A loudspeaker system with a waveguide horn featuring an asymmetric radiating structure and its front cover

Abstract

This invention relates to a loudspeaker system with a waveguide horn having an asymmetric radiation structure and its front cover. The loudspeaker system includes a woofer, at least one tweeter, and a speaker enclosure. The front side of the speaker enclosure has a first mounting hole and at least one waveguide horn. The first mounting hole can mount the woofer, and the throat of each waveguide horn can mount the tweeter. Each waveguide horn includes a plurality of radiation diffusion surfaces. Taking the center point of the woofer's location as a reference plane, each radiation diffusion surface has a central cutoff line, and each central cutoff line has a projection distance relative to the reference plane. The lengths of the projection distances are different from each other. Thus, through the asymmetric feature of these radiation diffusion surfaces, the timbre produced by the tweeter can be effectively adjusted, and the sound diffusion pattern can be controlled, thereby changing the directional coverage of the sound.

Description

Technical Field

[0001] This invention relates to a loudspeaker system, and more particularly to a loudspeaker system having multiple tweeters, each tweeter having an asymmetrical radiation diffusion surface in the waveguide horn in which it is located. Prior Technology

[0002] Note that sound itself has a distinct directional characteristic. The sound pressure level is strongest when the listener is directly facing the speaker and positioned on its central axis. However, as the listener deviates from the central axis, the sound pressure gradually decreases, and the greater the deviation angle, the more significant the decrease in sound pressure. This phenomenon is known as the off-axis response characteristic of sound, and it is an important factor to consider when designing loudspeakers. Therefore, waveguide horns are a common acoustic structure in loudspeaker system design, primarily used to improve the directivity and diffusion characteristics of high-frequency sounds.

[0003] As mentioned above, the design of traditional waveguide horns typically utilizes their geometric structure to improve the directivity and off-axis response characteristics of sound. Generally speaking, the basic structure of a waveguide horn includes a throat, a radiation diffusion surface, and a horn opening. The radiation diffusion surface gradually expands outward from the throat and eventually forms a large radiation area at the horn opening. The aforementioned design structure can concentrate the propagation direction of high-frequency sound waves, enhance the directivity of sound, and reduce the loss of sound energy.

[0004] However, existing waveguide horn designs mostly employ symmetrical structures, which present significant limitations when dealing with complex acoustic requirements, especially in architectures with multiple tweeters. This can lead to blind spots within the tweeter coverage area, thus failing to achieve the desired ideal listening soundstage. Therefore, effectively solving the aforementioned problems is a key objective of this invention. Summary of the Invention

[0005] In order to stand out in the highly competitive market, the inventors, with a spirit of continuous improvement, have finally developed a loudspeaker system with a waveguide horn and its front cover after a long period of research and experimentation. The inventors hope to gain market favor through the advent of this invention.

[0006] One objective of this invention is to provide a loudspeaker system with a waveguide horn having an asymmetric radiation structure, comprising a woofer, at least one tweeter, and a speaker enclosure. The front side of the speaker enclosure is divided into an inner ring region and an outer ring region. The inner ring region has a first mounting hole for mounting the woofer. The outer ring region has at least one waveguide horn, and each waveguide horn has a second mounting hole at its throat for mounting the corresponding tweeter. Furthermore, each waveguide horn includes a plurality of radiating diffusion surfaces and a plurality of horn rims. Each radiating diffusion surface extends from the corresponding horn rim towards the throat from front to back. Using the center point of the first mounting hole as a reference plane, each radiating diffusion surface has a central cut-off line that passes through the center of the corresponding horn rim and the center of the throat, and each has a projection distance relative to the reference plane, the lengths of which are different from each other. Thus, by utilizing the asymmetrical characteristics of these radiation diffusion surfaces, the timbre produced by the tweeter can be effectively adjusted, and the sound diffusion pattern can be controlled, thereby changing the directional coverage of the sound.

[0007] Optionally, the waveguide horn includes four radiation diffusion surfaces: a first radiation diffusion surface, a second radiation diffusion surface, a third radiation diffusion surface, and a fourth radiation diffusion surface. The first radiation diffusion surface extends from the edge of a first horn opening towards the throat, and has a first central cutoff line that passes through the center of the edge of the first horn opening and the center of the throat, with a first projection distance relative to the reference plane. The second radiation diffusion surface extends from the edge of a second horn opening towards the throat, and has a second central cutoff line that passes through the center of the edge of the second horn opening and the center of the throat, with a first projection distance relative to the reference plane. The second projection distance; the third radiation diffusion surface extends from the edge of a third horn towards the throat from front to back, the third radiation diffusion surface has a third central cut-off line, the third central cut-off line can pass through the center of the edge of the third horn and the center of the throat, and the third central cut-off line has a third projection distance relative to the reference plane; the fourth radiation diffusion surface extends from the edge of a fourth horn towards the throat from front to back, the fourth radiation diffusion surface has a fourth central cut-off line, the fourth central cut-off line can pass through the center of the edge of the fourth horn and the center of the throat, and the fourth central cut-off line has a fourth projection distance relative to the reference plane; furthermore, the lengths of the first projection distance, the second projection distance, the third projection distance and the fourth projection distance are different from each other.

[0008] Optionally, the first horn edge and the second horn edge are opposite to each other, and the first horn edge is closer to the inner ring area, while the second horn edge is closer to the edge of the speaker housing; the third horn edge and the fourth horn edge are opposite to each other and are respectively connected to the first horn edge and the second horn edge.

[0009] Optionally, the length of the first projection distance is less than the second projection distance.

[0010] Optionally, in two adjacent waveguide horns, the third radiation diffusion surface of one waveguide horn corresponds to the fourth radiation diffusion surface of the other waveguide horn, and the third projection distance of the aforementioned waveguide horn is greater than the fourth projection distance of the other waveguide horn.

[0011] Optionally, all waveguide horns on the speaker housing have the same shape and configuration.

[0012] Optionally, all waveguide horns on the speaker housing have different shapes and configurations.

[0013] Optionally, the speaker housing includes a front cover and a rear cover, wherein the front cover has the first mounting hole, each of the waveguide horns and each of the second mounting holes; the rear cover is assembled with the front cover, and a reflection chamber can be formed between the rear cover and the front cover.

[0014] Optionally, the first horn opening edge and the second horn opening edge are arc-shaped.

[0015] Another object of the present invention is to provide a front cover with a waveguide horn having an asymmetric radiation structure, which is applied to a speaker housing. The front cover includes a first mounting hole, at least one waveguide horn, and at least one second mounting hole. The first mounting hole is used to mount a woofer and is located in the inner ring region on the front side of the front cover assembly. Each waveguide horn is located in the outer ring region on the front side of the front cover assembly. Each second mounting hole is used to mount a tweeter and is located at the throat position of the corresponding waveguide horn. Furthermore, each waveguide horn includes a plurality of radiation diffusion surfaces and a plurality of horn apertures. Each radiation diffusion surface extends from the corresponding horn aperture towards the throat from front to back. Taking the center point of the first mounting hole as a reference plane, each radiation diffusion surface has a central cut-off line. Each central cut-off line can pass through the center of the corresponding horn aperture and the center of the throat, and each has a projection distance relative to the reference plane. The lengths of each projection distance are different from each other.

[0016] To enable the esteemed review committee to gain a further understanding of the purpose, technical features, and effects of this invention, the following detailed description is provided, along with accompanying drawings: Simple Explanation of the Diagram

[0017] [Figure 1] is a perspective view of the loudspeaker of the present invention; [Figure 2] is a front view schematic diagram of the loudspeaker of the present invention; [Figure 3] is an exploded schematic diagram of the loudspeaker of the present invention; [Figure 4] is a perspective view of the front cover of the present invention; [Figure 5A] is a cross-sectional schematic diagram of the first radiation diffusion surface of the present invention; [Figure 5B] is a cross-sectional schematic diagram of the second radiation diffusion surface of the present invention; [Figure 5C] is a cross-sectional schematic diagram of the third radiation diffusion surface of the present invention; and [Figure 5D] is a cross-sectional schematic diagram of the fourth radiation diffusion surface of the present invention. Implementation

[0018] To make the objectives, technical content, and advantages of this invention clearer, the following description, in conjunction with specific embodiments and accompanying drawings, provides further insight. Those skilled in the art will understand the advantages and effects of this invention, and the invention can be applied through other different specific embodiments. Details in this specification can be modified and changed without departing from the concept of this invention. Furthermore, the accompanying drawings are for simple illustration only and are not depictions of actual dimensions. Moreover, unless explicitly indicated or defined in the context, the terms "a" and "the" in this invention include the plural.

[0019] It should be understood that the terms used herein generally have their common meaning in the art, and in case of conflict, any definition given herein shall prevail. Since the same thing can be expressed in multiple ways, the use of alternatives or synonyms does not exclude other synonyms, and the use of terms is illustrative only and does not limit the scope or meaning of the invention or any term. The terms first, second, or third, etc., may be used herein to describe various elements. These terms are used to distinguish one element from another and should not impose any substantial limitations on any element, nor should they limit the assembly or arrangement order of the elements in practical applications. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference to the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the scope of protection of the invention.

[0020] This invention relates to a loudspeaker system with a waveguide horn having an asymmetric radiating structure and its front cover, as shown in Figures 1 to 3. In one embodiment, the loudspeaker system 1 includes a woofer 11, a plurality of tweeters 13, and a speaker enclosure 15. However, in other embodiments of this invention, depending on product requirements, the number of tweeters 13 may be one. Furthermore, to facilitate the explanation of the component features and relative positional relationships, the spatial form of the component will be defined in the following description based on three mutually orthogonal axes: the horizontal axis (X-axis), the vertical axis (Y-axis), and the depth axis (Z-axis). Specifically, the horizontal axis (X-axis) refers to the left-right extension direction, where the upper left of Figure 1 is the left side direction of the component, and the lower right of Figure 1 is the right side direction of the component; the vertical axis (Y-axis) refers to the up-down extension direction, where the upper part of Figure 1 is the upper (top) side direction of the component, and the lower part of Figure 1 is the lower (bottom) side direction of the component; the depth axis (Z-axis) refers to the front-back extension direction, where the lower left of Figure 1 is the front side direction of the component, and the upper right of Figure 1 is the rear side direction of the component.

[0021] Referring again to Figures 1 to 3, the woofer 11 is responsible for generating low-frequency sound effects, with a frequency response range typically from 20Hz to 1kHz; the tweeter 13 is responsible for generating high-frequency sound effects, with a frequency response range typically from 1kHz to above 20kHz. Since the specific structures of the woofer 11 and tweeter 13 are well-known in the art and can be constructed from conventional components such as a voice coil, magnet, and diaphragm, any unit sufficient to produce the aforementioned low-frequency and high-frequency sound effects can be considered as the woofer 11 and tweeter 13 of this invention.

[0022] Furthermore, referring to Figures 1 to 3, the front side of the speaker housing 15 can be divided into an inner ring region and an outer ring region. The inner ring region is mainly close to the center of the front side of the speaker housing 15 and has a first mounting hole 16 for mounting the woofer 11. The outer ring region is located outside the inner ring region, usually near the edge of the speaker housing 15, and has a plurality of waveguide horns 17. The waveguide horns 17 have a three-dimensional configuration that gradually tapers from front to back. The frontmost part of the waveguide horn 17 is the horn opening, which is the widest part of the whole; the rearmost part of the waveguide horn 17 is the throat opening, which is the narrowest part of the whole. Each waveguide horn 17 has a second mounting hole 170 at its throat opening for mounting the tweeter 13. However, depending on the number of tweeters 13, there can also be only one waveguide horn 17.

[0023] Referring again to Figures 1 to 3, in this embodiment, the speaker housing 15 includes a front cover 151 and a rear cover 153. Both the front cover 151 and the rear cover 153 can be a single component or composed of multiple components. The front cover 151 may have a first mounting hole 16, a waveguide horn 17, and a second mounting hole 170, and can be assembled to the front of the rear cover 153. The rear cover 153 contains a reflection chamber 150, which can be used to control the reflection and diffusion of sound waves, thereby enhancing the low-frequency resonance effect and optimizing the low-frequency sound performance. However, depending on the actual product or production needs, in some embodiments, the speaker housing 15 may be composed of a single element or more elements, and is not limited to the aforementioned front cover 151 and rear cover 153 structure; or, in some embodiments, the speaker housing 15 may be composed only of the form of the front cover 151, and the assembly with the external environment may form the required reflective chamber 150. For example, when the speaker system 1 adopts a ceiling-mounted structure, the speaker housing 15 (front cover 151) may be assembled into an opening in the ceiling. In this case, the speaker housing 15 (front cover 151) and the space inside the ceiling may together form the reflective chamber 150. In addition, in some embodiments, the reflective chamber 150 can be completely disposed in the front cover 151, or a portion of the reflective chamber 150 can be disposed in the front cover 151, while the remaining portion can be disposed in the rear shell 153. In other words, regardless of the specific structure, as long as the reflective chamber 150 is located between the front cover 151 and the rear shell 153, or can combine with the external environment to form the required acoustic characteristics, it is acceptable.

[0024] Furthermore, referring again to Figure 2, in this embodiment, the speaker housing 15 is provided with four waveguide horns 17, and all waveguide horns 17 have the same shape and configuration, and can be equally spaced around the outer ring area, but this is not a limitation. In some embodiments, the speaker housing 15 can be provided with two or more waveguide horns 17; or, all waveguide horns 17 on the speaker housing 15 can have different shapes and configurations; or, some waveguide horns 17 have the same shape and configuration, while the remaining waveguide horns 17 have different shapes and configurations; or, the spacing between multiple waveguide horns 17 can be different; thus, the shape, number, and position of each waveguide horn 17 can be flexibly adjusted according to actual product requirements.

[0025] In this embodiment, as shown in Figures 2 and 4, each waveguide horn 17 has the same shape configuration, and the waveguide horn 17 can be surrounded by four radiation diffusion surfaces, namely a first radiation diffusion surface 171, a second radiation diffusion surface 172, a third radiation diffusion surface 173 and a fourth radiation diffusion surface 174. The first radiation diffusion surface 171 and the second radiation diffusion surface 172 are opposite to each other, and the third radiation diffusion surface 173 and the fourth radiation diffusion surface 174 are opposite to each other. Therefore, the horn opening of the waveguide horn 17 can be formed by connecting the first horn opening edge 1711, the second horn opening edge 1721, the third horn opening edge 1731 and the fourth horn opening edge 1741. The first horn opening edge 1711 is closer to the inner ring area (i.e., closer to the first mounting hole 16), the second horn opening edge 1721 is closer to the edge of the speaker housing 15 (i.e., farther from the first mounting hole 16), the two ends of the third horn opening edge 1731 are respectively connected to one end of the first horn opening edge 1711 and the second horn opening edge 1721, and the two ends of the fourth horn opening edge 1741 can be connected to the other end of the first horn opening edge 1711 and the second horn opening edge 1721.

[0026] Specifically, referring again to Figures 2 and 4, the first radiation diffusion surface 171 extends from the first horn opening edge 1711 towards the throat (i.e., the direction of the second mounting hole 170). The first radiation diffusion surface 171 has a first central cut-off line L1, which passes through the center of the first horn opening edge 1711 and the center of the throat. The second radiation diffusion surface 172 extends from the second horn opening edge 1721 towards the throat (i.e., the direction of the second mounting hole 170). The second radiation diffusion surface 172 has a second central cut-off line L2, which passes through the center of the second horn opening edge 1721. The third radiation diffusion surface 173 extends from the third horn edge 1731 toward the throat (i.e., the direction of the second mounting hole 170), and the third radiation diffusion surface 173 has a third central cut-off line L3, which can pass through the center of the third horn edge 1731 and the center of the throat; the fourth radiation diffusion surface 174 extends from the fourth horn edge 1741 toward the throat (i.e., the direction of the second mounting hole 170), and the fourth radiation diffusion surface 174 has a fourth central cut-off line L4, which can pass through the center of the fourth horn edge 1741 and the center of the throat.

[0027] Referring to Figures 4 and 5A to 5D, an imaginary plane defined with the center point of the first mounting hole 16 as the reference is used as the reference plane R. This reference plane R lies on the coordinate plane formed by the horizontal axis (X-axis) and the vertical axis (Y-axis). It should be noted that the reference plane R can be moved in the figures as needed to indicate the projection distance mentioned later. Such positional changes are limited to the indication requirements of the drawings in the specification and do not affect the definition of the reference plane R. Furthermore, as shown in Figure 5A, the first central truncated line L1 of the first radiation diffusion surface 171 has a first projected distance P1 relative to the reference plane R; as shown in Figure 5B, the second central truncated line L2 of the second radiation diffusion surface 172 has a second projected distance P2 relative to the reference plane R; as shown in Figure 5C, the third central truncated line L3 of the third radiation diffusion surface 173 has a third projected distance P3 relative to the reference plane R; and as shown in Figure 5D, the fourth central truncated line L4 of the fourth radiation diffusion surface 174 has a fourth projected distance P4 relative to the reference plane R. Moreover, the lengths of the first projected distance P1, the second projected distance P2, the third projected distance P3, and the fourth projected distance P4 are all different from each other.

[0028] Taking the speaker system 1 installed on the ceiling (i.e., a ceiling-mounted structure) as an example, please refer to Figures 1 to 4. Since the tweeter has extremely strong off-axis response characteristics (i.e., directivity), the radiation angle of the tweeter can be adjusted through the multiple radiation diffusion surfaces of the asymmetrical structure of the waveguide horn 17, avoiding excessive concentration or excessive diffusion of audio, thereby effectively adjusting the directivity and timbre of the sound to achieve a better listening effect. Specifically, in this embodiment, the length of the first projection distance P1 can be less than the length of the second projection distance P2. When the first projection distance P1 is shorter, it indicates that the first radiation diffusion surface 171 is steeper. The aforementioned configuration can increase the crossover distance between tweeter frequencies, thereby reducing the mutual interference between the two opposing tweeter units 13 (the uppermost and lowermost tweeter units 13 in Figure 2). Furthermore, when the second projection distance P2 is relatively long, it indicates that the second radiation diffusion surface 172 is relatively flat. Since the radiation direction of the second radiation diffusion surface 172 is outward, the aforementioned configuration can make the scattering of sound waves more diffuse, thereby increasing the radiation coverage of the tweeter 13. In addition, in this embodiment, the first horn edge 1711 and the second horn edge 1721 can be arc-shaped (but not limited thereto), so that the horn opening of the waveguide horn 17 can form an arc-shaped horn pattern set along the periphery of the woofer 11. The aforementioned configuration helps the sound waves to be evenly distributed in space, reducing the excessive concentration or excessive dispersion of sound energy. At the same time, the arc-shaped horn opening can also effectively reduce the phase interference caused by sound wave reflection, thereby improving the stability of the sound field and the clarity of the sound.

[0029] Referring again to Figures 1 to 4, since the loudspeaker system 1 ring has a plurality of waveguide horns 17, as shown in Figure 2, between two adjacent waveguide horns 17, the third radiation diffusion surface 173 of the uppermost waveguide horn 17 corresponds to the fourth radiation diffusion surface 174 of the leftmost waveguide horn 17. Furthermore, the third projection distance P3 of the aforementioned third radiation diffusion surface 173 is greater than the fourth projection distance P4 of the aforementioned fourth radiation diffusion surface 174. Thus, since the two adjacent waveguide horns 17 have different geometric shapes for their corresponding radiation diffusion surfaces, with the third radiation diffusion surface 173 having a gentler shape and the fourth radiation diffusion surface 174 having a steeper shape, the mutual interference between the two tweeters 13 can be effectively reduced, and the clarity and directivity of the sound effect can be improved. At the same time, the effect formed by the different radiation diffusion surfaces (such as the third radiation diffusion surface 173 and the fourth radiation diffusion surface 174) of the two adjacent waveguide horns 17 can further optimize the overall smoothness of the tweeter and enhance the harmony and consistency of the sound field of the speaker system 1. It should be noted that the meaning of "correspondence" mentioned above refers to the interrelationship in position and direction of the waveguide horns 17 in the arrangement order along the outer region. Therefore, the arrangement and correspondence of the third radiation diffusion surface 173 and the fourth radiation diffusion surface 174 do not necessarily have to be completely opposite. For example, the waveguide horns 17 are arranged in a ring along the outer region, and each waveguide horn 17 is located at the 3 o'clock, 6 o'clock, 9 o'clock and 12 o'clock positions respectively. Therefore, the waveguide horns 17 at the 12 o'clock and 9 o'clock positions are adjacent, and the third radiation diffusion surface 173 and the fourth radiation diffusion surface 174 that are close to each other are corresponding.

[0030] Furthermore, depending on the installation location and individual listening needs of the speaker system 1, it may not be necessary for all tweeters 13 to operate simultaneously (i.e., emit sound). Therefore, referring to Figures 1 to 3, in this embodiment, the speaker system 1 also includes a tweeter on / off control unit 18, which comprises a plurality of tweeter control switches 181. Each tweeter control switch 181 is electrically connected to a different tweeter 13 and can independently control the on / off state of its respective tweeter 13. Thus, the user can choose to turn on or off any number of tweeters 13 according to actual needs, thereby adjusting the sound field distribution characteristics and changing the directional coverage area of ​​the speaker system 1 to reduce unnecessary high-frequency sound wave interference and further improve the clarity of the sound field and the accuracy of the sound effects.

[0031] Furthermore, sound is a composite wave composed of multiple superimposed frequencies. The lowest frequency in the composite wave is called the fundamental frequency, which is usually the part with the most energy in the composite wave (sound wave) and determines the pitch of the sound wave. Frequencies other than the fundamental frequency are called overtones, which are usually integer multiples of the fundamental frequency. Different sound-producing bodies produce unique timbres due to the different proportions of overtones, which is also a key factor in determining sound quality. Based on this, please refer to Figures 1 to 3. In this embodiment, the loudspeaker system 1 is also provided with a timbre adjustment unit 19, which includes a plurality of timbre control switches 191. Each timbre control switch 191 is electrically connected to a different tweeter 13 and can independently control the frequency range of its respective tweeter 13. For example, the four tweeters 13 of this invention can be set to frequencies such as 2500Hz, 5000Hz, 10000Hz, and 2500Hz respectively. In this way, users can adjust the frequency range of each tweeter 13 according to actual needs, thereby changing the fundamental frequency and overtone distribution between the tweeters 13, achieving fine adjustment of timbre, and further meeting the listening needs of multiple scenarios and personalized timbre preferences.

[0032] In summary, referring again to Figures 1 to 3, the waveguide horn 17 of the present invention has multiple radiation diffusion surfaces that are asymmetrical in shape, angle, or extension direction and of unequal length. Therefore, it can effectively adjust the timbre of the sound produced by the tweeter 13 and control the sound diffusion mode, thereby changing its directional coverage range. However, in other embodiments of the present invention, depending on the actual needs of the product, the number of radiation diffusion surfaces of the waveguide horn 17 is not limited to four, as long as there are multiple radiation diffusion surfaces and their projection distances are different. It is worth mentioning that in this embodiment, the waveguide horn 17 is integrally formed on the front cover 151, but this is not a limitation. In some embodiments, the waveguide horn 17 can be made as an independent component, and the front cover 151 can be provided with assembly holes to install the waveguide horn 17. In this way, depending on the type of speaker system 1, installation site, location, and usage requirements, different shapes and configurations of the waveguide horn 17 can be conveniently replaced to meet different sound effect requirements.

[0033] Note that the above description is only a preferred embodiment of the present invention. However, the scope of the rights claimed by the present invention is not limited thereto. All equivalent variations that can be easily conceived by those skilled in the art based on the technical content disclosed in the present invention should be included within the protection scope of the present invention.

[0034] [This invention] 1: Loudspeaker system 11: Bass driver 13: Tweeter 15: Speaker housing 150: Reflection Chamber 151: Front Cover 153: Back cover 16: First mounting hole 17: Waveguide Horn 170: Second mounting hole 171: First radiative diffusion surface 1711: The First Horn 172: Second radiative diffusion surface 1721: The Second Horn Mouth 173: Third radiative diffusion surface 1731: The Third Horn 174: Fourth radiative diffusion surface 1741: The Fourth Horn 18: High-frequency opening and closing control section 181: Tweeter control switch 19: Tone adjustment section 191: Tone Control Switch L1: First Central Cutoff Line L2: Second Central Cutoff Line L3: Third Central Cutoff Line L4: Fourth Central Cutoff Line P1: First projection distance P2: Second projection distance P3: Third projection distance P4: Fourth projection distance R: Reference plane

Claims

1. A loudspeaker system with a waveguide horn having an asymmetric radiating structure, comprising: One woofer; at least one tweeter; A speaker enclosure is provided, the front of which is divided into an inner ring area and an outer ring area. The inner ring area is provided with a first mounting hole for mounting the woofer. The outer ring area is provided with at least one waveguide horn, and each waveguide horn has a second mounting hole at its throat for mounting the corresponding tweeter. Each waveguide horn includes four radiation diffusion surfaces and four horn openings. Each radiation diffusion surface extends from the corresponding horn opening towards the throat from front to back. Using the center point of the first mounting hole as a reference plane, each radiation diffusion surface has a central cut-off line. Each central cut-off line passes through the center of the corresponding horn opening and the center of the throat, and each has a projection distance relative to the reference plane. The lengths of each projection distance are different. Among these radiation diffusion surfaces, the projection distance of the radiation diffusion surface adjacent to the first mounting hole is smaller than the projection distance of the radiation diffusion surface farther from the first mounting hole. These radiation diffusion surfaces are: a first radiation diffusion surface, which extends from a first horn opening towards the throat from front to back. The first radiation diffusion surface has a first central cut-off line, which passes through the center of the first horn opening and the center of the throat, and the first central cut-off line has a first projection distance relative to the reference plane. A second radiation diffusion surface extends from the edge of a second horn opening in a front-to-back direction toward the throat. The second radiation diffusion surface has a second central cut-off line that passes through the center of the edge of the second horn opening and the center of the throat, and the second central cut-off line has a second projected distance relative to the reference plane; a third radiation diffusion surface extends from the edge of a third horn opening in a front-to-back direction toward the throat. The third radiation diffusion surface has a third central cut-off line that passes through the center of the edge of the third horn opening and the center of the throat, and the third central cut-off line has a third projected distance relative to the reference plane; and a fourth radiation diffusion surface extends from the edge of a fourth horn opening in a front-to-back direction toward the throat. The fourth radiation diffusion surface has a fourth central cut-off line that passes through the center of the edge of the fourth horn opening and the center of the throat, and the fourth central cut-off line has a fourth projected distance relative to the reference plane. The lengths of the first projection distance, the second projection distance, the third projection distance, and the fourth projection distance are all different from each other.

2. The loudspeaker system as described in claim 1, wherein, The first horn opening edge and the second horn opening edge are opposite to each other, and the first horn opening edge is closer to the inner ring area, while the second horn opening edge is closer to the edge of the speaker housing; the third horn opening edge and the fourth horn opening edge are opposite to each other and are respectively connected to the first horn opening edge and the second horn opening edge.

3. The loudspeaker system as described in claim 2, wherein, In two adjacent waveguide horns, the third radiation diffusion surface of one waveguide horn corresponds to the fourth radiation diffusion surface of the other waveguide horn, and the third projection distance of the aforementioned waveguide horn is greater than the fourth projection distance of the other waveguide horn.

4. The loudspeaker system as described in claim 2, wherein, All the waveguide horns on the speaker enclosure have the same shape and configuration.

5. The loudspeaker system as described in claim 2, wherein, All the waveguide horns on the speaker enclosure have different shapes and configurations.

6. The loudspeaker system as described in claim 2, wherein, The edges of the first and second horn openings are rounded.

7. The loudspeaker system as described in any one of claims 1 to 6, wherein, The speaker housing includes: a front cover having the first mounting hole, each of the waveguide horns and each of the second mounting holes; and a rear cover assembled with the front cover, wherein a reflective cavity is formed between the rear cover and the front cover.

8. A front cover with a waveguide horn having an asymmetric radiating structure, applied to a speaker enclosure, the front cover comprising the following structural features: a first mounting hole for mounting a woofer, disposed in the inner ring region on the front side of the front cover; at least one waveguide horn disposed in the outer ring region on the front side of the front cover; and at least one second mounting hole for mounting a tweeter, respectively disposed in the throat of each corresponding waveguide horn; wherein, Each waveguide horn includes four radiation diffusion surfaces and four horn openings. Each radiation diffusion surface extends from the corresponding horn opening towards the throat from front to back. Taking the center point of the first mounting hole as a reference plane, each radiation diffusion surface has a central cut-off line. Each central cut-off line passes through the center of the corresponding horn opening and the center of the throat, and each has a projection distance relative to the reference plane. The lengths of each projection distance are different. Among these radiation diffusion surfaces, the projection distance of the radiation diffusion surface adjacent to the first mounting hole is smaller than the projection distance of the radiation diffusion surface farther from the first mounting hole. The four radiation diffusion surfaces are: a first radiation diffusion surface, which extends from the first horn opening towards the throat from front to back. The first radiation diffusion surface has a first central cut-off line, which passes through the center of the first horn opening and the center of the throat, and the first central cut-off line has a first projection distance relative to the reference plane. A second radiation diffusion surface extends from the edge of a second horn opening in a front-to-back direction toward the throat. The second radiation diffusion surface has a second central cut-off line that passes through the center of the edge of the second horn opening and the center of the throat, and the second central cut-off line has a second projected distance relative to the reference plane; a third radiation diffusion surface extends from the edge of a third horn opening in a front-to-back direction toward the throat. The third radiation diffusion surface has a third central cut-off line that passes through the center of the edge of the third horn opening and the center of the throat, and the third central cut-off line has a third projected distance relative to the reference plane; and a fourth radiation diffusion surface extends from the edge of a fourth horn opening in a front-to-back direction toward the throat. The fourth radiation diffusion surface has a fourth central cut-off line that passes through the center of the edge of the fourth horn opening and the center of the throat, and the fourth central cut-off line has a fourth projected distance relative to the reference plane. The first projection distance, the second projection distance, the third projection distance, and the fourth projection distance are all different from each other.

9. The front cover as described in claim 8, wherein, The first horn opening edge and the second horn opening edge are opposite to each other, and the first horn opening edge is closer to the inner ring area, while the second horn opening edge is closer to the edge of the speaker housing; the third horn opening edge and the fourth horn opening edge are opposite to each other and are respectively connected to the first horn opening edge and the second horn opening edge.

10. The front cover as described in claim 9, wherein, In two adjacent waveguide horns, the third radiation diffusion surface of one waveguide horn corresponds to the fourth radiation diffusion surface of the other waveguide horn, and the third projection distance of the aforementioned waveguide horn is greater than the fourth projection distance of the other waveguide horn.

11. The front cover as described in claim 9, wherein, The edges of the first and second horn openings are rounded.

12. The front cover as described in claim 9 or 10, wherein, All waveguide horns have the same shape configuration as each other.

13. The front cover as described in claim 9 or 10, wherein, All waveguide horns have different shapes and configurations.

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