JPH10183813A - Noise-absorbing structure for low frequency sound-range - Google Patents
Noise-absorbing structure for low frequency sound-rangeInfo
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- JPH10183813A JPH10183813A JP34792496A JP34792496A JPH10183813A JP H10183813 A JPH10183813 A JP H10183813A JP 34792496 A JP34792496 A JP 34792496A JP 34792496 A JP34792496 A JP 34792496A JP H10183813 A JPH10183813 A JP H10183813A
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- sound
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- low
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- absorbing
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、４００Ｈｚ以下の
低音域騒音の防音のための防音壁、防音筐体や、室内防
音工事材料等に使用される低音域騒音吸音構造に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound-absorbing structure used for a sound-insulating wall, a sound-proof housing, a sound-proofing material for indoor use, and the like, for soundproofing low-frequency sounds below 400 Hz.
【０００２】[0002]
【従来の技術】市民生活の近代化が進むにつれて各種騒
音の多発が問題となっており、音害防止のための対策が
種々講じられているが、色々な騒音のうち中音、高音域
の騒音が主な一般の道路などの騒音に関しては、吸音効
果が高いものが開発され、かつ、多用されている。一
方、低音域騒音については、防音構造が大がかりになる
こともあって、防音対策が比較的遅れているが、最近に
なって低音域騒音も大きな問題となってきている。例え
ば、変電所の変圧器から発生する低音域騒音や、構築物
の振動に伴って生じる低音域騒音なども音害として取り
上げられ、防音対策が急がれるようになってきている。2. Description of the Related Art As the modernization of civil life progresses, the occurrence of various noises has become a problem, and various measures have been taken to prevent sound pollution. Regarding the noise of general roads and the like that mainly generate noise, those having a high sound absorbing effect have been developed and are frequently used. On the other hand, with respect to low-pitched sound noise, the soundproofing structure may be large-scale, so that soundproofing measures have been relatively delayed, but recently low-pitched sound noise has also become a major problem. For example, low-range noise generated from transformers in substations and low-range noise generated due to vibrations of structures are taken up as sound damage, and soundproofing measures have been urgently taken.
【０００３】[0003]
【発明が解決しようとする課題】従来の低音域騒音吸音
構造としては、セラミック、金属などの多孔質吸音板、
グラスウール材、ロックウール材などの繊維状吸音材を
使用したものがある。セラミック多孔質吸音板あるいは
金属多孔質吸音板を単独で使用する場合は、低音域騒音
発生源に対向する壁面に、適当な空気層を背後に介在し
た状態で吸音板を張り付けたりしている。As a conventional low-noise sound absorbing structure, a porous sound-absorbing plate made of ceramic, metal or the like is used.
Some use a fibrous sound absorbing material such as glass wool material and rock wool material. When a ceramic porous sound absorbing plate or a metal porous sound absorbing plate is used alone, the sound absorbing plate is attached to a wall facing the low-frequency noise source with an appropriate air layer interposed behind.
【０００４】繊維状吸音材を単独で使用する場合は、低
音域騒音発生源に対向する壁面に適当な厚みの吸音材を
張り付けたり、あるいは繊維状吸音材の背後に適当な空
気層を設けて張り付けたりしている。When the fibrous sound absorbing material is used alone, a sound absorbing material having an appropriate thickness is attached to a wall facing the low-frequency sound source, or an appropriate air layer is provided behind the fibrous sound absorbing material. I'm sticking.
【０００５】また、多孔質吸音板と繊維状吸音材を組み
合わせて使用されることもあり、その場合は低音域騒音
発生源に対向する壁面に、多孔質吸音板を前面に配置
し、その背後に適当な厚みの繊維状吸音材を配置したり
している。In some cases, a porous sound-absorbing plate and a fibrous sound-absorbing material are used in combination. In such a case, the porous sound-absorbing plate is arranged on the front surface of the wall facing the low-frequency sound source, and Or a fibrous sound absorbing material having an appropriate thickness.
【０００６】このような吸音構造によれば、低音域騒音
に対してかなりの吸音効果は発揮されるが、十分な効果
を期そうとすると、多孔質吸音板の背後の空気層の厚み
を大きくしたり、使用する繊維状吸音材の厚みを増す必
要があって、コスト高になるのが問題であった。それで
も、１３０Ｈｚ以下の周波数の低音域に対する吸音特性
が大きく低下するのは避けられなかった。According to such a sound absorbing structure, a considerable sound absorbing effect is exhibited for low-range noise, but if a sufficient effect is expected, the thickness of the air layer behind the porous sound absorbing plate is increased. It is necessary to increase the thickness of the fibrous sound-absorbing material to be used and increase the cost. Nevertheless, it was unavoidable that the sound absorption characteristics in the low-frequency range below 130 Hz were greatly reduced.
【０００７】本発明は、このような問題点の解消を図る
ために成されたものであり、従って本発明の目的は、４
００Ｈｚ以下の殊に１３０Ｈｚ以下の低音域騒音に対す
る吸音特性に優れるとともに、簡易な構造に基づく低コ
スト化を実現することが可能な低音域騒音吸音構造を提
供することにある。[0007] The present invention has been made to solve such a problem.
An object of the present invention is to provide a low-range noise absorption structure that is excellent in sound absorption characteristics for low-range noise of 130 Hz or less, particularly 130 Hz or less, and that can realize low cost based on a simple structure.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記の目的を
達成するため以下に述べる構成としたものである。即
ち、本発明は、壁あるいは遮音板の低音域騒音発生源に
対向する面に沿い又は適宜の距離をおいて配設する板体
に形成される低音域騒音吸音構造であり、低音域騒音発
生源側となる前面側から、厚み３乃至１２mmの多孔質吸
音板、厚み３０乃至１００mmの繊維状吸音材、厚み３０
乃至１００mmの空気層及び厚み３０乃至１００mmの繊維
状吸音材が順に配置されてなり、４００Ｈｚ以下の低音
域騒音の吸音に優れた特性を示すことを特徴とする。The present invention has the following configuration to achieve the above object. That is, the present invention is a low-range noise absorption structure formed on a wall or a plate provided along a surface facing a low-range noise generation source of a sound insulating plate or at an appropriate distance from the low-range noise generation source. From the front side serving as the source side, a porous sound absorbing plate having a thickness of 3 to 12 mm, a fibrous sound absorbing material having a thickness of 30 to 100 mm, and a thickness of 30
An air layer having a thickness of 1 to 100 mm and a fibrous sound absorbing material having a thickness of 30 to 100 mm are sequentially arranged, and exhibit excellent characteristics of absorbing low-range noise of 400 Hz or less.
【０００９】本発明はまた、低音域騒音発生源と受音点
との間に立設する板体に形成される低音域騒音吸音構造
であり、低音域騒音発生源側となる前面側から、厚み３
乃至１２mmの多孔質吸音板、厚み３０乃至１００mmの繊
維状吸音材、厚み３０乃至１００mmの空気層及び厚み３
０乃至１００mmの繊維状吸音材並びに遮音板が順に配置
されてなり、４００Ｈｚ以下の低音域騒音の吸音に優れ
た特性を示すことを特徴とする。The present invention also provides a low-range noise-absorbing structure formed on a plate standing between a low-range noise generation source and a sound receiving point. Thickness 3
12 to 12 mm porous sound absorbing plate, 30 to 100 mm thick fibrous sound absorbing material, 30 to 100 mm thick air layer and 3
A fibrous sound-absorbing material of 0 to 100 mm and a sound-insulating plate are arranged in order, and exhibit excellent characteristics of absorbing low-frequency noise of 400 Hz or less.
【００１０】本発明はまた、前々項及び前項に記載の低
音域騒音吸音構造において、その多孔質吸音板が金属多
孔質吸音板で、かつ、縦弾性係数を２×１０9 Ｎ／ｍ2
以上とする板体であり、繊維状吸音材が、縦弾性係数を
２×１０4 Ｎ／ｍ2 以上とする板体であることを特徴と
する。According to the present invention, there is also provided a low-noise sound absorbing structure as described in the preceding paragraphs and the preceding paragraph, wherein the porous sound absorbing plate is a metal porous sound absorbing plate and has a longitudinal elastic modulus of 2 × 10 9 N / m 2.
The fibrous sound absorbing material is a plate having a longitudinal elastic modulus of 2 × 10 4 N / m 2 or more.
【００１１】本発明はまた、段落番号〔０００８〕〔０
００９〕及び〔００１０〕の項に記載の低音域騒音吸音
構造において、その繊維状吸音材が、厚み０．００５乃
至０．１００mmの樹脂フィルムによって被覆されてなる
ことを特徴とする。The present invention also relates to paragraph numbers [0008] [0
009] and [0010], wherein the fibrous sound absorbing material is covered with a resin film having a thickness of 0.005 to 0.100 mm.
【００１２】このような本発明低音域騒音吸音構造は、
４００Ｈｚ以下の殊に１３０Ｈｚ未満の周波数の騒音吸
収特性において優れており、これは多孔質吸音板と繊維
状吸音材とをそれぞれ単独で使用した場合の各吸音率を
合算した値より、高い吸音率を示していて、いわゆる相
乗効果のあることが判明された。この相乗効果の存在す
ることについて知見するに至った点に、本発明の特徴が
存在するものである。The low-noise sound absorption structure of the present invention has the following features.
It is excellent in noise absorption characteristics at a frequency of 400 Hz or less, especially at a frequency of less than 130 Hz, and has a higher sound absorption coefficient than the sum of the respective sound absorption coefficients when the porous sound absorbing plate and the fibrous sound absorbing material are used alone. It was found that there was a so-called synergistic effect. The feature of the present invention lies in the point at which it has been found that this synergistic effect exists.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態の各例
を図面に基づいて説明する。図１及び図２には、本発明
の第１及び第２の実施の形態に係る遮音パネルの構造が
断面図でそれぞれ示され、また、図３には、本発明の第
３の実施の形態に係る吸音壁体の構造が断面図で示され
る。Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show cross-sectional views of the structure of a sound insulation panel according to first and second embodiments of the present invention, respectively, and FIG. 3 shows a third embodiment of the present invention. Is shown in a cross-sectional view.
【００１４】上記各図において、共通する部材について
は同一の符号が付されており、１は金属多孔質吸音板等
の多孔質吸音板であって、例えば厚み：９mm、縦弾性係
数：２×１０9 Ｎ／ｍ2 以上の発泡アルミニウム吸音板
（登録商標名：アルポラス、神鋼鋼線工業株式会社製）
が使用される。２は繊維状吸音材であって、例えば、嵩
比重：３２kg/ ｍ2 、縦弾性係数：２×１０4 Ｎ／ｍ2
以上のグラスウール板材が使用される。３は空気層であ
って、パネル、壁体の内部に空間層として形成されてい
る。In the above drawings, common members are denoted by the same reference numerals, and 1 is a porous sound absorbing plate such as a metal porous sound absorbing plate, for example, having a thickness of 9 mm and a modulus of longitudinal elasticity of 2 ×. 10 9 N / m 2 or more foamed aluminum sound-absorbing plate (registered trade name: Alporus, manufactured by Shinko Wire Corp.)
Is used. Reference numeral 2 denotes a fibrous sound absorbing material, for example, bulk specific gravity: 32 kg / m 2 , modulus of longitudinal elasticity: 2 × 10 4 N / m 2
The above glass wool plate is used. Reference numeral 3 denotes an air layer, which is formed as a space layer inside the panel or the wall.
【００１５】図１図示の遮音パネルは、低音域騒音発生
源側となる前面側（図の右側）から、厚み：９mmの発泡
アルミニウム吸音板１、厚み（ｔ1 ）：５０mmのグラス
ウール板材２、厚み（ｔ2 ）：５０mmの空気層３及び厚
み（ｔ1 ）：５０mmのグラスウール板材２が順に配置さ
れて、さらに、背面板及び左右・上下側板として遮音板
４、例えば厚み：１．６mmの軟鋼板が配置されていて、
発泡アルミニウム吸音板１と遮音鋼板４とによって囲ま
れた全体が厚み：約１６０mmで剛性を有する遮音パネル
が形成される。The sound insulation panel shown in FIG. 1 is a foamed aluminum sound absorbing plate 1 having a thickness of 9 mm, a glass wool plate material 2 having a thickness (t 1) of 50 mm, and a thickness from the front side (the right side in the figure) which is a low-frequency noise source. (T2): an air layer 3 having a thickness of 50 mm and a glass wool plate 2 having a thickness (t1): 50 mm are arranged in order, and a sound insulating plate 4 as a back plate and left and right and upper and lower side plates, for example, a mild steel plate having a thickness of 1.6 mm. Are located,
A sound insulation panel having a thickness of about 160 mm and a rigidity as a whole surrounded by the foamed aluminum sound absorption plate 1 and the sound insulation steel plate 4 is formed.
【００１６】この遮音パネルは、騒音発生源とその周辺
の住宅等受音点との間の所定位置に、複数枚を縦横に継
ぎ合わせて立設することにより、低音域騒音を吸音し、
かつ、透過音を遮音鋼板４で遮断して防音する、いわゆ
る吸音・遮音壁体として用いられる。This sound insulation panel absorbs low-range noise by standing a plurality of sheets vertically and horizontally at a predetermined position between a noise source and a surrounding sound receiving point such as a house.
In addition, it is used as a so-called sound-absorbing / sound-insulating wall that blocks transmitted sound with the sound-insulating steel plate 4 to prevent sound.
【００１７】上記遮音パネルの残響室吸音特性が二つの
比較例と対照しながら図５に示されるが、図５におい
て、線Ａ1 は、図１に図示する第１の実施の形態に係る
遮音パネルについての低音周波数変化に対する吸音率
（％）の値を示したものであり、線Ｂ1 は、厚み：５０
mmのグラスウール板材、厚み：５０mmの空気層及び厚
み：５０mmのグラスウール板材が順に配置された構造の
第１比較例（遮音パネル）の同じく吸音率（％）変化を
示したものであり、線Ｃ1 は、厚み：９mmの発泡アルミ
ニウム吸音板と厚み：１５０mmの空気層が配置された第
２比較例（遮音パネル）の同じく吸音率（％）変化を示
したものである。一方、線Ｄ1 は、第１の実施の形態に
係る遮音パネルの吸音率（Ａ1 ：％）と、第１、第２両
比較例の吸音率の和（Ｂ1 ＋Ｃ1 ：％）との差を示した
ものである。FIG. 5 shows the reverberation room sound absorption characteristics of the above-mentioned sound insulation panel in comparison with two comparative examples. In FIG. 5, a line A1 is shown by a line in FIG. 1 according to the first embodiment. Shows the value of the sound absorption coefficient (%) with respect to the change in the bass frequency with respect to the line B1.
In the first comparative example (sound insulation panel) having a structure in which a glass wool plate having a thickness of 50 mm, an air layer having a thickness of 50 mm, and a glass wool plate having a thickness of 50 mm were sequentially arranged, the same sound absorption coefficient (%) change was shown. Shows the same sound absorption coefficient (%) change of the second comparative example (sound insulation panel) in which a foamed aluminum sound absorbing plate having a thickness of 9 mm and an air layer having a thickness of 150 mm are arranged. On the other hand, the line D1 shows the difference between the sound absorption coefficient (A1:%) of the sound insulating panel according to the first embodiment and the sum (B1 + C1:%) of the sound absorption coefficients of the first and second comparative examples. It is a thing.
【００１８】図５から明らかなように、第１の実施の形
態に係る遮音パネルは、約１３０Ｈｚ以下の周波数の低
音に対して、金属多孔質吸音板と空気層とから成る第２
比較例の吸音率（線Ｃ1 ）と繊維質吸音材と空気層とか
ら成る第１比較例の吸音率（線Ｂ1 ）とを加算した吸音
率よりも高い吸音率を有することを示している。つま
り、金属多孔質吸音板と繊維質吸音材を素材として本発
明の構造とすることにより、吸音効果に大きな相乗効果
が認められる。約１３０Ｈｚ以上の周波数ではこのよう
な効果は認められないものの、総合的に見て４００Ｈｚ
以下の低周波数で優れた吸音特性を示す。As can be seen from FIG. 5, the sound insulation panel according to the first embodiment has a second structure comprising a metal porous sound absorbing plate and an air layer for a low sound having a frequency of about 130 Hz or less.
It shows that the sound absorption coefficient is higher than the sum of the sound absorption coefficient (line C1) of the comparative example and the sound absorption coefficient (line B1) of the first comparative example composed of the fibrous sound absorbing material and the air layer. That is, by using the metal porous sound absorbing plate and the fibrous sound absorbing material as materials of the structure of the present invention, a large synergistic effect is recognized in the sound absorbing effect. At a frequency of about 130 Hz or more, such an effect is not recognized, but when viewed comprehensively at 400 Hz
It shows excellent sound absorption characteristics at the following low frequencies.
【００１９】なお、この吸音特性は、変電所などの変圧
器のような交流配電機器においては、励磁周波数の２〜
６倍の騒音（２倍が主となり、すなわち、関東では１０
０Ｈｚ、関西では１２０Ｈｚ）を発生するので、それら
を対象とする低周波域騒音用吸音構造として非常に優れ
た特性を備えていると言える。In the case of AC power distribution equipment such as a transformer in a substation, the sound absorption characteristic is set to a value between 2 and 3 of the excitation frequency.
6 times as much noise (2 times as much, ie 10 times in Kanto
0 Hz, and 120 Hz in Kansai), it can be said that it has very excellent characteristics as a low-frequency noise absorption structure for them.
【００２０】図２図示の第２の実施の形態に係る遮音パ
ネルは、図１に示される遮音パネルに対して、繊維質吸
音材（グラスウール板材）２を樹脂フィルム５で被覆し
た構成にその特徴を有していて、その他の構造について
は図１図示のものと同様である。この遮音パネルは、屋
外で使用する場合に雨水などで繊維質吸音材が含水する
と吸音特性が劣化するので、これを防止するためのもの
として好適な構造のパネルである。なお、樹脂フィルム
５としては厚み：０．００５乃至０．１００mmの薄いフ
ィルムが好ましく、例えば、厚み：０．０２１mmのポリ
フッ化ビニル等が使用可能である。The sound insulation panel according to the second embodiment shown in FIG. 2 is characterized in that the sound insulation panel shown in FIG. 1 is covered with a fibrous sound absorbing material (glass wool plate) 2 with a resin film 5. The other structure is the same as that shown in FIG. This sound insulation panel is a panel having a structure suitable for preventing the sound absorbing property from being deteriorated when the fibrous sound absorbing material is impregnated with rainwater or the like when used outdoors. The resin film 5 is preferably a thin film having a thickness of 0.005 to 0.100 mm, and for example, polyvinyl fluoride having a thickness of 0.021 mm can be used.
【００２１】この第２の実施の形態に係る遮音パネルの
残響室吸音特性が二つの比較例と対照しながら図６に示
される。線Ａ2 は、図２に図示する第２の実施の形態に
係る遮音パネルについての低音周波数変化に対する吸音
率（％）の値を示したものであり、線Ｂ2 は、厚み：
０．０２１mmの樹脂フィルムで被覆した厚み：５０mmの
グラスウール板材、厚み：５０mmの空気層及び厚み：
０．０２１mmの樹脂フィルムで被覆した厚み：５０mmの
グラスウール板材が順に配置された第１の比較例（遮音
パネル）の同じく吸音率（％）変化を示したものであ
る。また、線Ｃ1 は、図５において比較示したのと同じ
第２比較例（遮音パネル）の吸音率（％）変化を示した
ものである。一方、線Ｄ2 は、第２の実施の形態に係る
遮音パネルの吸音率（Ａ2 ：％）と、第１、第２両比較
例の吸音率の和（Ｂ2 ＋Ｃ1 ：％）との差を示したもの
である。FIG. 6 shows the reverberation room sound absorption characteristics of the sound insulation panel according to the second embodiment in contrast to the two comparative examples. The line A2 shows the value of the sound absorption coefficient (%) with respect to the change in the low frequency of the sound insulating panel according to the second embodiment shown in FIG. 2, and the line B2 shows the thickness:
Glass wool plate material with a thickness of 50 mm covered with a resin film of 0.021 mm, air layer with a thickness of 50 mm and thickness:
FIG. 9 shows the same change in sound absorption coefficient (%) of the first comparative example (sound insulation panel) in which glass wool plate materials having a thickness of 50 mm and covered with a resin film of 0.021 mm are sequentially arranged. A line C1 shows a change in the sound absorption coefficient (%) of the second comparative example (sound insulation panel) which is the same as the comparison shown in FIG. On the other hand, a line D2 shows a difference between the sound absorption coefficient (A2:%) of the sound insulation panel according to the second embodiment and the sum (B2 + C1:%) of the sound absorption coefficients of the first and second comparative examples. It is a thing.
【００２２】図６から明らかなように、第２の実施の形
態に係る遮音パネルは、図５図示の樹脂フィルムを有し
ない遮音パネルと比較して、残響室吸音特性に関し殆ど
変わらない程度の相乗効果を奏することが認められる。As is clear from FIG. 6, the sound insulation panel according to the second embodiment has a synergy that is almost unchanged with respect to the sound absorption characteristics of the reverberation room as compared with the sound insulation panel without the resin film shown in FIG. The effect is recognized.
【００２３】図３図示の本発明に係る第３の実施の形態
は、建物などの壁に適用した例の吸音壁体であって、建
物壁がコンクリート壁６等で、音波に対する十分な透過
損失を既に持つ構造の場合、第１、第２の実施の形態の
ように遮音板４は必要でないので、これを省略して吸音
作用を主として発揮し得るように、それぞれが適当厚み
を有する発泡アルミニウム吸音板１、グラスウール板材
２、空気層３及びグラスウール板材２を順に配置してな
る構造としたものであり、このような構造のものも残響
室吸音特性に関して、第１、第２の実施の形態と殆ど変
わらない相乗効果が認められる。The third embodiment according to the present invention shown in FIG. 3 is a sound-absorbing wall in which the present invention is applied to a wall of a building or the like. In the case of the structure already having the above, since the sound insulating plate 4 is not necessary as in the first and second embodiments, each of the foamed aluminum having an appropriate thickness is omitted so that the sound insulating plate 4 can be omitted and the sound absorbing effect can be mainly exerted. The sound absorbing plate 1, the glass wool plate 2, the air layer 3, and the glass wool plate 2 are arranged in this order. The structure having such a structure also relates to the reverberation room sound absorbing characteristics in the first and second embodiments. A synergistic effect that is almost the same as that shown is observed.
【００２４】図７及び図８には、本発明の第４及び第５
の実施の形態に係る遮音パネルの残響室吸音特性が示さ
れる。それらの両実施形態は、図１図示の第１の実施の
形態と基本的な構造を同じくするものであって、第４の
実施の形態の場合は、繊維状吸音材２及び空気層３の各
厚みが、特許請求の範囲の請求項１に記載の範囲内にお
ける下限値としての３０mmの例であり、第５の実施の形
態の場合は、同じく上限値としての１００mmの例であ
る。FIGS. 7 and 8 show the fourth and fifth embodiments of the present invention.
3 shows the reverberation room sound absorption characteristics of the sound insulation panel according to the embodiment. Both of these embodiments have the same basic structure as the first embodiment shown in FIG. 1, and in the case of the fourth embodiment, the fibrous sound absorbing material 2 and the air layer 3 Each thickness is an example of 30 mm as a lower limit within the range described in claim 1 of the claims, and the fifth embodiment is an example of 100 mm as an upper limit as well.
【００２５】図７において、線Ａ3 は、第４の実施の形
態に係る遮音パネルについての低音周波数変化に対する
吸音率（％）の値を示したものであり、線Ｂ3 は、厚
み：３０mmのグラスウール板材、厚み：３０mmの空気層
及び厚み：３０mmのグラスウール板材が順に配置された
第１比較例（遮音パネル）の同じく吸音率（％）変化を
示したものであり、線Ｃ3 は、厚み：９mmの発泡アルミ
ニウム吸音板と厚み：９０mmの空気層が配置された第２
比較例（遮音パネル）の同じく吸音率（％）変化を示し
たものである。一方、線Ｄ3 は、第４の実施の形態に係
る遮音パネルの吸音率（Ａ3 ：％）と、第１、第２両比
較例の吸音率の和（Ｂ3 ＋Ｃ3 ：％）との差を示したも
のである。In FIG. 7, line A3 shows the value of the sound absorption coefficient (%) with respect to the change in the low frequency of the sound insulating panel according to the fourth embodiment, and line B3 is the glass wool having a thickness of 30 mm. In the first comparative example (sound insulation panel) in which a plate material, an air layer having a thickness of 30 mm, and a glass wool plate material having a thickness of 30 mm are sequentially arranged, the same sound absorption coefficient (%) change is shown. 2nd in which the foamed aluminum sound-absorbing plate and the air layer of thickness: 90 mm are arranged
It is the same as that of the comparative example (sound insulation panel) showing the sound absorption coefficient (%) change. On the other hand, a line D3 indicates a difference between the sound absorption coefficient (A3:%) of the sound insulation panel according to the fourth embodiment and the sum (B3 + C3:%) of the sound absorption coefficients of the first and second comparative examples. It is a thing.
【００２６】図８において、線Ａ4 は、第５の実施の形
態に係る遮音パネルについての低音周波数変化に対する
吸音率（％）の値を示したものであり、線Ｂ4 は、厚
み：１００mmのグラスウール板材、厚み：１００mmの空
気層及び厚み：１００mmのグラスウール板材が順に配置
された第１比較例（遮音パネル）の同じく吸音率（％）
変化を示したものであり、線Ｃ4 は、厚み：９mmの発泡
アルミニウム吸音板と厚み：３００mmの空気層が配置さ
れた第２比較例（遮音パネル）の同じく吸音率（％）変
化を示したものである。一方、線Ｄ4 は、第４の実施の
形態に係る遮音パネルの吸音率（Ａ3 ：％）と、第１、
第２両比較例の吸音率の和（Ｂ3 ＋Ｃ3 ：％）との差を
示したものである。In FIG. 8, a line A4 shows the value of the sound absorption coefficient (%) with respect to the change in the low frequency of the sound insulating panel according to the fifth embodiment, and a line B4 shows the glass wool having a thickness of 100 mm. The same sound absorption coefficient (%) of the first comparative example (sound insulation panel) in which a plate material, an air layer having a thickness of 100 mm, and a glass wool plate material having a thickness of 100 mm are sequentially arranged.
The line C4 shows the same change in the sound absorption coefficient (%) of the second comparative example (sound insulation panel) in which a foamed aluminum sound absorbing plate having a thickness of 9 mm and an air layer having a thickness of 300 mm are arranged. Things. On the other hand, the line D4 represents the sound absorption coefficient (A3:%) of the sound insulation panel according to the fourth embodiment,
The difference from the sum of the sound absorption coefficients (B3 + C3:%) of both the second comparative examples is shown.
【００２７】本発明に係る上記両例においても、約１３
０Ｈｚ以下の周波数の低音に対して、金属多孔質吸音板
と空気層とから成る各第２比較例の吸音率（線Ｃ3 、Ｃ
4 ）と繊維質吸音材と空気層とから成る各第１比較例の
吸音率（線Ｂ3 、Ｂ4 ）とを加算した吸音率よりも高い
吸音率を有することを示している。つまり、金属多孔質
吸音板と繊維質吸音材を素材として例示の構造とするこ
とにより、吸音効果に大きな相乗効果が認められ、総合
的に見て４００Ｈｚ以下の低周波数で優れた吸音特性を
示している。In both of the above examples according to the present invention, about 13
With respect to the low frequency of 0 Hz or less, the sound absorption coefficient (lines C3 and C3) of each of the second comparative examples including the metal porous sound absorbing plate and the air layer.
4) and the sound absorption coefficient (lines B3 and B4) of each of the first comparative examples composed of the fibrous sound absorbing material and the air layer. In other words, a large synergistic effect is recognized in the sound absorbing effect by using the metal porous sound absorbing plate and the fibrous sound absorbing material as an example of a structure, and excellent sound absorbing characteristics are exhibited at a low frequency of 400 Hz or less as a whole. ing.
【００２８】以上述べたように、本発明によれば、その
吸音効果が４００Ｈｚ以下の低音域騒音に対して従来の
もより優れている。特に、多孔質吸音板と繊維質吸音材
とを単独で使用したときのそれぞれの効果を加算したも
のよりも大きく、ある音域では相乗効果が認められる。
なお、本発明に係る吸音構造の全体の厚みに関しては、
低音域では吸音体の厚みが厚い程吸音効果は大きくなる
が、３００mmを超えるとそれほど向上が見られないこと
が実験の結果から明らかであるところから、繊維質吸音
材及び空気層の各厚みを１００mmとした。As described above, according to the present invention, the sound absorbing effect is superior to the conventional one for low-range noise of 400 Hz or less. In particular, it is larger than the sum of the respective effects when the porous sound absorbing plate and the fibrous sound absorbing material are used alone, and a synergistic effect is recognized in a certain sound range.
In addition, regarding the overall thickness of the sound absorbing structure according to the present invention,
In the low-frequency range, the sound absorbing effect increases as the thickness of the sound absorber increases.However, it is clear from the results of the experiments that the sound absorbing effect is not so improved when the thickness exceeds 300 mm. It was 100 mm.
【００２９】本発明に係る多孔質吸音板に関しては、厚
みが厚い程低音域での吸音特性が向上するが、その効果
は１２mmを超えると顕著でなくなり、また製造コストも
厚いほど増加することから製品としての経済性に問題が
ある。一方、３mmよりも薄くなると中高音域の吸音特性
は向上するものの低音域の吸音特性が大幅に低下するこ
とから、その厚みを３乃至１２mmの範囲に定めた。With respect to the porous sound-absorbing plate of the present invention, as the thickness increases, the sound absorbing characteristics in the low-frequency range improve. However, the effect is not significant when the thickness exceeds 12 mm, and the effect increases as the manufacturing cost increases. There is a problem in economics as a product. On the other hand, when the thickness is smaller than 3 mm, the sound absorption characteristics in the middle and high ranges are improved, but the sound absorption characteristics in the low range are greatly reduced. Therefore, the thickness is set in the range of 3 to 12 mm.
【００３０】また、繊維状吸音材に被覆させる樹脂フィ
ルムについては、厚み０．００５mm以下では、物理的に
弱くなり破損し易いので、現実的でないこと、厚み０．
１００mm以上では低音が樹脂フィルムを透過し難くなっ
て繊維状吸音材の吸音効果をマスクすること、低音域は
比較的透過し易いが４００Ｈｚ以下の低音域を対象とし
ていること等を考慮した結果、フィルムの厚みを０．０
０５乃至０．１００mmの範囲に定めたのである。When the resin film to be coated on the fibrous sound absorbing material has a thickness of 0.005 mm or less, it is physically weak and easily broken.
At 100 mm or more, the bass becomes difficult to penetrate through the resin film, masking the sound absorbing effect of the fibrous sound absorbing material, and the result of considering that the bass range is relatively easy to transmit but targets the bass range of 400 Hz or less, Set the film thickness to 0.0
It was set in the range of 05 to 0.100 mm.
【００３１】[0031]
【実施例】以下、本発明の実施例について添付図面を参
照しながら説明する。図４に本発明の実施例に係る遮音
パネルの例が示されるが、この実施例は図２図示の第２
の実施の形態における構成を基本的構成とするものであ
って、すなわち、本体部は、低音域騒音発生源側となる
前面側（正面側）から、厚み：９mmの発泡アルミニウム
吸音板１、厚み：０．０２１mmのポリフッ化ビニルによ
って被覆された厚み：５０mmのグラスウール板材２、厚
み：５０mmの空気層３及び厚み：０．０２１mmのポリフ
ッ化ビニルによって被覆された厚み：５０mmのグラスウ
ール板材２を順に配置して、さらに、背面板として例え
ば厚み：１．６mmのフッ素樹脂ラミネート鋼板から成る
遮音板４を配置して、積層体から成る騒音吸音構造に形
成する。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 4 shows an example of a sound insulation panel according to an embodiment of the present invention.
In other words, the main body is a foamed aluminum sound-absorbing plate 1 having a thickness of 9 mm from the front side (front side) serving as a low-range noise generation source side. : A glass wool plate 2 having a thickness of 50 mm covered with 0.021 mm of polyvinyl fluoride, an air space 3 having a thickness of 50 mm, and a glass wool plate 2 having a thickness of 50 mm covered with 0.021 mm of polyvinyl fluoride Then, a sound insulating plate 4 made of a fluororesin laminated steel plate having a thickness of, for example, 1.6 mm is arranged as a back plate to form a noise absorbing structure made of a laminated body.
【００３２】この本体部の上下・左右の四側面に、溶融
亜鉛めっきが施された形鋼から成る側板７を当て合わせ
ると共に、前面側の四周縁部及び幅方向中心部には補強
用枠材としてのアルミ形材８を添設し、更に、背面側の
左右縦縁部にはネオプレンゴムから成る緩衝材９を貼り
付ける。このようにして、例えば厚みが１６５mm、縦寸
法が６２０mm、幅寸法が２０５０mmの剛構造の遮音・吸
音パネルが構成され、このパネルを左右方向に、また上
下方向に継ぎ合わせて、低音域騒音発生源と受音点との
間の適当個所に立設させることによって、所望の面積を
持つ遮音・吸音壁体の設置が可能であり、４００Ｈｚ以
下の低音騒音を有効に防音・遮音することができる。A side plate 7 made of shaped steel coated with hot-dip galvanized steel is applied to the four sides of the main body in the upper, lower, left and right directions, and a reinforcing frame member is provided on the four peripheral edges and the center in the width direction on the front side. And a cushioning material 9 made of neoprene rubber is adhered to the left and right vertical edges on the back side. In this way, for example, a rigid sound insulation / sound absorption panel having a thickness of 165 mm, a vertical dimension of 620 mm, and a width of 2050 mm is formed. By standing up at an appropriate place between the source and the sound receiving point, it is possible to install a sound-insulating / sound-absorbing wall having a desired area, and it is possible to effectively prevent and suppress low-frequency noise of 400 Hz or less. .
【００３３】[0033]
【発明の効果】本発明は、以上説明したような形態で実
施され、以下に記載されるような効果を奏する。The present invention is embodied in the form described above and has the following effects.
【００３４】本発明は、４００Ｈｚ以下の殊に１３０Ｈ
ｚ未満の周波数の騒音吸収特性において優れており、こ
れは金属多孔質吸音板と繊維状吸音材とをそれぞれ単独
で使用した場合の各吸音率を合算した値より、高い吸音
率を示していて、いわゆる相乗効果のある優れた特性が
発揮される。殊に、変電所などの変圧器のような交流配
電機器においては、励磁周波数の２〜６倍の騒音（２倍
が主となり、すなわち、関東では１００Ｈｚ、関西では
１２０Ｈｚ）を発生するので、それらを対象とする低周
波用吸音構造として好適なものと言える。The present invention is intended to operate at a frequency of
It is excellent in the noise absorption characteristic of the frequency less than z, which shows a higher sound absorption coefficient than the sum of the respective sound absorption coefficients when the metal porous sound absorbing plate and the fibrous sound absorbing material are used alone. Thus, excellent characteristics having a so-called synergistic effect are exhibited. In particular, in AC power distribution equipment such as transformers such as substations, noise of 2 to 6 times the excitation frequency (mainly twice as much, ie, 100 Hz in Kanto and 120 Hz in Kansai) is generated. It can be said that this is suitable as a low-frequency sound absorbing structure for the object.
【図１】本発明の第１の実施の形態に係る遮音パネルの
断面示構造図である。FIG. 1 is a structural view showing a cross section of a sound insulation panel according to a first embodiment of the present invention.
【図２】本発明の第２の実施の形態に係る遮音パネルの
断面示構造図である。FIG. 2 is a cross-sectional structural view of a sound insulation panel according to a second embodiment of the present invention.
【図３】本発明の第３の実施の形態に係る吸音壁体の一
部省略・断面示構造図である。FIG. 3 is a partially omitted and cross-sectional structural view of a sound absorbing wall according to a third embodiment of the present invention.
【図４】本発明の実施例に係る遮音パネルの外観図で、
（イ）は前面側斜視図、（ロ）は背面側斜視図である。FIG. 4 is an external view of a sound insulation panel according to an embodiment of the present invention.
(A) is a front perspective view, and (B) is a rear perspective view.
【図５】図１の第１の実施の形態に係る遮音パネルの残
響室吸音特性を比較例と対照して示す線図である。FIG. 5 is a diagram showing a reverberation room sound absorption characteristic of the sound insulation panel according to the first embodiment of FIG. 1 in comparison with a comparative example.
【図６】図２の第２の実施の形態に係る遮音パネルの残
響室吸音特性を比較例と対照して示す線図である。FIG. 6 is a diagram showing a reverberation room sound absorption characteristic of the sound insulation panel according to the second embodiment of FIG. 2 in comparison with a comparative example.
【図７】本発明の第４の実施の形態に係る遮音パネルの
残響室吸音特性を比較例と対照して示す線図である。FIG. 7 is a diagram showing a reverberation room sound absorption characteristic of a sound insulating panel according to a fourth embodiment of the present invention in comparison with a comparative example.
【図８】本発明の第５の実施の形態に係る遮音パネルの
残響室吸音特性を比較例と対照して示す線図である。FIG. 8 is a diagram showing a reverberation room sound absorption characteristic of a sound insulating panel according to a fifth embodiment of the present invention in comparison with a comparative example.
１…金属多孔質吸音板、 ２…繊維状吸音
材、３…空気層、 ４…遮音板、
５…樹脂フィルム、 ６…コンクリート
壁、DESCRIPTION OF SYMBOLS 1 ... Porous metal sound absorbing plate, 2 ... Fibrous sound absorbing material, 3 ... Air layer, 4 ... Sound insulating plate,
5 ... Resin film, 6 ... Concrete wall,
フロントページの続き (72)発明者 山口 昭一 尼崎市中浜町10番地１ 神鋼鋼線工業株式 会社内Continued on the front page (72) Inventor Shoichi Yamaguchi 10-1 Nakahamacho, Amagasaki City Shinko Steel Wire Industry Co., Ltd.
Claims (4)
対向する面に沿い又は適宜の距離をおいて配設する板体
に形成される低音域騒音吸音構造であり、低音域騒音発
生源側となる前面側から、厚み３乃至１２mmの多孔質吸
音板、厚み３０乃至１００mmの繊維状吸音材、厚み３０
乃至１００mmの空気層及び厚み３０乃至１００mmの繊維
状吸音材が順に配置されてなり、４００Ｈｚ以下の低音
域騒音の吸音に優れた特性を示すことを特徴とする低音
域騒音吸音構造。1. A low-range noise absorption structure formed on a plate provided along a surface of a wall or a sound insulation plate facing a low-range noise generation source or at an appropriate distance from the low-range noise generation source. 3 to 12 mm thick porous sound absorbing plate, 30 to 100 mm thick fibrous sound absorbing material, thickness 30
A low-range sound absorption structure characterized by comprising an air layer having a thickness of 1 to 100 mm and a fibrous sound-absorbing material having a thickness of 30 to 100 mm arranged in order, and exhibiting excellent characteristics of absorbing low-range noise of 400 Hz or less.
する板体に形成される低音域騒音吸音構造であり、低音
域騒音発生源側となる前面側から、厚み３乃至１２mmの
多孔質吸音板、厚み３０乃至１００mmの繊維状吸音材、
厚み３０乃至１００mmの空気層及び厚み３０乃至１００
mmの繊維状吸音材並びに遮音板が順に配置されてなり、
４００Ｈｚ以下の低音域騒音の吸音に優れた特性を示す
ことを特徴とする低音域騒音吸音構造。2. A low-range noise absorption structure formed on a plate standing between a low-range noise generation source and a sound receiving point, and having a thickness of 3 to 3 mm from the front side serving as the low-range noise generation source side. 12 mm porous sound absorbing plate, 30 to 100 mm thick fibrous sound absorbing material,
Air layer with thickness of 30 to 100 mm and thickness of 30 to 100
mm fibrous sound absorbing material and sound insulation plate are arranged in order,
A low-range sound absorption structure characterized by exhibiting excellent characteristics of absorbing low-range noise of 400 Hz or less.
つ、縦弾性係数を２×１０9 Ｎ／ｍ2 以上とする板体で
あり、繊維状吸音材が、縦弾性係数を２×１０4 Ｎ／ｍ
2 以上とする板体である請求項１又は請求項２に記載の
低音域騒音吸音構造。3. The porous sound-absorbing plate is a metal porous sound-absorbing plate and a plate having a longitudinal elastic coefficient of 2 × 10 9 N / m 2 or more, and the fibrous sound absorbing material has a longitudinal elastic coefficient of 2 × 10 9 N / m 2 or more. × 10 4 N / m
The low-range sound absorption structure according to claim 1 or 2 , wherein the plate has two or more plates.
０．１００mmの樹脂フィルムによって被覆されてなる請
求項１、請求項２又は請求項３に記載の低音域騒音吸音
構造。4. The low-noise sound absorption structure according to claim 1, wherein the fibrous sound-absorbing material is covered with a resin film having a thickness of 0.005 to 0.100 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34792496A JP3652828B2 (en) | 1996-12-26 | 1996-12-26 | Low-frequency noise absorption structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34792496A JP3652828B2 (en) | 1996-12-26 | 1996-12-26 | Low-frequency noise absorption structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10183813A true JPH10183813A (en) | 1998-07-14 |
| JP3652828B2 JP3652828B2 (en) | 2005-05-25 |
Family
ID=18393542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34792496A Expired - Lifetime JP3652828B2 (en) | 1996-12-26 | 1996-12-26 | Low-frequency noise absorption structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3652828B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004037582A (en) * | 2002-06-28 | 2004-02-05 | Nippon Light Metal Co Ltd | Sound absorption structure |
| JP2006199276A (en) * | 2004-12-24 | 2006-08-03 | Kobe Steel Ltd | Sound absorbing structure |
| JP2007120143A (en) * | 2005-10-28 | 2007-05-17 | Asahi Steel Industry | Sound insulation fence |
| KR100823534B1 (en) | 2006-06-01 | 2008-04-21 | 곽종기 | Pokso-booth to roar with laughter |
| JP2013064289A (en) * | 2011-09-20 | 2013-04-11 | Sekisui Chem Co Ltd | Soundproof structure of building and building |
| CN104005495A (en) * | 2014-04-22 | 2014-08-27 | 四川正升声学科技有限公司 | Assembling type bridge-cutoff sound absorbing and isolating wall body |
| JP2015016844A (en) * | 2013-07-15 | 2015-01-29 | 日本車輌製造株式会社 | Interior structure of railway vehicle |
| CN109812125A (en) * | 2019-02-28 | 2019-05-28 | 广东腾越建筑工程有限公司 | A kind of detachable, structurally stable sound absorption-type construction baffle |
-
1996
- 1996-12-26 JP JP34792496A patent/JP3652828B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004037582A (en) * | 2002-06-28 | 2004-02-05 | Nippon Light Metal Co Ltd | Sound absorption structure |
| JP2006199276A (en) * | 2004-12-24 | 2006-08-03 | Kobe Steel Ltd | Sound absorbing structure |
| JP2007120143A (en) * | 2005-10-28 | 2007-05-17 | Asahi Steel Industry | Sound insulation fence |
| JP4587393B2 (en) * | 2005-10-28 | 2010-11-24 | 朝日スチール工業株式会社 | Sound insulation fuence |
| KR100823534B1 (en) | 2006-06-01 | 2008-04-21 | 곽종기 | Pokso-booth to roar with laughter |
| JP2013064289A (en) * | 2011-09-20 | 2013-04-11 | Sekisui Chem Co Ltd | Soundproof structure of building and building |
| JP2015016844A (en) * | 2013-07-15 | 2015-01-29 | 日本車輌製造株式会社 | Interior structure of railway vehicle |
| CN104005495A (en) * | 2014-04-22 | 2014-08-27 | 四川正升声学科技有限公司 | Assembling type bridge-cutoff sound absorbing and isolating wall body |
| CN109812125A (en) * | 2019-02-28 | 2019-05-28 | 广东腾越建筑工程有限公司 | A kind of detachable, structurally stable sound absorption-type construction baffle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3652828B2 (en) | 2005-05-25 |
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