Three-frequency-division linear array sound box

Abstract

The utility model provides a three-frequency-division linear array sound box, which comprises a box body. The left and right ends of the box body are symmetrically provided with bass cavities. A plurality of alto cavities are obliquely and symmetrically arranged between the bass cavities; a plurality of high-pitch cavities are formed in the middle of the box body and located on the central axis of the middle-pitch cavities which are symmetrically arranged left and right; the bass cavity is provided with a bass assembly. Each alto cavity is provided with an alto assembly; the high-pitch cavity is provided with a high-pitch compression assembly. The high-pitch compression assembly is connected with the alto cavity through the high-pitch horn. According to the utility model, the bass adopts a direct injection mode, and the alto is below the high-pitch diffusion plate, so that the horizontal distance of the alto and the distance between the bass are effectively reduced, the accurate coverage angle of the sound box is realized, and the sound amplification definition is ensured; the interference of the wavefronts at the outlets of the two compression cavities adopts a non-equal path method, so that the wavefronts after coupling of the two compression cavities are cylindrical wavefronts with minimum interference, and the influence of an alto outlet in diffusion on a high pitch is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of speaker technology, and in particular to a three-way line array speaker. Background Technology

[0002] Low-mid-high frequency tri-range speakers are mainly used in outdoor sound reinforcement systems. Precise coverage angles ensure clarity, but the horizontal distance between midrange and bass frequencies affects the upper limit of the high-end frequency response when off-axis, thus impacting the connection between the bass, midrange, and treble at the crossover point. The most obvious effect is a dip in the off-axis frequency response at the crossover point; this primarily affects the midrange, hence the industry term "midrange waistline." In other words, the midrange coverage angle is significantly reduced, leading to uneven sound coverage and severely impacting the listening experience. The industry's main approach is to reduce the horizontal width of the treble dispersion and minimize the distance between midrange frequencies; however, this has two drawbacks: 1. The midrange coverage angle is still not ideal; 2. It reduces the lower limit of the treble's low-frequency end, raising the mid-high crossover point and further reducing the midrange coverage angle. Some industry solutions use similar midrange placement, but the open midrange significantly affects the treble's frequency response. Therefore, a three-way line array speaker is needed to solve these technical problems. Utility Model Content

[0003] The purpose of this invention is to provide a three-way line array speaker. The bass is directly radiated, and the midrange is located below the tweeter diffuser. This effectively reduces the horizontal distance between the midrange and bass frequencies, achieving a precise coverage angle and ensuring clear sound amplification. The midrange phase plug combined with the horizontal strip outlet ensures that the interference between the wavefronts of the two compression chamber outlets is minimized by using a non-equidistant path method. This results in the coupled wavefronts of the two compression chambers being cylindrical wavefronts with minimal interference, effectively reducing the impact of the midrange outlet on the tweeter during diffusion.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a three-way line array speaker, comprising a cabinet; wherein: bass cavities are symmetrically arranged at the left and right ends of the cabinet; multiple midrange cavities are symmetrically arranged between the bass cavities; a plurality of tweeters are arranged in the middle of the cabinet along the central axis of the symmetrically arranged midrange cavities; a bass component is provided on each bass cavity; a midrange component is provided on each midrange cavity; a compression tweeter component is provided on each tweeter cavity; the compression tweeter component is connected to the midrange cavity via a tweeter horn.

[0005] As a further improvement to the technical solution of this utility model, the midrange component includes a midrange speaker enclosure and a midrange phase plug; the midrange speaker enclosure is installed in the midrange cavity; the midrange phase plug is disposed at the opening of the midrange cavity; a compression cavity is formed between the midrange phase plug and the midrange diaphragm of the midrange speaker enclosure.

[0006] As a further improvement to the technical solution of this utility model, the mid-range phase plug is provided with multiple horizontal strip-shaped outlets.

[0007] As a further improvement to the technical solution of this utility model, one end edge of the mid-range phase plug extends to the outlet of the treble horn; the arcuate top surface of the mid-range phase plug forms a treble diffusion boundary.

[0008] As a further improvement to the technical solution of this utility model, the treble horn includes a housing and a treble phase plug; a treble inlet is provided at the bottom of the housing; the treble inlet is connected to the compression treble assembly; the treble phase plug is built into the housing; the outer surface of the treble phase plug and the inner sidewall of the housing respectively form a vertical channel and a horizontal channel; the outlet of the vertical channel and the outlet of the horizontal channel are both connected to the midrange phase plug.

[0009] As a further improvement to the technical solution of this utility model, the midrange cavity is provided with four chambers; the tweeter cavity is provided with two chambers.

[0010] As a further improvement to the technical solution of this utility model, the enclosure is provided with a bass phase guide hole at the top of the bass cavity.

[0011] As a further improvement to the technical solution of this utility model, a mid-range phase guide hole is provided on the top of the mid-range cavity of the enclosure.

[0012] The beneficial effects of this utility model are:

[0013] This invention features symmetrical bass cavities arranged at both ends of the enclosure; multiple midrange cavities arranged obliquely and symmetrically between the bass cavities; and several tweeter cavities located in the middle of the enclosure and below the midrange cavities. This design allows for direct bass response and midrange frequencies below the tweeter diffuser, effectively reducing the horizontal distance between midrange frequencies and bass frequencies, achieving precise coverage angles and ensuring clear amplification. Furthermore, the use of a midrange phase plug combined with a horizontal strip outlet ensures that the interference between the wavefronts of the two compression cavity outlets is achieved through a non-equidistant path method, resulting in a cylindrical wavefront with minimal interference after coupling between the two compression cavities. This effectively reduces the impact of the midrange outlet during diffusion on the tweeters. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0015] Figure 1 This is a three-dimensional structural diagram of a three-way line array speaker according to an embodiment of the present invention;

[0016] Figure 2 This is a horizontal internal sectional view of a three-way line array speaker according to an embodiment of the present invention;

[0017] Figure 3 This is a vertical internal sectional view of a three-way line array speaker according to an embodiment of the present invention;

[0018] Figure 4 This is a horizontal internal three-dimensional sectional view of a three-way line array speaker according to an embodiment of the present invention;

[0019] Figure 5 This is a vertical internal three-dimensional sectional view of a three-way line array speaker according to an embodiment of the present invention;

[0020] Figure 6 This is one of the perspective views of the assembly structure of the high-pitched horn and the mid-pitched phase plug according to an embodiment of this utility model;

[0021] Figure 7 This is the second perspective view of the assembly structure of the high-pitched horn and the mid-pitched phase plug according to an embodiment of this utility model;

[0022] Figure 8 This is a vertical cross-sectional view of the assembly of the high-pitched horn and the mid-pitched phase plug in an embodiment of this utility model;

[0023] Figure 9 This is a horizontal cross-sectional view of the assembly of the high-pitched horn and the mid-pitched phase plug in an embodiment of this utility model;

[0024] Figure 10 This is a schematic diagram of the simulated sound pressure in an embodiment of this utility model;

[0025] Figure 11 This is a schematic diagram of the frequency response after adding a phase plug to the tone in an embodiment of this utility model;

[0026] Figure 12 This is a schematic diagram illustrating the horizontal directivity of the high-pitched horn in an embodiment of this utility model;

[0027] Figure 13 This is a schematic diagram illustrating the vertical directional orientation of the high-pitched horn in an embodiment of this utility model.

[0028] In the attached diagram: 1-cabinet; 2-woofer assembly; 3-midrange assembly; 4-compression tweeter assembly; 5-tweeter horn; 11-woofer cavity; 12-midrange cavity; 13-tweeter cavity; 14-woofer port; 15-midrange port; 31-midrange speaker enclosure; 32-midrange phase plug; 33-horizontal strip outlet; 34-compression cavity; 51-shell; 52-tweeter phase plug; 53-vertical channel; 54-horizontal channel; 55-tweeter inlet. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, upper end, lower end, top, bottom, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] In this utility model, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this utility model.

[0033] The present invention will be further described in detail below with reference to the accompanying drawings.

[0034] like Figures 1 to 9As shown, a three-way line array speaker includes a cabinet 1; wherein: bass cavities 11 are symmetrically arranged at the left and right ends of the cabinet 1; a plurality of midrange cavities 12 are obliquely and symmetrically arranged between the bass cavities 11; a plurality of tweeters 13 are arranged in the middle of the cabinet 1, on the central axis of the symmetrically arranged midrange cavities 12; a bass component 2 is provided on each bass cavity 11; a midrange component 3 is provided on each midrange cavity 12; a compression tweeter component 4 is provided on each tweeter cavity 13; the compression tweeter component 4 is connected to the midrange cavity 12 via a tweeter horn 5. By symmetrically arranging bass cavities 11 at the left and right ends of the cabinet 1; symmetrically arranging a plurality of midrange cavities 12 between the bass cavities 11; and symmetrically arranging a plurality of tweeters 13 in the middle of the cabinet 1, below the midrange cavities 12, the bass is directly radiated, and the midrange is below the tweeter diffuser, effectively reducing the horizontal distance of the midrange and also reducing the distance between bass cavities. Achieve precise speaker coverage angle to ensure clear sound amplification.

[0035] It should be noted that the overall structure of the speaker of this utility model is as follows: This speaker consists of 2 horizontally placed bass units, 4 mid-range units with a certain angle, and 2 compressed tweeters; the bass and mid-range units each have their own independent cavities to effectively prevent mutual interference.

[0036] Reference Figures 6 to 11 Specifically, in this embodiment, the midrange component 3 includes a midrange speaker enclosure 31 and a midrange phase plug 32. The midrange speaker enclosure 31 is installed in the midrange cavity 12. The midrange phase plug 32 covers the opening of the midrange cavity 12. A compression cavity 34 is formed between the midrange phase plug 32 and the midrange diaphragm of the midrange speaker enclosure 31. It should be noted that the midrange phase plug 32 forms a compression cavity 34 with the midrange diaphragm, its shape following the shape of the midrange diaphragm, its thickness greater than the maximum amplitude of the midrange, and the resonant frequency of the compression cavity 34 is outside the midrange operating frequency. The phase plug has horizontal strip-shaped outlets, the size and spacing of which are calculated based on the high-frequency operating frequency.

[0037] Specifically, in this embodiment, the midrange phase plug 32 has multiple horizontal strip-shaped outlets 33 arranged on it. It should be noted that this utility model uses the midrange phase plug 32 in combination with the horizontal strip-shaped outlets 33 to make the interference of the wavefronts of the two compression cavity outlets adopt a non-equidistant path method, so that the wavefront after the two compression cavities are coupled is a cylindrical wavefront with minimal interference, effectively reducing the influence of the midrange outlets on the high frequencies during diffusion.

[0038] Specifically, in this embodiment, one edge of the mid-range phase plug 32 extends to the outlet of the treble horn 5; the arcuate top surface of the mid-range phase plug 32 forms a treble diffusion boundary.

[0039] Reference Figures 6 to 9 as well as Figure 12 and Figure 13 Specifically, in this embodiment, the treble horn 5 includes a housing 51 and a treble phase plug 52; a treble inlet 55 is provided at the bottom of the housing 51; the treble inlet 55 is connected to the compression treble assembly 4; the treble phase plug 52 is built into the housing 51; the outer surface of the treble phase plug 52 and the inner wall of the housing 51 respectively form a vertical channel 53 and a horizontal channel 54; the outlets of the vertical channel 53 and the horizontal channel 54 are both connected to the midrange phase plug 32. It should be noted that the treble horn 5, after simulation and optimization, has a horizontal coverage angle of 90 degrees and a vertical coverage angle of 10 degrees. Due to the dual compression cavity coupling, to avoid interference between the wavefronts of the two compression cavity outlets, a non-equidistant path method is used to make the wavefront after coupling the two compression cavities the cylindrical wavefront with minimal interference. To minimize the influence of the midrange outlet on the treble during diffusion, a strip-shaped outlet of a certain size is used after optimization. Explanation: The treble diffusion boundary is used to control the horizontal coverage angle of the treble and its lower frequency limit; the compression cavity is used to provide a matched impedance to the treble to improve its output efficiency.

[0040] Specifically, in this embodiment, four midrange cavities 12 and two tweeter cavities 13 are provided. It should be noted that, depending on the actual situation, the number of midrange cavities 12 and tweeter cavities 13 can be set to other different numbers, not limited to the number specified in the above embodiment.

[0041] Specifically, in this embodiment, the enclosure 1 is provided with a bass phase guide hole 14 at the top of the bass cavity 11.

[0042] Specifically, in this embodiment, the enclosure 1 is provided with a mid-range phase guide hole 15 at the top of the mid-range cavity 12.

[0043] This invention employs a 3-way (bass, midrange, and treble) structure. The bass is directly radiated, and the midrange is located below the treble diffuser, effectively reducing the horizontal distance between the midrange and bass frequencies. A midrange phase plug 32 combined with a horizontal strip outlet 33 ensures that the interference between the wavefronts at the two compression chamber outlets is achieved using a non-equidistant path method, resulting in a cylindrical wavefront with minimal interference after coupling between the two compression chambers. This effectively reduces the impact of the midrange outlet on the treble during diffusion. This invention is primarily used in outdoor sound reinforcement systems, providing precise coverage angles and ensuring clear sound reinforcement.

[0044] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A three-way line array speaker, comprising a cabinet; characterized in that: The enclosure has symmetrically arranged bass cavities at its left and right ends; multiple mid-range cavities are arranged obliquely and symmetrically between the bass cavities; several tweeters are arranged in the middle of the enclosure and on the central axis of the symmetrically arranged mid-range cavities; a bass component is provided on the bass cavities; a mid-range component is provided on each mid-range cavity; a compression tweeter component is provided on the tweeters; the compression tweeter component is connected to the mid-range cavity through a tweeter horn.

2. A three-way line array speaker according to claim 1, characterized in that: The midrange component includes a midrange speaker enclosure and a midrange phase plug; the midrange speaker enclosure is installed in the midrange cavity; the midrange phase plug is disposed at the opening of the midrange cavity; a compression cavity is formed between the midrange phase plug and the midrange diaphragm of the midrange speaker enclosure.

3. A three-way line array speaker according to claim 2, characterized in that: The mid-range phase plug has multiple horizontal strip-shaped outlets arranged on it.

4. A three-way line array speaker according to claim 2, characterized in that: One edge of the mid-range phase plug extends to the outlet of the treble horn; the curved top surface of the mid-range phase plug forms a treble diffusion boundary.

5. A three-way line array speaker according to claim 2, characterized in that: The treble horn includes a housing and a treble phase plug; a treble inlet is provided at the bottom of the housing; the treble inlet is connected to the compression treble assembly; the treble phase plug is built into the housing; the outer surface of the treble phase plug and the inner wall of the housing respectively form a vertical channel and a horizontal channel; the outlet of the vertical channel and the outlet of the horizontal channel are both connected to the midrange phase plug.

6. A three-way line array speaker according to claim 1, characterized in that: The midrange cavity is provided with four chambers; the treble cavity is provided with two chambers.

7. A three-way line array speaker according to claim 1, characterized in that: The enclosure is located at the top of the bass cavity and has a bass phase guide hole.

8. A three-way line array speaker according to claim 1, characterized in that: The enclosure is provided with a mid-range phase guide hole at the top of the mid-range cavity.

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