JPH09198052A - Sound absorbing plate material - Google Patents
Sound absorbing plate materialInfo
- Publication number
- JPH09198052A JPH09198052A JP8006272A JP627296A JPH09198052A JP H09198052 A JPH09198052 A JP H09198052A JP 8006272 A JP8006272 A JP 8006272A JP 627296 A JP627296 A JP 627296A JP H09198052 A JPH09198052 A JP H09198052A
- Authority
- JP
- Japan
- Prior art keywords
- sound absorbing
- absorbing plate
- plate material
- sound
- base portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、吸音する必要があ
る場所に設置して用いることができる吸音板材に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorbing plate material that can be installed and used in a place where it is necessary to absorb sound.
【０００２】[0002]
【従来の技術】従来、貫通孔をもつ板は、裏面側に空気
層を形成するように使用されることにより、吸音板材と
してヘルムホルツの共鳴による吸音効果が得られること
が知られている。例えば、図６に示される吸音板材１Ｄ
は、表面２０ｄと裏面２１ｄとを連通する複数の通気孔
３０ｄをもち、裏面２１ｄ側に空気層ｇを形成するよう
に使用される。2. Description of the Related Art Conventionally, it has been known that a plate having a through hole is used to form an air layer on the rear surface side, and as a sound absorbing plate material, a sound absorbing effect due to resonance of Helmholtz can be obtained. For example, the sound absorbing plate material 1D shown in FIG.
Has a plurality of vent holes 30d that communicate the front surface 20d and the back surface 21d, and is used to form an air layer g on the back surface 21d side.
【０００３】すなわち、吸音板材１Ｄは、その表面２０
ｄを通気孔３０ｄへの音の入射側（音の発生源側）に対
向する位置に向けるとともに、裏面２１ｄ側に所定厚さ
の空気層ｅを形成できるように、裏面２１ｄに対向する
対向基材７の壁面７０とに所定の間隔Ｌ１を設けた状態
で図略の保持部材により固定、保持され、使用に供され
る。この吸音板材１Ｄは、その使用時に厚さ方向の設置
スペースが少なくてすむ利点を備える。また、その使用
例としては、例えば騒音を発生させるエンジンの上方周
囲を覆うようにして配置し騒音を減衰したり、音響室の
壁として用い、不要な雑音を減衰したりするために用い
られる。That is, the sound absorbing plate 1D has a surface 20
Directing d toward the position facing the sound incident side (sound source side) to the vent hole 30d, and facing the back surface 21d so that the air layer e having a predetermined thickness can be formed on the back surface 21d side. The material 7 is fixed and held by a holding member (not shown) in a state of being provided with a predetermined distance L1 from the wall surface 70 of the material 7, and used. The sound absorbing plate member 1D has an advantage that it requires less installation space in the thickness direction when used. Further, as a usage example thereof, for example, the engine is arranged so as to cover the upper periphery of the engine that generates noise to attenuate the noise, or it is used as a wall of the acoustic room to attenuate unnecessary noise.
【０００４】[0004]
【発明が解決しようとする課題】ところが、前記従来の
吸音板材１Ｄの場合によると、その使用時にヘルムホル
ツの共鳴による吸音効果は、以下の公式に適合したもの
となる。However, according to the case of the conventional sound absorbing plate 1D, the sound absorbing effect due to the resonance of Helmholtz at the time of its use conforms to the following formula.
【０００５】[0005]
【数１】 [Equation 1]
【０００６】前記公式によると、図７の特性曲線ｂに示
されるように、狭い周波数領域に限定される。このた
め、吸音板材１Ｄの使用対象範囲も限られたものとな
る。そこで、吸音板材１Ｄを用いた場合でも、広い周波
数領域で吸音効果が得られるように、前記通気孔３０ｄ
の孔径（内径）、孔ピッチなどを種々変化させて分布さ
せてみても、飛躍的に広い周波数領域での共鳴による吸
音効果が得られない。この理由としては、ヘルムホルツ
の共鳴は、通気孔の開口率が数パーセント以下でないと
効果が期待できないため、内径、ピッチの分布範囲が限
定されてしまうためである。According to the above formula, as shown by the characteristic curve b in FIG. 7, it is limited to a narrow frequency range. Therefore, the range of use of the sound absorbing plate material 1D is also limited. Therefore, even if the sound absorbing plate member 1D is used, the vent hole 30d is provided so that the sound absorbing effect can be obtained in a wide frequency range.
Even if the hole diameter (inner diameter), the hole pitch, etc. are varied and distributed, the sound absorbing effect due to resonance in a dramatically wide frequency range cannot be obtained. The reason for this is that the Helmholtz resonance cannot be expected to be effective unless the opening ratio of the ventilation holes is several percent or less, so that the distribution range of the inner diameter and the pitch is limited.
【０００７】本発明は、前記事情に鑑みなされたもの
で、従来の吸音板材の利点を備え、かつ従来の吸音板材
の場合よりも広い周波数領域で吸音効果が得られる吸音
板材を提供することを課題とする。The present invention has been made in view of the above circumstances, and provides a sound absorbing plate material having the advantages of the conventional sound absorbing plate material and capable of obtaining a sound absorbing effect in a wider frequency range than that of the conventional sound absorbing plate material. It is an issue.
【０００８】[0008]
【課題を解決するための手段】本発明の吸音板材は、裏
面側に空気層を形成するように使用される吸音板材であ
り、板状の基部と該基部の少なくとも一方の面に突出
し、他方の面と連通する通気孔を形成する長さの異なる
複数種の筒状部とからなることを特徴とする。A sound-absorbing plate material of the present invention is a sound-absorbing plate material used to form an air layer on the back surface side, and has a plate-shaped base portion and at least one surface of the base portion, and the other. It is characterized by comprising a plurality of types of tubular portions having different lengths that form ventilation holes communicating with the surface of the.
【０００９】[0009]
【発明の実施の形態】前記複数種の筒状部は、内径が同
じで長さを異にするもの、内径が異なり長さを異にする
もの、板状基部のー端面より突出する筒部により形成さ
れたもの、板状基部のー端面および他端面より突出する
もの、音の導入側の開口より空気層側の開口に向かって
内径が小さくなるテーパ状（円錐状）の通気孔を備えた
もの、などとすることができる。BEST MODE FOR CARRYING OUT THE INVENTION The plurality of types of tubular portions have the same inner diameter but different lengths, those having different inner diameters and different lengths, the tubular portion protruding from the end face of the plate-shaped base portion. With a tapered base (conical shape) whose inner diameter becomes smaller toward the air layer side opening than the sound introduction side opening. It can be a thing.
【００１０】また、板状の基部は、前記筒状部の周囲を
所定の間隔を隔てて取り囲む筒状の隔壁部をもつ構成と
することができる。吸音板材は、成形型により樹脂成形
でき、軽くて扱い易く、再生処理が容易な材質を用いる
ことが好ましい。前記材質としては、例えば、ポリプロ
ピレン、ポリエチレン、ポリエステル、ポリアミドなど
を用いることができる。Further, the plate-shaped base portion may have a cylindrical partition wall portion surrounding the cylindrical portion at a predetermined interval. As the sound absorbing plate material, it is preferable to use a material that can be resin-molded by a molding die, is light and easy to handle, and can be easily recycled. As the material, for example, polypropylene, polyethylene, polyester, polyamide or the like can be used.
【００１１】[0011]
（実施例１）本発明の吸音板材の実施例１を図１、図２
基づいて説明する。図１に断面して示す実施例１の吸音
板材１は、ポリプロピレン製の板状の基部２と、基部２
の裏面２１に一体的に形成されて突出するとともに、表
面２０と連通し互いに同じ内径で長さが４種類に設定さ
れた通気孔３０、４０、５０、６０を備えた筒状部３、
４、５、６とからなる。(Embodiment 1) Embodiment 1 of the sound absorbing plate material of the present invention is shown in FIGS.
It will be described based on the following. A sound absorbing plate material 1 of Example 1 shown in cross section in FIG. 1 is a polypropylene plate-shaped base portion 2 and a base portion 2.
A cylindrical portion 3 which is integrally formed on the back surface 21 of the above, and which has the vent holes 30, 40, 50, 60 communicating with the front surface 20 and having the same inner diameter and four lengths.
It consists of 4, 5, and 6.
【００１２】基部２の板厚ｔは、１．０ｍｍである。筒
状部３、４、５、６の基部２への設置数は、それぞれ１
０個／１００ｃｍ2である。筒状部３の通気孔３０の長
さは、２．０ｍｍ、筒状部４の通気孔４０の長さは、
４．０ｍｍ、筒状部５の通気孔５０の長さは、６．０ｍ
ｍ、筒状部６の通気孔６０の長さは、８．０ｍｍであ
る。通気孔３０、４０、５０、６０の内径は、２．０ｍ
ｍである。The plate thickness t of the base portion 2 is 1.0 mm. The number of the tubular parts 3, 4, 5, 6 installed on the base part 2 is 1 each.
0/100 cm 2 . The length of the ventilation hole 30 of the tubular portion 3 is 2.0 mm, and the length of the ventilation hole 40 of the tubular portion 4 is
4.0 mm, the length of the ventilation hole 50 of the tubular portion 5 is 6.0 m
m, and the length of the vent hole 60 of the tubular portion 6 is 8.0 mm. The inner diameter of the vent holes 30, 40, 50, 60 is 2.0m
m.
【００１３】このように、構成された吸音板材１は、基
部２の表面２０を各通気孔３０、４０、５０、６０への
音の入射側（音の発生源側、矢印参考）に対向する位置
に向けるとともに、裏面２１側に所定厚さの空気層ｇを
形成できるように、裏面２１に対向する対向基材７の壁
面７０とに所定の間隔Ｌ１を設けた状態で図略の保持部
材により固定、保持され、使用に供される。In the thus constructed sound absorbing plate material 1, the surface 20 of the base portion 2 faces the sound incident side to each of the ventilation holes 30, 40, 50 and 60 (sound source side, see arrow). A holding member (not shown) in a state in which a predetermined gap L1 is provided between the wall surface 70 of the counter base material 7 facing the back surface 21 so that the air layer g having a predetermined thickness can be formed on the back surface 21 side while facing the position. It is fixed and held by and is used.
【００１４】その使用例としては、例えば騒音を発生さ
せるエンジンの上方周囲を覆うようにして配置し、騒音
を減衰するために用いられる。この吸音板材１は、その
使用時に厚さ方向の設置スペースが少なくてすむ利点を
備える。この吸音板材１によれば、基部２の裏面２１
と、対向基材７の壁面７０との間に前記間隔Ｌ１の空気
層ｇが形成され、これに加えてさらに複数種の筒状部
３、４、５、６の異なる長さの通気孔３０、４０、５
０、６０に、それぞれの内容積に応じた空気の塊（マ
ス）ｅ１、ｅ２、ｅ３、ｅ４が形成される。As an example of its use, for example, it is arranged so as to cover the upper periphery of an engine that generates noise, and is used to attenuate the noise. The sound absorbing plate member 1 has an advantage that it requires less installation space in the thickness direction when used. According to this sound absorbing plate material 1, the back surface 21 of the base 2 is
And the wall surface 70 of the facing base material 7 are formed with the air layer g having the gap L1. In addition to this, the air holes 30 having different lengths of the tubular portions 3, 4, 5, 6 of a plurality of types are further formed. , 40, 5
At 0 and 60, air masses (mass) e1, e2, e3, and e4 corresponding to the respective internal volumes are formed.
【００１５】すなわち、吸音板材１の場合、その使用時
にヘルムホルツの共鳴による吸音効果は、以下の公式に
適合したものとなる。That is, in the case of the sound absorbing plate material 1, the sound absorbing effect due to the resonance of Helmholtz at the time of its use conforms to the following formula.
【００１６】[0016]
【数２】 [Equation 2]
【００１７】このため、図２に示されるように、空気の
塊（マス）ｅ１、ｅ２、ｅ３、ｅ４での共鳴による周波
数領域ｂ１、ｂ２、ｂ３、ｂ４の吸音とが合成され、か
つ全体として広い周波数領域Ｂの吸音が可能となる。実
質的には、従来の吸音板材１Ｄによる周波数領域ｂ（図
７参照）を含め、周波数領域ｂより低い周波数領域側ま
での広い範囲での音波を吸音でき、かつ減衰できる。Therefore, as shown in FIG. 2, the sound absorption in the frequency regions b1, b2, b3, b4 due to the resonance in the air masses (mass) e1, e2, e3, e4 is combined, and as a whole. Sound absorption in a wide frequency range B is possible. Substantially, the sound wave can be absorbed and attenuated in a wide range up to the frequency range lower than the frequency range b including the frequency range b (see FIG. 7) by the conventional sound absorbing plate material 1D.
【００１８】前記筒状部３、４、５、６は、前記個数お
よび種類や、通気孔３０、４０、５０、６０の長さを限
定されるものではなく、目的に応じて種々設定できる。 （実施例１の変形例）前記実施例１の変形例として、前
記筒状部３、４、５、６の通気孔３０、４０、５０、６
０の長さおよび設置個数をそのままとし、それぞれ内径
を小さくすることにより、前記実施例１の場合よりも、
さらに低い周波数領域の吸音が可能となる（但し、基部
２の厚さｔを実施例１の吸音板材１および従来の吸音板
材１Ｄと同じとして比較した場合）。The number and type of the cylindrical portions 3, 4, 5, 6 and the length of the ventilation holes 30, 40, 50, 60 are not limited, and can be variously set according to the purpose. (Modification of First Embodiment) As a modification of the first embodiment, the ventilation holes 30, 40, 50, 6 of the tubular portions 3, 4, 5, 6 are described.
By keeping the length of 0 and the number of installations unchanged and making the inner diameter smaller, respectively, as compared with the case of the first embodiment,
Sound absorption in a lower frequency range is possible (provided that the thickness t of the base 2 is the same as that of the sound absorbing plate material 1 of Example 1 and the conventional sound absorbing plate material 1D).
【００１９】（実施例２）本発明の吸音板材の実施例２
を図３に基づいて説明する。図３に断面して示す実施例
２の吸音板材１Ａは、筒状部３ａ、４ａ、５ａ、６ａを
基部２ａの表面２０ａ側にも突出させたこと以外は、実
施例１の吸音板材１と同じ構成である。(Example 2) Example 2 of the sound absorbing plate material of the present invention
Will be described with reference to FIG. The sound absorbing plate material 1A of the second embodiment shown in cross section in FIG. 3 is the same as the sound absorbing plate material 1 of the first embodiment except that the cylindrical portions 3a, 4a, 5a, 6a are also projected to the surface 20a side of the base portion 2a. It has the same structure.
【００２０】基部２ａの板厚ｔは、１．０ｍｍである。
筒状部３ａ、４ａ、５ａ、６ａの基部２ａへの設置数
は、それぞれ１０個／１００ｃｍ2 である。筒状部３ａ
の通気孔３０ａの長さは、２．０ｍｍ、筒状部４ａの通
気孔４０ａの長さは、４．０ｍｍ、筒状部５ａの通気孔
５０ａの長さは、６．０ｍｍ、筒状部６ａの通気孔６０
ａの長さは、８．０ｍｍである。通気孔３０ａ、４０
ａ、５０ａ、６０ａの内径は、２．０ｍｍである。The plate thickness t of the base portion 2a is 1.0 mm.
The number of the tubular parts 3a, 4a, 5a, 6a installed on the base part 2a is 10 pieces / 100 cm 2 , respectively. Cylindrical part 3a
The ventilation hole 30a has a length of 2.0 mm, the ventilation hole 40a of the tubular portion 4a has a length of 4.0 mm, and the ventilation hole 50a of the tubular portion 5a has a length of 6.0 mm. 6a vent 60
The length of a is 8.0 mm. Vent holes 30a, 40
The inner diameter of a, 50a, 60a is 2.0 mm.
【００２１】この吸音板材１Ａの場合も、筒状部３ａ、
４ａ、５ａ、６ａの異なる長さの通気孔３０ａ、４０
ａ、５０ａ、６０ａに、それぞれの内容積に応じた空気
の塊（マス）ｅ１、ｅ２、ｅ３、ｅ４が形成されるた
め、実施例１の吸音板材１と同じ作用効果が得られる。 （実施例３）本発明の吸音板材の実施例３を図４に基づ
いて説明する。Also in the case of this sound absorbing plate material 1A, the cylindrical portion 3a,
4a, 5a, 6a different length ventilation holes 30a, 40
Since air masses (mass) e1, e2, e3, e4 corresponding to the respective internal volumes are formed in a, 50a, 60a, the same operational effect as the sound absorbing plate material 1 of the first embodiment can be obtained. (Embodiment 3) A third embodiment of the sound absorbing plate material of the present invention will be described with reference to FIG.
【００２２】図４に断面して示す実施例３の吸音板材１
Ｂは、筒状部３、４、５、６のそれぞれの周囲を取り囲
む周壁部８を設けたこと以外は、実施例１の吸音板材１
の構成と同じである。従って、実施例１と異なる構成部
分のみを説明し、同じ構成部分には同じ符号を付与しそ
の説明を省略する。この吸音板材１Ｂの周壁部８は、基
部２ｂの裏面２１に一体的に形成されて突出する長さＬ
２が１５ｍｍで筒状部３、４、５、６より長く、対向す
る壁間距離ｄが１０〜 １５ｍｍのものである。Sound absorbing plate material 1 of Example 3 shown in section in FIG.
B is the sound absorbing plate member 1 of the first embodiment except that the peripheral wall portion 8 surrounding each of the cylindrical portions 3, 4, 5, and 6 is provided.
The configuration is the same as that of. Therefore, only the components that are different from the first embodiment will be described, the same components will be assigned the same reference numerals, and description thereof will be omitted. The peripheral wall portion 8 of the sound absorbing plate material 1B is formed integrally with the back surface 21 of the base portion 2b and has a protruding length L.
2 is 15 mm, longer than the tubular portions 3, 4, 5, and 6, and the distance d between the opposing walls is 10 to 15 mm.
【００２３】吸音板材１Ｂによれば、実施例１の作用効
果に加えて前記周壁部８による以下の作用効果が得られ
る。すなわち、空気層ｇを半独立化させ、隣接する通
気孔の影響を小さくすることが可能。通気孔１個当た
りの空気層体積Ｖを制御でき、対応周波数のチューニン
グ範囲がさらに広くなる。なお、周壁部８は、裏面２１
側より見て円筒状、四角筒状、多角形筒状のものとする
ことができる。According to the sound absorbing plate material 1B, in addition to the working effects of the first embodiment, the following working effects of the peripheral wall portion 8 can be obtained. That is, it is possible to make the air layer g semi-independent and reduce the influence of the adjacent vent holes. The volume V of the air layer per vent can be controlled, and the tuning range of the corresponding frequency is further widened. The peripheral wall portion 8 has a back surface 21.
The shape may be a cylindrical shape, a square tubular shape, or a polygonal tubular shape when viewed from the side.
【００２４】（実施例４）本発明の吸音板材の実施例４
を図５に基づいて説明する。図５に断面して示す実施例
４の吸音板材１Ｃは、板状の基部２ｃと、基部２ｃの裏
面２１ｃより突出、形成するとともに、表面２０ｃ側よ
り裏面２１ｃ側に向かって内径が小さくなるテーパ状
（円錐状）の通気孔３０ｃ、４０ｃ、５０ｃ、６０ｃを
備えた筒状部３ｃ、４ｃ、５ｃ、６ｃとよりなる。(Example 4) Example 4 of the sound absorbing plate material of the present invention
Will be described with reference to FIG. A sound-absorbing plate material 1C of Example 4 shown in cross section in FIG. 5 is formed by projecting and forming a plate-shaped base portion 2c and a back surface 21c of the base portion 2c, and has a taper whose inner diameter decreases from the front surface 20c side toward the back surface 21c side. It is composed of tubular portions 3c, 4c, 5c, and 6c provided with vent holes 30c, 40c, 50c, and 60c having a shape (conical shape).
【００２５】基部２ｃの板厚ｔは、１．０ｍｍである。
筒状部３ｃ、４ｃ、５ｃ、６ｃの基部２ｃへの設置数
は、それぞれ１０個／１００ｃｍ2 である。筒状部３ｃ
の通気孔３０ｃの長さは、２．０ｍｍ、筒状部４ｃの通
気孔４０ｃの長さは、４．０ｍｍ、筒状部５ｃの通気孔
５０ｃの長さは、６．０ｍｍ、筒状部６ｃの通気孔６０
ｃの長さは、８．０ｍｍである。通気孔３０ｃ、４０
ｃ、５０ｃ、６０ｃの表面２０ｃ側の内径は、２．５ｍ
ｍである。通気孔３０ｃ、４０ｃ、５０ｃ、６０ｃの裏
面２１ｃ側の内径は、１．５ｍｍである。The plate thickness t of the base portion 2c is 1.0 mm.
The number of the tubular portions 3c, 4c, 5c, 6c installed on the base portion 2c is 10 pieces / 100 cm 2 , respectively. Cylindrical part 3c
Of the ventilation hole 30c of 2.0 mm, the length of the ventilation hole 40c of the tubular portion 4c is 4.0 mm, the length of the ventilation hole 50c of the tubular portion 5c is 6.0 mm, the tubular portion 6c vent 60
The length of c is 8.0 mm. Vent holes 30c, 40
The inner diameter of c, 50c, 60c on the surface 20c side is 2.5m.
m. The inner diameter of the ventilation holes 30c, 40c, 50c, 60c on the rear surface 21c side is 1.5 mm.
【００２６】この吸音板材１Ｃによれば、ほぼ実施例１
の場合と同じ作用効果が得られる。According to this sound absorbing plate material 1C, almost the same as in Example 1
The same effect as in the case of can be obtained.
【００２７】[0027]
【発明の効果】本発明の吸音板材では、板状の基部の厚
さを変えることなく、複数の筒状部の通気孔長さを種々
設定することにより、吸音目的とする音波の周波数に適
合できる。従って、本発明の吸音板材によると、通気孔
長さを異にする複数種類の筒状部を、板状の基部に形成
させた構成であるため、吸音できる音波の周波数帯領域
が前記従来の貫通孔のみをもつ吸音板材の場合よりも、
飛躍的に広くなり、かつその用途を拡大できる。According to the sound absorbing plate material of the present invention, it is possible to adapt to the sound wave frequency of the sound absorbing object by setting various ventilation hole lengths of the plurality of cylindrical portions without changing the thickness of the plate-shaped base portion. it can. Therefore, according to the sound absorbing plate material of the present invention, since a plurality of types of cylindrical portions having different ventilation hole lengths are formed on the plate-shaped base portion, the frequency band region of sound waves that can absorb sound is different from the conventional one. Compared with the case of sound absorbing plate material with only through holes,
It can be dramatically widened and its application can be expanded.
【００２８】前記複数種類の筒状部の通気孔長さの設定
に加えて、通気孔の内径の設定および分布ピッチの設定
を種々変化させることにより、前記吸音できる音波の周
波数帯領域をさらに広くすることができる。また、本発
明の吸音板材によれば、対向基材の壁面との間の限られ
た空気層の容積を増すことなく、広い範囲の周波数の音
波に適合して吸音し、減衰することができ、その設置ス
ペースが少なくて済む。In addition to setting the vent hole lengths of the plurality of types of tubular portions, the setting of the inner diameter of the vent holes and the setting of the distribution pitch are variously changed to further widen the frequency band region of the sound wave that can be absorbed. can do. Further, according to the sound absorbing plate material of the present invention, it is possible to absorb and attenuate sound by adapting to sound waves of a wide range of frequencies without increasing the volume of the limited air layer between the wall surface of the opposing base material. , Its installation space is small.
【００２９】さらに、本発明の吸音板材は、通気孔長さ
を異にする複数種類の筒状部を空気層を形成する板状の
基部の裏面側に突出させた場合には、筒状部を裏面側に
収容でき、かつ基部の表面の外観の見栄えが良い。Further, in the sound absorbing plate material of the present invention, when a plurality of types of tubular portions having different ventilation hole lengths are projected to the back side of the plate-like base portion forming the air layer, the tubular portion is formed. Can be accommodated on the back side, and the appearance of the surface of the base is good.
【図１】実施例１の吸音板材を断面す断面図。FIG. 1 is a cross-sectional view illustrating a cross section of a sound absorbing plate material according to a first embodiment.
【図２】実施例１の吸音板材における共鳴周波数に対す
る音源よりの音波の周波数と吸音効果（減衰率）との関
係を示し、かつ横軸に周波数（Ｈｚ）を示し、縦軸に減
衰率（％）を示す説明図。FIG. 2 shows the relationship between the frequency of sound waves from a sound source and the sound absorption effect (attenuation rate) with respect to the resonance frequency in the sound absorbing plate material of Example 1, the horizontal axis represents frequency (Hz), and the vertical axis represents the attenuation rate ( FIG.
【図３】実施例２の吸音板材を断面す断面図。FIG. 3 is a cross-sectional view showing a cross section of a sound absorbing plate material of Example 2.
【図４】実施例３の吸音板材を断面す断面図。FIG. 4 is a cross-sectional view of a sound absorbing plate material according to a third embodiment.
【図５】実施例４の吸音板材を断面す断面図。FIG. 5 is a cross-sectional view showing a cross section of a sound absorbing plate material of Example 4.
【図６】従来の吸音板材を断面す断面図。FIG. 6 is a sectional view of a conventional sound absorbing plate material.
【図７】従来の吸音板材における共鳴周波数に対する音
源よりの音波の周波数と吸音効果（減衰率）との関係を
示し、かつ横軸に周波数（Ｈｚ）を示し、縦軸に減衰率
（％）を示す説明図。FIG. 7 shows the relationship between the frequency of a sound wave from a sound source and the sound absorbing effect (attenuation rate) with respect to the resonance frequency in the conventional sound absorbing plate material, and the horizontal axis shows the frequency (Hz) and the vertical axis shows the attenuation rate (%). FIG.
１、１Ａ、１Ｂ、１Ｃ…吸音板材 ２、２ａ、２ｂ、
２ｃ…板状の基部 ３、４、５、６…筒状部 ３０、４０、５０、６０…
通気孔 ７…対向基材 ７０…壁面 ｅ１、ｅ２、ｅ３、ｅ４…空気の塊（マス） ｇ…空気層1, 1A, 1B, 1C ... Sound absorbing plate materials 2, 2a, 2b,
2c ... Plate-shaped base 3, 4, 5, 6 ... Cylindrical part 30, 40, 50, 60 ...
Ventilation hole 7 ... Opposing substrate 70 ... Wall surface e1, e2, e3, e4 ... Air mass (mass) g ... Air layer
Claims (1)
る吸音板材であり、板状の基部と該基部の少なくとも一
方の面に突出し、他方の面と連通する通気孔を形成する
長さの異なる複数種の筒状部とからなることを特徴とす
る吸音板材。1. A sound-absorbing plate material used to form an air layer on the back surface side, which has a plate-shaped base portion and a vent hole protruding from at least one surface of the base portion and communicating with the other surface. A sound-absorbing plate material comprising a plurality of types of tubular portions having different heights.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8006272A JPH09198052A (en) | 1996-01-18 | 1996-01-18 | Sound absorbing plate material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8006272A JPH09198052A (en) | 1996-01-18 | 1996-01-18 | Sound absorbing plate material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09198052A true JPH09198052A (en) | 1997-07-31 |
Family
ID=11633790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8006272A Pending JPH09198052A (en) | 1996-01-18 | 1996-01-18 | Sound absorbing plate material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09198052A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004037582A (en) * | 2002-06-28 | 2004-02-05 | Nippon Light Metal Co Ltd | Sound absorption structure |
| JP2009141349A (en) * | 2007-12-06 | 2009-06-25 | Asml Netherlands Bv | Lithographic apparatus having acoustic resonator |
| JP2010097146A (en) * | 2008-10-20 | 2010-04-30 | Yamaha Corp | Sound absorbing structure, sound absorbing structure group and acoustic room |
| JP2016200668A (en) * | 2015-04-08 | 2016-12-01 | 豊田合成株式会社 | Sound absorption resin structure |
-
1996
- 1996-01-18 JP JP8006272A patent/JPH09198052A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004037582A (en) * | 2002-06-28 | 2004-02-05 | Nippon Light Metal Co Ltd | Sound absorption structure |
| JP2009141349A (en) * | 2007-12-06 | 2009-06-25 | Asml Netherlands Bv | Lithographic apparatus having acoustic resonator |
| US8243258B2 (en) | 2007-12-06 | 2012-08-14 | Asml Netherlands B.V. | Lithographic apparatus having acoustic resonator |
| JP2010097146A (en) * | 2008-10-20 | 2010-04-30 | Yamaha Corp | Sound absorbing structure, sound absorbing structure group and acoustic room |
| JP2016200668A (en) * | 2015-04-08 | 2016-12-01 | 豊田合成株式会社 | Sound absorption resin structure |
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