JPH1113026A - Silencing wall - Google Patents
Silencing wallInfo
- Publication number
- JPH1113026A JPH1113026A JP18316897A JP18316897A JPH1113026A JP H1113026 A JPH1113026 A JP H1113026A JP 18316897 A JP18316897 A JP 18316897A JP 18316897 A JP18316897 A JP 18316897A JP H1113026 A JPH1113026 A JP H1113026A
- Authority
- JP
- Japan
- Prior art keywords
- sound
- plate
- sound absorbing
- wall
- absorbing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、新幹軌道や高速自
動車道又は交通量の多い、自動車道に立設して防音する
消音壁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound-absorbing wall that stands on a bullet train, a highway, or a high-traffic road, and that is soundproof.
【0002】[0002]
【従来の技術】一般に防音壁は、金属板でパッケージを
形成。該パッケージ内に、ガラスウールをポリエチレ
ン、ポリビニールなどの袋に充填し、これを内装し、パ
ッケージの表面を金属板で形成した鎧戸で被った構造の
ものを新幹線や自動車道の両側面に立設して防音壁を形
成しているのが現況である。2. Description of the Related Art Generally, a soundproof wall is formed of a metal plate as a package. In the package, glass wool is filled into a bag made of polyethylene, polyvinyl, etc., and the bag is decorated, and the surface of the package is covered with a door made of a metal plate. It is the present situation that a soundproof wall is formed.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、この方
法による防音は、現況では防音壁の効果に期待がもてな
くなった。それは自動車道に於いては、自動車の大型化
と、交通量が極端に増えて、発生する騒音エネルギーが
強力なために、従来のような吸音や遮音のみでは対処で
きなくなった。又新幹線軌道に於いては、大量輸送の為
に列車の輸送回数の増加と、高速化を計りそれが為に、
振動騒音の発生エネルギーが強力となり、又風圧も強力
となって防音壁に内装している吸音材のガラス繊維マッ
トが、短時間で粉末になって、吸音効果がなくなる。等
々の欠点がでてきた。新幹線に設置する防音壁は、高さ
に制限がある。その高さは車輌の窓の高さまでとなって
いる。これは単に視界の問題のみではない。視界の問題
であれば防音壁を高くしても、透明部(透明プラスチッ
ク防音壁)を所要の間隔に立設すれば新幹線車輌は高速
であり、又軌道の幅が狭い為に視界が開ける。これは円
板に複数の穴をあけて回転すれば透視ができる原理と同
じである。防音壁を高くすれば防音効果は良くなるが、
新幹線は軌道が狭い上に風圧が大きい。又、高架の場合
は、防音壁を高く立設する為の基礎作りが困難である。
その上、突風を受ける方向によっては、防音壁が受ける
風圧力は強力となって大変な危険を伴うからである。し
たがって、新幹線の防音壁は壁面が低くて防音効果の良
いものが特に望まれるのである。However, the soundproofing by this method has not been expected to provide the effect of the soundproofing wall in the present situation. In the motorway, since the size of the automobile and the traffic volume increase extremely and the generated noise energy is strong, it is impossible to cope with the conventional sound absorption and sound insulation alone. In addition, in the Shinkansen track, the number of trains to be transported has been increased for mass transportation, and the speed has been increased.
The generated energy of the vibration noise becomes strong and the wind pressure becomes strong, so that the glass fiber mat of the sound absorbing material installed in the soundproof wall becomes powder in a short time, and the sound absorbing effect is lost. There are a number of drawbacks. The noise barrier installed on the Shinkansen has a limited height. Its height is up to the height of the vehicle window. This is not just a matter of visibility. If visibility is a problem, even if the soundproof wall is raised, the Shinkansen vehicle can be operated at high speed if the transparent portions (transparent plastic soundproof wall) are erected at required intervals, and the visibility is wide because the track width is narrow. This is the same principle as that a disc can be seen through by rotating a disc with a plurality of holes. The higher the noise barrier, the better the soundproofing effect,
The Shinkansen has a narrow track and high wind pressure. In addition, in the case of an overpass, it is difficult to make a foundation for erecting the soundproof wall high.
In addition, depending on the direction in which the gust is received, the wind pressure applied to the soundproof wall becomes strong and involves great danger. Therefore, it is particularly desirable that the soundproof wall of the Shinkansen has a low wall surface and a good soundproof effect.
【0004】[0004]
【課題を解決するための手段】上記の目的を達成するた
め、本発明防音壁は従来のように金属板で形成した壁体
の中に吸音材を内装して吸遮音する方法の防音方法では
なくて、音波と音波の干渉効果、即ち発生する騒音の投
射音と投射された音波が壁体内で反射する音波との間に
位相差(逆位相ともいう)を形成させ、両者を干渉させ
ることによって、消音する方法と、空気の流れを制御し
て渦流を発生させ、その渦流によって音波を散乱させて
回析波を防ぐ効果。又、壁面を立体的に形成して吸音面
の拡大を計る。更に立設した壁面の上部に湾曲面を設け
て、該湾曲面の尖端背部に渦流を発生させて、その渦流
によって、壁体頂部を回析する回析波音を散乱させるこ
とによって、回析音を防ぐ等々の複合効果によって防音
することを特徴とする消音壁。In order to achieve the above object, the soundproofing wall according to the present invention is a conventional soundproofing method in which a sound absorbing material is provided inside a wall formed of a metal plate and a sound absorbing material is provided. The effect of the interference between sound waves and sound waves, that is, the formation of a phase difference (also referred to as an anti-phase) between the projected sound of the generated noise and the sound waves reflected by the projected sound waves in the wall, causing the two to interfere with each other. And the effect of controlling the flow of air to generate a vortex, which scatters sound waves to prevent diffraction waves. In addition, the wall surface is formed three-dimensionally so as to enlarge the sound absorbing surface. Further, a curved surface is provided on the upper portion of the wall surface which is erected, and a vortex is generated at the back of the tip of the curved surface, and the vortex scatters a diffracted wave sound diffracting the top of the wall body, thereby providing a diffraction sound. A sound-absorbing wall characterized by soundproofing by a combined effect of preventing noise.
【0005】[0005]
【発明の実施の形態】以下実施例に基づいて、この発明
を更に詳細に説明する。図1は、本発明に係る消音壁の
外観正面図であり、図2は、その横断面図A−A間の断
面を図示したものである。図3は従断面を図示したもの
で、図4はその従断面の一部を詳細に図示したものであ
る。図5、6、7、8は、本発明消音壁の組立て構造を
詳細に図示したもので、図8は壁体1の内側下部に隔壁
板2bを嵌入固定して、該内側面全体に前記防振防音塗
料を塗布して吸音板3bを嵌着固定し、その上に隔壁板
2tを設置する。該隔壁の内側面全体にも防振防音塗料
を塗布して形成する。その上に、吸音板3tの立て方向
に所要の間隔で、リブ状吸音板4を複数設け、一方に湾
曲面を形成した構造の複合吸音板3tを装備して構成さ
れている。図9は該湾曲板の背部を固定するための保護
板である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the following embodiments. FIG. 1 is an external front view of a sound deadening wall according to the present invention, and FIG. 2 is a cross-sectional view taken along a line AA. FIG. 3 shows a minor section, and FIG. 4 shows a part of the minor section in detail. 5, 6, 7, and 8 show in detail the assembly structure of the sound deadening wall of the present invention. FIG. 8 shows a state in which a partition plate 2 b is fitted and fixed to the lower inside of the wall body 1, and The sound-absorbing plate 3b is fitted and fixed by applying a vibration-proof and sound-proof paint, and the partition plate 2t is placed thereon. A vibration-proof and sound-proof paint is applied to the entire inner surface of the partition. A plurality of rib-shaped sound-absorbing plates 4 are provided on the sound-absorbing plate 3t at required intervals in the vertical direction, and a composite sound-absorbing plate 3t having a curved surface formed on one side is provided. FIG. 9 shows a protection plate for fixing the back of the curved plate.
【0006】図10は別構造の消音壁の全体を表示した
表面図で(図11〜図13)はその断面図を示す。この
消音壁は、上部吸音板のみを単一板で形成した吸音板
を、装備した構造である。これは加工が簡単にできるた
めに、加工コストが安く、経済的である。防音効果は図
1よりも稍々劣るも、一般防音壁よりも、格段に良い防
音効果をもつ消音壁である。FIG. 10 is a front view showing the entire sound-absorbing wall of another structure (FIGS. 11 to 13). This sound deadening wall has a structure provided with a sound absorbing plate in which only the upper sound absorbing plate is formed of a single plate. This is economical because the processing can be performed easily and the processing cost is low. Although the soundproofing effect is slightly inferior to that of FIG. 1, the soundproofing wall has a much better soundproofing effect than a general soundproofing wall.
【0007】図14〜15は、湾曲部のみを着脱自在に
形成したものである。これは湾曲部に湾曲リブ状の吸音
板を形成するためには、加工が簡単なためである。それ
は湾曲面のリブ状吸音板と、湾曲面の吸音板を一体構造
に形成するのは極めて困難な為である。又湾曲部のみで
あれば、プラスチック成形が、比較的簡単にできる。し
たがって分割する構造が好ましい。図16、図17は湾
曲リブ4と垂直リブ4を一体に形成した消音壁の全体図
である。図18は断面図。図19は本発明に係る消音壁
に設けた吸音板の吸音孔と音波の関係を巨視的に表した
図である。次に図面に基づいて本発明防音の作用原理を
説明する。図1は消音壁の正面図で、3tは上部の複合
吸音板(金属板と金属板の間に吸音材を介在させた複合
板に複数個の孔を穿って形成した吸音板。以下単に吸音
板と呼稱する)3tの表面に、リブ状吸音板4を立設し
て装着する。装着する該リブは、防音壁を新幹線軌道に
立設する場合の進行方向に向けて傾斜(好ましくは壁表
面に対して約30度前後の傾斜をもたせる。)して装着
する。本発明消音壁の組立て図は、図5〜図9に図示の
ように、壁体1の内側下部に隔壁板2bを嵌着固定し、
該隔壁板及び壁体内部に前記防振防音料即ち、特公昭6
2−58633号発明の名称防振防音塗の塗布が好まし
い。この塗料は周波数特性がない、即ち全周波音に対し
て防音効果が働くからである。次に上記隔壁の上に吸音
板3bを装着し、固定した上に更に隔壁板2tを装着
し、該隔壁板2tと吸音板3b、及び壁体内上部の全体
に、上記防振防音塗料を塗布する。上記の装着した隔壁
板2t及び壁体1の上に、リブ状吸音板を立設して形成
した吸音板3tを装着し、該隔壁板2t及び壁体1の上
部に固定する。上部吸音板3tに設けた湾曲部の保護板
6は、図9のように形成し、壁体1の一方に取付けて湾
曲部の背面に装着して固定する。又湾曲の正面は図3に
示すように、湾曲端部と、壁面に立設したリブ状吸音板
4の端部とは、ブラケット7で連結し固定した構造が好
ましい。これは補強の為である。上記構造の防音壁の従
断面を図3によって更に詳細に説明する。壁体1の内部
は前記のように、隔壁板2t、2bと、吸音板3t、3
bによって、上下二段階の複々数のチャンバーに形成さ
れ、該チャンバーには、音波が入出する透孔が、吸音板
3t、3bに穿たれてあり、その詳細は図4に表した。In FIGS. 14 and 15, only the curved portion is detachably formed. This is because processing is simple to form a curved rib-shaped sound absorbing plate in the curved portion. This is because it is extremely difficult to form the curved sound absorbing plate and the curved sound absorbing plate in an integrated structure. If only the curved portion is used, plastic molding can be relatively easily performed. Therefore, a split structure is preferable. FIGS. 16 and 17 are overall views of a sound deadening wall in which a curved rib 4 and a vertical rib 4 are integrally formed. FIG. 18 is a sectional view. FIG. 19 is a view macroscopically showing the relationship between sound waves and sound absorbing holes of a sound absorbing plate provided on a sound deadening wall according to the present invention. Next, the operation principle of the soundproofing of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a sound absorbing wall, and 3t is an upper composite sound absorbing plate (a sound absorbing plate formed by forming a plurality of holes in a composite plate in which a sound absorbing material is interposed between metal plates. The rib-shaped sound absorbing plate 4 is installed upright on the surface of 3t. The rib to be attached is attached with an inclination (preferably having an inclination of about 30 degrees with respect to the wall surface) in the traveling direction when the soundproof wall is erected on the Shinkansen track. As shown in FIGS. 5 to 9, the partition wall plate 2 b is fitted and fixed to the lower part of the inside of the wall body 1 as shown in FIGS.
The vibration-proof and sound-insulating material, ie, Japanese Patent Publication No. Sho 6
The application of the name of the invention of 2-58633 is preferred. This is because this paint has no frequency characteristics, that is, it has a soundproofing effect for all frequency sounds. Next, the sound-absorbing plate 3b is mounted on the partition wall, and the partition wall plate 2t is further mounted on the fixed partition wall, and the vibration-proof and sound-proof paint is applied to the partition wall plate 2t, the sound absorbing plate 3b, and the entire upper part of the wall. I do. A sound absorbing plate 3t formed by erecting a rib-shaped sound absorbing plate is mounted on the mounted partition plate 2t and the wall 1, and fixed on the partition 2t and the upper portion of the wall 1. The protection plate 6 of the curved portion provided on the upper sound absorbing plate 3t is formed as shown in FIG. 9 and is attached to one side of the wall body 1 and fixed to the back surface of the curved portion by being attached thereto. As shown in FIG. 3, the front surface of the curved portion is preferably structured such that the curved end portion and the end portion of the rib-shaped sound absorbing plate 4 erected on the wall surface are connected and fixed by a bracket 7. This is for reinforcement. The sub-section of the soundproof wall having the above structure will be described in more detail with reference to FIG. As described above, the inside of the wall body 1 includes the partition plates 2t and 2b and the sound absorbing plates 3t and 3t.
b, a plurality of upper and lower chambers are formed in a plurality of chambers. Through holes through which sound waves enter and exit are formed in the sound absorbing plates 3t and 3b, and details thereof are shown in FIG.
【0008】次に、上記構造の防音壁を新幹線軌道の両
側に立設した防音効果の作用原理を図面に基づいて、詳
細に説明する。新幹線は時速220kmで走行している。
これは、秒速61mであり、したがって立設した防音壁
は、瞬間的に、これに見合う風圧を受ける。又発生する
騒音は、風圧によって一種のドップラ効果を誘発して騒
音が増大する。即ち音圧エネルギーが強力となる。した
がって従来の防音壁に内装しているポリ袋入りの吸音材
(ガラス繊維)は、この風圧と音圧によって粉末になり
防音効果に期待がもてない。又壁の高さが窓ぎわまでに
制限されている為でもある。更に近年は超高速化とな
り、時速350km、秒速にすると97m/秒となる。し
たがって、発生する振動騒音のエネルギーは想像に絶す
るものがある。本発明消音壁は、各種の防音効果の総合
を計って、これに対処できる極めて高度な技術を駆使し
た消音壁である。Next, the operation principle of the soundproof effect in which the soundproof walls having the above structure are provided on both sides of the Shinkansen track will be described in detail with reference to the drawings. The Shinkansen runs at 220 km / h.
This is a speed of 61 m / s, so that the standing soundproof wall is instantaneously subjected to a corresponding wind pressure. The generated noise induces a kind of Doppler effect by the wind pressure, and the noise increases. That is, the sound pressure energy becomes strong. Therefore, the sound-absorbing material (glass fiber) contained in the conventional sound-insulating wall and contained in a polybag becomes powder due to the wind pressure and the sound pressure, and the soundproofing effect is not expected. It is also because the height of the wall is restricted to the edge of the window. Furthermore, in recent years, the speed has become extremely high, and the speed becomes 350 km / h, and the speed becomes 97 m / sec. Therefore, the energy of the generated vibration noise is unimaginable. The sound-absorbing wall of the present invention is a sound-absorbing wall utilizing an extremely high level of technology capable of coping with various soundproofing effects.
【0009】列車が走行して発生する騒音と風圧は、壁
面に立設したリブ状吸音板によって気流が変化する。該
リブ状吸音板4は、前記のように進行方向へ30°前後
の角度で傾斜して立設するのが望ましい。これはリブ状
吸音板の表面の空気の流れが速くなり、リブの先端裏面
に渦流が発生するからである。この渦流によって投射さ
れた音は、散乱され騒音の一部は減衰する。又該防音壁
は、リブ状吸音板を多数設け、吸音面積を増大して吸音
効果を大きくしている。次に消音効果に付いて説明す
る。該消音壁に投射された音波は、上部の吸音板3tの
吸音孔より入射して隔壁板2tで区画された各チャンバ
内に入る。この入射音を図18によって詳細に説明す
る。この略図は一般に広く回析波の原理として公知され
たハイヘンスの法則を引用した図である。この略図によ
って説明する[0009] The noise and wind pressure generated by the running of the train are changed by a rib-shaped sound absorbing plate provided on the wall surface. It is desirable that the rib-shaped sound absorbing plate 4 be erected at an angle of about 30 ° in the traveling direction as described above. This is because the flow of air on the surface of the rib-shaped sound absorbing plate becomes faster, and a vortex is generated on the back surface of the tip of the rib. The sound projected by the vortex is scattered and a part of the noise is attenuated. Further, the soundproof wall is provided with a number of rib-shaped sound absorbing plates to increase the sound absorbing area to enhance the sound absorbing effect. Next, the silencing effect will be described. The sound waves projected on the sound deadening wall enter through the sound absorbing holes of the upper sound absorbing plate 3t and enter the respective chambers defined by the partition plate 2t. This incident sound will be described in detail with reference to FIG. This diagram is a diagram that quotes Heigens' law, which is generally widely known as the principle of diffraction waves. Explained by this schematic diagram
【0010】2Aの吸音板に穿った吸音孔hに入射する
音Sは、矢印のように投射されて吸音孔に入る。このと
き、吸音孔は音圧を受けて振動して伸縮する。この運動
によって孔の表面の空気を振動させる。即ち音圧エネル
ギーを、空気の振動エネルギーに変換して、放熱によっ
て消費する。これが吸音の原理である。吸音孔で減音さ
れた音波は、孔hの出口で球面波となり回析し、回析波
dとなって伝播する。この回析波の回析角度は2A、2
Bに比較のように、孔の径が小さいほど深く、孔の径が
大きくなるほど浅くなって伝播する。上記のように、投
射音が上部吸音板3tの吸音孔より、上部隔壁2tで区
画し、形成された各チャンバ内に入射すると、入射音は
図19の2Aのように孔の周囲に、矢印のように一部は
回析波となる。該チャンバ内側面に塗布された防振防音
塗料によって、チャンバ内の反射響鳴を抑制されて減音
する。投射音は更に次の下部吸音板3b及び、下部隔壁
2bによって形成された各チャンバ内に、吸音板3bの
吸音孔より前記と同じく回析波となって入射し、反射共
鳴音するエネルギーは、前記同様、内側面に塗布された
防振防音塗料によって減衰された音波は、次に入射して
くる音波との間に位相差が生じる。この両者の位相差が
干渉効果となって音波は消滅又は減衰する。これらの作
用は連続的に発生する。以上が消音効果の概要である。
次に立設した消音壁の上端に発生する回析波音について
説明する。一般に防音壁の上部に投射された音波は直線
的に伝播するものと、壁の頂部を曲がって裏側に入る音
即ち回析波音があり、この回析音を防がねば、防音壁の
防音効果がない。これを防止する目的で防音壁の上部を
内側に所要の曲面をもたせて湾曲面を形成する。これは
特願昭49−29496号に記載のように、軌道又は車
道の両側面に、上部を内側に湾曲した防音壁を立設した
内を、車両が走行すると風圧が発生する。発生した風圧
は空気を吹き上げて上昇気流を発生する。この上昇気流
の速度は、車輌の速度に比例するのは当然であるが、こ
の上昇気流の速度は、壁面を離れた位置は遅く、壁面及
び湾曲面に沿って上昇する気流がもっとも速い(流体力
学による)したがって、防音壁の湾曲面の上端部の背部
に渦流が発生することは、必然的である。したがってこ
の渦流中に投射される回析波音は散乱され消滅する。
(図10、11、12、13)に示すように、消音壁の
上面吸音板9のみを単一板で形成すると、立設するリブ
状吸音板の立設加工が簡単にできるので加工コストを安
くできる。又壁体内に音を取り込みやすくなる等の効果
を有する防音壁を提供できる。The sound S entering the sound absorbing hole h formed in the sound absorbing plate 2A is projected as shown by the arrow and enters the sound absorbing hole. At this time, the sound absorbing hole vibrates and expands and contracts under the sound pressure. This movement causes the air on the surface of the hole to vibrate. That is, the sound pressure energy is converted into the vibration energy of air and consumed by heat radiation. This is the principle of sound absorption. The sound wave reduced by the sound absorbing hole becomes a spherical wave at the exit of the hole h, diffracts, and propagates as a diffracted wave d. The diffraction angle of this diffraction wave is 2A, 2
As compared with B, the smaller the hole diameter, the deeper the hole, and the larger the hole diameter, the shallower the light propagates. As described above, when the projection sound is divided by the upper partition wall 2t from the sound absorbing hole of the upper sound absorbing plate 3t and enters each formed chamber, the incident sound is surrounded by an arrow around the hole as shown in 2A of FIG. A part becomes a diffraction wave as shown in FIG. The anti-vibration sound-proof paint applied to the inner surface of the chamber suppresses the reflected sound in the chamber and reduces the sound. The projected sound further enters each chamber formed by the next lower sound absorbing plate 3b and the lower partition 2b from the sound absorbing hole of the sound absorbing plate 3b as a diffracted wave as described above, and the energy of the reflected resonance sound is: In the same manner as described above, the sound wave attenuated by the vibration-proof and sound-insulating paint applied to the inner surface has a phase difference with the next incoming sound wave. The sound wave disappears or attenuates due to the interference between the two phases. These actions occur continuously. The above is the outline of the muffling effect.
Next, the diffraction wave sound generated at the upper end of the standing sound deadening wall will be described. Generally, the sound wave projected on the upper part of the soundproof wall has a sound propagating linearly and a sound that bends at the top of the wall and enters the back side, that is, a diffracted wave sound, and if this diffracted sound is not prevented, the soundproofing effect of the soundproof wall is obtained. There is no. In order to prevent this, a curved surface is formed by giving a required curved surface inside the upper part of the soundproof wall. As described in Japanese Patent Application No. 49-29496, wind pressure is generated when a vehicle travels inside a soundproof wall having an upper portion curved inside on both sides of a track or a road. The generated wind pressure blows up air to generate an updraft. Naturally, the speed of the rising airflow is proportional to the speed of the vehicle. However, the speed of the rising airflow is slow at a position apart from the wall surface, and the speed of the airflow rising along the wall surface and the curved surface is the fastest (fluid flow). Therefore, it is inevitable that a vortex is generated behind the upper end of the curved surface of the sound insulating wall. Therefore, the diffraction wave sound projected into the vortex is scattered and disappears.
As shown in FIGS. 10, 11, 12, and 13, when only the upper sound absorbing plate 9 of the sound deadening wall is formed by a single plate, the rib-shaped sound absorbing plate to be erected can be easily erected, thereby reducing the processing cost. Can be cheap. Further, it is possible to provide a soundproof wall having an effect that sound can be easily taken into the wall body.
【0011】請求項4は上部吸音板3tの湾曲面部のみ
を分離し、別途に加工して装着すると、施工が簡単にで
きる。これは(図15、16)に示すとおりである。
又、湾曲部にリブ状吸音板を立設するのは、極めて加工
が困難であるが、このような場合、透明プラスチック材
で成形加工すれば、成形加工が簡単で透視性のある防音
壁ができる効果は極めて大きい。According to a fourth aspect of the present invention, when only the curved surface portion of the upper sound absorbing plate 3t is separated and separately processed and mounted, the construction can be simplified. This is as shown in FIGS.
Also, it is extremely difficult to form a rib-shaped sound-absorbing plate on a curved portion. In such a case, if a molding process is made of a transparent plastic material, a sound-insulating wall which is easy to form and has a transparent property can be obtained. The effect that can be achieved is extremely large.
【0012】[0012]
【発明の効果】以上のように本発明消音壁は音波と音
波、即ち投射音と反射音の相互間に位相差を形成させ
て、この両者の音波と音波を干渉させ消音する。消音効
果と、壁体上面に立設するリブ状吸音板によって、吸音
面積を増大することによって、吸音効果を増大させる。
又リブ状吸音板を進行方向に傾斜させることによって渦
流を発生させ投射音を散乱して減音する。更に壁面上部
に湾曲面や湾曲リブ吸音板を形成し回析波音を防ぐ等々
の、複々合の防音効果を形成した消音壁である。次に投
射音と反射音の位相差による干渉効果に付いて説明す
る。図20Aのように消音壁の試料を設置し、スピーカ
ーより投射音を45°の角度をもたせて該消音壁試料に
投射し、これを反対位置でマイクロホンに反射音を受け
て、この投射音と反射音の周波数を比較した結果、第4
図Bのような位相差を生じた波形が得られ、次にこの両
波形を合成すると第4図Cのように波形の山と谷とが重
なり合って干渉し、この干渉効果によって音波は連続し
て消滅ないし減衰される。請求項6に記載のように吸音
板を金属板、プラスチック、無機質材などの単一材で形
成すると、吸音効果はやや劣るが加工が極めて簡単にで
きる。以上説明したように本発明に係る消音壁を新幹線
軌道や高速自動車に立設して防音すると、次のような防
音の諸効果が働く、即ち干渉効果による消音と、消音壁
の表面にリブ状吸音板を複数立設して吸音面積の増大
と、該リブ状吸音板を進行方向に傾斜させることによっ
て、その背部に渦流を発生させ、その渦流で音波を散乱
させて減音する効果。立設した消音壁の上部に湾曲面を
設け、気流の流れを変えることによって、該湾曲の突端
背部に渦流を発生させて、壁体頂上を回析する回析波音
を渦流によって散乱させて防ぐ効果等の、複合の防音効
果が相乗して、極めて優秀な防音効果をもつ消音壁であ
る。As described above, the sound deadening wall of the present invention forms a phase difference between sound waves and sound waves, that is, a projected sound and a reflected sound, and interferes with both of the sound waves and the sound waves to muffle the sound. The sound absorbing effect is increased by increasing the sound absorbing area by the sound absorbing effect and the rib-shaped sound absorbing plate erected on the upper surface of the wall.
In addition, by inclining the rib-shaped sound absorbing plate in the traveling direction, a vortex is generated, and the projected sound is scattered and reduced. Further, the sound deadening wall has a double-layered soundproofing effect, such as forming a curved surface or a curved rib sound absorbing plate on the upper wall surface to prevent diffraction wave noise. Next, the interference effect due to the phase difference between the projected sound and the reflected sound will be described. As shown in FIG. 20A, a sound-absorbing wall sample is installed, and a projection sound is projected from the speaker to the sound-absorbing wall sample at an angle of 45 °. As a result of comparing the frequencies of the reflected sounds, the fourth
A waveform having a phase difference as shown in FIG. B is obtained. Then, when these two waveforms are combined, the peaks and valleys of the waveform overlap and interfere with each other as shown in FIG. 4C. Disappears or is attenuated. When the sound-absorbing plate is formed of a single material such as a metal plate, plastic, or an inorganic material as described in claim 6, the sound-absorbing effect is slightly inferior, but processing can be extremely easily performed. As described above, when the sound deadening wall according to the present invention is installed on a Shinkansen track or a high-speed vehicle and soundproofed, various soundproofing effects such as the following are provided. A plurality of sound absorbing plates are provided upright to increase the sound absorbing area, and by inclining the rib-shaped sound absorbing plates in the traveling direction, a vortex is generated on the back of the plate, and sound waves are scattered by the vortex to reduce sound. A curved surface is provided at the top of the standing sound-absorbing wall, and by changing the flow of the airflow, a vortex is generated at the back of the tip of the curve to prevent the diffracted wave sound diffracting at the top of the wall from being scattered by the vortex. It is a sound-absorbing wall that has an extremely excellent sound-proofing effect, with the combined sound-proofing effects such as effects.
【図1】本発明に係る消音壁の一例を示す正面図であ
る。FIG. 1 is a front view showing an example of a sound deadening wall according to the present invention.
【図2】図1のA−Aの断面図である。FIG. 2 is a sectional view taken along line AA of FIG.
【図3】図1の縦断面図である。FIG. 3 is a longitudinal sectional view of FIG.
【図4】図3の吸音板に穿った吸音孔の一部を詳細に明
示した図である。図5、図6、図7、図8、図9は本発
明消音壁の一例の組立てを示す図である。FIG. 4 is a view showing in detail a part of a sound absorbing hole formed in the sound absorbing plate of FIG. 3; FIGS. 5, 6, 7, 8 and 9 are views showing the assembly of an example of the sound deadening wall of the present invention.
【図5】上部吸音板で、表面に複数のリブ状吸音板を立
設し、上部に湾曲面を有する吸音板である。FIG. 5 is an upper sound absorbing plate in which a plurality of rib-shaped sound absorbing plates are erected on a surface and a curved surface is provided on an upper portion.
【図6】上部隔壁板である。FIG. 6 is an upper partition plate.
【図7】下部吸音板である。FIG. 7 is a lower sound absorbing plate.
【図8】壁体内下部に隔壁板を装着し、防振防音塗料を
塗布した図である。FIG. 8 is a view in which a partition plate is attached to a lower portion of the inside of a wall, and a vibration-proof and sound-proof paint is applied.
【図9】湾曲板の背部を固定する補強板である。FIG. 9 is a reinforcing plate for fixing the back of the curved plate.
【図10】他の消音壁(請求項3)の正面図である。FIG. 10 is a front view of another sound deadening wall (claim 3).
【図11】図10の縦断面図である。11 is a longitudinal sectional view of FIG.
【図12】図11の一部を詳細に示した図である。FIG. 12 is a diagram showing a part of FIG. 11 in detail.
【図13】図10の横断面A−Aを示した図である。FIG. 13 is a view showing a cross section AA of FIG. 10;
【図14】湾曲部にリブ状吸音板を立設した図である。FIG. 14 is a diagram in which a rib-shaped sound absorbing plate is erected on a curved portion.
【図15】図14の側面図である。FIG. 15 is a side view of FIG. 14;
【図16】本発明消音壁の一例で、表面部に立設するリ
ブ状吸音板を、該表面に対して垂直に立設装着した消音
壁の正面図である。FIG. 16 is a front view of an example of the sound-absorbing wall of the present invention, in which a rib-shaped sound-absorbing plate erected on a surface portion is vertically installed on the surface.
【図17】図16の斜視図である。FIG. 17 is a perspective view of FIG. 16;
【図18】図16のA−Aの断面図である。FIG. 18 is a sectional view taken along line AA of FIG.
【図19】投射音と吸音孔及び回析波の関係を巨視的に
表した図である。FIG. 19 is a diagram macroscopically showing a relationship between a projection sound, a sound absorbing hole, and a diffraction wave.
【図20】本発明消音壁の、投反射音の位相差を測定す
る装置Aと、位相差による干渉効果の原理を図表した図
である。FIG. 20 is a diagram illustrating a device A for measuring the phase difference between the projected and reflected sounds of the sound deadening wall of the present invention, and the principle of the interference effect due to the phase difference.
1 壁体 2t、2b 隔壁板 3t、3b 吸音板 4、4p リブ状吸音板 5、5’ 湾曲部 6 保護板 7 ブラケット 8 受台 9、9’ 単一吸音板 S 投射音 h 吸音孔 d 回析波音 2A、2B 吸音板 2C 遮音壁 A 測定装置 B 位相差による干渉装置 DESCRIPTION OF SYMBOLS 1 Wall 2t, 2b Partition plate 3t, 3b Sound absorbing plate 4, 4p Rib-shaped sound absorbing plate 5, 5 'Bending part 6 Protective plate 7 Bracket 8 Receiving stand 9, 9' Single sound absorbing plate S Projection sound h Sound absorption hole d times Analyzed sound 2A, 2B Sound absorbing plate 2C Sound insulation wall A Measuring device B Interference device by phase difference
Claims (6)
などの硬質材で形成した箱状の壁体1の内部下方を、隔
壁板2bで区画し固定する。この区画した区画室の内側
面全体に、金属粉又は重質量物の粉末を混入し、均一分
散させて形成してなる防振防音塗料を塗布する。上記構
造の壁体内の隔壁板2bの上に、パネルとパネルの間に
防音材、即ち石綿、ガラス繊維、ロックウール等の無機
質又は有機質繊維をパネル状に形成した吸音材を介在さ
せた積層板に複数個の秀孔を穿って形成した吸音板3b
を嵌着し、その上に、隔壁板2tを装着する。装着した
吸音板3b及び隔壁板2tと、壁体1内の上部にも前記
防振防音塗料を塗布して形成する。上記構造の上部へ、
吸音板3tの上面にリブ状に形成した吸音板4を複数立
設して装着した構造の吸音板3tの長手方向の一端に更
に湾曲面5を設けて形成した構造の吸音板3tを装着し
たことを特徴とする消音壁。1. A lower portion of a box-shaped wall 1 made of a hard material such as a metal plate, plastic, a wooden plate, or an inorganic material is partitioned and fixed by a partition plate 2b. A vibration-proof and sound-proof paint formed by mixing and uniformly dispersing metal powder or heavy-mass powder is applied to the entire inner surface of the partitioned compartment. A laminated board in which a soundproofing material, that is, a sound absorbing material in which an inorganic or organic fiber such as asbestos, glass fiber, rock wool or the like is formed in a panel shape is interposed between the panels, on the partition plate 2b in the wall body having the above structure. Sound absorbing plate 3b formed by drilling a plurality of holes
And a partition plate 2t is mounted thereon. The anti-vibration and sound-proof paint is also applied to the mounted sound absorbing plate 3b, the partition plate 2t, and the upper part in the wall body 1. To the top of the above structure,
A sound absorbing plate 3t having a structure in which a curved surface 5 is further provided at one longitudinal end of the sound absorbing plate 3t having a plurality of rib-shaped sound absorbing plates 4 mounted on the upper surface of the sound absorbing plate 3t is mounted. A sound-absorbing wall characterized by that.
を、吸音板3tの表面に対して所要の角度をもたせて、
傾斜して装着したことを特徴とする消音壁。2. The rib-shaped sound absorbing plate 4 according to claim 1.
At a required angle with respect to the surface of the sound absorbing plate 3t,
A sound-absorbing wall characterized by being mounted at an angle.
上部吸音板9を、単一板、即ち金属板に複数の透孔を穿
って形成した吸音板9にリブ状吸音板Pを装着し、該リ
ブ状吸音板端部と湾曲板9’を、ブラケット7で連結固
定し、背部に保護カバー6を装着して形成したことを特
徴とする消音壁。3. The sound deadening wall according to claim 2, wherein
The upper sound absorbing plate 9 is provided with a rib-shaped sound absorbing plate P on a single plate, that is, a sound absorbing plate 9 formed by drilling a plurality of through holes in a metal plate, and the rib-shaped sound absorbing plate end and the curved plate 9 ' A sound-absorbing wall characterized in that the sound-absorbing wall is connected and fixed by a bracket 7 and is formed by attaching a protective cover 6 to a back portion.
部5を、該吸音板3tとは、個別に加工してこれを装着
するように構造したことを特徴とする消音壁。4. A sound deadening wall, wherein the curved portion 5 of the upper sound absorbing plate 3t according to claim 1 is processed separately from the sound absorbing plate 3t and is attached thereto.
部に複数のリブ状吸音板4を垂直に立設して装着固定し
たことを特徴とする消音壁。5. A sound-absorbing wall, wherein a plurality of rib-shaped sound-absorbing plates 4 are vertically mounted and fixed on the surface of the upper sound-absorbing plate 3t according to claim 1.
スチック、無機質材等の単一材で形成したことを特徴と
する消音壁。6. A sound-absorbing wall, wherein the sound-absorbing plate according to claim 1 is formed of a single material such as a metal plate, plastic, or an inorganic material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18316897A JPH1113026A (en) | 1997-06-23 | 1997-06-23 | Silencing wall |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18316897A JPH1113026A (en) | 1997-06-23 | 1997-06-23 | Silencing wall |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH1113026A true JPH1113026A (en) | 1999-01-19 |
Family
ID=16130983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18316897A Pending JPH1113026A (en) | 1997-06-23 | 1997-06-23 | Silencing wall |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH1113026A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMO20090216A1 (en) * | 2009-08-31 | 2011-03-01 | Hesperia S A S Di Donato Franco & C | COUNTERFRAME FOR DOORS OR WINDOWS |
WO2011024151A3 (en) * | 2009-08-31 | 2011-07-07 | Hesperia S.A.S. Di Donato Franco & C. | Counterframe for doors or windows, crosspiece element and spacer element for counterframe |
CN103590343A (en) * | 2012-08-17 | 2014-02-19 | 成都中弘轨道交通环保产业股份有限公司 | Continuous arc steel plate reflecting sound-proof device |
KR101457015B1 (en) * | 2013-12-24 | 2014-11-12 | 나상철 | A sound proof and shelding fence |
CN112962480A (en) * | 2021-02-01 | 2021-06-15 | 浙江广厦建设职业技术大学 | A barrier of making an uproar falls in 3D printing cement for highway |
CN114541290A (en) * | 2022-03-23 | 2022-05-27 | 西南大学 | Sound-absorbing and sound-insulating wall with concave conical surface and porous microstructure |
-
1997
- 1997-06-23 JP JP18316897A patent/JPH1113026A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMO20090216A1 (en) * | 2009-08-31 | 2011-03-01 | Hesperia S A S Di Donato Franco & C | COUNTERFRAME FOR DOORS OR WINDOWS |
WO2011024151A3 (en) * | 2009-08-31 | 2011-07-07 | Hesperia S.A.S. Di Donato Franco & C. | Counterframe for doors or windows, crosspiece element and spacer element for counterframe |
CN103590343A (en) * | 2012-08-17 | 2014-02-19 | 成都中弘轨道交通环保产业股份有限公司 | Continuous arc steel plate reflecting sound-proof device |
KR101457015B1 (en) * | 2013-12-24 | 2014-11-12 | 나상철 | A sound proof and shelding fence |
CN112962480A (en) * | 2021-02-01 | 2021-06-15 | 浙江广厦建设职业技术大学 | A barrier of making an uproar falls in 3D printing cement for highway |
CN114541290A (en) * | 2022-03-23 | 2022-05-27 | 西南大学 | Sound-absorbing and sound-insulating wall with concave conical surface and porous microstructure |
CN114541290B (en) * | 2022-03-23 | 2023-01-13 | 西南大学 | Sound-absorbing and sound-insulating wall with concave conical surface and porous microstructure |
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