JPH0571109A - Multilayer sound absorbing panel - Google Patents
Multilayer sound absorbing panelInfo
- Publication number
- JPH0571109A JPH0571109A JP3231374A JP23137491A JPH0571109A JP H0571109 A JPH0571109 A JP H0571109A JP 3231374 A JP3231374 A JP 3231374A JP 23137491 A JP23137491 A JP 23137491A JP H0571109 A JPH0571109 A JP H0571109A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- sound absorbing
- porous material
- hard porous
- sound
- 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
Classifications
-
- 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
- E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
- E01F8/0076—Cellular, e.g. as wall facing
- E01F8/0082—Cellular, e.g. as wall facing with damping material
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は，自動車道路，鉄道等の
側壁に設けて騒音を低減させる等の目的に使用する多層
吸音パネルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer sound absorbing panel which is provided on a side wall of an automobile road, a railroad or the like and used for the purpose of reducing noise.
【０００２】[0002]
【従来の技術】自動車や鉄道などの走行音を低減させる
ため路線の側壁に吸音パネルを設けたり，トンネル内壁
に吸音パネルを内貼りして走行音や換気用送風機の騒音
を低減させ，騒音防止が図られている。このような騒音
低減用の吸音パネルに求められる要件は，吸音効果は勿
論のことながら，屋外に施設されることによる汚染や耐
候劣化等に耐え得ることも重要である。また自動車，鉄
道，送風機等の騒音発生源の発生周波数は，低周波から
高周波まで広帯域な成分が含まれているため，全ての音
域に効果的に作用し，且つダストや振動，風雨，日射等
の過酷な設置条件に耐え得るものとしなければならな
い。上記要件を得んとする吸音パネルとして，例えば，
特開昭５９−８０８１１号公報に開示される消音パネ
ル，あるいは，ＪＩＳ−Ａ−６３０５に示される吸音用
孔明きアルミニウムパネルがある。前例のものは，図８
に示すように，金属あるいはセラミック等を焼結してな
る硬質多孔質吸音材２０の全面に多数の小孔２１を設け
て，背後の空気層に連通することにより吸音性能の向上
を図ったもので，壁面である強度部材２３の音源側に空
気層を介して付設される。また，後例のものは，図９に
示すように，グラスウール，ウレタン，ロックウールな
どの多孔質吸音材２４の前面に，多数の小孔を貫通させ
た多孔板２５を配し，壁面である強度部材２３の音源側
に付設される。上記多孔板２５は吸音材の飛散を防止す
るためのもので，金属，木質，セメント等の材質により
構成される。ＪＩＳ−Ａ−６３０５に示されるものは，
多孔板２５としてアルミニウムパネルが用いられたもの
である。2. Description of the Related Art A sound absorbing panel is provided on a side wall of a route to reduce running noise of a car or a railway, or a sound absorbing panel is attached to an inner wall of a tunnel to reduce running noise and noise of a ventilation blower to prevent noise. Is being pursued. In addition to the sound absorbing effect, it is also important that the sound absorbing panel for noise reduction be able to withstand the pollution and weather deterioration caused by being installed outdoors. In addition, the frequency of noise sources such as automobiles, railways, and blowers contains a wide range of components from low frequencies to high frequencies, so it effectively acts on all sound ranges, and dust, vibration, wind, rain, solar radiation, etc. Must be able to withstand the harsh installation conditions of. As a sound absorbing panel that meets the above requirements, for example,
There is a sound deadening panel disclosed in JP-A-59-8081 or a sound absorbing perforated aluminum panel disclosed in JIS-A-6305. The previous example is shown in Figure 8.
As shown in FIG. 4, a large number of small holes 21 are provided on the entire surface of a hard porous sound absorbing material 20 made by sintering metal or ceramic, and the sound absorbing performance is improved by communicating with the air layer behind. Then, it is attached to the sound source side of the strength member 23, which is a wall surface, via an air layer. In the latter example, as shown in FIG. 9, a porous plate 25 having a large number of small holes penetrating the front surface of a porous sound absorbing material 24 such as glass wool, urethane or rock wool is a wall surface. It is attached to the sound source side of the strength member 23. The perforated plate 25 is for preventing scattering of the sound absorbing material, and is made of a material such as metal, wood or cement. What is shown in JIS-A-6305 is
An aluminum panel is used as the porous plate 25.
【０００３】[0003]
【発明が解決しようとする課題】上記従来例に示した焼
結金属等による硬質多孔質吸音材２０は，耐久性に優れ
ているが，低周波領域の吸音性能に劣る欠点を有してい
るため，従来例においては，該硬質多孔質吸音材２０に
小孔２１を設けて，背後に設けた空気層と音源空間とを
連通させることにより低周波領域の吸音性能の改善を図
っている．しかし，小孔２１を設けたことによる高周波
領域の吸音性能の劣化をきたす問題点を有している。一
方，グラスウール，ウレタン等による吸音材は，広範囲
の周波数領域で高い吸音性能を有するが，耐久性に欠け
る欠点がある。そのため，多孔板２５を用いて吸音材の
保護を図っているものの，屋外で使用した場合には，汚
染，劣化等による性能低下のため数年で取り替えている
実情にある。本発明は，上記従来の問題点に鑑み，広範
囲の周波数領域での吸音性能を高め，且つ経時変化，耐
候性に優れた吸音パネルを提供することを目的とする。The hard porous sound absorbing material 20 made of sintered metal or the like shown in the above-mentioned conventional example is excellent in durability, but has a drawback that it is inferior in sound absorbing performance in a low frequency region. Therefore, in the conventional example, a small hole 21 is provided in the hard porous sound absorbing material 20, and the air layer provided behind and the sound source space are communicated with each other to improve the sound absorbing performance in the low frequency region. However, there is a problem that the provision of the small holes 21 deteriorates the sound absorbing performance in the high frequency region. On the other hand, sound absorbing materials such as glass wool and urethane have high sound absorbing performance in a wide frequency range, but have the drawback of lacking durability. Therefore, although the sound absorbing material is protected by using the perforated plate 25, when it is used outdoors, it is replaced in a few years due to performance deterioration due to contamination, deterioration, etc. In view of the above conventional problems, it is an object of the present invention to provide a sound absorbing panel that enhances sound absorbing performance in a wide frequency range and is excellent in aging and weather resistance.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
に本発明が採用する手段は，音源に面した壁面に空気層
を介して付設する硬質多孔質材料からなる吸音パネルに
おいて，音源側から第１層に硬質多孔質材料，第２層に
空気層，第３層に硬質多孔質材料，第４層に空気層，第
５層に前記壁面である強度部材の順に配すると共に，前
記第１層の硬質多孔質材料の全面に前記第２層の空気層
に連通する多数の小孔を設けたことを特徴とする多層吸
音パネルとして構成される。上記における第１層硬質多
孔質材料に設ける小孔の開口総面積は，望ましくは第１
層硬質多孔質材料の表面積に対して２〜１０％とし，ま
た，上記における第２層と第４層との空気層の厚みは，
概略１：１の比率として構成されると好適である。[Means for Solving the Problems] The means adopted by the present invention for achieving the above-mentioned object is a sound absorbing panel made of a hard porous material attached to a wall surface facing a sound source through an air layer, from the sound source side. The first layer is a hard porous material, the second layer is an air layer, the third layer is a hard porous material, the fourth layer is an air layer, and the fifth layer is a strength member that is the wall surface. A multilayer sound absorbing panel is characterized in that a large number of small holes communicating with the air layer of the second layer are provided on the entire surface of one layer of the hard porous material. The total opening area of the small holes provided in the first layer hard porous material is preferably the first
2 to 10% of the surface area of the layer hard porous material, and the thickness of the air layer of the second layer and the fourth layer in the above is
It is preferable that the ratio is approximately 1: 1.
【０００５】[0005]
【作用】本発明によれば，第１層に配した硬質多孔質材
料の全面に小孔を開口して，第２層の空気層と音源空間
とを連通することにより，低周波領域に共振点を得る共
振消音効果を得て，第１層硬質多孔質材料の吸音効果と
併せて低周波領域の吸音性能を高めると共に，第１・２
層で吸音されずに透過した高周波領域の音波を，第３層
の硬質多孔質材料と第４層の空気層とにより吸音する。
従って，第１・２層で低周波領域の音波を吸音し，第３
・４層で高周波領域の音波を吸音する組合せにより，低
周波領域から高周波領域にわたる優れた吸音性能が得ら
れる。第１層の硬質多孔質材料に開口する小孔の大きさ
と数による開口率を，硬質多孔質材料の厚さと第２層の
空気層の厚さとに係る所定の開口率にすることによっ
て，小孔と空気層との連通による低周波領域の共振点が
得られ，共振による消音効果により低周波領域の吸音性
能が高くなる。また，第２層と第４層との空気層の厚み
の比率を概略１：１とすることにより，低周波領域から
高周波領域にわたり，ほぼ平均した吸音性能が得られ
る。According to the present invention, small holes are opened in the entire surface of the hard porous material arranged in the first layer so that the air layer of the second layer and the sound source space are communicated with each other, so that resonance occurs in the low frequency region. The sound absorbing effect of the first layer hard porous material is obtained along with the sound absorbing effect of the first layer hard porous material to enhance the sound absorbing performance in the low frequency region.
Sound waves in a high frequency range that are transmitted without being absorbed by the layers are absorbed by the hard porous material of the third layer and the air layer of the fourth layer.
Therefore, sound waves in the low frequency region are absorbed by the first and second layers, and the third layer
・ By combining four layers to absorb sound waves in the high frequency range, excellent sound absorption performance from the low frequency range to the high frequency range can be obtained. By setting the opening ratio depending on the size and number of the small holes opened in the hard porous material of the first layer to a predetermined opening ratio related to the thickness of the hard porous material and the thickness of the air layer of the second layer, The resonance point in the low frequency region is obtained by the communication between the hole and the air layer, and the sound absorbing performance in the low frequency region is enhanced due to the sound deadening effect by the resonance. Further, by setting the thickness ratio of the air layers of the second layer and the fourth layer to about 1: 1, almost average sound absorbing performance can be obtained from the low frequency region to the high frequency region.
【０００６】[0006]
【実施例】以下，添付図面を参照して，本発明を具体化
した実施例につき説明する。尚，以下の実施例は本発明
を具体化した一例であって，本発明の技術的範囲を限定
するものではない。ここに，図１は実施例多層吸音パネ
ルの構造を示す部分断面図，図２は第１層硬質多孔質材
料の部分平面図，図３は図１に示す構造における吸音性
能を測定した吸音率特性グラフ，図４は第１層硬質多孔
質材料に設けた小孔の開口率による吸音性能の変化を示
す吸音率特性グラフ，図５は第１層硬質多孔質材料に設
ける小孔の実施態様を示す斜視図，図６は第２層，第４
層の空気層の厚さ変化を示す側面図，図７は空気層の厚
さを変えたときの吸音性能の変化を示す吸音率特性グラ
フである。本実施例による多層吸音パネルは，図１に示
すように，音源に面した壁面である強度部材５に付設さ
れるもので，同図に示すように，音源方向の第１層から
前記強度部材５を第５層とする多層構造に構成される。
第１層は多数の小孔を設けた硬質多孔性材料１，第２層
は空気層２，第３層は硬質多孔性材料３，第４層は空気
層４，第５層は強度部材５である。尚，矢印は音の進む
方向を示している。硬質多孔質材料１及び３は，硬質部
材の中に空気が通過し得る細孔を有するもので，具体的
には，発泡アルミニウム，多孔質鋳物，焼結金属などの
多孔質金属材料や，多孔質セラミック材料，多孔質樹脂
材料などを用いることができる。第１層及び第３層とし
て，これらの材料のうち同一材料を用いてもよいが，設
置環境に応じて適宜異なる材料を選択することができ
る。Embodiments of the present invention will be described below with reference to the accompanying drawings. The following embodiments are examples of embodying the present invention and do not limit the technical scope of the present invention. 1 is a partial cross-sectional view showing the structure of the multilayer sound absorbing panel of the embodiment, FIG. 2 is a partial plan view of the first layer hard porous material, and FIG. 3 is a sound absorption coefficient obtained by measuring the sound absorbing performance in the structure shown in FIG. Characteristic graph, FIG. 4 is a sound absorption coefficient characteristic graph showing a change in sound absorption performance depending on the opening ratio of small holes provided in the first layer hard porous material, and FIG. 5 is an embodiment of small holes provided in the first layer hard porous material. FIG. 6 is a perspective view showing the second layer and the fourth layer.
FIG. 7 is a side view showing a change in thickness of the air layer, and FIG. 7 is a sound absorption coefficient characteristic graph showing a change in sound absorbing performance when the thickness of the air layer is changed. As shown in FIG. 1, the multilayer sound absorbing panel according to the present embodiment is attached to a strength member 5 that is a wall surface facing a sound source. As shown in FIG. 5 is the fifth layer.
The first layer is a hard porous material having a large number of small holes 1, the second layer is an air layer 2, the third layer is a hard porous material 3, the fourth layer is an air layer 4, and the fifth layer is a strength member 5. Is. The arrow indicates the direction in which the sound travels. The hard porous materials 1 and 3 have pores through which air can pass in a hard member. Specifically, the porous materials such as foamed aluminum, porous casting, and sintered metal, and porous metal A high quality ceramic material or a porous resin material can be used. Although the same material may be used as the first layer and the third layer, different materials can be appropriately selected according to the installation environment.
【０００７】また，第１層から第５層の，それぞれの厚
さは，用いる材料，組合せ等に応じて適宜選択される。
図１に示す実施例においては，第１層と第３層の硬質多
孔質材料１及び３として発泡アルミニウムを用いて，そ
の厚さをそれぞれ５mm，５mmとし，第２層と第４層の空
気層２及び４の厚さを，それぞれ２０mm，２０mmとし，
第５層の強度部材５を厚さ５０mmのコンクリートとした
場合を示している。第１層の硬質多孔質材料１には，図
２に示すように，直径５mmΦの小孔６を全面に多数配し
て音源空間と第２層とを連通している。図１に示した構
成による吸音性能は，図３に示す吸音率特性グラフの曲
線Ａとして示される。同図における曲線Ｂ及び曲線Ｃ
は，比較対称するために従来例吸音パネルの吸音性能を
測定したもので，曲線Ｂは図８に示した従来例構成によ
るもの，曲線Ｃは図９に示した従来例構成によるもので
ある。曲線Ｂに示される従来構成における硬質多孔質吸
音材２０は，厚さ５mmの発泡アルミニウム，その背後の
空気層の厚さは４５mmである。また，曲線Ｃに示される
従来構成における多孔質吸音材２４は，厚さ５０mmのグ
ラスウール，多孔板２５の厚みは１mmである。The thicknesses of the first layer to the fifth layer are appropriately selected according to the materials used and the combination.
In the embodiment shown in FIG. 1, aluminum foam is used as the hard porous materials 1 and 3 for the first and third layers, and their thicknesses are 5 mm and 5 mm, respectively, and the air of the second and fourth layers is The thickness of layers 2 and 4 is 20mm and 20mm respectively,
The case where the strength member 5 of the fifth layer is concrete with a thickness of 50 mm is shown. As shown in FIG. 2, a large number of small holes 6 having a diameter of 5 mmΦ are arranged on the entire surface of the hard porous material 1 of the first layer to communicate the sound source space with the second layer. The sound absorption performance of the configuration shown in FIG. 1 is shown as a curve A in the sound absorption coefficient characteristic graph shown in FIG. Curve B and curve C in FIG.
In the figure, the sound absorption performance of the conventional sound absorbing panel is measured for comparison symmetry, the curve B is based on the conventional example configuration shown in FIG. 8, and the curve C is based on the conventional example configuration shown in FIG. The hard porous sound-absorbing material 20 in the conventional configuration shown by the curve B is aluminum foam having a thickness of 5 mm, and the thickness of the air layer behind it is 45 mm. Further, the porous sound absorbing material 24 in the conventional configuration shown by the curve C is glass wool having a thickness of 50 mm, and the thickness of the porous plate 25 is 1 mm.
【０００８】図３に曲線Ａ，Ｂ，Ｃとして示される各吸
音構造の吸音層の厚みは，最終層の強度部材５または２
３を除いて，その総厚が同じ５０mmであるが吸音性能に
は，大きな差を生じていることがわかる。同図から理解
されるように，本実施例による多層吸音構造（曲線Ａ）
によれば，５００Hz〜２ｋHzで高い吸音率（０．８以
上）が得られているのに対して，従来例（曲線Ｂ）の１
枚の硬質多孔質吸音材２０と空気層だけで構成した吸音
構造では，１ｋHz以上の周波数領域で吸音率が急激に低
下している。また，従来例（曲線Ｃ）の多孔質吸音材２
４と多孔板２５とで構成した吸音構造では，１ｋHz以上
の高周波領域で高い吸音率が得られるものの，１ｋHz以
下の低い周波数領域の吸音率が劣ることがわかる。図４
に示す吸音率特性グラフは，第１層硬質多孔質材料１に
設ける小孔６の開口率を変化させたときの吸音性能を示
すもので，硬質多孔質材料１の表面積に対する小孔６の
開口総面積を０から５％にまで変化させている。小孔６
を設けることにより，中高周波領域における吸音率の改
善がなされていることが理解される。尚，第１層の硬質
多孔質材料１に開口する小孔６の形状は，図２で示した
丸孔でなく，例えば，図５に示すように，スリット状に
形成したものでも同様の効果を有する。The thickness of the sound absorbing layer of each sound absorbing structure shown as curves A, B and C in FIG. 3 is the strength member 5 or 2 of the final layer.
It can be seen that there is a large difference in sound absorption performance even though the total thickness is 50 mm except for 3. As understood from the figure, the multilayer sound absorbing structure (curve A) according to the present embodiment.
According to the sample, a high sound absorption coefficient (0.8 or more) is obtained at 500 Hz to 2 kHz, while the conventional example (curve B) has
In the sound absorbing structure composed of only one piece of the hard porous sound absorbing material 20 and the air layer, the sound absorbing coefficient sharply decreases in the frequency region of 1 kHz or higher. In addition, the porous sound absorbing material 2 of the conventional example (curve C)
In the sound absorbing structure composed of 4 and the perforated plate 25, although a high sound absorbing coefficient is obtained in a high frequency region of 1 kHz or more, it is understood that the sound absorbing coefficient in a low frequency region of 1 kHz or less is inferior. Figure 4
The sound absorption characteristic graph shown in shows the sound absorption performance when the opening ratio of the small holes 6 provided in the first layer hard porous material 1 is changed, and the opening of the small holes 6 with respect to the surface area of the hard porous material 1 is shown. The total area is changed from 0 to 5%. Small hole 6
It is understood that the sound absorption coefficient in the middle and high frequency regions is improved by providing the. The shape of the small holes 6 opened in the hard porous material 1 of the first layer is not the round hole shown in FIG. 2, but, for example, a slit-like shape as shown in FIG. Have.
【０００９】図７は第２層と第４層の空気層の厚み比を
変化させたときの吸音性能を示す吸音率特性グラフで，
図６に示すように，第１及び第３層の硬質多孔質材料
１，３を厚さ５mmの発泡アルミニウムとし，第２及び第
４層の空気層の厚さの和を４０mmとして，第１層から第
４層までの総和を５０mm以内に抑えた中での空気層の厚
さの変化である。第２層の空気層２の厚みをＸmmとし，
第４層の空気層４の厚みを４０−Ｘmmとして，Ｘ＝７，
１２，１７，２０，２２，２７mmと変化させたときの吸
音率特性を示している。吸音率特性グラフに示されるよ
うに，１７mm≦Ｘ≦２３mmの範囲，即ち，第２層と第４
層との空気層２，４の厚み比が概略１：１のとき，５０
０Hz以上の周波数領域で高い吸音率がえられることがわ
かる。FIG. 7 is a sound absorption coefficient characteristic graph showing sound absorption performance when the thickness ratio of the air layers of the second layer and the fourth layer is changed.
As shown in FIG. 6, the hard porous materials 1 and 3 of the first and third layers are made of foamed aluminum having a thickness of 5 mm, and the total thickness of the air layers of the second and fourth layers is set to 40 mm. This is the change in the thickness of the air layer while suppressing the total sum of the layers to the fourth layer within 50 mm. The thickness of the second air layer 2 is X mm,
When the thickness of the fourth air layer 4 is 40-X mm, X = 7,
The sound absorption coefficient characteristics when changed to 12, 17, 20, 22, 27 mm are shown. As shown in the sound absorption coefficient graph, the range of 17 mm ≦ X ≦ 23 mm, that is, the second layer and the fourth layer
When the thickness ratio of the air layers 2 and 4 to the layers is approximately 1: 1, 50
It can be seen that a high sound absorption coefficient is obtained in the frequency range of 0 Hz or higher.
【００１０】[0010]
【発明の効果】以上の説明の通り本発明によれば，硬質
多孔質材料と空気層とによる高周波領域の吸音効果と，
全面に小孔を開口した硬質多孔質材料と空気層とにより
低周波領域に共振点を得る消音効果とを組み合わせるこ
とにより，低周波領域から高周波領域にわたる優れた吸
音性能が得られる。また，硬質吸音材料により構成され
ているので，経時変化，耐久性に優れた吸音パネルを提
供することができる。従って，交通騒音対策用の防音壁
や屋外で使用される機械類の騒音防止壁などとして絶大
なる効果を奏する。As described above, according to the present invention, the sound absorbing effect in the high frequency region by the hard porous material and the air layer,
By combining the hard porous material with small holes all over the surface and the sound deadening effect to obtain the resonance point in the low frequency region by the air layer, excellent sound absorbing performance from the low frequency region to the high frequency region can be obtained. Further, since it is made of a hard sound absorbing material, it is possible to provide a sound absorbing panel which is excellent in aging and durability. Therefore, it has a great effect as a noise barrier for traffic noise and a noise barrier for machinery used outdoors.
【図１】本発明に係る実施例多層吸音パネルの構成を示
す部分断面図。FIG. 1 is a partial cross-sectional view showing a configuration of an example multilayer sound absorbing panel according to the present invention.
【図２】第１層硬質多孔質材料の部分平面図。FIG. 2 is a partial plan view of a first layer hard porous material.
【図３】上記実施例及び従来例の吸音性能を示す吸音率
特性グラフ。FIG. 3 is a sound absorption coefficient characteristic graph showing the sound absorption performance of the above-mentioned example and the conventional example.
【図４】小孔の開口率を変化させたときの吸音率特性グ
ラフ。FIG. 4 is a sound absorption coefficient characteristic graph when the aperture ratio of small holes is changed.
【図５】小孔の開口の実施態様を示す斜視図。FIG. 5 is a perspective view showing an embodiment of opening of small holes.
【図６】空気層の厚さ変化を説明する部分断面図。FIG. 6 is a partial cross-sectional view illustrating a change in thickness of an air layer.
【図７】空気層の厚さを変化させたときの吸音率特性グ
ラフ。FIG. 7 is a sound absorption coefficient characteristic graph when the thickness of the air layer is changed.
【図８】従来例硬質多孔質吸音材による吸音パネルの構
成を示す斜視図。FIG. 8 is a perspective view showing a configuration of a sound absorbing panel made of a conventional hard porous sound absorbing material.
【図９】従来例多孔性吸音材による吸音パネルの構成を
示す斜視図。FIG. 9 is a perspective view showing a configuration of a sound absorbing panel made of a conventional porous sound absorbing material.
１，３…硬質多孔質材料 ２，４…空気層 ５…強度部材 ６…小孔 1, 3 ... Hard porous material 2, 4 ... Air layer 5 ... Strength member 6 ... Small hole
Claims (3)
る硬質多孔質材料からなる吸音パネルにおいて， 音源側から第１層に硬質多孔質材料，第２層に空気層，
第３層に硬質多孔質材料，第４層に空気層，第５層に前
記壁面である強度部材の順に配すると共に，前記第１層
の硬質多孔質材料の全面に前記第２層の空気層に連通す
る多数の小孔を設けたことを特徴とする多層吸音パネ
ル。1. A sound absorbing panel made of a hard porous material attached to a wall surface facing a sound source via an air layer, wherein the sound source side has a hard porous material as the first layer, an air layer as the second layer,
The hard porous material is arranged in the third layer, the air layer is arranged in the fourth layer, and the strength member which is the wall surface is arranged in order in the fifth layer, and the air of the second layer is formed on the entire surface of the hard porous material of the first layer. A multi-layer sound absorbing panel characterized by having a large number of small holes communicating with the layers.
口総面積の，前記硬質多孔質材料の表面積に対する比率
が２〜１０％である請求項１記載の多層吸音パネル。2. The multilayer sound absorbing panel according to claim 1, wherein the ratio of the total opening area of the small holes provided in the hard porous material of the first layer to the surface area of the hard porous material is 2 to 10%.
１：１の比率である請求項１記載の多層吸音パネル。3. The multilayer sound absorbing panel according to claim 1, wherein the air layers of the second layer and the fourth layer have a thickness ratio of approximately 1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3231374A JPH0571109A (en) | 1991-09-11 | 1991-09-11 | Multilayer sound absorbing panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3231374A JPH0571109A (en) | 1991-09-11 | 1991-09-11 | Multilayer sound absorbing panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0571109A true JPH0571109A (en) | 1993-03-23 |
Family
ID=16922622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3231374A Pending JPH0571109A (en) | 1991-09-11 | 1991-09-11 | Multilayer sound absorbing panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0571109A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2724675A1 (en) * | 1994-09-19 | 1996-03-22 | Tolartois | Acoustic insulation panel to prevent noise pollution from traffic |
| JP2003285647A (en) * | 2002-03-28 | 2003-10-07 | Honda Motor Co Ltd | Fuel battery automobile |
| JP2004330534A (en) * | 2003-05-02 | 2004-11-25 | Kanegafuchi Chem Ind Co Ltd | Molded acoustic material obtained by recycled tile carpet |
| JP2007262669A (en) * | 2006-03-27 | 2007-10-11 | Ps Mitsubishi Construction Co Ltd | Sound absorbing board structure and sound insulation wall using the sound absorbing board structure |
| JP2008285857A (en) * | 2007-05-16 | 2008-11-27 | Nippon Light Metal Co Ltd | Porous sound-absorbing material and sound-absorbing structure using the same |
| JP2009009016A (en) * | 2007-06-29 | 2009-01-15 | Canon Inc | Image forming apparatus |
| CN102968985A (en) * | 2012-11-07 | 2013-03-13 | 江苏大学 | Thin broadband sound-absorbing structure of composite multi-layer mechanical impedance plates |
| JP2017166187A (en) * | 2016-03-15 | 2017-09-21 | 東海旅客鉄道株式会社 | Shaft structure |
-
1991
- 1991-09-11 JP JP3231374A patent/JPH0571109A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2724675A1 (en) * | 1994-09-19 | 1996-03-22 | Tolartois | Acoustic insulation panel to prevent noise pollution from traffic |
| JP2003285647A (en) * | 2002-03-28 | 2003-10-07 | Honda Motor Co Ltd | Fuel battery automobile |
| JP2004330534A (en) * | 2003-05-02 | 2004-11-25 | Kanegafuchi Chem Ind Co Ltd | Molded acoustic material obtained by recycled tile carpet |
| JP2007262669A (en) * | 2006-03-27 | 2007-10-11 | Ps Mitsubishi Construction Co Ltd | Sound absorbing board structure and sound insulation wall using the sound absorbing board structure |
| JP2008285857A (en) * | 2007-05-16 | 2008-11-27 | Nippon Light Metal Co Ltd | Porous sound-absorbing material and sound-absorbing structure using the same |
| JP2009009016A (en) * | 2007-06-29 | 2009-01-15 | Canon Inc | Image forming apparatus |
| CN102968985A (en) * | 2012-11-07 | 2013-03-13 | 江苏大学 | Thin broadband sound-absorbing structure of composite multi-layer mechanical impedance plates |
| JP2017166187A (en) * | 2016-03-15 | 2017-09-21 | 東海旅客鉄道株式会社 | Shaft structure |
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