Digital audio control system and method

Abstract

The invention discloses a digital audio control system and method. The digital audio control system comprises a plurality of control devices and a plurality of earphone devices, the control device comprises a first Bluetooth module and a key module, and the earphone device comprises a second Bluetooth module and a microphone module; the earphone device communicates with the control device through the first Bluetooth module and the second Bluetooth module; the control devices are electrically connected with the audio devices, and each audio device is connected with one control device; the first button of the button module is pressed down to realize communication with the earphone device, the first Bluetooth module sends a communication protocol to the corresponding earphone device to realize communication, and the earphone device which is not matched with the first button cannot perform Bluetooth communication with the control device. The system is simple in structure, and can utilize the control device and the earphone device to cooperate with the existing audio equipment to carry out high-restoration-degree sound amplification on the voice of a teacher so as to reduce the burden of the throat of the teacher.

Description

Technical Field

[0001] The invention belongs to the field of educational digital conference control and amplification, and in particular relates to a digital audio control system and method. Background Art

[0002] Currently, teachers use two methods to amplify sound during lectures and meetings: one is the Little Bee loudspeaker. The sound quality of the Little Bee loudspeaker is not very good, there is pronunciation distortion, and sometimes even howling. It is also easily affected by electromagnetic interference from other radio waves. In addition, because the small speaker is hung around the teacher's waist, the sound propagation distance is limited. If it is close, the sound is too loud, and if it is far away, the sound is unclear. In particular, the small speakers of primary school teachers are placed at a height facing the ears of students sitting in their seats, which is very harmful to the students' ears. Students and parents also have great opinions on this. Some local education departments have even issued documents prohibiting the use of Little Bee loudspeakers.

[0003] Another method is to use a microphone to connect to speakers. Microphones include hand-held microphones, clip-on microphones, etc. These products have played a great role in reducing teachers' throat fatigue, but there are some shortcomings. For example, the hand-held microphone always needs to be held in one hand. As the hand shakes, the volume will change. Sometimes the hand will get tired if the lecture is too long. If the lecturer needs to use both hands (such as doing experiments, drawing, etc.), holding the microphone in one hand will affect the operation of both hands. Primary and secondary school teachers need to write a lot on the blackboard, and the amplitude of hand shaking will be greater. The space in primary and secondary school classrooms is limited, and the probability of howling is also high. The disadvantage of the clip-on microphone is that it is difficult to fix on the clothes when the clothes are thin, and it is easy to flip over. It is far away from the mouth and not directly in front of the mouth. The clarity of the sound is not ideal and the battery life is short.

[0004] Another way is to use a teacher-student interactive control system or an electronic classroom system. This device requires computers, central controllers, and a large number of students' mobile terminal devices. This system is expensive for China and a large number of underdeveloped regions around the world. These systems can only be used in a few developed regions, and can only be used in certain courses, such as experimental classes, art classes, etc., and have no effect; since each student has a mobile terminal device, it is also a great challenge for teachers to manage and control mobile terminal devices, especially for primary school students with weak self-control ability; when using these systems, teachers are still required to explain, and these systems do not have an original way to solve the problem of teacher throat fatigue, and are generally equipped with a microphone; the reality is that these systems have been launched for several years, but schools in developed areas rarely use such devices, and the disadvantages are still obvious. Therefore, it is very important to obtain a digital audio control system and method that overcomes the above defects. Summary of the invention

[0005] In order to solve at least one of the above technical problems, on one hand, the present invention provides a digital audio control system: comprising a plurality of control devices and a plurality of earphone devices;

[0006] The control device includes a first Bluetooth module and a button module, and the earphone device includes a second Bluetooth module and a microphone module; the earphone device communicates with the control device through the first Bluetooth module and the second Bluetooth module; the button module controls the first Bluetooth module to send a corresponding communication signal to the matching earphone device.

[0007] The microphone module is fixedly connected to the earphone device via a memory link, and the microphone module is electrically connected to the earphone device.

[0008] Through the above technical solution, the present invention can bend the memory link to bring the microphone module close to the user's mouth, and the distance can be adjusted as needed. Since the microphone head is very close to the mouth, the self-excitation phenomenon of the sound amplification device is better suppressed, and the occurrence of howling in the limited space of primary and secondary school classrooms is effectively prevented.

[0009] Or the howling can be weakened or eliminated by using existing algorithms.

[0010] An audio device is also included. The control device is electrically connected to the audio device. The control device receives the sound collected by the microphone module of the earphone device and outputs it through the speaker of the audio device.

[0011] The control device further comprises a first audio power amplifier module and a display screen module. The control device further comprises a first power supply port and a voltage stabilizing module.

[0012] The earphone device also includes a second audio power amplifier module, a second power supply port and a charging protection module.

[0013] The control device comprises a housing, the housing is provided with an installation cavity inwardly, the installation cavity is provided with an installation hole, the installation hole is smaller than the cross section of the installation cavity, and an elastic clamping arm cooperating with the installation hole is fixed in the installation cavity. A limit block is fixed in the housing, and there is a spacing between the limit block and the elastic clamping arm. A circuit board is fixed in the control housing, the first Bluetooth module, the key module, the first audio power amplifier module, the first power supply port and the voltage stabilizing module are installed on the circuit board, and a hollow is provided in the housing for exposing the display screen and the key module.

[0014] Through the above technical solution, the present invention is easy to install and fix. A plug-in can be installed on the wall, and the plug-in is inserted into the installation hole, and the elastic clamping arm resists the plug-in to achieve stable insertion.

[0015] The key module includes several subject keys, a switch key, a collection key, a volume key, a matching key and a disconnect key; the earphone device can be matched with the control device through the matching key when it is configured for the first time, and the disconnect key can be used to disconnect the communication when it needs to be disconnected. The earphone device is a bone conduction earphone, and the key module also includes a spare key.

[0016] A teaching audio control method comprises the following steps:

[0017] Each room is equipped with a control device and a headphone device, and the control device is electrically connected to the audio equipment;

[0018] Press the switch button of the key module in the control device to turn on the control device;

[0019] When the control device is powered on, press the matching button of the button module to match the communication protocols between the first Bluetooth module of the control device and the second Bluetooth module of the headphone device in each room;

[0020] When the subject button of the button module is pressed, the first Bluetooth module of the control device in the room and the second Bluetooth module of the earphone device are connected to each other by wireless communication, and the first Bluetooth module of the control device is shielded from the earphone devices in other rooms; and the code of the matched earphone device is displayed in the control device;

[0021] When the microphone module of the earphone device receives audio, the earphone device transmits the audio signal to the audio device through the first audio power amplifier module of the control device and plays the sound.

[0022] The above encryption method adopts the wireless communication protocol encoding method.

[0023] The earphone device can be connected to the teacher's own mobile phone while being connected to the control device.

[0024] Compared with the prior art, the advantages of the present invention are: the present invention has a simple structure, teachers lecture for too long every day and speak at a high volume, both of which cause great damage to the throat, and many teachers also suffer from pharyngitis, and some even suffer from occupational diseases. The present invention can use the control device and the headphone device in conjunction with the existing audio equipment to amplify the teacher's voice with high fidelity to reduce the burden on the teacher's throat.

[0025] The earphone device of the present invention adopts bone conduction earphones, which are worn on two ears in a fixed position, not only freeing up the two ears, but also completely freeing up the hands during lectures, making it convenient for teachers to operate with both hands (doing experiments, etc.).

[0026] Due to the breakthrough of low power consumption of our headphones, the battery life of the headphones is more than 12 hours, which effectively solves the problem of battery life of headphones. The audio-visual education device is directly connected to the power supply. In terms of volume control, the audio-visual education device and bone conduction headphones have 15 levels of volume adjustment, so that teachers with different voices can get the best effect of classroom amplification. In addition, the total weight of bone conduction headphones and connecting rod headsets is only about 30 grams, which is not much different from the weight of a pair of glasses, and is relatively comfortable to wear.

[0027] For example, in colleges, students have a large number of Bluetooth connected devices such as mobile terminals, and some students will also try to match the audio-visual education device with Bluetooth, which will disrupt the original matching order of the device. The present invention has the ability to lock the address, and the audio-visual education device, that is, the control device of the present invention, can only be matched with a dedicated bone conduction headset, and directional encryption is used. The role of directional encryption can ensure the security of communication and prevent malicious entry of other devices. To complete directional encryption, the audio-visual education device and the bone conduction headset need to be pre-installed with software during manufacturing.

[0028] The control device of the present invention can adjust the volume, and can be adjusted according to different usage occasions, so that teachers with different voices can get the best sound amplification effect in the classroom, and at the same time play a role of low power consumption. The headphone device has a battery life of more than twelve hours for teaching, which effectively solves the battery life problem of the headphone, and the control device can be directly connected to a power source. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional diagram of the control device of the present invention;

[0030] Figure 2 is a cross-sectional perspective view of a control device of the present invention;

[0031] Figure 3 It is a schematic diagram of the system structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the circuit distribution in the control device. Figure 1 ;

[0033] Figure 5 This is a schematic diagram of the circuit distribution in the control device. Figure 2 ;

[0034] Figure 6 is a circuit diagram of a first Bluetooth module of a control device;

[0035] Figure 7 Circuit diagram of the control device key module, the first power supply port and the voltage stabilizing module;

[0036] Figure 8 Control device display screen module circuit diagram;

[0037] Fig. 9 Circuit diagram of the first audio power amplifier module;

[0038] Fig.10 is a block diagram of the headphone device interface;

[0039] Reference numerals:

[0040] 1 housing; 101 mounting cavity; 102 mounting hole; 103 elastic clamping arm; 104 stopper; 105 circuit board; 106 mounting ear; 107 spacing;

[0041] 2 control device; 201 display screen; 202 key module;

[0042] 3 earphone device; 301 microphone module; 302 memory link. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the present invention, and thus to more clearly define the scope of the protection claimed in the present invention, the present invention is described in detail with respect to certain specific embodiments of the present invention. It should be noted that the following are only certain specific implementations of the present invention, which are only some embodiments of the present invention, wherein the specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and each specific feature does not naturally and directly limit the scope of implementation of the present invention.

[0044] Referring to the accompanying drawings, the present invention adopts the following technical solutions. On the one hand, the present invention provides a digital audio control system: comprising a plurality of control devices 2 and a plurality of earphone devices 3;

[0045] The control device 2 includes a first Bluetooth module and a button module, and the earphone device 3 includes a second Bluetooth module and a microphone module 301; the earphone device 3 communicates with the control device 2 through the first Bluetooth module and the second Bluetooth module; the button module controls the first Bluetooth module to send a corresponding communication signal to the matching earphone device 3.

[0046] The microphone module 301 is fixedly connected to the earphone device 3 via a memory link 302 , and the microphone module 301 is electrically connected to the earphone device 3 .

[0047] Through the above technical solution, the present invention can bend the memory link 302 to bring the microphone module 301 close to the user's mouth, and the distance can be adjusted as needed. Since the microphone head is very close to the mouth, the self-excitation phenomenon of the sound amplification device is better suppressed, and the occurrence of howling in the limited space of primary and secondary school classrooms is effectively prevented.

[0048] An audio device is also included. The control device 2 is electrically connected to the audio device. The control device 2 receives the sound collected by the microphone module 301 of the earphone device 3 and outputs it through the speaker of the audio device.

[0049] The control device 2 further comprises a first audio power amplifier module and a display screen 201 module. The control device 2 further comprises a first power supply port and a voltage stabilizing module.

[0050] The earphone device 3 further includes a second audio power amplifier module, a second power supply port, a charging protection module, and a microphone interface.

[0051] The control device 2 includes a housing 1, the housing 1 is provided with an installation cavity 101, the installation cavity 101 is provided with an installation hole 102, the installation hole 102 is smaller than the cross section of the installation cavity 101, and an elastic clamping arm 103 is fixed in the installation cavity 101 to cooperate with the installation hole 102. A limit block 104 is fixed in the housing 1, and a spacing 107 is provided between the limit block 104 and the elastic clamping arm 103. A circuit board 105 is fixed in the control housing 1, and the first Bluetooth module, the key module, the first audio power amplifier module, the first power supply port and the voltage stabilizing module are installed on the circuit board 105. The housing 1 is provided with a hollow for exposing the display screen 201 and the key module 202. The back of the circuit board 105 can form a limit block 104.

[0052] Through the above technical solution, the present invention is easy to install and fix. A plug-in can be installed on the wall, and the plug-in is inserted into the installation hole 102, and the elastic clamping arm 103 resists the plug-in to achieve stable insertion.

[0053] The button module 202 includes a number of subject buttons, a switch button, a collection button, a volume button, a matching button, and a disconnect button; the earphone device 3 can be matched with the control device 2 through the matching button when it is configured for the first time, and the disconnect button can be used to disconnect the communication when it needs to be disconnected. The earphone device 3 is a bone conduction earphone, and the button module 202 also includes a spare button.

[0054] A mounting ear 106 is also provided at the bottom of the housing 1 , and a through hole is formed in the mounting ear 106 .

[0055] The earphone device includes a processor with Bluetooth audio and programmable function, which is connected to a TYPE-C charging + microphone interface, a memory, a second audio amplifier module, two earphones, and is equipped with a charging protection chip.

[0056] A teaching audio control method comprises the following steps:

[0057] Each room is equipped with a control device 2 and an earphone device 3, and the control device 2 is electrically connected to the audio device;

[0058] Press the switch button of the button module 202 in the control device to turn on the control device 2;

[0059] When the control device 2 is turned on, press the matching button of the button module 202 so that the communication protocols between the first Bluetooth module of the control device 2 and the second Bluetooth module of the earphone device 3 in each room are matched with each other;

[0060] When the subject button of the button module 202 is pressed, the first Bluetooth module of the control device 2 in the room and the second Bluetooth module of the earphone device 3 are wirelessly connected to each other, and the first Bluetooth module of the control device 2 is shielded from the earphone devices in other rooms; and the code of the matched earphone device 3 is displayed in the control device 2. For example, if the earphone device numbered 1 is matched, the number 1 is displayed on the display screen 201.

[0061] When the microphone module 301 of the earphone device 3 receives audio, the earphone device 3 transmits the audio signal to the audio device through the first audio amplifier module of the control device 2 and plays the sound.

[0062] The above encryption method adopts the wireless communication protocol encoding method.

[0063] When put into use, for example, there are multiple multimedia classrooms, which can be numbered A, B, C, D, E..., each multimedia classroom is equipped with an audio device, numbered A1, B1, C1, D1, E1..., such as a computer with speakers, and the control device 2 of the present invention is installed on the wall or next to the podium through the mounting hole 102, and each classroom is equipped with a control device.

[0064] When matching:

[0065] One control unit can be paired with multiple headphone units, and one headphone unit can also be paired with multiple control units; pairing is required before use.

[0066] The pairing method is as follows: Step 1: First press the matching button on the control device, and the display screen of the control device will display "Matching";

[0067] Step 2: When the headset is turned off, the teacher presses the power button of the headset for more than 5 seconds, and a prompt tone "Bluetooth matching" will be heard from the headset;

[0068] Step 3: After the pairing is completed in about 3 seconds, you will hear the headset prompt tone "Connected" and a number will be displayed in the middle of the display (this number is also on the small label of the new headset, and the number for each headset is fixed).

[0069] The displayed number is the number of the panel button you press the next time the control device is connected to the headphone device (for example, if the number "1" is displayed, press the "Language 1" button on the panel). Pressing this number button on any matched control device will complete the connection. Other teachers who need to match the headphone device can complete it in this way (the displayed number is 2-8).

[0070] When you go to another classroom's control device to match, the matching method is the same, and the numbers displayed on the control device for the same headset are also the same.

[0071] How to connect the earphone device: After the matching is completed, when the teacher needs to use amplification equipment during class;

[0072] Step 1: After turning on the headset device, plug in the memory link headset, press the corresponding number button on the control device when pairing, and you will hear the prompt tone "Connected" on the headset device in about 3 seconds, and you can speak and amplify;

[0073] Step 2: After use, press the "Disconnect" button on the control device and the teacher will hear the headset prompt tone "Disconnected"; or after turning off the headset, "Disconnected" will be displayed on the display.

[0074] When teachers use this sound amplification equipment in class, the bone conduction headphones must be plugged into the memory rod headset, with the microphone module facing the mouth to optimize the sound amplification effect. The volume of the sound can only be adjusted by pressing the up and down volume buttons on the control device (the volume button of the headphone can no longer be adjusted after using the rod headset).

[0075] The control device of the present invention uses an external power supply and can be in the on state for a long time.

[0076] The first Bluetooth module may use a BTM525 chip, and the second Bluetooth module may use a QCC3034_VFBGA_90BALL.

[0077] The earphone device 3 can be connected to the teacher's mobile phone while being connected to the control device 2. The bone conduction earphone can also be connected to the teacher's mobile phone via Bluetooth while being connected to the control device to answer calls and listen to music. At this time, there is no need to connect the microphone module through the memory link.

[0078] It is worth mentioning that if the headset is connected to the teacher's own mobile phone at the same time, there will be a ringing tone or prompt tone on the headset when a call comes in. You can answer the call by pressing the call button on the headset. At this time, the connection between the headset device and the control device is cut off. If this function is not needed, just turn off the Bluetooth function of the mobile phone.

[0079] Compared with the prior art, the advantages of the present invention are: the present invention has a simple structure, teachers lecture for too long every day and speak at a high volume, both of which cause great damage to the throat. Many teachers also suffer from pharyngitis, and some even suffer from occupational diseases. The present invention can use the control device 2 and the headphone device 3 in conjunction with the existing audio equipment to amplify the teacher's voice with high fidelity to reduce the burden on the teacher's throat.

[0080] The earphone device 3 of the present invention adopts bone conduction earphones, which are worn on both ears in a fixed position, which not only frees both ears but also completely frees both hands during lectures, making it convenient for teachers to operate experiments with both hands.

[0081] Due to the breakthrough of low power consumption of our headphones, the battery life of the headphones is more than 12 hours, which effectively solves the problem of battery life of headphones. The audio-visual education device is directly connected to the power supply. In terms of volume control, the audio-visual education device and bone conduction headphones have 15 levels of volume adjustment, so that teachers with different voices can get the best effect of classroom amplification. In addition, the total weight of bone conduction headphones and connecting rod headsets is only about 30 grams, which is not much different from the weight of a pair of glasses, and is relatively comfortable to wear.

[0082] For example, in colleges, students have a large number of Bluetooth connected devices such as mobile terminals, and some students will also try to match the audio-visual education device with Bluetooth, which will disrupt the original matching order of the device. The present invention has the ability to lock the address, and the audio-visual education device, that is, the control device 2 of the present invention, can only be matched with a dedicated bone conduction headset, and directional encryption is used. The role of directional encryption can ensure the security of communication and prevent malicious entry of other devices. To complete directional encryption, the audio-visual education device and the bone conduction headset need to be pre-installed with software during manufacturing.

[0083] Bone conduction headphones can be selected from glasses-type bone conduction headphones. Although they have the disadvantages of shorter battery life and worse sound amplification effect, they are fashionable and beautiful.

[0084] The control device 2 of the present invention can adjust the volume, and can be adjusted according to different usage occasions, so that teachers with different voices can get the best sound amplification effect in the classroom, and at the same time play a role in low power consumption. The headphone device 3 has a battery life of more than twelve hours for teaching, which effectively solves the battery life problem of the headphone. The control device 2 can be directly connected to a power source.

[0085] In the above usage scenario, the room is a classroom, which can be used in various primary schools, junior high schools, high schools, universities, night schools and other occasions.

[0086] In addition, the present invention can also be used in other scenarios, for example, in scenarios where meetings are held, or in scenarios where schools hold open classes, or in scenarios such as language competitions, such as debates; in such scenarios, these conference rooms are equipped with control devices, and each person who needs to speak can wear a headphone device. The control device is connected to the audio equipment in the room, and can be controlled by the host of the meeting or the backstage control. The speaker can speak while sitting, standing, or walking, and it will not affect the sound amplification effect. The matching method of multiple headphone devices and the control device is consistent with the matching method in the classroom scenario.

[0087] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A digital audio control system: characterized in that: It comprises a plurality of control devices (2) and a plurality of earphone devices (3); The control device (2) comprises a first Bluetooth module and a key module, and the earphone device (3) comprises a second Bluetooth module and a microphone module (301); the earphone device (3) communicates with the control device (2) via the first Bluetooth module and the second Bluetooth module; the key module controls the first Bluetooth module to send a corresponding communication signal to the matching earphone device (3).

2. The digital audio control system according to claim 1, characterized in that: It also includes an audio device, the control device (2) is electrically connected to the audio device, and the control device (2) receives the sound collected by the microphone module (301) of the earphone device (3) and outputs it through the speaker of the audio device.

3. The digital audio control system according to claim 1, characterized in that: The control device (2) also includes a first audio power amplifier module and a display screen (201) module.

4. The digital audio control system according to claim 3, characterized in that: The control device (2) also includes a first power supply port and a voltage stabilization module.

5. The digital audio control system according to claim 1, characterized in that: The earphone device (3) also includes a second audio power amplifier module, a second power supply port and a charging protection module.

6. The digital audio control system according to claim 1, characterized in that: The control device (2) comprises a housing (1), the housing (1) is provided with a mounting cavity (101) inwardly, a mounting hole (102) is provided on the mounting cavity (101), the mounting hole (102) is smaller than the cross section of the mounting cavity (101), and an elastic clamping arm (103) cooperating with the mounting hole (102) is fixed in the mounting cavity (101). A limit block (104) is fixed in the housing (1), and a spacing (107) is provided between the limit block (104) and the elastic clamping arm (103).

7. The digital audio control system according to claim 6, characterized in that: A circuit board (105) is fixed inside the control housing (1); the first Bluetooth module, the key module, the first audio power amplifier module, the first power supply port and the voltage stabilizing module are mounted on the circuit board (105); and a hollow portion is provided on the housing (1) for exposing the display screen (201) and the key module (202).

8. The digital audio control system according to claim 1, characterized in that: The microphone module (301) is fixedly connected to the earphone device (3) via a memory connecting rod (302), and the microphone module (301) is electrically connected to the earphone device (3).

9. The digital audio control system according to claim 1, characterized in that: The button module (202) includes a plurality of subject buttons, a switch button, a collection button, a volume button, a matching button and a disconnect button; the earphone device (3) can be matched with the control device (2) through the matching button when it is configured for the first time, and the disconnect button can be used to disconnect the communication when disconnection is required.

10. A teaching audio control method, characterized in that: The following steps are involved: Each room is equipped with a control device (2) and an earphone device (3), and the control device (2) is electrically connected to the audio device; Pressing a switch button of a button module (202) in the control device to turn the control device (2) on; When the control device (2) is turned on, a matching button of the button module (202) is pressed, so that the communication protocols between the first Bluetooth module of the control device (2) and the second Bluetooth module of the headphone device (3) in each room are matched with each other; When the subject button of the button module (202) is pressed, the first Bluetooth module of the control device (2) in the room and the second Bluetooth module of the earphone device (3) are connected to each other by wireless communication, and the first Bluetooth module of the control device (2) is shielded from the earphone devices in other rooms; and the code of the matched earphone device (3) is displayed in the control device (2); When the microphone module (301) of the earphone device (3) receives audio, the earphone device (3) transmits the audio signal to the audio device through the first audio power amplifier module of the control device (2) and plays the sound.

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