KR100869588B1 - Soundproof member and wall for same - Google Patents

Soundproof member and wall for same Download PDF

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Publication number
KR100869588B1
KR100869588B1 KR1020070054095A KR20070054095A KR100869588B1 KR 100869588 B1 KR100869588 B1 KR 100869588B1 KR 1020070054095 A KR1020070054095 A KR 1020070054095A KR 20070054095 A KR20070054095 A KR 20070054095A KR 100869588 B1 KR100869588 B1 KR 100869588B1
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KR
South Korea
Prior art keywords
concave surface
soundproof member
concave
soundproof
protrusions
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KR1020070054095A
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Korean (ko)
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김동익
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명성산업개발 주식회사
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0029—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with porous surfaces, e.g. concrete with porous fillers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/061—Ashes from fluidised bed furnaces
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0035—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with undulated surfaces
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40—Porous or lightweight materials

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Abstract

A soundproofing member and soundproof wall is provided to prevent breakage of soundproof wall and to absorb sound efficiently. A soundproofing member and soundproof wall comprises a main body(100) in which the hollowed surface(110) is formed facing the noise source, a plurality of protrusions(200) protruded to the hollowed surface to the noise source. The concave extent of the hollowed surface is not fixed through the whole hollowed surface.

Description

방음부재 및 방음벽{Soundproof Member and Wall for Same}Soundproof member and wall for same

도 1은 종래의 방음부재를 도시한 평면도.1 is a plan view showing a conventional soundproof member.

도 2 내지 6은 본 발명에 의한 방음부재의 실시예를 도시한 것으로서,2 to 6 show an embodiment of a sound insulation member according to the present invention,

도 2는 제1실시예의 사시도.2 is a perspective view of a first embodiment;

도 3은 제1실시예의 평면도.3 is a plan view of the first embodiment;

도 4는 제2실시예의 평면도.4 is a plan view of a second embodiment;

도 5는 제3실시예의 평면도.5 is a plan view of a third embodiment;

도 6은 제4실시예의 평면도.6 is a plan view of a fourth embodiment;

**도면의 주요부분에 대한 부호의 설명**** Description of the symbols for the main parts of the drawings **

100 : 본체 110 : 오목한 면100: main body 110: concave surface

120 : 정착부 200 : 돌출부120: fixing unit 200: protrusion

210 : 가상의 면210: virtual plane

본 발명은 환경 건설 분야에 관한 것으로, 상세하게는, 소음을 차단하기 위한 방음벽에 관한 것이다.TECHNICAL FIELD The present invention relates to the field of environmental construction, and more particularly, to a soundproof wall for blocking noise.

산업 발달에 따른 교통수단의 다양화 및 교통량의 증가와 함께 사회 기반 시설(도로, 철도, 공항)의 확충에 따라, 도로주변, 공항 주변, 철도 주변, 학교 주변, 아파트 주변 등에 거주하는 사람들은 각종 차량 들에 의한 소음으로 큰 고통을 받고 있다.With the diversification of transportation means and the increase of traffic volume along with the development of industry, and the expansion of social infrastructure (roads, railways, airports), people living around roads, airports, railways, schools, apartments, etc. The noise caused by the vehicles is suffering greatly.

이러한 소음 공해는 문명의 이기의 부작용으로서, 현대 생활을 살아가는 도시민에 있어 큰 고충거리이며 급기야 각종 민원의 주된 요인이 되고 있다. Such noise pollution is a side effect of civilization's selfishness, and it is a big problem for the urban people living in modern life, and it is becoming a major factor of various civil complaints.

따라서, 선진 각국은 물론 여러 나라에서 도로 등 사회 기반 시설을 설계할 때에 거주 지역이나 특정 지역에서 일정 한도 이하의 소음 기준을 제시하고 있으며, 우리나라에서도 환경부에서 그 기준을 마련하고 있다.Therefore, when designing infrastructure such as roads in developed countries as well as in various countries, noise standards of less than a certain limit are proposed in the residential area or a specific area, and the Ministry of Environment is preparing the standard in Korea.

도 1은 종래의 방음벽을 구성하는 방음부재 중, 본체(10)의 소음원을 향하는 면에 돌출부(20)가 다수 형성된 구조를 도시한 평면도이다.FIG. 1 is a plan view illustrating a structure in which a plurality of protrusions 20 are formed on a surface of a main body 10 facing a noise source among soundproof members constituting a conventional soundproof wall.

이와 같이 소음원을 향하는 면에 다수의 돌출부(20)를 형성하는 경우, 그 돌출부(20)들 사이에 형성되는 홈에서 소음이 공명에 의해 흡음되는 현상이 발생한다.As such, when a plurality of protrusions 20 are formed on a surface facing the noise source, noise is absorbed by resonance in a groove formed between the protrusions 20.

즉, 이러한 구성을 취하는 경우, 차음 효과뿐만 아니라, 재질과 관계없이 흡음 효과까지 얻을 수 있다는 측면에서 바람직하므로, 최근 방음벽에 이러한 구조를 적용하기 위한 연구가 활발히 진행되고 있다.That is, in the case of taking such a configuration, it is preferable in terms of not only the sound insulation effect but also the sound absorption effect regardless of the material. Therefore, studies for applying such a structure to the soundproof wall have been actively conducted in recent years.

그런데, 이는 다음과 같은 점에서 문제로 지적되어 왔다.However, this has been pointed out as a problem in the following points.

첫째, 돌출부(20)가 방음벽 전체의 구조에 비해 전면으로 지나치게 돌출된 구조를 취하므로, 파손의 우려가 높다는 점이다.First, since the protruding portion 20 takes a structure that protrudes excessively to the front side compared to the structure of the entire soundproof wall, there is a high risk of breakage.

둘째, 돌출부(20)의 높이 및 그로 인해 형성되는 홈의 깊이가 일정하므로, 흡음 효율이 그다지 좋지 않다는 점이다.Second, since the height of the protrusion 20 and the depth of the groove formed thereby is constant, the sound absorption efficiency is not so good.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서, 파손의 우려가 적으면서도, 흡음 효율을 증대할 수 있도록 하는 구조의 방음부재 및 방음벽을 제공함을 그 목적으로 한다.The present invention has been made to solve the above problems, and is an object of the present invention to provide a soundproof member and a soundproof wall having a structure that can increase the sound absorption efficiency while reducing the risk of damage.

본 발명은 상술한 바와 같은 목적을 달성하기 위하여, 소음원을 향하는 면에 오목한 면(110)이 형성된 본체(100); 상기 오목한 면(110)에 상기 소음원을 향하여 돌출형성된 다수의 돌출부(200);를 포함하고, 상기 오목한 면(110)의 오목한 정도는 상기 오목한 면(110) 전체에 걸쳐 일정하지 않은 것을 특징으로 하는 방음부재를 제시한다.The present invention in order to achieve the object described above, the main body 100 is formed with a concave surface 110 on the surface facing the noise source; And a plurality of protrusions 200 protruding toward the noise source on the concave surface 110, wherein the concave degree of the concave surface 110 is not constant throughout the concave surface 110. The soundproof member is presented.

상기 다수의 돌출부(200) 상호 사이는 소정 이격된 것이 바람직하다.Preferably, the plurality of protrusions 200 are spaced apart from each other.

상기 오목한 면(110)은 만곡진 형상의 구조를 취할 수 있다.The concave surface 110 may have a curved structure.

상기 만곡진 형상의 오목한 면(110)은 복수가 형성된 구조를 취할 수 있다.The curved concave surface 110 may have a structure in which a plurality is formed.

상기 오목한 면(110)은 계단 형상인 구조를 취할 수 있다.The concave surface 110 may have a stepped structure.

상기 계단 형상의 오목한 면(110)의 오목한 정도는 중심부가 가장 깊고, 양측으로 향할수록 점진적으로 얕게 형성된 구조를 취할 수 있다.The concave degree of the stepped concave surface 110 has a deepest central portion, and may take a structure that is gradually shallower toward both sides.

상기 계단 형상의 오목한 면(110)의 오목한 정도는 중심부의 양측이 가장 깊게 형성된 구조를 취할 수 있다.The concave degree of the stepped concave surface 110 may have a structure in which both sides of the central portion are deeply formed.

상기 본체(100)의 오목한 면(110) 주위부에는 정착을 위한 정착부(120)가 형성된 것이 바람직하다.It is preferable that the fixing unit 120 for fixing is formed around the concave surface 110 of the main body 100.

상기 다수의 돌출부(200)의 전단이 이루는 가상의 면(210)은 실질적으로 평면인 것이 바람직하다.The virtual surface 210 formed by the front end of the plurality of protrusions 200 is preferably substantially flat.

상기 방음부재는 다공성 재질에 의해 형성된 것이 바람직하다.The soundproof member is preferably formed of a porous material.

상기 다공성 재질은 경량 발포 콘크리트, 화산재, 버텀 애쉬(Bottom Ash)를 포함할 수 있다.The porous material may include lightweight foamed concrete, volcanic ash, and bottom ash.

본 발명은 상기 목적을 달성하기 위한 또 다른 수단으로서, 상기 방음부재를 포함하는 방음벽을 제시한다.As another means for achieving the above object, the present invention provides a soundproof wall including the soundproof member.

이하, 첨부도면을 참조하여 본 발명의 실시예에 관하여 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2 이하에 도시된 바와 같이, 본 발명에 의한 방음부재는 기본적으로, 소음원을 향하는 면에 오목한 면(110)이 형성된 본체(100); 오목한 면(110)에 소음원을 향하여 돌출형성된 다수의 돌출부(200);를 포함하여 구성되고, 오목한 면(110)의 오목한 정도는 오목한 면(110) 전체에 걸쳐 일정하지 않은 것을 특징으로 한다.As shown in Figure 2 below, the soundproofing member according to the present invention basically, the main body 100 is formed with a concave surface 110 on the surface facing the noise source; And a plurality of protrusions 200 protruding toward the noise source on the concave surface 110, wherein the concave degree of the concave surface 110 is not constant throughout the concave surface 110.

즉, 본체(100)의 심부에 오목한 면(110)을 형성하고, 그 오목한 면(110) 위에 다수의 돌출부(200)를 형성함으로써, 실질적으로는 돌출부(200)가 방음부재 전체의 구조에 비해 전면으로 돌출되지 않도록 한 것이다.That is, by forming the concave surface 110 in the core portion of the main body 100, and by forming a plurality of protrusions 200 on the concave surface 110, the protrusion 200 is substantially compared to the structure of the entire soundproofing member It does not protrude to the front.

따라서 종래와 같이, 돌출부(200)의 지나친 돌출로 인한 파손의 우려를 감소할 수 있다는 효과가 있다.Therefore, as in the related art, there is an effect that the risk of damage due to excessive protrusion of the protrusion 200 can be reduced.

또한, 도 3에 도시된 바와 같이, 오목한 면(110)의 오목한 정도는 오목한 면(110) 전체에 걸쳐 일정하지 않으므로, 그로 인하여 돌출부(200) 사이에 형성되는 홈들(L1,L2,L3)의 깊이도 서로 상이하게 된다.In addition, as shown in FIG. 3, the degree of concaveness of the concave surface 110 is not constant throughout the concave surface 110, and therefore, the grooves L1, L2, and L3 formed between the protrusions 200 are thereby formed. Depths also differ from one another.

따라서 각 홈마다 서로 상이한 공진 주파수를 갖게 되는바, 전체적으로 더욱 우수한 차음 성능을 나타내게 되는 것이다.Therefore, each groove has a different resonant frequency, which results in a better sound insulation performance as a whole.

이하, 본 발명에 의한 방음부재의 각 구성요소에 관한 구체적 실시예에 대하여 설명한다.Hereinafter, specific examples of each component of the sound insulation member according to the present invention will be described.

상술한 흡음 성능이 충분히 발휘될 수 있도록 하기 위해서는, 돌출부(200) 사이에 충분한 크기의 홈이 형성되도록, 다수의 돌출부(200) 사이가 충분히 이격된 구조를 취하는 것이 바람직하다.In order to sufficiently exhibit the above-described sound absorbing performance, it is preferable to take a structure in which a plurality of protrusions 200 are sufficiently spaced apart so that a groove having a sufficient size is formed between the protrusions 200.

다수의 돌출부(200)의 전단이 이루는 가상의 면(210)(도 3 참조)은 반드시 평면일 필요는 없으나, 실질적으로 평면의 구조를 취하는 것이 위 목적을 달성함에 있어서 가장 바람직하다.The virtual surface 210 (see FIG. 3) formed by the front end of the plurality of protrusions 200 is not necessarily planar, but it is most preferable to achieve the above object by taking a substantially planar structure.

본체(100)의 오목한 면(110) 주위부에는 H 빔 등에 의한 정착을 위한 편평한 구조의 정착부(120)가 형성되는 것이 바람직하다.It is preferable that a fixing unit 120 having a flat structure for fixing by an H beam or the like is formed around the concave surface 110 of the main body 100.

오목한 면(110)은 그 오목한 정도가 오목한 면(110) 전체에 걸쳐 일정하지 않은 구조를 취하기만 하면, 위 목적을 달성하는데 문제가 없다.The concave surface 110 has no problem in achieving the above object, as long as the concave degree takes a structure that is not constant throughout the concave surface 110.

위 오목한 면(110)은 도 2,3에 도시된 바와 같이 만곡진 형상을 취할 수 있고, 이러한 만곡진 형상의 오목한 면(110)은 도 4에 도시된 바와 같이 복수가 형성될 수도 있다.The concave surface 110 may have a curved shape as shown in FIGS. 2 and 3, and the curved concave surface 110 may be formed in plural as shown in FIG. 4.

오목한 면(110)은 도 5,6에 도시된 바와 같이 계단 형상의 구조를 취할 수도 있다.The concave surface 110 may have a stepped structure as shown in FIGS. 5 and 6.

즉, 도 5에 도시된 바와 같이, 계단 형상의 오목한 면(110)의 오목한 정도는 중심부가 가장 깊고, 양측으로 향할수록 점진적으로 얕게 형성된 구조를 취할 수 있다.That is, as shown in Figure 5, the concave degree of the step-shaped concave surface 110 is the deepest in the center, it may take a structure formed gradually shallower toward both sides.

또한, 도 6에 도시된 바와 같이, 계단 형상의 오목한 면(110)의 오목한 정도는 중심부의 양측이 가장 깊게 형성된 구조를 취할 수도 있다.In addition, as shown in Figure 6, the concave degree of the stepped concave surface 110 may have a structure in which both sides of the central portion is formed deepest.

본 발명에 의한 방음부재의 재질은 어느 것을 취하더라도 관계없으나, 중량이 가볍고, 차음 및 흡음 효과가 우수한 다공성 재질에 의해 형성되는 것이 더욱 바람직하다.The material of the sound insulation member according to the present invention may be any material, but is preferably formed of a porous material having a light weight and excellent sound insulation and sound absorption effects.

여기서, 다공성 재질이란, 경량 발포 콘크리트, 화산재, 버텀 애쉬(Bottom Ash) 등의 재료를 의미한다.Here, the porous material means a material such as lightweight foamed concrete, volcanic ash, bottom ash, or the like.

상술한 구조의 방음부재는 블록 또는 판넬의 구조로서 복수가 모여 하나의 방음벽을 형성할 수도 있고, 방음부재 자체가 하나의 방음벽을 형성할 수도 있다.The soundproof member of the above-described structure may have a plurality of blocks or panels to form a single soundproof wall, or the soundproof member itself may form a single soundproof wall.

이상은 본 발명에 의해 구현될 수 있는 바람직한 실시예의 일부에 관하여 설명한 것에 불과하므로, 주지된 바와 같이 본 발명의 범위는 위의 실시예에 한정되어 해석되어서는 안 될 것이며, 위에서 설명된 본 발명의 기술적 사상과 그 근본을 함께 하는 기술적 사상은 모두 본 발명의 범위에 포함된다고 할 것이다.Since the above has been described only with respect to some of the preferred embodiments that can be implemented by the present invention, the scope of the present invention, as is well known, should not be construed as limited to the above embodiments, the present invention described above It will be said that both the technical idea and the technical idea which together with the base are included in the scope of the present invention.

본 발명은 파손의 우려가 적으면서도, 흡음 효율을 증대할 수 있도록 하는 구조의 방음부재 및 방음벽을 제공한다.The present invention provides a soundproof member and a soundproof wall having a structure capable of increasing sound absorption efficiency while reducing the risk of breakage.

Claims (12)

소음원을 향하는 면에 오목한 면(110)이 형성된 본체(100);A main body 100 having a concave surface 110 formed on a surface facing the noise source; 상기 오목한 면(110)에 상기 소음원을 향하여 돌출형성된 다수의 돌출부(200);를 포함하고,And a plurality of protrusions 200 protruding toward the noise source on the concave surface 110. 상기 오목한 면(110)의 오목한 정도는 상기 오목한 면(110) 전체에 걸쳐 일정하지 않은 것을 특징으로 하는 방음부재.Soundproof member, characterized in that the concave degree of the concave surface (110) is not constant over the entire concave surface (110). 제1항에 있어서,The method of claim 1, 상기 다수의 돌출부(200) 상호 사이는 소정 이격된 것을 특징으로 하는 방음부재.Soundproof member, characterized in that the plurality of protrusions 200 are spaced apart from each other. 제1항에 있어서,The method of claim 1, 상기 오목한 면(110)은 만곡진 형상인 것을 특징으로 하는 방음부재.The concave surface 110 is a soundproof member, characterized in that the curved shape. 제3항에 있어서,The method of claim 3, 상기 만곡진 형상의 오목한 면(110)은 복수가 형성된 것을 특징으로 하는 방음부재.The curved surface concave surface 110 is characterized in that a plurality is formed. 제1항에 있어서,The method of claim 1, 상기 오목한 면(110)은 계단 형상인 것을 특징으로 하는 방음부재.The concave surface 110 is a soundproof member, characterized in that the step shape. 제5항에 있어서,The method of claim 5, 상기 계단 형상의 오목한 면(110)의 오목한 정도는 중심부가 가장 깊고, 양측으로 향할수록 점진적으로 얕게 형성된 것을 특징으로 하는 방음부재.The concave degree of the stepped concave surface (110) is the soundproof member, characterized in that the central portion is deepest, gradually formed shallower toward both sides. 제5항에 있어서,The method of claim 5, 상기 계단 형상의 오목한 면(110)의 오목한 정도는 중심부의 양측이 가장 깊게 형성된 것을 특징으로 하는 방음부재.Soundproof member, characterized in that the concave degree of the step-shaped concave surface (110) is formed deepest at both sides of the center. 제1항에 있어서,The method of claim 1, 상기 본체(100)의 오목한 면(110) 주위부에는 정착을 위한 정착부(120)가 형성된 것을 특징으로 하는 방음부재.Soundproof member, characterized in that the fixing portion 120 for fixing in the peripheral portion of the concave surface 110 of the main body 100 is formed. 제1항 내지 제8항 중 어느 한 항에 있어서,The method according to any one of claims 1 to 8, 상기 다수의 돌출부(200)의 전단이 이루는 가상의 면(210)은 실질적으로 평면인 것을 특징으로 하는 방음부재.Soundproof member, characterized in that the virtual surface 210 of the front end of the plurality of protrusions 200 is substantially flat. 제1항에 있어서,The method of claim 1, 다공성 재질에 의해 형성된 것을 특징으로 하는 방음부재.Soundproof member, characterized in that formed by a porous material. 제10항에 있어서,The method of claim 10, 상기 다공성 재질은 경량 발포 콘크리트, 화산재, 버텀 애쉬(Bottom Ash)를 포함하는 것을 특징으로 하는 방음부재.The porous material is a soundproof member, characterized in that it comprises lightweight foamed concrete, volcanic ash, bottom ash (Bottom Ash). 제1항 내지 제8항, 제10항 또는 제11항 중 어느 한 항의 방음부재를 포함하는 방음벽.A soundproof wall comprising the soundproof member of any one of claims 1 to 8, 10 or 11.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210150240A (en) * 2020-06-03 2021-12-10 주식회사 케이디우드테크 A soundproofing wall system that can reduce howling by height difference between wood parts
KR20220163052A (en) * 2021-06-02 2022-12-09 넥센타이어 주식회사 Pneumatic tire with sound absorbing member

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Publication number Priority date Publication date Assignee Title
KR200189328Y1 (en) 1999-12-29 2000-07-15 주식회사삼보 엔.에스.비 Sound absorbing device of road soundproof wall
JP2005299348A (en) * 2004-04-16 2005-10-27 Taisei Corp Sound absorbing plate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200189328Y1 (en) 1999-12-29 2000-07-15 주식회사삼보 엔.에스.비 Sound absorbing device of road soundproof wall
JP2005299348A (en) * 2004-04-16 2005-10-27 Taisei Corp Sound absorbing plate

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210150240A (en) * 2020-06-03 2021-12-10 주식회사 케이디우드테크 A soundproofing wall system that can reduce howling by height difference between wood parts
KR102397998B1 (en) * 2020-06-03 2022-06-14 주식회사 케이디우드테크 A soundproofing wall system that can reduce howling by height difference between wood parts
KR20220163052A (en) * 2021-06-02 2022-12-09 넥센타이어 주식회사 Pneumatic tire with sound absorbing member
KR102600783B1 (en) * 2021-06-02 2023-11-13 넥센타이어 주식회사 Pneumatic tire with sound absorbing member

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