Digital conference sound reinforcement loudspeaker

Abstract

The utility model relates to the technical field of digital conference audio equipment, and discloses a digital conference sound reinforcement loudspeaker, which comprises a main loudspeaker mechanism, the main loudspeaker mechanism comprises a main sound box, a plurality of auxiliary loudspeaker mechanisms are arranged outside the main sound box, the auxiliary loudspeaker mechanisms comprise auxiliary sound boxes, and the auxiliary sound boxes are arranged on the main sound box. The main sound box is connected with the plurality of auxiliary sound boxes through first audio lines, a first loudspeaker is arranged above the front end of the main sound box, and a second loudspeaker is arranged at the front end of each auxiliary sound box. By adopting an optimized audio processing structure design, the digital audio processing module is arranged, the digital audio processing module comprises a digital-to-analog conversion circuit and a digital signal processor (DSP), the digital-to-analog conversion circuit converts an input digital audio signal into an analog signal, the DSP is used for performing various processing on the audio signal, such as equalization, compression, amplitude limiting, echo cancellation and the like, and the digital audio processing module is used for processing the audio signal. Therefore, sound quality is optimized, flatter frequency response is realized, and distortion is reduced.

Description

Technical Field

[0001] This utility model relates to the field of digital conference audio equipment technology, specifically a digital conference loudspeaker. Background Technology

[0002] A digital conference loudspeaker is a device that converts digital audio signals into audible sound signals and amplifies and propagates them. It primarily receives digital signals from digital conference systems (such as digital mixing consoles and digital audio interfaces), converts these digital signals into analog audio signals through an internal digital-to-analog converter (DAC) circuit. Then, the analog signals are amplified by a power amplifier circuit, and finally, the loudspeaker unit converts electrical energy into sound energy to amplify the sound.

[0003] Existing digital conference loudspeakers still have the following problems when in use: In some large conference rooms or places with complex acoustic environments, problems such as sound distortion and uneven frequency response may occur, resulting in unclear and unnatural sound. In addition, for conference rooms with irregular shapes or large areas, there may be uneven sound coverage, with some areas having weak sound, which affects the listening experience of the audience. Utility Model Content

[0004] (a) Technical problems to be solved.

[0005] To address the shortcomings of existing technologies, this invention provides a digital conference loudspeaker that solves the problems mentioned in the background section.

[0006] (ii) Technical solution.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a digital conference loudspeaker, comprising a main loudspeaker mechanism, the main loudspeaker mechanism including a main speaker enclosure, a plurality of auxiliary loudspeaker mechanisms configured outside the main speaker enclosure, each auxiliary loudspeaker mechanism including an auxiliary speaker enclosure, the main speaker enclosure and the plurality of auxiliary speakers being connected via a first audio cable, a first speaker being disposed above the front end of the main speaker enclosure, a second speaker being disposed at the front end of each auxiliary speaker enclosure, a cloth cover being fixedly installed at the front end of each auxiliary speaker enclosure and outside its second speaker, a power amplifier being fixedly connected to the middle of the rear side of the top of the main speaker enclosure, the power amplifier being connected to the main speaker enclosure via a second audio cable, an audio connector being fixedly connected to the middle of the front side of the top of the main speaker enclosure, and a digital audio processing module being connected between the audio connector and the power amplifier.

[0008] As a further improvement of this utility model, the digital audio processing module is equipped with a digital-to-analog converter circuit and a digital signal processor.

[0009] As a further improvement of this utility model: a first audio interface is provided on one side of the rear end of the audio connector, and a second audio interface is provided on the other side of the rear end of the audio connector.

[0010] As a further improvement of this utility model: a handle is fixedly connected between the two upper side walls of the main speaker, a foot pad is fixedly connected to each of the four corners of the bottom of the main speaker, the bottom of the secondary speaker is flat, and a handle is fixedly connected to the middle of the top of the secondary speaker.

[0011] As a further improvement of this utility model: an external DC power supply interface is provided at the lower center of the rear end of the main speaker, and a volume adjustment knob, a treble adjustment knob, and a bass adjustment knob are sequentially provided at the lower front end of the main speaker. The outer sides of both the main speaker and the auxiliary speaker are made of wood.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. In this utility model, a distributed sound reinforcement system structure design is adopted. In addition to a main speaker, multiple small auxiliary speakers are connected via audio lines to form a distributed sound system. The main speaker distributes the audio signal to each small auxiliary speaker, and the volume and parameters of each speaker can be flexibly adjusted to ensure the consistency of sound throughout the space. At the same time, the digital audio processing module uses beamforming algorithms in digital signal processing technology to enable the speakers to concentrate sound energy in a specific area, enhance the sound coverage of the audience area, and reduce interference to other areas. In addition, a power amplifier is set in conjunction with the digital audio processing module to amplify the converted analog audio signal to drive the speaker units to emit sound with sufficient loudness to ensure the listening effect for the audience.

[0014] 2. In this utility model, by adopting an optimized audio processing structure design, a digital audio processing module is provided, which includes a digital-to-analog converter circuit and a digital signal processor (DSP). The digital-to-analog converter circuit converts the input digital audio signal into an analog signal, and the DSP is used to perform various processing on the audio signal, such as equalization, compression, limiting, echo cancellation, etc., to optimize the sound quality, achieve a flatter frequency response, and reduce distortion. Attached Figure Description

[0015] Figure 1 This is a perspective view of the entire utility model;

[0016] Figure 2 The main speaker mechanism of this utility model is three-dimensional. Figure 1 ;

[0017] Figure 3 The main speaker mechanism of this utility model is three-dimensional. Figure 2 ;

[0018] Figure 4 This is a perspective view of the secondary loudspeaker mechanism of this utility model.

[0019] In the diagram: 1. Main speaker mechanism; 2. Secondary speaker mechanism; 3. First audio cable; 11. Main speaker enclosure; 12. External DC power supply interface; 13. Power amplifier; 14. Audio connector; 15. Digital audio processing module; 16. Handle; 17. First speaker; 18. Second audio cable; 19. First audio interface; 110. Second audio interface; 111. Foot pad; 21. Secondary speaker enclosure; 22. Secondary speaker; 23. Handle. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please see Figures 1-4In this embodiment of the present invention, a digital conference loudspeaker includes a main loudspeaker mechanism 1, which includes a main speaker box 11. Multiple auxiliary loudspeaker mechanisms 2 are configured outside the main speaker box 11, each including an auxiliary speaker box 21. The main speaker box 11 and the multiple auxiliary speakers 21 are connected via a first audio cable 3. A first speaker 17 is disposed above the front end of the main speaker box 11, and a second speaker 22 is disposed at the front end of the auxiliary speakers 21. A cloth cover is fixedly installed at the front end of the auxiliary speakers 21 and outside its second speaker 22, serving to protect the internal components of the auxiliary speakers 21 and enhance its appearance. A power amplifier 13 is fixedly connected to the middle of the rear side of the top of the main speaker box 11, and the power amplifier 13 is connected to the main speaker box 11 via a second audio cable 18. An audio connector 14 is fixedly connected to the middle of the front side of the top of the main speaker box 11, and a digital audio processing module 15 is connected between the audio connector 14 and the power amplifier 13. The overall design adopts a distributed sound reinforcement system structure, in addition to the following: A main speaker 11 connects to multiple small auxiliary speakers 21 via audio cables, forming a distributed sound system. The main speaker 11 distributes audio signals to each small auxiliary speaker 21, allowing for flexible adjustment of the volume and parameters of each speaker to ensure consistent sound throughout the space. Simultaneously, a digital audio processing module 15 utilizes beamforming algorithms from digital signal processing technology to concentrate sound energy in specific areas, enhancing sound coverage of the listener's area and reducing interference to other areas. Furthermore, a power amplifier 13 is integrated with the digital audio processing module 15 to amplify the converted analog audio signal, driving the speaker units to produce sufficiently loud sound to ensure optimal listening experience. Due to its optimized audio processing structure design, the digital audio processing module 15 includes a digital-to-analog converter circuit and a digital signal processor (DSP). The digital-to-analog converter circuit converts the input digital audio signal into an analog signal, while the DSP performs various processing operations on the audio signal, such as equalization, compression, limiting, and echo cancellation, to optimize sound quality, achieve a flatter frequency response, and reduce distortion.

[0024] The digital audio processing module 15 contains a digital-to-analog converter (DAC) circuit and a digital signal processor (DSP). The DAC circuit is responsible for converting the input digital audio signal into an analog audio signal. The accuracy and performance of the DAC chip directly affect the sound quality. A high-precision DAC chip can more accurately reproduce the details in the digital audio signal and reduce quantization noise and distortion. Its conversion rate, resolution, and other parameters determine the quality and speed of audio signal conversion. The DSP is the core component of digital audio processing. It can perform various processing on the audio signal, such as equalization (EQ) adjustment, which optimizes the frequency response of the sound by increasing or decreasing the gain of different frequency bands, making the sound clearer, fuller, or in line with the requirements of a specific acoustic environment. It can also perform dynamic range compression to prevent the audio signal peak from being too high and causing distortion, while improving the overall loudness of the sound. In addition, the DSP can also realize echo cancellation, which is very important in a conference environment, as it can reduce the impact of echoes caused by reflections in the conference room on the sound quality.

[0025] The audio connector 14 has a first audio interface 19 on one side of its rear end. This is an AES / EBU interface, mainly used for digital audio transmission between professional audio devices. It has high transmission quality and anti-interference capabilities. The audio connector 14 has a second audio interface 110 on the other side of its rear end. This is an SPDIF interface, which includes both optical and coaxial types. It is a digital audio interface widely used in both consumer and professional applications and can transmit high-quality digital audio signals.

[0026] A handle 16 is fixedly connected between the two upper side walls of the main speaker 11. A foot pad 111 is fixedly connected to each of the four corners of the bottom of the main speaker 11. The bottom of the secondary speaker 21 is flat, and a handle 23 is fixedly connected to the middle of the top of the secondary speaker 21. The handle 23 can be held to move the secondary speaker 21 conveniently, and the handle 16 can be held to move the main speaker 11 conveniently.

[0027] An external DC power supply interface 12 is located at the lower center of the rear end of the main speaker 11, which can power the entire digital conference sound reinforcement speaker through an external power supply. At the lower front end of the main speaker 11, there are volume adjustment knobs, treble adjustment knobs, and bass adjustment knobs, which can be used to adjust the sound effects of the digital conference sound reinforcement speaker. The outer sides of both the main speaker 11 and the auxiliary speaker 21 are made of wood. The wooden cabinet has good acoustic characteristics, which can reduce standing waves inside the cabinet and make the sound more natural and pure.

[0028] The working principle of this utility model is as follows: the audio connector 14 receives digital signals from a digital conference system (such as a digital mixing console, digital audio interface, etc.), converts the digital signals into analog audio signals through the digital-to-analog converter (DAC) circuit inside the digital audio processing module 15, then amplifies the analog signals through the power amplifier 13, and finally converts electrical energy into sound energy through the main speaker 11 and the auxiliary speaker 21 speaker units to amplify the sound.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A digital conference loudspeaker, comprising a main loudspeaker mechanism (1), wherein the main loudspeaker mechanism (1) includes a main speaker enclosure (11). Its features are: The main speaker (11) is provided with a plurality of secondary speaker mechanisms (2), each secondary speaker mechanism (2) including a secondary speaker (21), and the main speaker (11) and the plurality of secondary speaker (21) are connected by a first audio line (3); A first speaker (17) is provided above the front end of the main speaker (11), and a second speaker (22) is provided at the front end of the auxiliary speaker (21). A cloth cover is fixedly installed at the front end of the auxiliary speaker (21) and outside its second speaker (22). A power amplifier (13) is fixedly connected to the middle of the rear side of the top of the main speaker (11). The power amplifier (13) is connected to the main speaker (11) through a second audio line (18). An audio connector (14) is fixedly connected to the middle of the front side of the top of the main speaker (11). A digital audio processing module (15) is connected between the audio connector (14) and the power amplifier (13).

2. The digital conference loudspeaker according to claim 1, characterized in that: The digital audio processing module (15) is equipped with a digital-to-analog converter circuit and a digital signal processor.

3. A digital conference loudspeaker according to claim 1, characterized in that: The audio connector (14) has a first audio interface (19) on one side of its rear end and a second audio interface (110) on the other side of its rear end.

4. A digital conference loudspeaker according to claim 1, characterized in that: A handle (16) is fixedly connected between the two upper side walls of the main speaker (11), and a foot pad (111) is fixedly connected to each of the four corners of the bottom of the main speaker (11).

5. A digital conference loudspeaker according to claim 1, characterized in that: An external DC power supply interface (12) is provided at the lower center of the rear end of the main speaker (11).

6. A digital conference loudspeaker according to claim 1, characterized in that: The main speaker (11) has a volume control knob, a treble control knob and a bass control knob arranged sequentially at the lower front end. Both the main speaker (11) and the secondary speaker (21) have wooden cabinets on the outside.

7. A digital conference loudspeaker according to claim 1, characterized in that: The bottom of the sub-speaker (21) is flat, and a handle (23) is fixedly connected to the middle of the top of the sub-speaker (21).

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