JPH09273123A - Sound insulating wall - Google Patents

Sound insulating wall

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Publication number
JPH09273123A
JPH09273123A JP8208796A JP8208796A JPH09273123A JP H09273123 A JPH09273123 A JP H09273123A JP 8208796 A JP8208796 A JP 8208796A JP 8208796 A JP8208796 A JP 8208796A JP H09273123 A JPH09273123 A JP H09273123A
Authority
JP
Japan
Prior art keywords
wall
sound
noise
branched
walls
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
Application number
JP8208796A
Other languages
Japanese (ja)
Inventor
Yuichi Kudo
裕一 工藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP8208796A priority Critical patent/JPH09273123A/en
Publication of JPH09273123A publication Critical patent/JPH09273123A/en
Pending legal-status Critical Current

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  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Abstract

PROBLEM TO BE SOLVED: To increase the sound insulating effect without extending up a sound insulating wall, by providing an inclined wall and branched walls at the upper end of the vertically erected wall, in order to reduce noise brought from roads, railroads, factories, etc. SOLUTION: An inclined wall 2 is provided at the upper end of a vertically erected wall 1 as a soundproof wall to attenuate noise generated in trains T. And branched walls 3, 4 are provided at the ends of the inclined wall 2 and the vertically erected wall 1. And a sound absorbing material is attached to respective wall faces. Noise A of a current collector for pantographs or stringing is reflected by the inclined wall and intensified to turn upward and sound waves going over the branched wall 3 are attenuated owing to the diffraction. Noise B of the rotary moving of wheels rises along the vertically erected wall 1 and it is intensified to turn upward at the front end of the branched wall 4 and the sound waves going over the front end of the branched wall are reflected by the branched wall 3 and attenuated owing to the interference with other sound waves and further, intensified to turn upward because of the resonance between the branched walls 3, 4. Accordingly, the attenuating effect of noise can be improved without extending up the sound insulating wall.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】この発明は、道路,鉄道,工
場等より発生する騒音を低減させるために設けられる防
音壁に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof wall provided for reducing noise generated from roads, railways, factories and the like.

【0002】[0002]

【従来の技術】従来、道路,鉄道,工場等より発生する
騒音の防止対策としては、騒音発生源より直接的に騒音
が伝搬するのを防止するため、防音壁を設置することが
広く採用されている。これは、各種騒音防止対策の中で
防音壁が対策費用が比較的安く、しかも、種々の騒音発
生源に対し効果的であるためである。騒音低減効果をよ
り大きくするためには、防音壁の高さを高くすることが
必要である。しかし防音壁を高くすると、コストアップ
になる(高さが高くなればなるほど施工費等が増し、コ
ストアップになる)。また、日照,景観,眺望,圧迫
感,通風,電波障害,耐風圧荷重等多くの問題がある。
2. Description of the Related Art Conventionally, as a measure for preventing noise generated from roads, railways, factories, etc., it has been widely adopted to install a soundproof wall in order to prevent the noise from being propagated directly from the noise source. ing. This is because sound barriers are relatively inexpensive in various noise prevention measures, and are effective for various noise sources. In order to increase the noise reduction effect, it is necessary to increase the height of the soundproof wall. However, if the soundproof wall is made higher, the cost increases (the higher the height, the higher the construction cost and the like, and the higher the cost). In addition, there are many problems such as sunshine, landscape, view, feeling of oppression, ventilation, radio interference, and wind load resistance.

【0003】さらには直壁だけでは、騒音低減効果が不
十分な場合、防音壁の先端部を騒音発生源側に「く」の
字に折り曲げた先折れ型防音壁や防音壁の先端部を騒音
発生源側に湾曲した湾曲型防音壁があるが、これらは直
壁以上に、前述の事項がより問題となる。
Further, if the noise reduction effect is not sufficient with the straight wall alone, the front end of the soundproof wall or the front end of the soundproof wall formed by bending the front end of the soundproof wall toward the noise source side in a shape of "<" is used. There are curved soundproof walls that are curved on the noise source side, but these are more problematic than straight walls.

【0004】最近交通量の増加、車両の高速化に伴い、
環境騒音問題が深刻になり、他に対応策がないので、前
記の問題点を犠牲にして5m,7m,10mといった高
さの直壁型防音壁、さらには先折れ型防音壁、湾曲型防
音壁が使われている。
With the recent increase in traffic and the speed of vehicles,
As the environmental noise problem becomes serious and there is no other countermeasure, at the expense of the above-mentioned problems, a straight-walled sound-insulating wall having a height of 5 m, 7 m, 10 m, a bent sound-insulating wall, and a curved sound-insulating wall Walls are used.

【0005】しかし、これらの防音壁を用いてもこれら
は防音壁の高さに見合った効果しか期待できない。一般
に、遠方(防音壁より20m程度離れたところ)の位置
では、防音壁の高さを1m増すことにより得られる騒音
低減効果は約1dBである。
However, even if these soundproof walls are used, they can only be expected to have an effect corresponding to the height of the soundproof walls. Generally, at a distant position (at a distance of about 20 m from the soundproof wall), the noise reduction effect obtained by increasing the height of the soundproof wall by 1 m is about 1 dB.

【0006】これら直壁や湾曲型防音壁は、壁を回り込
む(回折)音が多いため、十分な防音効果が得られてい
ないのが現状である。
At present, these straight walls and curved soundproof walls do not have a sufficient soundproofing effect because of a large amount of (diffraction) sound circling around the walls.

【0007】また、鉄道車両の場合、パンタグラフと架
線による集電系の騒音(上部騒音)が発生するが、この
上部騒音の一部は軌道床面から防音壁に沿って進むこと
が実験等により解明されている。
[0007] In the case of a railway vehicle, noise (upper noise) of the current collecting system due to the pantograph and overhead lines is generated, but some of this upper noise travels along the soundproof wall from the track floor surface by experiments and the like. It has been elucidated.

【0008】図21は、従来の鉄道車両100の騒音防
止を図った一例を示し、防音壁(直立壁)101の高さ
を2mとし、この防音壁101から鉄道軌道までを2m
とし、鉄道車両100の騒音発生源を軌道面から1mの
高さとしたものである。この従来の防音対策を基にし
て、直立壁に対して250Hzのオクターブバンドの音
のエネルギーの流れ(音響インテンシティ)を境界要素
法を用いて計算した結果を図22に示す。
FIG. 21 shows an example of noise prevention of a conventional railway vehicle 100. The height of a soundproof wall (upright wall) 101 is 2 m, and the distance from the soundproof wall 101 to the railway track is 2 m.
The noise generation source of the railway vehicle 100 is set at a height of 1 m from the track surface. FIG. 22 shows the result of calculation of the sound energy flow (sound intensity) in the octave band of 250 Hz with respect to an upright wall using the boundary element method based on this conventional soundproofing measure.

【0009】[0009]

【発明が解決しようとする課題】図22の結果から、防
音壁に沿って進んできた音は防音壁を乗り越えてエネル
ギーの大きな音が伝わることがわかる。図中矢印の向き
は音のエネルギーの流れの方向を示し、矢印の長さが長
いほど音のエネルギーが大きいことを示す。
From the results shown in FIG. 22, it can be seen that the sound traveling along the soundproof wall passes through the soundproof wall and is transmitted as a sound with large energy. The direction of the arrow in the figure indicates the direction of the flow of sound energy, and the longer the length of the arrow, the higher the sound energy.

【0010】そこで、この発明は、上記の防音壁を回り
込んで進む音を効果的に防止し壁の高さを高くすること
なく高い防音効果が得られる防音壁を提供することを目
的とする。
SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a soundproof wall which effectively prevents the sound traveling around the soundproof wall and can obtain a high soundproof effect without increasing the height of the wall. .

【0011】[0011]

【課題を解決するための手段】上述の目的を達成するた
め、この発明は、直立壁の上端に反音源側に傾斜した傾
斜壁を設け、直立壁の上端及び傾斜壁の上端に音源側に
向って第1及び第2の再分岐壁が設けられてなるもので
ある。
In order to achieve the above-mentioned object, the present invention provides an inclined wall inclined to the side opposite to the sound source on the upper end of the upright wall, and the upper end of the upright wall and the upper end of the inclined wall on the sound source side. The first and second re-branching walls are provided in the opposite direction.

【0012】[0012]

【発明の実施の形態】以下に、この発明の好適な実施例
を図1及び図2に基づいて説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to FIGS.

【0013】図1は鉄道車両Tが発生する騒音を防止す
るために設けた防音壁を示し、直立壁1の上端に反音源
側に傾斜した傾斜壁2を設け、直立壁1の上端及び傾斜
壁2の上端に音源側に向って第1及び第2の再分岐壁
3,4を設けてある。これら直立壁1,傾斜壁2,第1
及び第2の再分岐壁3,4の内側又は/及び外側に、吸
音材を取付けてもよい。吸音材としては、ロックウー
ル,グラスウール,セラミック,発泡コンクリート等が
使用できる。吸音材はその材質等に応じてボルト,ピ
ン,接着剤,多孔板,金網等によって取付けられる。
FIG. 1 shows a soundproof wall provided to prevent noise generated by the railroad vehicle T. An upright wall 1 is provided with an inclined wall 2 inclined toward the side opposite to the sound source, and the upright wall 1 is inclined at the upper end and the upright wall. First and second re-branching walls 3 and 4 are provided at the upper end of the wall 2 toward the sound source side. These upright wall 1, inclined wall 2, first
A sound absorbing material may be attached to the inside and / or the outside of the second re-branching walls 3 and 4. Rock wool, glass wool, ceramics, foam concrete, or the like can be used as the sound absorbing material. The sound absorbing material is attached by a bolt, a pin, an adhesive, a perforated plate, a wire mesh, etc. according to the material and the like.

【0014】図2は防音壁のみを示し、全高を2320
mm、直立壁1の高さL1 を1310mmとし、第1の再分
岐壁3の基端から第2の再分岐壁4の直立壁1からの図
面上右手方向への水平方向長さを210mmとした。傾斜
壁2に対して再分岐壁3,4は垂直になるようかつ音源
側に向って設けてある。傾斜壁2の長さL2 及び再分岐
壁3,4の高さHは車両の走行騒音の周波数に合せて後
で述べる干渉、共鳴効果を効率良く得られるよう決めら
れる。
FIG. 2 shows only the soundproof wall, and the total height is 2320.
mm, the height L 1 and 1310mm upstanding wall 1, 210 mm horizontal length from the proximal end of the first re-branch wall 3 to the drawing on the right hand direction from the upright wall 1 of the second re-branch wall 4 And The re-branching walls 3 and 4 are provided so as to be perpendicular to the inclined wall 2 and face the sound source side. The height H of the inclined wall 2 of length L 2 and re-branch wall 3, 4 interference described later in accordance with the frequency of the driving noise of the vehicle is determined so as to obtain a resonance effect efficiently.

【0015】これら、直立壁1及び傾斜壁2及び再分岐
壁3,4は、コンクリート,スレート,プラスチック,
鋼板,アルミニウム板等の遮音性能を有する材料にて形
成され、直立壁1の上端に傾斜壁2及び再分岐壁3,4
のユニットをボルト止め等によって固定しても良いし、
直立壁1,傾斜壁2,再分岐壁3,4をすべて一体で形
成しても良い。
These upright wall 1, inclined wall 2 and re-branching walls 3, 4 are made of concrete, slate, plastic,
The upright wall 1 is formed of a material having a sound insulating property such as a steel plate or an aluminum plate.
The unit may be fixed by bolts,
The upright wall 1, the inclined wall 2, and the re-branching walls 3 and 4 may all be integrally formed.

【0016】防音壁で囲まれた高架鉄道では、前述の通
り、パンタグラフと架線の集電系の騒音(上部騒音)及
び車両の転動騒音(下部騒音)及び空力音が主な騒音源
である。これらの音は、図1に示すように、直接防音壁
に伝わる音Aと、軌道床面から防音壁の内面に沿って進
む音Bがある。
As described above, in an elevated railway surrounded by soundproof walls, the noise sources of the pantograph and overhead line current collection system (upper noise), vehicle rolling noise (lower noise), and aerodynamic noise are the main noise sources. . As shown in FIG. 1, these sounds include a sound A that is directly transmitted to the soundproof wall and a sound B that travels from the track floor surface along the inner surface of the soundproof wall.

【0017】音波Bについての減音作用を以下に説明す
ると、防音壁の内面に沿って進んできた音波は、再分岐
壁4の先端で図3に示すような流れに変えられる。まず
音波Bは再分岐壁4の先端で進路のように上方に指
向性が強められた音波となる。また一部は再分岐壁4の
先端で回折し横方向に伝わる。のような横方向に指
向された音波は再分岐壁3,4と傾斜壁2で囲まれ
た空間に取り込まれる。これらの音波は再分岐壁3で反
射され、その後に伝わってくる図4に示す直接波′
′と干渉して打ち消し合い音波が減衰される。この現
象は多くの周波数で起こるが比較的低い周波数で効果的
に減音を図ることができる。また傾斜壁2に対して15
°の角度をもって入力する音波に対して減音効果が高い
ことも本発明者の実験により確認されている(図5参
照)。
The sound reduction effect of the sound wave B will be described below. The sound wave traveling along the inner surface of the soundproof wall is converted into a flow as shown in FIG. 3 at the tip of the re-branching wall 4. First, the sound wave B becomes a sound wave whose directivity is strengthened upward at the tip of the re-branching wall 4 like a path. Further, part of the light is diffracted at the tip of the re-branching wall 4 and is transmitted in the lateral direction. The sound waves directed in the lateral direction as described above are taken into the space surrounded by the re-branching walls 3 and 4 and the inclined wall 2. These sound waves are reflected by the re-branching wall 3 and are transmitted directly thereafter as shown in FIG.
'And the sound waves are attenuated by interfering with each other. This phenomenon occurs at many frequencies, but sound reduction can be effectively achieved at relatively low frequencies. Also, 15 for the inclined wall 2
It has also been confirmed by experiments by the present inventor that the sound reduction effect is high with respect to sound waves input at an angle of ° (see FIG. 5).

【0018】さらに、再分岐壁3,4と傾斜壁2で囲ま
れた空間に取り込まれた音波は再分岐壁3,4の間で反
射を繰り返し、音波の波長と再分岐壁3,4の間隔が適
切に構成された場合、図6に示すような共鳴が起きる。
このとき、共鳴音波の音圧レベルの高い所に着目すると
そこの音波の様子は、図7に示すように、a方向に進む
波とb方向に進む波が存在する。このとき、ホイヘンス
の原理でよく知られているようにひとつの音源から発生
する音波は、新しい波面をつくりながら拡散・進行して
行く。相対する音波′は、図8に示すように、互い
に打ち消し合い、と′は、図9に示すように、傾斜
壁2と垂直方向に合成された音波となる。また、音波
′は傾斜壁で反射される。
Further, the sound wave taken in the space surrounded by the re-branching walls 3 and 4 and the inclined wall 2 is repeatedly reflected between the re-branching walls 3 and 4, and the wavelength of the sound wave and the re-branching walls 3 and 4 are increased. If the spacing is properly configured, resonances as shown in Figure 6 will occur.
At this time, when attention is paid to a place where the sound pressure level of the resonant sound wave is high, there are waves traveling in the a direction and waves traveling in the b direction, as shown in FIG. At this time, as is well known in Huygens' principle, the sound wave generated from one sound source diffuses and travels while creating a new wavefront. The opposing sound waves' cancel each other out, as shown in FIG. 8, and the'and the sound waves vertically combined with the inclined wall 2 as shown in FIG. Also, the sound wave 'is reflected by the inclined wall.

【0019】さらに、図10に示すように、再分岐壁
3,4と傾斜壁2で囲まれた空間に取り込まれずに傾斜
壁上を進む音波と共鳴により上方に指向された音波
′とが合成されるので再分岐壁3,4及び傾斜壁で囲
まれた空間に取り込まれなかった音波も上方指向性を
強められる。
Further, as shown in FIG. 10, a sound wave traveling on the inclined wall without being taken into the space surrounded by the re-branching walls 3 and 4 and the inclined wall 2 is combined with a sound wave 'directed upward by resonance. Therefore, the sound waves that have not been captured in the space surrounded by the re-branching walls 3 and 4 and the slanted walls can also be enhanced in upward directivity.

【0020】以上のように共鳴現象により音波の指向性
が上方へ強く、横方向には弱くなることにより防音壁を
乗り越えて伝わる音は減少される。
As described above, due to the resonance phenomenon, the directivity of the sound wave is strong upward and weak in the lateral direction, so that the sound transmitted over the soundproof wall is reduced.

【0021】また、傾斜壁に沿って進む音波(A)と防
音壁に取り込まれないで進む音波(B)には、図11に
示すように、路長差が生じ再び合成される点S′におい
て干渉しあい音波が減衰する。
Further, as shown in FIG. 11, a point S'combined with the sound wave (A) traveling along the inclined wall and the sound wave (B) traveling without being taken into the soundproof wall is generated again, as shown in FIG. And the sound waves are attenuated.

【0022】音波Aについての減音作用について説明す
ると、図12に示すように、パンタグラフと架線の集電
系の騒音(上部騒音)の内、直接傾斜壁に入射する音波
は、傾斜壁によって反射され、上方指向性が強められ
る。さらに再分岐壁3を乗り越える音波は、図13に示
すように、再分岐壁3の先端でもう一度回折することに
よりエネルギーを弱められて伝達される。
Explaining the sound reduction effect on the sound wave A, as shown in FIG. 12, among the noises (upper noise) of the current collecting system of the pantograph and the overhead line, the sound wave directly incident on the inclined wall is reflected by the inclined wall. As a result, the upward directivity is strengthened. Further, as shown in FIG. 13, the sound wave that goes over the re-branching wall 3 is weakened in energy by being diffracted again at the tip of the re-branching wall 3, and is transmitted.

【0023】図14は、本発明の防音壁について250
Hzオクターブバンドの音のエネルギーの流れをシュミ
レーションした結果を示す(尚このシュミレーションは
防音壁に沿って進んでくる音波についてのみ計算した結
果である)。この図からも明らかなように、防音壁の内
面に沿って進んできた音波は再分岐壁4で上向きに指向
性が強められ、また再分岐壁3,4と傾斜壁2で囲まれ
た空間によってもその領域で音波が上向きに指向され結
果的に本発明の防音壁では指向性が上方へ強く横方向に
は弱まっていることにより防音壁を乗り越えて伝わる音
波が減衰することがわかる。
FIG. 14 shows a soundproof wall of the present invention 250.
The results of simulating the energy flow of sound in the Hz octave band are shown (this simulation is the result of calculation only for sound waves traveling along the sound barrier). As is clear from this figure, the sound waves traveling along the inner surface of the soundproof wall are strengthened in directivity upward by the re-branching wall 4, and the space surrounded by the re-branching walls 3 and 4 and the inclined wall 2 is also increased. It is also understood that the sound waves are directed upward in that region, and as a result, in the soundproof wall of the present invention, the directivity is strongly upward and weakened in the lateral direction, so that the sound waves transmitted over the soundproof wall are attenuated.

【0024】図15に示す実施例は、再分岐壁3,4の
間に任意の高さの小壁5を設けたものを示し、この小壁
5が2以上であってもよい。
In the embodiment shown in FIG. 15, a small wall 5 having an arbitrary height is provided between the re-branching walls 3 and 4, and the small wall 5 may be two or more.

【0025】図16に示す実施例は、傾斜壁2の両端を
延出させたものを示す。
In the embodiment shown in FIG. 16, both ends of the inclined wall 2 are extended.

【0026】次いで、直立壁1に対する傾斜壁2の傾斜
角度を0°(直立壁1上に真っ直ぐ上方に傾斜壁2が延
びる場合)、15°、30°、45°、60°とした場
合の従来の直立壁のみの場合と比較した減音量(dB)
を示すと次の表の如くになった。
Next, when the inclination angle of the inclined wall 2 with respect to the upright wall 1 is 0 ° (when the inclined wall 2 extends straight upward on the upright wall 1), 15 °, 30 °, 45 °, 60 °. Reduced volume (dB) compared to the case of conventional upright walls only
Is shown in the table below.

【0027】[0027]

【表1】 [Table 1]

【0028】図17に、この発明の図1,2に示す実施
例と、従来の直壁のみの場合との夫々の減音効果を示
す。縦軸は音の減音量(dB)横軸は周波数(Hz)を
示し、ほぼ全域で本発明の減衰効果の高いことを示して
いる。このデータは、図18に示すような条件下でシュ
ミレーションして得たものである。
FIG. 17 shows the sound reduction effect of each of the embodiments shown in FIGS. 1 and 2 of the present invention and the case of the conventional straight wall only. The vertical axis represents the sound volume reduction (dB) and the horizontal axis represents the frequency (Hz), indicating that the damping effect of the present invention is high over almost the entire area. This data was obtained by simulating under the conditions shown in FIG.

【0029】図19及び図20は、本発明と直壁の周辺
における音圧レベル(dB)を示すシュミレーション結
果で本発明が壁を乗り越えて伝わる音がより少ないこと
がわかる。
FIGS. 19 and 20 show the present invention and the simulation results showing the sound pressure level (dB) around the straight wall, showing that the present invention transmits less sound over the wall.

【0030】[0030]

【発明の効果】以上説明したように、この発明によれ
ば、防音壁の高さを高くすることなく騒音低減効果が著
しく向上する。
As described above, according to the present invention, the noise reduction effect is significantly improved without increasing the height of the soundproof wall.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の好適な実施例を示す側断面図。FIG. 1 is a side sectional view showing a preferred embodiment of the present invention.

【図2】防音壁のみを示す側面図。FIG. 2 is a side view showing only the soundproof wall.

【図3】音波Bの流れの説明図。FIG. 3 is an explanatory diagram of a flow of a sound wave B.

【図4】音波Bの再分岐壁間における作用の説明図。FIG. 4 is an explanatory view of the action of the sound wave B between the re-branching walls.

【図5】音波の入射角の説明図。FIG. 5 is an explanatory diagram of an incident angle of a sound wave.

【図6】共鳴を説明する図。FIG. 6 is a diagram illustrating resonance.

【図7】共鳴音波の音圧レベルの高い所の説明図。FIG. 7 is an explanatory diagram of a place where a sound pressure level of a resonance sound wave is high.

【図8】合成された音波の説明図。FIG. 8 is an explanatory diagram of synthesized sound waves.

【図9】合成波の説明図。FIG. 9 is an explanatory diagram of a composite wave.

【図10】再分岐壁に取り込まれなかった音波の説明
図。
FIG. 10 is an explanatory diagram of sound waves that have not been captured by the re-branching wall.

【図11】音波(A)と(B)との説明図。FIG. 11 is an explanatory diagram of sound waves (A) and (B).

【図12】音波Aの流れの説明図。FIG. 12 is an explanatory diagram of a flow of a sound wave A.

【図13】再分岐壁を乗り越える音波の説明図。FIG. 13 is an explanatory diagram of a sound wave that rides over a re-branching wall.

【図14】250Hzのオクターブバンドの音のエネル
ギーの流れを示す図。
FIG. 14 is a diagram showing a flow of sound energy in a 250 Hz octave band.

【図15】他の実施例を示す側面図。FIG. 15 is a side view showing another embodiment.

【図16】さらに他の実施例を示す側面図。FIG. 16 is a side view showing still another embodiment.

【図17】減音量を示すグラフ。FIG. 17 is a graph showing the volume reduction.

【図18】シュミレーションの仕方を示す図。FIG. 18 is a diagram showing a simulation method.

【図19】音圧レベルを示すシミュレーション結果の分
布図。
FIG. 19 is a distribution diagram of simulation results showing sound pressure levels.

【図20】図19と同様の分布図。20 is a distribution chart similar to FIG.

【図21】従来例を示す図。FIG. 21 is a diagram showing a conventional example.

【図22】従来の直壁周辺の音のエネルギーの流れを示
す図。
FIG. 22 is a diagram showing a conventional sound energy flow around a straight wall.

【符号の説明】[Explanation of symbols]

1 直立壁 2 傾斜壁 3 第1の再分岐壁 4 第2の再分岐壁 1 Upright wall 2 Inclined wall 3 First re-branching wall 4 Second re-branching wall

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 直立壁の上端に反音源側に傾斜した傾斜
壁を設け、 直立壁の上端及び傾斜壁の上端に音源側に向って第1及
び第2の再分岐壁が設けられてなることを特徴とする防
音壁。
1. An upright wall is provided with an inclined wall that is inclined to the side opposite to the sound source, and first and second re-branching walls are provided toward the sound source side at the upper edge of the upright wall and the upper edge of the inclined wall. A soundproof wall characterized by that.
JP8208796A 1996-02-09 1996-03-11 Sound insulating wall Pending JPH09273123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8208796A JPH09273123A (en) 1996-02-09 1996-03-11 Sound insulating wall

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP8-48099 1996-02-09
JP4809996 1996-02-09
JP8208796A JPH09273123A (en) 1996-02-09 1996-03-11 Sound insulating wall

Publications (1)

Publication Number Publication Date
JPH09273123A true JPH09273123A (en) 1997-10-21

Family

ID=26388325

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8208796A Pending JPH09273123A (en) 1996-02-09 1996-03-11 Sound insulating wall

Country Status (1)

Country Link
JP (1) JPH09273123A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019039283A (en) * 2017-08-29 2019-03-14 株式会社神戸製鋼所 Sound barrier wall

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019039283A (en) * 2017-08-29 2019-03-14 株式会社神戸製鋼所 Sound barrier wall

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