Directional sound amplification sound box

Abstract

The utility model 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. A 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 is closed in the circumferential direction and 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 woofer loudspeakers, the inner walls of the two first side walls are provided with sound production structures for the first woofer loudspeakers to produce sound, and the bottom of the box body is provided with a three-channel D-type power amplifier, a network with AES67 and a DSP module. The sound box is provided with a U-shaped support, and the horizontal and vertical angles can be adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sound box technical field, specifically refers to a directional sound amplification sound box. BACKGROUND

[0002] Schools, stadiums and other open squares, playgrounds, spaces will install sound amplification sound box, the traditional sound amplification sound box in the above-mentioned scene amplifies sound, sound transmission distance is not enough far, people in the distance can not hear the sound, sound field coverage is uneven, sound clarity is poor, the overall sound quality is also poor.In addition, there will be residential areas near schools and stadiums, the sound amplification sound box of outdoor stadium, the sound emitted by the sound box will cover the stadium, the sound behind the sound box will also be transmitted to the nearby residential area, seriously affecting the daily life of residents, producing noise nuisance problem. SUMMARY

[0003] In view of the deficiency of prior art, the utility model aims at providing a directional sound amplification sound box to solve the technical problems of sound amplification sound box in prior art, such as short sound transmission distance, uneven sound field coverage, poor clarity, poor sound quality and noise nuisance.

[0004] To solve the above technical problems, the utility model provides a directional sound amplification sound box, which comprises a box body, a compression type coaxial neodymium magnetic driver for generating medium and high sound is arranged in the box body, a constant directivity horn is connected to the front end of the compression type coaxial neodymium magnetic driver, the constant directivity horn is closed along the circumference and 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 gradually increase from back to front, a first bass speaker is connected to the outer wall of the two first side walls, and a sound emitting structure for the first bass speaker to emit sound is arranged on the inner wall of the two first side walls and corresponds to the position of the first bass speaker.

[0005] With the above structure, the directional sound amplification loudspeaker has the following advantages: the utility model adopts three-way frequency design, and middle and high sound is generated by compression coaxial neodymium magnetic driver for middle and high frequency band output, which has higher sensitivity and smaller volume, and low sound is generated by the first bass speaker, and the frequency response range is wide and the sound quality is beautiful, the compression coaxial neodymium magnetic driver is provided with constant directivity horn at the front end, the directivity of the middle and high frequency is controlled, the concentration of sound in the specified direction is ensured, the diffusion on the side or back is reduced, the sound transmission distance is farther, and the first bass speaker is arranged on the constant directivity horn, sound is concentrated and sent through the constant directivity horn, the sound amplification effect of the middle and high frequency and the low frequency is more closely combined, the high output of the low sound in the compact loudspeaker structure is ensured, high efficiency and directivity are achieved, the sound on the front of the loudspeaker can be better concentrated and sent to a specific direction, sound attenuation is slow and uniform, the sound pressure level difference between the near distance and the far distance is small, the sound clarity in the far distance is maintained, and the sound on the back of the loudspeaker and the noise are reduced to a certain extent; the utility model can be applied to schools, stadiums and other open squares, playgrounds, spaces and other scenes requiring directional transmission of sound.

[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.

[0007] As an improvement, the included angle alpha of the two first side walls ranges from 50 to 70 degrees, and the included angle beta of the two second side walls ranges from 30 to 50 degrees.

[0008] As an improvement, the included angle alpha of the two first side walls is 60 degrees, and the included angle beta of the two second side walls is 40 degrees.

[0009] As an improvement, the rear part of the two opposite outer side walls of the cabinet is connected with a second bass speaker with a DSP chip power amplifier, the position of the second bass speaker corresponds to the first bass speaker, and the second bass speaker offsets the low frequency sound at the rear part of the cabinet through DSP parameter setting.

[0010] As an improvement, the horizontal section of the cabinet is an isosceles trapezoid with a front end bottom edge larger than a rear end bottom edge, and the second bass speaker is connected to the left and right side walls of the cabinet.

[0011] As improvement, the bottom end of the box body is connected with a three-channel D-class power amplifier, the DSP chip is a high signal-to-noise ratio chip with an AES67 network module, the three-channel D-class power amplifier is connected with the compression coaxial neodymium magnetic driver, all the first bass speakers and all the second bass speakers, parameter setting is carried out through the DSP, and network connection between the sound boxes is carried out through the AES67 network module; by adopting the structure, all the sound boxes can be connected through network cables and controlled centrally when in use.

[0012] As improvement, the box body is provided with a partition plate, and the partition plate separates the first bass speaker and the second bass speaker; by adopting the structure, mutual interference between the first bass speaker and the second bass speaker is prevented.

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

[0014] As improvement, the sound generating structure is a mesh opening; by adopting the structure, the low-frequency sound is beneficial to be emitted, and meanwhile, the middle and high-frequency sound is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a sectional view in the horizontal direction of the utility model.

[0016] Figure 2 is a three-dimensional structure schematic view of the utility model (without the front end mesh cover).

[0017] Figure 3 is a sectional view in the vertical direction of the utility model.

[0018] Figure 4 is a structure schematic view of the front end of the utility model.

[0019] Figure 5 is a three-dimensional structure schematic view of the utility model (with the front end mesh cover).

[0020] Signs: 1, box body; 2, compression coaxial neodymium magnetic 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 plate. DETAILED DESCRIPTION

[0021] The directional sound expansion loudspeaker of the utility model will be described in detail below in combination with the drawings.

[0022] As improvement, the bottom end of the box body is connected with a three-channel D-class power amplifier, the DSP chip is a high signal-to-noise ratio chip with an AES67 network module, the three-channel D-class power amplifier is connected with the compression coaxial neodymium magnetic driver, all the first bass speakers and all the second bass speakers, parameter setting is carried out through the DSP, and network connection between the sound boxes is carried out through the AES67 network module; by adopting the structure, all the sound boxes can be connected through network cables and controlled centrally when in use. Figures 1 to 5As shown in the figure, a directional sound expansion loudspeaker comprises a cabinet 1, a compression coaxial neodymium magnetic driver 2 for generating medium and high sound is arranged in the cabinet 1, the compression coaxial neodymium magnetic driver 2 is a high-sensitivity compression coaxial neodymium magnetic driver (3.54" medium tone + 1.75" high tone), the medium frequency frequency division point can be as low as 400Hz, the sensitivity is high, the sound clarity is good, the compression coaxial neodymium magnetic driver 2 is connected with a constant directivity horn 3 at the front end, specifically a large-size constant directivity horn, the directivity of the medium and high frequency is controlled, and the sound transmission distance is further.

[0023] As Figures 1 to 3 shown, the constant directivity horn 3 is circumferentially closed and comprises two opposite first side walls 31 and two opposite second side walls 32, the first side wall 31 and the second side wall 32 are both continuous planes or curved surfaces, the distance between the two first side walls 31 and the distance between the two second side walls 32 gradually increase from back to front, the outer wall of the two first side walls 31 is connected with a first bass speaker 4, and the inner wall of the two first side walls 31 is provided with a sound emitting structure corresponding to the position of the first bass speaker 4 for emitting sound of the first bass speaker 4, it should be noted that the outer wall and the inner wall of the first side wall 31 in the utility model are referred to the constant directivity horn 3 itself, not the inside and outside of the cabinet 1; the first bass speaker 4 is a 4*6.5-inch neodymium magnetic bass speaker, and the two first side walls 31 are symmetrically arranged left and right, the two second side walls 32 are symmetrically arranged up and down, the first side wall 31 and the second side wall 32 are distributed at intervals in the circumferential direction, the two ends of the first side wall 31 are connected with the two second side walls 32, and the two ends of the second side wall 32 are connected with the two first side walls 31, so as to form the 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, and the first bass speaker 4 can be fixed with the constant directivity horn 3 through bolts, wherein, as Figure 4 shown, the sound emitting structure is a mesh opening 8, that is, the mesh opening 8 is directly arranged on the two first side walls 31, which is beneficial to the emission of low-frequency sound and does not affect the sound of medium and high frequency.

[0024] As Figure 1As shown, the rear of the two opposite outer side walls of the cabinet 1 is connected with the second bass speaker 5 with DSP chip power amplifier, wherein the bottom end of the cabinet 1 is connected with a three-channel D-class power amplifier, the DSP chip is a high signal-to-noise ratio chip with an AES67 network module, the three-channel D-class power amplifier is connected with the compression coaxial neodymium magnetic driver 2, all the first bass speakers 4 and all the second bass speakers 5, the parameters are set through the DSP, the network connection between the sound boxes is realized through the AES67 network module, all the sound boxes can be connected through the network cable and controlled centrally, and the positions of the second bass speakers 5 correspond to the positions of the first bass speakers 4. It should be noted that the positions of the second bass speakers 5 correspond to the positions of the first bass speakers 4, that is, the second bass speakers 5 are on the same side as the first bass speakers 4, for example, in the embodiment, the two first bass speakers 4 are arranged on the left and right sides of the constant directivity horn 3, and 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, the two second bass speakers 5 are correspondingly arranged on the upper and lower sides of the cabinet 1.

[0025] As shown in Figure 1 and Figure 3 The horizontal cross section and the vertical cross section of the cabinet 1 are isosceles trapezoids with the front end bottom edge being larger than the rear end bottom edge, the second bass speakers 5 are connected on the left and right side walls of the cabinet 1, and the second bass speakers 5 offset the low-frequency sound at the rear of the cabinet 1 through the DSP parameter setting to form a heart-shaped directivity.

[0026] In addition, as shown in Figure 1 The cabinet 1 is provided with a partition plate 9, the partition plate 9 separates the first bass speakers 4 and the second bass speakers 5, wherein the first bass speakers 4 are located on the front side of the partition plate 9, the second bass speakers 5 are located on the rear side of the partition plate 9, the mutual interference between the first bass speakers 4 and the second bass speakers 5 is prevented, and the constant directivity horn 3 is also connected with the partition plate 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 and symmetrically arranged, and the number of the first bass speakers 4 and the second bass speakers 5 is consistent to facilitate the DSP control.

[0028] The utility model discloses a large size, constant directivity, strong directivity full horn design, with high efficiency and directivity, the sound box front sound can better concentrate and send to specific direction, sound attenuation is slow and uniform, near distance and far distance sound pressure level difference is small, makes it keep the intelligibility on the far distance. The sound box adopts active three-way frequency division design, the frequency response range is wide, and the sound quality is beautiful.

[0029] As shown in Figure 1 andFigure 3 As shown, the two first side walls 31 have an included angle alpha ranging from 50 to 70 degrees, and the two second side walls 32 have an included angle beta ranging from 30 to 50 degrees; in this embodiment, the two first side walls 31 have an included angle alpha of 60 degrees, and the two second side walls 32 have an included angle beta of 40 degrees, so that the loudspeaker covers an angle of 60 degrees horizontally and 40 degrees vertically, and can uniformly cover the sound field.

[0030] As shown, Figure 3 A ring-shaped flange 6 is arranged on the outer side wall of the front end of the constant directivity horn 3, and a ring-shaped connecting groove 7 is arranged on the front end of the cabinet 1, and the side walls of the flange 6 and the connecting groove 7 are fixed by bolts.

[0031] The utility model discloses a high -power three -way class D power amplifier, 3*250W RMS adopts the waterproof audio socket, waterproof network interface, waterproof power socket to satisfy the outdoor use condition, and the power amplifier needs to have reliable overheat protection, overload protection, DC protection, under -voltage protection, overvoltage protection, and the cabinet 1 uses the outdoor special anti -aging, anti -ultraviolet plastic shell, and the service life is long, and the specific material is prior art. All loudspeakers adopt waterproof design, and the cabinet 1 can also be provided with a special support, and the horizontal and vertical angles can be adjusted, and the loudspeaker system is convenient and quick to install and use.

[0032] The utility model discloses a high -power three -way class D power amplifier, 3*250W RMS adopts the waterproof audio socket, waterproof network interface, waterproof power socket to satisfy the outdoor use condition, and the power amplifier needs to have reliable overheat protection, overload protection, DC protection, under -voltage protection, overvoltage protection, and the cabinet 1 uses the outdoor special anti -aging, anti -ultraviolet plastic shell, and the service life is long, and the specific material is prior art. All loudspeakers adopt waterproof design, and the cabinet 1 can also be provided with a special support, and the horizontal and vertical angles can be adjusted, and the loudspeaker system is convenient and quick to install and use.

[0033] The utility model discloses a high -power three -way class D power amplifier, 3*250W RMS adopts the waterproof audio socket, waterproof network interface, waterproof power socket to satisfy the outdoor use condition, and the power amplifier needs to have reliable overheat protection, overload protection, DC protection, under -voltage protection, overvoltage protection, and the cabinet 1 uses the outdoor special anti -aging, anti -ultraviolet plastic shell, and the service life is long, and the specific material is prior art. All loudspeakers adopt waterproof design, and the cabinet 1 can also be provided with a special support, and the horizontal and vertical angles can be adjusted, and the loudspeaker system is convenient and quick to install and use.

[0034] The embodiment of the utility model is explained in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned one embodiment, all other embodiments obtained by the person skilled in the art without making the creative labor belong to the range of the utility model protection.

Claims

1. A directional sound expansion speaker, characterized in that, The utility model relates to a cabinet (1) is equipped with the compression type coaxial neodymium magnetic driver (2) for producing medium high sound in the cabinet (1), the compression type coaxial neodymium magnetic driver (2) front end is connected constant directivity horn (3), the constant directivity horn (3) is closed along the circumference and includes two opposite first side wall (31) and two opposite second side wall (32), two the first side wall (31) interval and two the second side wall (32) interval gradually increase from back to front, two the first side wall (31) on the outer wall are connected with first bass speaker (4), two the first side wall (31) on the inner wall and the position corresponding first bass speaker (4) are equipped with the sound structure for the first bass speaker (4) and sound.

2. The directional sound expansion speaker of claim 1, wherein, Two the first side wall (31) are left and right symmetrical arrangement, two the second side wall (32) are up and down symmetrical arrangement, two the first bass speaker (4) are left and right symmetrical arrangement.

3. The directional sound expansion speaker of claim 2, wherein, Two the first side wall (31) included angle alpha range is 50-70 DEG, two the second side wall (32) included angle beta range is 30-50 DEG.

4. The directional sound expansion speaker of claim 3, wherein, Two the first side wall (31) included angle alpha is 60 DEG, two the second side wall (32) included angle beta is 40 DEG.

5. The directional sound expansion speaker of claim 1, wherein, The rear portion of two opposite outer side walls of the cabinet (1) is connected with the second bass speaker (5) with the DSP chip power amplifier, the position of the second bass speaker (5) corresponds to the first bass speaker (4), the second bass speaker (5) offsets the low frequency sound of the rear portion of the cabinet (1) through the DSP parameter setting.

6. The directional sound expansion speaker of claim 5, wherein, The horizontal section of the cabinet (1) is isosceles trapezoidal with the front end bottom edge being greater than the rear end bottom edge, and the second bass speaker (5) is connected to the left and right side walls of the cabinet (1).

7. The directional sound expansion speaker of claim 5, wherein, The bottom end of the cabinet (1) is connected with a three-channel class-D power amplifier, 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 type coaxial neodymium magnetic driver (2), all the first bass speakers (4), and all the second bass speakers (5), and the network connection between the sound boxes is realized through the DSP parameter setting and the AES67 network module.

8. The directional sound expansion speaker of claim 5, wherein, The cabinet (1) is provided with a partition plate (9) therein, and the partition plate (9) separates the first bass speakers (4) and the second bass speakers (5).

9. The directional sound expansion speaker of claim 1, wherein, The compression type coaxial neodymium magnetic driver (2) is a high-sensitivity compression type coaxial neodymium magnetic driver.

10. The directional sound expansion speaker of claim 1, wherein, The sound structure is a meshed opening (8).

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