CN211047148U - Recording circuit control panel and recording equipment - Google Patents

Abstract

The application provides a recording circuit control panel and recording equipment, wherein the recording circuit control panel comprises a printed circuit board body, and a main control chip, a storage chip, a power management unit and a microphone array which are arranged on the printed circuit board body, wherein the power management unit, the main 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 one surface of the printed circuit board body, which is provided with the main control chip, and is distributed on the long edges of the two sides of the printed circuit board body; the microphone array comprises a microphone array, a first side long edge and a second side long edge, wherein only one microphone is arranged on the first side long edge in the microphone array, a plurality of microphones are arranged on the second side long edge, and a connecting line of centers of the microphones on the first side long edge and centers of the microphones on the second side long edge at two ends 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 and the picking of the sound are facilitated.

Description

Recording circuit control panel and recording equipment

Technical Field

The application relates to the technical field of circuit control boards, in particular to a recording circuit control board and recording equipment.

Background

With the development of modern science and technology, digital products are continuously evolving from large computers which are initially bulky to small enough to be worn on the body, wherein the wearable recording device is widely used as it is carried along with activities of users every day.

Traditional recording equipment receives the sound information of external environment to discernment and record to external sound information, but along with the rapid development of electronic information technique, traditional recording equipment has been difficult to be adapted to the present of intelligent explosion development. The existing recording equipment carries out remote dispersive sound processing on the basis of traditional analog sound collection, so that the environment noise in the obtained sound information is too much, and the classification and the pickup of the sound are not facilitated.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the present application is to provide a recording circuit control board and a recording apparatus, which reduce the environmental noise in the sound information through the placement position of the microphone array, and are beneficial to the classification and pickup of the sound.

In a first aspect, an embodiment of the present application provides a recording circuit control board, including a printed circuit board body, and a main control chip, a storage chip, a power management unit and a microphone array that are disposed on the printed circuit board body, where the power management unit, the main control chip and the storage chip are arranged along a long side direction of the printed circuit board body;

the microphone array is arranged on one surface of the printed circuit board body, which is provided with the main control chip, and is distributed on the long edges of the two sides of the printed circuit board body;

the microphone array comprises a microphone array, a microphone and a microphone, wherein only one microphone is arranged on a first side long edge in the microphone array, a plurality of microphones are arranged on a second side long edge, and the connecting line of the centers of the microphones on the first side long edge and the centers of the microphones on the second side long edge at two ends forms an isosceles triangle.

Preferably, the microphone array comprises a first omnidirectional microphone, a second omnidirectional microphone, a third omnidirectional microphone and a fourth omnidirectional microphone;

the first omnidirectional microphone is arranged in the center of 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 sequentially arranged on the second side long edge of the printed circuit board body, and the center of the second omnidirectional microphone, the center of the third omnidirectional microphone and the center of the fourth omnidirectional microphone are collinear;

and a connecting line of the center of the first omnidirectional microphone and the center of the third omnidirectional microphone is perpendicular to a connecting line of the center of the second omnidirectional microphone and the center of the fourth omnidirectional microphone.

Preferably, 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 20mm and 40 mm.

Preferably, the microphone array is arranged on the same surface of the printed circuit board body as the microphone array;

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

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

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

Preferably, the centre line of the directional microphone is perpendicular to the printed circuit board body.

Preferably, a dial switch is arranged on the second side long edge and at a position close to the power management unit;

when the dial switch is at a first position, the recording circuit control board works by adopting the microphone array; when the dial switch is in the second position, the recording circuit control board works by adopting the combined microphone array.

In a second aspect, an embodiment of the present application further provides a recording circuit control board, including a printed circuit board body, and a main control chip, a storage chip, a power management unit and a microphone array that are disposed on the printed circuit board body, where the power management unit, the main control chip and the storage chip are arranged along a long side direction of the printed circuit board body;

the microphone array is arranged on one surface of the printed circuit board body, which is provided with the main control chip, and is distributed on the long edges of the two sides of the printed circuit board body;

the microphone array comprises a microphone array, a first side long edge and a second side long edge, wherein the first side long edge in the microphone array is provided with a microphone, the second side long edge is provided with at least two microphones, and a connecting line of centers of the microphones on the first side long edge and centers of the microphones on the second side long edge at two ends forms an obtuse triangle.

Preferably, the microphone array includes a seventh omnidirectional microphone, an eighth omnidirectional microphone and a directional microphone, the seventh omnidirectional microphone and the eighth omnidirectional microphone are disposed on the second long side 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 memory chip; the center distance between the seventh omnidirectional microphone and the eighth omnidirectional microphone is 20-40 mm;

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

In a third aspect, an embodiment of the present application provides a sound recording apparatus, including the sound recording circuit board described in the first aspect and the second aspect.

The embodiment of the application provides a recording circuit control panel and recording equipment, wherein the recording circuit control panel comprises a printed circuit board body, a main control chip, a storage chip, a power management unit and a microphone array, wherein the main control chip, the storage chip, the power management unit and the microphone array are arranged on the printed circuit board body; the microphone array is arranged on one surface of the printed circuit board body, which is provided with the main control chip, and is distributed on the long edges of the two sides of the printed circuit board body; the microphone array comprises a microphone array, a first side long edge and a second side long edge, wherein only one microphone is arranged on the first side long edge in the microphone array, a plurality of microphones are arranged on the second side long edge, and a connecting line of centers of the microphones on the first side long edge and centers of the microphones on the second side long edge at two ends forms an isosceles triangle.

According to the scheme, the microphones on the long edges of the first side and the microphones on the long edges of the second side pick up sound simultaneously according to the placing mode of the microphone array, the picked sound is processed through an audio algorithm in the main control chip, so that the microphones on the long edges of the first side are mainly used for picking up the sound, the microphones on the long edges of the second side are mainly used for shielding noise, noise in the surrounding environment is eliminated, and finally two clear audio track files are obtained and stored in the storage chip. Furthermore, the placing mode of the microphone array can reduce the environmental noise in the sound information, and is favorable for classifying and picking up the sound.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a first recording circuit control board according to an embodiment of the present disclosure;

fig. 2 is a schematic structural connection diagram of a control board of a first recording circuit according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a second recording circuit control board according to an embodiment of the present disclosure;

fig. 4 is a schematic structural connection diagram of a second recording circuit control board according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a third recording circuit control board according to an embodiment of the present disclosure.

Reference numerals: 1-a printed circuit board body; 2-a main control chip; 3-a memory chip; 4-a power management unit; 51-a first omnidirectional microphone; 52-a second omnidirectional microphone; 53-third omni-directional wheat; 54-a fourth omni-directional microphone; 61-fifth Omni; 62-sixth omni-directional wheat; 63, 83-directional barley; 7-a dial switch; 81-seventh omni-directional wheat; 82-eighth omnidirectional wheat.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

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 orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In order to enable a person skilled in the art to use the present disclosure, the following embodiments are given in connection with a specific application scenario "chest card recorder". It will be apparent to those skilled in the art that the recording circuit board defined herein may be applied to other embodiments and other application scenarios without departing from the scope of the present application, such as: recording pens, telephone recording boxes, etc. Although the present application is described primarily in the context of a recording circuit board applied to a chest card recording device, it should be understood that this is merely one exemplary embodiment.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a first recording circuit control board provided in an embodiment of the present application, and as shown in fig. 1, the embodiment of the present application provides a recording circuit control board, which includes a printed circuit board body 1, and a main control chip 2, a storage chip 3, a power management unit 4 and a microphone array that are arranged on the printed circuit board body 1, where the power management unit 4, the main control chip 2 and the storage chip 3 are arranged along a long side direction of the printed circuit board body 1; the power management unit 4 is used for supplying power, a DSP audio algorithm is stored in the main control chip 2 and used for carrying out operation processing on the picked sound, and the storage chip 3 is used for storing the audio track file processed by the main control chip 2.

The microphone array is arranged on one surface of the printed circuit board body 1, which is provided with the main control chip 2, and is distributed on the long edges of the two sides of the printed circuit board body 1; the microphone array comprises a microphone array, a first side long edge and a second side long edge, wherein only one microphone is arranged on the first side long edge in the microphone array, a plurality of microphones are arranged on the second side long edge, and a connecting line of centers of the microphones on the first side long edge and centers of the microphones on the second side long edge at two ends forms an isosceles triangle.

Specifically, according to the placing mode of the microphone array and the combination of the audio algorithm in the main control chip 2, the microphone on the long edge of the first side and the microphone on the long edge of the second side pick up sound at the same time, and the picked sound is processed through the audio algorithm in the main control chip 2, so that the microphone on the long edge of the first side is mainly used for picking up sound, the microphone on the long edge of the second side is mainly used for shielding noise and eliminating noise in the surrounding environment, and finally two clear track files are obtained and stored in the storage chip 3.

Optionally, the process of processing the sound signal by the main control chip 2 may include: and respectively carrying out sound algorithm operation, data scheduling transmission, peripheral cooperative logic control and interactive management of system application on the digital audio signals. Optionally, before the main control chip 2 processes the digital audio signal, the main control chip may also perform noise reduction processing on the received digital audio signal based on a noise reduction algorithm.

In the scheme, when a user needs to record own calls with other people, the calls can be recorded through a chest card type recording device, the microphone array on the recording circuit control panel picks up external sound information, then data processing is carried out through a DSP algorithm on the main control chip 2, so that the picked sound information is divided into two paths of sound track files to be stored in the storage chip 3, and finally the sound track files stored in the storage chip 3 can be transmitted to the acquisition station through a USB interface or Bluetooth for data storage and uploading.

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;

the first omnidirectional microphone 51 is arranged on the first side long edge of the printed circuit board body 1 in the center, the second omnidirectional microphone 52, the third omnidirectional microphone 53 and the fourth omnidirectional microphone 54 are arranged on the second side long edge of the printed circuit board body 1 in sequence, 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;

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

Preferably, the center-to-center distances between the first omni-directional microphone 51 and the third omni-directional microphone 53, between the second omni-directional microphone 52 and the third omni-directional microphone 53, and between the third omni-directional microphone 53 and the fourth omni-directional microphone 54 are all between 20mm and 40 mm.

In this scheme, the optimal center distances between the first omni-directional microphone 51 and the third omni-directional microphone 53, between the second omni-directional microphone 52 and the third omni-directional microphone 53, and between the third omni-directional microphone 53 and the fourth omni-directional microphone 54 are all 20 mm. According to the placing positions of the omnidirectional microphones and the center distance between two adjacent omnidirectional microphones, an algorithm running in the main control chip 2 is designed, the algorithm is 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 processing, so that a sound file with good fidelity can be obtained.

Referring to fig. 2, fig. 2 is a schematic structural connection diagram of a first recording circuit control board according to an embodiment of the present disclosure; as shown in fig. 2, four omnidirectional microphones simultaneously pick up surrounding sounds, then transmit the sounds to the main control chip 2, and perform operation processing on the picked-up sounds through a DSP audio algorithm in the main control chip 2, where the processed sounds are divided into two tracks, the separated track 1 is a sound file of a user, the separated track 2 is a sound file of a surrounding person, and the two tracks are stored in the storage chip 3, respectively.

Specifically, the omnidirectional microphone of the present application may be a silicon microphone, and the silicon microphone may also be referred to as a micro-electromechanical microphone (memmicphone) or a microphone chip, which has the advantages of high sensitivity, consistent phase, good stability, small volume, etc., and the sound data acquired by the silicon microphone is beneficial to the main control chip 2 to accurately position the sound source and calculate the narrow beam based on the beam forming principle, so as to achieve the function of noise reduction; the sampling rate of the silicon microphone is usually more than or equal to 16k/24bit, and by adopting the sampling rate and combining with algorithms such as accurate sound source positioning, narrow beam noise reduction, echo cancellation and the like, the quality of the recorded data output by the main control chip 2 is higher, and the accuracy of the recorded data is higher when sound recognition and text transcription are subsequently carried out; in addition, under the normal condition, the sound receiving distance of the silicon microphone can reach 5 meters to 8 meters, so that the chest card type recording equipment can more accurately acquire close-range sound data.

To sum up, according to the placing mode of the microphone array and by combining the audio algorithm in the main control chip 2, the microphone on the long edge of the first side and the microphone on the long edge of the second side pick up the sound at the same time, and the picked-up sound is processed by the audio algorithm in the main control chip 2, so that the microphone on the long edge of the first side is mainly used for picking up the sound, the microphone on the long edge of the second side is mainly used for shielding noise, eliminating the noise in the surrounding environment, and finally, two clear track files are obtained and stored in the storage chip 3. Furthermore, the placing mode of the microphone array can reduce the environmental noise in the sound information, and is favorable for classifying and picking up the sound.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a second recording circuit control board according to an embodiment of the present application; as shown in fig. 3, the recording circuit control board further includes a combined microphone array, and the combined microphone array and the microphone array are located on the same surface of the printed circuit board body 1;

the combined microphone array comprises a fifth omnidirectional microphone 61, a sixth omnidirectional microphone 62 and a directional microphone 63, wherein the fifth omnidirectional microphone 61 and the sixth omnidirectional microphone 62 are arranged on the second side long edge 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;

the directional microphone 63 is located on the first side long edge of the printed circuit board body 1 and is disposed at the corner of the printed circuit board body 1 near the power management unit 4.

The directional microphone 63 is also called a super directional microphone, and the directional microphone 63 can only pick up sound towards a single direction, and the sensitivity of the directional microphone to sound data in the pick-up direction is higher than that of sound data in other directions.

The recording circuit control board provided by the embodiment of the application can acquire the short-distance sound data through the omnidirectional microphone in the combined microphone array, and the short-distance sound data can be used for noise reduction, so that the main control chip 2 processes the short-distance sound data acquired by the combined microphone array, and the accuracy of the obtained recording data is higher during subsequent voice recognition and text transcription. Moreover, the recording circuit control board provided by the embodiment of the application can also acquire remote sound data through the directional microphone 63 in the combined microphone array, and because the directional microphone 63 has a higher sampling rate, the processing circuit processes the remote sound data acquired by the directional microphone 63, so that the obtained recording data has higher fidelity, a recording site can be restored more clearly, and the obtained recording data has better hearing sense. Therefore, the sound receiving effect of the sound recording equipment using the sound recording circuit control board is improved by arranging the combined microphone array.

Referring to fig. 4, fig. 4 is a schematic structural connection diagram of a second recording circuit control board according to an embodiment of the present disclosure; as shown in fig. 4, the directional microphone 63 picks up a far distance sound signal, the two omnidirectional microphones pick up a near distance sound signal, the picked sound signals are all transmitted to the main control chip 2, the picked sound is processed through a DSP audio algorithm in the main control chip 2, and then two paths of track files are obtained, wherein the separation track 1 represents a near distance sound file, i.e., a user sound file, and the separation track 2 represents a far distance sound file, i.e., a surrounding people sound file; the two paths of audio tracks are transmitted to the storage chip 3 and are respectively stored.

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

In the embodiment of the present application, the optimal center distance between the fifth omni-directional microphone 61 and the sixth omni-directional microphone 62 is 20 mm. The directional microphone 63 needs to be placed in a directive mode, the sound pickup direction needs to be placed perpendicular to the printed circuit board body 1, the directional microphone 63 and the omnidirectional microphone are combined together, when the upward sound pickup angle of the directional microphone 63 is controlled by a device and a structural opening hole to pick up sounds with the same intensity, the intensity of the sound picked up in the forward 60 degrees of the microphone opening hole is larger than the intensity of the sound picked up outside the 60 degrees by more than 6db, and then the beam forming algorithm simulation (beamforming) processing is combined, so that the effect that the intensity of the sound picked up in the forward 60 degrees range is larger than the intensity of the sound picked up outside the 60 degrees by more than 10db is achieved.

Specifically, the directional microphone may be an Electret microphone (ECM), which has the advantages of high precision, low price, and the like; the sampling rate of the electret microphone is higher than that of the silicon microphone, the sampling rate of the electret microphone is larger than or equal to 96k/24bit under the normal condition, the sampling rate is adopted, and a noise reduction algorithm is combined, so that the recorded data output by the main control chip 2 has higher fidelity, a more real and clear recorded site can be restored, and the obtained recorded data has better hearing sense; in addition, the reception distance of the electret microphone can reach more than 15 meters, so that the chest card type recording equipment can accurately acquire remote sound data.

In the embodiment of the application, the microphone array and the combined microphone array are integrated on one printed circuit board body 1, and furthermore, a dial switch 7 is arranged on the second side long edge and at a position close to the power management unit 4;

when the dial switch 7 is at the first position, the recording circuit control board works by adopting a microphone array; when the dial switch 7 is at the second position, the recording circuit control board works by adopting the combined microphone array.

Thus, the dial switch 7 can be controlled to control which mode is adopted by the recording circuit control board to record. In addition, the microphone array and the combined microphone array are adopted by the recording circuit control board to work simultaneously when the dial switch 7 is located at the third position, and correspondingly, the algorithm in the main control chip 2 needs to be modified so as to meet the requirements.

Besides, the dial switch 7 can also control other structures on the control board of the recording circuit, which is not described in detail herein.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a third recording circuit control board provided in the present embodiment, as shown in fig. 5, the present embodiment further provides a recording circuit control board, which includes a printed circuit board body 1, and a main control chip 2, a storage chip 3, a power management unit 4 and a microphone array that are disposed on the printed circuit board body 1, where the power management unit 4, the main control chip 2 and the storage chip 3 are arranged along a long side direction of the printed circuit board body 1;

the microphone array is arranged on one surface of the printed circuit board body 1, which is provided with the main control chip 2, and is distributed on the long edges of the two sides of the printed circuit board body 1;

the microphone array comprises a microphone array, a first side long edge and a second side long edge, wherein the first side long edge in the microphone array is provided with a microphone, the second side long edge is provided with at least two microphones, and a connecting line of centers of the microphones on the first side long edge and centers of the microphones on the second side long edge at two ends forms an obtuse triangle.

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 memory chip 3; the center distance between the seventh omnidirectional microphone 81 and the eighth omnidirectional microphone 82 is between 20mm and 40 mm;

the directional microphone 83 is located on the first side long side of the printed circuit board body 1 and is disposed at the corner of the printed circuit board body 1 near the power management unit 4.

In the embodiment of the present application, the position of the seventh omni-directional microphone 81 in the microphone array is the position of the third omni-directional microphone 53 or the fifth omni-directional microphone 61, and the position of the eighth omni-directional microphone 82 is the position of the fourth omni-directional microphone 54 or the sixth omni-directional microphone 62, so that the optimal center distance between the seventh omni-directional microphone 81 and the eighth omni-directional microphone 82 is only required to be 30 mm.

Parts of the structure provided by the embodiment of the present application, which are the same as the structure provided by the previous embodiment, also have the same technical effects, and are not described in detail herein.

Based on the same technical concept, the application also provides a recording device which comprises any one of the recording circuit control boards.

Since the recording circuit control board has the technical effects, the recording device with the recording circuit control board also has the same technical effects, and the details are not repeated herein.

The embodiment of the application provides a recording circuit control panel and recording equipment, combines the locating position of microphone array and the algorithm in the main control chip that corresponds with the locating position, can reduce the ambient noise among the sound information of picking up, is favorable to the categorised of sound to pick up.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the exemplary embodiments of the present application, and are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A recording circuit control board is characterized by comprising a printed circuit board body, and a main control chip, a storage chip, a power management unit and a microphone array which are arranged on the printed circuit board body, wherein the power management unit, the main 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 one surface of the printed circuit board body, which is provided with the main control chip, and is distributed on the long edges of the two sides of the printed circuit board body;

the microphone array comprises a microphone array, a microphone and a microphone, wherein only one microphone is arranged on a first side long edge in the microphone array, a plurality of microphones are arranged on a second side long edge, and the connecting line of the centers of the microphones on the first side long edge and the centers of the microphones on the second side long edge at two ends forms an isosceles triangle.

2. The recording circuit control board of claim 1, wherein the array of microphones comprises a first omni-directional microphone, a second omni-directional microphone, a third omni-directional microphone, and a fourth omni-directional microphone;

the first omnidirectional microphone is arranged in the center of 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 sequentially arranged on the second side long edge of the printed circuit board body, and the center of the second omnidirectional microphone, the center of the third omnidirectional microphone and the center of the fourth omnidirectional microphone are collinear;

and a connecting line of the center of the first omnidirectional microphone and the center of the third omnidirectional microphone is perpendicular to a connecting line of the center of the second omnidirectional microphone and the center of the fourth omnidirectional microphone.

3. The recording circuit control board of claim 2, wherein the center distances between the first omni-directional microphone and the third omni-directional microphone, between the second omni-directional microphone and the third omni-directional microphone, and between the third omni-directional microphone and the fourth omni-directional microphone are all between 20mm and 40 mm.

4. The recording circuit control board of claim 2, further comprising a combination microphone array on the same side of the printed circuit board body as the microphone array;

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

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

5. The recording circuit control board of claim 4, wherein the center distance between the fifth omni-directional microphone and the sixth omni-directional microphone is 20mm to 40 mm.

6. The recording circuit control board of claim 5, wherein the center line of the directional microphone is perpendicular to the printed circuit board body.

7. The recording circuit control board of claim 4, wherein a dial switch is disposed on the second side long edge and near the power management unit;

when the dial switch is at a first position, the recording circuit control board works by adopting the microphone array; when the dial switch is in the second position, the recording circuit control board works by adopting the combined microphone array.

8. A recording circuit control board is characterized by comprising a printed circuit board body, and a main control chip, a storage chip, a power management unit and a microphone array which are arranged on the printed circuit board body, wherein the power management unit, the main 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 one surface of the printed circuit board body, which is provided with the main control chip, and is distributed on the long edges of the two sides of the printed circuit board body;

the microphone array comprises a microphone array, a first side long edge and a second side long edge, wherein the first side long edge in the microphone array is provided with a microphone, the second side long edge is provided with at least two microphones, and a connecting line of centers of the microphones on the first side long edge and centers of the microphones on the second side long edge at two ends forms an obtuse triangle.

9. The recording circuit control board of claim 8, wherein 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 being disposed on the second long side of the printed circuit board body, wherein the seventh omnidirectional microphone is located near the power management unit and the eighth omnidirectional microphone is located near the memory chip; the center distance between the seventh omnidirectional microphone and the eighth omnidirectional microphone is 20-40 mm;

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

10. A sound recording apparatus comprising the sound recording circuit board according to any one of claims 1 to 7, or the sound recording circuit board according to any one of claims 8 to 9.

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