An in-ear earphone with a front cavity acoustic waveguide structure

Abstract

The application discloses an in-ear earphone with a front cavity acoustic waveguide structure, which comprises a shell with a sound outlet and a sound generating unit arranged in the shell; an inner wall of the shell is provided with an acoustic waveguide structure, which comprises a central sound collecting part, a left sound collecting part and a right sound collecting part arranged on both sides of the central sound collecting part; the central sound collecting part forms a central sound collecting area, the left sound collecting part forms a plurality of left sound collecting areas, and the right sound collecting part forms a plurality of right sound collecting areas; the central sound collecting area, the left sound collecting areas and the right sound collecting areas extend to the sound outlet; a directional channel is formed through the acoustic waveguide structure, a sound wave propagation path is corrected, sound waves at different positions can reach ear canals in a same dimension, listening effect is improved, energy loss of the sound waves in transmission is reduced, and sound quality stability is improved.

Description

Technical Field

[0001] This invention relates to the field of headphone technology, and more particularly to an in-ear headphone with a front cavity acoustic waveguide structure. Background Technology

[0002] In the field of headphone acoustic design, in-ear headphones have become the mainstream product in the consumer electronics market due to their advantages in stable fit and noise isolation. Their acoustic performance relies on the synergistic effect of the acoustic system composed of the driver unit, the front cavity, and the ear canal. Among them, the front cavity is the key propagation path for sound waves from the driver unit to the ear canal, and its structural design directly affects the sound quality performance.

[0003] To meet ergonomic requirements, current in-ear headphones often employ irregularly shaped front chambers. While this design improves wearing comfort, it presents significant acoustic drawbacks: the sound waves emitted by the driver unit propagate as spherical waves, and due to the irregular front chamber, the direction of sound wave propagation to the user's ear canal is noticeably inconsistent. This directional difference leads to a disordered sound field and poor sound quality, failing to meet the needs of usage scenarios requiring high sound field consistency.

[0004] Therefore, it is necessary to develop an in-ear headphone with a front cavity acoustic waveguide structure to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an in-ear headphone with a front cavity acoustic waveguide structure that provides a consistent sound field.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an in-ear headphone with a front cavity acoustic waveguide structure, comprising: A housing having a sound outlet and a sound-generating unit disposed within the housing; The inner wall of the outer shell is provided with an acoustic waveguide structure, which includes a central sound collecting part, a left sound collecting part and a right sound collecting part located on both sides of the central sound collecting part; The central sound gathering part includes a first central sound gathering wall and a second central sound gathering wall, and a central sound gathering region is formed between the first central sound gathering wall and the second central sound gathering wall. The end of the central sound gathering region extends to the sound outlet. The left sound gathering part includes a plurality of spaced left sound gathering walls. The area between the plurality of left sound gathering walls and the area between the left sound gathering walls and the first central sound gathering wall respectively form a plurality of left sound gathering areas. The end of the left sound gathering area extends to the sound outlet. The right-side sound gathering section includes several spaced-apart right-side sound gathering walls. The areas between the several right-side sound gathering walls and the area between the right-side sound gathering walls and the second central sound gathering wall respectively form multiple right-side sound gathering areas. The end of the right-side sound gathering area extends to the sound outlet. The width of the central acoustic region is greater than the width of either the single left acoustic region or the single right acoustic region.

[0007] Furthermore, the distance between the two ends of the first central acoustic barrier and the second central acoustic barrier is smaller than the distance between the middle positions of the first central acoustic barrier and the second central acoustic barrier.

[0008] Furthermore, the distance between the ends of the first central sound-gathering wall and the second central sound-gathering wall that originate from the edge of the front shell is greater than the distance between the ends of the first central sound-gathering wall and the second central sound-gathering wall that extend to the sound outlet.

[0009] Furthermore, the heights of the first central acoustic barrier and the second central acoustic barrier gradually increase as they extend toward the sound outlet.

[0010] Furthermore, the left-side sound-gathering wall includes a first left-side sound-gathering wall, which is located outside the first central sound-gathering wall and forms a first left-side sound-gathering area with the first central sound-gathering wall. The length of the first left-side sound-gathering wall is less than the length of the first central sound-gathering wall, and the distance between the top of the first left-side sound-gathering wall and the first central sound-gathering wall gradually narrows as it extends toward the sound outlet.

[0011] Furthermore, the left-side acoustic wall includes a second left-side acoustic wall, which is located outside the first left-side acoustic wall and forms a second left-side acoustic region with the first left-side acoustic wall. The length of the second left-side acoustic wall is greater than the length of the first left-side acoustic wall. The distance between the top of the second left-side acoustic wall and the first center acoustic wall and the first left-side acoustic wall gradually narrows as it extends towards the sound outlet, extending to the bottom of the first left-side acoustic wall.

[0012] Furthermore, the heights of the first left-side sound-gathering wall and the second left-side sound-gathering wall gradually increase as they extend toward the sound outlet.

[0013] Furthermore, the right-side sound gathering part includes a first right-side sound gathering wall, which is located outside the second central sound gathering wall and forms a first right-side sound gathering area between it and the second central sound gathering wall. The length of the first right-side sound gathering wall is less than the length of the second central sound gathering wall, and the distance between it and the second central sound gathering wall gradually narrows as it extends towards the sound outlet.

[0014] Furthermore, the right-side sound-gathering part includes a second right-side sound-gathering wall, which is located outside the first right-side sound-gathering wall and forms a second right-side sound-gathering area with the first right-side sound-gathering wall. The length of the second right-side sound-gathering wall is greater than the length of the first right-side sound-gathering wall. The distance between the second right-side sound-gathering wall and the first right-side sound-gathering wall and the second center sound-gathering wall gradually narrows as it extends towards the sound outlet. The end of the second right-side sound-gathering wall extends to the bottom of the first right-side sound-gathering wall.

[0015] Furthermore, the heights of the first right-side sound-gathering wall and the second right-side sound-gathering wall gradually increase as they extend toward the sound outlet.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention is an in-ear headphone with a front cavity acoustic waveguide structure, which has the characteristic of consistent sound field. The acoustic waveguide structure forms a directional channel, corrects the sound wave propagation path, and enables sound waves from different positions to reach the ear canal in the same dimension, thereby improving the listening effect, reducing the energy loss of sound waves in transmission, and improving the stability of sound quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of an in-ear headphone with a front cavity acoustic waveguide structure according to the present invention. Figure 2 for Figure 1 An exploded view of an in-ear headphone with a front cavity acoustic waveguide structure is shown. Figure 3 for Figure 1 The diagram shows the front shell and acoustic waveguide structure of an in-ear headphone with a front cavity acoustic waveguide structure. Figure 4 for Figure 3 A partial schematic diagram of the acoustic waveguide structure of an in-ear headphone with a front cavity acoustic waveguide structure is shown. Figure 5 for Figure 3 Another partial schematic diagram of the acoustic waveguide structure of an in-ear headphone with a front cavity acoustic waveguide structure is shown.

[0019] In the diagram: 1. Outer shell; 11. Front shell; 12. Rear shell; 13. Front cavity; 14. Rear cavity; 15. Sound outlet; 16. Partition mesh; 2. Sound generating unit; 3. Acoustic waveguide structure; 31. Central sound collecting section; 311. First central sound collecting wall; 312. Second central sound collecting wall; 313. Central sound collecting area; 32. Left sound collecting section; 321. First left sound collecting wall; 3201. First left sound collecting area; 322. Second left sound collecting wall; 3202. Second left sound collecting area; 323. Third left sound collecting wall; 3203. Third left sound collecting area Regions; 324, Fourth Left Acoustic Wall; 3204, Fourth Acoustic Area; 325, Fifth Left Acoustic Wall; 3205, Fifth Acoustic Area; 33, Right Acoustic Section; 331, First Right Acoustic Wall; 3301, First Right Acoustic Area; 332, Second Right Acoustic Wall; 3302, Second Right Acoustic Area; 333, Third Right Acoustic Wall; 3303, Third Right Acoustic Area; 334, Fourth Right Acoustic Wall; 3304, Fourth Right Acoustic Area; 335, Fifth Right Acoustic Wall; 3305, Fifth Right Acoustic Area. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of the in-ear headphone with a front cavity acoustic waveguide structure proposed according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] The following description, in conjunction with the accompanying drawings, details the specific solution of the in-ear headphone with a front cavity acoustic waveguide structure provided by the present invention.

[0023] Please refer to Figures 1 to 5 The present invention is an in-ear headphone with a front cavity acoustic waveguide structure, which includes a shell 1 and a sound-generating unit 2 disposed in the shell 1.

[0024] Please refer to Figures 1 to 2 The outer shell 1 includes a front shell 11 and a rear shell 12, which are assembled to form a complete outer shell 1. The front shell 11 forms a front cavity 13, and the rear shell 12 forms a rear cavity 14. The front cavity 13 and the rear cavity 14 are connected, and the sound-generating unit 2 is disposed in the front cavity 13 and the rear cavity 14.

[0025] The shape of the front shell 11 matches the shape of the human ear canal, and it has a sound outlet 15 with a mesh 16 installed at the sound outlet 15.

[0026] Please refer to Figure 3 The front cavity 13 is equipped with an acoustic waveguide structure 3.

[0027] The acoustic waveguide structure 3 includes a central sound collecting section 31, a left sound collecting section 32 located on one side of the central sound collecting section 31, and a right sound collecting section 33 located on the other side of the central sound collecting section 31.

[0028] The central sound gathering section 31 includes a first central sound gathering wall 311 and a second central sound gathering wall 312. The first central sound gathering wall 311 and the second central sound gathering wall 312 are arranged opposite to each other and are both located on the inner wall of the front shell 11. Specifically, one end of the first central sound gathering wall 311 and the second central sound gathering wall 312 starts from the connection between the front shell 11 and the rear shell 12, and the other end extends along the inner wall of the front shell 11 to the sound outlet 15. The central sound gathering area 313 is formed between the first central sound gathering wall 311 and the second central sound gathering wall 312.

[0029] Furthermore, the distance between the two ends of the first central sound-gathering wall 311 and the second central sound-gathering wall 312 is smaller than the distance between the middle positions of the first central sound-gathering wall 311 and the second central sound-gathering wall 312; the distance between the ends of the first central sound-gathering wall 311 and the second central sound-gathering wall 312 starting from the connection between the front shell 11 and the rear shell 12 is greater than the distance between the ends of the first central sound-gathering wall 311 and the second central sound-gathering wall 312 extending to the sound outlet 15.

[0030] Furthermore, the heights of the first central sound-gathering wall 311 and the second central sound-gathering wall 312 gradually increase as they extend toward the sound outlet 15.

[0031] Please refer to Figure 4 The left sound collecting part 32 includes a first left sound collecting wall 321, which is located outside the first central sound collecting wall 311. A first left sound collecting area 3201 is formed between the first left sound collecting wall 321 and the first central sound collecting wall 311. The top of the first left sound collecting wall 321 starts at the connection between the front shell 11 and the rear shell 12, and its end extends toward the sound outlet 15.

[0032] Specifically, the length of the first left-side sound-gathering wall 321 is less than the length of the first central sound-gathering wall 311, and the distance between the top of the first left-side sound-gathering wall 321 and the first central sound-gathering wall 311 gradually narrows as it extends toward the sound outlet 15; secondly, the height of the first left-side sound-gathering wall 321 gradually increases as it extends toward the sound outlet 15.

[0033] The left sound collecting part 32 includes a second left sound collecting wall 322, which is located outside the first left sound collecting wall 321. A second left sound collecting area 3202 is formed between the second left sound collecting wall 322 and the first left sound collecting wall 321. The top of the second left sound collecting wall 322 starts from the connection between the front shell 11 and the rear shell 12, and its end extends toward the sound outlet 15.

[0034] Specifically, the length of the second left acoustic wall 322 is greater than the length of the first left acoustic wall 321. The distance between the top of the second left acoustic wall 322 and the first central acoustic wall 311 and the first left acoustic wall 321 gradually narrows as it extends toward the sound outlet 15. The end of the second left acoustic wall 322 extends to the bottom of the first left acoustic wall 321 and is closer to the sound outlet 15 than the first left acoustic wall 321. Secondly, the height of the second left acoustic wall 322 gradually increases as it extends toward the sound outlet 15.

[0035] The left sound collecting part 32 includes a third left sound collecting wall 323, which is located outside the second left sound collecting wall 322. The third left sound collecting area 3203 is formed between the third left sound collecting wall 323 and the second left sound collecting wall 322. The top of the third left sound collecting wall 323 is close to the connection between the front shell 11 and the rear shell 12, and its end extends toward the sound outlet 15.

[0036] Specifically, the length of the third left sound-gathering wall 323 is less than the length of the second left sound-gathering wall 322, and the distance between the top of the third left sound-gathering wall 323 and the second left sound-gathering wall 322 gradually narrows as it extends toward the sound outlet 15; secondly, the height of the third left sound-gathering wall 323 gradually increases as it extends toward the sound outlet 15.

[0037] The left sound collecting part 32 includes a fourth left sound collecting wall 324, which is located outside the third left sound collecting wall 323. A fourth sound collecting area 3204 is formed between the fourth left sound collecting wall 324 and the third left sound collecting wall 323. The top of the fourth left sound collecting wall 324 is close to the connection between the front shell 11 and the rear shell 12, and its end extends toward the sound outlet 15.

[0038] Specifically, the length of the fourth left acoustic wall 324 is greater than the length of the third left acoustic wall 323. The distance between the top of the fourth left acoustic wall 324 and the second left acoustic wall 322 and the third left acoustic wall 323 gradually narrows as it extends towards the sound outlet 15. The end of the fourth left acoustic wall 324 extends to the bottom of the third left acoustic wall 323 and is closer to the sound outlet 15 than the third left acoustic wall 323. Secondly, the height of the fourth left acoustic wall 324 gradually increases as it extends towards the sound outlet 15.

[0039] The left sound collecting part 32 includes a fifth left sound collecting wall 325, which is located outside the fourth left sound collecting wall 324. A fifth sound collecting area 3205 is formed between the fifth left sound collecting wall 325 and the fourth left sound collecting wall 324. The fifth left sound collecting wall 325 is close to the connection between the front shell 11 and the rear shell 12, and its end extends toward the sound outlet 15.

[0040] Specifically, the length of the fifth left acoustic wall 325 is less than the length of the fourth left acoustic wall 324, and the distance between the top of the fifth left acoustic wall 325 and the fourth left acoustic wall 324 gradually narrows as it extends toward the sound outlet 15; secondly, the height of the fifth left acoustic wall 325 gradually increases as it extends toward the sound outlet 15.

[0041] Please refer to Figure 5 The right-side sound collecting part 33 includes a first right-side sound collecting wall 331, which is located outside the second central sound collecting wall 312. The first right-side sound collecting area 3301 is formed between the first right-side sound collecting wall 331 and the second central sound collecting wall 312. The top of the first right-side sound collecting wall 331 starts at the connection between the front shell 11 and the rear shell 12, and its end extends toward the sound outlet 15.

[0042] Specifically, the length of the first right-side sound-gathering wall 331 is less than the length of the second central sound-gathering wall 312, and the distance between the top of the first right-side sound-gathering wall 331 and the second central sound-gathering wall 312 gradually narrows as it extends toward the sound outlet 15; secondly, the height of the first right-side sound-gathering wall 331 gradually increases as it extends toward the sound outlet 15.

[0043] The right-side sound collecting part 33 includes a second right-side sound collecting wall 332, which is located outside the first right-side sound collecting wall 331. A second right-side sound collecting area 3302 is formed between the second right-side sound collecting wall 332 and the first right-side sound collecting wall 331. The top of the second right-side sound collecting wall 332 starts from the connection between the front shell 11 and the rear shell 12, and its end extends toward the sound outlet 15.

[0044] Specifically, the length of the second right-side acoustic wall 332 is greater than the length of the first right-side acoustic wall 331. The distance between the top of the second right-side acoustic wall 332 and the first right-side acoustic wall 331 and the second central acoustic wall 312 gradually narrows as it extends towards the sound outlet 15. The end of the second right-side acoustic wall 332 extends to the bottom of the first right-side acoustic wall 331 and is closer to the sound outlet 15 than the first right-side acoustic wall 331. Secondly, the height of the second right-side acoustic wall 332 gradually increases as it extends towards the sound outlet 15.

[0045] The right-side sound collecting part 33 includes a third right-side sound collecting wall 333, which is located outside the second right-side sound collecting wall 332. The third right-side sound collecting area 3303 is formed between the third right-side sound collecting wall 333 and the second right-side sound collecting wall 332. The top of the third right-side sound collecting wall 333 is close to the connection between the front shell 11 and the rear shell 12, and its end extends toward the sound outlet 15.

[0046] Specifically, the length of the third right-side acoustic wall 333 is less than the length of the second right-side acoustic wall 332, and the distance between the top of the third right-side acoustic wall 333 and the second right-side acoustic wall 332 gradually narrows as it extends towards the sound outlet 15; secondly, the height of the third right-side acoustic wall 333 gradually increases as it extends towards the sound outlet 15.

[0047] The right-side sound collecting part 33 includes a fourth right-side sound collecting wall 334, which is located outside the third right-side sound collecting wall 333. The fourth right-side sound collecting area 3304 is formed between the fourth right-side sound collecting wall 334 and the third right-side sound collecting wall 333. The top of the fourth right-side sound collecting wall 334 is close to the connection between the front shell 11 and the rear shell 12, and its end extends toward the sound outlet 15.

[0048] Specifically, the length of the fourth right-side acoustic wall 334 is greater than the length of the third right-side acoustic wall 333. The distance between the top of the fourth right-side acoustic wall 334 and the second right-side acoustic wall 332 and the third right-side acoustic wall 333 gradually narrows as it extends towards the sound outlet 15. The end of the fourth right-side acoustic wall 334 extends to the bottom of the third right-side acoustic wall 333 and is closer to the sound outlet 15 than the third right-side acoustic wall 333. Secondly, the height of the fourth right-side acoustic wall 334 gradually increases as it extends towards the sound outlet 15.

[0049] The right-side sound collecting part 33 includes a fifth right-side sound collecting wall 335, which is located outside the fourth right-side sound collecting wall 334. The fifth right-side sound collecting area 3305 is formed between the fifth right-side sound collecting wall 335 and the fourth right-side sound collecting wall 334. The top of the fifth right-side sound collecting wall 335 is close to the connection between the front shell 11 and the rear shell 12, and its end extends toward the sound outlet 15.

[0050] Specifically, the length of the fifth right-side acoustic wall 335 is less than the length of the fourth right-side acoustic wall 334, and the distance between the top of the fifth right-side acoustic wall 335 and the fourth right-side acoustic wall 334 gradually narrows as it extends towards the sound outlet 15; secondly, the height of the fifth right-side acoustic wall 335 gradually increases as it extends towards the sound outlet 15.

[0051] The width of the central acoustic region 313 is greater than the width of either the single left acoustic region or the single right acoustic region.

[0052] When the present invention provides an in-ear headphone with a front cavity acoustic waveguide structure, the sound-generating unit 2 emits sound in the front cavity 13 and the rear cavity 14. Initially, the sound diffuses in the three-dimensional direction in the form of a spherical wave in the front cavity 13. The central sound collecting part 31, the left sound collecting part 32 and the right sound collecting part 33 form a directional channel, which "gathers" the diffused spherical wave and forces it to be transmitted along the sound collecting area to the sound outlet 15. It is gradually transformed into a cylindrical wave that propagates only in two dimensions. The cylindrical wave enters the ear canal through the sound outlet 15.

[0053] This invention relates to an in-ear headphone with a front cavity acoustic waveguide structure, which features a consistent sound field. The acoustic waveguide structure forms a directional channel, corrects the sound wave propagation path, and allows sound waves from different locations to reach the ear canal in the same dimension, improving the listening effect, reducing energy loss of sound waves during transmission, and enhancing sound quality stability.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An in-ear headphone with a front cavity acoustic waveguide structure, characterized in that, include: A housing (1) having a sound outlet (15) and a sound-generating unit (2) disposed within the housing (1); The inner wall of the outer shell (1) is provided with a sound waveguide structure (3), which includes a central sound collecting part (31), a left sound collecting part (32) located on both sides of the central sound collecting part (31), and a right sound collecting part (33). The central sound gathering part (31) includes a first central sound gathering wall (311) and a second central sound gathering wall (312), and a central sound gathering region (313) is formed between the first central sound gathering wall (311) and the second central sound gathering wall (312), and the end of the central sound gathering region (313) extends to the sound outlet (15). The left sound gathering part (32) includes a number of spaced left sound gathering walls. The area between the number of left sound gathering walls and the area between the left sound gathering walls and the first central sound gathering wall (311) respectively form a number of left sound gathering areas. The end of the left sound gathering area extends to the sound outlet (15). The right-side sound gathering part (33) includes a plurality of spaced-apart right-side sound gathering walls. The area between the plurality of right-side sound gathering walls and the area between the right-side sound gathering walls and the second central sound gathering wall (312) respectively form a plurality of right-side sound gathering areas. The end of the right-side sound gathering area extends to the sound outlet (15). The width of the central acoustic region (313) is greater than the width of the single left acoustic region and the single right acoustic region; The distance between the two ends of the first central sound-gathering wall (311) and the second central sound-gathering wall (312) is smaller than the distance between the middle positions of the first central sound-gathering wall (311) and the second central sound-gathering wall (312).

2. The in-ear headphone with a front cavity acoustic waveguide structure according to claim 1, characterized in that: The distance between the first central sound-gathering wall (311) and the second central sound-gathering wall (312) starting from the edge of the front shell (11) is greater than the distance between the first central sound-gathering wall (311) and the second central sound-gathering wall (312) extending to the sound outlet (15).

3. The in-ear headphone with a front cavity acoustic waveguide structure according to claim 2, characterized in that: The heights of the first central sound-gathering wall (311) and the second central sound-gathering wall (312) gradually increase as they extend toward the sound outlet (15).

4. The in-ear headphone with a front cavity acoustic waveguide structure according to claim 1, characterized in that: The left-side sound-gathering wall includes a first left-side sound-gathering wall (321), which is located outside the first central sound-gathering wall (311) and forms a first left-side sound-gathering area (3201) with the first central sound-gathering wall (311). The length of the first left-side sound-gathering wall (321) is less than the length of the first central sound-gathering wall (311). The distance between the top of the first left-side sound-gathering wall (321) and the first central sound-gathering wall (311) gradually narrows as it extends toward the sound outlet (15).

5. The in-ear headphone with a front cavity acoustic waveguide structure according to claim 4, characterized in that: The left-side acoustic wall includes a second left-side acoustic wall (322), which is located outside the first left-side acoustic wall (321) and forms a second left-side acoustic region (3202) with the first left-side acoustic wall (321). The length of the second left-side acoustic wall (322) is greater than the length of the first left-side acoustic wall (321). The distance between the top of the second left-side acoustic wall (322) and the first central acoustic wall (311) and the first left-side acoustic wall (321) gradually narrows as it extends toward the sound outlet (15) and extends to the bottom of the first left-side acoustic wall (321).

6. The in-ear headphone with a front cavity acoustic waveguide structure according to claim 5, characterized in that: The heights of the first left-side sound-gathering wall (321) and the second left-side sound-gathering wall (322) gradually increase as they extend toward the sound outlet (15).

7. The in-ear headphone with a front cavity acoustic waveguide structure according to claim 1, characterized in that: The right-side sound gathering part (33) includes a first right-side sound gathering wall (331), which is located outside the second central sound gathering wall (312) and forms a first right-side sound gathering area (3301) between it and the second central sound gathering wall (312). The length of the first right-side sound gathering wall (331) is less than the length of the second central sound gathering wall (312), and the distance between it and the second central sound gathering wall (312) gradually narrows as it extends toward the sound outlet (15).

8. The in-ear headphone with a front cavity acoustic waveguide structure according to claim 7, characterized in that: The right-side sound gathering part (33) includes a second right-side sound gathering wall (332), which is located outside the first right-side sound gathering wall (331) and forms a second right-side sound gathering area (3302) with the first right-side sound gathering wall (331). The length of the second right-side sound gathering wall (332) is greater than the length of the first right-side sound gathering wall (331). The distance between the second right-side sound gathering wall (332) and the first right-side sound gathering wall (331) and the second center sound gathering wall (312) gradually narrows as it extends toward the sound outlet (15). The end of the second right-side sound gathering wall (332) extends to the bottom of the first right-side sound gathering wall (331).

9. The in-ear headphone with a front cavity acoustic waveguide structure according to claim 8, characterized in that: The heights of the first right-side sound-gathering wall (331) and the second right-side sound-gathering wall (332) gradually increase as they extend toward the sound outlet (15).

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