A dual-feed over-ear noise-canceling headphone

Abstract

This utility model discloses a dual-feed over-ear noise-canceling headphone, relating to the field of over-ear noise-canceling headphone technology. It includes an earphone shell, with a speaker mounting shell internally connected to it. A speaker is mounted on the right side of the speaker mounting shell, and a silicone pad is attached to the outer side of the speaker mounting shell. A bracket is rotatably connected to the outside of the earphone shell, and an extension bracket is slidably connected to the inner side of the bracket. A noise-canceling component is mounted on the other side of the speaker mounting shell. This dual-feed over-ear noise-canceling headphone uses a feedforward microphone and a feedback microphone to collect external ambient noise and residual noise within the earcups, respectively. The earphone shell also houses a speaker for playing audio signals and processed noise-canceling signals. The headphone includes a noise-canceling control circuit, including a feedforward filter and a feedback filter, which process the noise signals collected by the feedforward and feedback microphones, respectively.

Description

Technical Field

[0001] This utility model relates to the field of headphone noise cancellation technology, specifically a dual-feed headphone noise cancellation headphone. Background Technology

[0002] Over-ear noise-canceling headphones are headphones that can effectively reduce external noise and provide a quiet listening environment. They typically contain a variety of technologies and components to achieve both active and passive noise cancellation. However, traditional over-ear noise-canceling headphones mainly use a single feedforward or feedback noise cancellation technology. Although they can reduce noise to a certain extent, their noise cancellation effect is still limited in complex environmental noise conditions.

[0003] To overcome the aforementioned shortcomings, existing technology (Chinese patent with announcement number CN221329102U, announcement date 2021-04-20) discloses a novel dual-feed active noise cancellation unit assembly, relating to the field of headphone technology. It includes a right rear cover and a left rear cover, with a right speaker and a left speaker respectively disposed inside the right and left rear covers. A right speaker cover and a left speaker cover are respectively disposed on the inner sides of the right and left rear covers, and a right circuit board and a left circuit board are respectively disposed on the outer sides of the right and left rear covers. A right rear-feed microphone and a left rear-feed microphone are respectively disposed at the center of the inner side of the right and left speaker covers. Mounting seats are respectively disposed on the outer periphery of the front of the right and left rear covers. By using a modular design for the overall structure and producing each component in a modular fashion, the assembly into a finished product eliminates the cumbersome production process of the previous integrated structure. The advantage of combining the various components is that the parts can be used in combination, thereby improving product quality and production efficiency, and correspondingly stabilizing the noise cancellation effect of the headphone.

[0004] The aforementioned mechanisms use a feedback microphone to reduce ambient noise. However, in actual use, relying solely on a feedback microphone for noise reduction has limitations in terms of effectiveness, affecting the stability of sound reception during actual use. Utility Model Content

[0005] The purpose of this invention is to provide a dual-feed headphone with noise cancellation, in order to solve the problem mentioned in the background art that traditional headphone with noise cancellation mainly adopts a single feedforward or feedback noise cancellation technology. Although it can reduce noise to a certain extent, the noise cancellation effect is still limited under complex environmental noise conditions.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dual-feed over-ear noise-canceling headphone, comprising a headphone shell, a speaker mounting shell being snapped into the inside of the headphone shell, a speaker body being mounted on the right side of the speaker mounting shell, a silicone pad being snapped into the outside of the speaker mounting shell, a bracket being rotatably connected to the outside of the headphone shell, an extension bracket being slidably connected to the inside of the bracket, and a cable exit stop being installed at the bottom of the headphone shell, with a controller being installed at the bottom of the cable exit stop via a wire; an acoustic filter being installed on the side of the speaker mounting shell near the silicone pad, and a noise-canceling component being installed on the other side of the speaker mounting shell; a microphone boom being snapped into the side of the headphone shell, and a disassembly and assembly mechanism for disassembling the microphone boom being provided on the side of the microphone boom.

[0007] Furthermore, the disassembly and assembly mechanism includes a positioning groove, which is located at the lower end of the outer side of the earphone shell, and a positioning block matching the positioning groove is installed at the lower end of the microphone boom side.

[0008] Furthermore, the earphone shell has a plug slot on the side near the silicone pad, and a plug block that matches the plug slot is fixedly connected to the side of the silicone pad near the earphone shell. The plug block is engaged and connected inside the plug slot.

[0009] Furthermore, the sides of the plug block are chamfered, and the height of the sides of the plug block is less than the height of the inside of the plug slot.

[0010] Furthermore, the bracket is provided with a length adjustment mechanism, which includes a positioning plate and is fixedly connected to the bottom of the extension frame. The bottom of the bracket is provided with a fixing hole, and a connecting spring is fixedly connected inside the fixing hole. A limit block is fixedly connected to the top of the connecting spring, and a limit hole matching the limit block is provided on the surface of the positioning plate.

[0011] Furthermore, the limiting block has a circular cross-section, and the maximum diameter of the limiting block is greater than the diameter of the limiting hole. The limiting block and the fixing hole are connected by a spring to form an elastic structure.

[0012] Furthermore, soft pads are installed on both sides of the bottom end of the extension frame, and the soft pads are symmetrical about the vertical central axis of the extension frame.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The headphones use a feedforward microphone and a feedback microphone to collect external ambient noise and residual noise inside the earcups, respectively. The earcups also have a speaker inside for playing audio signals and processed noise-canceling signals. The headphones have a noise-canceling control circuit inside, including a feedforward filter and a feedback filter, which process the noise signals collected by the feedforward microphone and the feedback microphone, respectively.

[0015] Furthermore, a dual Bluetooth chip circuit is adopted, which reuses the feedforward microphone function in both feedforward noise reduction mode and ambient monitoring mode. This not only enables monitoring function based on a single Bluetooth chip, but also enables dual-feed noise reduction function. The parameters of the feedforward filter and the feedback filter are dynamically adjusted according to different ambient noise characteristics and user wearing conditions to adapt to different noise reduction needs.

[0016] Furthermore, the dual Bluetooth chip circuit not only achieves dual-feed noise cancellation but also retains environmental monitoring capabilities, enhancing the practicality and user experience of the headphones. The design of dynamically adjusting filter parameters allows the headphones to adapt to different environmental noise levels and wearing styles, improving the stability and consistency of noise cancellation. Through dual-feed noise cancellation technology, it can effectively reduce noise across a wider frequency range, especially performing better in low-frequency noise cancellation.

[0017] 2. By pulling the extension frame outward from the inside of the bracket, the positioning plate is simultaneously pulled out from the inside of the bracket. The bracket has fixing holes inside, and when the positioning plate is pulled out, the spring force of the connecting spring causes the limiting block to automatically engage with the appropriately positioned limiting hole. Thus, when the length of the extension frame and the bracket is adjusted, the engagement of the limiting block with the limiting hole limits the extension length of the extension frame, making the headphones suitable for users with different head circumferences.

[0018] Furthermore, the positioning block and positioning groove on the side of the microphone boom engage with each other, allowing the microphone boom to be adjusted in position according to different usage habits. The microphone boom can also be quickly disassembled through the positioning groove and positioning block, making it easy to clean and maintain. Attached Figure Description

[0019] Figure 1 This is a front view structural diagram of the present utility model.

[0020] Figure 2 This is a schematic diagram of the exploded structure of this utility model.

[0021] Figure 3 This is a frontal sectional view of the present invention.

[0022] Figure 4 This is a schematic diagram of the acoustic filter structure of this utility model.

[0023] Figure 5 This is a partially enlarged structural schematic diagram of the length adjustment mechanism of this utility model.

[0024] Figure 6 This is a schematic diagram of the disassembly and assembly mechanism of this utility model.

[0025] In the diagram: 1. Microphone boom; 2. Cable exit stop; 3. Earphone shell; 4. Speaker mounting shell; 5. Speaker; 6. Silicone pad; 7. Stand; 8. Acoustic filter; 9. Positioning slot; 10. Noise reduction assembly; 11. Extension bracket; 12. Fixing hole; 13. Connecting spring; 14. Limiting block; 15. Positioning plate; 16. Limiting hole; 17. Soft pad; 18. Connecting block; 19. Connecting slot; 20. Controller; 21. Positioning block. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1: As Figure 1 , Figure 2 , Figure 3 and Figure 4 The technical solution shown addresses the problem that traditional over-ear noise-canceling headphones mainly use single feedforward or feedback noise cancellation technology, which can reduce noise to a certain extent, but the noise cancellation effect is still limited under complex environmental noise: This dual-feed over-ear noise-canceling headphone discloses a noise cancellation mechanism, including an earphone shell 3, a speaker fixing shell 4 is connected to the inside of the earphone shell 3, and a speaker body 5 is installed on the right side of the speaker fixing shell 4. A silicone pad 6 is connected to the outside of the speaker fixing shell 4. A bracket 7 is rotatably connected to the outside of the earphone shell 3, and an extension bracket 11 is slidably connected to the inside of the bracket 7. A cable outlet 2 is installed at the bottom of the earphone shell 3, and a controller 20 is installed at the bottom of the cable outlet 2 through a wire. An acoustic filter 8 is installed on the side of the speaker fixing shell 4 near the silicone pad 6, and a noise cancellation component 10 is installed on the other side of the speaker fixing shell 4.

[0028] In this example, each earphone shell 3 is equipped with a noise reduction component 10, which includes a feedforward microphone and a feedback microphone, used to collect external ambient noise and residual noise inside the earcups, respectively. The earphone shell 3 also contains a speaker for playing audio signals and processed noise-reduced signals. The earphone contains a noise reduction control circuit, including a feedforward filter and a feedback filter, which process the noise signals collected by the feedforward and feedback microphones, respectively. The feedforward microphone collects external ambient noise signals, which, after processing by the feedforward filter, generate a cancellation signal with the opposite phase to the noise, and is played through the speaker to cancel out the external noise. The feedback microphone collects residual noise signals inside the earphone shell 3, which, after processing by the feedback filter, generate a further cancellation signal, also played through the speaker to eliminate noise inside the earphone shell 3. The synergistic effect of feedforward and post-feedback noise cancellation achieves more comprehensive noise cancellation and improves the noise reduction effect. Utilizing a dual Bluetooth chip circuit, the feedforward microphone function is reused in both feedforward noise cancellation and ambient monitoring modes. This not only enables monitoring functionality on top of a single Bluetooth chip but also achieves dual-feed noise cancellation. The parameters of the feedforward and post-feedback filters are dynamically adjusted according to different environmental noise characteristics and user wearing conditions to adapt to various noise reduction needs. The dual Bluetooth chip circuit not only implements dual-feed noise cancellation but also retains ambient monitoring functionality, enhancing the practicality and user experience of the headphones. The dynamically adjusted filter parameters allow the headphones to adapt to different environmental noise levels and wearing styles, improving the stability and consistency of the noise cancellation effect. Through dual-feed noise cancellation technology, it can effectively reduce noise across a wider frequency range, especially performing better in low-frequency noise cancellation.

[0029] Example 2: Figure 1 , Figure 3 , Figure 5 and Figure 6 The technical solution shown addresses the issue of headphones being unsuitable for users with different head sizes. This dual-feed noise-canceling headphone discloses a length adjustment mechanism. The length adjustment mechanism is housed inside the bracket 7, including a positioning plate 15 fixedly connected to the bottom of the extension frame 11. A fixing hole 12 is installed at the bottom of the bracket 7, and a connecting spring 13 is fixedly connected inside the fixing hole 12. A limit block 14 is fixedly connected to the top of the connecting spring 13, and a limit hole 16 matching the limit block 14 is opened on the surface of the positioning plate 15. The limit block 14 has a circular cross-section, and its maximum diameter is larger than the diameter of the limit hole 16. The limit block 14 and the fixing hole 12 form an elastic structure through the connecting spring 13. Soft pads 17 are installed on both sides of the bottom of the extension frame 11, and the soft pads 17 are symmetrical about the vertical central axis of the extension frame 11.

[0030] In this example, the extension frame 11 is pulled outward from inside the bracket 7. When the extension frame 11 is pulled out, the positioning plate 15 is simultaneously pulled out from inside the bracket 7. The bracket 7 has a fixing hole 12 inside. When the positioning plate 15 is pulled out, the elastic force of the connecting spring 13 causes the limiting block 14 to automatically engage with the appropriately positioned limiting hole 16. This ensures that when the length of the extension frame 11 and the bracket 7 is adjusted, the engagement of the limiting block 14 with the limiting hole 16 limits the extension length of the extension frame 11, making the headphones suitable for users with different head circumferences. The limiting holes 16 are evenly distributed on the surface of the positioning plate 15, so that the extension frame 11 is limited to the same length each time it is pulled out. Furthermore, the cross-section of the limiting block 14 is circular, so that when the positioning plate 15 moves to adjust the engagement position after the limiting block 14 engages with the limiting hole 16, the limiting block 14 will not pass through the limiting hole 16 and become stuck.

[0031] Example 3: Figure 2 The technical solution shown addresses the problem of the microphone boom 1 being inconvenient to disassemble, clean, and maintain during use. This dual-feed headphone for noise cancellation discloses a disassembly and assembly mechanism. The microphone boom 1 is engaged with the side of the headphone shell 3, and a disassembly and assembly mechanism for disassembling the microphone boom 1 is provided on the side of the microphone boom 1. The disassembly and assembly mechanism includes a positioning groove 9, which is located at the lower end of the outer side of the headphone shell 3. A positioning block 21 matching the positioning groove 9 is installed at the lower end of the side of the microphone boom 1. A insertion groove 19 is provided on the side of the headphone shell 3 near the silicone pad 6, and a insertion block 18 matching the insertion groove 19 is fixedly connected to the side of the silicone pad 6 near the headphone shell 3. The insertion block 18 is engaged with the inside of the insertion groove 19. The side of the insertion block 18 is chamfered, and the height of the side of the insertion block 18 is less than the height of the inside of the insertion groove 19.

[0032] In this example, the positioning block 21 on the side of the microphone boom 1 engages with the positioning groove 9, allowing the microphone boom 1 to be adjusted in position according to different usage habits. The microphone boom 1 can also be quickly disassembled through the positioning groove 9 and the positioning block 21, making it easy to clean and maintain. The silicone pad 6 engages with the earphone shell 3 through the plug block 18 and the plug groove 19, allowing the silicone pad 6 to be quickly disassembled and replaced, making it easy to clean, reducing dirt residue, and increasing flexibility during use.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-feed headphone with noise cancellation, comprising a headphone shell (3), wherein a speaker fixing shell (4) is engaged with the inside of the headphone shell (3), and a speaker body (5) is installed on the right side of the speaker fixing shell (4), a silicone pad (6) is engaged with the outside of the speaker fixing shell (4), a bracket (7) is rotatably connected to the outside of the headphone shell (3), and an extension bracket (11) is slidably connected to the inside of the bracket (7), and a cable outlet (2) is installed at the bottom of the headphone shell (3), and a controller (20) is installed at the bottom of the cable outlet (2) through a wire; characterized in that An acoustic filter (8) is installed on the side of the speaker mounting shell (4) near the silicone pad (6), and a noise reduction component (10) is installed on the other side of the speaker mounting shell (4). The earphone shell (3) is fitted with a microphone boom (1) on its side, and the microphone boom (1) is provided with a disassembly and assembly mechanism for disassembling the microphone boom (1) on its side.

2. The dual-feed headphone of claim 1, wherein: The disassembly and assembly mechanism includes a positioning groove (9), and the positioning groove (9) is located at the lower end of the outer side of the earphone shell (3). A positioning block (21) matching the positioning groove (9) is installed at the lower end of the side of the microphone boom (1).

3. The dual-feed headphone of claim 2, wherein: The earphone shell (3) has a plug groove (19) on the side near the silicone pad (6), and a plug block (18) matching the plug groove (19) is fixedly connected to the side of the silicone pad (6) near the earphone shell (3). The plug block (18) is engaged and connected to the inside of the plug groove (19).

4. The dual-feed headphone of claim 3, wherein: The plug block (18) has a chamfer on its side, and the height of the side of the plug block (18) is less than the height of the inside of the plug groove (19).

5. A dual-feed over-ear noise-canceling headphone according to claim 4, characterized in that: The bracket (7) is provided with a length adjustment mechanism, which includes a positioning plate (15) and is fixedly connected to the bottom end of the extension frame (11). The bottom end of the bracket (7) is provided with a fixing hole (12) and a connecting spring (13) is fixedly connected inside the fixing hole (12). The top end of the connecting spring (13) is fixedly connected to a limit block (14), and the surface of the positioning plate (15) is provided with a limit hole (16) that matches the limit block (14).

6. A dual-feed over-ear noise-canceling headphone according to claim 5, characterized in that: The limiting block (14) has a circular cross-section, and the maximum diameter of the limiting block (14) is greater than the diameter of the limiting hole (16). The limiting block (14) and the fixing hole (12) are connected by a spring (13) to form an elastic structure.

7. A dual-feed over-ear noise-canceling headphone according to claim 6, characterized in that: Both sides of the bottom end of the extension frame (11) are equipped with soft pads (17), and the soft pads (17) are symmetrical about the vertical central axis of the extension frame (11).

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