JPH054675B2 - - Google Patents
Info
- Publication number
- JPH054675B2 JPH054675B2 JP61100480A JP10048086A JPH054675B2 JP H054675 B2 JPH054675 B2 JP H054675B2 JP 61100480 A JP61100480 A JP 61100480A JP 10048086 A JP10048086 A JP 10048086A JP H054675 B2 JPH054675 B2 JP H054675B2
- Authority
- JP
- Japan
- Prior art keywords
- sound absorbing
- sound
- sound absorption
- veneer
- thickness
- 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.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 40
- 239000011358 absorbing material Substances 0.000 claims description 16
- 239000006260 foam Substances 0.000 claims description 13
- 239000002344 surface layer Substances 0.000 claims description 11
- 239000010410 layer Substances 0.000 claims description 9
- 239000012792 core layer Substances 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 description 33
- 239000002023 wood Substances 0.000 description 9
- 229920003002 synthetic resin Polymers 0.000 description 8
- 239000000057 synthetic resin Substances 0.000 description 8
- 239000011491 glass wool Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 241000218657 Picea Species 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 felt Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、吸音板に関し、木質単板からなる
表面層と吸音材からなる芯層との間に音響的に半
透過性の中間材からなる中間制御層を介挿するこ
とにより、美麗な外観を呈し、良好な吸音性能を
持ち、しかも中高音域の吸音特性を任意に制御で
きるようにしたものである。[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a sound-absorbing board, and the present invention relates to a sound-absorbing board, in which an acoustically semi-transparent intermediate material is formed between a surface layer made of a wooden veneer and a core layer made of a sound-absorbing material. By inserting an intermediate control layer, it has a beautiful appearance, good sound absorption performance, and the ability to arbitrarily control the sound absorption characteristics in the middle and high frequency range.
音響スタジオなどの壁や天井に貼設される吸音
板としては、従来グラスウールやロツクウールな
どの多孔性の板状吸音材を化粧クロスで包み込ん
だものやパンチングメタル、リブ等で表面保護し
たものが使用されている。
Sound-absorbing boards attached to walls and ceilings in sound studios have traditionally been made of porous plate sound-absorbing materials such as glass wool or rock wool wrapped in decorative cloth, or surfaces protected with punched metal, ribs, etc. has been done.
しかしながら、このような吸音板にあつては、
吸音性能はほぼ満足されるものの、表面の質感に
欠け、外観意匠性が制限される点で不満が残る。
また、一般的なクロス仕上げの場合には表面の剛
性が不足し、施工作業性等に劣る問題もある。さ
らに、吸音特性が吸音材のそれによつて決定され
てしまい、吸音特性を任意に変化させることがで
きなかつた。すなわち、吸音材に多用されるグラ
スウールなどは、一般に中高音域での吸音率が大
きいという特徴を有する。一方、室内には通常カ
ーテンなどの潜在的な中高音吸音要素が多く存在
する。このため、グラスウールと化粧クロスから
なる吸音板では、このような室内に用いた場合中
高音域が過剰吸音となるきらいがあつた。したが
つて、室内の音響条件によつては、中高音域の吸
音特性を任意に変化させる必要があるためであ
る。
However, in the case of such sound absorbing boards,
Although the sound absorption performance is mostly satisfied, there are still some dissatisfaction with the lack of surface texture and limited appearance design.
Further, in the case of a general cloth finish, there is a problem that the surface rigidity is insufficient, resulting in poor construction workability. Furthermore, the sound absorption properties are determined by those of the sound absorption material, and the sound absorption properties cannot be changed arbitrarily. That is, glass wool, which is often used as a sound absorbing material, generally has a characteristic of having a high sound absorption coefficient in the middle and high frequency range. On the other hand, there are usually many latent mid- and high-frequency sound absorbing elements such as curtains in a room. For this reason, when a sound absorbing board made of glass wool and decorative cloth is used in such a room, it tends to absorb excessive sound in the middle and high frequency ranges. Therefore, depending on the acoustic conditions in the room, it is necessary to arbitrarily change the sound absorption characteristics in the middle and high frequency range.
そこで、この発明の吸音板は、木質単板からな
る表面層と吸音材からなる芯層との間に音響的に
半透過性の中間材からなる中間制御層を介挿する
ことにより上記問題点を解決するようにしたもの
である。
Therefore, the sound absorbing board of the present invention solves the above problems by interposing an intermediate control layer made of an acoustically semi-transparent intermediate material between the surface layer made of a wooden veneer and the core layer made of a sound absorbing material. It was designed to solve the problem.
この発明の吸音板は、木質単板からなる表面層
が設けられているので美麗な外観を呈する。ま
た、中間制御層に音響特性の異なる材料を選択す
ることにより、中高音域での吸音特性を任意に変
化させることができる。
The sound absorbing board of the present invention has a beautiful appearance because it is provided with a surface layer made of a wooden veneer. Furthermore, by selecting materials with different acoustic properties for the intermediate control layer, the sound absorption properties in the mid-to-high range can be changed arbitrarily.
第１図は、この発明の吸音板の一例を示すもの
で、図中符号１は基板である。この基板１は、こ
の実施例ではパーチクルボード、ラワン合板など
の台板２と、この台板２の一側面に必要に応じて
裏打ち３を介して貼着された木質単板４とから構
成されている。木質単板４はこの吸音板の裏面材
となるものであつて、厚さ0.2〜0.4mm程度のロー
タリー単板やスライス単板などが用いられ、これ
を補強するために合成繊維製不織布や和紙などか
らなる裏打ち材８で裏打ちされたうえ台板２に貼
着されている。木質単板４と裏打ち材３および裏
打ち材３と台板２とは、酢酸ビニル系エマルジヨ
ン接着材などの接着材で接着されている。
FIG. 1 shows an example of a sound absorbing plate according to the present invention, and reference numeral 1 in the figure indicates a substrate. In this embodiment, the substrate 1 is composed of a base plate 2 made of particle board, lauan plywood, etc., and a wooden veneer 4 attached to one side of the base plate 2 via a lining 3 if necessary. There is. The wood veneer 4 is the backing material of this sound absorbing board, and is made of rotary veneer or sliced veneer with a thickness of about 0.2 to 0.4 mm, and is reinforced with synthetic fiber non-woven fabric or Japanese paper. The base plate 2 is lined with a backing material 8 made of a material such as the like, and is attached to the base plate 2. The wooden veneer 4 and the backing material 3 and the backing material 3 and the base plate 2 are bonded together using an adhesive such as a vinyl acetate emulsion adhesive.
また、台板２の他側には、枠体５が取り付けら
れている。この枠体５は、台板２の外周寸法と同
一の外周寸法を有する四角形の枠であつて、通常
スプルースなどの木材などで作製されており、接
着、釘止めなどの固定手段によつて台板２に強固
に固着されている。また、この枠体５は、後述の
ように吸音材を収容する空間を形成するものでも
あるので、枠体５の吸音板の厚み方向の寸法は、
収容する吸音材の厚みとほぼ同一となるように決
められることが多いが、これに限られることもな
い。 Further, a frame body 5 is attached to the other side of the base plate 2. This frame body 5 is a rectangular frame having the same outer circumference as the outer circumference of the base plate 2, and is usually made of wood such as spruce. It is firmly fixed to the plate 2. Moreover, since this frame 5 also forms a space for accommodating a sound absorbing material as described later, the dimension of the sound absorbing plate of the frame 5 in the thickness direction is as follows.
Although the thickness is often determined to be approximately the same as the thickness of the sound absorbing material to be accommodated, it is not limited to this.
そして、枠体５と台板２とで形成された四角状
の空間には、グラスウール、ロツクウール、フエ
ルト、樹脂フオームなどの芯層となる多孔質吸音
材６が軽く充填、収容されている。この吸音材６
の厚みは、吸音板として要求される吸音性に応じ
た厚みとされ、通常25mm、50mm、75mmなどの品種
が選ばれる。また、吸音材６の比重（嵩比重）も
吸音性に関係するので、同様に要求吸音性能に合
致するようなものが選ばれる。 The rectangular space formed by the frame body 5 and the base plate 2 is lightly filled with and housed in a porous sound absorbing material 6 serving as a core layer, such as glass wool, rock wool, felt, or resin foam. This sound absorbing material 6
The thickness of the board is determined according to the sound absorption properties required for the sound absorption board, and varieties such as 25mm, 50mm, and 75mm are usually selected. Further, since the specific gravity (bulk specific gravity) of the sound absorbing material 6 is also related to the sound absorbing property, a material that similarly matches the required sound absorbing performance is selected.
また、この吸音材６を押え込むようにして表面
層となる木質単板７と中間制御層となる中間材８
とが一体に接合された表面剛材９が枠体５に取り
付けられている。木質単板７は、厚さ0.2〜0.4mm
程度のロータリ単板やスライス単板が用いられ、
台板２に貼着されたものと同一樹脂のものを用い
るのが好ましい。この木質単板７は、多数の導管
等の細孔を有し、かつ厚さがこのように薄いた
め、音響的には吸音性をほとんど示さず、音響透
過性である。また、中間材８は音響的には半透過
性の材料であつて、具体的には厚さ２〜５mm程度
のポリビニルホルマール発泡体などの連続気泡構
造合成樹脂発泡体、坪量20〜50ｇ／m2程度の不織
布、厚さ１〜５mm程度の発泡アルミナシリケート
などのセラミツク発泡体、厚さ１〜５mm程度のア
ルミニウム焼結パネル材、アルミニウムなどのパ
ンチングメタル板、厚さ0.1〜0.2mm程度の合成樹
脂膜、厚さ１〜５mm程度の合成樹脂含浸紙などが
適宜選択される。このような中間材８は、特にそ
の通気性や厚みによつてその音響特性が左右さ
れ、通気性が大きいもの程、音響的に透明であ
り、吸音板全体としての吸音特性を変化させる度
合が小さくなる。この中間材８は、上述のように
木質単板７と一体化されて表面剛性材９となつて
おり、中間材８が合成樹脂発泡体の場合は発泡処
理段階において木質単板７と接着一体化するかあ
るいはシート状の発泡体を接着剤で接着すること
により一体化する。また、中間材８が不織布、セ
ラミツク発泡体、パンチングメタル板などのとき
は網状のホツトメルト型接着剤などを用いて接着
一体化する。さらに、合成樹脂膜では、木質単板
に直接塗料などの合成樹脂液を塗布する。合成樹
脂含浸紙では、この含浸紙を木質単板に熱圧処理
して貼着して一体化する。 In addition, by pressing down this sound absorbing material 6, a wooden veneer 7 which becomes a surface layer and an intermediate material 8 which becomes an intermediate control layer are added.
A surface rigid material 9 is attached to the frame 5 and is integrally joined to the surface rigid material 9. The wood veneer 7 has a thickness of 0.2 to 0.4 mm.
Rotary veneer and sliced veneer are used,
It is preferable to use the same resin as that attached to the base plate 2. This wooden veneer 7 has many pores such as conduits and is thin in thickness, so it exhibits almost no sound absorbing property and is acoustically transparent. The intermediate material 8 is an acoustically semi-transparent material, specifically an open-cell synthetic resin foam such as polyvinyl formal foam with a thickness of about 2 to 5 mm, and a basis weight of 20 to 50 g/ non-woven fabric of about m 2 , ceramic foam such as foamed alumina silicate about 1 to 5 mm thick, aluminum sintered panel material of about 1 to 5 mm thick, punched metal plate of aluminum etc., about 0.1 to 0.2 mm thick A synthetic resin film, synthetic resin-impregnated paper with a thickness of about 1 to 5 mm, etc. are appropriately selected. The acoustic properties of such an intermediate material 8 are particularly influenced by its air permeability and thickness, and the higher the air permeability, the more transparent it is acoustically, and the less it changes the sound absorption characteristics of the sound absorbing board as a whole. becomes smaller. As described above, this intermediate material 8 is integrated with the wooden veneer 7 to form the surface rigidity material 9, and if the intermediate material 8 is a synthetic resin foam, it is bonded and integrated with the wooden veneer 7 during the foaming process. It can be integrated by bonding sheet-like foam with adhesive. Further, when the intermediate material 8 is a nonwoven fabric, ceramic foam, punched metal plate, etc., it is bonded and integrated using a reticulated hot melt adhesive or the like. Furthermore, in the case of synthetic resin film, a synthetic resin liquid such as paint is applied directly to the wooden veneer. In the case of synthetic resin-impregnated paper, the impregnated paper is bonded to a wooden veneer by heat-pressure treatment and integrated.
この木質単板７と中間材８とからなる表面剛性
材９は、枠体５に酢酸ビニルエマルジヨン、エチ
レン−酢酸ビニル共重合エマルジヨン、ボリウレ
タンなどの接着剤を用いて固着されている。 The surface rigidity material 9 made of the wood veneer 7 and the intermediate material 8 is fixed to the frame 5 using an adhesive such as vinyl acetate emulsion, ethylene-vinyl acetate copolymer emulsion, polyurethane, or the like.
このような構造の吸音板にあつては、表面材が
木質単板７であるため、天然木材の美麗な外観を
呈し、かつ芯層となる吸音材６によつて良好な吸
音特性を示す。そして、中間材８を種々選択する
ことにより、吸音特性、特に中高音域の吸音特性
を変化させることができる。例えば、木質単板７
に中間材８として厚さ0.1mm程度の合成樹脂膜を
形成したものを用いれば、膜による吸音特性の変
化が小さく、吸音材６そのものの吸音特性が表わ
れ、第２図のグラフの曲線Ａに示すように、約
1KHz以上での吸音率が大きくなり、厚さ0.2mm程
度の合成樹脂膜を形成したものでは、通気性がや
や減少し曲線Ｂに示すように約1KHz以上での吸
音率が若干低くなり、厚さ２〜３mmの発泡体や合
成樹脂含浸紙などを用いたものでは、通気性が大
きく減少し曲線Ｃに示すように約1KHz以上の吸
音率が大きく低下する。よつて、吸音板の用いら
れる室内の音響的条件に合致した最適の吸音特性
を有するものを用意することができる。 In the sound absorbing board having such a structure, since the surface material is the wooden veneer 7, it has the beautiful appearance of natural wood, and also exhibits good sound absorbing properties due to the sound absorbing material 6 serving as the core layer. By selecting various intermediate materials 8, the sound absorption properties, especially the sound absorption properties in the middle and high frequency range, can be changed. For example, wood veneer 7
If a synthetic resin film with a thickness of about 0.1 mm is used as the intermediate material 8, the change in the sound absorption characteristics due to the film will be small, and the sound absorption characteristics of the sound absorption material 6 itself will appear, and the curve A in the graph of FIG. As shown in approx.
The sound absorption coefficient at frequencies above 1KHz increases, and when a synthetic resin film with a thickness of about 0.2 mm is formed, the air permeability decreases slightly, and as shown in curve B, the sound absorption coefficient at frequencies above 1KHz slightly decreases, and the thickness increases. In the case of using foam or synthetic resin-impregnated paper with a diameter of 2 to 3 mm, the air permeability is greatly reduced, and as shown by curve C, the sound absorption coefficient of about 1 KHz or more is greatly reduced. Therefore, it is possible to prepare a sound absorbing board having optimal sound absorbing characteristics that match the acoustic conditions of the room in which the sound absorbing board is used.
また、中間体８に剛性のある合成樹脂発泡体、
セラミツク発泡体、パンチングメタルなどを用い
れば、表面剛性材９の剛性が向上し、機械的強度
が強くなつて好ましい。 In addition, the intermediate body 8 is made of rigid synthetic resin foam,
It is preferable to use ceramic foam, punched metal, or the like because the rigidity of the surface rigidity material 9 is improved and the mechanical strength is increased.
さらに、表層となる木質単板７と表面材となる
木質単板４とに同一樹脂のものを用いれば、吸音
板を裏がえしにして裏面材の木質単板４を表側に
露出させても、外観の点で何んら変化がなく、吸
音特性を反射特性に変えることができる。よつ
て、この吸音板を多数壁、天井等に貼付すると
き、一部の吸音板を裏がえしにして反射性を付与
し、全体の吸音特性を任意に調節することがで
き、しかも外観上、異和感を与えることがない。 Furthermore, if the same resin is used for the wooden veneer 7 serving as the surface layer and the wooden veneer 4 serving as the facing material, the sound absorbing board can be turned over and the wooden veneer 4 serving as the backing material is exposed on the front side. However, the sound absorbing properties can be changed to reflective properties without any change in appearance. Therefore, when attaching a large number of sound absorbing boards to walls, ceilings, etc., some of the sound absorbing boards can be turned over to give them reflectivity, allowing the overall sound absorbing properties to be adjusted as desired, and also improving the appearance. Above, it does not give any discomfort.
第１図に示した構成の吸音板において、基板１
に厚さ20mmラウン合板を、吸音材６に厚さ20mmガ
ラスウール（64Kg／m2）を、表面層となる木質単
板に厚さ0.4mmナラ単板を使用し、中間材８を
種々選択してその吸音特性を垂直入射吸音率で評
価した。
In the sound absorbing plate having the configuration shown in FIG.
20mm thick round plywood was used for the sound absorbing material 6, 20mm thick glass wool (64Kg/ m2 ) was used for the sound absorbing material 6, 0.4mm thick oak veneer was used for the surface layer wood veneer, and various intermediate materials 8 were selected. The sound absorption characteristics were evaluated using the normal incidence sound absorption coefficient.
○イ 中間材として、厚さ0.1mmの樹脂塗膜をナラ
単板に形成し、これに厚さ３mmのポリビニルホ
ルマール発泡体を貼着したものの吸音特性を第
３図に示す。○B As an intermediate material, a resin coating film with a thickness of 0.1 mm is formed on a single oak board, and a polyvinyl formal foam with a thickness of 3 mm is attached to this, and the sound absorption properties are shown in Figure 3.
○ロ 中間材として、厚さ0.1mmの樹脂塗膜をナラ
単板に形成したものの吸音特性を第４図に示
す。○B Figure 4 shows the sound absorption properties of a 0.1 mm thick resin coating formed on a single oak board as an intermediate material.
○ハ 中間材として、厚さ１mmの不飽和ポリエステ
ル樹脂含浸紙をナラ単板に熱圧したものの吸音
特性を第５図に示す。○C Figure 5 shows the sound absorption properties of a 1 mm thick unsaturated polyester resin-impregnated paper hot-pressed onto an oak veneer as an intermediate material.
○ニ 中間材として厚さ４mmのポリビニルホルマー
ル発泡体を用いたものの吸音特性を第６図に示
す。○D Figure 6 shows the sound absorption properties of a 4 mm thick polyvinyl formal foam used as an intermediate material.
なお、第３〜６図のグラフにおいて、破線で示
すものは、いずれも厚さ２mmグラスウール（64
Kg／m2）単品の吸音率である。 In the graphs in Figures 3 to 6, the dashed lines indicate glass wool with a thickness of 2 mm (64 mm).
Kg/m 2 ) Sound absorption coefficient of a single item.
第３〜６図のグラフから明らかなように、中間
材を変えることにより、約1KHz以上の中高音域
の吸音率を変化させることができる。 As is clear from the graphs in Figures 3 to 6, by changing the intermediate material, it is possible to change the sound absorption coefficient in the mid-to-high frequency range of about 1 KHz or higher.
以上説明したように、この発明の吸音板は、木
質単板からなる表面層と吸音材からなる芯層との
間に音響的に半透過性の中間材からなる中間制御
層を介挿したものであるので、表面が天然木の美
麗な外観となり、かつ良好な吸音率を示す。ま
た、中間材として音響特性の異なるものを選択す
ることにより、特に中高音域での吸音特性を任意
に変化させることができ、使用条件に適切に合致
する吸音板を用意することができる。
As explained above, the sound-absorbing board of the present invention has an intermediate control layer made of an acoustically semi-transparent intermediate material interposed between the surface layer made of a wooden veneer and the core layer made of a sound-absorbing material. Therefore, the surface has the beautiful appearance of natural wood and exhibits good sound absorption coefficient. Furthermore, by selecting intermediate materials with different acoustic properties, the sound absorption properties, especially in the mid-to-high range, can be arbitrarily changed, and a sound absorption plate that appropriately meets the usage conditions can be prepared.
第１図は、この発明の吸音板の一例を示す概略
断面図、第２図は、この発明の吸音板の作用効果
を表わす吸音特性の変化を示すグラフ、第３図な
いし第６図は、いずれも実験例の結果を示す吸音
特性のグラフである。
６……吸音材（芯層）、７……木質単板（表面
層）、８……中間材（中間制御層）。
FIG. 1 is a schematic sectional view showing an example of the sound absorbing plate of the present invention, FIG. 2 is a graph showing changes in sound absorption characteristics showing the effects of the sound absorbing plate of the present invention, and FIGS. 3 to 6 are: Both are graphs of sound absorption characteristics showing the results of experimental examples. 6...Sound absorbing material (core layer), 7...Wood veneer (surface layer), 8...Intermediate material (intermediate control layer).
Claims (1)
音材からなる芯層と、上記表面層と芯層との間に
介挿され、音響的に半透過性の中間材からなる中
間制御層を有してなる吸音板。 ２ 上記中間材が連続発泡体である特許請求の範
囲第１項記載の吸音板。 ３ 上記表面層と中間制御層とが一体化されてな
る特許請求の範囲第１項または第２項記載の吸音
板。[Scope of Claims] 1. An acoustically transparent surface layer made of a wooden veneer, a core layer made of a sound absorbing material, and an acoustically semitransparent intermediate layer interposed between the surface layer and the core layer. A sound absorbing board having an intermediate control layer made of material. 2. The sound absorbing board according to claim 1, wherein the intermediate material is an open foam. 3. The sound absorbing plate according to claim 1 or 2, wherein the surface layer and the intermediate control layer are integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61100480A JPS62257200A (en) | 1986-04-30 | 1986-04-30 | Sound absorbing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61100480A JPS62257200A (en) | 1986-04-30 | 1986-04-30 | Sound absorbing plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62257200A JPS62257200A (en) | 1987-11-09 |
| JPH054675B2 true JPH054675B2 (en) | 1993-01-20 |
Family
ID=14275083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61100480A Granted JPS62257200A (en) | 1986-04-30 | 1986-04-30 | Sound absorbing plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62257200A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007334285A (en) * | 2006-05-16 | 2007-12-27 | Hitachi Ltd | Sound absorbing structure and rail vehicle |
-
1986
- 1986-04-30 JP JP61100480A patent/JPS62257200A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62257200A (en) | 1987-11-09 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |