JPH08338082A - Sound-absorptive body and unit - Google Patents
Sound-absorptive body and unitInfo
- Publication number
- JPH08338082A JPH08338082A JP7171465A JP17146595A JPH08338082A JP H08338082 A JPH08338082 A JP H08338082A JP 7171465 A JP7171465 A JP 7171465A JP 17146595 A JP17146595 A JP 17146595A JP H08338082 A JPH08338082 A JP H08338082A
- Authority
- JP
- Japan
- Prior art keywords
- sound absorbing
- sound
- air chamber
- ribs
- absorbing body
- 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.)
- Granted
Links
Landscapes
- Building Environments (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、室内の天井及び壁面用
途の音響設計、屋外の騒音防止としての防音壁及びトン
ネル内装等の用途において、吸音構造の表面に配置する
のに適した吸音体及びその吸音体を用いた吸音ユニット
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorber suitable for being placed on the surface of a sound absorbing structure in applications such as acoustic design for indoor ceilings and wall surfaces, soundproof walls for outdoor noise prevention, and tunnel interiors. And a sound absorbing unit using the sound absorbing body.
【0002】[0002]
【従来の技術】従来、天井や壁面等に設ける吸音板とし
て、岩綿やガラスウール等の繊維マット板が使用されて
いる。しかしながら、これらの繊維マット板では中高音
域の吸音効果は有るものの、低周波数域での吸音特性に
劣るという欠点がある。そこで、低周波数域での吸音特
性に優れた吸音構造として、空気室の前に、平板に多数
の貫通孔を設けて有孔構造とした吸音板を配置したもの
が知られている。2. Description of the Related Art Conventionally, a fiber mat plate made of rock wool, glass wool or the like has been used as a sound absorbing plate provided on a ceiling or a wall surface. However, although these fiber mat plates have a sound absorbing effect in the mid-high range, they have a drawback that they have poor sound absorbing characteristics in the low frequency range. Therefore, as a sound absorbing structure having excellent sound absorbing characteristics in a low frequency range, there is known a sound absorbing plate having a perforated structure in which a plurality of through holes are provided in a flat plate in front of the air chamber.
【0003】[0003]
【発明が解決しようとする課題】ところが、従来の有孔
構造の吸音板は、平面に多数の孔を開口させた形状であ
るので、これを天井や壁面の表面に配置すると、平面に
開口した多数の孔が見えてしまい、壁表面に視点が合わ
なくなり、ちらちらして不快感を与えるという問題があ
った。また、平面に多数の孔を開口しただけの単純な形
状であるため、意匠的な限界があった。更に、多数の孔
が汚れて外観を悪くするとか、吸音特性を劣化させると
いう問題もあった。However, since the conventional sound absorbing plate having a perforated structure has a shape in which a large number of holes are opened in a plane, when it is arranged on the surface of a ceiling or a wall surface, it is opened in a plane. There was a problem that a large number of holes could be seen, and the viewpoint could not be fitted to the wall surface, causing flickering and discomfort. Further, since it has a simple shape in which a large number of holes are opened in a plane, there is a limit in design. Further, there is a problem that a large number of holes are contaminated and the appearance is deteriorated, or sound absorption characteristics are deteriorated.
【0004】本発明はかかる従来の問題点に鑑みてなさ
れたもので、空気室の前に配置して良好な吸音特性を備
えた吸音構造を形成するために使用でき、しかも良好な
外観を与えることの可能な有孔構造の吸音体を提供する
ことを目的とする。The present invention has been made in view of the above problems, and can be used in front of an air chamber to form a sound absorbing structure having a good sound absorbing characteristic, and gives a good appearance. It is an object of the present invention to provide a sound absorbing body having a perforated structure that can be used.
【0005】また、本発明は、その吸音体を用いた吸音
ユニットを提供することも目的とする。Another object of the present invention is to provide a sound absorbing unit using the sound absorbing body.
【0006】[0006]
【課題を解決するための手段】本願請求項1の発明は、
上記問題点を解決するため、空気室の前に配置され、該
空気室と共に吸音構造を構成する吸音体の構造を、前記
空気室とは反対側に突出するように且つ前記空気室に連
通する共鳴空間を形成するように設けられた複数のリブ
と、該リブの間に形成された基底部とを有するものと
し、前記リブの側面及び基底部の少なくとも一方に前記
空気室に連通する複数の貫通孔を形成したことを特徴と
するものである。The invention according to claim 1 of the present application is as follows.
In order to solve the above-mentioned problems, a structure of a sound absorbing body, which is arranged in front of an air chamber and constitutes a sound absorbing structure together with the air chamber, communicates with the air chamber so as to project to the side opposite to the air chamber. A plurality of ribs provided so as to form a resonance space and a base portion formed between the ribs are provided, and a plurality of ribs communicating with the air chamber are provided on at least one of a side surface and a base portion of the rib. It is characterized in that a through hole is formed.
【0007】請求項2の発明は、上記の吸音体に、更
に、前記リブの間の基底部の内面若しくは外面の少なく
とも一方に吸音材を配置するという構成としたものであ
る。According to a second aspect of the present invention, in the above sound absorbing body, a sound absorbing material is further arranged on at least one of the inner surface and the outer surface of the base portion between the ribs.
【0008】また、請求項3の発明は、上記の吸音体の
前記リブ及び基底部の少なくとも一方の裏面に、背後の
空気室を分割する仕切壁を設けるという構成を備えたも
のである。Further, the invention of claim 3 has a construction in which a partition wall for dividing an air chamber behind is provided on the back surface of at least one of the rib and the base of the sound absorbing body.
【0009】更に、本願請求項4の発明は、上記の吸音
体に設けるリブが、先端に向かって拡がった断面形状の
部分を有していることを特徴とするものである。Further, the invention according to claim 4 of the present invention is characterized in that the rib provided on the sound absorbing body has a portion having a cross-sectional shape that widens toward the tip.
【0010】請求項5の発明は、上記の吸音体に設ける
複数のリブの大きさを2種類以上とし、各リブが形成す
る共鳴空間の容積が少なくとも2種類存在する構成とし
たものである。According to a fifth aspect of the present invention, the size of the plurality of ribs provided on the sound absorbing body is two or more, and the volume of the resonance space formed by each rib is at least two.
【0011】請求項6の発明は、上記した吸音体と、そ
の背後に空気室を形成するように間隔を開けて背板を配
置し、その吸音体と背板とを一体構造としてユニット化
したものである。According to a sixth aspect of the present invention, the sound absorber and the back plate are arranged with a space therebetween so as to form an air chamber behind the sound absorber, and the sound absorber and the back plate are integrated into a unit. It is a thing.
【0012】[0012]
【作用】本願請求項1の発明の吸音体は、これを空気室
の前面に取り付けて吸音構造を形成した時、複数のリブ
が前面となるため、多数のリブが並んだ外観となり、貫
通孔はそのリブの側面やリブ間の基底部に形成されてい
るためあまり目立つことがなく、従って、その貫通孔に
よるちらつきがなく、不快感を与えることがない。ま
た、吸音体は多数の貫通孔を備えた有孔構造であるの
で、空気室との組み合わせにより低周波数域での吸音特
性の良い吸音構造を形成でき、しかもその際リブ内の空
間が共鳴空間として作用するので吸音特性が良く、従来
の多孔板を用いる場合に比べて、吸音構造を薄くするこ
とが可能である。更に、リブの間隔や幅を適宜変えるこ
とにより、種々な外観を与えることができ、種々な意匠
に変更できる。また、複数のリブは補強の作用も果たし
ており、吸音体の強度を向上できる。According to the sound absorbing body of the invention of claim 1, when the sound absorbing body is attached to the front surface of the air chamber to form the sound absorbing structure, a plurality of ribs are on the front surface, so that the ribs have an appearance in which a large number of ribs are arranged side by side. Since it is formed on the side surface of the rib or on the base portion between the ribs, it is not very noticeable, and therefore, there is no flicker due to the through hole and no discomfort is given. In addition, since the sound absorber has a perforated structure with many through holes, it can form a sound absorbing structure with good sound absorbing characteristics in the low frequency range by combining with the air chamber, and at that time, the space inside the rib is a resonance space. The sound absorbing structure has a good sound absorbing property, and the sound absorbing structure can be made thinner than in the case of using a conventional porous plate. Further, various appearances can be given and various designs can be obtained by appropriately changing the intervals and widths of the ribs. In addition, the plurality of ribs also serve as a reinforcement, and the strength of the sound absorbing body can be improved.
【0013】請求項2の発明では、上記の吸音体に、更
に、前記リブの間の基底部の内面若しくは外面の少なく
とも一方に吸音材を配したことにより、共鳴周波数域を
拡げることができ、広い周波数範囲における吸音特性を
向上できる。According to the second aspect of the present invention, the sound absorbing body is further provided with a sound absorbing material on at least one of the inner surface and the outer surface of the base portion between the ribs, whereby the resonance frequency range can be expanded. Sound absorption characteristics in a wide frequency range can be improved.
【0014】また、請求項3の発明は、上記の吸音体の
前記リブ及び基底部の少なくとも一方の裏面に、そのリ
ブ内の空間及び背後の空気室を分割する仕切壁を設けた
ことにより、複数の独立した小室を形成し、その独立し
た小室に対応した共鳴周波数を実現でき、換言すれば、
独立した小室の容積を所望の共鳴周波数に対応した値に
設計することで、容易に所望の吸音特性の吸音構造を設
計できる。According to a third aspect of the present invention, a partition wall is provided on the back surface of at least one of the rib and the base of the sound absorbing body to divide a space inside the rib and an air chamber behind the rib. A plurality of independent small chambers can be formed, and a resonance frequency corresponding to the independent small chambers can be realized. In other words,
By designing the volume of the independent small chamber to a value corresponding to the desired resonance frequency, it is possible to easily design a sound absorbing structure having desired sound absorbing characteristics.
【0015】更に、本願請求項4の発明は、上記の吸音
体に設けるリブが、先端に向かって拡がった断面形状の
部分を有しているので、そのリブが、基底部或いはリブ
側面に形成した貫通孔を隠す効果が大きく、外観が良く
なると共にその貫通孔へのごみやほこりの付着を防止す
る効果もあり、長期間に渡って、貫通孔の詰まりを防止
できる。Further, in the invention of claim 4 of the present application, since the rib provided on the sound absorbing body has a portion having a cross-sectional shape that widens toward the tip, the rib is formed on the base portion or the rib side surface. The effect of hiding the through hole is large, the appearance is improved, and the effect of preventing dust and dirt from adhering to the through hole can be prevented, and clogging of the through hole can be prevented for a long period of time.
【0016】請求項5の発明は、上記の吸音体に設ける
複数のリブの大きさを2種類以上とし、各リブが形成す
る共鳴空間の容積が少なくとも2種類存在する構成とし
たことにより、共鳴周波数を複数とすることができ、広
い周波数範囲での吸音特性を向上できる。According to a fifth aspect of the present invention, the size of the plurality of ribs provided on the sound absorbing body is two or more, and the volume of the resonance space formed by each rib is at least two. It is possible to set a plurality of frequencies, and it is possible to improve sound absorption characteristics in a wide frequency range.
【0017】請求項6の発明は、上記した吸音体と、そ
の背後に空気室を形成するように間隔を開けて背板を配
置し、その吸音体と背板とを一体構造としてユニット化
したことにより、単にこの吸音ユニットを並べるのみ
で、所定の吸音特性の壁面を形成でき、施工現場での吸
音構造の製造を容易とできる。According to a sixth aspect of the present invention, the sound absorber described above and the back plate are arranged so as to form an air chamber behind the sound absorber, and the sound absorber and the back plate are integrated into a unit. Thus, by simply arranging the sound absorbing units, a wall surface having a predetermined sound absorbing characteristic can be formed, and the sound absorbing structure can be easily manufactured on the construction site.
【0018】[0018]
【実施例】以下、本発明の好適な実施例を説明する。図
1は本発明の一実施例による吸音体を用いて構成した吸
音構造の概略斜視図、図2はその吸音構造の概略断面図
であり、1は壁面、2は空気室、3はその空気室2の前
に位置するよう、壁面1に対してスペーサ4を介して取
り付けられた吸音体であり、壁面1、空気室2と共に吸
音構造を構成する。この吸音体3は、金属、プラスチッ
ク、木材等の板材によって作られており、空気室2とは
反対側に突出するように且つその空気室2に連通する共
鳴空間5を形成するように設けられた複数のリブ6と、
そのリブ6の間に形成された基底部7とを有し、その基
底部7に空気室2に連通する複数の貫通孔8が形成され
ている。The preferred embodiments of the present invention will be described below. FIG. 1 is a schematic perspective view of a sound absorbing structure constructed by using a sound absorbing body according to an embodiment of the present invention, FIG. 2 is a schematic sectional view of the sound absorbing structure, 1 is a wall surface, 2 is an air chamber, 3 is the air thereof. The sound absorbing body is attached to the wall surface 1 via the spacer 4 so as to be positioned in front of the chamber 2, and constitutes a sound absorbing structure together with the wall surface 1 and the air chamber 2. The sound absorber 3 is made of a plate material such as metal, plastic, or wood, and is provided so as to project to the side opposite to the air chamber 2 and form a resonance space 5 communicating with the air chamber 2. Multiple ribs 6,
The base portion 7 is formed between the ribs 6, and a plurality of through holes 8 communicating with the air chamber 2 are formed in the base portion 7.
【0019】この吸音構造では、外部からの音波が表面
の吸音体3にぶつかり、その貫通孔8を通って背後の空
気室2及びリブ6内の共鳴空間5内に入り、その空気室
2及び共鳴空間5による共鳴効果によって吸音される。
この際、後述する実施例〜による吸音実験の結果か
ら分かるように、この吸音構造は、特に低周波数域の吸
音効果が高いという特性を備えている。また、リブ6内
に共鳴空間5を設けたことにより、単に空気室の前に多
孔板を配置した従来の吸音構造に比べて、吸音効果が高
く、吸音構造の厚みを著しく小さくすることができると
いう特性も備えている。In this sound absorbing structure, a sound wave from the outside hits the sound absorbing body 3 on the surface, passes through the through hole 8 and enters the air chamber 2 behind and the resonance space 5 in the rib 6, and the air chamber 2 and Sound is absorbed by the resonance effect of the resonance space 5.
At this time, as can be seen from the results of the sound absorbing experiments according to Examples to be described later, this sound absorbing structure has a characteristic that the sound absorbing effect is particularly high in the low frequency range. Further, by providing the resonance space 5 in the rib 6, the sound absorbing effect is high and the thickness of the sound absorbing structure can be remarkably reduced as compared with the conventional sound absorbing structure in which the porous plate is simply arranged in front of the air chamber. It also has the characteristic.
【0020】ここで、吸音体3に形成する多数の貫通孔
8は、空気室2への音の進入を容易とするために設けた
ものであり、この開口率、孔径、ピッチ等は、空気室2
及び共鳴空間5との組み合わせによる吸音の周波数特性
を考慮して定めればよい。一般的には、開口率としては
0.2〜10%程度が好ましい。また、孔径としては、
3〜15mm程度が好ましい。なお、孔ピッチは上記し
た開口率及び孔径の範囲に一致するように適当に定めれ
ばよい。また、吸音体3に形成するリブ6の幅や高さ
(従って、リブ6内の共鳴空間5の容積)も、空気室2
及び貫通孔8との組み合わせによる吸音の周波数特性を
考慮して定めればよく、例えば、リブ6の最も広い部分
の幅としては40〜100mm程度が、高さは50〜1
00mm程度が好ましい。吸音体3に設けている複数の
リブ6の幅は、一定としてもよいし、異なる幅としても
よい。例えば、2種類の幅のリブ6を交互に配置する構
成としてもよい。このリブ6の幅は吸音周波数に影響す
るので、異なる幅のリブを使用すると、異なる周波数域
で高い吸音効果が得られる。また、リブ6の高さについ
ても同様である。吸音体3の背後に形成する空気室2の
厚さも吸音の周波数特性を考慮して定めるものであり、
例えば、20〜100mm程度が好ましい。Here, the large number of through holes 8 formed in the sound absorbing body 3 are provided to facilitate the entry of sound into the air chamber 2, and the opening ratio, hole diameter, pitch, etc. are Room 2
It may be determined in consideration of the frequency characteristic of sound absorption due to the combination with the resonance space 5. Generally, the aperture ratio is preferably about 0.2 to 10%. Also, as the pore size,
It is preferably about 3 to 15 mm. The hole pitch may be appropriately set so as to match the above-described range of the aperture ratio and the hole diameter. Further, the width and height of the ribs 6 formed on the sound absorbing body 3 (hence, the volume of the resonance space 5 in the ribs 6) are also determined by the air chamber 2
It may be determined in consideration of the frequency characteristics of sound absorption due to the combination with the through holes 8. For example, the width of the widest portion of the rib 6 is about 40 to 100 mm, and the height is 50 to 1 mm.
It is preferably about 00 mm. The width of the plurality of ribs 6 provided on the sound absorbing body 3 may be constant or may be different. For example, the ribs 6 having two kinds of widths may be alternately arranged. Since the width of the rib 6 influences the sound absorption frequency, when a rib having a different width is used, a high sound absorption effect can be obtained in different frequency ranges. The same applies to the height of the rib 6. The thickness of the air chamber 2 formed behind the sound absorber 3 is also determined in consideration of the frequency characteristic of sound absorption,
For example, about 20 to 100 mm is preferable.
【0021】吸音体3は吸音構造の前面に配置されてお
り、従ってリブ6を有する側の表面が見られる状態とな
る。従って、吸音構造の表面は、複数のリブ6が並んだ
状態となっており、リブ6間の溝9の奥に位置する基底
部7に形成されている貫通孔8はほとんど見えず、多数
の貫通孔8を有しているにもかかわらず、その貫通孔8
によるちらつきはなく、リブ6が並んだ縞状の好ましい
外観となる。このため、見る人に不快感を与えることが
なく、好印象を与えることができる。また、複数のリブ
6は補強の作用を果たすので、単に平板状の多孔板に比
べて強度が大きく、このため、壁1に対して空気室2を
形成するよう間隔を開けて吸音体3を取り付けるための
支持部材(スペーサ4等)を簡略化できる。更に、貫通
孔8が溝9の奥に位置しているため、汚れやごみの付着
が防止され、貫通孔8が塞がることを長期間に渡って防
止できる。The sound absorbing body 3 is arranged on the front surface of the sound absorbing structure, so that the surface on the side having the ribs 6 can be seen. Therefore, the surface of the sound absorbing structure is in a state in which a plurality of ribs 6 are arranged side by side, and the through holes 8 formed in the base portion 7 located at the back of the groove 9 between the ribs 6 are hardly visible, and a large number of them are formed. Despite having the through hole 8, the through hole 8
There is no flicker due to the stripes, and the strip 6 has a striped side-by-side preferable appearance. Therefore, it is possible to give a good impression without giving discomfort to the viewer. Further, since the plurality of ribs 6 perform a reinforcing action, the ribs 6 have a larger strength than a flat plate-like perforated plate. Therefore, the sound absorber 3 is spaced apart from the wall 1 so as to form the air chamber 2. The support member (spacer 4 etc.) for attachment can be simplified. Further, since the through hole 8 is located deep in the groove 9, dirt and dust are prevented from adhering, and the through hole 8 can be prevented from being blocked for a long period of time.
【0022】上記実施例では、リブ6間の基底部7の中
央に貫通孔8を形成しているが、この貫通孔8の形成位
置はこの位置に限らず、適宜変更可能である。すなわ
ち、貫通孔8は内部の空気室2或いは共鳴空間5に連通
する位置で、且つ外部から見えにくい位置であればよ
く、例えば、図3(a)に示すように、基底部7の角の
部分に形成するとか、(b)に示すように基底部7に隣
接したリブ6の側面に形成してもよい。In the above embodiment, the through hole 8 is formed at the center of the base portion 7 between the ribs 6, but the formation position of the through hole 8 is not limited to this position and can be appropriately changed. That is, the through hole 8 may be a position that communicates with the air chamber 2 or the resonance space 5 inside and is a position that is difficult to see from the outside. For example, as shown in FIG. It may be formed on a part or on the side surface of the rib 6 adjacent to the base portion 7 as shown in (b).
【0023】リブ6は上記したように、共鳴空間5を形
成して吸音特性を向上させると共に貫通孔8を見えにく
くするために設けるものであるが、この断面形状は種々
変更可能であり、意匠も考慮して適宜設計すればよい。
図1の実施例では、リブ6の先端側が拡がった矩形状と
なっており、従って、リブ6の間の溝9は先端側が狭ま
った形状で、基底部7の貫通孔8を隠す効果が大きい利
点を有している。この他の形状としては、例えば、図4
(a)〜(g)に示すようなものを挙げることができ
る。これらの図において、いずれも下側が空気室とな
り、従って上側が外面(吸音構造の前面)となる。図4
(a)〜(g)に示す吸音体3はいずれも、そのリブ6
が、先端に向かって拡がった断面形状の部分を有してお
り、基底部7或いはリブ側面に形成した貫通孔(図4で
は図示を省略)を隠す効果が大きく、外観が良くなると
共にその貫通孔へのこみやほこりの付着を防止する効果
もある。また、図5(a)、(b)に示すような単純な
断面形状のリブ6を用いることも可能である。この場合
には、吸音体3の製造が容易となる利点が得られる。As described above, the rib 6 is provided to form the resonance space 5 to improve the sound absorption characteristics and to make the through hole 8 less visible, but the cross-sectional shape can be variously changed and the design can be changed. It may be designed in consideration of the above.
In the embodiment of FIG. 1, the rib 6 has a rectangular shape in which the tip end side is widened, and therefore the groove 9 between the ribs 6 has a shape in which the tip end side is narrowed, and the effect of hiding the through hole 8 of the base portion 7 is great. Have advantages. Other shapes include, for example, FIG.
Examples thereof include those shown in (a) to (g). In each of these figures, the lower side is the air chamber, and thus the upper side is the outer surface (front surface of the sound absorbing structure). FIG.
The sound absorbing body 3 shown in each of (a) to (g) has its rib 6
However, since it has a cross-sectional portion that widens toward the tip, it has a great effect of concealing the through hole (not shown in FIG. 4) formed in the base portion 7 or the rib side surface, and the appearance is improved and the penetration is improved. It also has the effect of preventing dust and dirt from adhering to the holes. Further, it is also possible to use a rib 6 having a simple cross-sectional shape as shown in FIGS. In this case, there is an advantage that the sound absorber 3 is easily manufactured.
【0024】図2に示す実施例の吸音体3は、単に複数
のブリ6とそのリブ6間の基底部7のみで構成されてお
り、取付に当たっては、壁面1に対してスペーサ4を介
して取り付けている。しかしながら本発明の吸音体3は
この構成に限らず、取付用の脚を一体に設けた構成とす
る事も可能である。図6はその場合の吸音体3Aを示す
ものであり、前面に複数のリブ6とその間の基底部7を
有し、その両端に脚11を一板構造として有している。
この吸音体3Aでは、両端の脚11を利用して壁面1に
取り付けることにより、壁面1との間に所定厚さを空気
室2を形成できる。The sound absorbing body 3 of the embodiment shown in FIG. 2 is composed of only a plurality of bristle 6 and a base portion 7 between the ribs 6, and upon mounting, it is mounted on the wall surface 1 via the spacer 4. It is attached. However, the sound absorbing body 3 of the present invention is not limited to this structure, and may have a structure in which mounting legs are integrally provided. FIG. 6 shows a sound absorbing body 3A in that case, which has a plurality of ribs 6 on the front surface and a base portion 7 between them, and has legs 11 at both ends thereof as a single plate structure.
In this sound absorbing body 3A, the air chambers 2 having a predetermined thickness can be formed between the sound absorbing body 3A and the wall surface 1 by attaching the sound absorbing body 3 to the wall surface 1 using the legs 11 at both ends.
【0025】図7は本発明の吸音体3と空気室とをユニ
ット化した吸音ユニット13を示すものである。すなわ
ち、この吸音ユニット13は、前面に配置された吸音体
3と、その背後に空気室2を形成するように間隔を開け
て配置された背板14とを一体構造としたものである。
吸音体3としては、上記したものを適宜使用可能であ
る。この吸音ユニット13は単に並べるのみで、一定の
吸音特性を有する吸音壁を容易に形成できる利点を有し
ている。FIG. 7 shows a sound absorbing unit 13 in which the sound absorbing body 3 and the air chamber of the present invention are unitized. That is, the sound absorbing unit 13 has a structure in which the sound absorbing body 3 arranged on the front surface and the back plate 14 arranged behind the sound absorbing body 3 so as to form the air chamber 2 are integrated.
As the sound absorber 3, the above-mentioned ones can be appropriately used. The sound absorbing unit 13 has an advantage that a sound absorbing wall having a constant sound absorbing characteristic can be easily formed by simply arranging the sound absorbing units 13.
【0026】以上に説明した実施例の吸音体3では、背
後の空気室2が一つの大きい空間となっているが、これ
を複数の小室に分割することも可能である。図8はその
場合の実施例を示すものであり、図8(a)に示す吸音
ユニット13Aは、前面に配置した吸音体3が幅の異な
る2種類のリブ6a、6bを交互に且つ間隔の異なる溝
9a、9bをはさんで配置しており、基底部7の一方の
端部の裏面に、従ってリブ6a、6bの一方の側面の延
長線上に、仕切り壁15を設けて空気室を複数の小室2
a、2bに分割している。このような構成とすると、空
気室が複数の容積の空気室2a、2bに分割されること
となり、一方の空気室2aが或る周波数の音を吸音し、
他方の空気室2bがそれとは異なる周波数の音を吸音す
ることとなり、吸音周波数域が拡がる利点が得られる。
また、図8(b)に示す吸音ユニット13Bは、仕切り
壁15がリブ6a、6b内に設けられている。この場合
も、図8(a)と同様の効果が得られる。なお、図8に
示す実施例では、複数に分割した空気室の容積が異なる
構成としているが、この代わりに同じ容積に分割する構
成としてもよい。空気室を小容積の複数の室に分割する
と、分割した空気室の容積に応じた狭い周波数域の音に
対する吸音特性が向上し、従って、発生する騒音の周波
数が狭い領域に限られている場合に有効である。In the sound absorbing body 3 of the embodiment described above, the air chamber 2 behind is one large space, but it is also possible to divide this into a plurality of small chambers. FIG. 8 shows an embodiment in that case. In the sound absorbing unit 13A shown in FIG. 8 (a), the sound absorbing body 3 arranged on the front surface has two types of ribs 6a and 6b having different widths alternately and at intervals. Different grooves 9a and 9b are arranged so as to sandwich a plurality of air chambers by providing a partition wall 15 on the back surface of one end of the base portion 7 and thus on an extension line of one side surface of the ribs 6a and 6b. Small room 2
It is divided into a and 2b. With this configuration, the air chamber is divided into a plurality of volumes of air chambers 2a and 2b, and one of the air chambers 2a absorbs sound of a certain frequency,
The other air chamber 2b absorbs a sound of a frequency different from that of the air chamber 2b, which has an advantage of expanding the sound absorption frequency range.
Further, in the sound absorbing unit 13B shown in FIG. 8B, the partition wall 15 is provided inside the ribs 6a and 6b. Also in this case, the same effect as that of FIG. In the embodiment shown in FIG. 8, the air chambers divided into a plurality have different volumes, but instead, the air chambers may be divided into the same volume. If the air chamber is divided into multiple small-volume chambers, the sound absorption characteristics for sound in a narrow frequency range that corresponds to the volume of the divided air chambers are improved, and therefore the frequency of the generated noise is limited to a narrow region. Is effective for.
【0027】図8の吸音ユニット13A、13Bでは、
前面の吸音体3のリブ6a、6bが単に矩形状のもので
あるが、前面の吸音体3の形状はこれに限らず、図1〜
図5に示したような各種の形状のものを使用可能であ
る。すなわち、図1〜図5に示す吸音体3に対しても背
面に、図8に示す仕切り壁15を設けて、空気室を複数
に分割する構成としてもよい。また、このような仕切り
壁15を設ける際、背板14は必ずしも設けておく必要
はなく、吸音体3を壁面1(図1参照)に取り付けた際
に、その仕切り壁15がその壁面に突き当たり、吸音体
3と壁面との間の空気室を複数に分割する構成としても
よい。In the sound absorbing units 13A and 13B shown in FIG.
Although the ribs 6a and 6b of the sound absorber 3 on the front surface are simply rectangular, the shape of the sound absorber 3 on the front surface is not limited to this.
Various shapes as shown in FIG. 5 can be used. That is, the partition wall 15 shown in FIG. 8 may be provided on the back surface of the sound absorber 3 shown in FIGS. 1 to 5 to divide the air chamber into a plurality of parts. Further, when such a partition wall 15 is provided, the back plate 14 does not necessarily have to be provided, and when the sound absorber 3 is attached to the wall surface 1 (see FIG. 1), the partition wall 15 hits the wall surface. The air chamber between the sound absorbing body 3 and the wall surface may be divided into a plurality of parts.
【0028】以上の実施例では、板材で作られたリブ6
と基底部7とからなる吸音体3を示したが、この吸音体
3に対して吸音材を組み合わせて使用することも可能で
ある。図9(a)、(b)、(c)はその例を示すもの
である。すなわち、図9(a)では、吸音体3の内面
(空気室側の面即ち背面)に、板状の吸音材17を配し
ており、図9(b)では、吸音体3のリブ6間の基底部
7の外面に吸音材18を配している。また、図9(c)
では、リブ6間に形成されている溝9内に円筒状の吸音
材19を配している。ここで使用する吸音材17、1
8、19は、それ自身で吸音効果のある材料であり、通
常、グラスウール、ロックウール、繊維マット材等の多
孔質材、帆布等の膜材等が使用される。このような吸音
材を併用すると、吸音周波数域を拡げることが可能とな
る。In the above embodiment, the rib 6 made of a plate material is used.
Although the sound absorbing body 3 including the base and the base portion 7 is shown, it is also possible to use a sound absorbing material in combination with the sound absorbing body 3. 9 (a), 9 (b), and 9 (c) show such an example. That is, in FIG. 9A, the plate-shaped sound absorbing material 17 is arranged on the inner surface (the surface on the air chamber side, that is, the back surface) of the sound absorbing body 3, and in FIG. 9B, the rib 6 of the sound absorbing body 3 is arranged. A sound absorbing material 18 is arranged on the outer surface of the base portion 7 between them. Also, FIG. 9 (c)
In, the cylindrical sound absorbing material 19 is arranged in the groove 9 formed between the ribs 6. Sound absorbing material 17, 1 used here
Reference numerals 8 and 19 are materials having a sound absorbing effect by themselves, and usually, porous materials such as glass wool, rock wool, fiber mat materials, and film materials such as canvas are used. When such a sound absorbing material is used together, the sound absorbing frequency range can be expanded.
【0029】〔実施例〜〕以下に、本発明の実施例
による各種の吸音体の吸音特性を測定した結果を示す。
使用した吸音構造は図10の〜に示すものであり、
図中に示す寸法の単位はmmである。の吸音体3は
の吸音体3に吸音材17を追加したもの、、の吸音
体3は、の吸音体3の背後の空気室の厚さを変え、且
つ吸音材17、18を追加したものである。〜に示
す吸音体3では、基底部7の中央に直径9mmの貫通孔
8をピッチ50mmで1列形成している。の吸音体3
はの吸音体3に吸音材18を追加したものであり、
、に示す吸音体3では、基底部7の中央に直径10
mmの貫通孔8をピッチ100mmで1列形成してい
る。の吸音体3はの吸音体3に吸音材18を追加し
たものであり、、に示す吸音体3では、狭い方の溝
9aの底面の基底部7の中央に直径9mmの貫通孔8を
ピッチ50mmで1列形成し、広い方の溝9bの底面の
基底部7の中央に、直径10mmの貫通孔8をピッチ1
00mmで1列形成している。また、使用した吸音材1
7、18はグラスウールである。図10に示す各吸音構
造について、それぞれ吸音率を測定し、統計入射吸音率
を求めた。その結果を表1に示す。なお、表1に示す統
計入射吸音率の単位は%である。[Examples] The following shows the results of measuring the sound absorption characteristics of various sound absorbing bodies according to the examples of the present invention.
The sound absorbing structure used is as shown in FIG.
The unit of dimensions shown in the drawing is mm. The sound absorbing body 3 is a sound absorbing body 3 with a sound absorbing material 17 added, and the sound absorbing body 3 with a thickness of an air chamber behind the sound absorbing body 3 is changed and sound absorbing materials 17 and 18 are added. Is. In the sound absorbers 3 shown in to, the through holes 8 having a diameter of 9 mm are formed in one row in the center of the base portion 7 with a pitch of 50 mm. Sound absorber 3
Is a sound absorber 3 with the addition of a sound absorbing material 18,
In the sound absorbing body 3 shown in FIG.
mm through holes 8 are formed in one row with a pitch of 100 mm. The sound absorbing body 3 is a sound absorbing body 3 with a sound absorbing material 18 added, and in the sound absorbing body 3 shown in, a through hole 8 having a diameter of 9 mm is pitched in the center of the base portion 7 on the bottom surface of the narrow groove 9a. A row of 50 mm is formed, and a through hole 8 having a diameter of 10 mm is formed at a pitch of 1 at the center of the base portion 7 on the bottom surface of the wider groove 9b.
One row is formed with 00 mm. Also, used sound absorbing material 1
7 and 18 are glass wool. The sound absorption coefficient was measured for each sound absorption structure shown in FIG. 10 to obtain the statistical incident sound absorption coefficient. Table 1 shows the results. The unit of the statistical incident sound absorption coefficient shown in Table 1 is%.
【0030】〔比較例1〜3〕図11に示すように、壁
面1の前に300mmの空気室2を形成するように孔あ
きせっこうボード20を配置したもの(比較例1)、そ
の孔あきせっこうボード20の背面に厚み25mmのロ
ックウール吸音フェルト22を配置したもの(比較例
2)、壁面1の前に300mmの空気室2を形成するよ
うに孔あき珪酸カルシウム板23を配置し、その背面に
厚み25mmのロックウール吸音フェルト22を配置し
たもの(比較例3)についての吸音結果も表1に示す。[Comparative Examples 1 to 3] As shown in FIG. 11, a perforated gypsum board 20 is arranged so as to form a 300 mm air chamber 2 in front of the wall surface 1 (Comparative Example 1) A rock wool sound absorbing felt 22 having a thickness of 25 mm is arranged on the back surface of a perforated gypsum board 20 (Comparative Example 2), and a perforated calcium silicate plate 23 is arranged in front of the wall surface 1 so as to form an air chamber 2 of 300 mm. Table 1 also shows the sound absorption results of the one having the 25 mm thick rock wool sound absorbing felt 22 arranged on the back surface thereof (Comparative Example 3).
【0031】[0031]
【表1】 [Table 1]
【0032】表1の結果を、図12〜図14のグラフに
示す。この表1及び図12〜図14のグラフから良く分
かるように、実施例、では比較的狭い周波数範囲で
はあるが、高い吸音率を示す領域があり、特に実施例
では125〜160Hzという低周波数域に吸音率のピ
ークがある。従って、リブ6の幅や空気室2の深さを適
当に設計することにより、所望の低周波数域での吸音率
を高くした吸音構造を得ることができる。また、実施例
では複数の周波数域に吸音率の高いピークが存在して
いる。従って、複数の周波数域での吸音が要求される用
途に好適である。更に、吸音材17又は18を併用した
場合と、併用しない場合とを比較すると、ピークの吸音
率はあまり変わりないが、併用した場合(実施例、
、、、)の方が広い周波数範囲で吸音率が向上
している。従って、騒音の周波数範囲が広い場合には、
吸音材の併用が好ましい。また、実施例との結果を
比較すると、実施例の吸音特性の方が優れている。従
って、吸音特性のみを考慮すれば、吸音材18を吸音体
3の外面に配置することが好ましい。The results of Table 1 are shown in the graphs of FIGS. As can be seen from Table 1 and the graphs of FIGS. 12 to 14, the examples have a relatively narrow frequency range, but have a region exhibiting a high sound absorption coefficient, and particularly the examples have a low frequency range of 125 to 160 Hz. There is a peak of sound absorption coefficient. Therefore, by appropriately designing the width of the rib 6 and the depth of the air chamber 2, it is possible to obtain a sound absorbing structure having a high sound absorbing coefficient in a desired low frequency range. Further, in the embodiment, there are peaks with high sound absorption coefficient in a plurality of frequency ranges. Therefore, it is suitable for applications requiring sound absorption in a plurality of frequency ranges. Furthermore, comparing the case where the sound absorbing material 17 or 18 is used together with the case where the sound absorbing material 17 is not used, the peak sound absorption rate does not change much, but the case where the sound absorbing materials 17 and 18 are used together (Examples,
,,,) have improved sound absorption over a wider frequency range. Therefore, when the frequency range of noise is wide,
It is preferable to use a sound absorbing material together. Also, comparing the results with the examples, the sound absorption characteristics of the examples are superior. Therefore, considering only the sound absorbing characteristics, it is preferable to arrange the sound absorbing material 18 on the outer surface of the sound absorbing body 3.
【0033】一方、比較例1では全体的に吸音効果が低
く有効とは言えない。比較例2、3では、吸音効果がか
なり向上するが、主として周波数が200Hz以上で効
果を発揮しており、160Hz以下というような低周波
数域ではさほど効果が向上していない。これに対して、
本発明の実施例〜では160Hz以下の低周波数域
でかなりの吸音効果を発揮しており、しかも、吸音構造
全体の厚さは、比較例1〜3の300mmに対し、15
0mmと半分の厚さでよく、十分な吸音効果をあげてい
る。これは、リブ6に形成した共鳴空間5による効果と
思われる。On the other hand, in Comparative Example 1, the sound absorbing effect is low as a whole and cannot be said to be effective. In Comparative Examples 2 and 3, the sound absorbing effect is considerably improved, but the effect is mainly exhibited at a frequency of 200 Hz or higher, and the effect is not so improved in a low frequency range of 160 Hz or lower. On the contrary,
In Examples 1 to 5 of the present invention, a considerable sound absorbing effect is exhibited in a low frequency range of 160 Hz or lower, and the thickness of the entire sound absorbing structure is 15 mm compared to 300 mm in Comparative Examples 1 to 3.
A thickness of 0 mm and half the thickness is sufficient, and it has a sufficient sound absorbing effect. This is considered to be an effect of the resonance space 5 formed in the rib 6.
【0034】[0034]
【発明の効果】以上に説明したように、本願請求項1の
発明の吸音体は、空気室とは反対側に突出するように且
つ前記空気室に連通する共鳴空間を形成するように設け
られた複数のリブと、該リブの間に形成された基底部と
を有し、そのリブの側面及び基底部の少なくとも一方に
前記空気室に連通する複数の貫通孔を有する構成とした
ことにより、空気室との組み合わせにより低周波数域で
の吸音特性の良い吸音構造を形成でき、しかもその際リ
ブ内の空間が共鳴空間として作用するので吸音特性が良
く、従来の多孔板を用いる場合に比べて吸音構造を薄く
することが可能で、例えば、多孔板を用いた場合の30
0mmに対してその半分の150mmとすることが可能
であり、更に、その外観は、複数のリブが前面に並び、
貫通孔がほとんど目立たない状態となるので、その貫通
孔によるちらつきがなく、従って不快感を与えることが
なく、また、リブの間隔や幅を適宜変えることにより、
種々な外観を与えることができ、種々な意匠に変更で
き、更にそのリブによる補強効果によって吸音体の強度
を向上できる等、種々な効果を有している。As described above, the sound absorbing body of the invention of claim 1 of the present application is provided so as to project to the side opposite to the air chamber and to form a resonance space communicating with the air chamber. By having a plurality of ribs and a base portion formed between the ribs, and having a plurality of through holes communicating with the air chamber on at least one of the side surface and the base portion of the rib, By combining with an air chamber, a sound absorbing structure with good sound absorbing characteristics in the low frequency range can be formed, and at that time the space inside the ribs acts as a resonance space, so the sound absorbing characteristics are good, and compared to the case of using a conventional perforated plate. It is possible to make the sound absorbing structure thin. For example, when the perforated plate is used,
It is possible to make it half, that is, 150 mm, with respect to 0 mm. Furthermore, the appearance is that a plurality of ribs are arranged on the front surface.
Since the through holes are almost inconspicuous, there is no flicker due to the through holes, so no discomfort is given, and by appropriately changing the interval or width of the ribs,
It has various effects such as giving various appearances, changing to various designs, and improving the strength of the sound absorber by the reinforcing effect of the ribs.
【0035】請求項2の発明は、上記の吸音体に、更
に、前記リブの間の基底部の内面若しくは外面の少なく
とも一方に吸音材を配置したことにより、共鳴周波数域
を拡げることができ、広い周波数範囲における吸音特性
を向上できるという効果を有している。According to a second aspect of the present invention, by further disposing a sound absorbing material on at least one of the inner surface and the outer surface of the base between the ribs, the resonance frequency range can be expanded. It has the effect of improving the sound absorption characteristics in a wide frequency range.
【0036】また、請求項3の発明は、上記の吸音体の
前記リブ及び基底部の少なくとも一方の裏面に、背後の
空気室を複数の小室に分割する仕切壁を設けたことによ
り、独立した複数の小室を形成し、その独立した小室の
容積を所望の共鳴周波数に対応した値に設計すること
で、容易に所望の吸音特性の吸音構造を設計できるとい
う効果を有している。The invention of claim 3 is independent by providing a partition wall on the back surface of at least one of the rib and the base of the sound absorbing body to divide the air chamber behind into a plurality of small chambers. By forming a plurality of small chambers and designing the volume of the independent small chambers to a value corresponding to the desired resonance frequency, it is possible to easily design a sound absorbing structure having a desired sound absorbing characteristic.
【0037】更に、本願請求項4の発明は、上記の吸音
体に設けるリブが、先端に向かって拡がった断面形状の
部分を有しているので、そのリブが、基底部或いはリブ
側面に形成した貫通孔を隠す効果が大きく、外観が良く
なると共にその貫通孔へのごみやほこりの付着を防止す
る効果もあり、長期間に渡って、貫通孔の詰まりを防止
できるという効果を有している。Further, in the invention of claim 4 of the present application, since the rib provided on the sound absorbing body has a portion having a cross-sectional shape that widens toward the tip, the rib is formed on the base portion or the rib side surface. The effect of concealing the through holes is large, the appearance is improved, and there is also the effect of preventing dust and dirt from adhering to the through holes, which has the effect of preventing clogging of the through holes for a long period of time. There is.
【0038】請求項5の発明は、上記の吸音体に設ける
複数のリブの大きさを2種類以上とし、各リブが形成す
る共鳴空間の容積が少なくとも2種類存在する構成とし
たことにより、共鳴周波数を複数とすることができ、広
い周波数範囲での吸音特性を向上できるという効果を有
している。特に、この構成の吸音体に吸音材を併用する
ことにより、広い周波数範囲での吸音特性を向上でき、
広い周波数範囲の騒音を吸収できるという効果が得られ
る。According to a fifth aspect of the present invention, the size of the plurality of ribs provided on the sound absorbing body is two or more, and the volume of the resonance space formed by each rib is at least two. There is an effect that a plurality of frequencies can be set and sound absorption characteristics in a wide frequency range can be improved. In particular, by using a sound absorbing material together with the sound absorbing body of this configuration, it is possible to improve sound absorbing characteristics in a wide frequency range,
The effect that noise in a wide frequency range can be absorbed is obtained.
【0039】請求項6の発明は、上記した吸音体と、そ
の背後に空気室を形成するように間隔を開けて背板を配
置し、その吸音体と背板とを一体構造としてユニット化
したことにより、単にこの吸音ユニットを並べるのみ
で、所定の吸音特性の壁面を形成でき、施工現場での吸
音構造の製造を容易とできるという効果を有している。According to a sixth aspect of the present invention, the sound absorber described above and the back plate are arranged at a distance so as to form an air chamber behind the sound absorber, and the sound absorber and the back plate are integrated into a unit. As a result, by simply arranging the sound absorbing units, a wall surface having a predetermined sound absorbing characteristic can be formed, and the sound absorbing structure can be easily manufactured at a construction site.
【図1】本発明の一実施例による吸音体を用いて構成し
た吸音構造の概略斜視図FIG. 1 is a schematic perspective view of a sound absorbing structure configured by using a sound absorbing body according to an embodiment of the present invention.
【図2】その吸音構造の概略断面図FIG. 2 is a schematic sectional view of the sound absorbing structure.
【図3】(a)、(b)はそれぞれ、上記実施例とは異
なる位置に貫通孔を設けた実施例を示す概略断面図3A and 3B are schematic cross-sectional views showing an embodiment in which a through hole is provided at a position different from the above embodiment.
【図4】(a)〜(g)はそれぞれ、異なる断面を備え
た吸音体の実施例を示す概略断面図4A to 4G are schematic cross-sectional views showing an embodiment of a sound absorber having different cross sections.
【図5】(a)、(b)はそれぞれ、上記実施例とは更
に異なる断面を備えた吸音体の実施例を示す概略断面図5 (a) and 5 (b) are schematic cross-sectional views each showing an embodiment of a sound absorbing body having a cross section different from that of the above-mentioned embodiment.
【図6】他の実施例による吸音体を示す概略断面図FIG. 6 is a schematic sectional view showing a sound absorbing body according to another embodiment.
【図7】本発明の実施例による吸音ユニットの概略断面
図FIG. 7 is a schematic sectional view of a sound absorbing unit according to an embodiment of the present invention.
【図8】(a)、(b)はそれぞれ、本発明の他の実施
例による吸音ユニットの概略断面図8A and 8B are schematic cross-sectional views of a sound absorbing unit according to another embodiment of the present invention.
【図9】(a)、(b)はそれぞれ、本発明の他の実施
例による吸音体を示す概略断面図9A and 9B are schematic cross-sectional views showing a sound absorbing body according to another embodiment of the present invention.
【図10】実施例〜の断面構造を示す概略断面図FIG. 10 is a schematic cross-sectional view showing a cross-sectional structure of Examples 1 to 5.
【図11】比較例1〜3の断面構造を示す概略断面図FIG. 11 is a schematic sectional view showing a sectional structure of Comparative Examples 1 to 3.
【図12】実施例、、、、の吸音特性を示す
グラフFIG. 12 is a graph showing sound absorption characteristics of Examples ,,,
【図13】実施例、、、の吸音特性を示すグラ
フFIG. 13 is a graph showing sound absorption characteristics of Examples ,,,
【図14】実施例、の吸音特性を示すグラフFIG. 14 is a graph showing sound absorption characteristics of the example.
1 壁面 2 空気室 2a、2b 小室 3 吸音体 4 スペーサ 5 共鳴空間 6、6a、6b リブ 7 基底部 8 貫通孔 9、9a、9b 溝 11 脚 13、13A、13B 吸音ユニット 14 背板 15 仕切り壁 17、18、19 吸音材 1 Wall Surface 2 Air Chamber 2a, 2b Small Chamber 3 Sound Absorber 4 Spacer 5 Resonance Space 6, 6a, 6b Rib 7 Base 8 Through Holes 9, 9a, 9b Groove 11 Leg 13, 13A, 13B Sound Absorption Unit 14 Back Plate 15 Partition Wall 17, 18, 19 Sound absorbing material
フロントページの続き (72)発明者 水上 忠則 東京都府中市緑町3−17−11 ドーミー東 府中305 (72)発明者 田崎 豊 神奈川県中郡二宮町中里2−34−16 (72)発明者 三神 貴 埼玉県所沢市中新井1−41−2 日東紡績 株式会社日東寮Front Page Continuation (72) Inventor Tadanori Mizukami 3-17-11 Midoricho, Fuchu, Tokyo Dormy Higashi Fuchu 305 (72) Inventor Yutaka Tasaki 2-34-16 Nakazato, Ninomiya-cho, Naka-gun, Kanagawa Prefecture (72) Inventor San Kamitaka 1-41-2 Nakaarai, Tokorozawa, Saitama Nitto Spinning Co., Ltd. Nitto Dormitory
Claims (6)
吸音構造を構成する吸音体であって、前記空気室とは反
対側に突出するように且つ前記空気室に連通する共鳴空
間を形成するように設けられた複数のリブと、該リブの
間に形成された基底部とを有し、前記リブの側面及び基
底部の少なくとも一方に前記空気室に連通する複数の貫
通孔を有することを特徴とする吸音体。1. A sound absorbing body which is arranged in front of an air chamber and constitutes a sound absorbing structure together with the air chamber, wherein a resonance space which projects to a side opposite to the air chamber and communicates with the air chamber. It has a plurality of ribs provided so as to form, and a base portion formed between the ribs, and has a plurality of through holes communicating with the air chamber on at least one of the side surface and the base portion of the rib. A sound absorbing body characterized by that.
くは外面の少なくとも一方に配置された吸音材を具備す
ることを特徴とする請求項1記載の吸音体。2. The sound absorbing body according to claim 1, further comprising a sound absorbing material disposed on at least one of an inner surface and an outer surface of a base portion between the ribs.
一方の裏面に、背後の空気室を分割する仕切壁を有する
ことを特徴とする請求項1又は2記載の吸音体。3. The sound absorbing body according to claim 1, further comprising a partition wall that divides an air chamber behind the rib on at least one of the back surface of the rib and the base portion.
面形状の部分を有することを特徴とする請求項1から3
のいずれか1項記載の吸音体。4. The rib according to claim 1, wherein the rib has a portion having a cross-sectional shape that widens toward the tip.
The sound absorber according to any one of 1.
積が、少なくとも2種類あることを特徴とする請求項1
から4のいずれか1項記載の吸音体。5. The resonance space formed by the plurality of ribs has at least two types of volumes.
5. The sound absorbing body according to any one of items 4 to 4.
吸音体と、その背後に空気室を形成するように間隔を開
けて配置された背板とを一体構造として有することを特
徴とする吸音ユニット。6. A sound absorbing body according to any one of claims 1 to 5 and a back plate, which is arranged at a distance so as to form an air chamber behind the sound absorbing body, as an integral structure. Sound absorption unit.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7171465A JP2894249B2 (en) | 1995-06-14 | 1995-06-14 | Sound absorber and sound absorbing unit |
KR1019970702366A KR970706559A (en) | 1994-10-11 | 1995-10-09 | Sound absorbing body, sound absorbing plate and sound absorbing unit |
PCT/JP1995/002067 WO1996011464A1 (en) | 1994-10-11 | 1995-10-09 | Sound absorption body, sound absorption plate and sound absorption unit |
EP95933643A EP0786759A4 (en) | 1994-10-11 | 1995-10-09 | Sound absorption body, sound absorption plate and sound absorption unit |
US08/809,731 US5854453A (en) | 1994-10-11 | 1995-10-09 | Sound absorbing body, sound absorbing plate, and sound absorbing unit |
TW084111389A TW289779B (en) | 1994-10-11 | 1995-10-28 | |
US09/205,276 US6035965A (en) | 1994-10-11 | 1998-12-04 | Sound absorbing body, sound absorbing board, and sound absorbing unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7171465A JP2894249B2 (en) | 1995-06-14 | 1995-06-14 | Sound absorber and sound absorbing unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08338082A true JPH08338082A (en) | 1996-12-24 |
JP2894249B2 JP2894249B2 (en) | 1999-05-24 |
Family
ID=15923616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7171465A Expired - Fee Related JP2894249B2 (en) | 1994-10-11 | 1995-06-14 | Sound absorber and sound absorbing unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2894249B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100366368B1 (en) * | 2000-03-13 | 2002-12-31 | 한국수력원자력 주식회사 | Sound absorbent device |
KR100377952B1 (en) * | 2000-06-12 | 2003-03-31 | (주)진양빅우드 | Sound absorbing wall and the method for manufacturing the wall |
KR101404276B1 (en) * | 2009-11-30 | 2014-06-05 | 현대중공업 주식회사 | Sound insulation method for bulkhead |
JP2015102731A (en) * | 2013-11-26 | 2015-06-04 | 理研軽金属工業株式会社 | Sound absorption structure |
CN114203137A (en) * | 2021-11-04 | 2022-03-18 | 华中科技大学 | Multifunctional metamaterial with low-frequency sound absorption and bearing functions and additive manufacturing method thereof |
-
1995
- 1995-06-14 JP JP7171465A patent/JP2894249B2/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100366368B1 (en) * | 2000-03-13 | 2002-12-31 | 한국수력원자력 주식회사 | Sound absorbent device |
KR100377952B1 (en) * | 2000-06-12 | 2003-03-31 | (주)진양빅우드 | Sound absorbing wall and the method for manufacturing the wall |
KR101404276B1 (en) * | 2009-11-30 | 2014-06-05 | 현대중공업 주식회사 | Sound insulation method for bulkhead |
JP2015102731A (en) * | 2013-11-26 | 2015-06-04 | 理研軽金属工業株式会社 | Sound absorption structure |
CN114203137A (en) * | 2021-11-04 | 2022-03-18 | 华中科技大学 | Multifunctional metamaterial with low-frequency sound absorption and bearing functions and additive manufacturing method thereof |
Also Published As
Publication number | Publication date |
---|---|
JP2894249B2 (en) | 1999-05-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6035965A (en) | Sound absorbing body, sound absorbing board, and sound absorbing unit | |
ES2609411T3 (en) | Acoustic absorber | |
US4155211A (en) | Sound absorbing panel | |
JP2547927B2 (en) | Resonance type sound absorbing and sound insulation panel | |
JP2012062701A (en) | Soundproof structure | |
US4842097A (en) | Sound absorbing structure | |
JPH02272131A (en) | Sound-absorbing panel | |
JP2894249B2 (en) | Sound absorber and sound absorbing unit | |
CN110863577A (en) | Single-leg strip seam sound absorption structure | |
KR100694000B1 (en) | A sound absorbing panel having the three-layer | |
JPH08109688A (en) | Sound absorbing board | |
JP3071637B2 (en) | Resonator type sound absorber and sound absorbing ceiling | |
DE10151474A1 (en) | Sound absorber incorporates porous absorber layer on front side of which are formed strip-shaped, soundtight covers (3) of specific width, separated by narrow gaps | |
JP2015229910A (en) | Sound absorption panel using core material and porous board material | |
CN217506890U (en) | Sound absorption structure | |
CN213682970U (en) | Composite sound absorption board | |
JP3045294B1 (en) | Sound absorbing wall | |
KR960007197B1 (en) | Absorbing plate for road | |
KR102453593B1 (en) | SOUND ABSORBING PANEL BY USING Helmholtz RESONANCE PRINCIPLE | |
JP3952903B2 (en) | Panel device | |
KR102052618B1 (en) | Air-passing soundproof panel and Air-passing soundproof wall using the same | |
KR101177068B1 (en) | Refraction type soundproofing pannel | |
WO2004005636A1 (en) | Sound-absorbing material | |
JPH0626130A (en) | Sound absorbing body | |
CN214738995U (en) | Building outer wall with good sound absorption effect |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |