JPH03223186A - Sound-absorbing material - Google Patents
Sound-absorbing materialInfo
- Publication number
- JPH03223186A JPH03223186A JP1752790A JP1752790A JPH03223186A JP H03223186 A JPH03223186 A JP H03223186A JP 1752790 A JP1752790 A JP 1752790A JP 1752790 A JP1752790 A JP 1752790A JP H03223186 A JPH03223186 A JP H03223186A
- Authority
- JP
- Japan
- Prior art keywords
- sound
- absorbing
- low
- powder
- frequency
- 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
- 239000011358 absorbing material Substances 0.000 title claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 24
- 239000011491 glass wool Substances 0.000 claims abstract description 14
- 239000011490 mineral wool Substances 0.000 claims abstract description 6
- 239000002657 fibrous material Substances 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 25
- 239000000463 material Substances 0.000 abstract description 14
- 239000011148 porous material Substances 0.000 abstract description 8
- 239000010445 mica Substances 0.000 abstract description 6
- 229910052618 mica group Inorganic materials 0.000 abstract description 6
- 239000005995 Aluminium silicate Substances 0.000 abstract description 2
- 235000012211 aluminium silicate Nutrition 0.000 abstract description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 abstract description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052901 montmorillonite Inorganic materials 0.000 abstract description 2
- 239000000454 talc Substances 0.000 abstract description 2
- 229910052623 talc Inorganic materials 0.000 abstract description 2
- 239000000945 filler Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 5
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 4
- 239000006260 foam Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910052628 phlogopite Inorganic materials 0.000 description 2
- 229910052902 vermiculite Inorganic materials 0.000 description 2
- 239000010455 vermiculite Substances 0.000 description 2
- 235000019354 vermiculite Nutrition 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 hallosite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229910052903 pyrophyllite Inorganic materials 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〕
本発明の吸音材は次のような場合に用いられる（１）
リスニングルーム、楽器練習室等の内装材として用いる
。室内の音響特性が問題となる部屋で、室内残響時間特
性、反射特性などを制御するために仕上げ用の内装材と
して用いる。[Detailed Description of the Invention] (Industrial Application Field) The sound absorbing material of the present invention is used in the following cases (1)
Used as interior material for listening rooms, musical instrument practice rooms, etc. Used as a finishing interior material to control indoor reverberation time characteristics, reflection characteristics, etc. in rooms where indoor acoustic characteristics are a problem.
（２） 壁・天井の充填材として用いる。(2) Used as a filling material for walls and ceilings.
遮音性能が要求される部屋では、壁、天井の遮音性能を
向上させるために、２重壁構造を取る場合が多いが、更
に性能を上げるために、２重壁間に吸音材を充填する場
合が多い。そのような目的のために用いる。In rooms where sound insulation performance is required, a double wall structure is often used to improve the sound insulation performance of walls and ceilings, but in order to further improve the performance, sound absorbing material may be filled between the double walls. There are many. used for such purposes.
（３） その他、吸音ダクトの内貼り用、騒音を発生す
る機械、機器の防音カバーの内貼りなどにも用いる。(3) In addition, it is also used for lining sound-absorbing ducts, and for lining the soundproof covers of machines and equipment that generate noise.
従来の吸音材である発泡ウレタン、グラスウールなどは
、第２図および第３図に示すように素材の多孔性を利用
している。すなわち、第２図および第３図に示すような
、発泡ウレタン４やグラスウール５の連通した気泡（３
）または孔（４）の中に音波が入射すると、それが複雑
な断面形状をした連続気泡であるために、音波が伝搬し
ていく途中で気泡壁面との粘性摩擦などによって音圧が
減少し、その結果、音波エネルギが材料の中で吸収され
るのである。Conventional sound absorbing materials such as urethane foam and glass wool utilize the porosity of the material, as shown in FIGS. 2 and 3. That is, as shown in FIGS. 2 and 3, the connected air bubbles (3
) or hole (4), the sound pressure decreases due to viscous friction with the cell wall as the sound wave propagates, as it is an open cell with a complex cross-sectional shape. , as a result, sonic energy is absorbed within the material.
発泡ウレタン（密度２０ｋｇ／ｓ＋”、厚さ２４ｍ５＋
）とグラスウール（密度３２ｋｇ／ｎ＋”、厚さ２４ｍ
ｍ）の垂直入射吸音率を第４図（ａ）、（ｂ）に示す。Foamed urethane (density 20kg/s+”, thickness 24m5+
) and glass wool (density 32 kg/n+”, thickness 24 m
Figures 4(a) and 4(b) show the normal incidence sound absorption coefficient of m).
多孔質材料の吸音率は、音波の単位時間当りの圧力変動
の回数が多い程、また波長に比べて音波の伝搬距離が長
い程大きくなる。すなわち、音波の周波数が高くなる程
、また吸音材の厚さが厚くなる程、吸音率が大きくなる
。換言すれば、低周波数の音波に対しては小さい吸音率
しかもたない低周波数の吸音率を上げようとすれば、従
来の吸音材では、材厚を厚くしなければならないが、厚
くすれば部屋の内装材として使用した場合、部屋が狭く
なったり、また、ダクトの内張りとして使用した時には
、空気の通路が狭（なってしまうという問題が生じる。The sound absorption coefficient of a porous material increases as the number of pressure fluctuations per unit time of the sound wave increases and as the propagation distance of the sound wave becomes longer than the wavelength. That is, the higher the frequency of the sound wave and the thicker the sound absorbing material, the higher the sound absorption coefficient. In other words, in order to increase the low-frequency sound absorption coefficient, which has a small sound absorption coefficient for low-frequency sound waves, conventional sound-absorbing materials must be made thicker. When used as an interior decoration material, the room becomes narrower, and when used as the lining of a duct, the air passage becomes narrower.
低周波数の吸音は、リスニングルームの室内音響、壁・
天井等の遮音、機械騒音の抑制、いずれの場合にも重要
な位置を占める。Low frequency sound absorption is achieved by the indoor acoustics of the listening room, walls and
It plays an important role in both sound insulation of ceilings and suppression of machine noise.
〔発明が解決しようとする課題］
本発明が解決しようとする課題は、材厚が薄くても低周
波音の吸音率の高い吸音材を提供することである。[Problem to be Solved by the Invention] The problem to be solved by the present invention is to provide a sound-absorbing material that has a high sound absorption coefficient for low-frequency sound even if the material is thin.
本発明の要旨とするところは、低周波の吸音性能を有す
る粉体を、振動可能な状態でグラスウール、ロックウー
ルなどの繊細質多孔材に含ませ、高周波域のみならず、
低周波域でも吸音率の高い吸音材である。The gist of the present invention is to incorporate powder having low-frequency sound absorption performance into a delicate porous material such as glass wool or rock wool in a vibrating state, so that it can absorb sound not only in the high frequency range but also in the high frequency range.
It is a sound absorbing material with high sound absorption coefficient even in the low frequency range.
この粉体の吸音性能は、粉体粒子の大きさ、形状（例え
ば、フレーク状粉体であればアスペクト比）、粉体集合
体としての密度、凝集状態などにより、その吸音特性が
変化する。第５図乃至第９図に粒子径の異なるフレーク
状粉体の垂直入射の吸音率特性を示す。ここで示した粉
体はマイカで、その粒子径などの物性は次記する表−１
に示す以下余白
粒子径によって粉体の吸音率特性は異なるものとなって
いるが、全般に高い吸音率を有していることがわかる。The sound absorption properties of this powder vary depending on the size and shape of the powder particles (for example, the aspect ratio in the case of flaky powder), the density of the powder aggregate, the state of aggregation, and the like. FIGS. 5 to 9 show the sound absorption coefficient characteristics of flake-like powders having different particle sizes upon normal incidence. The powder shown here is mica, and its physical properties such as particle size are shown in Table 1 below.
Although the sound absorption coefficient characteristics of the powder differ depending on the particle size of the blank space shown in the figure below, it can be seen that the powder has a high sound absorption coefficient in general.
特に、粒子径の小さい場合、第１０図に示す、同厚のグ
ラスウールの吸音特性に比べて低周波域の吸音性能が良
好である。In particular, when the particle size is small, the sound absorption performance in the low frequency range is better than that of glass wool of the same thickness as shown in FIG.
このような粉体を吸音材として用いる場合、これを成形
しなければ実用に適さない。しかし、成形のために、粉
体の振動を拘束してしまった場合は第４図乃至第９図に
示すような高い吸音率を持たせることができない。When such powder is used as a sound absorbing material, it is not suitable for practical use unless it is molded. However, if the vibration of the powder is restrained for molding, it is not possible to provide a high sound absorption coefficient as shown in FIGS. 4 to 9.
そのため、粉体の振動が可能な状態を保持したまま吸音
材として実用に通したものとなるように低密度のグラス
ウール、ロックウールなどの繊維質多孔材の中に混入（
例えば、機械的に混入）すれば、粉体の振動は拘束され
ないため、粉体自体が有していた吸音特性を低下させる
ことがなく、低周波域で吸音率の高い吸音材となりうる
。Therefore, the powder is mixed into porous fibrous materials such as low-density glass wool and rock wool so that it can be used as a practical sound absorbing material while maintaining its vibrating state.
For example, if it is mechanically mixed in, the vibrations of the powder are not restrained, so the sound absorption properties of the powder itself are not reduced, and the material can become a sound absorbing material with high sound absorption coefficient in the low frequency range.
繊維質多孔材としては、グラスウール、ロックウールに
限るものでなく、また粉体としては、マイカ（金雲母、
黒雲母、白雲母）に限らず、パイロフィライト、タルク
、緑泥石、モンモリロナイト、カオリン、蛇紋石、ハロ
サイト、バーミキュライト、ヒル石などであってもよい
。Fibrous porous materials are not limited to glass wool and rock wool, and powders include mica (phlogopite,
The material is not limited to pyrophyllite, talc, chlorite, montmorillonite, kaolin, serpentine, hallosite, vermiculite, vermiculite, etc.
多孔質材は上述したように、その吸音の原理から薄型の
ままでは低周波音の吸音性能に限界がある。これに対し
、吸音特性を有する粉体は、入射音波の音圧に対してそ
れ自身が振動し音響エネルギーを振動エネルギーに変換
することにより、音波を吸音する作用を有している。As mentioned above, due to the principle of sound absorption, porous materials have a limited sound absorption performance for low frequency sounds if they remain thin. On the other hand, powder having sound absorption properties has the effect of absorbing sound waves by vibrating itself in response to the sound pressure of the incident sound waves and converting the sound energy into vibration energy.
本発明に基づ〈実施例を第１図に示す。グラスウール（
密度１２ｋｇ／＋ａ３）の繊維（２）間に重量平均フレ
ーク径９０μｍ、アスペクト比５０のマイカ（金雲母）
粉体（１）を配合したものである。粉体（１）とグラス
ウール繊維（２）との重量比は１：１であり、粉体のフ
レーク径の分布は重量で６２μｍ以下が４５％、１０５
μｍ〜６２μｍが２０％、２１１μｍ〜１０５μｍが３
３％、５９４μｍ〜２１１ａｍが２％、５９４ μｍ以
下は微量である。この実施例の吸音材は、第８図に近い
吸音性を示す。An embodiment based on the present invention is shown in FIG. glass wool(
Mica (phlogopite) with a weight average flake diameter of 90 μm and an aspect ratio of 50 between the fibers (2) with a density of 12 kg/+a3)
This is a mixture of powder (1). The weight ratio of the powder (1) and the glass wool fiber (2) is 1:1, and the flake diameter distribution of the powder is 45% by weight of 62 μm or less, 105
20% is from μm to 62μm, 3% is from 211μm to 105μm
3%, 2% between 594 μm and 211 am, and a trace amount below 594 μm. The sound absorbing material of this example exhibits sound absorbing properties close to those shown in FIG.
本発明による吸音材は、体刑波の吸音特性を有する粉体
を振動可能な状態で繊維質多孔材の中に配合しているた
め、繊維質多孔材による高周波音波の吸音効果のみなら
ず、粉体が本来有する振動による低周波音波の吸音効果
が得られる、実用に適する吸音材となっている。これに
よって薄型でも低周波域で吸音性の優れた吸音材を得る
ことができる。The sound-absorbing material according to the present invention has the powder having the sound-absorbing property of corporal waves mixed into the fibrous porous material in a state where it can vibrate. It is a sound-absorbing material that is suitable for practical use because it can absorb low-frequency sound waves caused by the body's inherent vibrations. This makes it possible to obtain a sound-absorbing material that is thin but has excellent sound-absorbing properties in the low frequency range.
第１図は本発明の一実施例を示す断面図、第２図は発泡
ウレタンの断面概略図、第３図はグラスウールの断面概
略図、第４図（ａ）は発泡ウレタンの吸音率特性、第４
図（ｂ）はグラスウールの吸音率特性、第５図乃至第９
図はマイカ粉体の吸音率特性、第１０図は第５図乃至第
９図に示したマイカ粉体と同厚の時のグラスウール吸音
率特性を表す図である。
＋ｌＩＨ剛べ碇嘗囮卦
ｅｔｔａべ窩啓徊枡
５３７一Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a schematic cross-sectional view of urethane foam, Fig. 3 is a schematic cross-sectional view of glass wool, and Fig. 4 (a) shows the sound absorption coefficient characteristics of urethane foam. Fourth
Figure (b) shows the sound absorption coefficient characteristics of glass wool, Figures 5 to 9.
The figure shows the sound absorption coefficient characteristics of mica powder, and FIG. 10 shows the sound absorption coefficient characteristics of glass wool when the thickness is the same as that of the mica powder shown in FIGS. 5 to 9. ＋lIH Gobe Ikari 嘗 Decoy Book
Claims (1)
態でグラスウール、ロックウールなどの繊維質多孔材に
含ませたことを特徴とする吸音材。(1) A sound-absorbing material characterized in that a powder having low-frequency sound-absorbing performance is contained in a porous fibrous material such as glass wool or rock wool in a vibrating state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017527A JP2797592B2 (en) | 1990-01-26 | 1990-01-26 | Sound absorbing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017527A JP2797592B2 (en) | 1990-01-26 | 1990-01-26 | Sound absorbing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03223186A true JPH03223186A (en) | 1991-10-02 |
| JP2797592B2 JP2797592B2 (en) | 1998-09-17 |
Family
ID=11946398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017527A Expired - Fee Related JP2797592B2 (en) | 1990-01-26 | 1990-01-26 | Sound absorbing material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2797592B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5015812A (en) * | 1973-06-12 | 1975-02-19 | ||
| JPS61101476A (en) * | 1984-10-24 | 1986-05-20 | 大建工業株式会社 | Mineral fiber board |
-
1990
- 1990-01-26 JP JP2017527A patent/JP2797592B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5015812A (en) * | 1973-06-12 | 1975-02-19 | ||
| JPS61101476A (en) * | 1984-10-24 | 1986-05-20 | 大建工業株式会社 | Mineral fiber board |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2797592B2 (en) | 1998-09-17 |
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