Linear array phase control active sound box

Abstract

The invention 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 located at the same horizontal height in the up-down direction, and the axes of the loudspeakers are distributed in a fan-shaped radial mode 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 invention, the radiation range can be effectively broadened, the situation that petal-shaped non-uniform wave beams are radiated when the sound box is horizontally placed can be improved, the sound field in the radiation area is more uniform, and the sound box can present a better sound production effect no matter the sound box is vertically placed or horizontally placed.

Description

Technical field:

[0001] The present invention relates to the technical field of sound boxes, and in particular to a line array phase-controlled active sound box. Background technology:

[0002] Line Array Speaker is a sound system composed of multiple speaker units arranged vertically. Although the sound waves emitted by the line array speaker are superimposed in the vertical direction, it can form a sound beam with strong directivity;

[0003] However, existing traditional line array speakers generally have the problem that the axial beam of the line array is too concentrated and the radiation range is small. 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 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 line array phase-controlled active speaker that can effectively widen the radiation range and improve the situation of the petal-shaped uneven beam when radiated when placed horizontally. Summary of the invention:

[0004] The purpose of the present invention is to provide a line array phase-controlled active speaker to address the deficiencies in the prior art, which can effectively broaden the radiation range, improve the situation where the radiation presents a petal-shaped uneven beam when placed horizontally, and make the sound field in the radiation area more uniform.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a linear array phase-controlled active speaker, including a controller, a posture recognition module, and multiple tweeters, the axes of each tweeter are located at the same horizontal height in the up and down directions, and the axes of each tweeter are distributed in a fan-shaped radial shape in the left and right directions; the posture recognition module is used to detect and identify in real time whether the current speaker placement state is a vertical placement state or a horizontal placement state; the controller is used to switch to vertical placement to play sound effects or horizontal placement to play sound effects according to the recognition result of the posture recognition module.

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

[0007] A further improvement to the above scheme is that the present invention also includes a plurality of woofers arranged behind the tweeter; a front end of each of the woofers is provided with an annular waveguide tube, and the annular waveguide tube is concentrically arranged with the corresponding woofer.

[0008] A further improvement to the above solution is that waveguide phase shifters are respectively provided at the front ends of the high - pitch speakers. The waveguide phase shifter includes a central phase cone and several waveguide ring walls. The central phase cone and each waveguide ring wall are concentrically distributed, and the central phase cone is located at the middle position.

[0009] A further improvement to the above solution is that the front end of the central phase cone is a conical structure protruding forward. The inner side of each waveguide ring wall is a conical surface structure with a radius gradually increasing from the rear to the front, and the outer side of the waveguide ring wall is a conical surface structure with a radius gradually decreasing from the rear to the 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 solution is that connecting ribs are provided between the central phase cone and the innermost waveguide ring wall, and connecting ribs are respectively provided between each adjacent waveguide ring wall. An installation ear is provided on the outer side of the outermost waveguide ring wall. There are three waveguide ring walls, which are the inner waveguide ring wall, the middle waveguide ring wall, and the outer waveguide ring wall, and the inner waveguide ring wall, the middle waveguide ring wall, and the outer waveguide ring wall are arranged in sequence from the inside to the outside.

[0011] A further improvement to the above solution is that a plurality of sound - transmitting holes are formed on the central phase cone. The sound - transmitting holes are circular holes, and each sound - transmitting hole is located on the same circumference.

[0012] A further improvement to the above solution is that when the speaker is in the vertical placement state, the controller switches to the vertical placement playback sound effect and respectively controls each high - pitch speaker to work according to the preset basic parameters. When the speaker is in the horizontal placement state, the controller switches to the horizontal placement playback sound effect and respectively controls each high - pitch speaker to increase a certain delay and a certain sound pressure on the basis of the preset basic parameters.

[0013] A further improvement to the above solution is that when the speaker is in the horizontal placement state and the controller switches to the horizontal placement playback sound effect, the delay increased by each high - pitch speaker gradually increases from the middle to both sides, and the sound pressure increased by each high - pitch speaker gradually increases from the middle to both sides.

[0014] A further improvement to the above solution is that there are six high - pitched speakers. When the speaker is in a horizontal placement state and the controller switches to the horizontal placement playback sound effect, the additional delay of the two middle high - pitched speakers is 0.38 - 0.42 ms, and the additional sound pressure is 0 - 0.2 dB. The additional delay of the two high - pitched speakers on both sides of the two middle high - pitched speakers is 0.43 - 0.46 ms, and the additional sound pressure is 0.3 - 0.7 dB. The additional delay of the two high - pitched speakers on the outermost sides is 0.47 - 0.5 ms, and the additional sound pressure is 0.8 - 1.2 dB.

[0015] The beneficial effects of the present invention are as follows: An active line - array phase - controlled speaker provided by the present invention includes a controller, an attitude recognition module, and multiple high - pitched speakers. The axes of each of the high - pitched speakers are at the same horizontal height in the up - down direction, and the axes of each of the high - pitched speakers are radially distributed in a fan - shaped manner in the left - right direction; the attitude recognition module is used to detect and recognize in real time whether the current placement state of the speaker is a vertical placement state or a horizontal placement state; the controller is used to switch the vertical placement playback sound effect or the horizontal placement playback sound effect accordingly according to the recognition result of the attitude recognition module.

[0016] Compared with the existing traditional line - array speakers, by radially distributing the axes of each high - pitched speaker in a fan - shaped manner in the left - right direction, the present invention can effectively broaden the radiation range and avoid the problems of overly concentrated axial beams and small radiation range of the existing traditional line - array speakers. Compared with the situation where the speaker has only the same playback sound effect whether it is vertically placed or horizontally placed, when the speaker is horizontally placed, the radiation range is narrower and there are petal - shaped beams, resulting in very uneven sound pressure in the sound radiation area of the speaker. By presetting the vertical placement playback sound effect corresponding to the vertical placement state and the horizontal placement playback sound effect corresponding to the horizontal placement state, and then setting an attitude recognition module such as a gyroscope or a level sensor module to detect and recognize the placement state of the speaker in real time and enabling the controller to switch the corresponding playback sound effect according to the current placement state of the speaker, the present invention can enable the speaker to present a better sound - emitting effect whether it is vertically placed or horizontally placed. Even when the speaker is horizontally placed, it can effectively broaden the radiation range, improve the situation of uneven petal - shaped radiation when horizontally placed, and make the sound field in the radiation area more uniform, so that the speaker can be used both vertically and horizontally better. Description of the Drawings:

[0017] Figure 1 It is a structural schematic diagram of the present invention.

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

[0019] Figure 3Schematic diagram of the structure of the high - pitch loudspeaker and waveguide phaser of the present invention.

[0020] Figure 4 Schematic diagram of the structure of the waveguide phaser of the present invention.

[0021] Figure 5 Block diagram of the control principle of the present invention.

[0022] Figure 6 Test chart of the directivity performance at 16000 Hz when an existing ordinary speaker is placed horizontally.

[0023] Figure 7 Test chart of the directivity performance at 16000 Hz when the present invention is placed horizontally.

[0024] Figure 8 Test chart of the directivity performance at 12500 Hz when an existing ordinary speaker is placed horizontally.

[0025] Figure 9 Test chart of the directivity performance at 12500 Hz when the present invention is placed horizontally.

[0026] Figure 10 Test chart of the directivity performance at 10000 Hz when an existing ordinary speaker is placed horizontally.

[0027] Figure 11 Test chart of the directivity performance at 10000 Hz when the present invention is placed horizontally.

[0028] Figure 12 Test chart of the directivity performance at 8000 Hz when an existing ordinary speaker is placed horizontally.

[0029] Figure 13 Test chart of the directivity performance at 8000 Hz when the present invention is placed horizontally.

[0030] Figure 14 Test chart of the directivity performance at 6300 Hz when an existing ordinary speaker is placed horizontally.

[0031] Figure 15 Test chart of the directivity performance at 6300 Hz when the present invention is placed horizontally.

[0032] Figure 16 Test chart of the directivity performance at 5000 Hz when an existing ordinary speaker is placed horizontally.

[0033] Figure 17 Test chart of the directivity performance at 5000 Hz when the present invention is placed horizontally.

[0034] Figure 18 Test chart of the directivity performance at 4000 Hz when an existing ordinary speaker is placed horizontally.

[0035] Figure 19 This is the directivity performance test chart of the present invention at 4000 Hz when placed horizontally.

[0036] Figure 20 This is the directivity performance test chart of an existing ordinary speaker at 3150 Hz when placed horizontally.

[0037] Figure 21 This is the directivity performance test chart of the present invention at 3150 Hz when placed horizontally.

[0038] Figure 22 This is the directivity performance test chart of an existing ordinary speaker at 2500 Hz when placed horizontally.

[0039] Figure 23 This is the directivity performance test chart of the present invention at 2500 Hz when placed horizontally.

[0040] Figure 24 This is the directivity performance test chart of an existing ordinary speaker at 2000 Hz when placed horizontally.

[0041] Figure 25 This is the directivity performance test chart of the present invention at 2000 Hz when placed horizontally.

[0042] Explanation of reference numerals in the drawings: Tweeter 1, bracket 11, conical drum paper 12, woofer 2, annular waveguide tube 3, waveguide phaser 4, central phase cone 41, waveguide ring wall 42, inner waveguide ring wall 421, intermediate waveguide ring wall 422, outer waveguide ring wall 423, connecting rib 43, mounting ear 44, sound transmission hole 45, controller 5, attitude recognition module 6. Detailed implementation manners:

[0043] The present invention will be further described below in conjunction with the accompanying drawings, as Figures 1-5As shown in the figure, the present invention includes a controller 5, an attitude recognition module 6, and a plurality of high - pitched speakers 1. The axes of each of the high - pitched speakers 1 are located at the same horizontal height in the up - down direction, and the axes of each of the high - pitched speakers 1 are arranged in a fan - shaped radiation pattern in the left - right direction; the attitude recognition module 6 is used to detect and recognize in real time whether the current speaker placement state is a vertical placement state or a horizontal placement state; the controller 5 is used to correspondingly switch the vertical placement playback sound effect or the horizontal placement playback sound effect according to the recognition result of the attitude recognition module 6. Compared with the existing traditional line - array speakers, by arranging the axes of each of the high - pitched speakers 1 in a fan - shaped radiation pattern in the left - right direction, the present invention can effectively broaden the radiation range and avoid the problems of overly concentrated axial beam and small radiation range of the existing traditional line - array speakers. Compared with the situation where the speaker has only the same playback sound effect whether it is placed vertically or horizontally, when the speaker is placed horizontally, the radiation range is narrower and there are petal - shaped beams, resulting in very uneven sound pressure in the sound radiation area of the speaker. By presetting the vertical placement playback sound effect corresponding to the vertical placement state and the horizontal placement playback sound effect corresponding to the horizontal placement state, and then setting the attitude recognition module 6, such as sensor modules like gyroscopes or spirit levels, to detect and recognize the speaker placement state in real time and enabling the controller 5 to switch the corresponding playback sound effect according to the current speaker placement state, the present invention can enable the speaker to present a better sound - emitting effect whether it is placed vertically or horizontally. Even when the speaker is placed horizontally, it can effectively broaden the radiation range, improve the situation of uneven petal - shaped radiation beams when placed horizontally, and make the sound field in the radiation area more uniform, so that the speaker can be used both vertically and horizontally better.

[0044] Each of the high - pitched speakers 1 has a symmetric double - stepped structure with the middle part at the back and both sides at the front in the front - back direction; by adjusting the front - back positions of each of the high - pitched speakers 1 and making the high - pitched sound emission vertices of each of the high - pitched speakers 1 on the same line, a linear array is formed between each of the high - pitched speakers 1, and the high - pitched sound emission propagates in a cylindrical - wave radiation mode, so that the sound has less attenuation at close range and can be transmitted over a longer distance.

[0045] The present invention further includes a plurality of bass speakers 2 arranged behind the high - pitched speakers 1, which can cover sounds in more frequency bands. In this embodiment, two bass speakers 2 are provided; a ring - shaped waveguide tube 3 is respectively provided at the front end of each of the bass speakers 2, and the ring - shaped waveguide tubes 3 are concentrically arranged with the corresponding bass speakers 2 respectively; by installing the ring - shaped waveguide tubes 3 concentrically at the front end of the bass speakers 2, the mid - frequency radiation efficiency can be effectively improved and the mid - frequency radiation beam can be controlled, the divergent beam can be reduced, and the mutual interference of each of the bass speakers 2 in the mid - frequency region can be reduced.

[0046] A waveguide phaser 4 is respectively provided at the front end of each tweeter 1. The waveguide phaser 4 includes a central phase cone 41 and a plurality of waveguide ring walls 42. The central phase cone 41 and each waveguide ring wall 42 are concentrically distributed, and the central phase cone 41 is located at the middle position. By installing the waveguide phaser 4 at the front end of the tweeter 1, the high-frequency beam characteristics can be effectively controlled, the divergent beam can be reduced, and the comb distortion caused by the mutual interference between the tweeters 1 can be effectively reduced.

[0047] The front end of the central phase cone 41 is a conical structure protruding forward. The inner side of each waveguide ring wall 42 is a conical surface structure with a gradually increasing radius from the rear to the front, and the outer side of the waveguide ring wall 42 is a conical surface structure with a gradually decreasing radius from the rear to the front, which can better form a beam reflection.

[0048] The included angle between the central phase cone 41 and the vertical plane is preferably 30 - 45°. The included angle between the inner side of each waveguide ring wall 42 and the vertical plane is preferably 50 - 80°. The included angle between the outer side of each waveguide ring wall 42 and the vertical plane is preferably 70 - 90°. The diffusion width of the beam is better, and the beam can be better controlled and the interference problem can be reduced.

[0049] A connecting rib 43 is provided between the central phase cone 41 and the innermost waveguide ring wall 42. Connecting ribs 43 are respectively provided between each adjacent waveguide ring wall 42. Not only can the whole be connected as a whole for easy assembly, but also the relative positions between the central phase cone 41 and each waveguide ring wall 42 can be well guaranteed, so that the beam control can be better guaranteed. An installation ear 44 is provided on the outer side of the outermost waveguide ring wall 42. It is convenient to install and fix through the installation ear 44. The tweeter 1 includes a bracket 11 and a conical drum paper 12. The installation ear 44 of the waveguide phaser 4 is connected to the bracket 11 of the tweeter 1, and the waveguide phaser 4 is arranged in front of the conical drum paper 12.

[0050] Preferably, there are three waveguide ring walls 42 in the present invention. The three waveguide ring walls 42 are respectively 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 in sequence from the inside to the outside, and the overall effect is better.

[0051] A plurality of sound transmission holes 45 are formed on the central phase cone 41. There are six sound transmission holes 45 in this embodiment. The sound transmission holes 45 are circular holes. Each sound transmission hole 45 is located on the same circumference. By providing the sound transmission holes 45 on the central phase cone 41, the flatness of the frequency response curve of the ultra-high frequency of the speaker can be improved and the ultra-high frequency distortion can be reduced. By adjusting the shape, position, etc. of the sound transmission holes 45, the sound of a specific frequency passing through can be adjusted, so as to better improve the attenuation problem caused by the occlusion of the central phase cone 41 for a specific frequency.

[0052] When the speaker is in the vertical placement state, the controller 5 switches to play the sound effect in the vertical placement and controls each high-frequency speaker 1 to work according to the preset basic parameters respectively; when the speaker is in the horizontal placement state, the controller 5 switches to play the sound effect in the horizontal placement and controls each high-frequency speaker 1 to increase a certain delay and a certain sound pressure on the basis of the preset basic parameters.

[0053] When the speaker is in the horizontal placement state and the controller 5 switches to play the sound effect in the horizontal placement, the delay increased by each high-frequency speaker 1 gradually increases from the middle to both sides, and the sound pressure increased by each high-frequency speaker 1 gradually increases from the middle to both sides.

[0054] There are six high-frequency speakers 1 in this embodiment. When the speaker is in the horizontal placement state and the controller 5 switches to play the sound effect in the horizontal placement, the preferably increased delay of the two high-frequency speakers 1 in the middle is 0.38 - 0.42 ms, and the preferably increased sound pressure is 0 - 0.2 dB. The preferably increased delay of the two high-frequency speakers 1 on both sides of the two high-frequency speakers 1 in the middle is 0.43 - 0.46 ms, and the preferably increased sound pressure is 0.3 - 0.7 dB. The preferably increased delay of the two high-frequency speakers 1 on the outermost sides is 0.47 - 0.5 ms, and the preferably increased sound pressure is 0.8 - 1.2 dB;

[0055] The high-frequency speakers 1 in this embodiment are the first high-frequency speaker 1, the second high-frequency speaker 1, the third high-frequency speaker 1, the fourth high-frequency speaker 1, the fifth high-frequency speaker 1, and the sixth high-frequency speaker 1 in sequence from left to right. When the speaker is in the horizontal placement state and the controller 5 switches to play the sound effect in the horizontal placement, the increased delay and increased sound pressure of each high-frequency speaker 1 are as shown in the following table:

[0056]

[0057]

[0058] As Figures 6-25 shown, by comparing the directivity performance test diagrams at various Hz when the existing ordinary speaker is in the horizontal placement and when the present invention is in the horizontal placement, it can be seen that the present invention can significantly and effectively broaden the radiation range, can improve the situation that the radiation presents a non-uniform petal-shaped beam when in the horizontal placement, and the sound field in the radiation area is more uniform.

[0059] Certainly, the above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made according to the structures, features, and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. A line array phase control active speaker, characterized in that: The invention comprises a controller (5), a posture recognition module (6), and a plurality of tweeters (1), wherein the axes of the tweeters (1) are located at the same horizontal height in the vertical direction, and the axes of the tweeters (1) are arranged in a fan-shaped radial distribution in the left-right direction; the posture recognition module (6) is used for real-time detection and recognition of whether the current speaker placement state is a vertical placement state or a horizontal placement state; and the controller (5) is used for correspondingly switching between vertical placement and horizontal placement for playing sound effects according to the recognition result of the posture recognition module (6).

2. A line array phase control active speaker according to claim 1, characterized in that: Each of the tweeters (1) presents a symmetrical double-step structure in the front-to-back direction, with the middle at the back and both sides at the front.

3. The line array phase control active speaker according to claim 1, characterized in that: It also includes a plurality of woofers (2) arranged behind the tweeter (1); a front end of each of the woofers (2) is provided with an annular waveguide tube (3), and the annular waveguide tube (3) is arranged concentrically with the corresponding woofer (2).

4. The line array phase control active speaker according to claim 1, characterized in that: A waveguide phase shifter (4) is provided at the front end of each tweeter (1), the waveguide phase shifter (4) comprising a central phase cone (41) and a plurality of waveguide ring walls (42), the central phase cone (41) and the waveguide ring walls (42) being arranged in concentric circles, with the central phase cone (41) being located at the exact middle position.

5. The line array phase control active speaker according to claim 4, characterized in that: The front end of the central phase cone (41) is a conical structure protruding forward, the inner side of each waveguide ring wall (42) is a conical surface structure with a radius gradually increasing from back to front, and the outer side of the waveguide ring wall (42) is a conical surface structure with a radius gradually decreasing 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. The line array phase control active speaker according to claim 4, characterized in that: A connecting rib (43) is provided between the central phase cone (41) and the waveguide ring wall (42) located at the innermost side, 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 waveguide ring wall (42) located at the outermost side; there are three waveguide ring walls (42), and the three waveguide ring walls (42) are respectively an inner waveguide ring wall (421), an intermediate waveguide ring wall (422), and an outer waveguide ring wall (423); the inner waveguide ring wall (421), the intermediate waveguide ring wall (422), and the outer waveguide ring wall (423) are arranged in sequence from the inside to the outside.

7. The line array phase control active speaker according to claim 4, characterized in that: A plurality of sound-transmitting holes (45) are formed on the central phase cone (41), the sound-transmitting holes (45) are circular holes, and each of the sound-transmitting holes (45) is located on the same circumference.

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

9. The line array phase control active speaker according to claim 8, characterized in that: When the sound box is in a horizontal placement state and the controller (5) is switched to a horizontal placement to play sound effects, the delay added by each tweeter (1) gradually increases from the middle to the sides, and the sound pressure added by each tweeter (1) gradually increases from the middle to the sides.

10. The line array phase control active speaker according to claim 9, characterized in that: There are six tweeters (1). When the sound box is in a horizontal placement state and the controller (5) is switched to a horizontal placement state to play sound effects, the two tweeters (1) located in the middle have an increased delay of 0.38-0.42 ms and an increased sound pressure of 0-0.2 dB, the two tweeters (1) located on both sides of the two tweeters (1) in the middle have an increased delay of 0.43-0.46 ms and an increased sound pressure of 0.3-0.7 dB, and the two tweeters (1) located at the outermost sides have an increased delay of 0.47-0.5 ms and an increased sound pressure of 0.8-1.2 dB.

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