A recording circuit control board and a recording device

Abstract

The application provides a recording circuit control board and a recording device, wherein the recording circuit control board comprises a printed circuit board body, a main control chip, a storage chip, a power management unit and a microphone array arranged on the printed circuit board body, the power management unit, the main control chip and the storage chip are arranged along the long side direction of the printed circuit board body; the microphone array is arranged on the side of the printed circuit board body provided with the main control chip and is distributed on the two side long sides of the printed circuit board body; wherein only one microphone is arranged on the first side long side of the microphone array, a plurality of microphones are arranged on the second side long side, and the center line of the center of the microphone on the first side long side and the center of the microphone at the two ends on the second side long side forms an isosceles triangle. According to the arrangement mode of the microphone array and the audio algorithm in the main control chip, the environmental noise in the sound information can be reduced, and the classification pickup of the sound is beneficial.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit control board, in particular to a recording circuit control board and a recording device. BACKGROUND

[0002] With the development of modern science and technology, digital products have evolved from the initial bulky large computers to small devices that can be worn on the body. Among them, wearable recording devices have emerged as the times require. They can accompany users in their daily activities and are widely used.

[0003] Traditional recording devices receive sound information from the external environment and identify and record the sound information from the external environment. However, with the rapid development of electronic information technology, traditional recording devices have been difficult to adapt to today's booming intelligent development. The existing recording devices are based on traditional analog sound collection and perform remote and dispersed sound processing. In this way, there is too much environmental noise in the sound information, which is not conducive to the classification and picking up of sound. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a recording circuit control board and a recording device. By arranging the positions of the microphone array, the environmental noise in the sound information is reduced, which is conducive to the classification and picking up of sound.

[0005] In a first aspect, the present application provides a recording circuit control board, comprising a printed circuit board body, and a main control chip, a storage chip, a power management unit and a microphone array arranged on the printed circuit board body. The power management unit, the main control chip and the storage chip are arranged along the long side direction of the printed circuit board body.

[0006] The microphone array is arranged on one side of the printed circuit board body provided with the main control chip, and is distributed on the two side long edges of the printed circuit board body.

[0007] Among them, there is only one microphone on the first side long edge of the microphone array, and a plurality of microphones are arranged on the second side long edge. The center of the microphone on the first side long edge and the center of the microphones at both ends on the second side long edge form an isosceles triangle.

[0008] Preferably, the microphone array comprises a first omnidirectional microphone, a second omnidirectional microphone, a third omnidirectional microphone and a fourth omnidirectional microphone.

[0009] The first omnidirectional microphone is arranged centrally on the first side long edge of the printed circuit board body. The second omnidirectional microphone, the third omnidirectional microphone and the fourth omnidirectional microphone are arranged in sequence on the second side long edge of the printed circuit board body, and the centers of the second omnidirectional microphone, the third omnidirectional microphone and the fourth omnidirectional microphone are collinear.

[0010] The line connecting the center of the first omnidirectional microphone and the center of the third omnidirectional microphone is perpendicular to the line connecting the center of the second omnidirectional microphone and the center of the fourth omnidirectional microphone.

[0011] Preferably, the center distance between the first omnidirectional microphone and the third omnidirectional microphone, the center distance between the second omnidirectional microphone and the third omnidirectional microphone, and the center distance between the third omnidirectional microphone and the fourth omnidirectional microphone are all between 20mm and 40mm.

[0012] Preferably, the recording circuit control board further comprises a combined microphone array, which is on the same side of the printed circuit board body as the microphone array.

[0013] The combined microphone array comprises a fifth omnidirectional microphone, a sixth omnidirectional microphone, and a directional microphone, the fifth omnidirectional microphone and the sixth omnidirectional microphone are arranged on the second long side of the printed circuit board body, wherein the fifth omnidirectional microphone is adjacent to the third omnidirectional microphone, and the sixth omnidirectional microphone is adjacent to the fourth omnidirectional microphone.

[0014] The directional microphone is arranged on the first long side of the printed circuit board body and at the corner of the printed circuit board body close to the power management unit.

[0015] Preferably, the center distance between the fifth omnidirectional microphone and the sixth omnidirectional microphone is between 20mm and 40mm.

[0016] Preferably, the center line of the directional microphone is perpendicular to the printed circuit board body.

[0017] Preferably, a DIP switch is arranged on the second long side and close to the power management unit.

[0018] When the DIP switch is in the first position, the recording circuit control board works with the microphone array; when the DIP switch is in the second position, the recording circuit control board works with the combined microphone array.

[0019] In a second aspect, the embodiments of the present application further provide a recording circuit control board, comprising a printed circuit board body, and a master control chip, a storage chip, a power management unit, and a microphone array arranged on the printed circuit board body, the power management unit, the master control chip, and the storage chip are arranged along the long side direction of the printed circuit board body.

[0020] The microphone array is arranged on the side of the printed circuit board body where the master control chip is arranged, and is distributed on the two long sides of the printed circuit board body.

[0021] The microphone array is arranged on the first side long edge with one microphone, and arranged on the second side long edge with at least two microphones.

[0022] Preferably, the microphone array comprises a seventh omnidirectional microphone, an eighth omnidirectional microphone and a directional microphone, the seventh omnidirectional microphone and the eighth omnidirectional microphone are arranged on the second side long edge of the printed circuit board body, wherein the seventh omnidirectional microphone is close to the power management unit, and the eighth omnidirectional microphone is close to the storage chip; the center distance between the seventh omnidirectional microphone and the eighth omnidirectional microphone is between 20mm and 40mm.

[0023] The directional microphone is arranged on the first side long edge of the printed circuit board body and at the corner of the printed circuit board body close to the power management unit.

[0024] In a third aspect, the embodiments of the present application provide a recording device comprising the recording circuit control board of the first aspect and the second aspect.

[0025] The embodiments of the present application provide a recording circuit control board and a recording device, wherein the recording circuit control board comprises a printed circuit board body, a master control chip, a storage chip, a power management unit and a microphone array arranged on the printed circuit board body, the power management unit, the master control chip and the storage chip are arranged along the long edge direction of the printed circuit board body; the microphone array is arranged on the side of the printed circuit board body where the master control chip is arranged and distributed on the two side long edges of the printed circuit board body; wherein there is only one microphone on the first side long edge of the microphone array, and there are a plurality of microphones on the second side long edge; the center line of the microphone on the first side long edge and the center line of the microphone at the two ends on the second side long edge form an isosceles triangle.

[0026] In the scheme, according to the arrangement of the microphone array, the microphone on the first side long edge and the microphone on the second side long edge pick up sound at the same time, and the picked-up sound is processed by the audio algorithm in the master control chip, so that the microphone on the first side long edge is mainly used for picking up sound, and the microphone on the second side long edge is mainly used for shielding noise, eliminating noise in the surrounding environment, and finally obtaining two clear audio track files saved in the storage chip. Further, the arrangement of the microphone array provided by the present application can reduce the environmental noise in the sound information, which is conducive to the classification of sound pickup.

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the present specification only show some of the embodiments of the present application, and should not be considered as limiting the scope of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0029] Figure 1 The structural schematic diagram of the first recording circuit control board provided by the embodiments of the present application is shown in the figure.

[0030] Figure 2 The structural connection schematic diagram of the first recording circuit control board provided by the embodiments of the present application is shown in the figure.

[0031] Figure 3 The structural schematic diagram of the second recording circuit control board provided by the embodiments of the present application is shown in the figure.

[0032] Figure 4 The structural connection schematic diagram of the second recording circuit control board provided by the embodiments of the present application is shown in the figure.

[0033] Figure 5 The structural schematic diagram of the third recording circuit control board provided by the embodiments of the present application is shown in the figure.

[0034] The figure shows the following: 1-printed circuit board body; 2-main control chip; 3-storage chip; 4-power management unit; 51-first omnidirectional microphone; 52-second omnidirectional microphone; 53-third omnidirectional microphone; 54-fourth omnidirectional microphone; 61-fifth omnidirectional microphone; 62-sixth omnidirectional microphone; 63, 83-directional microphone; 7-dial switch; 81-seventh omnidirectional microphone; 82-eighth omnidirectional microphone. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0036] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0038] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connect" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In order to enable those skilled in the art to use the content of the present application, the following embodiments are given in combination with a specific application scenario "badge type recording device". For those skilled in the art, the recording circuit control board defined herein can be applied to other embodiments and other application scenarios, such as a recording pen, a telephone recording box, etc., without departing from the scope of the present application. Although the present application mainly describes the application of the recording circuit control board to the scenario of the badge type recording device, it should be understood that this is only an exemplary embodiment.

[0040] Please refer to Figure 1 , Figure 1 The first recording circuit control board provided by the embodiment of the present application is shown in the structural schematic diagram of Figure 1As shown in the embodiment, the recording circuit control board comprises a printed circuit board body 1, a main control chip 2, a storage chip 3, a power management unit 4 and a microphone array arranged on the printed circuit board body 1, the power management unit 4, the main control chip 2 and the storage chip 3 are arranged along the long side direction of the printed circuit board body 1; the power management unit 4 is used for power supply, the main control chip 2 internally stores a DSP audio algorithm, which is used for operation and processing of the picked-up sound, and the storage chip 3 is used for storing the audio track file processed by the main control chip 2.

[0041] The microphone array is arranged on one side of the printed circuit board body 1 provided with the main control chip 2 and is distributed on the two side long sides of the printed circuit board body 1; wherein only one microphone is arranged on the first side long side of the microphone array, and a plurality of microphones are arranged on the second side long side, and the center line of the center of the microphone on the first side long side and the center of the microphone at the two ends on the second side long side forms an isosceles triangle.

[0042] Specifically, according to the arrangement mode of the microphone array and in combination with the audio algorithm in the main control chip 2, the microphone on the first side long side and the microphone on the second side long side simultaneously pick up sound, the picked-up sound is processed by the audio algorithm in the main control chip 2, so that the microphone on the first side long side is mainly used for picking up sound, the microphone on the second side long side is mainly used for shielding noise, and the noise in the surrounding environment is eliminated, and finally two clear audio track files are obtained and saved in the storage chip 3.

[0043] Optionally, the process of processing the sound signal by the main control chip 2 can comprise: respectively performing sound algorithm operation, data scheduling transmission, peripheral device cooperative logic control and interactive management of system application on the digital audio signal. Optionally, before processing the above-mentioned digital audio signal, the main control chip 2 can first perform noise reduction processing on the received digital audio signal based on a noise reduction algorithm.

[0044] In this scheme, when the user needs to record the conversation between himself and others, the chest card type recording device can be used for recording, the microphone array on the recording circuit control board picks up the sound information of the outside world, and then the DSP algorithm on the main control chip 2 is used for data processing, so that the picked-up sound information is divided into two audio track files and saved in the storage chip 3, and finally the device can transmit the audio track file saved in the storage chip 3 to the collection station through the USB interface or Bluetooth for data storage and uploading.

[0045] Preferably, the microphone array comprises a first omnidirectional microphone 51, a second omnidirectional microphone 52, a third omnidirectional microphone 53 and a fourth omnidirectional microphone 54.

[0046] The first omnidirectional microphone 51 is centrally arranged on the first side long edge of the printed circuit board body 1, the second omnidirectional microphone 52, the third omnidirectional microphone 53 and the fourth omnidirectional microphone 54 are sequentially arranged on the second side long edge of the printed circuit board body 1, and the center of the second omnidirectional microphone 52, the center of the third omnidirectional microphone 53 and the center of the fourth omnidirectional microphone 54 are collinear;

[0047] The line connecting the center of the first omnidirectional microphone 51 and the center of the third omnidirectional microphone 53 is perpendicular to the line connecting the center of the second omnidirectional microphone 52 and the center of the fourth omnidirectional microphone 54.

[0048] Preferably, the center distance between the first omnidirectional microphone 51 and the third omnidirectional microphone 53, the center distance between the second omnidirectional microphone 52 and the third omnidirectional microphone 53, and the center distance between the third omnidirectional microphone 53 and the fourth omnidirectional microphone 54 are all between 20mm and 40mm.

[0049] In this scheme, the optimal center distance between the first omnidirectional microphone 51 and the third omnidirectional microphone 53, the optimal center distance between the second omnidirectional microphone 52 and the third omnidirectional microphone 53, and the optimal center distance between the third omnidirectional microphone 53 and the fourth omnidirectional microphone 54 are all 20mm. According to the position of the omnidirectional microphone and the center distance between the adjacent two omnidirectional microphones, the algorithm running in the main control chip 2 is designed and stored in the main control chip 2, and then the sound picked up by each omnidirectional microphone is transmitted to the main control chip 2 for operation and processing, so that a sound file with better fidelity can be obtained.

[0050] Please refer to Figure 2 , Figure 2 The first recording circuit control board structure connection schematic diagram provided by the embodiment of the application; as shown in Figure 2 The four omnidirectional microphones simultaneously pick up the surrounding sound, and then transmit the sound to the main control chip 2, and the picked-up sound is operated and processed by the DSP audio algorithm in the main control chip 2. The processed sound is divided into two sound tracks, including a first separated sound track and a second separated sound track. The first separated sound track is the sound file of the user, and the second separated sound track is the sound file of the surrounding people. The sound files of the first separated sound track and the second separated sound track are saved in the storage chip 3 respectively.

[0051] Specifically, the omnidirectional microphone of the present application can be a silicon microphone, which can also be referred to as a micro-electromechanical system microphone (MEMS microphone) or a microphone chip. The silicon microphone has the advantages of high sensitivity, consistent phase, good stability, small size, etc. The sound data collected by the silicon microphone is conducive to the accurate positioning of the sound source by the main control chip 2 and the calculation of narrow beams based on the principle of beamforming, so as to achieve the function of noise reduction. In addition, the sampling rate of the silicon microphone is usually greater than or equal to 16k / 24bit. By using this sampling rate and combining with the algorithms of accurate sound source positioning, narrow beam noise reduction, and echo cancellation, the quality of the recording data output by the main control chip 2 is higher, and the accuracy is higher when the recording data is used for subsequent sound recognition and text transcription. In addition, the sound collecting distance of the silicon microphone can usually reach 5-8 meters, so that the chest card type recording device can more accurately collect sound data at close range.

[0052] In summary, according to the arrangement of the microphone array and in combination with the audio algorithms in the main control chip 2, the microphones on the first long side and the microphones on the second long side simultaneously pick up sound. The audio algorithms in the main control chip 2 process the picked-up sound, so that the microphones on the first long side are mainly used for picking up sound, and the microphones on the second long side are mainly used for shielding noise and eliminating noise in the surrounding environment. Finally, two clear audio track files are obtained and saved in the storage chip 3. Furthermore, the arrangement of the microphone array provided by the present application can reduce environmental noise in the sound information, which is conducive to the classification of sound pickup.

[0053] Please refer to Figure 3 , Figure 3 The second recording circuit control board structure provided by the embodiment of the present application is shown in FIG. 4. As shown in FIG. 4, the recording circuit control board further comprises a combined microphone array, and the combined microphone array and the microphone array are on the same face of the printed circuit board body 1. Figure 3

[0054] The combined microphone array comprises a fifth omnidirectional microphone 61, a sixth omnidirectional microphone 62, and a directional microphone 63. The fifth omnidirectional microphone 61 and the sixth omnidirectional microphone 62 are arranged on the second long side of the printed circuit board body 1. The fifth omnidirectional microphone 61 is adjacent to the third omnidirectional microphone 53, and the sixth omnidirectional microphone 62 is adjacent to the fourth omnidirectional microphone 54.

[0055] The directional microphone 63 is located on the first long side of the printed circuit board body 1 and is arranged at the corner of the printed circuit board body 1 close to the power management unit 4.

[0056] The directional microphone 63, also known as a super-directional microphone, can only pick up sound in a single direction, and its sensitivity to sound data in the direction of sound pickup is higher than that of sound data in other directions.

[0057] ​The recording circuit control board provided in the embodiment of the present application can collect close-range sound data through the omnidirectional microphones in the microphone array, and the close-range sound data can be used for noise reduction, so that the main control chip 2 processes the close-range sound data collected by the microphone array, and the recording data obtained has higher accuracy when performing subsequent sound recognition and text transcription. In addition, the recording circuit control board provided in the embodiment of the present application can also collect long-range sound data through the directional microphone 63 in the microphone array, and since the directional microphone 63 has a higher sampling rate, the processing circuit processes the long-range sound data collected by the directional microphone 63, and the recording data obtained has higher fidelity and can clearly restore the recording scene, and the obtained recording data has better listening experience. Therefore, the recording circuit control board provided in the embodiment of the present application improves the sound collection effect of the recording equipment using the recording circuit control board by arranging the microphone array.

[0058] Please refer to Figure 4 , Figure 4 The second recording circuit control board provided in the embodiment of the present application is shown in the structure connection schematic diagram. Figure 4 The directional microphone 63 picks up long-range sound signals, and the two omnidirectional microphones pick up close-range sound signals. The picked-up sound signals are all transmitted to the main control chip 2, and the picked-up sound is processed through the DSP audio algorithm in the main control chip 2, and then two sound track files are obtained, including a third separated sound track and a fourth separated sound track. The third separated sound track represents a close-range sound file, that is, a user's sound file, and the fourth separated sound track represents a long-range sound file, that is, a sound file of a person around. The third separated sound track and the fourth separated sound track are transmitted to the storage chip 3 and saved respectively.

[0059] Preferably, the center distance between the fifth omnidirectional microphone 61 and the sixth omnidirectional microphone 62 is between 20mm and 40mm; and the center line of the directional microphone 63 is perpendicular to the printed circuit board body 1.

[0060] In the embodiment of the present application, the optimal center distance between the fifth omnidirectional microphone 61 and the sixth omnidirectional microphone 62 is 20mm. The directional microphone 63 needs to have directivity, and the pickup direction needs to be perpendicular to the printed circuit board body 1 and combined with the omnidirectional microphone. When the pickup angle of the directional microphone 63 is upward, the sound intensity picked up within 60 degrees of the forward direction of the microphone opening is greater than the sound intensity picked up outside 60 degrees by more than 6db, and then combined with the beamforming algorithm simulation processing, the sound intensity picked up within 60 degrees is greater than the sound intensity picked up outside 60 degrees by more than 10db.

[0061] Specifically, the above-mentioned directional microphone can be an electret microphone (ECM). The electret microphone here has the advantages of high precision and low price. The sampling rate of the electret microphone is higher than that of the silicon microphone. Usually, the sampling rate of the electret microphone is greater than or equal to 96k / 24bit. By adopting this sampling rate and combining it with the noise reduction algorithm, the recording data output by the main control chip 2 has higher fidelity, thereby restoring a more realistic and clear recording scene, and the obtained recording data has a better listening experience. In addition, the sound receiving distance of the electret microphone can reach more than 15 meters, so that the badge-type recording equipment can more accurately collect sound data from a long distance.

[0062] In the embodiment of the present application, the microphone array and the combined microphone array are integrated on a printed circuit board body 1, and further, a dip switch 7 is provided on the second long side and near the power management unit 4;

[0063] When the dial switch 7 is in the first position, the recording circuit control board uses the microphone array to work; when the dial switch 7 is in the second position, the recording circuit control board uses the combined microphone array to work.

[0064] In this way, the recording circuit control board can be controlled by controlling the DIP switch 7 to control which recording mode to use. In addition, there is also a third position. When the DIP switch 7 is in the third position, the recording circuit control board uses the microphone array and the combined microphone array to work simultaneously. Accordingly, the algorithm in the main control chip 2 must also be modified to meet the above requirements.

[0065] In addition, the DIP switch 7 can also control other structures on the recording circuit control board, which will not be described in detail here.

[0066] See also Figure 5 , Figure 5 This is a structural diagram of the third recording circuit control board provided in the embodiment of the present application, as shown in FIG. Figure 5 As shown in , the embodiment of the present application further provides a recording circuit control board, including a printed circuit board body 1, and a main control chip 2, a memory chip 3, a power management unit 4 and a microphone array arranged on the printed circuit board body 1, wherein the power management unit 4, the main control chip 2 and the memory chip 3 are arranged along the long side direction of the printed circuit board body 1;

[0067] The microphone array is arranged on the side of the printed circuit board body 1 where the main control chip 2 is arranged, and is distributed on both long sides of the printed circuit board body 1;

[0068] The microphone array is provided with one microphone on the first side long edge and at least two microphones on the second side long edge, and the center of the microphone on the first side long edge and the center of the microphone at the two ends on the second side long edge form an obtuse triangle.

[0069] Preferably, the microphone array comprises a seventh omnidirectional microphone 81, an eighth omnidirectional microphone 82 and a directional microphone 83, the seventh omnidirectional microphone 81 and the eighth omnidirectional microphone 82 are arranged on the second side long edge of the printed circuit board body 1, wherein the seventh omnidirectional microphone 81 is close to the power management unit 4, and the eighth omnidirectional microphone 82 is close to the storage chip 3; the center distance between the seventh omnidirectional microphone 81 and the eighth omnidirectional microphone 82 is between 20mm and 40mm.

[0070] The directional microphone 83 is arranged on the first side long edge of the printed circuit board body 1 and at the corner of the printed circuit board body 1 close to the power management unit 4.

[0071] In the embodiment, the position of the seventh omnidirectional microphone 81 in the microphone array is the position of the third omnidirectional microphone 53 or the fifth omnidirectional microphone 61, and the position of the eighth omnidirectional microphone 82 is the position of the fourth omnidirectional microphone 54 or the sixth omnidirectional microphone 62, and only the optimal center distance between the seventh omnidirectional microphone 81 and the eighth omnidirectional microphone 82 needs to be 30mm.

[0072] The structure provided in the embodiment is the same as the structure provided in the previous embodiment, and has the same technical effects, which will not be repeated here.

[0073] Based on the same technical concept, the application further provides a recording equipment comprising any one of the recording circuit control boards described above.

[0074] Since the recording circuit control board has the above technical effects, the recording equipment with the recording circuit control board also has the same technical effects, which will not be repeated here.

[0075] The embodiment of the application provides a recording circuit control board and recording equipment, which can reduce environmental noise in the picked-up sound information by combining the placement position of the microphone array and the algorithm in the main control chip corresponding to the placement position, and is beneficial to the classification of the picked-up sound.

[0076] Finally, it should be noted that the above-described embodiments are merely specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit the same. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any skilled person in the art can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features, within the technical scope disclosed by the present application. The modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A recording circuit control board, characterized in that: The device comprises a printed circuit board body, and a main control chip, a memory chip, a power management unit, a dip switch, a microphone array, and a combination microphone array arranged on the printed circuit board body, wherein the power management unit, the dip switch, the main control chip, and the memory chip are arranged along the long side of the printed circuit board body; The microphone array and the combined microphone array are arranged on the side of the printed circuit board body on which the main control chip is arranged, and are distributed on both long sides of the printed circuit board body; The microphone array includes a first omnidirectional microphone, a second omnidirectional microphone, a third omnidirectional microphone, and a fourth omnidirectional microphone. The first omnidirectional microphone is centrally located on the first long side of the printed circuit board body. The second omnidirectional microphone, the third omnidirectional microphone, and the fourth omnidirectional microphone are sequentially located on the second long side of the printed circuit board body. The lines connecting the centers of the first omnidirectional microphone, the second omnidirectional microphone, and the fourth omnidirectional microphone form an isosceles triangle. The combined microphone array includes a fifth omnidirectional microphone, a sixth omnidirectional microphone, and a directional microphone, the fifth omnidirectional microphone is adjacent to the third omnidirectional microphone, the sixth omnidirectional microphone is adjacent to the fourth omnidirectional microphone, and the one directional microphone is located on the first long side of the printed circuit board body; The dip switch is arranged on the second long side. When the dip switch is in a first position, the recording circuit control board uses the microphone array to work. When the dip switch is in a second position, the recording circuit control board uses the combined microphone array to work. When the dip switch is in a third position, the recording circuit control board uses the microphone array and the combined microphone array to work simultaneously. Wherein, the main control chip is configured as: Determining a corresponding target audio algorithm according to the target position of the DIP switch; receiving first audio simultaneously picked up by all microphones operating at the target location, and processing the first audio using a noise algorithm to obtain second audio; The target audio algorithm is used to process the second audio so as to separate the second audio into two audio track files, and the two audio track files are stored in the storage chip.

2. The recording circuit control board according to claim 1, characterized in that: The center of the second omnidirectional microphone, the center of the third omnidirectional microphone, and the center of the fourth omnidirectional microphone are collinear; The line connecting the center of the first omnidirectional microphone and the center of the third omnidirectional microphone is perpendicular to the line connecting the center of the second omnidirectional microphone and the center of the fourth omnidirectional microphone.

3. The recording circuit control board according to claim 2, characterized in that: The center distances between the first omnidirectional microphone and the third omnidirectional microphone, between the second omnidirectional microphone and the third omnidirectional microphone, and between the third omnidirectional microphone and the fourth omnidirectional microphone are all between 20 mm and 40 mm.

4. The recording circuit control board according to claim 2, characterized in that: The directional microphone is arranged at a corner of the printed circuit board body close to the power management unit.

5. The recording circuit control board according to claim 4, characterized in that: The center distance between the fifth omnidirectional microphone and the sixth omnidirectional microphone is between 20 mm and 40 mm.

6. The recording circuit control board according to claim 5, characterized in that: The center line of the directional microphone is perpendicular to the printed circuit board body.

7. A recording device, characterized in that: The recording circuit control board comprises the recording circuit control board as claimed in any one of claims 1 to 6.

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