A playback volume control method, device and storage medium

Abstract

The invention discloses a method, a device and a storage medium for controlling the volume of a playback. The method is applied to a conference microphone. The conference microphone has a built-in audio pickup module, an audio analog-to-digital conversion module, an infrared ranging module, an audio processing module and a mixing circuit. After the conference microphone is powered on, audio information is collected in real time by the audio pickup module, and the audio information is converted into an audio digital signal by the audio analog-to-digital conversion module, and distance information is obtained once every preset time by the infrared ranging module. The volume information of the audio digital signal is obtained by the audio processing module, and the volume of the audio digital signal is adjusted according to the distance information and the volume information, and the adjusted audio digital signal is processed by a mixing circuit to generate a mixed signal. The mixed signal is sent to a speaker through a power amplifier and an output port for playback. The sensitivity of the audio pickup module is adjusted according to the volume information to achieve a constant volume output by the microphone and improve the sound playback effect.

Description

Technical Field

[0001] The present invention relates to the technical field of broadcasting equipment, and in particular to a playback volume control method, device and storage medium. Background Art

[0002] The existing microphone can only adjust the volume according to the distance between the speaker and the microphone device. Since there are other factors that affect the volume besides the distance, the existing microphone cannot output a constant volume and the sound playback effect is poor. Summary of the invention

[0003] The present invention provides a playback volume control method, device and storage medium to achieve a constant volume output by a microphone and improve the sound playback effect.

[0004] The present invention provides a playback volume control method, which is applied to a conference microphone. The conference microphone has a built-in audio pickup module, an audio analog-to-digital conversion module, an infrared ranging module, an audio processing module and a mixing circuit. The conference microphone is connected to a speaker through a power amplifier and an output port.

[0005] The method comprises:

[0006] After the conference microphone is powered on, the audio information is collected in real time through the audio pickup module, and the audio information is converted into an audio digital signal through the audio analog-to-digital conversion module, and the distance information is obtained once every preset time through the infrared ranging module;

[0007] The audio processing module is used to obtain the volume information of the audio digital signal, and the volume of the audio digital signal is adjusted according to the distance information and the volume information, and the adjusted audio digital signal is processed by a mixing circuit to generate a mixed signal; the mixed signal is sent to a speaker through a power amplifier and an output port for playback;

[0008] The sensitivity of the audio pickup module is adjusted according to the volume information.

[0009] Furthermore, the conference microphone also includes: a distance data storage medium for storing distance information acquired by the infrared ranging module.

[0010] Furthermore, the distance information is obtained once every preset time by the infrared ranging module, specifically:

[0011] The infrared distance measuring module calculates the distance between the speaker and the microphone every preset time according to the transmitted infrared signal and the received infrared signal to generate distance information;

[0012] The infrared distance measurement module includes a transmitting driver, an infrared transmitter, a receiving processor, an infrared processor, a distance calculation unit, a main control chip and a UART interface;

[0013] The transmitting driver is used to drive the infrared transmitter to transmit a first infrared signal;

[0014] The receiving processor is used to receive and process the second infrared signal received by the infrared processor;

[0015] The distance calculation unit is used to calculate the distance between the speaker and the microphone according to the first infrared signal and the second infrared signal, and generate distance information;

[0016] Furthermore, it also includes:

[0017] The main control chip transmits the distance information to a data storage medium through the UART interface for storage.

[0018] Further, adjusting the volume of the audio digital signal according to the distance information and the volume information is specifically:

[0019] When the distance information is greater than the first distance, selecting a corresponding volume increase value according to the distance information and the volume information; and continuously increasing the volume value of the audio digital signal by the volume increase value until the first volume value is reached;

[0020] When the distance information is less than or equal to the first distance, a corresponding volume reduction value is selected according to the distance information and the volume information; and the volume value of the audio digital signal is continuously reduced by the volume reduction value until the first volume value is reached.

[0021] Further, the selecting a corresponding volume increase value according to the distance information and the volume information is specifically:

[0022] Every time the distance information increases by a first preset value compared to the first distance and the volume information is less than a second preset value, the initial volume increase value is increased by a third preset value as the corresponding volume increase value; the initial volume increase value is preset.

[0023] Further, the selecting a corresponding volume reduction value according to the distance information and the volume information is specifically:

[0024] Each time the distance information decreases by a first preset value compared to the first distance and the volume information is greater than a fourth preset value, the initial volume reduction value is increased by a third preset value as the corresponding volume reduction value, and the initial volume reduction value is preset.

[0025] Further, adjusting the sensitivity of the audio pickup module according to the volume information is specifically:

[0026] When the volume information is greater than the first volume value, the current sensitivity of the audio pickup module is reduced; wherein, when the volume information increases by a fifth preset value compared to the first volume value, the current sensitivity of the audio pickup module is reduced by a preset unit sensitivity once;

[0027] When the volume information is less than the first volume value, the current sensitivity of the audio pickup module is increased; wherein, when the volume information decreases by a fifth preset value compared to the first volume value, the current sensitivity of the audio pickup module is increased by a preset unit sensitivity once;

[0028] When the volume information is equal to the first volume value, the current sensitivity of the audio pickup module is maintained.

[0029] As a preferred solution, the present invention integrates an infrared ranging device into an existing microphone, so that when the speaker is speaking at a long distance from the microphone, the microphone can also automatically adjust the gain and sound pickup sensitivity, so that the sound pressure remains unchanged and a constant volume effect is achieved.

[0030] Correspondingly, the present invention also provides a playback volume control device, which is applied to a conference microphone, wherein the conference microphone has a built-in audio pickup module, an audio analog-to-digital conversion module, an infrared ranging module, an audio processing module and a mixing circuit, and the conference microphone is connected to a speaker through a power amplifier and an output port;

[0031] The device comprises: a distance detection module, a volume detection module, a play adjustment module and a sensitivity adjustment module;

[0032] The distance detection module is used to collect audio information in real time through the audio pickup module after the conference microphone is powered on, and convert the audio information into an audio digital signal through the audio analog-to-digital conversion module, and obtain distance information once every preset time through the infrared distance measurement module;

[0033] The volume detection module is used to obtain the volume information of the audio digital signal using the audio processing module;

[0034] The playback adjustment module is used to adjust the volume of the audio digital signal according to the distance information using the audio processing module, process the adjusted audio digital signal through a mixing circuit to generate a mixed signal; and send the mixed signal to a speaker through a power amplifier and an output port for playback;

[0035] The sensitivity adjustment module is used to adjust the sensitivity of the audio pickup module according to the volume information.

[0036] Correspondingly, the present invention also provides a computer-readable storage medium, which includes a stored computer program; wherein, when the computer program is running, it controls the device where the computer-readable storage medium is located to execute a playback volume control method as described in the content of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a flow chart of an embodiment of a playback volume control method provided by the present invention;

[0038] Figure 2 It is a structural schematic diagram of an embodiment of a playback volume control device provided by the present invention. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Embodiment 1

[0041] Please refer to Figure 1 , a playback volume control method provided by an embodiment of the present invention is applied to a conference microphone, wherein the conference microphone has a built-in audio pickup module, an audio analog-to-digital conversion module, an infrared ranging module, an audio processing module and a mixing circuit, and the conference microphone is connected to a speaker through a power amplifier and an output port;

[0042] The method comprises steps S101-S103:

[0043] Step S101: After the conference microphone is powered on, the audio information is collected in real time through the audio pickup module, and the audio information is converted into an audio digital signal through the audio analog-to-digital conversion module, and the distance information is obtained once every preset time through the infrared distance measurement module;

[0044] Furthermore, the conference microphone also includes: a distance data storage medium for storing distance information acquired by the infrared ranging module.

[0045] Furthermore, the distance information is obtained once every preset time by the infrared ranging module, specifically:

[0046] The infrared distance measuring module calculates the distance between the speaker and the microphone every preset time according to the transmitted infrared signal and the received infrared signal to generate distance information;

[0047] The infrared distance measurement module includes a transmitting driver, an infrared transmitter, a receiving processor, an infrared processor, a distance calculation unit, a main control chip and a UART interface;

[0048] The transmitting driver is used to drive the infrared transmitter to transmit a first infrared signal;

[0049] The receiving processor is used to receive and process the second infrared signal received by the infrared processor;

[0050] The distance calculation unit is used to calculate the distance between the speaker and the microphone according to the first infrared signal and the second infrared signal to generate distance information;

[0051] In this embodiment, the infrared distance measurement inside the microphone is used to calculate the distance between the speaker and the microphone and the volume. As one of the preferred implementation schemes, the phase distance measurement method is used. The specific process is as follows:

[0052] Assume the modulated light wave frequency is f, the time t used at the distance to be measured is D, its phase shift is Φ, c is the speed of light, and the expression of D is:

[0053] D = c*t / 2;

[0054] The intensity of the modulated light emitted by the infrared transmitter at the starting time t1 is:

[0055] I1=Asin(ωt1+Φ0);

[0056] The modulated light intensity received by the infrared processor at the receiving moment is:

[0057] I2=Asin(ωt1+ωt+Φ0);

[0058] The phase difference between the receiving time and the transmitting time is:

[0059] Φ=(ωt1+ωt+Φ0)-(ωt1+Φ0)=ωt=2πft;

[0060] t = Φ / (2πf);

[0061] It can be obtained: D=ct / 2=(c / 2)*(Φ / (2πf)=cΦ / (4πf);

[0062] Can be rewritten as:

[0063] Furthermore, it also includes:

[0064] The main control chip transmits the distance information to a data storage medium through the UART interface for storage.

[0065] Step S102: using the audio processing module to obtain the volume information of the audio digital signal, and adjusting the volume of the audio digital signal according to the distance information and the volume information, processing the adjusted audio digital signal through a mixing circuit to generate a mixed signal; sending the mixed signal to a speaker through a power amplifier and an output port for playback;

[0066] Further, adjusting the volume of the audio digital signal according to the distance information and the volume information is specifically:

[0067] When the distance information is greater than the first distance, selecting a corresponding volume increase value according to the distance information and the volume information; and continuously increasing the volume value of the audio digital signal by the volume increase value until the first volume value is reached;

[0068] When the distance information is less than or equal to the first distance, a corresponding volume reduction value is selected according to the distance information and the volume information; and the volume value of the audio digital signal is continuously reduced by the volume reduction value until the first volume value is reached.

[0069] Further, the selecting a corresponding volume increase value according to the distance information and the volume information is specifically:

[0070] Every time the distance information increases by a first preset value compared to the first distance and the volume information is less than a second preset value, the initial volume increase value is increased by a third preset value as the corresponding volume increase value; the initial volume increase value is preset.

[0071] Further, the selecting a corresponding volume reduction value according to the distance information and the volume information is specifically:

[0072] Each time the distance information decreases by a first preset value compared to the first distance and the volume information is greater than a fourth preset value, the initial volume reduction value is increased by a third preset value as the corresponding volume reduction value, and the initial volume reduction value is preset.

[0073] In this embodiment, the standard distance is the optimal speaking distance of the current microphone, which depends on the actual microphone model. In this embodiment, the optimal speaking distance is 20 cm, and the optimal volume, that is, the first volume value is 70db.

[0074] For every 3cm increase in the current distance compared to 20cm, and the volume decreases below a second preset value, the volume is increased by 1db based on the initial volume increase value.

[0075] For every 3 cm reduction in the current distance compared to 20 cm and an increase in the volume to above a fourth preset value, the volume is reduced by 1 db based on the initial volume reduction value.

[0076] Exemplarily, the initial volume increase value and the initial volume decrease value are both 1db, the current distance is 23 cm, and the volume decreases to below the second preset value, then 1db is increased once on the basis of 1db, that is, 2db, and the volume value of the audio digital signal is continuously increased by 2db until it reaches 70db;

[0077] If the current distance is 26 cm and the volume decreases below the second preset value, 1db is increased twice on the basis of 1db, that is, 3db, and the volume value of the audio digital signal is continuously increased by 3db until it reaches 70db.

[0078] Similarly, the situation where the distance is less than 20 cm is similar.

[0079] Step S103: adjusting the sensitivity of the audio pickup module according to the volume information.

[0080] Further, adjusting the sensitivity of the audio pickup module according to the volume information is specifically:

[0081] When the volume information is greater than the first volume value, the current sensitivity of the audio pickup module is reduced; wherein, when the volume information increases by a fifth preset value compared to the first volume value, the current sensitivity of the audio pickup module is reduced by a preset unit sensitivity once;

[0082] When the volume information is less than the first volume value, the current sensitivity of the audio pickup module is increased; wherein, when the volume information decreases by a fifth preset value compared to the first volume value, the current sensitivity of the audio pickup module is increased by a preset unit sensitivity once;

[0083] When the volume information is equal to the first volume value, the current sensitivity of the audio pickup module is maintained.

[0084] In this embodiment, compared with the optimal volume of 70db, when the volume increases by 5db, the sensitivity of the audio pickup module is reduced by one unit sensitivity once, and when the volume decreases by 5db, the sensitivity of the audio pickup module is increased by one unit sensitivity once. For example, if the current volume is 75db, the sensitivity of the audio pickup module is reduced by one unit; if the current volume is 80db, the sensitivity of the audio pickup module is reduced by two units, and so on.

[0085] Implementing the embodiments of the present invention has the following effects:

[0086] The present invention integrates an infrared distance measuring device into an existing microphone, so that when a speaker is giving a speech at a long distance from the microphone, the microphone can also automatically adjust the gain and sound pickup sensitivity, so that the sound pressure remains unchanged and a constant volume effect is achieved.

[0087] Embodiment 2

[0088] Please refer to Figure 2 , a playback volume control device provided by an embodiment of the present invention is applied to a conference microphone, wherein the conference microphone has a built-in audio pickup module, an audio analog-to-digital conversion module, an infrared ranging module, an audio processing module and a mixing circuit, and the conference microphone is connected to a speaker through a power amplifier and an output port;

[0089] The device comprises: a distance detection module 301, a volume detection module 302, a play adjustment module 303 and a sensitivity adjustment module 304;

[0090] The distance detection module is used to collect audio information in real time through the audio pickup module after the conference microphone is powered on, and convert the audio information into an audio digital signal through the audio analog-to-digital conversion module, and obtain distance information once every preset time through the infrared distance measurement module;

[0091] The volume detection module is used to obtain the volume information of the audio digital signal using the audio processing module;

[0092] The playback adjustment module is used to adjust the volume of the audio digital signal according to the distance information using the audio processing module, process the adjusted audio digital signal through a mixing circuit to generate a mixed signal; and send the mixed signal to a speaker through a power amplifier and an output port for playback;

[0093] The sensitivity adjustment module is used to adjust the sensitivity of the audio pickup module according to the volume information.

[0094] Furthermore, the conference microphone also includes: a distance data storage medium for storing distance information acquired by the infrared ranging module.

[0095] Furthermore, the distance information is obtained once every preset time by the infrared ranging module, specifically:

[0096] The infrared distance measuring module calculates the distance between the speaker and the microphone every preset time according to the transmitted infrared signal and the received infrared signal to generate distance information;

[0097] The infrared distance measurement module includes a transmitting driver, an infrared transmitter, a receiving processor, an infrared processor, a distance calculation unit, a main control chip and a UART interface;

[0098] The transmitting driver is used to drive the infrared transmitter to transmit a first infrared signal;

[0099] The receiving processor is used to receive and process the second infrared signal received by the infrared processor;

[0100] The distance calculation unit is used to calculate the distance between the speaker and the microphone according to the first infrared signal and the second infrared signal, and generate distance information;

[0101] Furthermore, it also includes:

[0102] The main control chip transmits the distance information to a data storage medium through the UART interface for storage.

[0103] Further, adjusting the volume of the audio digital signal according to the distance information and the volume information is specifically:

[0104] When the distance information is greater than the first distance, selecting a corresponding volume increase value according to the distance information and the volume information; and continuously increasing the volume value of the audio digital signal by the volume increase value until the first volume value is reached;

[0105] When the distance information is less than or equal to the first distance, a corresponding volume reduction value is selected according to the distance information and the volume information; and the volume value of the audio digital signal is continuously reduced by the volume reduction value until the first volume value is reached.

[0106] Further, the selecting a corresponding volume increase value according to the distance information and the volume information is specifically:

[0107] Every time the distance information increases by a first preset value compared to the first distance and the volume information is less than a second preset value, the initial volume increase value is increased by a third preset value as the corresponding volume increase value; the initial volume increase value is preset.

[0108] Further, the selecting a corresponding volume reduction value according to the distance information and the volume information is specifically:

[0109] Each time the distance information decreases by a first preset value compared to the first distance and the volume information is greater than a fourth preset value, the initial volume reduction value is increased by a third preset value as the corresponding volume reduction value, and the initial volume reduction value is preset.

[0110] Further, adjusting the sensitivity of the audio pickup module according to the volume information is specifically:

[0111] When the volume information is greater than the first volume value, the current sensitivity of the audio pickup module is reduced; wherein, when the volume information increases by a fifth preset value compared to the first volume value, the current sensitivity of the audio pickup module is reduced by a preset unit sensitivity once;

[0112] When the volume information is less than the first volume value, the current sensitivity of the audio pickup module is increased; wherein, when the volume information decreases by a fifth preset value compared to the first volume value, the current sensitivity of the audio pickup module is increased by a preset unit sensitivity once;

[0113] When the volume information is equal to the first volume value, the current sensitivity of the audio pickup module is maintained.

[0114] The above-mentioned playback volume control device can implement the playback volume control method of the above-mentioned method embodiment. The options in the above-mentioned method embodiment are also applicable to this embodiment and will not be described in detail here. The rest of the contents of the embodiment of this application can refer to the contents of the above-mentioned method embodiment, and will not be repeated in this embodiment.

[0115] Embodiment 3

[0116] Correspondingly, the present invention also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the playback volume control method described in any one of the above embodiments.

[0117] Exemplarily, the computer program may be divided into one or more modules / units, which are stored in the memory and executed by the processor to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, which are used to describe the execution process of the computer program in the terminal device.

[0118] The terminal device may be a computing device such as a desktop computer, a notebook, a palmtop computer, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0119] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the terminal device, and uses various interfaces and lines to connect various parts of the entire terminal device.

[0120] The memory can be used to store the computer program and / or module, and the processor realizes various functions of the terminal device by running or executing the computer program and / or module stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required for a function, etc.; the data storage area can store data created according to the use of the mobile terminal, etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0121] Wherein, if the module / unit integrated in the terminal device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0122] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for controlling playback volume, characterized in that: Applied to conference microphones, the conference microphones have built-in audio pickup modules, audio analog-to-digital conversion modules, infrared ranging modules, audio processing modules and mixing circuits, and the conference microphones are connected to the speakers through power amplifiers and output ports; The method comprises: After the conference microphone is powered on, the audio information is collected in real time through the audio pickup module, and the audio information is converted into an audio digital signal through the audio analog-to-digital conversion module, and the distance information is obtained once every preset time through the infrared ranging module; The audio processing module is used to obtain the volume information of the audio digital signal, and the volume of the audio digital signal is adjusted according to the distance information and the volume information, and the adjusted audio digital signal is processed by a mixing circuit to generate a mixed signal; the mixed signal is sent to a speaker through a power amplifier and an output port for playback; The sensitivity of the audio pickup module is adjusted according to the volume information, specifically: When the volume information is greater than the first volume value, the current sensitivity of the audio pickup module is reduced; wherein, when the volume information increases by a fifth preset value compared to the first volume value, the current sensitivity of the audio pickup module is reduced by a preset unit sensitivity once; When the volume information is less than the first volume value, the current sensitivity of the audio pickup module is increased; wherein, when the volume information decreases by a fifth preset value compared to the first volume value, the current sensitivity of the audio pickup module is increased by a preset unit sensitivity once; When the volume information is equal to the first volume value, the current sensitivity of the audio pickup module is maintained.

2. A playback volume control method as claimed in claim 1, characterized in that: The conference microphone further comprises: a distance data storage medium for storing distance information acquired by the infrared distance measuring module.

3. A playback volume control method as claimed in claim 1, characterized in that: The distance information is obtained once every preset time by the infrared distance measurement module, specifically: The infrared distance measuring module calculates the distance between the speaker and the microphone every preset time according to the transmitted infrared signal and the received infrared signal to generate distance information; The infrared distance measurement module includes a transmitting driver, an infrared transmitter, a receiving processor, an infrared processor, a distance calculation unit, a main control chip and a UART interface; The transmitting driver is used to drive the infrared transmitter to transmit a first infrared signal; The receiving processor is used to receive and process the second infrared signal received by the infrared processor; The distance calculation unit is used to calculate the distance between the speaker and the microphone according to the first infrared signal and the second infrared signal, and generate distance information.

4. A playback volume control method as claimed in claim 3, characterized in that: Also includes: The main control chip transmits the distance information to a data storage medium through the UART interface for storage.

5. A playback volume control method as claimed in claim 1, characterized in that: The step of adjusting the volume of the audio digital signal according to the distance information and the volume information is specifically as follows: When the distance information is greater than the first distance, selecting a corresponding volume increase value according to the distance information and the volume information; and continuously increasing the volume value of the audio digital signal by the volume increase value until the first volume value is reached; When the distance information is less than or equal to the first distance, a corresponding volume reduction value is selected according to the distance information and the volume information; and the volume value of the audio digital signal is continuously reduced by the volume reduction value until the first volume value is reached.

6. A playback volume control method as claimed in claim 5, characterized in that: The selecting a corresponding volume increase value according to the distance information and the volume information is specifically: Every time the distance information increases by a first preset value compared to the first distance and the volume information is less than a second preset value, the initial volume increase value is increased by a third preset value as the corresponding volume increase value; the initial volume increase value is preset.

7. A playback volume control method as claimed in claim 5, characterized in that: The selecting a corresponding volume reduction value according to the distance information and the volume information is specifically: Each time the distance information decreases by a first preset value compared to the first distance and the volume information is greater than a fourth preset value, the initial volume reduction value is increased by a third preset value as the corresponding volume reduction value, and the initial volume reduction value is preset.

8. A playback volume control device, characterized in that: Applied to conference microphones, the conference microphones have built-in audio pickup modules, audio analog-to-digital conversion modules, infrared ranging modules, audio processing modules and mixing circuits, and the conference microphones are connected to the speakers through power amplifiers and output ports; The device comprises: a distance detection module, a volume detection module, a play adjustment module and a sensitivity adjustment module; The distance detection module is used to collect audio information in real time through the audio pickup module after the conference microphone is powered on, and convert the audio information into an audio digital signal through the audio analog-to-digital conversion module, and obtain distance information once every preset time through the infrared distance measurement module; The volume detection module is used to obtain the volume information of the audio digital signal using the audio processing module; The playback adjustment module is used to adjust the volume of the audio digital signal according to the distance information using the audio processing module, process the adjusted audio digital signal through a mixing circuit to generate a mixed signal; and send the mixed signal to a speaker through a power amplifier and an output port for playback; The sensitivity adjustment module is used to adjust the sensitivity of the audio pickup module according to the volume information, specifically: When the volume information is greater than the first volume value, the current sensitivity of the audio pickup module is reduced; wherein, when the volume information increases by a fifth preset value compared to the first volume value, the current sensitivity of the audio pickup module is reduced by a preset unit sensitivity once; When the volume information is less than the first volume value, the current sensitivity of the audio pickup module is increased; wherein, when the volume information decreases by a fifth preset value compared to the first volume value, the current sensitivity of the audio pickup module is increased by a preset unit sensitivity once; When the volume information is equal to the first volume value, the current sensitivity of the audio pickup module is maintained.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program; wherein, when the computer program is run, it controls the device where the computer-readable storage medium is located to execute a playback volume control method as claimed in any one of claims 1 to 7.

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