A teaching sound reinforcement system
By integrating teaching sound reinforcement, AI interaction, and IP broadcasting, the system solves the problems of numerous devices, poor sound quality, and high cost in traditional teaching sound reinforcement systems. It achieves multi-functional integration and sound quality improvement, while reducing equipment complexity and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU BAOLUN ELECTRONICS CO LTD
- Filing Date
- 2025-09-12
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional classroom sound reinforcement systems suffer from numerous devices, poor sound quality, and high costs. Furthermore, they cannot integrate IP broadcasting functionality, resulting in a noisy classroom environment and complex equipment.
Design a system that integrates teaching sound reinforcement, AI interaction, and IP broadcasting. It adopts a hanging microphone module, a wireless microphone module, a DSP audio processing module, an IP broadcasting module, an ESP32-AI module, a DAC conversion module, and a power amplifier module. The system realizes audio signal processing and transmission through the connection between modules, and combines AI technology to improve sound quality and reduce equipment complexity.
It achieves multi-functional integration, improves the efficiency of the teaching sound reinforcement system, reduces equipment costs, and enhances the teaching environment of the classroom by improving sound quality through AI technology.
Smart Images
Figure CN224583298U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sound amplification equipment technology, and in particular to a teaching sound amplification system. Background Technology
[0002] During classroom sound reinforcement, sounds from the classroom, including student conversations and page-turning sounds, are picked up and amplified, making the already noisy classroom environment even noisier, which is not conducive to teaching and learning. In addition, traditional IP broadcasting technology solutions usually require the use of IP broadcasting equipment to transmit analog audio signals through analog lines, which has problems such as poor sound quality and instability. Moreover, the circuit scheme is relatively complex and costly. Therefore, IP broadcasting technology has not been integrated into the system, resulting in classrooms needing multiple sets of equipment, which is cumbersome. Therefore, there is a need for an integrated classroom sound reinforcement system. Utility Model Content
[0003] To address the aforementioned issues, this utility model provides a teaching sound reinforcement system that integrates teaching sound reinforcement, AI interaction, and IP broadcasting. It can meet the teaching sound reinforcement needs of teachers in classrooms, as well as the academic affairs office's needs for task notifications and exam audio playback. This solves the problem of requiring multiple systems in the past and reduces the school's teaching costs.
[0004] To achieve the above objectives, this utility model provides the following solution:
[0005] A teaching sound reinforcement system includes: a suspended microphone module, a wireless microphone module, a DSP audio processing module, an IP broadcasting module, an ESP32-AI module, a DAC conversion module, a power amplifier module, and a speaker. The ESP32-AI module includes a first audio codec unit, an ESP32 audio processing unit, and a first Ethernet transceiver unit. The output of the suspended microphone is connected to the input of the DSP audio processing module, the output of the wireless microphone is connected to the input, the output of the IP broadcasting module is connected to the input of the DSP audio processing module, the output of the ESP32-AI module is connected to the input of the DSP audio processing module, the output of the DSP audio processing module is connected to the input of the DAC conversion module, and the output of the DAC conversion module is connected to the input of the power amplifier board.
[0006] In the ESP32-AI module, the first Ethernet transceiver unit of the ESP32-AI module is an input terminal, the output terminal of the first Ethernet transceiver unit is connected to the input terminal of the ESP32 audio processing unit, the output terminal of the ESP32 audio processing unit is connected to the input terminal of the first audio codec unit, the output terminal of the first audio codec unit is connected to the input terminal of the DSP audio processing module, and the output terminal of the DAC conversion module is connected to the input terminal of the first audio codec unit.
[0007] Preferably, the suspended microphone module includes a suspended microphone, a first ADC conversion unit, and a suspended microphone board. The output terminal of the suspended microphone is connected to the input terminal of the first ADC conversion unit, the output terminal of the first ADC conversion unit is connected to the input terminal of the suspended microphone board, and the output terminal of the suspended microphone board is connected to the input terminal of the DSP audio processing module.
[0008] Preferably, the wireless microphone module includes a wireless handheld microphone, a UHF board, and a second ADC conversion unit. The wireless handheld microphone is used to transmit UHF signals, the UHF board is used to receive UHF signals, the output terminal of the UHF board is connected to the input terminal of the second ADC conversion unit, and the output terminal of the second ADC conversion unit is connected to the input terminal of the DSP audio processing module.
[0009] Preferably, the IP broadcast module includes a second Ethernet transceiver unit, a broadcast audio processing unit, and a second audio codec unit. The output of the second Ethernet transceiver unit is connected to the input of the broadcast audio processing unit, the output of the broadcast audio processing unit is connected to the input of the second audio codec unit, and the output of the second audio codec unit is connected to the input of the DSP audio processing module.
[0010] Preferably, the system further includes a third ADC conversion unit, the input of which is connected to the output of the first audio codec unit and the output of the second audio codec unit, and the output of which is connected to the input of the DSP audio processing module.
[0011] Preferably, the ESP32 audio processing unit includes resistors R68, R69, and R70, capacitors C96, C97, C98, C99, C100, C101, C105, and C106, an inductor L1, a passive crystal oscillator U14, and an ESP32 chip U15. The ESP32 chip U15 has 57 pins. The second pin of the ESP32 chip U15 is connected to one end of capacitor C100 and one end of inductor L1, respectively. The other end of capacitor C100 is grounded, and the other end of inductor L1 is connected to a positive voltage source. The third pin of the ESP32 chip U15 is connected to the second pin. Pin 0 is connected to one end of capacitor C103 and a voltage source, respectively. The other end of capacitor C103 is grounded. Pin 29 of ESP32 chip U15 is connected to the power input and one end of capacitor C106, respectively. The other end of capacitor C106 is grounded. Pin 46 of ESP32 chip U15 is connected to a positive voltage source and one end of capacitor C101, respectively. The other end of capacitor C101 is grounded. Pin 55 of ESP32 chip U15 is connected to pin 56 of ESP32 chip U15. Pin 56 of ESP32 chip U15 is connected to a positive voltage source and one end of capacitor C98, respectively. The other end of capacitor C98 is grounded. Capacitor C99 is connected in parallel across capacitor C98.
[0012] Preferably, the passive crystal oscillator U14 includes four pins. The first pin of the passive crystal oscillator U14 is connected to one end of the capacitor C97, and the other end of the capacitor C97 is grounded. The second pin of the passive crystal oscillator U14 is grounded. The third pin of the passive crystal oscillator U13 is connected to one end of the capacitor C96, and the other end of the capacitor C96 is grounded. The fourth pin of the passive crystal oscillator U14 is grounded.
[0013] Preferably, the flash memory U17 includes 8 pins, wherein pin 1 is connected to one end of resistor R69, pin 7 is connected to one end of resistor R68, the other ends of resistor R69 and resistor R68 are connected to a positive voltage source, pin 2 of flash memory U17 is connected to pin 34 of ESP32 chip U15, pin 3 of flash memory U17 is connected to one end of resistor R70, the other end of resistor R70 is grounded, pin 4 of flash memory U17 is grounded, pin 5 of flash memory U17 is connected to pin 35 of ESP32 chip U15, pin 6 of flash memory U17 is connected to pin 33 of ESP chip U15, and pin 8 of flash memory U17 is connected to a positive voltage source.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model adopts a traditional teaching sound reinforcement system, adds an AI voice circuit, and combines it with IP broadcasting function, thereby integrating multiple sound reinforcement functions, improving efficiency while reducing setup costs. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of a teaching sound reinforcement system.
[0016] Figure 2 This is a circuit diagram of the ESP32 chip in the ESP32 audio processing unit in this embodiment of the application.
[0017] Figure 3 This is a circuit diagram of the passive crystal oscillator section in the ESP32 audio processing unit in this embodiment.
[0018] Figure 4 This is a circuit diagram of the flash memory portion of the ESP32 audio processing unit in an embodiment of this application. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0021] like Figure 1 As shown, a teaching sound reinforcement system includes: a hanging microphone module, a wireless microphone module, a DSP audio processing module, an IP broadcasting module, an ESP32-AI module, a DAC conversion module, a power amplifier module, and a speaker. The ESP32-AI module includes a first audio codec unit, an ESP32 audio processing unit, and a first Ethernet transceiver unit. The output of the hanging microphone is connected to the input of the DSP audio processing module, the output of the wireless microphone is connected to the input, the output of the IP broadcasting module is connected to the input of the DSP audio processing module, the output of the ESP32-AI module is connected to the input of the DSP audio processing module, the output of the DSP audio processing module is connected to the input of the DAC conversion module, and the output of the DAC conversion module is connected to the input of the power amplifier board.
[0022] In the ESP32-AI module, the first Ethernet transceiver unit of the ESP32-AI module is an input terminal, the output terminal of the first Ethernet transceiver unit is connected to the input terminal of the ESP32 audio processing unit, the output terminal of the ESP32 audio processing unit is connected to the input terminal of the first audio codec unit, the output terminal of the first audio codec unit is connected to the input terminal of the DSP audio processing module, and the output terminal of the DAC conversion module is connected to the input terminal of the first audio codec unit.
[0023] In an optional embodiment, the suspended microphone module includes a suspended microphone, a first ADC conversion unit, and a suspended microphone board. The output terminal of the suspended microphone is connected to the input terminal of the first ADC conversion unit, the output terminal of the first ADC conversion unit is connected to the input terminal of the suspended microphone board, and the output terminal of the suspended microphone board is connected to the input terminal of the DSP audio processing module.
[0024] The hanging microphone picks up audio, and the analog audio signal is converted into a digital audio signal by the ADC digital-to-analog converter circuit and sent to the hanging microphone board for data processing. After the hanging microphone board processes the data, it transmits the data to the RK3562-DSP audio processor for further processing. The data is then transmitted to the DAC digital-to-analog converter circuit for decoding via the IIS signal transmission method. The digital audio signal is then converted back into an analog audio signal for output. Finally, the sound is amplified by the power amplifier board before being output.
[0025] In an optional embodiment, the wireless microphone module includes a wireless handheld microphone, a UHF board, and a second ADC conversion unit. The wireless handheld microphone is used to transmit UHF signals, the UHF board is used to receive UHF signals, the output terminal of the UHF board is connected to the input terminal of the second ADC conversion unit, and the output terminal of the second ADC conversion unit is connected to the input terminal of the DSP audio processing module.
[0026] After the wireless handheld microphone picks up the sound, it modulates the analog audio signal into a digital audio signal and then transmits the wireless signal via UHF. When the UHF board receives the UHF signal, it demodulates the signal into an analog audio signal and transmits it to the ADC analog-to-digital converter circuit to convert it into a digital audio signal. The signal is then transmitted to the RK3562-DSP audio processor for processing via IIS signal transmission. The data is then transmitted to the DAC digital-to-analog converter circuit for decoding via IIS signal transmission, converting the digital audio signal into an analog audio signal for output. Finally, the signal is amplified by the power amplifier board before being output as sound.
[0027] In an optional embodiment, the IP broadcast module includes a second Ethernet transceiver unit, a broadcast audio processing unit, and a second audio codec unit. The output of the second Ethernet transceiver unit is connected to the input of the broadcast audio processing unit, the output of the broadcast audio processing unit is connected to the input of the second audio codec unit, and the output of the second audio codec unit is connected to the input of the DSP audio processing module.
[0028] IP broadcasting uses network transmission. The Academic Affairs Office sends audio signals through a PC-based multimedia platform. After receiving the network packets, the IP broadcasting module decompresses them and outputs analog audio signals through the CL1026A. The analog signals are then converted into digital audio signals by the ADC analog-to-digital converter chip and transmitted to the RK3562-DSP audio processor for processing via IIS. The data is then transmitted to the DAC digital-to-analog converter circuit for decoding via IIS signal transmission, converting the digital audio signals into analog audio signals for output. Finally, the signal is amplified by the power amplifier board before being output as sound.
[0029] In an optional embodiment, a third ADC conversion unit is further included, the input of which is connected to the output of the first audio codec unit and the output of the second audio codec unit, and the output of which is connected to the input of the DSP audio processing module.
[0030] like Figure 2As shown, in an optional embodiment, the ESP32 audio processing unit includes resistors R68, R69, and R70, capacitors C96, C97, C98, C99, C100, C101, C105, and C106, an inductor L1, a passive crystal oscillator U14, and an ESP32 chip U15. The ESP32 chip U15 has 57 pins. The second pin of the ESP32 chip U15 is connected to one end of capacitor C100 and one end of inductor L1, respectively. The other end of capacitor C100 is grounded, and the other end of inductor L1 is connected to a positive voltage source. The third pin of the ESP32 chip U15 is connected to the second pin. Pin 20 of ESP32 chip U15 is connected to one end of capacitor C103 and a voltage source, with the other end of capacitor C103 grounded. Pin 29 of ESP32 chip U15 is connected to the power input and one end of capacitor C106, with the other end of capacitor C106 grounded. Pin 46 of ESP32 chip U15 is connected to a positive voltage source and one end of capacitor C101, with the other end of capacitor C101 grounded. Pin 55 of ESP32 chip U15 is connected to pin 56 of ESP32 chip U15. Pin 56 of ESP32 chip U15 is connected to a positive voltage source and one end of capacitor C98, with the other end of capacitor C98 grounded. Capacitor C99 is connected in parallel across capacitor C98.
[0031] Specifically, the ESP32 chip is model ESP32-S3. Pins 2 and 3 are analog power supply pins with an operating voltage range of 3.0V to 3.6V. Pin 20 is the VDD3P3_RTC pin, i.e., the RTC power supply pin. Pin 29 is the VDD_SPI pin, serving as the output power supply, powered by VDD3P3_CPU through a resistor, with a typical voltage of 3.3V. Pin 46 of the ESP32 chip U15 is the VDD3P3_CPU pin, i.e., the digital power supply pin, with an operating voltage range of 3.0V to 3.6V. Pins 55 and 56 of the ESP32 chip U15 are VDDA pins, i.e., analog power supply pins.
[0032] like Figure 3 As shown, in an optional embodiment, the passive crystal oscillator U14 includes four pins. The first pin of the passive crystal oscillator U14 is connected to one end of the capacitor C97, and the other end of the capacitor C97 is grounded. The second pin of the passive crystal oscillator U14 is grounded. The third pin of the passive crystal oscillator U14 is connected to one end of the capacitor C96, and the other end of the capacitor C96 is grounded. The fourth pin of the passive crystal oscillator U14 is grounded.
[0033] Specifically, the passive crystal oscillator U14 is a 26MHz passive crystal oscillator.
[0034] like Figure 4 As shown, in an optional embodiment, the flash memory U17 includes 8 pins, wherein pin 1 is connected to one end of resistor R69, pin 7 is connected to one end of resistor R68, the other ends of resistor R69 and resistor R68 are connected to a positive voltage source, pin 2 of flash memory U17 is connected to pin 34 of ESP32 chip U15, pin 3 of flash memory U17 is connected to one end of resistor R70, the other end of resistor R70 is grounded, pin 4 of flash memory U17 is grounded, pin 5 of flash memory U17 is connected to pin 35 of ESP32 chip U15, pin 6 of flash memory U17 is connected to pin 33 of ESP chip U15, and pin 8 of flash memory U17 is connected to a positive voltage source.
[0035] Specifically, the flash memory model is GD25Q64CSIG.
[0036] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0037] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.
Claims
1. A teaching sound reinforcement system, characterized by, include: The system includes a suspended microphone module, a wireless microphone module, a DSP audio processing module, an IP broadcasting module, an ESP32-AI module, a DAC conversion module, a power amplifier module, and a speaker. The ESP32-AI module comprises a first audio codec unit, an ESP32 audio processing unit, and a first Ethernet transceiver unit. The output of the suspended microphone module is connected to the input of the DSP audio processing module, the output of the wireless microphone module is connected to the input of the DSP audio processing module, the output of the IP broadcasting module is connected to the input of the DSP audio processing module, the output of the ESP32-AI module is connected to the input of the DSP audio processing module, the output of the DSP audio processing module is connected to the input of the DAC conversion module, and the output of the DAC conversion module is connected to the input of the power amplifier board. In the ESP32-AI module, the first Ethernet transceiver unit of the ESP32-AI module is an input terminal, the output terminal of the first Ethernet transceiver unit is connected to the input terminal of the ESP32 audio processing unit, the output terminal of the ESP32 audio processing unit is connected to the input terminal of the first audio codec unit, the output terminal of the first audio codec unit is connected to the input terminal of the DSP audio processing module, and the output terminal of the DAC conversion module is connected to the input terminal of the first audio codec unit.
2. A teaching sound reinforcement system according to claim 1, characterized in that The hanging microphone module includes a hanging microphone, a first ADC conversion unit, and a hanging microphone board. The output terminal of the hanging microphone is connected to the input terminal of the first ADC conversion unit, the output terminal of the first ADC conversion unit is connected to the input terminal of the hanging microphone board, and the output terminal of the hanging microphone board is connected to the input terminal of the DSP audio processing module.
3. A teaching sound reinforcement system according to claim 1, wherein, The wireless microphone module includes a wireless handheld microphone, a UHF board, and a second ADC conversion unit. The wireless handheld microphone is used to transmit UHF signals, the UHF board is used to receive UHF signals, the output terminal of the UHF board is connected to the input terminal of the second ADC conversion unit, and the output terminal of the second ADC conversion unit is connected to the input terminal of the DSP audio processing module.
4. A teaching public address system according to claim 1, wherein, The IP broadcast module includes a second Ethernet transceiver unit, a broadcast audio processing unit, and a second audio codec unit. The output of the second Ethernet transceiver unit is connected to the input of the broadcast audio processing unit, the output of the broadcast audio processing unit is connected to the input of the second audio codec unit, and the output of the second audio codec unit is connected to the input of the DSP audio processing module.
5. A teaching sound reinforcement system according to claim 4, characterized in that It also includes a third ADC conversion unit, the input of which is connected to the output of the first audio codec unit and the output of the second audio codec unit, and the output of which is connected to the input of the DSP audio processing module.
6. A teaching public address system according to claim 1, wherein, The ESP32 audio processing unit includes resistors R68, R69, and R70; capacitors C96, C97, C98, C99, C100, C101, C105, and C106; an inductor L1; a passive crystal oscillator U14; and an ESP32 chip U15. The ESP32 chip U15 has 57 pins. Pin 2 of the ESP32 chip U15 is connected to one end of capacitor C100 and one end of inductor L1. The other end of capacitor C100 is grounded, and the other end of inductor L1 is connected to a positive voltage source. Pin 3 of the ESP32 chip U15 is connected to pin 2. Pin 20 of the ESP32 chip U15... Pin 29 of the ESP32 chip U15 is connected to one end of capacitor C103 and a voltage source, respectively. The other end of capacitor C103 is grounded. Pin 29 of the ESP32 chip U15 is connected to the power input and one end of capacitor C106, respectively. The other end of capacitor C106 is grounded. Pin 46 of the ESP32 chip U15 is connected to a positive voltage source and one end of capacitor C101, respectively. The other end of capacitor C101 is grounded. Pin 55 of the ESP32 chip U15 is connected to pin 56 of the ESP32 chip U15. Pin 56 of the ESP32 chip U15 is connected to a positive voltage source and one end of capacitor C98, respectively. The other end of capacitor C98 is grounded. Capacitor C99 is connected in parallel across capacitor C98.
7. A teaching public address system according to claim 6, wherein, The passive crystal oscillator U14 includes four pins. The first pin of the passive crystal oscillator U14 is connected to one end of the capacitor C97, and the other end of the capacitor C97 is grounded. The second pin of the passive crystal oscillator U14 is grounded. The third pin of the passive crystal oscillator U13 is connected to one end of the capacitor C96, and the other end of the capacitor C96 is grounded. The fourth pin of the passive crystal oscillator U14 is grounded.
8. A teaching public address system according to claim 6, wherein, The ESP32 audio processing unit also includes flash memory U17, which has 8 pins. Pin 1 is connected to one end of resistor R69, pin 7 is connected to one end of resistor R68, and the other ends of resistors R69 and R68 are connected to a positive voltage source. Pin 2 of flash memory U17 is connected to pin 34 of ESP32 chip U15. Pin 3 of flash memory U17 is connected to one end of resistor R70, and the other end of resistor R70 is grounded. Pin 4 of flash memory U17 is grounded. Pin 5 of flash memory U17 is connected to pin 35 of ESP32 chip U15. Pin 6 of flash memory U17 is connected to pin 33 of ESP chip U15. Pin 8 of flash memory U17 is connected to a positive voltage source.