receiving module includes a UHF receiving unit and an analog-to-digital converter chip; The U-band receiving unit is used to receive the wireless audio signal sent by the U-band microphone and convert it into an analog audio signal; The analog-to-digital converter chip is used to convert analog audio signals into digital audio signals for subsequent audio processing modules.

[0033] In this embodiment, as Figure 2 As shown, the UHF receiver unit works in conjunction with the analog-to-digital converter chip to ensure that the wireless audio signals sent from the microphone module are reliably received and converted into a signal format suitable for digital processing, thereby improving the accuracy of audio processing and the overall sound quality of the system. With this configuration, the audio processing module can perform independent or combined digital processing on audio signals from multiple microphones, including digital amplification, noise reduction, equalization, and stereo synthesis, to meet the needs of different application scenarios.

[0034] As a further optional embodiment, the analog-to-digital converter chip is a high-resolution Σ-Δ type analog-to-digital converter chip.

[0035] In this embodiment, a Σ-Δ analog-to-digital converter chip is used to perform high-precision, high-linearity digital conversion of the analog audio signal from the UHF receiver unit, thereby significantly improving the processing accuracy and sound quality of subsequent audio processing modules. Through high-resolution digital processing, this embodiment can better preserve the details of the original audio signal, achieving clear, low-distortion audio output, suitable for high-quality audio acquisition and playback applications, such as conference recording, stage performances, and home entertainment.

[0036] As a further optional embodiment, the audio processing module includes a first mixing unit, a second mixing unit, a first filtering and amplification unit, a second filtering and amplification unit, a compression and limiting control chip, and a dual-channel active low-pass filter; The first mixing unit has its input terminal connected to the output terminal of the wireless receiving module, and is used to perform mixing processing on the signals from the two microphone modules. The first filtering and amplifying unit has its input end connected to the output end of the first mixing unit, and is used to filter and amplify the mixed audio signal; The second mixing unit has its input terminal connected to the output terminal of the wireless receiving module and its output terminal connected to the compression control chip, and is used to perform secondary mixing of the output signal of the recording terminal and the audio signal of the wireless receiving module. The compression control chip is used to perform dynamic range compression on the audio signal of the secondary mixing. The second filtering and amplifying unit has its input end connected to the output end of the compression control chip, and is used to filter and amplify the compressed audio signal; The dual-channel active low-pass filter has its input end connected to the output end of the second filter amplification unit, and is used to separate the audio signal into left and right dual-channel outputs, which are then output to the output module.

[0037] In this embodiment, as Figure 3 As shown, the input of the first mixing unit is connected to the output of the wireless receiving module, and is used to mix the signals from the two microphone modules to obtain a single-path mixed audio signal; its output is connected to the first filtering and amplifying unit. The first filtering and amplifying unit is used to filter and amplify the mixed signal output by the first mixing unit, thereby suppressing high-frequency noise and increasing the signal amplitude, providing a stable audio signal source for subsequent processing.

[0038] The input of the second mixing unit is also connected to the output of the wireless receiving module, and its output is connected to the compression / limiting control chip. This chip performs a secondary mixing of the audio output signal from the recording terminal and the audio signal from the wireless receiving module to synthesize a multi-source audio signal. The compression / limiting control chip is used to perform dynamic range compression on the audio signal output by the second mixing unit, limiting signal amplitude fluctuations and preventing signal distortion.

[0039] The input of the second filtering and amplifying unit is connected to the output of the compression and limiting control chip, and is used to filter and amplify the compressed audio signal to further optimize the sound quality. Subsequently, the input of the dual-channel active low-pass filter is connected to the output of the second filtering and amplifying unit, which separates the processed audio signal into left and right dual-channel outputs and outputs them to the output module for playback by speakers or headphones.

[0040] With the above configuration, this embodiment can realize the entire process of audio signal processing from microphone acquisition to final output, taking into account signal mixing, dynamic compression, filtering and amplification, and left and right channel separation, ensuring the clarity and stability of audio signals, while meeting the high-fidelity output requirements of recording and broadcasting systems.

[0041] As a further optional embodiment, a recording and broadcasting terminal is also included; The recording and playback terminal has its input end connected to the first filtering and amplification unit, and is used to record or play the audio signal; The second mixing unit, whose input is also connected to the output of the recording terminal, is also used to perform secondary mixing on the output signal of the recording terminal.

[0042] In this embodiment, the system also includes a recording and playback terminal, further improving the audio signal acquisition and playback functions. The input terminal of the recording and playback terminal is connected to the output terminal of the first filtering and amplification unit, and is used to record or directly play the filtered and amplified audio signal, thereby realizing the audio data storage or real-time playback function.

[0043] Furthermore, the input of the second mixing unit is also connected to the output of the recording terminal, for secondary mixing of the audio signal played by the recording terminal and the audio signal transmitted by the wireless receiving module. Through secondary mixing, the system can integrate the audio output of the recording terminal into the final mixed audio while maintaining the original microphone acquisition signal, achieving unified processing and output of multi-source audio.

[0044] In this embodiment, with the above configuration, the audio processing module can complete the entire process from microphone signal acquisition, filtering and amplification, recording and playback, to multi-source audio secondary mixing and left and right channel separation output. This configuration not only improves the clarity and stability of the audio signal, but also enables the system to have recording, playback, and multi-source mixing functions, meeting the demand for high-fidelity audio output in recording and broadcasting scenarios.

[0045] As a further optional embodiment, the audio processing module further includes: The silent control monitoring unit has its input terminal connected to the output terminal of the second mixing unit. It is used to detect whether the audio signal contains a valid signal and to shut down the output module when no valid signal is detected.

[0046] In this embodiment, the audio processing module further includes a silent control monitoring unit. The input of the silent control monitoring unit is connected to the output of the second mixing unit, and it is used to detect whether the audio signal contains valid audio content. When no valid signal input is detected in the audio signal, the silent control monitoring unit can control the output module to shut down, thereby preventing invalid noise or silent signals from being played, improving system efficiency and auditory experience.

[0047] By introducing a silent control monitoring unit, this embodiment not only realizes functions such as audio signal acquisition, mixing, filtering and amplification, dynamic compression and limiting, left and right channel output, and recording and playback, but also can automatically mute when the audio signal is invalid, effectively saving system resources and improving audio output quality.

[0048] As a further optional embodiment, the output module includes a power amplifier unit and a speaker unit; The power amplifier unit has its input terminal connected to the output terminal of the audio processing module, and is used to amplify the power of the processed audio signal. The speaker unit has its input terminal connected to the output terminal of the power amplifier unit, and is used to output the amplified audio signal.

[0049] In this embodiment, the output module includes a power amplifier unit and a speaker unit. The input terminal of the power amplifier unit is connected to the output terminal of the audio processing module, and is used to amplify the power of the audio signal after filtering, amplification, mixing, and dynamic compression processing to meet the drive level required for playback by the speaker unit.

[0050] The input terminal of the speaker unit is connected to the output terminal of the power amplifier unit, which is used to convert the amplified audio signal into a sound wave signal and output it to achieve high-fidelity audio playback. With this configuration, the output module can effectively transmit the audio signal processed by the audio processing module to the user, achieving clear, stable sound output with sufficient sound pressure level.

[0051] In this embodiment, through the collaborative work of the power amplifier unit and the speaker unit, the system realizes a complete audio signal processing chain from audio signal acquisition and processing to final acoustic output, ensuring that the audio signal maintains high fidelity, left and right channel separation and dynamic stability at the playback end, meeting the application requirements of recording or real-time playback scenarios.

[0052] As a further optional embodiment, the power amplifier unit adopts a Class D power amplifier circuit, which includes a PWM modulation component and a MOSFET power output component. The PWM modulation component is used to convert the analog audio signal into a pulse width modulation signal, and the MOSFET power output component is used to amplify the power of the pulse width modulation signal.

[0053] In this embodiment, the power amplifier unit adopts a Class D power amplifier circuit. The Class D power amplifier circuit includes a PWM modulation component and a MOSFET power output component. The PWM modulation component is used to convert the analog audio signal into a pulse width modulation signal to achieve high-efficiency signal modulation; the MOSFET power output component is used to amplify the power of the pulse width modulation signal, thereby driving the subsequent speaker unit to emit sound wave signals.

[0054] By employing a Class D power amplifier circuit, this embodiment can significantly improve power conversion efficiency, reduce power amplifier heat generation, and ensure high-fidelity transmission and output stability of audio signals, enabling the output module to achieve energy saving and long-term stable operation while meeting power requirements.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sound column audio processing system, characterized in that, include: Microphone module, infrared frequency pairing module, wireless receiver module, audio processing module, and output module; The microphone module is used to collect audio signals and transmit them wirelessly to the wireless receiving module; The infrared frequency pairing module is wirelessly connected to the microphone module and electrically connected to the wireless receiving module, and is used to realize the pairing between the microphone module and the wireless receiving module; The wireless receiving module has its output end connected to the audio processing module, and is used to receive the audio signal transmitted by the microphone module and send the audio signal to the audio processing module; The audio processing module is used to process and amplify the audio signal, and output the processed audio signal to the output module; The output module has its input terminal connected to the output terminal of the audio processing module, and is used to output the amplified audio signal.

2. The audio processing system for sound columns according to claim 1, characterized in that, The microphone module includes: The first UHF microphone is used to collect the first audio signal and send it to the wireless receiving module; The second U-band microphone is used to collect the second audio signal and send it to the wireless receiving module.

3. The audio processing system for sound columns according to claim 2, characterized in that, The wireless receiving module is used to receive audio signals from the first UHF microphone and the second UHF microphone, and output the two audio signals to the audio processing module respectively.

4. The audio processing system for sound columns according to claim 3, characterized in that, The wireless receiving module includes a first UHF receiving unit, a second UHF receiving unit, and an analog-to-digital converter chip; The first U-band receiving unit is used to receive the wireless audio signal sent by the first U-band microphone and convert it into an analog audio signal; The second U-band receiving unit is used to receive the wireless audio signal sent by the second U-band microphone and convert it into an analog audio signal; The analog-to-digital converter chip is used to convert analog audio signals into digital audio signals for subsequent audio processing modules.

5. The audio processing system for sound columns according to claim 4, characterized in that, The analog-to-digital converter chip is a high-resolution Σ-Δ type analog-to-digital converter chip.

6. The audio processing system for sound columns according to claim 1, characterized in that, The audio processing module includes a first mixing unit, a second mixing unit, a first filtering and amplification unit, a second filtering and amplification unit, a compression and limiting control chip, and a dual-channel active low-pass filter. The first mixing unit has its input terminal connected to the output terminal of the wireless receiving module, and is used to perform mixing processing on the signals from the two microphone modules. The first filtering and amplifying unit has its input end connected to the output end of the first mixing unit, and is used to filter and amplify the mixed audio signal; The second mixing unit has its input terminal connected to the output terminal of the wireless receiving module and its output terminal connected to the compression control chip, and is used to perform secondary mixing of the output signal of the recording terminal and the audio signal of the wireless receiving module. The compression control chip is used to perform dynamic range compression on the audio signal of the secondary mixing. The second filtering and amplifying unit has its input end connected to the output end of the compression control chip, and is used to filter and amplify the compressed audio signal; The dual-channel active low-pass filter has its input end connected to the output end of the second filter amplification unit, and is used to separate the audio signal into left and right dual-channel outputs, which are then output to the output module.

7. The audio processing system for sound columns according to claim 6, characterized in that, It also includes recording and broadcasting terminals; The recording and playback terminal has its input end connected to the first filtering and amplification unit, and is used to record or play the audio signal; The second mixing unit, whose input is also connected to the output of the recording terminal, is also used to perform secondary mixing on the output signal of the recording terminal.

8. The audio processing system for sound columns according to claim 6, characterized in that, The audio processing module further includes: The silent control monitoring unit has its input terminal connected to the output terminal of the second mixing unit. It is used to detect whether the audio signal contains a valid signal and to shut down the output module when no valid signal is detected.

9. The audio processing system for sound columns according to claim 1, characterized in that, The output module includes a power amplifier unit and a speaker unit; The power amplifier unit has its input terminal connected to the output terminal of the audio processing module, and is used to amplify the power of the processed audio signal. The speaker unit has its input terminal connected to the output terminal of the power amplifier unit, and is used to output the amplified audio signal.

10. The audio processing system for sound columns according to claim 9, characterized in that, The power amplifier unit adopts a Class D power amplifier circuit, which includes a PWM modulation component and a MOSFET power output component. The PWM modulation component is used to convert the analog audio signal into a pulse width modulation signal, and the MOSFET power output component is used to amplify the power of the pulse width modulation signal.

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