Directional sound amplification sound box

Abstract

The invention provides a directional sound amplification sound box, relates to the technical field of sound boxes, and aims to solve the technical problems that a sound amplification sound box in the prior art is short in sound transmission distance, non-uniform in sound field coverage, poor in definition and poor in sound quality, and noise disturbs residents. The directional sound amplification sound box comprises a box body, a compression type coaxial neodymium magnetic driver used for generating middle and high pitches is arranged in the box body, the front end of the compression type coaxial neodymium magnetic driver is connected with a constant directivity horn, and the constant directivity horn comprises two opposite first side walls and two opposite second side walls. The distance between the two first side walls and the distance between the two second side walls are gradually increased from back to front, the outer walls of the two first side walls are connected with first bass loudspeakers, the inner walls of the two first side walls are provided with sound production structures, the box body is made of an anti-aging and anti-ultraviolet plastic shell, the bottom of the box body is provided with a three-channel D-type power amplifier, a network with AES67 and a DSP module, and the box body is provided with a loudspeaker. The sound box is provided with a U-shaped support, and the horizontal and vertical angles can be adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of speakers, and more specifically, to a directional sound reinforcement speaker. Background Art

[0002] Speakers are installed in schools, stadiums, and other open squares, playgrounds, and spaces for sound reinforcement. When traditional sound reinforcement speakers are used for sound reinforcement in the above scenarios, the sound transmission distance is not far enough, people in the distance cannot hear the sound clearly, the sound field coverage is uneven, the sound clarity is poor, and the overall sound quality is also poor. In addition, there are residential areas near schools and stadiums. When the speakers in outdoor stadiums are used for sound reinforcement, the sound emitted by the speakers will not only cover the stadium, but also the sound on the back of the speakers will be transmitted to the nearby residential areas at the same time, seriously affecting the daily life and rest of the residents and causing noise nuisance problems. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a directional sound reinforcement speaker to solve the technical problems of short sound transmission distance, uneven sound field coverage, poor clarity, poor sound quality, and noise nuisance of the sound reinforcement speakers in the prior art.

[0004] To solve the above technical problems, the present invention provides a directional sound reinforcement speaker, including a box body. A compression coaxial neodymium magnet driver for generating medium and high frequencies is provided inside the box body. The front end of the compression coaxial neodymium magnet driver is connected to a constant directivity horn. The constant directivity horn is circumferentially closed and includes two opposite first side walls and two opposite second side walls. The distances between the two first side walls and the distances between the two second side walls both gradually increase from back to front. First bass speakers are connected to the outer walls of the two first side walls. Sound generating structures for the first bass speakers to emit sound are provided on the inner walls of the two first side walls and at positions corresponding to the first bass speakers. The box body is made of a plastic shell that is anti-aging and anti-ultraviolet.

[0005] After adopting the above structure, the directional sound reinforcement speaker of the present invention has the following advantages: The present invention adopts a three-way frequency design. The mid-high frequency is generated by a compression coaxial neodymium magnet driver for mid-high frequency output, which has higher sensitivity and a smaller volume. The bass is generated by the first bass speaker, which has a wide frequency response range and beautiful sound quality. A constant directivity horn is provided at the front end of the compression coaxial neodymium magnet driver to control the directivity of the mid-high frequency, ensuring the concentrated propagation of sound in the specified direction, reducing the diffusion on the side or back, and at the same time making the sound transmission distance farther. Moreover, the first bass speakers are all arranged on the constant directivity horn, and the sound is sent out concentratedly through the constant directivity horn, combining the sound reinforcement effects of the mid-high frequency and the low frequency more closely, and being able to ensure a higher bass output in a compact speaker structure, having high efficiency and directivity. The sound on the front of the speaker can be better concentrated and sent in a specific direction, with slow and uniform sound attenuation, a small difference in sound pressure levels at close and far distances, enabling the sound to maintain clarity at a long distance, and being able to reduce the sound on the back of the speaker to a certain extent, reducing noise. In addition, the box body is made of an anti-aging and anti-ultraviolet plastic shell to adapt to the outdoor environment and extend the outdoor service life; the present invention can be applied to schools, stadiums, and other open squares, playgrounds, spaces and other scenarios that require directional sound transmission.

[0006] As an improvement, the two first side walls are arranged symmetrically left and right, the two second side walls are arranged symmetrically up and down, and the two first bass speakers are arranged symmetrically left and right; adopting this structure, the symmetrical arrangement can further improve the directivity and directionality of the sound.

[0007] As an improvement, the included angle α between the two first side walls ranges from 50° to 70°, and the included angle β between the two second side walls ranges from 30° to 50°; adopting this structure, the coverage angle of the speaker is limited, so as to evenly cover the sound field.

[0008] As an improvement, the included angle α between the two first side walls is 60°, and the included angle β between the two second side walls is 40°.

[0009] As an improvement, second bass speakers with DSP chip power amplifiers are connected to the rear parts of the two opposite outer side walls of the box body. The positions of the second bass speakers correspond to those of the first bass speakers. The second bass speakers cancel the low-frequency sound at the rear of the box body through DSP parameter settings; adopting this structure, the second bass speakers can cancel the low-frequency sound on the back of the speaker through DSP parameter settings, forming a cardioid pattern, thereby further reducing the noise generated on the back of the speaker and solving the problem of noise disturbing the people.

[0010] As an improvement, the horizontal cross-section of the box body is an isosceles trapezoid with the front bottom edge larger than the rear bottom edge, and the second bass speakers are connected to the left and right side walls of the box body; adopting this structure, the trapezoidal box body structure can improve the noise reduction effect of the second bass speakers on the noise on the back of the speaker, which is beneficial to forming a cardioid pattern.

[0011] As an improvement, a three-channel class-D amplifier is connected to the bottom end of the cabinet. The DSP chip is a high signal-to-noise ratio chip with an AES67 network module. The three-channel class-D amplifier is connected to the compression coaxial neodymium magnet driver, all the first bass speakers and all the second bass speakers. Parameter settings are performed through the DSP, and network connections between speakers are made through the AES67 network module. With this structure, all speakers can be centrally controlled after being connected by network cables during use.

[0012] As an improvement, a partition is provided inside the cabinet to separate the first bass speakers and the second bass speakers. With this structure, mutual interference between the first bass speakers and the second bass speakers is prevented.

[0013] As an improvement, the compression coaxial neodymium magnet driver is a high-sensitivity compression coaxial neodymium magnet driver.

[0014] As an improvement, the sound-emitting structure is a mesh opening. With this structure, it is beneficial for the emission of low-frequency sounds and does not affect mid-high frequency sounds at the same time. Description of the Drawings

[0015] Figure 1 It is a cross-sectional view of the present invention in the horizontal direction.

[0016] Figure 2 It is a schematic three-dimensional structure diagram of the present invention (without the front grille).

[0017] Figure 3 It is a cross-sectional view of the present invention in the vertical direction.

[0018] Figure 4 It is a schematic front structure diagram of the present invention.

[0019] Figure 5 It is a schematic three-dimensional structure diagram of the present invention (with the front grille).

[0020] Reference Numerals: 1, cabinet; 2, compression coaxial neodymium magnet driver; 3, constant directivity horn; 31, first side wall; 32, second side wall; 4, first bass speaker; 5, second bass speaker; 6, flange; 7, connecting groove; 8, mesh opening; 9, partition. Detailed Description of the Invention

[0021] The following provides a detailed description of the directional sound reinforcement speaker of the present invention with reference to the drawings.

[0022] As shown in Figures 1 to 5As shown in the figure, the directional loudspeaker includes a cabinet 1. Inside the cabinet 1, there is a compression coaxial neodymium magnet driver 2 for generating medium and high frequencies. The compression coaxial neodymium magnet driver 2 is a high-sensitivity compression coaxial neodymium magnet driver (3.54" midrange + 1.75" tweeter). The mid-frequency crossover point can be as low as 400 Hz, with high sensitivity and good sound clarity. The front end of the compression coaxial neodymium magnet driver 2 is connected to a constant directivity horn 3, specifically a large-sized constant directivity horn, which controls the directivity of the medium and high frequencies and at the same time makes the sound transmission distance farther.

[0023] As Figures 1 to 3 shown in the figure, the constant directivity horn 3 is closed along the circumference and includes two opposite first side walls 31 and two opposite second side walls 32. The first side walls 31 and the second side walls 32 are both continuous planes or curved surfaces. The distances between the two first side walls 31 and the distances between the two second side walls 32 both gradually increase from back to front. On the outer walls of the two first side walls 31, there are connected first bass speakers 4. On the inner walls of the two first side walls 31 and at positions corresponding to the first bass speakers 4, there are sound-generating structures for the first bass speakers 4 to emit sound. It should be noted that the outer walls and inner walls of the first side walls 31 referred to in the present invention are in terms of the constant directivity horn 3 itself, rather than the inside and outside of the cabinet 1. The first bass speakers 4 are 4*6.5-inch neodymium magnet bass speakers, and the two first side walls 31 are symmetrically arranged left and right, and the two second side walls 32 are symmetrically arranged up and down. The first side walls 31 and the second side walls 32 are distributed at intervals along the circumference. The two ends of the first side walls 31 are connected to the two second side walls 32, and the two ends of the second side walls 32 are connected to the two first side walls 31, thereby forming a circumferentially closed constant directivity horn 3. The constant directivity horn 3 is integrally formed. The two first bass speakers 4 are symmetrically arranged left and right. The first bass speakers 4 can be fixed to the constant directivity horn 3 by bolts. Among them, as Figure 4 shown in the figure, the sound-generating structure is a mesh opening 8, that is to say, the mesh opening 8 is directly opened on the two first side walls 31, which is beneficial to the emission of low-frequency sound and at the same time does not affect the medium and high-frequency sound.

[0024] As Figure 1As shown, on the rear parts of two opposite outer sidewalls of the cabinet 1, there are both second bass speakers 5 with DSP chip power amplifiers connected thereto. Among them, a three-channel class-D power amplifier is connected to the bottom end of the cabinet 1. The DSP chip is a high signal-to-noise ratio chip with an AES67 network module. The three-channel class-D power amplifier is connected to the compression coaxial neodymium magnet driver 2, all the first bass speakers 4, and all the second bass speakers 5. Through DSP for parameter setting and through the AES67 network module for network connection between speakers, all speakers can be centrally controlled after being connected by network cables, and the position of the second bass speaker 5 corresponds to that of the first bass speaker 4. It should be noted that the position of the second bass speaker 5 corresponding to that of the first bass speaker 4 means that the second bass speaker 5 is on the same side as the first bass speaker 4. For example, in this embodiment, the two first bass speakers 4 are arranged on the left and right sides of the constant directivity horn 3, then the two second bass speakers 5 are also arranged on the left and right sides of the cabinet 1. And in some other embodiments, if the two first bass speakers 4 are arranged on the upper and lower sides of the constant directivity horn 3, then the two second bass speakers 5 are correspondingly arranged on the upper and lower sides of the cabinet 1.

[0025] As Figure 1 and Figure 3 shown, both the horizontal section and the vertical section of the cabinet 1 are isosceles trapezoids with the front bottom edge larger than the rear bottom edge. The second bass speaker 5 is connected to the left and right sidewalls of the cabinet 1. The second bass speaker 5 cancels the low-frequency sound at the rear of the cabinet 1 through DSP parameter setting to form a cardioid directivity.

[0026] In addition, as Figure 1 shown, a partition 9 is provided in the cabinet 1. The partition 9 separates the first bass speaker 4 and the second bass speaker 5. Among them, the first bass speaker 4 is located on the front side of the partition 9, and the second bass speaker 5 is located on the rear side of the partition 9 to prevent interference between the first bass speaker 4 and the second bass speaker 5. The constant directivity horn 3 is also connected to the partition 9.

[0027] The number of the first bass speakers 4 and the second bass speakers 5 is not limited, but the number of the first bass speakers 4 and the second bass speakers 5 is at least two respectively and symmetrically arranged, and the number of the first bass speakers 4 and the second bass speakers 5 is the same for the convenience of DSP control.

[0028] Through the design of large size, constant directivity, and strong directivity full horn, the present invention has high efficiency and directivity. The sound on the front side of the speaker can be better concentrated and sent in a specific direction, with slow and uniform sound attenuation, and a small sound pressure level difference between near and far distances, enabling it to maintain clarity at a long distance. The speaker adopts an active three-way frequency design with a wide frequency response range and excellent sound quality.

[0029] As Figure 1 andFigure 3 As shown, the included angle α between the two first side walls 31 ranges from 50° to 70°, and the included angle β between the two second side walls 32 ranges from 30° to 50°. In this embodiment, the included angle α between the two first side walls 31 is 60°, and the included angle β between the two second side walls 32 is 40°, so that the horizontal coverage angle of the speaker is 60 degrees and the vertical coverage angle is 40 degrees, and the sound field can be evenly covered.

[0030] As Figure 3 shown, an annular flange 6 is provided on the outer side wall of the front end of the constant directivity horn 3, and an annular connection groove 7 is provided at the front end of the box body 1. The flange 6 and the side wall of the connection groove 7 are fixed by bolts.

[0031] The present invention adopts a high-power three-channel class D amplifier, 3*250W RMS, adopts a switching power supply with PFC power factor correction, and selects waterproof audio sockets, waterproof network interfaces, and waterproof power sockets to meet the outdoor use conditions. The amplifier needs to be equipped with reliable overheat protection, overload protection, DC protection, undervoltage protection, and overvoltage protection. The speaker adopts an all-weather outdoor waterproof design. The box body 1 adopts a special outdoor anti-aging and anti-ultraviolet plastic shell, which has a long service life. The specific material is the prior art. All speakers adopt a waterproof design. The box body 1 can also be provided with a special bracket, which can adjust the horizontal and vertical angles, and the speaker system is convenient and fast to install and use.

[0032] The present invention generates medium and high frequencies by a compression coaxial neodymium magnet driver 2 for medium and high frequency output, which has higher sensitivity and smaller volume. The first bass speaker 4 generates bass, with a wide frequency response range and beautiful sound quality. A constant directivity horn 3 is provided at the front end of the compression coaxial neodymium magnet driver 2 to control the directivity of medium and high frequencies, ensure the concentrated propagation of sound in the specified direction, reduce the diffusion on the side or back, and at the same time make the sound transmission distance farther. And the first bass speakers 4 are all arranged on the constant directivity horn 3, and the sound is sent out concentratedly through the constant directivity horn 3, which combines the sound reinforcement effects of medium and high frequencies and low frequencies more closely, and can ensure a higher bass output in a compact speaker structure, with high efficiency and directivity. The sound on the front of the speaker can be better concentrated and sent in a specific direction, the sound attenuation is slow and uniform, and the sound pressure level difference between near and far distances is small, so that the sound can maintain clarity at a long distance, and the sound on the back of the speaker can be reduced to a certain extent to reduce noise.

[0033] The present invention can be applied to scenarios such as schools, stadiums, and other open squares, playgrounds, spaces, etc. that require directional sound transmission. Therefore, applying the present invention to any of the above scenarios should be considered to fall within the protection scope of the present invention.

[0034] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above-described embodiments. All other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

Claims

1. A directional sound reinforcement speaker, characterized in that, It includes a box body (1), and a compression coaxial neodymium magnet driver (2) for generating medium and high frequencies is arranged inside the box body (1). The front end of the compression coaxial neodymium magnet driver (2) is connected to a constant directivity horn (3). The constant directivity horn (3) is closed along the circumferential direction and includes two opposite first side walls (31) and two opposite second side walls (32). The distances between the two first side walls (31) and the distances between the two second side walls (32) both gradually increase from back to front. First bass speakers (4) are connected to the outer walls of the two first side walls (31). Sound generating structures for the first bass speakers (4) to emit sound are arranged on the inner walls of the two first side walls (31) at positions corresponding to the first bass speakers (4). The box body (1) is made of a plastic shell that resists aging and ultraviolet rays.

2. The directional sound amplifying speaker according to claim 1, wherein The two first side walls (31) are arranged symmetrically left and right, the two second side walls (32) are arranged symmetrically up and down, and the two first bass speakers (4) are arranged symmetrically left and right.

3. The directional sound amplifying speaker according to claim 2, wherein The included angle α of the two first side walls (31) ranges from 50° to 70°, and the included angle β of the two second side walls (32) ranges from 30° to 50°.

4. The directional sound amplifying speaker according to claim 3, wherein The included angle α of the two first side walls (31) is 60°, and the included angle β of the two second side walls (32) is 40°.

5. The directional sound amplifying speaker according to claim 1, characterized in that, Second bass speakers (5) with DSP chip power amplifiers are connected to the rear parts of the two opposite outer side walls of the box body (1). The positions of the second bass speakers (5) correspond to those of the first bass speakers (4). The second bass speakers (5) cancel the low-frequency sounds at the rear of the box body (1) through DSP parameter settings.

6. The directional sound reinforcement speaker according to claim 5, wherein, The horizontal cross-section of the box body (1) is an isosceles trapezoid with the front bottom side larger than the rear bottom side, and the second bass speakers (5) are connected to the left and right side walls of the box body (1).

7. The directional sound amplifying speaker according to claim 5, characterized in that, A three-channel class-D power amplifier is connected to the bottom end of the box body (1). The DSP chip is a high signal-to-noise ratio chip with an AES67 network module. The three-channel class-D power amplifier is connected to the compression coaxial neodymium magnet driver (2), all the first bass speakers (4), and all the second bass speakers (5). Parameter settings are performed through DSP, and network connections between speakers are made through the AES67 network module.

8. The directional sound amplification speaker according to claim 5, wherein A partition (9) is arranged inside the box body (1), and the partition (9) separates the first bass speakers (4) and the second bass speakers (5).

9. The directional sound reinforcement speaker according to claim 1, wherein The compression coaxial neodymium magnet driver (2) is a high-sensitivity compression coaxial neodymium magnet driver.

10. The directional sound reinforcement speaker according to claim 1, characterized in that, The sound generating structure is a mesh opening (8).

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