Digital microphone array and audio system applying same
By designing an interconnected digital microphone array, the coordinated work of the main control function board and multiple microphone boards is solved, and the problem of poor performance of using the array alone in large occasions is achieved, achieving better audio acquisition effect and anti-interference ability.
Patent Information
- Application Number
- CN202420893137.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-27
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-27
AI Technical Summary
Digital microphone arrays used alone are not effective in larger occasions, and multiple arrays are not interconnected, resulting in interference and poor audio acquisition.
Design a digital microphone array, through the coordinated work of the main control function board and multiple microphone boards, use the RJ45 network interface to realize the interconnection between the arrays, and combine the secondary battery and multi-function digital interface to support the POE interface to simplify wiring and power supply. supply.
The collaborative work of multiple microphone arrays is realized, which reduces interference and improves the clarity and quality of audio acquisition, and is suitable for audio applications in larger occasions.
Smart Images
Figure CN222262967U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of audio equipment, and in particular to a digital microphone array and an audio system using the same. Background Art
[0002] A microphone array is a collection of multiple microphone units, usually arranged in a linear, circular or rectangular form. Each microphone unit has its own sensing element and signal processing circuit. These microphone units can capture sounds from different directions at the same time, and use algorithms to direct and enhance the sound.
[0003] At present, digital microphones or microphone arrays are generally used alone and cannot be interconnected to form multiple arrays. In particular, in larger occasions, independent microphone array monomers cannot achieve good results, which makes their application have great limitations. When using multiple microphone arrays, since they cannot be interconnected and audio is collected separately at the same time, on the one hand, due to the distance between the speaker and the microphone, as well as the sensitivity, multiple independent microphone array monomers are easily interfered with each other when mixed, thereby affecting the use effect. Therefore, the utility model proposes a digital microphone array and an audio system using the same, so as to at least partially solve the problems that may exist in the prior art. Utility Model Content
[0004] The purpose of the utility model is to provide a digital microphone array and an audio system using the same, which can propose solutions to the deficiencies of the prior art, overcome the limitations of traditional microphone arrays used alone, and provide better audio collection effects.
[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0006] A digital microphone array, comprising:
[0007] The bottom shell and the cover shell assembly form a receiving space;
[0008] A main control function board is arranged in the accommodation space, and a function interface exposed to the bottom shell is arranged on the main control function board, and the function interface includes an audio interface, a power interface and at least one RJ45 network interface; the main control function board is electrically connected to the first microphone board and / or the second microphone board;
[0009] The cover shell assembly has a mesh surface; the first microphone board and the second microphone board are provided with a plurality of microphones facing the mesh surface.
[0010] Optionally, a secondary battery is further provided in the accommodating space, and the secondary battery is electrically connected to the main control function board.
[0011] Optionally, the functional interface also includes a multifunctional digital interface; the multifunctional digital interface is a USB interface, a MICRO-USB interface or a TYPE-C interface.
[0012] Optionally, a remote control signal unit is also provided on the main control function board.
[0013] Optionally, screws are provided inside the bottom shell, and a support sheet is provided outside the bottom shell; through holes are provided in the middle of the support sheet and in the bottom shell;
[0014] The bracket is provided with a screw rod, and the screw rod can be adapted and connected with the screw hole of the screw.
[0015] Optionally, the secondary battery is a lithium battery.
[0016] Optionally, the audio interface is a 3.5mm interface.
[0017] Optionally, the RJ45 network interface is a POE interface.
[0018] An audio system comprises: a mixer, a multifunctional host, an operation terminal and at least one digital microphone array;
[0019] The digital microphone array is electrically connected to the mixer via a network cable; the mixer is electrically connected to the multifunctional host via a 3.5mm audio cable; and the multifunctional host is connected to the operation terminal via the Internet.
[0020] Optionally, the multifunctional host is a recording and broadcasting host or a live broadcasting host or an integrated recording and broadcasting and live broadcasting host.
[0021] Optionally, the operating terminal includes a PC, a tablet computer, a smart screen and a mobile phone that can be connected to the Internet.
[0022] The utility model has at least the following advantages or beneficial effects:
[0023] A storage space is formed by the bottom shell and the cover shell assembly; a main control function board is arranged in the storage space, and the main control function board is provided with function interfaces exposed to the bottom shell, and the function interfaces include an audio interface, a power interface and at least one RJ45 network interface; the main control function board is electrically connected to the first microphone board and / or the second microphone board; the cover shell assembly has a mesh surface; the first microphone board and the second microphone board are provided with a plurality of microphones facing the mesh surface. The above-mentioned digital microphone array eliminates the limitations of the traditional single-use microphone array, realizes interconnection and collaborative work, and can effectively solve the interference and poor effect caused by the distance between the speaker and the microphone, the sensitivity difference, etc. At the same time, the cooperative acquisition of multiple microphone boards and the application of digital signal processing technology improve the clarity and quality of the audio and enhance the overall audio acquisition effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0025] Figure 1 A schematic diagram of an exploded structure of a digital microphone array provided in one embodiment of the utility model;
[0026] Figure 2 A schematic diagram of the appearance structure of a digital microphone array provided in one embodiment of the utility model;
[0027] Figure 3 A schematic structural diagram of an audio system provided in one embodiment of the utility model.
[0028] In the accompanying drawings: 100, digital microphone array; 101, bottom shell; 102, cover shell assembly; 103, main control function board; 105, RJ45 network interface; 106, audio interface; 107, power interface; 108, TYPE-C interface; 109, secondary battery; 111, remote control signal unit; 112, first microphone board; 113, second microphone board; 114, screw; 115, support sheet; 116, bracket; 200, mixer; 300, multi-function host; 400, Internet; 500, operation terminal. DETAILED DESCRIPTION
[0029] In order to make the objectives, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.
[0030] Example 1
[0031] Please refer to Figure 1 and Figure 2 As shown, a digital microphone array 100 provided in this embodiment includes: a bottom shell 101 and a cover shell assembly 102 forming a storage space; a main control function board 103 is arranged in the storage space, and the main control function board 103 is provided with a functional interface exposed to the bottom shell 101, and the functional interface includes an audio interface 106, a power interface 107 and at least one RJ45 network interface 105; the main control function board 103 is electrically connected to the first microphone board 112 and / or the second microphone board 113; the cover shell assembly 102 has a mesh surface; the first microphone board 112 and the second microphone board 113 are provided with a plurality of microphones facing the mesh surface.
[0032] In the embodiment of the present application, the above-mentioned digital microphone array 100 realizes the interconnection of multiple digital microphone arrays 100 and the cooperation of multiple microphone boards inside through the network interface on the main control function board 103, which solves the limitations of the traditional microphone array used alone and provides a better audio collection effect; specifically, the above-mentioned control function board 103 has multiple functional interfaces, including an audio interface 106, a power interface 107 and an RJ45 network interface, to realize the interconnection of the microphone array 100. Multiple arrays can be connected together through the network interface and work together. In the application scenario of larger occasions, multiple digital microphone arrays 100 can be combined and used to form a larger array system to cover a wider range of sounds. The microphone board in the digital microphone array 100 is installed on the cover shell assembly 102 and faces the mesh surface, which can make full use of the collection capabilities of multiple microphone boards while avoiding mutual interference. The multiple microphones on each microphone board can collect different sound sources respectively, and mix and process them through digital signal processing technology, thereby improving the overall audio quality and clarity.
[0033] Example 2
[0034] A digital microphone array 100, wherein a secondary battery 109 is also provided in the accommodating space, and the secondary battery 109 is electrically connected to the main control function board 103; through the above-mentioned secondary battery, on the one hand, it can be used in a position where it is inconvenient to connect to a power source, and the secondary battery 109 can provide a charging function, and there is no need to consider the situation of replacing the battery; the above-mentioned secondary battery 109 is preferably a lithium battery to increase the battery storage capacity.
[0035] It should be noted that a secondary battery is a rechargeable battery, also known as a storage battery or energy storage battery. Unlike disposable batteries, secondary batteries can be repeatedly charged and discharged by an external power source for repeated use. Secondary batteries are usually composed of a positive electrode, a negative electrode, and an electrolyte, among which the positive and negative electrodes are usually metal or alloy materials, and the electrolyte is the conductive medium required for chemical reactions. During the charging process, the positive electrode releases electrons, which will flow along the external circuit, while the negative electrode absorbs these electrons and stores them.
[0036] As a preferred implementation, the functional interface also includes a multi-function digital interface; the multi-function digital interface is a USB interface or a MICRO-USB interface or a TYPE-C interface 108. The multi-function digital interface can be used to send and receive digital audio or perform audio debugging on the device.
[0037] As a preferred implementation, the main control function board 103 is further provided with a remote control signal unit 111, which is used to receive signals from a remote control. The digital microphone array 100 can be operated through the remote control without direct physical contact.
[0038] As a preferred embodiment, the bottom shell 101 is provided with screws 114 inside, and the bottom shell 101 is provided with a support sheet 115 outside; through holes are provided in the middle of the support sheet 115 and in the bottom shell 101; a screw rod is provided on the bracket 116, and the screw rod can be connected with the screw hole of the screw 114. Through the above bracket 116, it can be installed on a desktop or wall, etc., because it can realize digital audio signal transmission through the RJ45 network interface 105, it can support long-distance signal transmission, and take the transmission of network signals by class-A cable as a reference, its transmission distance can be greater than 100 meters; for this reason, when using multiple digital microphone arrays 100, they are connected through network cables, so that the transmission can be separated by a long distance, for example, in different rooms.
[0039] As a preferred implementation, the audio interface 106 is a 3.5 mm interface.
[0040] As a preferred implementation, the RJ45 network interface 105 is a POE interface. Through the POE interface, it does not need to be powered separately when in use. It can be powered directly through the network cable connected to it, thereby saving wiring costs and making its connection easier.
[0041] It should be noted that POE (Power over Ethernet) is a technology that allows data to be transmitted over Ethernet cables while providing power supply to network devices. Traditionally, network devices usually require independent power adapters or power cords to be connected to power outlets. With POE technology, data and power can be transmitted over the same Ethernet cable, simplifying the installation and wiring process of the equipment. POE technology is based on the IEEE 802.3af and IEEE 802.3at standards, and transmits power through additional wire pairs in Ethernet cables. These wire pairs are usually unused, so they can be used to pass DC power. POE devices include POE power supply equipment (PSE) and POE terminal devices (PD). PSE is a device used to provide power, such as a switch or injector, while PD is a device that needs to receive power, such as IP phones, wireless access points, network cameras, etc. The advantages of POE technology include simplified wiring, reduced costs, increased flexibility and reliability. It allows network devices to be installed away from power outlets, reducing the number and length of cables. In addition, POE also has intelligent power management functions that can monitor and control the status of power supply equipment and provide appropriate power to terminal devices.
[0042] Example 3
[0043] Reference Figure 3 As shown, an audio system includes: a mixer 200, a multi-function host 300, an operation terminal 500 and at least one of the above-mentioned digital microphone arrays 100; the above-mentioned digital microphone array 100 is electrically connected to the above-mentioned mixer 200 via a network cable; the above-mentioned mixer 200 obtains audio input from the above-mentioned digital microphone array 100 via the network cable, and simultaneously powers it through the network cable, the above-mentioned mixer 200 is electrically connected to the multi-function host 300 via a 3.5mm audio cable; the multi-function host 300 is connected to the operation terminal 500 via the Internet.
[0044] In this embodiment, the audio system uses a network cable to enable the digital microphone array 100 to be directly connected to the mixer 200, and can also receive power supply from the mixer 200, which saves additional power cables and cumbersome wiring processes, making the system more concise, flexible and easy to maintain; through the transmission of digital signals, the audio system has better anti-interference ability and transmission stability, reducing problems such as signal distortion and noise interference; the above-mentioned multi-function host 300 can provide more audio processing and control functions, recording and playback, etc., and also control adjustments such as equalizers, compressors, effects, etc., so that it is suitable for different types of audio application scenarios and achieves a higher level of audio processing and control; the audio system supports a variety of different device connection methods, such as the digital microphone array 100 and the operation terminal 500 are connected via a network cable and the Internet, which facilitates the expansion and management of multiple devices. The audio system has the advantages of convenience, stability, functionality and scalability, and is suitable for various audio application scenarios, such as performances, meetings, recordings, etc.
[0045] The mixer 200 may be the DM300 mixer of Income, which uses the DeL.Reverberation technology to clearly remove the reverberation in large conference rooms, classrooms, lecture halls and other environments. In combination with the digital microphone array 100, a single digital microphone array 100 can support a pickup distance of 8 meters and has an excellent pickup effect. Figure 3 As shown, it can support cascading of 4 digital microphone array 100 units, which is suitable for use in a space of 100-500㎡; the digital microphone array 100 can cooperate with the above-mentioned bracket 106 to support a variety of usage scenarios such as ceiling, wall and desktop, and can be used in video conferencing, lecture halls or education and training. The system has the advantages of easy use and quick deployment.
[0046] As a preferred implementation, the multifunctional host 300 is a recording and broadcasting host or a live broadcasting host or an integrated recording and broadcasting and live broadcasting host. In this application, it is preferred to use an integrated recording and broadcasting and live broadcasting host. On the one hand, real-time conversations can be conducted, for example, it can be applied to audio and video conferencing scenarios. On the other hand, the content of the meeting can also be reviewed.
[0047] As a preferred embodiment, the operation terminal 500 includes a PC, a tablet computer, a smart screen, and a mobile phone that can be connected to the Internet 400. The audio system can be controlled by different types of operation terminals 500. For example, a conference system can be opened through a mobile phone to realize a remote audio and video conference.
[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
[0049] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0050] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.
[0051] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.
[0052] The digital microphone array and the audio system using the digital microphone array provided by the present invention are introduced in detail above. The principle and implementation mode of the present invention are explained by using specific examples in this article. The description of the above embodiments is only used to help understand the method and core idea of the present invention. At the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation mode and the scope of application. In summary, the content of this specification should not be understood as a limitation on the present invention.
Claims
1. A digital microphone array (100), characterized in that: include: The bottom shell (101) and the cover shell assembly (102) form a receiving space; A main control function board (103) is arranged in the accommodation space, and a function interface exposed from the bottom shell (101) is arranged on the main control function board, and the function interface includes an audio interface (106), a power interface (107) and at least one RJ45 network interface (105); the main control function board (103) is electrically connected to the first microphone board (112) and / or the second microphone board (113); The cover shell component (102) has a mesh surface; the first microphone board (112) and the second microphone board (113) are provided with a plurality of microphones facing the mesh surface.
2. The digital microphone array (100) according to claim 1, characterized in that: A secondary battery (109) is also provided in the accommodation space, and the secondary battery (109) is electrically connected to the main control function board (103).
3. The digital microphone array (100) according to claim 1, characterized in that: The functional interface also includes a multifunctional digital interface; the multifunctional digital interface is a USB interface, a MICRO-USB interface or a TYPE-C interface (108).
4. The digital microphone array (100) according to claim 1, characterized in that: The main control function board (103) is also provided with a remote control signal unit (111).
5. The digital microphone array (100) according to claim 1, characterized in that: A screw (114) is provided inside the bottom shell (101), and a support sheet (115) is provided outside the bottom shell (101); through holes are provided in the middle of the support sheet (115) and in the bottom shell (101); The bracket (116) is provided with a screw rod, and the screw rod can be adapted to be connected with the screw hole of the screw (114).
6. The digital microphone array (100) according to claim 2, characterized in that: The secondary battery (109) is a lithium battery.
7. The digital microphone array (100) according to claim 1, characterized in that: The audio interface (106) is a 3.5 mm interface.
8. The digital microphone array (100) according to claim 1, characterized in that: The RJ45 network interface (105) is a POE interface.
9. An audio system, characterized in that: include: A mixer (200), a multifunctional host (300), an operation terminal (500), and at least one digital microphone array (100) according to any one of claims 1 to 8; The digital microphone array (100) is electrically connected to the mixer (200) via a network cable; the mixer (200) is electrically connected to the multifunctional host (300) via a 3.5 mm audio cable; and the multifunctional host (300) is connected to the operation terminal (500) via the Internet.
10. The audio system according to claim 9, characterized in that The multifunctional host (300) is a recording and broadcasting host or a live broadcasting host or a recording and broadcasting and live broadcasting integrated host.