Invisible pickup noise reduction earplug and method

Abstract

The invention relates to an invisible pickup noise reduction earplug and method, and relates to the technical field of noise reduction, the invisible pickup noise reduction earplug comprises a shell, a noise reduction structure, a power supply structure and an invisible pull-out structure; the shell is matched with an ear canal in appearance and is provided with a mounting hole; the noise reduction structure is arranged in the shell and comprises a sound receiving unit, an ARM processing unit and a sound production unit which are electrically connected in sequence; the power supply structure is electrically connected with the ARM processing unit and is used for supplying power to the noise reduction structure; the invisible pull-out structure is mounted at the mounting hole, the invisible pull-out structure comprises a protruding part, and at least part of the protruding part is arranged outside the shell. The device has the effect of being convenient to take out.

Description

Technical Field

[0001] The present application relates to the technical field of noise reduction, and in particular to an invisible sound pickup noise reduction earplug and method. Background Art

[0002] Sound-pickup noise-reducing earplugs are a type of device used to protect hearing in noisy environments such as shooting and hunting. They use a microphone to pick up sounds from the outside environment and play them in the earplugs, attenuating or amplifying specific sounds to protect the user's hearing and maintain the ability to perceive external sounds.

[0003] Sound pickup and noise reduction can reduce noise while allowing users to hear important sound signals, such as human voices and footsteps. It is very practical in military, police, shooting training and other occasions. The original sound pickup and noise reduction earplugs were head-mounted. Although they had good sound pickup and noise reduction effects, they were large in size and easily exposed the user's own location information.

[0004] Therefore, head-mounted earplugs have gradually been improved to in-ear type, which goes deep into the ear canal and has better concealment and sound insulation effect. Especially in police operations, military operations, special mission execution and other situations, there is a high requirement for concealment of sound pickup and noise reduction earplugs, and in-ear sound pickup and noise reduction earplugs have been improved to be smaller and more fit in the ear canal.

[0005] However, in actual use, it is found that since the earplug is hidden in the ear canal, it is difficult to remove the earplug from the ear canal, and there is a problem of inconvenience in removal during use. Summary of the invention

[0006] The purpose of the present application is to provide an invisible sound pickup and noise reduction earplug, which can ensure the sound pickup and noise reduction effect while making it convenient for users to remove the earplug after using the earplug.

[0007] In the first aspect, the present application provides an invisible sound pickup noise reduction earplug adopts the following technical solution: An invisible sound pickup and noise reduction earplug, comprising a shell, a noise reduction structure, a power supply structure and an invisible pull-out structure, wherein the shell shape is adapted to the ear canal and is provided with a mounting hole; the noise reduction structure is arranged in the shell, comprising a sound receiving unit, an ARM processing unit and a sound generating unit which are electrically connected in sequence; The power supply structure is electrically connected to the ARM processing unit and is used to supply power to the noise reduction structure; An invisible pull-out structure is installed at the installation hole, and the invisible pull-out structure includes a protruding portion, and the protruding portion is at least partially disposed outside the shell.

[0008] Furthermore, a charging interface is provided in the housing, and the charging interface is electrically connected to the power supply structure; The charging interface is arranged at the mounting hole; or The shell is provided with a matching hole, and the charging interface partially extends out of the shell through the matching hole.

[0009] Furthermore, the charging interface is arranged at the mounting hole, one end of the invisible pull-out structure can be restored to be arranged at the mounting hole, and the protrusion closes the charging interface when it is tightly attached to the shell.

[0010] Furthermore, the protruding portion has a power button, and the power button is electrically connected to the power supply structure.

[0011] Furthermore, the sound collection unit includes two groups of sound collection microphones, and the two groups of sound collection microphones are electrically connected to the ARM processing unit; Among them, one group of the sound collecting microphones is used to obtain the sound source outside the shell, and one group of the sound collecting microphones is used to obtain the sound source inside the shell.

[0012] Furthermore, a plurality of earplug caps are arranged at one end of the shell, and the plurality of earplug caps are stacked in sequence.

[0013] Furthermore, the shell is wrapped with a flexible protective layer.

[0014] Furthermore, the shell is filled with resonant sound-absorbing material.

[0015] In a second aspect, the present application provides a method for noise reduction by sound pickup, comprising the following steps: S1. Acquire the sound sources inside and outside the shell and convert them into electrical signals, perform low-pass and filtering processing on the acquired sound sources, and retain the sound source data in the frequency band of 200Hz to 4000Hz; S2, set the noise threshold range and process the sound source data directly. ; Adaptive noise reduction processing, ; Partition treatment, ; Where P is the decibel size of the sound source data; S3, performing enhancement processing on the processed sound source data; S4, converting the sound source data from an electrical signal into an electrical signal, and playing the processed sound source data.

[0016] Furthermore, in S2, the isolation process is: disconnecting the connection between the ARM unit and the sound receiving unit and the sound emitting unit.

[0017] In summary, the present application includes at least one of the following beneficial technical effects: 1. The earplug in the present application includes a shell, the shape of which matches the ear canal and can be hidden in the ear canal when worn, with a good invisible effect, and an invisible pull-out structure is provided on the shell. When the earplug needs to be removed, the user can pinch the protrusion and drag the earplug outward, making the use of the earplug more convenient.

[0018] 2. The charging interface in the present application can be arranged at the installation port. When the user removes the earplug through the invisible pull-out structure, the invisible pull-out structure slides / rotates relative to the shell. At this time, the charging interface is no longer blocked by the protrusion, and the user can charge the power supply structure through the charging interface.

[0019] When the earplugs are in use, the mounting holes are closed by the protrusions, which provides better protection for the charging port and prevents dust or dirt from entering the charging port or the shell. It also blocks noise and ensures the noise reduction effect of the earplugs when the mounting holes are opened.

[0020] 3. The noise reduction structure in this application can perform adaptive noise reduction processing in different sound source scenarios, thereby ensuring that users can stably receive effective signals when using earplugs while suppressing noise in the environment, thereby protecting the user's hearing while enhancing the perception and acquisition of important signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the invisible sound pickup and noise reduction earplug in this application; Figure 2 It is a schematic diagram of the internal structure of the invisible sound pickup noise reduction earplug in this application; Figure 3 This is a schematic diagram of the internal structure of another form of invisible sound pickup and noise reduction earplug in the present application; Figure 4 This is a partial structural diagram of the invisible sound pickup and noise reduction earplugs in this application; Figure 5 It is a schematic diagram of the internal structure of other forms of invisible sound pickup and noise reduction earplugs in this application; In the figure, 1. shell; 11. mounting hole; 12. matching hole; 2. noise reduction structure; 3. power supply structure; 31. sound receiving unit; 32. ARM processing unit; 33. sound generating unit; 4. invisible pull-out structure; 41. protrusion; 42. connection part; 5. charging port; 6. power button; 7. earplug cap. DETAILED DESCRIPTION

[0022] The following will be combined with the attached Figure 1-5The technical solution of the present application is described clearly and completely. The following embodiments are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application. In the following description, the same symbols are used to represent the same or equivalent elements, and repeated descriptions are omitted.

[0023] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present application are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present application 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 application.

[0024] In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] It should be further understood that the term “and / or” used in the specification and corresponding claims of this application refers to any and all possible combinations of one or more of the listed items.

[0026] An invisible sound pickup noise reduction earplug, referring to Figure 1 and Figure 2 , including a shell 1, a noise reduction structure 2, a power supply structure 3 and an invisible pull-out structure 4. The shell 1 is adapted to the ear canal. The noise reduction structure 2 is arranged in the shell 1, and includes a sound receiving unit 31, an ARM processing unit 32 and a sound generating unit 33 which are electrically connected in sequence; the power supply structure 3 is electrically connected to the ARM processing unit 32, and is used to supply power to the noise reduction structure 2.

[0027] When the earplug is in operation, the sound receiving unit 31 collects the sound source, converts the sound source from an acoustic signal into an electrical signal through ARM processing, and then sends it to the sound generating unit 33 after noise reduction processing. The generating unit converts the electrical signal back into an acoustic signal and transmits it to the user.

[0028] Among them, the sound receiving unit 31 collects the sound source and converts the sound source from an acoustic signal into an electrical signal. The ARM then performs AD sampling, adaptive noise reduction and DA output amplification, and then sends it to the sound generating unit 33, which transmits it to the user in the form of an acoustic signal.

[0029] Before performing adaptive noise reduction, the ARM processing unit 32 retains the audio data in the frequency band of 200 Hz to 4000 Hz through low-pass and anti-aliasing filtering, and performs adaptive noise reduction processing for different scenarios through real-time setting of the noise threshold.

[0030] Specifically, when the noise of the sound source is within 85 dB, the ARM processing unit 32 will perform direct processing on the sound source, that is, no noise reduction measures are taken, the original sound source is maintained, and the sound source is directly sent to the sound generating unit 33 after being amplified by the DA output.

[0031] When the noise of the sound source is greater than 85dB but within 130dB, the ARM processing unit 32 will output a sound source signal with a similar amplitude and opposite phase to the sound source to offset the noise, and then after speech enhancement processing, it will be amplified through the DA output and sent to the sound unit 33.

[0032] When the noise of the sound source is greater than 130dB, the communication channel is cut off and the moving iron sound unit 33 no longer receives the signal. The physical noise reduction of the earplug (the total noise reduction depth is 50dB on average in the range of 125Hz to 8000Hz) can meet the safety requirements of human ear protection.

[0033] By performing adaptive noise reduction processing in different sound source scenarios, the user can ensure that when using the earplugs, they can not only stably receive effective signals (such as human voices, footsteps, etc.), but also suppress the noise in the environment (such as the explosion sound of guns and weapons), thereby protecting the user's hearing while enhancing the perception and acquisition of important signals.

[0034] It should be noted that in the specific steps of the isolation processing, the connection between the ARM processing unit 32 and the sound receiving unit 31 can be disconnected, or the connection between the ARM processing unit 32 and the sound emitting unit 33 can be disconnected, or the connection between the ARM unit and the sound receiving unit 31 and the sound emitting unit 33 can be disconnected simultaneously.

[0035] Further, refer to Figure 1 and Figure 2 A plurality of earplug caps 7 are arranged at one end of the shell 1, and the plurality of earplug caps 7 are stacked in sequence, so that the earplug caps 7 can better fill the ear canal and form a tighter seal, thereby enhancing the sound insulation effect and reducing the interference of external noise.

[0036] In addition, a flexible protective layer is wrapped around the housing 1. The material of the flexible protective layer can be specifically set according to the specific situation. In a specific embodiment, the flexible protective layer can be made of silicone material. In another specific embodiment, the flexible protective layer can also be set to other adaptive elastic plastic materials.

[0037] The flexible protective layer has a relatively soft texture, which can increase the comfort when wearing the earplugs, reduce the pressure and discomfort in the ears, and at the same time make the earplugs fit more closely into the ear canal, reduce the occurrence of sound leakage, and enhance the sound quality.

[0038] Further, refer to Figure 2 and Figure 3 The housing 1 is provided with a mounting hole 11, and the invisible sound pickup noise reduction earplug further includes an invisible extraction structure 4, one end of the invisible extraction structure 4 is mounted to the mounting hole 11, and the other end is provided with a protrusion 41, and the protrusion 41 is at least partially placed outside the housing 1. When the earplug needs to be removed, the user can pinch the protrusion 41 to drag the earplug outward, making the use of the earplug more convenient.

[0039] Furthermore, considering the arrangement of the mounting hole 11, the sound source penetrates into the housing 1 through the mounting hole 11, and the housing 1 fails to isolate the noise well. In a specific embodiment, the housing 1 is filled with a resonant sound absorbing material.

[0040] Specifically, the resonant sound-absorbing material has multiple sound-absorbing holes, which can absorb sound waves within a specific frequency range. When the frequency of the incident sound wave is the same as the resonant frequency of the structure, the resonant sound-absorbing material will vibrate, and the sound wave will be converted into internal friction loss through vibration, thereby increasing the absorption of noise.

[0041] The sound source is preliminarily physically reduced in noise by combining the resonant sound-absorbing material with the shell 1, thereby ensuring the noise reduction effect of the earplug.

[0042] Further, refer to Figure 4 The sound receiving unit 31 includes two sets of sound receiving microphones, both of which are electrically connected to the ARM processing unit 32; one set of sound receiving microphones is used to obtain the external sound source of the shell 1, and the other set of sound receiving microphones is used to obtain the internal sound source of the shell 1.

[0043] That is, the sound collecting unit 31 collects sound sources inside and outside the shell 1 at the same time. Through the coordinated work of the two groups of microphones, the earplug can more accurately identify and eliminate noise of various frequencies, thereby providing a more effective active noise reduction effect.

[0044] It should be noted that the sound pickup microphone used to obtain the sound source inside the shell 1 is closer to the center of the shell 1 than the other set of sound pickup microphones, so that both sets of sound pickup microphones can better collect the corresponding sound source. In another specific embodiment, only one set of sound pickup microphones can be set, and the sound pickup microphone collects the sound sources inside and outside the shell 1 at the same time, so that the overall internal structure of the earplug is simpler and easier to layout.

[0045] Further, refer to Figure 2 and Figure 3A charging interface 5 is provided in the shell 1 , and the charging interface 5 is electrically connected to the power supply structure 3 . When the power supply structure 3 is insufficient in electricity, the power supply structure 3 is supplemented with electricity through the charging interface 5 .

[0046] The form of the charging interface 5 can be specifically set according to actual conditions. In a specific embodiment, the charging interface 5 can be set as a plug-in interface, such as any one of a Type-C interface, a Micro interface, or a round hole interface. In another specific embodiment, the charging interface 5 can also be set as a metal contact.

[0047] Furthermore, the position of the charging interface 5 can also be specifically set according to actual conditions. In a specific embodiment, a matching hole 12 is opened on the shell 1, and the charging interface 5 is arranged to extend partially out of the shell 1 through the matching hole 12.

[0048] In this case, the charging interface 5 is preferably a metal contact, so that the aperture of the matching hole 12 is smaller, which ensures the noise reduction function while facilitating charging.

[0049] In another specific embodiment, the matching hole 12 may be omitted, and the charging interface 5 is disposed at the mounting hole 11. Correspondingly, one end of the invisible pull-out structure 4 is slidably / rotatably disposed at the mounting hole 11.

[0050] When the user removes the earplug through the invisible pull-out structure 4 , the invisible pull-out structure 4 slides / rotates relative to the shell 1 . At this time, the charging interface 5 is no longer blocked by the protrusion 41 , and the user can charge the power supply structure 3 through the charging interface 5 .

[0051] When the earplug is in use, the mounting hole 11 is closed by the protrusion 41, which provides better protection for the charging port 5 and prevents dust or dirt from entering the charging port 5 or the housing 1. It also blocks noise and ensures the noise reduction effect of the earplug when the mounting hole 11 is opened.

[0052] Furthermore, the invisible pull-out structure 4 can be reset. When not pulled, the invisible pull-out structure 4 resets and re-blocks the mounting hole 11, which reduces the need for the user to re-install the invisible pull-out structure 4 back into the mounting hole 11, making the earplug more convenient to use.

[0053] Specifically, the invisible extraction structure 4 further includes a connection portion 42 connected to the protruding portion 41 , and the connection portion 42 can be adaptively adjusted according to the specific configuration of the invisible extraction structure 4 .

[0054] When the invisible pull-out structure 4 is rotated and set at the mounting hole 11, the connecting part 42 can be twisted with the shell 1 (through the torsion spring). When the invisible pull-out structure 4 is slidably set at the mounting hole 11, the connecting part 42 can slide in the mounting hole 11. A spring is set in the shell 1. Both the torsion spring and the spring can apply a rebound force to the invisible pull-out structure 4 to achieve a reset effect.

[0055] It should be noted that the present application does not specifically limit the form of realizing the reset function. In addition to the torsion spring and the spring, other suitable forms may also be used.

[0056] Furthermore, a power button 6 is provided on the protruding portion 41 . The power button 6 is arranged on a side away from the housing 1 and is electrically connected to the power supply structure 3 (may be through a wire).

[0057] When the user wears the earplugs, the user presses the power button 6 to enable the power supply structure 3 to supply power to the noise reduction structure 2, and the earplugs are successfully turned on. When the user does not need to wear the earplugs, the user presses the power button 6 again, and after the earplugs are turned off, pinches the invisible pull-out structure 4 to remove the earplugs.

[0058] In addition, it should be noted that, referring to Figure 5 In other specific embodiments, the invisible pull-out structure 4 can also be fixed outside the shell 1. In this case, the connecting portion 42 is set as a pull rope. In this case, the setting of the mounting hole 11 can be further cancelled. By pulling the protrusion 41 on the pull rope, the purpose of facilitating the removal of the earplug can also be achieved.

[0059] At the same time, in order to facilitate the storage of the invisible pull-out structure 4, a hidden groove (not shown in the figure) can also be opened outside the shell 1. When the invisible pull-out structure 4 is not needed, the pull rope can be hidden in the hidden groove.

[0060] In addition, the present application also provides a method for noise reduction by sound pickup, comprising the following steps: S1, obtaining the sound sources inside and outside the housing 1 and converting them into electrical signals, performing low-pass and filtering processing on the obtained sound sources, and retaining the sound source data in the frequency band of 200 Hz to 4000 Hz; S2, set the noise threshold range and process the sound source data directly. ; Adaptive noise reduction processing, ; Partition treatment, ; Where P is the decibel size of the sound source data; S3, performing enhancement processing on the processed sound source data; S4, converting the sound source data from an electrical signal into an electrical signal, and playing the processed sound source data.

[0061] Among them, in S2, the isolation processing is: disconnecting the connection between the ARM unit and the sound receiving unit 31 and the sound emitting unit 33.

[0062] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An invisible sound pickup and noise reduction earplug, characterized in that: include; A housing (1) having an outer shape adapted to fit the ear canal and provided with a mounting hole (11); A noise reduction structure (2) is arranged in the housing (1), comprising a sound receiving unit (31), an ARM processing unit (32) and a sound generating unit (33) which are electrically connected in sequence; A power supply structure (3), electrically connected to the ARM processing unit (32), and used to supply power to the noise reduction structure (2); An invisible pull-out structure (4), wherein the invisible pull-out structure (4) can be restored to be disposed at the mounting hole (11), or The invisible extraction structure (4) is fixedly arranged outside the shell (1), and a hidden groove for accommodating the invisible extraction structure (4) is provided outside the shell (1); the invisible extraction structure (4) comprises a protruding portion (41), and at least a part of the protruding portion (41) is disposed outside the shell (1).

2. The invisible sound pickup and noise reduction earplug according to claim 1, characterized in that: A charging interface (5) is provided in the housing (1), and the charging interface (5) is electrically connected to the power supply structure (3); The charging interface (5) is arranged at the mounting hole (11); or a matching hole (12) is provided on the shell (1), and the charging interface (5) is arranged to partially protrude from the shell (1) through the matching hole (12).

3. The invisible sound pickup and noise reduction earplug according to claim 2, characterized in that: The charging interface (5) is arranged at the mounting hole (11), one end of the invisible pull-out structure (4) can be returned to the mounting hole (11), and the protruding portion (41) closes the charging interface (5) when in close contact with the housing (1).

4. The invisible sound pickup and noise reduction earplug according to claim 2 or 3, characterized in that: The protruding portion (41) is provided with a power button (6), and the power button (6) is electrically connected to the power supply structure (3).

5. The invisible sound pickup and noise reduction earplug according to claim 1, characterized in that: The sound receiving unit (31) comprises two groups of sound receiving microphones, and the two groups of sound receiving microphones are electrically connected to the ARM processing unit (32); Wherein, one group of the sound pickup microphones is used to obtain the external sound source of the shell (1), and one group of the sound pickup microphones is used to obtain the internal sound source of the shell (1).

6. The invisible sound pickup and noise reduction earplug according to claim 1, characterized in that: One end of the housing (1) is provided with a plurality of earplug caps (7), and the plurality of earplug caps (7) are stacked in sequence.

7. The invisible sound pickup and noise reduction earplug according to claim 1 or 6, characterized in that: The shell (1) is wrapped with a flexible protective layer.

8. The invisible sound pickup and noise reduction earplug according to claim 1 or 6, characterized in that: The shell (1) is filled with resonant sound absorbing material.

9. A sound pickup and noise reduction method, based on the invisible sound pickup and noise reduction earplug according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, obtaining sound sources inside and outside the housing (1) and converting them into electrical signals, performing low-pass and filtering processing on the obtained sound sources, and retaining sound source data in the frequency band of 200 Hz to 4000 Hz; S2, set the noise threshold range and process the sound source data directly. ; Adaptive noise reduction processing, ; Partition treatment, ; Where P is the decibel size of the sound source data; S3, performing enhancement processing on the processed sound source data; S4. Convert the sound source data from an acoustic signal into an electrical signal, and play the processed sound source data.

10. The method for noise reduction by sound pickup according to claim 9, characterized in that: In S2, the partition process is as follows: The ARM unit is disconnected from the sound receiving unit (31) and the sound generating unit (33).

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