Annular microphone array for voiceprint collection
By introducing a separate noise reduction sound guide plate and a rotary cleaner into the ring microphone array, the problems of mutual interference and background noise influence between the microphones in the ring microphone array are solved, and the efficient noise reduction acquisition effect of soundprints is achieved.
Patent Information
- Application Number
- CN202510062336.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-04-29
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing ring microphone arrays are prone to mutual interference when multiple microphone units capture sound signals at the same time, resulting in aliasing and distortion of sound signals. At the same time, the ring array is highly sensitive to background noise, affecting the sound capture effect.
A ring microphone array is designed, including a ring mount, voiceprint acquisition array assembly, a partitioned noise reduction sound guide, a voiceprint collector and a rotary cleaner. The noise reduction and noise reduction processing of the partitioned noise reduction sound guide reduces interference between the microphones and keeps the soundprint collector clean through a rotary cleaner.
It effectively reduces mutual interference between microphones, improves the quality and signal-to-noise ratio of voiceprint acquisition, reduces the impact of background noise, and achieves efficient noise reduction acquisition of voiceprints.
Smart Images
Figure CN119906923A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of microphones, and in particular to a ring-shaped microphone array for voiceprint collection. Background Art
[0002] A microphone is a device that converts sound into electrical signals. It is used to capture sound and convert it into electrical signals for transmission, processing or recording. A microphone is a sensor that converts acoustic energy into electrical energy. Sound waves cause vibrations through the diaphragm of the microphone (or other sound receiving elements), which in turn generates changing electrical signals. Microphones are widely used in various fields, including audio recording, communications, audio amplification, speech recognition, conference systems, etc. According to different working principles and application scenarios, microphones can be divided into different types such as dynamic microphones, capacitive microphones, and electromagnetic microphones. In order to improve the effect of voiceprint collection, the microphone array will be optimized, including the ring microphone array. The ring microphone array is a special type of microphone arrangement that arranges multiple microphones together along a ring to capture and process sound signals. This array is designed to achieve the functions of multi-directional sound collection and sound source localization.
[0003] However, the existing annular array microphone has the following problems during use: when multiple microphone units simultaneously capture sound signals in a close annular structure, mutual interference between the microphones may occur, resulting in aliasing and distortion of the sound signals. In addition, although the annular array microphone can effectively improve the effect of voiceprint collection, it also increases the background noise in the environment, affecting the sound capture effect of the annular microphone array. Therefore, it is necessary to design corresponding technical solutions to solve the existing technical problems. Summary of the invention
[0004] The purpose of the present invention is to provide a circular microphone array for voiceprint collection, which solves the technical problem that when multiple microphone units simultaneously capture sound signals in a close circular structure, mutual interference between microphones may occur, resulting in aliasing and distortion of sound signals. In addition, although the circular array microphone can effectively improve the effect of voiceprint collection, it also increases the background noise in the environment and affects the sound capture effect of the circular microphone array.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a ring-shaped microphone array for voiceprint collection, comprising a ring-shaped mounting frame, a voiceprint collection array component, a separated noise reduction sound guide plate, a voiceprint collector and a rotary cleaner, the ring-shaped mounting frame comprising a positioning mounting ring and a support frame fixed to the bottom of the positioning mounting ring, the inner side of the positioning mounting ring is provided with a plurality of groups of mounting openings and a sound insulation baffle is installed on the back, a notch begins in the middle of the sound insulation baffle, the voiceprint collection array component is composed of a plurality of groups of microphones, the plurality of groups of microphones are distributed in a ring shape and are respectively installed in a plurality of groups of mounting openings, the separated noise reduction sound guide plate is installed on the outer side of the positioning mounting ring and comprises a hollow sound guide plate and a through opening opened in the middle of the hollow sound guide plate, the hollow sound guide plate An inner cavity is formed inside, several groups of noise reduction baffles are evenly distributed inside the inner cavity, a sound amplification cavity is formed between two adjacent groups of noise reduction baffles, a sound inlet is formed at the inner end of the sound amplification cavity and a sound outlet is formed at the outer end, several groups of bayonet holes are formed on the edge of the hollow sound guide plate, the microphone is embedded in the bayonet hole and the end is inserted into the sound outlet, the voiceprint collector is installed in the slot and inserted into the through hole, the voiceprint collector includes an outer cover, a connecting ring and a sound guide ring, the surface of the outer cover is formed with several groups of sound guide holes and the bottom is connected to the sound guide ring through a connecting ring, the edge of the sound guide ring is formed with several groups of docking interfaces, several groups of the docking interfaces are distributed in a one-to-one correspondence with several groups of sound inlets, and the rotary cleaner is installed in the voiceprint collector.
[0006] As a preferred embodiment of the present invention, the bayonet has an arc-shaped structure and a diameter that is the same as that of the microphone. The inner side of the bayonet is wrapped with a sealing gasket, and the sealing gasket is in contact with the microphone.
[0007] As a preferred embodiment of the present invention, the noise reduction partition includes a partition plate and two groups of noise reduction pads distributed on both sides of the partition plate, and the noise reduction pads are made of sound insulation material.
[0008] As a preferred embodiment of the present invention, the inner end spacing between two adjacent groups of the noise reduction partitions is smaller than the outer end spacing, and the inner end height of the noise reduction partition is smaller than the outer end height.
[0009] As a preferred embodiment of the present invention, the rotary cleaner includes a motor, a driving gear, a driven ring and a cleaning plate. The power output end of the motor is connected to the driving gear. The surface of the driven ring is machined to have a plurality of groups of latch teeth, which are meshed with the driving gear. The driven ring is rotatably arranged in the connecting ring, and the cleaning plate is mounted on the driven ring.
[0010] As a preferred embodiment of the present invention, the cleaning plate includes a curved plate and a plurality of cleaning brushes formed on the surface of the curved plate. The curved plate is attached to the inner side of the outer cover. The cleaning brushes are needle-shaped and made of flexible material.
[0011] As a preferred embodiment of the present invention, the curvature of the arc plate is the same as the curvature of the inner wall of the outer cover, an outer sleeve is fixed to the upper end of the arc plate, a ball is rotatably embedded in the outer sleeve, and the top of the ball is fixed at the center of the outer cover.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] 1. The present invention designs a ring-shaped microphone array structure for collecting voiceprints, which includes a ring-shaped mounting frame, a voiceprint collection array component, a separated noise reduction sound guide plate, a voiceprint collector and a rotating cleaner. The voiceprint collection array component is distributed in a ring shape on the ring-shaped mounting frame. The user speaks and the voiceprint is collected by the voiceprint collector, and the voiceprint is amplified and processed by the separated noise reduction sound guide plate and noise reduction sound guide, and then transmitted to the voiceprint collection array component. The voiceprint is collected and amplified by each microphone, thereby achieving the purpose of efficient noise reduction collection of the voiceprint. In addition, the voiceprint collector can be cleaned by the rotating cleaner to ensure the collection effect of the voiceprint collector on the voiceprint.
[0014] 2. The annular microphone array structure designed in the present invention uses an annular array to efficiently collect voiceprints, and can achieve the purpose of noise reduction and sound amplification during the collection process, thereby improving the effect of voiceprint collection. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is the overall split state structure diagram of the present invention;
[0016] Figure 2 This is a cross-sectional view of the separated noise reduction sound guide plate of the present invention;
[0017] Figure 3 This is a distribution structure diagram of two adjacent groups of noise reduction partitions of the present invention;
[0018] Figure 4 This is a structural diagram of the voiceprint collector of the present invention;
[0019] Figure 5 This is a structural diagram of the rotary cleaner described in the present invention.
[0020] In the figure: 1. positioning and mounting ring; 2. supporting frame; 3. mounting opening; 4. sound insulation baffle; 5. notch; 6. microphone; 7. hollow sound guide plate; 8. through-opening; 9. inner cavity; 10. noise reduction baffle; 11. sound amplification cavity; 12. sound inlet; 13. sound outlet; 14. bayonet; 15. outer cover; 16. connecting ring; 17. sound guide ring; 18. sound guide hole; 19. docking port; 20. sealing gasket; 21. partition plate; 22. noise reduction pad; 23. motor; 24. driving gear; 25. driven ring; 26. cleaning plate; 27. latch; 28. arc plate; 29. cleaning brush; 30. outer cover; 31. ball bearing. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0022] See also Figure 1-5 The present invention provides a technical solution: a ring-shaped microphone array for voiceprint collection, comprising a ring-shaped mounting frame, a voiceprint collection array component, a separated noise reduction sound guide plate, a voiceprint collector and a rotary cleaner, the ring-shaped mounting frame comprising a positioning mounting ring 1 and a support frame 2 fixed to the bottom of the positioning mounting ring 1, a plurality of groups of mounting openings 3 are opened on the inner side of the positioning mounting ring 1 and a sound insulation baffle 4 is installed on the back, a notch 5 is formed in the middle of the sound insulation baffle 4, the voiceprint collection array component is composed of a plurality of groups of microphones 6, the plurality of groups of microphones 6 are distributed in a ring shape and are respectively installed in the plurality of groups of mounting openings 3, the separated noise reduction sound guide plate is installed on the outer side of the positioning mounting ring 1 and comprises a hollow sound guide plate 7 and a through hole 8 opened in the middle of the hollow sound guide plate 7, an inner cavity 9 is formed inside the hollow sound guide plate 7, and the inner cavity 9 There are several groups of noise reduction baffles 10 evenly distributed on the inside, and a sound expansion cavity 11 is formed between two adjacent groups of noise reduction baffles 10. The inner end of the sound expansion cavity 11 is formed with a sound inlet 12 and the outer end is formed with a sound outlet 13. The edge of the hollow sound guide plate 7 is processed to form several groups of bayonet holes 14. The microphone 6 is embedded in the bayonet hole 14 and the end is inserted into the sound outlet 13. The voiceprint collector is installed in the slot 5 and inserted into the through hole 8. The voiceprint collector includes an outer cover 15, a connecting ring 16 and a sound guide ring 17. The surface of the outer cover 15 is processed to form several groups of sound guide holes 18 and the bottom is connected to the sound guide ring 17 through the connecting ring 16. The edge of the sound guide ring 17 is processed to form several groups of docking interfaces 19. The several groups of docking interfaces 19 are distributed one-to-one with the several groups of sound inlets 12, and a rotary cleaner is installed in the voiceprint collector.
[0023] Further improvement, such as Figure 1As shown, the bayonet 14 has an arc-shaped structure and its diameter is the same as that of the microphone 6 . The inner side of the bayonet 14 is wrapped with a sealing gasket 20 , which is in contact with the microphone 6 to improve the sealing degree of the contact portion between the microphone 6 and the hollow sound guide plate 7 .
[0024] Further improvement, such as Figure 3 As shown, the noise reduction partition 10 includes a partition plate 21 and two groups of noise reduction pads 22 distributed on both sides of the partition plate 21. The noise reduction pads 22 are made of sound insulation material to reduce the impact of noise in the external environment.
[0025] Further improvement, such as Figure 3 As shown, the inner end spacing of two adjacent groups of noise reduction baffles 10 is smaller than the outer end spacing, and the inner end height of the noise reduction baffle 10 is smaller than the outer end height. This design method facilitates the amplification of the soundprint and improves the microphone's reception effect on the soundprint.
[0026] Further improvement, such as Figure 4 and 5 As shown, the rotary cleaner includes a motor 23, a driving gear 24, a driven ring 25 and a cleaning plate 26. The power output end of the motor 23 is connected to the driving gear 24. The surface of the driven ring 25 is processed to have a plurality of groups of latch teeth 27. The latch teeth 27 are engaged with the driving gear 24. The driven ring 25 is rotatably arranged in the connecting ring 16. The cleaning plate 26 is installed on the driven ring 25. The driving gear 24 is driven to rotate by the motor 23. The driving gear 24 drives the driven ring 25 to rotate during the rotation. The driven ring 25 drives the cleaning plate 26 to rotate and clean the dust and saliva that may exist in the sound guide hole 18 on the outer cover 15.
[0027] Further improvement, such as Figure 5 As shown, the cleaning plate 26 includes an arc-shaped plate 28 and a plurality of cleaning brushes 29 formed on the surface of the arc-shaped plate 28. The arc-shaped plate 28 is attached to the inner side of the outer cover 15. The cleaning brush 29 is a needle-shaped structure and is made of a flexible material. The rotation of the arc-shaped plate 28 can drive the cleaning brush 29 to clean the sound guide hole 18 on the outer cover 15.
[0028] Specifically, the curvature of the arc plate 28 is the same as the curvature of the inner wall of the outer cover 15. A sleeve 30 is fixed to the upper end of the arc plate 28. A ball 31 is rotatably embedded in the sleeve 30. The top of the ball 31 is fixed at the center of the outer cover 15. This design makes it easy for the arc plate 28 to rotate around the ball 31 and to perform rotational cleaning on the dirt on the surface of the outer cover 15 during the rotation.
[0029] During use: When the user collects the voiceprint, the sound is introduced from the outer cover 15 and along the docking port 19 into the sound inlet 12, and the sound enters the sound amplification cavity 11 through the sound inlet 12 to amplify the voiceprint. At the same time, the noise interference in the external environment is reduced by the noise reduction baffle 10, and the amplified soundprint is introduced into the microphone 6 through the sound outlet 13, and the sound is acquired and amplified by the microphone 6 to achieve the purpose of efficient noise reduction acquisition of the voiceprint. In addition, during the use of the device, when there is saliva or dust on the surface of the outer cover 15, the motor 23 drives the driving gear 24 to rotate, and the driving gear 24 drives the driven ring 25 to rotate during the rotation, and the driven ring 25 drives the cleaning plate 26 to rotate and then clean the dust and saliva that may exist in the sound guide hole 18 on the outer cover 15 to ensure the acquisition effect of the voiceprint.
[0030] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0031] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.
[0032] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.
[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A ring microphone array for voiceprint collection, characterized in that: The invention comprises an annular mounting frame, a soundprint collection array component, a partitioned noise reduction sound guide plate, a soundprint collector and a rotary cleaner. The annular mounting frame comprises a positioning mounting ring (1) and a support frame (2) fixed to the bottom of the positioning mounting ring (1). The inner side of the positioning mounting ring (1) is provided with a plurality of mounting openings (3) and a sound insulation baffle (4) is installed on the back side. A notch (5) begins at the middle of the sound insulation baffle (4). The soundprint collection array component is composed of a plurality of microphones (6). The plurality of microphones (6) are distributed in an annular shape and are respectively installed in the plurality of mounting openings (3). The partitioned noise reduction sound guide plate is installed on the outer side of the positioning mounting ring (1) and comprises a hollow sound guide plate (7) and a through opening (8) opened in the middle of the hollow sound guide plate (7). An inner cavity (9) is formed inside the hollow sound guide plate (7). A plurality of noise reduction baffles (10) are evenly distributed inside the inner cavity (9). The adjacent two groups of microphones (6) are arranged in a circular shape. A sound amplification cavity (11) is formed between the noise reduction baffles (10), a sound inlet (12) is formed at the inner end of the sound amplification cavity (11) and a sound outlet (13) is formed at the outer end, the edge of the hollow sound guide plate (7) is processed to form a plurality of groups of bayonet holes (14), the microphone (6) is embedded in the bayonet holes (14) and the end thereof is inserted into the sound outlet (13), the voiceprint collector is installed in the slot (5) and inserted into the through hole (8), and the voiceprint collector The device comprises an outer cover (15), a connecting ring (16) and a sound guide ring (17); the surface of the outer cover (15) is processed to form a plurality of groups of sound guide holes (18), and the bottom is connected to the sound guide ring (17) through the connecting ring (16); the edge of the sound guide ring (17) is processed to form a plurality of groups of docking ports (19); the plurality of groups of docking ports (19) are distributed in a one-to-one correspondence with the plurality of groups of sound inlets (12); and the rotary cleaner is installed in the voiceprint collector.
2. The annular microphone array for voiceprint collection according to claim 1, characterized in that: The bayonet (14) is in an arc-shaped structure and has a diameter that is the same as that of the microphone (6); a sealing gasket (20) is wrapped inside the bayonet (14), and the sealing gasket (20) is in contact with the microphone (6).
3. The annular microphone array for voiceprint collection according to claim 1, characterized in that: The noise reduction partition (10) comprises a partition plate (21) and two groups of noise reduction pads (22) distributed on both sides of the partition plate (21), and the noise reduction pads (22) are made of sound insulation material.
4. The annular microphone array for voiceprint collection according to claim 3, characterized in that: The inner end spacing between two adjacent groups of the noise reduction partitions (10) is smaller than the outer end spacing, and the inner end height of the noise reduction partition (10) is smaller than the outer end height.
5. The annular microphone array for voiceprint collection according to claim 1, characterized in that: The rotary cleaner comprises a motor (23), a driving gear (24), a driven ring (25) and a cleaning plate (26); the power output end of the motor (23) is connected to the driving gear (24); a plurality of groups of latch teeth (27) are machined on the surface of the driven ring (25); the latch teeth (27) are meshed with the driving gear (24); the driven ring (25) is rotatably arranged in a connecting ring (16); and the cleaning plate (26) is mounted on the driven ring (25).
6. The annular microphone array for voiceprint collection according to claim 5, characterized in that: The cleaning plate (26) comprises a curved plate (28) and a plurality of cleaning brushes (29) formed on the surface of the curved plate (28); the curved plate (28) is attached to the inner side of the outer cover (15); and the cleaning brushes (29) are needle-shaped and made of flexible material.
7. The annular microphone array for voiceprint collection according to claim 6, characterized in that: The curvature of the arc plate (28) is the same as the curvature of the inner wall of the outer cover (15). A sleeve (30) is fixed to the upper end of the arc plate (28). A ball (31) is rotatably embedded in the sleeve (30). The top of the ball (31) is fixed at the center of the outer cover (15).