Linear array phase control active sound box

Abstract

The utility model relates to the technical field of sound boxes, in particular to a linear array phase control active sound box, which comprises a controller, a posture recognition module and a plurality of loudspeakers, the axes of the loudspeakers are positioned at the same horizontal height in the up-down direction, and the axes of the loudspeakers are distributed in a fan-shaped radial manner in the left-right direction; the posture recognition module is used for detecting and recognizing whether the current loudspeaker box placement state is a vertical placement state or a horizontal placement state in real time; the controller is used for correspondingly switching a vertical placement playing sound effect or a horizontal placement playing sound effect according to an identification result of the posture identification module; according to the utility model, the radiation range can be effectively widened, the situation that petal-shaped uneven wave beams are radiated when the loudspeaker box is horizontally placed can be improved, the sound field in the radiation area is more uniform, and the loudspeaker box can present a better sound production effect no matter the loudspeaker box is vertically placed or horizontally placed.

Description

Technical fields:

[0001] This utility model relates to the field of speaker technology, and in particular to a linear array phase-controlled active speaker. Background technology:

[0002] A line array speaker is a sound system consisting of multiple speaker units arranged vertically. Although the sound waves emitted by multiple speaker units in a line array speaker are superimposed in the vertical direction, they can form a highly directional sound beam.

[0003] However, existing traditional line array speakers generally suffer from problems such as overly concentrated axial beams and small radiation range. In particular, there is a problem of combing distortion caused by mutual interference between speakers in the vertical direction of the line array. When such a line array is placed horizontally, the radiation range is even narrower and there is a petal-shaped beam, which makes the sound pressure in the sound radiation area of ​​the speaker very uneven. There is an urgent need for a phase-controlled active line array speaker that can effectively widen the radiation range and improve the uneven petal-shaped beam when placed horizontally. Utility Model Content:

[0004] The purpose of this invention is to provide a linear array phase-controlled active speaker that addresses the shortcomings of existing technologies. It can effectively broaden the radiation range, improve the uneven beam pattern of radiation in a petal shape when placed horizontally, and make the sound field in the radiation area more uniform.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a linear array phase-controlled active speaker, including a controller, an attitude recognition module, and multiple tweeters, wherein the axes of each tweeter are located at the same horizontal height in the vertical direction, and the axes of each tweeter are arranged in a fan-shaped radial distribution in the horizontal direction; the attitude recognition module is used to detect and identify in real time whether the current speaker placement state is vertical or horizontal; the controller is used to switch between vertical placement and horizontal placement to play sound effects according to the recognition result of the attitude recognition module.

[0006] A further improvement to the above scheme is that each of the tweeters has a symmetrical double-step structure with the middle at the back and the two sides at the front in the front-to-back direction.

[0007] A further improvement to the above solution is that the present invention also includes a plurality of woofers disposed behind the tweeter; each of the woofers is provided with an annular waveguide at its front end, and the annular waveguides are respectively concentrically disposed with the corresponding woofer.

[0008] A further improvement to the above scheme is that each of the tweeters is provided with a waveguide phaser at its front end. The waveguide phaser includes a central phase cone and several waveguide ring walls. The central phase cone and the various waveguide ring walls are distributed in concentric circles, with the central phase cone located at the very center.

[0009] A further improvement to the above scheme is that the front end of the central phase cone is a forward-convex conical structure, the inner side of each waveguide ring wall is a conical surface structure with a radius gradually increasing from back to front, and the outer side of the waveguide ring wall is a conical surface structure with a radius gradually decreasing from back to front; the angle between the central phase cone and the vertical plane is 30-45°, the angle between the inner side of each waveguide ring wall and the vertical plane is 50-80°, and the angle between the outer side of each waveguide ring wall and the vertical plane is 70-90°.

[0010] A further improvement to the above scheme is that a connecting rib is provided between the central phase cone and the innermost waveguide ring wall, and a connecting rib is provided between each adjacent waveguide ring wall; a mounting ear is provided on the outer side of the outermost waveguide ring wall; there are three waveguide ring walls, namely the inner waveguide ring wall, the middle waveguide ring wall, and the outer waveguide ring wall, which are arranged sequentially from the inside to the outside.

[0011] A further improvement to the above scheme is that multiple sound-permeable holes are formed on the central phase cone, the sound-permeable holes are circular holes, and each sound-permeable hole is located on the same circumference.

[0012] A further improvement to the above solution is that when the speaker is placed vertically, the controller switches to vertical placement to play sound effects and controls each tweeter to work according to preset basic parameters; when the speaker is placed horizontally, the controller switches to horizontal placement to play sound effects and controls each tweeter to add a certain delay and a certain sound pressure level based on the preset basic parameters.

[0013] A further improvement to the above solution is that when the speaker is placed horizontally and the controller is switched to horizontal placement for sound effect playback, the increased delay of each tweeter gradually increases from the center to both sides, and the increased sound pressure of each tweeter gradually increases from the center to both sides.

[0014] A further improvement to the above scheme is that there are six tweeters. When the speaker is placed horizontally and the controller is switched to horizontal placement for sound effect playback, the two tweeters in the middle increase the delay by 0.38-0.42ms and the sound pressure level by 0-0.2dB. The two tweeters on either side of the two middle tweeters increase the delay by 0.43-0.46ms and the sound pressure level by 0.3-0.7dB. The two tweeters on the outermost edges increase the delay by 0.47-0.5ms and the sound pressure level by 0.8-1.2dB.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a linear array phase-controlled active speaker, including a controller, an attitude recognition module, and multiple tweeters. The axes of each tweeter are located at the same horizontal height in the vertical direction, and the axes of each tweeter are arranged in a fan-shaped radial distribution in the horizontal direction. The attitude recognition module is used to detect and identify in real time whether the current speaker placement state is vertical or horizontal. The controller is used to switch between vertical placement and horizontal placement to play sound effects according to the recognition result of the attitude recognition module.

[0016] Compared to existing traditional line array speakers, this invention effectively widens the radiation range by arranging the axes of each tweeter in a fan-shaped radial pattern in the left-right direction. This avoids the problems of excessively concentrated axial beams and small radiation range in existing traditional line arrays. Furthermore, unlike speakers that only produce the same sound effect whether placed vertically or horizontally, horizontally placed speakers have a narrower radiation range and exhibit petal-shaped beams, resulting in uneven sound pressure across the speaker's radiation area. This invention, by pre-setting the sound effects corresponding to vertical placement and horizontal placement, effectively addresses these issues. The speaker is positioned horizontally to play corresponding sound effects. Then, by setting up a posture recognition module such as a gyroscope or level sensor module, the speaker's placement status is detected and identified in real time. The controller then switches the corresponding sound effects according to the current speaker placement status, so that the speaker can present a better sound effect whether it is placed vertically or horizontally. Even when the speaker is placed horizontally, it can effectively widen the radiation range and improve the uneven beam pattern of the radiation in the petal shape when placed horizontally. The sound field in the radiation area is more uniform, so that the speaker can be used both vertically and horizontally. Attached image description:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a structural schematic diagram from another perspective of the present invention.

[0019] Figure 3This is a schematic diagram of the structure of the tweeter and waveguide phaser of this utility model.

[0020] Figure 4 This is a schematic diagram of the waveguide phaser of this utility model.

[0021] Figure 5 This is a block diagram illustrating the control principle of this utility model.

[0022] Figure 6 This is a test graph showing the directional performance of a standard speaker at 16000Hz when placed horizontally.

[0023] Figure 7 This is a test diagram of the pointing performance of this utility model at 16000Hz when it is placed horizontally.

[0024] Figure 8 This is a test graph showing the directional performance of a standard speaker at 12500Hz when placed horizontally.

[0025] Figure 9 This is a test diagram of the directional performance of this utility model at 12500Hz when it is placed horizontally.

[0026] Figure 10 This is a test graph showing the directional performance of a standard speaker at 10000Hz when placed horizontally.

[0027] Figure 11 This is a test diagram of the directional performance of this utility model at 10000Hz when it is placed horizontally.

[0028] Figure 12 This is a test chart showing the directional performance of a standard speaker at 8000Hz when placed horizontally.

[0029] Figure 13 This is a test diagram of the directional performance of this utility model at 8000Hz when it is placed horizontally.

[0030] Figure 14 This is a test chart showing the directional performance of a standard speaker at 6300Hz when placed horizontally.

[0031] Figure 15 This is a test diagram of the directional performance of this utility model at 6300Hz when it is placed horizontally.

[0032] Figure 16 This is a test chart showing the directional performance of a standard speaker at 5000Hz when placed horizontally.

[0033] Figure 17 This is a test diagram of the directional performance of this utility model at 5000Hz when it is placed horizontally.

[0034] Figure 18 This is a test chart showing the directional performance of a standard speaker at 4000Hz when placed horizontally.

[0035] Figure 19 This is a test diagram of the directional performance of this utility model at 4000Hz when it is placed horizontally.

[0036] Figure 20 This is a test graph showing the directional performance of a standard speaker at 3150Hz when placed horizontally.

[0037] Figure 21 This is a test diagram of the directional performance of this utility model at 3150Hz when it is placed horizontally.

[0038] Figure 22 This is a test chart showing the directional performance of a standard speaker at 2500Hz when placed horizontally.

[0039] Figure 23 This is a test diagram of the directional performance of this utility model at 2500Hz when it is placed horizontally.

[0040] Figure 24 This is a test graph showing the directional performance of a standard speaker at 2000Hz when placed horizontally.

[0041] Figure 25 This is a test diagram of the directional performance of this utility model at 2000Hz when it is placed horizontally.

[0042] Explanation of reference numerals in the attached drawings: 1. Tweeter; 11. Bracket; 12. Conical drum; 2. Bass speaker; 3. Annular waveguide tube; 4. Waveguide phaser; 41. Center phase cone; 42. Waveguide ring wall; 421. Inner waveguide ring wall; 422. Middle waveguide ring wall; 423. Outer waveguide ring wall; 43. Connecting rib; 44. Mounting ear; 45. Sound transmission hole; 5. Controller; 6. Attitude recognition module. Detailed implementation method:

[0043] The present invention will be further described below with reference to the accompanying drawings, such as... Figure 1-5As shown, this utility model includes a controller 5, a posture recognition module 6, and multiple tweeters 1. The axes of each tweeter 1 are at the same horizontal level in the vertical direction, and the axes of each tweeter 1 are arranged in a fan-shaped radial distribution in the horizontal direction. The posture recognition module 6 is used to detect and identify in real time whether the speaker is placed vertically or horizontally. The controller 5 is used to switch between vertical and horizontal placement to play sound effects according to the recognition result of the posture recognition module 6. Compared with existing traditional line array speakers, this utility model, by arranging the axes of each tweeter 1 in a fan-shaped radial distribution in the horizontal direction, can effectively widen the radiation range and avoid the problems of excessively concentrated axial beams and small radiation range of existing traditional line arrays. Compared with speakers that only have the same beam regardless of whether they are placed vertically or horizontally... A sound effect is proposed to address the issue that when a speaker is placed horizontally, its radiation range is narrower and exhibits a petal-shaped beam, resulting in uneven sound pressure in the speaker's radiation area. This invention addresses this by pre-setting vertical and horizontal sound effects corresponding to both vertical and horizontal placement. A posture recognition module 6, such as a gyroscope or level sensor, is used to detect and identify the speaker's placement in real time. The controller 5 then switches the corresponding sound effect based on the speaker's current placement. This allows the speaker to deliver superior sound quality regardless of whether it is placed vertically or horizontally. Even when placed horizontally, the radiation range is effectively widened, improving the uneven, petal-shaped beam pattern and resulting in a more uniform sound field in the radiation area. This allows the speaker to be used effectively in both vertical and horizontal configurations.

[0044] Each of the tweeters 1 has a symmetrical double-step structure with the middle at the back and the two sides at the front in the front-back direction. By adjusting the front-back position of each tweeter 1 and making the high-frequency emitting apex of each tweeter 1 on a line, a linear array is formed between each tweeter 1, and the high-frequency sound propagation is in the form of cylindrical wave radiation, so that the sound attenuates less at close range and propagates further.

[0045] This utility model also includes several woofers 2 disposed behind the tweeter 1, which can cover more frequency bands of sound. In this embodiment, two woofers 2 are disposed. Each of the woofers 2 is provided with an annular waveguide 3 at its front end, and the annular waveguide 3 is concentrically disposed with the corresponding woofer 2. By adding concentrically disposed annular waveguides 3 to the front end of the woofers 2, the mid-frequency radiation efficiency can be effectively improved and the mid-frequency radiation beam can be controlled, which can reduce the diverging beam and reduce the mutual interference of each woofer 2 in the mid-range.

[0046] Each of the tweeters 1 has a waveguide phaser 4 at its front end. The waveguide phaser 4 includes a central phase cone 41 and several waveguide ring walls 42. The central phase cone 41 and the various waveguide ring walls 42 are arranged in concentric circles, with the central phase cone 41 located at the very center. By installing a waveguide phaser 4 at the front end of the tweeter 1, the high-frequency beam characteristics can be effectively controlled, the diverging beam can be reduced, and the comb distortion caused by mutual interference between the tweeters 1 can be effectively reduced.

[0047] The front end of the central phase cone 41 is a forward-convex conical structure. The inner side of each waveguide ring wall 42 is a conical surface structure with a radius that gradually increases from back to front, and the outer side of the waveguide ring wall 42 is a conical surface structure with a radius that gradually decreases from back to front, which can better form a focused reflection.

[0048] The angle between the central phase cone 41 and the vertical plane is preferably 30-45°, the angle between the inner side of each waveguide ring wall 42 and the vertical plane is preferably 50-80°, and the angle between the outer side of each waveguide ring wall 42 and the vertical plane is preferably 70-90°. This results in a better beam spread width, which can better control the beam and reduce interference problems.

[0049] A connecting rib 43 is provided between the central phase cone 41 and the innermost waveguide ring wall 42. A connecting rib 43 is also provided between each adjacent waveguide ring wall 42. This not only allows the whole unit to be connected for easy assembly, but also ensures the relative position between the central phase cone 41 and each waveguide ring wall 42, thereby better ensuring beam control. A mounting ear 44 is provided on the outer side of the outermost waveguide ring wall 42 for easy installation and fixation. The tweeter 1 includes a bracket 11 and a conical diaphragm 12. The mounting ear 44 of the waveguide phaser 4 is connected to the bracket 11 of the tweeter 1, and the waveguide phaser 4 is located in front of the conical diaphragm 12.

[0050] Preferably, there are three waveguide ring walls 42 in this invention. The three waveguide ring walls 42 are an inner waveguide ring wall 421, a middle waveguide ring wall 422, and an outer waveguide ring wall 423. The inner waveguide ring wall 421, the middle waveguide ring wall 422, and the outer waveguide ring wall 423 are arranged sequentially from the inside to the outside, which improves the overall effect.

[0051] Multiple sound-permeable holes 45 are formed on the central phase cone 41. In this embodiment, there are six sound-permeable holes 45. The sound-permeable holes 45 are circular holes, and each sound-permeable hole 45 is located on the same circumference. By setting the sound-permeable holes 45 on the central phase cone 41, the flatness of the frequency response curve of the loudspeaker at ultra-high frequency can be improved and ultra-high frequency distortion can be reduced. By adjusting the shape and position of the sound-permeable holes 45, the sound of a specific frequency can be adjusted, thereby better improving the attenuation problem of a specific frequency caused by the obstruction of the central phase cone 41.

[0052] When the speaker is placed vertically, the controller 5 switches to vertical placement for sound effect playback and controls each tweeter 1 to operate according to preset basic parameters; when the speaker is placed horizontally, the controller 5 switches to horizontal placement for sound effect playback and controls each tweeter 1 to add a certain delay and a certain sound pressure level based on the preset basic parameters.

[0053] When the speakers are placed horizontally and the controller 5 is switched to horizontal placement for sound effect playback, the increased delay of each tweeter 1 gradually increases from the center to both sides, and the increased sound pressure of each tweeter 1 gradually increases from the center to both sides.

[0054] In this embodiment, there are six tweeters 1. When the speaker is placed horizontally and the controller 5 is switched to horizontal placement for playing sound effects, the delay added by the two tweeters 1 located in the middle is preferably 0.38-0.42ms and the sound pressure added is preferably 0-0.2dB. The delay added by the two tweeters 1 located on both sides of the two middle tweeters 1 is preferably 0.43-0.46ms and the sound pressure added is preferably 0.3-0.7dB. The delay added by the two tweeters 1 located at the very edge is preferably 0.47-0.5ms and the sound pressure added is preferably 0.8-1.2dB.

[0055] In this embodiment, the tweeters 1, from left to right, are tweeter 1, tweeter 2, tweeter 3, tweeter 4, tweeter 5, and tweeter 6. When the speaker is placed horizontally and the controller 5 is switched to horizontal placement for sound effect playback, the delay and sound pressure level of each tweeter 1 are increased as shown in the table below:

[0056]

[0057]

[0058] like Figure 6-25 As shown, by comparing the directional performance test charts of existing ordinary speakers placed horizontally with those of this invention placed horizontally at various Hz, it can be seen that this invention can significantly and effectively widen the radiation range, improve the situation of uneven beam radiation in a petal shape when placed horizontally, and make the sound field in the radiation area more uniform.

[0059] Of course, the above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A linear array phase-controlled active speaker, characterized in that: The system includes a controller (5), a posture recognition module (6), and multiple tweeters (1). The axes of each tweeter (1) are at the same horizontal height in the vertical direction, and the axes of each tweeter (1) are arranged in a fan-shaped radial distribution in the horizontal direction. The posture recognition module (6) is used to detect and identify in real time whether the current speaker is placed vertically or horizontally. The controller (5) is used to switch between vertical placement and horizontal placement to play sound effects according to the recognition result of the posture recognition module (6).

2. The linear array phase-controlled active speaker according to claim 1, characterized in that: Each of the tweeters (1) has a symmetrical double-step structure with the middle at the back and the two sides at the front in the front-back direction.

3. A linear array phase-controlled active speaker according to claim 1, characterized in that: It also includes several woofers (2) located behind the tweeter (1); each of the woofers (2) has an annular waveguide (3) at its front end, and the annular waveguide (3) is concentrically arranged with the corresponding woofer (2).

4. A linear array phase-controlled active speaker according to claim 1, characterized in that: Each of the tweeters (1) is provided with a waveguide phaser (4) at its front end. The waveguide phaser (4) includes a central phase cone (41) and several waveguide ring walls (42). The central phase cone (41) and each waveguide ring wall (42) are arranged in concentric circles, with the central phase cone (41) located at the very center.

5. A linear array phase-controlled active speaker according to claim 4, characterized in that: The front end of the central phase cone (41) is a forward-convex conical structure. The inner side of each waveguide ring wall (42) is a conical surface structure with a radius that gradually increases from back to front, and the outer side of the waveguide ring wall (42) is a conical surface structure with a radius that gradually decreases from back to front. The angle between the central phase cone (41) and the vertical plane is 30-45°, the angle between the inner side of each waveguide ring wall (42) and the vertical plane is 50-80°, and the angle between the outer side of each waveguide ring wall (42) and the vertical plane is 70-90°.

6. A linear array phase-controlled active speaker according to claim 4, characterized in that: A connecting rib (43) is provided between the central phase cone (41) and the innermost waveguide ring wall (42), and a connecting rib (43) is provided between each adjacent waveguide ring wall (42); a mounting ear (44) is provided on the outer side of the outermost waveguide ring wall (42); there are three waveguide ring walls (42), namely the inner waveguide ring wall (421), the middle waveguide ring wall (422), and the outer waveguide ring wall (423), which are arranged sequentially from the inside to the outside.

7. A linear array phase-controlled active speaker according to claim 4, characterized in that: The central phase cone (41) has multiple sound-permeable holes (45) formed on it. The sound-permeable holes (45) are circular holes, and each sound-permeable hole (45) is located on the same circumference.

8. A linear array phase-controlled active speaker according to any one of claims 1-7, characterized in that: When the speaker is placed vertically, the controller (5) switches to vertical placement to play sound effects and controls each tweeter (1) to work according to the preset basic parameters; when the speaker is placed horizontally, the controller (5) switches to horizontal placement to play sound effects and controls each tweeter (1) to add a certain delay and a certain sound pressure on the basis of the preset basic parameters.

9. A linear array phase-controlled active speaker according to claim 8, characterized in that: When the speaker is placed horizontally and the controller (5) is switched to play sound effects in a horizontal position, the delay of each tweeter (1) gradually increases from the middle to both sides, and the sound pressure of each tweeter (1) gradually increases from the middle to both sides.

10. A linear array phase-controlled active speaker according to claim 9, characterized in that: There are six tweeters (1). When the speaker is placed horizontally and the controller (5) is switched to horizontal placement for playing sound effects, the two tweeters (1) in the middle increase the delay by 0.38-0.42ms and the sound pressure by 0-0.2dB. The two tweeters (1) on either side of the two middle tweeters (1) increase the delay by 0.43-0.46ms and the sound pressure by 0.3-0.7dB. The two tweeters (1) on the far side increase the delay by 0.47-0.5ms and the sound pressure by 0.8-1.2dB.

Images