Noise reduction and sound insulation earplug

Abstract

The utility model relates to the technical field of earplugs, and provides a noise-reduction sound-insulation earplug, which is used for being placed in an ear canal to isolate external sound, and comprises a shell which is internally provided with a ventilation chamber and is provided with an interface communicated with the ventilation chamber; the ear cap is arranged at the position of the connector, a channel is formed in the ear cap, and when the noise reduction and sound insulation earplug is worn, the ventilation cavity is communicated with the ear canal through the connector and the channel in sequence; and the noise reduction reinforcing part is arranged in the ventilation cavity and / or the connector, and a zeolite material is contained in the noise reduction reinforcing part. The sound insulation earplug can solve the problem that the existing sound insulation earplug is difficult to give consideration to both the noise reduction effect and the wearing comfort.

Description

Technical Field

[0001] The utility model relates to the technical field of earplugs, in particular to a noise reduction and sound insulation earplug. Background Art

[0002] In order to reduce the impact of noise on the human body in production, and in order to achieve a quiet living, learning, working and sleeping environment in life, earplugs are used in the human ears to reduce noise and sound insulation.

[0003] Most of the existing soundproofing earplugs directly use materials to block the air to reduce noise and sound insulation. They use flexible materials, which the wearer inserts into the ear canal. After the material rebounds, it fills the ear canal, thereby reducing the impact of external noise.

[0004] Inserting noise-isolating earplugs into the ear canal will cause the air in the ear canal to be squeezed inside the ear canal, causing pressure on the eardrum. Long-term wearing will cause discomfort and tinnitus, and it is not suitable for repeated use.

[0005] Some new noise-reducing and sound-isolating earplugs take wearing comfort into consideration, but they have leakage holes inside that connect to the outside, or they are hollow inside, so the noise-reducing and sound-isolating effects are not ideal, and it is impossible to take into account both noise-reduction effect and wearing comfort. Utility Model Content

[0006] The utility model aims to provide a noise reduction and sound insulation earplug, so as to solve the problem that the existing sound insulation earplugs are difficult to achieve both noise reduction effect and wearing comfort.

[0007] The above technical objectives of the utility model are mainly achieved through the following technical solutions:

[0008] The utility model provides a noise reduction and sound insulation earplug, which is used to be placed in the ear canal to isolate external sounds, and comprises:

[0009] A housing having a ventilation chamber therein, wherein the housing has an interface communicating with the ventilation chamber;

[0010] An ear cap is arranged at the interface, and a channel is arranged on the ear cap, and when the noise reduction and sound insulation earplug is worn, the ventilation chamber is connected to the ear canal through the interface and the channel in sequence;

[0011] A noise reduction reinforcement member is disposed in the ventilation chamber and / or the interface, and the noise reduction reinforcement member contains zeolite material.

[0012] The noise reduction and sound insulation earplugs described in the utility model can avoid generating a large ear pressure in the ear canal of the wearer when being worn. The noise reduction and sound insulation earplugs have a ventilation chamber that can be connected to the ear canal. During the wearing process, the air in the ear canal can enter the ventilation chamber, thereby increasing the air flow space; that is, during the wearing process of the earplugs, the air in the ear canal will not be blocked in the ear canal. Since the ear canal is connected to the ventilation chamber, the air in the ear canal can flow into the ventilation chamber when compressed, so the pressure of the air in the ear canal does not change much, and will not cause obvious compression on the eardrum; at the same time, the noise reduction reinforcement member arranged in the ventilation chamber has the effect of sound absorption and virtual expansion (the effect of zeolite material), which can absorb air to a certain extent to reduce the ear pressure in the ear canal, and avoid generating a large ear pressure in the ear canal after the earplugs are worn.

[0013] The noise reduction and sound insulation earplugs described in the utility model can avoid the problem of not being able to be worn for a long time due to fluctuations in ear pressure in the ear canal during wearing. The noise reduction reinforcement member arranged in the ventilation chamber also has a certain air pressure buffering function. When the position of the earplug changes or the air in the ear canal fluctuates due to the movement of the wearer, the air pressure (ear pressure) in the ear canal will not fluctuate due to the buffering effect of the noise reduction reinforcement member, thereby improving the comfort of the earplug during wearing.

[0014] The noise reduction and sound insulation earplugs described in the utility model can improve the sound insulation effect of the earplugs, and the virtual expansion effect of the noise reduction reinforcement can virtually increase the actual physical cavity of the ventilation chamber (the effect brought by the microporous structure in the noise reduction reinforcement). When in use, the sound that is finally transmitted to the ear canal through the earplug sound insulation will be drained into the shell because the other end connected to the ear canal has a larger cavity, and will be consumed and absorbed by the noise reduction reinforcement (the zeolite material therein), thereby achieving a better noise reduction effect.

[0015] The noise reduction and sound insulation earplug of the utility model has a wide application range. The ear cap and the shell are detachably connected, and ear caps of different sizes can be replaced according to different wearers, thereby improving the application range of the earplug; and after the earplug is used for a long time, the ear cap with poor sound insulation effect can be replaced, thereby extending the service life of the earplug.

[0016] In a preferred embodiment of the present invention, the housing includes two half shells connected to each other, and the ventilation chamber is formed between the two half shells.

[0017] In this embodiment, the outer shell is formed by connecting two half shells, which can facilitate the installation of the ventilation chamber and / or the noise reduction reinforcement in the interface.

[0018] In a preferred embodiment of the present invention, the noise reduction reinforcement member is a sound absorbing block made of zeolite, the sound absorbing block is located in the ventilation chamber and / or the interface, and the outer contour of the sound absorbing block is parallel to the side wall contour of the ventilation chamber and / or the interface.

[0019] In a preferred embodiment of the present invention, the noise reduction reinforcement component is a sound absorbing sheet or a sound absorbing block containing zeolite, and the sound absorbing sheet is arranged at the interface.

[0020] In a preferred embodiment of the present invention, the sound absorbing sheet includes a three-dimensional framework structure and the zeolite loaded on the three-dimensional framework structure.

[0021] In this embodiment, the sound absorbing sheet is formed by zeolite being adsorbed on a three-dimensional framework structure, which can improve the sound absorption and buffering effects of the sound absorbing sheet.

[0022] In a preferred embodiment of the present invention, the noise reduction reinforcement member is sound-absorbing particles containing zeolite, and a plurality of the sound-absorbing particles are filled in the ventilation chamber and / or the interface.

[0023] In a preferred embodiment of the present invention, the noise reduction and sound isolating earplug further comprises: a dustproof part, which is arranged at the interface to prevent impurities from entering the ventilation chamber.

[0024] In this embodiment, the dustproof member can not only prevent external impurities from entering the ventilation chamber, but also prevent debris generated by the noise reduction enhancement member in the ventilation chamber from entering the ear canal.

[0025] In a preferred embodiment of the present invention, the dustproof component is a dustproof net, and the mesh size of the dustproof net is less than 0.2 mm.

[0026] In a preferred embodiment of the present invention, the ear cap is an elastic ring column made of flexible material, and the channel is a hollow position of the elastic ring column.

[0027] In this embodiment, the ear cap fits the side wall of the wearer's ear canal, and has a certain elasticity so as to better fit the wearer's ear canal, thereby enhancing the sound insulation effect of the earplug.

[0028] In a preferred embodiment of the present invention, a ring groove is provided on the side wall of the channel, and the interface has a convex ring, which can be snapped into the ring groove so that the ear cap can be sleeved on the interface; or, a convex ring is provided on the side wall of the channel, and the interface has a ring groove, and the convex ring can be snapped into the ring groove so that the ear cap can be sleeved on the interface.

[0029] In this embodiment, the ear cap and the interface are directly snap-fitted together, which facilitates installation and removal of the ear cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0031] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0032] Figure 1 This is a structural schematic diagram of the first embodiment of the noise reduction and sound insulation earplug of the utility model;

[0033] Figure 2 This is a structural schematic diagram of the second embodiment of the noise reduction and sound insulation earplug of the utility model;

[0034] Figure 3 This is a structural schematic diagram of the third embodiment of the noise reduction and sound insulation earplug of the utility model;

[0035] Figure 4 This is a structural schematic diagram of the fourth embodiment of the noise reduction and sound insulation earplug of the utility model;

[0036] Figure 5 This is a schematic structural diagram of the fifth embodiment of the noise reduction and sound insulation earplugs described in the present invention.

[0037] Description of reference numerals:

[0038] 10. Shell; 11. Ventilation chamber; 20. Interface; 30. Ear cap; 31. Channel; 40. Sound-absorbing block; 41. Sound-absorbing sheet; 42. Sound-absorbing particles; 50. Dust-proof part. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solutions in the present invention, 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 should fall within the scope of protection of the present invention.

[0040] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0042] like Figures 1 to 5 As shown, the utility model provides a noise reduction and sound insulating earplug, which is used to be placed in the ear canal to isolate the external sound, and includes: a shell 10, which has a ventilation chamber 11, and the shell 10 has an interface 20 connected to the ventilation chamber 11; an ear cap 30, which is detachably arranged at the interface 20, and the ear cap 30 is provided with a channel 31, when the noise reduction and sound insulating earplug is worn, the ventilation chamber 11 is connected to the ear canal through the interface 20 and the channel 31 in sequence; a noise reduction reinforcement member, the noise reduction reinforcement member is arranged in the ventilation chamber 11 and / or the interface 20, and the noise reduction reinforcement member contains zeolite material, which is used to absorb at least part of the air in the ear canal to reduce the ear pressure in the ear canal.

[0043] The noise reduction and sound insulation earplugs described in the utility model can avoid generating a large ear pressure in the ear canal of the wearer when wearing. When the earplug is worn, the earplug and the ear canal will eventually form a relatively closed space. The earplug has a ventilation chamber 11 that can be connected to the ear canal. During the wearing process, the air in the ear canal can enter the ventilation chamber 11, thereby increasing the air flow space; that is, during the wearing process of the earplug, the air in the ear canal will not be blocked in the ear canal. Since the ear canal is connected to the ventilation chamber 11, the air in the ear canal can flow into the ventilation chamber 11 when compressed, so the pressure of the air in the ear canal does not change much, and will not cause obvious compression on the eardrum; at the same time, the noise reduction reinforcement member arranged in the ventilation chamber 11 has the effect of sound absorption and virtual expansion (the effect of zeolite material). As the pressure in the ear canal increases after the earplug is worn, the air adsorption effect of the noise reduction reinforcement member is enhanced, and the air can be adsorbed to a certain extent to reduce the ear pressure in the ear canal, thereby avoiding generating a large ear pressure in the ear canal after the earplug is worn.

[0044] The noise reduction and sound insulation earplugs described in the utility model can avoid the problem of not being able to be worn for a long time due to fluctuations in ear pressure in the ear canal during wearing. The noise reduction reinforcement member arranged in the ventilation chamber 11 also has a certain air pressure buffering function. When the position of the earplug changes or the air in the ear canal fluctuates due to the movement of the wearer, the air pressure (ear pressure) in the ear canal will not fluctuate under the buffering effect of the noise reduction reinforcement member, thereby improving the comfort of the earplug during wearing.

[0045] The noise reduction and sound insulation earplugs of the utility model can improve the sound insulation effect of the earplugs. When in use, the sound that is finally transmitted to the ear canal through the earplug sound insulation will be guided into the ventilation chamber 11 because the other end connected to the ear canal has a larger cavity, and will be consumed and absorbed by the noise reduction reinforcement part, thereby achieving a better noise reduction effect.

[0046] The noise reduction and sound insulation earplug of the utility model has a wide application range. The ear cap 30 and the shell 10 are detachably connected, and ear caps 30 of different sizes can be replaced according to different wearers, thereby improving the application range of the earplug; and after the earplug is used for a long time, the ear cap 30 with poor sound insulation effect can be replaced, thereby extending the service life of the earplug.

[0047] The following will describe in detail the specific structure of each part of the noise reduction and sound insulation earplug described in the present invention, as well as the position and connection relationship between the various parts of the structure.

[0048] like Figure 1 and Figure 2As shown, the noise reduction and sound insulating earplug described in the present invention has a shell 10, which is a thin-walled shell, and the shell 10 is the main structure of the entire earplug; a ventilation chamber 11 is formed in the shell 10, and after the wearer wears the above-mentioned earplug, the ventilation chamber 11 can be connected with the wearer's ear canal.

[0049] The shape of the housing 10 can be designed according to actual needs and is not specifically limited here; Figure 1 As shown, in this embodiment, the housing 10 is designed to be in a shape similar to a boomerang, with a bent portion formed in the middle, an interface 20 provided at one end for connection with the ear cap 30, and the other end is closed to facilitate the wearer to take the earplug.

[0050] The interface 20 is a connecting circular hole that penetrates the shell 10. The ventilation chamber 11 in the shell 10 can be connected to the outside through the interface 20. The interface 20 is detachably connected to the ear cap 30. When the earplug is worn, the ear cap 30 enters the ear canal of the wearer and is attached to the side wall of the ear canal. The ear cap 30 can connect the ear canal with the ventilation chamber 11, and the air in the ear canal can flow into the ventilation chamber 11.

[0051] like Figures 1 to 3 As shown, the noise reduction and sound insulation earplugs described in the utility model also have a noise reduction reinforcement member arranged in the above-mentioned ventilation chamber 11 and / or the interface 20. The noise reduction reinforcement contains zeolite, a sound-absorbing material, and the interior of the zeolite has a microporous structure. Therefore, the unique multi-channel structure of the noise reduction reinforcement member can play a buffering role. The larger cavity formed by its virtual expansion effect can reduce the air pressure (ear pressure) and pressure in the wearer's ear canal. At the same time, the noise reduction reinforcement member also has a sound-absorbing effect. Part of the sound that is finally transmitted into the ear canal through the earplug sound insulation will be guided into the ventilation chamber 11, and then consumed and absorbed by the noise reduction reinforcement member in the ventilation chamber 11, thereby improving the noise reduction effect of the above-mentioned earplug.

[0052] Further, such as Figure 1 As shown, the noise reduction reinforcement member can be arranged in the ventilation chamber 11; Figure 2 As shown, the noise reduction enhancement member can also be set in the interface 20; Figure 3 As shown, the noise reduction reinforcement member can also be disposed in both the ventilation chamber 11 and the interface 20 .

[0053] The structure and technical effects of the preferred embodiment of the noise reduction and sound insulation earplug described in the present invention will be further described below.

[0054] According to one embodiment of the present invention, the housing 10 includes two half shells connected to each other, and the ventilation chamber 11 is formed between the two half shells. The housing 10 is formed by connecting the two half shells, which can facilitate the installation of the ventilation chamber 11 and / or the noise reduction reinforcement in the interface 20.

[0055] Of course, in other embodiments of the present invention, the shell 10 may also be an integrated structure, but it is necessary to consider whether the noise reduction reinforcement can be installed into the ventilation chamber 11 or the interface 20 from the interface 20. If the shape of the noise reduction reinforcement makes it impossible to install it from the interface 20, the shell 10 cannot adopt an integrated structure.

[0056] According to one embodiment of the present utility model, Figures 1 to 3 As shown, the noise reduction reinforcement member is a sound absorbing block 40 made of zeolite, which is located in the ventilation chamber 11 and / or the interface 20 , and the outer contour of the sound absorbing block 40 matches the side wall contour of the ventilation chamber 11 and / or the interface 20 .

[0057] Specifically, Figure 1 As shown, a zeolite block (sound absorbing block 40) made of zeolite is arranged in the ventilation chamber 11 and partially fills the space in the ventilation chamber 11; the filling range of the zeolite block in the ventilation chamber 11 can be determined according to actual needs, that is, the zeolite block can also fill the entire ventilation chamber 11. The outer contour of the zeolite block is parallel to the contour of the inner side wall of the ventilation chamber 11, that is, the zeolite block can be directly positioned and fixed by the inner side wall of the ventilation chamber 11.

[0058] like Figure 2 As shown, it is Figure 1 The difference between the embodiment shown in FIG. 2 and FIG. 3 is that the zeolite block (sound absorbing block 40) is arranged in the interface 20, and the outer contour of the zeolite block is parallel to the contour of the inner side wall of the interface 20; Figure 3 As shown, it is Figure 1 The difference of the embodiment shown in FIG. 4 is that the zeolite block (sound absorbing block 40 ) is arranged in both the ventilation chamber 11 and the interface 20 .

[0059] According to one embodiment of the present utility model, Figure 4 As shown, the noise reduction reinforcement component is a sound absorbing sheet 41 containing zeolite, and the sound absorbing sheet 41 is arranged at the interface 20.

[0060] Specifically, Figure 4 As shown, a sound-absorbing sheet 41 made directly of zeolite is arranged at the connecting position between the interface 20 and the ventilation chamber 11, thereby forming a sound-absorbing layer between the interface 20 and the ventilation chamber 11; the sound-absorbing sheet 41 is a circular sheet structure and can be fixed to one end of the interface 20 by bonding or clamping.

[0061] Preferably, the sound absorbing sheet 41 includes a three-dimensional framework structure and zeolite loaded on the three-dimensional framework structure. The sound absorbing sheet 41 made of zeolite and a three-dimensional framework structure (carbon skeleton, organic skeleton, etc.) can improve the sound absorption and buffering effect of the sound absorbing sheet 41, thereby improving the use experience of the noise reduction and sound insulation earplugs.

[0062] According to one embodiment of the present utility model, Figure 5 As shown, the noise reduction enhancement member is sound absorbing particles 42 containing zeolite, and a plurality of sound absorbing particles 42 are filled in the ventilation chamber 11 and / or the interface 20 .

[0063] Specifically, Figure 5 As shown, the noise reduction reinforcement member can also use sound-absorbing particles 42 made of zeolite. A plurality of sound-absorbing particles 42 are filled into the ventilation chamber 11 and fixed by a fixing net or glue to prevent the sound-absorbing particles 42 from shaking. According to actual needs, the ventilation chamber 11 can be partially filled with sound-absorbing particles 42, or the ventilation chamber 11 and the interface 20 can be filled with sound-absorbing particles 42. No specific limitation is made here.

[0064] The above-mentioned sound-absorbing blocks 40, sound-absorbing sheets 41 or sound-absorbing particles 42 are all structural forms of noise reduction reinforcement parts, and can all play the technical effects of the noise reduction reinforcement parts mentioned above. The working principles and technical effects of the above-mentioned three structural forms of noise reduction reinforcement parts will not be repeated here.

[0065] According to one embodiment of the present utility model, Figure 1 and Figure 5 As shown, the noise reduction and sound insulation earplug also includes: a dustproof member 50, which is arranged at the interface 20 to prevent impurities from entering the ventilation chamber 11; the dustproof member 50 is covered at one end of the interface 20 facing the ear cap 30, and can be fixed by bonding or clamping. The dustproof member 50 can not only prevent foreign impurities from entering the ventilation chamber 11, but also prevent debris generated by the noise reduction reinforcement member in the ventilation chamber 11 from entering the ear canal.

[0066] Preferably, the dustproof member 50 is a dustproof net, and the mesh size of the dustproof net is less than 0.2 mm; that is, if the mesh is a round hole, the diameter of the round hole is less than 0.2 mm, and if the mesh is a square hole, the side length of the square hole is less than 0.2 mm.

[0067] According to one embodiment of the present invention, the ear cap 30 is an elastic ring column made of a flexible material, and the hollow portion in the elastic ring column forms the above-mentioned channel 31, and the ventilation chamber 11 is connected to the ear canal through the channel 31. The ear cap 30 fits the side wall of the wearer's ear canal, and has a certain elasticity that can better fit the ear canal, thereby enhancing the sound insulation effect of the earplug.

[0068] Preferably, the ear cap 30 can be made of rubber with good flexibility.

[0069] According to one embodiment of the present utility model, Figure 1As shown, a ring groove is provided on the side wall of the channel 31, and the interface 20 has a convex ring, which can be snapped into the ring groove so that the ear cap 30 can be sleeved on the interface 20; the ring groove is set at one end of the channel 31 close to the shell 10, and the convex ring is formed on the outer wall of the interface 20, and the ear cap 30 and the interface 20 are directly snapped together, which is convenient for the installation and removal of the ear cap 30.

[0070] In other embodiments of the present invention, the positions of the annular groove and the convex ring can be interchanged; that is, a convex ring is provided on the side wall of the channel 31, and an annular groove is provided on the outer side wall of the interface 20, and the convex ring on the ear cap 30 can be inserted into the annular groove on the interface 20 to achieve the installation of the ear cap 30.

[0071] As shown in Table 1 below, which shows the noise reduction effects and ear pressure conditions of different types of earplugs, it can be seen that the technical solution (noise reduction and sound insulating earplugs) provided in this application can not only greatly reduce ear pressure but also bring excellent noise reduction effect.

[0072] Table 1 Comparison of noise reduction effects and ear pressure of different types of earplugs

[0073] Earplug type Noise reduction effect Ear pressure No cavity earplugs good High ear pressure Cavity earplugs better High ear pressure This application earplugs very good Less ear pressure

[0074] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A noise reduction and sound insulation earplug, used to be placed in the ear canal to isolate external sounds, characterized in that: include: A housing having a ventilation chamber therein, wherein the housing has an interface communicating with the ventilation chamber; An ear cap is arranged at the interface, and a channel is arranged on the ear cap, and when the noise reduction and sound insulation earplug is worn, the ventilation chamber is connected to the ear canal through the interface and the channel in sequence; A noise reduction reinforcement member is disposed in the ventilation chamber and / or the interface, and the noise reduction reinforcement member contains zeolite material.

2. The noise reduction and sound insulation earplug according to claim 1, characterized in that: The housing comprises two half shells connected to each other, and the ventilation chamber is formed between the two half shells.

3. The noise reduction and sound insulation earplug according to claim 1, characterized in that: The noise reduction reinforcement member is a sound absorbing block made of zeolite, the sound absorbing block is located in the ventilation chamber and / or the interface, and the outer contour of the sound absorbing block is parallel to the side wall contour of the ventilation chamber and / or the interface.

4. The noise reduction and sound insulation earplug according to claim 1, characterized in that: The noise reduction reinforcement member is a sound absorbing sheet or a sound absorbing block containing zeolite, and the sound absorbing sheet is arranged at the interface.

5. The noise reduction and sound insulation earplug according to claim 4, characterized in that: The sound absorbing sheet includes a three-dimensional framework structure and the zeolite supported on the three-dimensional framework structure.

6. The noise reduction and sound insulation earplug according to claim 1, characterized in that: The noise reduction reinforcement member is sound-absorbing particles containing zeolite, and a plurality of the sound-absorbing particles are filled in the ventilation chamber and / or the interface.

7. The noise reduction and sound insulation earplug according to claim 1, characterized in that: The noise reduction and sound isolating earplugs also include: A dustproof part is arranged at the interface to prevent impurities from entering the ventilation chamber.

8. The noise reduction and sound insulation earplug according to claim 7, characterized in that: The dustproof part is a dustproof net, and the mesh size of the dustproof net is less than 0.2 mm.

9. The noise reduction and sound insulation earplug according to claim 1, characterized in that: The ear cap is an elastic ring column made of flexible material, and the channel is the hollow position of the elastic ring column.

10. The noise reduction and sound insulation earplug according to claim 9, characterized in that: The side wall of the channel is provided with an annular groove, and the interface has a convex ring, which can be snapped into the annular groove so that the ear cap can be sleeved on the interface; or, the side wall of the channel is provided with a convex ring, and the interface has an annular groove, and the convex ring can be snapped into the annular groove so that the ear cap can be sleeved on the interface.

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