KR101801016B1 - Noise Reduction adjustment Hearing Protector - Google Patents

Noise Reduction adjustment Hearing Protector Download PDF

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Publication number
KR101801016B1
KR101801016B1 KR1020150097998A KR20150097998A KR101801016B1 KR 101801016 B1 KR101801016 B1 KR 101801016B1 KR 1020150097998 A KR1020150097998 A KR 1020150097998A KR 20150097998 A KR20150097998 A KR 20150097998A KR 101801016 B1 KR101801016 B1 KR 101801016B1
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South Korea
Prior art keywords
noise
hearing protector
reel holder
guide hole
hearing
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KR1020150097998A
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Korean (ko)
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KR20170006804A (en
Inventor
남영환
구호림
김영민
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구호림
김영민
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/06—Protective devices for the ears
    • A61F11/08—Protective devices for the ears internal, e.g. earplugs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/06—Protective devices for the ears
    • A61F11/14—Protective devices for the ears external, e.g. earcaps or earmuffs

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Acoustics & Sound (AREA)
  • Biophysics (AREA)
  • Otolaryngology (AREA)
  • Psychology (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

The present invention relates to a hearing protector for noise reduction control, which comprises a noise guide hole formed in a longitudinal direction of a hearing protector and inserted and fixed at one end of the noise guide hole to close the noise guide hole, Further comprising: a noise control unit configured to reduce noise of the sound signal,
A sound guide hole is formed in the hearing protector and the sound filter is selectively inserted into the noise guide hole, so that the degree of reduction of the noise introduced into the user's ear can be appropriately controlled in consideration of the use situation of the user, (Reduction), but the external sound sources required in the field are guided to be audible so that it can be effectively used at construction sites or military units where noise is frequently generated.
In addition, the pair of hearing protec- tions are connected to each other through the connection means and the connection line, thereby providing convenience to the user for storing and managing the hearing protector, thereby minimizing the loss of the hearing protector.
In addition, the hearing protector can be connected to the control line and the length of the control line can be easily controlled by the reel holder, so that the user can easily retrieve and store the hearing protector by the operation of the reel holder, Not only can the contamination of the reel holder be effectively prevented, but also the reel holder can be easily attached to the user's helmets and the upper garment through the attachment means, thereby ensuring ease of use of the product.

Description

{Noise Reduction Adjustment Hearing Protector}

The present invention relates to a hearing protector for controlling noise reduction, and more particularly, to a hearing protector having a noise guide hole formed in a hearing protector, a sound filter selectively inserted into the noise guide hole, (Noise reduction), but it can induce the external sound sources required in the field to be audible. Therefore, it can be effectively used in construction sites or military units where noise is frequently generated. Hearing protection.

In general, earplugs are intended to protect the wearer's ear against external noise, and can be distinguished by earplugs for noise isolation, earplugs for winter, and earplugs for waterproofing in water.

Here, the ear plug for noise isolation (hereinafter referred to as "hearing protector") is used to prevent noise generated at a construction site such as a factory or a tunnel from entering the ear of a worker. A stopper, etc. are applied.

However, since the above-mentioned noise-isolating hearing protector blocks the ear of the wearer in order to block the noise, the wearer has to remove the hearing protector to listen to the external sound source in order to smoothly perform the operation besides the noise.

So that there is a problem in that the hearing protector for noise shielding can hardly be used at work sites due to inconvenience of the operation.

In addition, since the conventional noise-isolating hearing protectors are separately stored and managed in pairs, there is a problem that frequent loss occurs in the process of storing and managing, which is somewhat inconvenient for storage and management.

In addition, when the conventional noise-isolating hearing protector is used in construction sites and military units where many dusts are generated, the hearing protector is easily contaminated in the process of detaching, storing, and managing the hearing protector with the hand exposed to the dust , And the use of such unsanitary hearing protectors has caused problems in the use of various diseases.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve all of the above problems, and it is an object of the present invention to provide a sound guiding hole in a hearing protector and selectively reduce noise introduced into a user's ear by inserting an acoustic filter into the sound guiding hole. Can be appropriately controlled considering the situation of the use site, so that external noise can be cut off (reduced), but the external sound source necessary for the site can be audibly audited, so that it can be effectively used in construction sites or military units where noise is frequently generated And a hearing protector for noise reduction control.

The present invention also provides a hearing protector for noise reduction control, which can minimize the loss of the hearing protector by connecting the pair of hearing protector to each other through the connection means and the connection line, thereby providing the user with convenience of storing and managing the hearing protector.

In addition, the hearing protector can be connected to the control line and the length of the control line can be easily controlled by the reel holder, so that the user can easily retrieve and store the hearing protector by the operation of the reel holder, The present invention provides a hearing protection device for noise reduction control which can easily use the reel holder by attaching the reel holder to a user's safety cap .

According to another aspect of the present invention, there is provided a hearing protector for controlling noise reduction, the hearing protector being inserted into an external ear canal,

A sound guide hole formed in the longitudinal direction of the hearing protector and a noise control means formed of a plurality of sound filters inserted and fixed to one end of the noise guide hole to close the noise guide hole to reduce noise; Further comprising:

Each of the acoustic filters has a different degree of noise shielding for reducing noise so that any one of the acoustic filters selected by the user is inserted into the noise guide hole to reduce noise as desired by the user .

In addition, a cut-off groove having a predetermined diameter (D) and a height (H) is formed in the acoustic filter,

The cut-off groove formed in each of the acoustic filters is formed so that the diameter D or the height H or the diameter D and the height H are different from each other, .

The hearing protector is connected to a hearing protector of the hearing protector for sound reduction at one end and connected to a hearing protector of the hearing protector for adjusting noise attenuation to be worn at the right ear at the other end, And a connecting means for connecting the connecting means.

The connection means may include a spherical connection protrusion formed at an end of the connection line and a connection hole formed in the hearing protector through a groove or a through hole so that the connection protrusion can be forcedly inserted, And the hearing protector for noise reduction control on both sides is stably connected to each other by the connecting line.

The connecting means includes a connecting groove formed in the hearing protector and a connecting rod having both ends fixedly coupled to an inner surface of the connecting groove,

And an end of the connection string is coupled to the connection rod so that the noise reduction mitigation hearing protection ports of both sides are stably connected to each other by the connection string.

The reel holder may further include an adjusting rope connected to the hearing protector, a reel holder for winding or loosening the other end of the adjusting rope to adjust the length of the adjusting rope, and attachment means for attaching the reel holder ,

When the user pulls the hearing protector connected to the control line, the length of the control line is increased by loosening the control line wound on the reel holder, and when the control line is wound through the operation of the reel holder, The hearing protector connected to the control line is returned to the home position.

Further, the attaching means may include a male velcro fastened to the reel holder and a female velcro fastened to the object to be attached, and the male velcro formed on the reel holder is attached to the female hook- So that the reel holder is firmly fixed to the object.

The reel holder may be fixedly attached to a metal object through a magnetic force of the magnet, or the clip may be inserted into a wearer's clothing to easily attach the reel holder to the reel holder, And the holder is fixed.

As described above, according to the noise reduction control hearing protector of the present invention, the noise guide hole is formed in the hearing protector and the noise filter introduced into the noise guide hole is selectively inserted, It is possible to effectively control the external sound source in a construction site or a military unit where noises are frequently generated by inducing the external sound source to be heard in the field while blocking external noise .

In addition, the pair of hearing protec- tions are connected to each other through the connection means and the connection line, thereby providing convenience to the user for storing and managing the hearing protector, thereby minimizing the loss of the hearing protector.

In addition, the hearing protector can be connected to the control line and the length of the control line can be easily controlled by the reel holder, so that the user can easily retrieve and store the hearing protector by the operation of the reel holder, It is possible to effectively prevent the contamination of the reel holder, and the reel holder can be easily attached to the user's safety cap and upper clothes through the attaching means, thereby ensuring ease of use of the product.

1 is a perspective view of a noise-reducing hearing protector according to a first embodiment of the present invention;
Fig. 2 is a cross-sectional view of the noise-reducing hearing protection shown in Fig. 1
3 is an exploded perspective view of the noise-
4 is a perspective view of a noise-reducing hearing protection device according to a second embodiment of the present invention;
5 is a perspective view of a noise-reducing hearing protector according to a third embodiment of the present invention;
6 is a perspective view of a noise-reducing hearing protector according to a fourth embodiment of the present invention
FIG. 7 is a perspective view of a noise-reducing hearing protector according to a fifth embodiment of the present invention
8 is a perspective view of a noise-reducing hearing protector according to a sixth embodiment of the present invention
FIG. 9 is a view showing the state of use of the noise reduction control sound hole shown in FIG. 1
Fig. 10 is a view showing the state of use of the hearing protection for noise reduction shown in Fig.
Fig. 11 is a diagram showing the state of use of the hearing protection for noise reduction control shown in Fig. 6

A hearing protector for noise reduction control according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Detailed descriptions of well-known functions and constructions that may be unnecessarily obscured by the gist of the present invention will be omitted.

FIG. 1 is a perspective view of a noise-reducing hearing protection device according to a first embodiment of the present invention, and FIG. 2 is a perspective view of a noise- FIG. 3 is a perspective view of a hearing protector for noise reduction control shown in FIG. 1, FIG. 4 is a perspective view of a hearing protector for noise reduction control according to a second embodiment of the present invention, FIG. 5 is a perspective view of a hearing protector for noise reduction control according to a third embodiment of the present invention, FIG. 6 is a perspective view of a hearing protector for noise reduction control according to a fourth embodiment of the present invention, FIG. 8 is a perspective view of a noise-reducing hearing protector according to a sixth embodiment of the present invention, FIG. 9 is a perspective view of a noise-reducing hearing protector according to an embodiment of the present invention, The attitude, Figure 10 is a state diagram showing the use of the noise reduction for adjusting hearing protectors illustrated in the state diagram of the operating noise reduction adjustment hearing protection, Figure 11 is shown in Figure 4. Figure 6 respectively.

As shown in the drawings, a hearing protector 100 for noise reduction control according to an embodiment of the present invention is a hearing protector 1 inserted in an external ear canal,

A noise guide hole 10, and a noise control means 20. [

The hearing protector 1 used in the present invention is a customized type that is made by hand or 3D scanning and is manufactured in accordance with the user's ear and is hard or soft (1) can be selectively made of soft material, silicone can be used, and hard material can be used for clearing. However, the hearing protector (1) is limited Of course not.

2 and 3, the noise guide hole 10 is formed to pass through the hearing protector 1 in a longitudinal direction.

At this time, the noise guide hole 10 is sharply formed in one direction, so that the Yin-Yang filter 21 of the noise control means 20 to be hooked is inserted and fixed easily, and the noise guide hole 10, It is also possible to form a step in which the acoustic filter 21 is hooked.

1 to 3, the noise control means 20 includes a plurality of sound filters (not shown) inserted and fixed to one end of the noise guide hole 10 to close the noise guide hole 10 to reduce noise, (21).

Here, each of the acoustic filters 21 is provided with different degrees of noise shielding for reducing noise.

That is, as shown in FIG. 9A, in order to reduce the noise at the site where the noise is generated and to hear the external sound source for smooth operation, The acoustic filter 21 is inserted and fixed to appropriately reduce the external noise so that the external sound source is smoothly heard.

At this time, the user uses the acoustic filter 21 having a high degree of noise blocking when the external noise level is high considering the noise level generated in the field, and when the level of noise generated in the field is small, The acoustic filter 21 can be freely selected and used in accordance with the degree of noise of the site.

Accordingly, the user can selectively use the acoustic filter 21 having various degrees of noise blocking in the noise guide hole 10 to reduce the noise as desired by the user in consideration of the noise level in the field.

1, a cut-off groove 21a having a predetermined diameter D and a predetermined height H is formed in the acoustic filter 21, and a cut-out groove 21a formed in each of the acoustic filters 21 The cutout groove 21a is formed so that the diameter D or the height H or the diameter D and the height H are different from each other so that the acoustic filters 21 are formed to have different degrees of noise shielding. .

That is, as the diameter D of the cut-off groove 21a is small and the height H is low, the ability to block external noise is excellent, and the diameter D of the cut-off groove 21a is large, The user can selectively use the diameter D and the height H of the cut-off groove 21a formed in the acoustic filter 21 because the degree of blocking the external noise is lower as the height H of the acoustic filter 21 is higher .

Here, the scientific design process of the acoustic filter 21 will be described.

Since hearing loss due to noise is mainly attributed to high-frequency signals, a frequency filter that attenuates high-frequency signals is required. That is, it is necessary to protect the auditory sense by attenuating the signal sharply from several hundred Hz as shown in [Figure 1] below.

[Figure 1] Characteristics of frequency filter for hearing protection

Figure 112015066743387-pat00001

Such a high-frequency attenuating filter, that is, a low-pass filter, can be realized by connecting a plurality of pipes having different diameters as shown in [Fig. 2].

That is, when a sound wave propagates to a hollow drum, a discontinuity occurs at a portion where the diameter changes, so that a part of the sound wave is reflected and passes through the remaining one. At this time, the reflection ratio depends on the diameter, the material of the wall, and the frequency of the signal. When multiple bars are connected, there will be multiple such reflection surfaces, resulting in a double reflection phenomenon where the reflected sound from one side is reflected from the other side, which allows the reflection and transmission coefficients to change rapidly as a function of frequency .

[Figure 2] Implementation of a low-pass filter with a different diameter for different lengths. Example of a low-pass filter composed of three strands with diameters a 1 , a 2 and a 3 and lengths L 1 , L 2 and L 3

Figure 112015066743387-pat00002

In order to analyze the reflection and transmission of sound in these sound waveguides, the impedance model as shown in [Figure 3] is used.

That is, the sound transmission characteristic in each single region is represented by a characteristic impedance Z n ( n = 0, 1, 2, 3, 4). The inherent impedance Z n

Figure 112015066743387-pat00003

. Where ρ is the density of the medium, and v s is the speed of sound.

In addition, Z 0 is the intrinsic impedance of the outer atmosphere, and Z 4 is the intrinsic impedance of the middle ear.

[Figure 3] Transmission-line model of low-pass filter

Figure 112015066743387-pat00004

Where Z 1 , Z 2 and Z 3 are the characteristic impedances of the waveguides whose diameters are a 1 , a 2 and a 3 respectively, Z 0 is the intrinsic impedance of the outer atmosphere, and Z 4 is the middle ear ). ≪ / RTI >

The sound reflection coefficient at the interface between the external air and the frequency filter is

Figure 112015066743387-pat00005

, Where Z in is the impedance that encompasses both the frequency filter and the rest of it

Figure 112015066743387-pat00006

Figure 112015066743387-pat00007

Figure 112015066743387-pat00008

Can be written as. Where k = 2 / = 2f / v s and f is the frequency. Since the sound is not lost inside the drum, the permeability coefficient is

Figure 112015066743387-pat00009

. In other words, the transmittance of the sound transmitted through the various barriers with different radii and materials is a function of the diameter, length and frequency of the barrel. By appropriately adjusting the diameter and length, it is possible to design a high-frequency attenuation filter, that is, a low-pass filter as shown in [Fig. 1].

Therefore, the design of the frequency filter is to determine the diameter and the length of each sound waveguide so that the frequency at which the attenuation starts to appear and the slope thereafter become a desired value. The above formula is very complicated and difficult to design. In practice, however, since the frequency filter must be small enough to be able to enter the earpiece , tan kL can be approximated to kL , and the design of the acoustic filter 21 is performed effectively.

As shown in FIG. 4, one end is connected to the hearing protector 1 of the hearing protector 100 for noise reduction control of the present invention, which is worn on the left ear, and the other end is a hearing protector The hearing protection device according to the present invention further comprises a connection line 31 connected to the hearing protector 1 of the human body 100 and a connection means 32 connecting the end of the connection line 31 to the hearing protector 1,

10, a pair of hearing protector 100 for noise reduction control according to the present invention can be easily connected to each other through the connection line 31 and the connection means 32, so that the noise- 100), it is possible to minimize the loss of the hearing protector.

4, the connecting means 32 includes a spherical coupling protrusion 32a formed at the end of the connecting line 31 and a coupling protrusion 32a formed in the hearing protector 1 through a groove or a through hole, The coupling protrusion 32a is easily inserted into the coupling hole 32b so that the coupling protrusion 32a can be easily inserted into the coupling hole 31 by the connecting rod 31 to control the noise reduction of the present invention. The hearing protector 100 can be stably connected to each other,

A connecting groove 32c formed in the hearing protector 1 and a connecting rod 32d having both ends fixed to the inner surface of the connecting groove 32c, 31 may be bound to the connecting rod 32d so that both of the hearing protectors 100 for noise reduction control according to the present invention can be stably connected to each other by the connecting line 31. However, Of course not.

6, the other end of the adjustable string 41 is connected to the hearing protector 1, and the other end of the adjustable string 41 is wound or loosened to adjust the length of the adjustable string 41 A reel holder 42 for attaching the reel holder 42 to the reel holder 42, and attachment means 43 for attaching the reel holder 42 to the reel holder 42.

11A, the user may attach the article 2 to the article 2, for example, a helmet used at a construction site, at a location where the noise reduction control 100 for the noise reduction can be easily used, The reel holder 42 is easily attached to the reel holder 42 to fix the position of the noise reduction controlling hearing protector 100 according to the present invention through the adjustment rope 41 bound to the reel holder 42,

11b, the hearing protector 1 bound to the adjustment strap 41 is pulled out of the reel holder 42 to adjust the hearing protector 100. [ The hearing protector 1 attached to the adjustment strap 41 is inserted into the ear canal of the user's ear and is easily worn.

11C, the hearing protector 1 can be easily recovered from the user's ear, and then the reel holder 42 can be easily removed from the hearing protector 1, And the hearing protection protector 1 is automatically returned together with the adjustment strap 42 so that it is easily recovered and stored.

Here, the reel holder 42 typically uses a reel holder used for unwinding the string, so that a detailed description thereof will be omitted.

That is, it is possible to minimize the contact of the hearing protector 1 with the hand of the user who is easily contaminated during the collection and storage of the hearing protector 1, thereby effectively preventing contamination of the hearing protector 1, The support base 20 and the hearing protector 1 can be recovered and stored, thereby providing the user with ease of use.

6, the attachment means 43 includes a male velcro 43a coupled to the reel holder 42 and a female hook-and-loop fastener 43b coupled to the object 2 to be attached Respectively,

11A, the male velcro 43a formed on the reel holder 42 is attached to the female velcro 43b coupled to the article 2 so that the reel holder 42 is attached to the article (2).

7 and 8, a magnet 43c or a clip 43d attached to the reel holder 42 in place of the male and female velcro 43a and 43b is attached to the attachment means 43, ), ≪ / RTI >

7, when the attachment means 43 is embodied as a magnet 43c, the reel holder 42 is attached to a metal object 2 which can be easily attached through the magnetic force of the magnet 43c And when the attachment means 43 is embodied as a clip 43d as shown in FIG. 8, the article 2 which can be easily attached to the clip 43d, for example, the upper garment of the wearer, It is preferable to attach the reel holder 42 with the clip 43d interposed therebetween.

The noise reduction control hearing protector 100 according to the present invention is constituted as described above and includes the noise guide hole 10 formed in the hearing protector 1 and the acoustic filter 21 is attached to the noise guide hole 10, The user can selectively control the degree of noise reduction introduced into the user's ear based on the use situation of the user, so that the external noise can be blocked (reduced) It can be effectively used in a construction site or a military unit frequently occurring.

A pair of hearing protectors 100 for noise reduction control according to the present invention are connected to each other through the connecting means 32 and the connecting line 31 to provide convenience to the user for storing and managing the hearing protector 1, (1) can be minimized.

The hearing protector 100 according to the present invention may be connected to the adjustment strap 41 so that the length of the adjustment strap 41 can be easily controlled by the reel holder 42, The hearing protector 1 can be automatically recovered and stored by the operation of the reel holder 42 so that the hearing protector 1 can be prevented from being contaminated effectively, The reel holder 42 can be easily attached to the user's safety helmet or upper clothing and used, thereby ensuring the ease of use of the product.

The hearing protector 100 for noise reduction control according to an embodiment of the present invention having the above-described configuration is used as follows.

First, as shown in FIG. 9A, when it is necessary to reduce the noise appropriately in consideration of the noise situation before the wearer wears the hearing protector 100 for noise reduction control according to the present invention, And then inserts and fixes the sound filter 21 in the noise guide hole 10.

At this time, the user selects an appropriate acoustic filter 21 among a plurality of the acoustic filters 21 having different degrees of noise reduction in consideration of the surrounding noise situation. Here, It is desirable to provide the noise reduction capability in numerical value.

Then, as shown in FIG. 9B, the hearing protector 1 in which the acoustic filter 21 is inserted is inserted into the ear canal of the ear to easily wear the ear protector. Then, the wearer can reduce noise generated in the field through the acoustic filter 21, maintain the state where the external sound source is audible, and perform a smooth operation for a long time in the field where noise is generated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. You will understand the point. It goes without saying that variations can be made by those skilled in the art without departing from the spirit of the present invention. Accordingly, the scope of claim of the present invention is not limited within the scope of the detailed description, but will be defined by the following claims and technical ideas thereof.

1. Hearing protection 2. Items
10. Noise guide ball 20. Noise control means
21. Acoustic filter 21a. Blocking groove
31. Connecting line 32. Connecting means
32a. Connecting protrusion 32b. Connecting ball
32c. The connection groove 32d. Connecting rod
41. Arrangement 42. Reel holder
43. Attachment means 43a. Male Velcro
43b. Female Velcro 43c. magnet
43d. Clip
D. Diameter H. Height
100. Noise Reduction Hearing Protection

Claims (8)

In the hearing protector (1) inserted into the ear canal,
A noise guide hole 10 formed in the longitudinal direction of the hearing protector 1; And
And a noise control means 20 composed of a plurality of acoustic filters 21 inserted and fixed to one end of the noise guide hole 10 to close the noise guide hole 10 to reduce noise, ,
Each of the acoustic filters 21 has a different degree of noise reduction to reduce the noise, so that any one of the acoustic filters 21 selected by the user is inserted into the noise guide hole 10, Use it to reduce noise,
A reel holder 42 for winding or loosening the other end of the adjustable string 41 to adjust the length of the adjustable string 41, And an attachment means (43) for attaching the reel holder (42)
When the user pulls the hearing protector 1 connected to the adjustment strap 41, the adjustment strap 41 wound on the reel holder 42 is loosened and the length of the adjustment strap 41 is increased,
The length of the adjustment strap 41 is reduced by winding the adjustment strap 41 through the operation of the reel holder 42 so that the hearing protector 1 connected to the adjustment strap 41 is returned to the original position In addition,
The attaching means 43 is constituted by a male velcro 43a coupled to the reel holder 42 and a female velcro 43b coupled to the object 2 to be attached,
The reel holder 42 is secured to the article 2 by attaching the male velcro 43a formed on the reel holder 42 to the female velcro 43b coupled to the article 2 (100) for controlling noise reduction.
delete delete delete delete delete delete The method according to claim 1,
A magnet 43c or a clip 43d attached to the reel holder 42 in place of the male velcro 43a and the female velcro 43b by the attachment means 43,
The reel holder 42 can be easily attached or fixed to the metal object 2 through the magnetic force of the magnet 43c or the clip 43d can be inserted into the wearer's clothes and the reel holder 42 can be easily fixed (100) for controlling noise reduction.
KR1020150097998A 2015-07-09 2015-07-09 Noise Reduction adjustment Hearing Protector KR101801016B1 (en)

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KR101801016B1 true KR101801016B1 (en) 2017-12-07

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030159878A1 (en) * 2000-04-06 2003-08-28 Jorgen Hakansson Earplug
US20140190494A1 (en) * 2013-01-04 2014-07-10 3M Innovative Properties Company Selective attenuating earplug

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030159878A1 (en) * 2000-04-06 2003-08-28 Jorgen Hakansson Earplug
US20140190494A1 (en) * 2013-01-04 2014-07-10 3M Innovative Properties Company Selective attenuating earplug

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