JPS5922960B2 - Soundproof box with excellent sound absorption and transmission loss - Google Patents

Soundproof box with excellent sound absorption and transmission loss

Info

Publication number
JPS5922960B2
JPS5922960B2 JP51048064A JP4806476A JPS5922960B2 JP S5922960 B2 JPS5922960 B2 JP S5922960B2 JP 51048064 A JP51048064 A JP 51048064A JP 4806476 A JP4806476 A JP 4806476A JP S5922960 B2 JPS5922960 B2 JP S5922960B2
Authority
JP
Japan
Prior art keywords
sound
transmission loss
absorbing
insulating plate
vibration
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
Application number
JP51048064A
Other languages
Japanese (ja)
Other versions
JPS52130601A (en
Inventor
方辰 田村
憲夫 村上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resonac Holdings Corp
Showa Koji KK
Original Assignee
Showa Denko KK
Showa Koji KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Showa Denko KK, Showa Koji KK filed Critical Showa Denko KK
Priority to JP51048064A priority Critical patent/JPS5922960B2/en
Publication of JPS52130601A publication Critical patent/JPS52130601A/en
Publication of JPS5922960B2 publication Critical patent/JPS5922960B2/en
Expired legal-status Critical Current

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  • Building Environments (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Description

【発明の詳細な説明】 この発明は音エネルギーに対する吸音率と透過損失のす
ぐれた防音箱体に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a soundproof box with excellent sound absorption coefficient and transmission loss for sound energy.

防音体の透過損失の向上については質量則によつて音源
に面する板の面密度(kg/ 771’)に従うとされ
ている。
According to the mass law, the improvement in the transmission loss of a soundproofing body is said to depend on the areal density (kg/771') of the plate facing the sound source.

また一方防音体が箱体の場合は基体振動波形にもとづい
て理論的に、例えば基本、3倍音、5倍音というように
周期性をもつた透過損失の急降下点をもつている。次に
本発明について詳述する。
On the other hand, if the soundproofing body is a box, theoretically based on the vibration waveform of the base, the transmission loss has steep drop points with periodicity, such as the fundamental, 3rd overtone, and 5th overtone. Next, the present invention will be explained in detail.

第一にこの発明は防音体の吸音材室を従来の板構造でな
く網構造とすることによつて箱体のもつ固有の基本振動
を回避し倍音による透過損失の降下をなくするものであ
る。
First, this invention avoids the inherent fundamental vibration of the box body by making the sound-absorbing material chamber of the soundproof body have a net structure instead of the conventional plate structure, thereby eliminating the drop in transmission loss due to overtones. .

つぎに、吸音材室に吸音材(例えばロックウールとグラ
スウール)を多層にいれて吸音ユニットを構成し、更に
、空間層を設けて極度に吸音率を高め、音エネルギーを
消失させる。
Next, multiple layers of sound absorbing materials (for example, rock wool and glass wool) are placed in the sound absorbing material chamber to form a sound absorbing unit, and a spatial layer is further provided to extremely increase the sound absorption coefficient and dissipate sound energy.

さらにこの吸音室ユニットと弾性結合させた非金属性遮
音板とによつて遮音し、透過損失の降下現象を起さない
で各周波数において正切(tanα)的平坦で優れた透
過損失を得ることができるようにしたものである。一般
には透過損失を高めようとするためには面密度を増せば
よいが、コインシデンス効果によつてその降下現象を起
すため防音上必要な周波数領域で透過損失を向上するこ
とができない。
Furthermore, it is possible to insulate sound by using this sound-absorbing room unit and a non-metallic sound insulating plate that is elastically coupled, and to obtain excellent transmission loss that is exactly tan α flat at each frequency without causing a drop in transmission loss. It has been made possible. Generally, in order to increase transmission loss, it is sufficient to increase the areal density, but since the coincidence effect causes a drop phenomenon, transmission loss cannot be improved in the frequency range required for soundproofing.

通常、製作されている防音箱体は有効な空気層をもつた
二重壁構造としての理論にもとづくものであるが、この
場合は振動理論式(二次式)によつて基本振、動および
3倍音5倍音の振動によつて透過損失が或周波数におい
て極少値を示すような降下を生じる。この発明は網板例
えば工クズパッドメタルで在来製品の重量関連からみる
と3kg/イ程度の軽量な篭体を構成し、これによつて
基本振動などの降下現象をさけうることに着目したもの
である。
Normally, the manufactured soundproof box is based on the theory of a double wall structure with an effective air layer, but in this case, basic vibration, vibration, and The vibrations of the third and fifth harmonics cause the transmission loss to drop to a minimum value at a certain frequency. This invention focuses on constructing a lightweight case of about 3 kg/I from the weight of conventional products using mesh plates, such as engineered scrap pad metal, and thereby avoiding falling phenomena such as basic vibration. It is something.

つぎに吸音については、特性の異なる吸音材の最適組合
せを開発して多層としたもので、例えばグラスウール4
01]厚、ロツクウール251s厚の組合せとし、さら
に、一定の空間層を付加して吸音率を極度に高めたもの
である。つぎに本発明の遮音板4は例えば1511厚さ
の繊維入非金属板を用いている。
Next, regarding sound absorption, we have developed an optimal combination of sound absorbing materials with different characteristics and made them multi-layered. For example, glass wool 4
01] thickness and rock wool 251s thickness, and furthermore, a certain space layer is added to extremely increase the sound absorption coefficient. Next, the sound insulating plate 4 of the present invention uses a fiber-filled non-metallic plate having a thickness of, for example, 1511 mm.

この場合、金属板ではコインシデンス効果が避けられな
い。然し本発明の繊維入非金属板に於てはコインシデン
ス効果を生せず、更に弾性連結によつてエネルギーを減
衰させることとによつて相乗効果を表わし優れた遮音効
果を示すことができる。
In this case, the coincidence effect cannot be avoided with metal plates. However, the fiber-containing non-metallic plate of the present invention does not produce the coincidence effect, and further exhibits a synergistic effect by attenuating energy through elastic connections and exhibits an excellent sound insulation effect.

第1図はこの発明の防音箱体の構成の1例を示す。FIG. 1 shows an example of the structure of a soundproof box according to the present invention.

即ち1は網板の1種である工クズパッドメタルで構成し
た長尺の角形篭体の吸音材室であつて、図において1a
は音源面1bは背面を示す。尚、音源側面の開口率は9
0%以上とすることが必要である。内部には吸音材2a
(例えばグラスウール)と2b(例えばロツクウール)
とが複層として内蔵される。
That is, 1 is a sound-absorbing material chamber with a long rectangular box made of engineered scrap pad metal, which is a type of mesh board, and is designated by 1a in the figure.
The sound source surface 1b indicates the back surface. Furthermore, the aperture ratio on the side of the sound source is 9.
It is necessary to set it to 0% or more. Sound absorbing material 2a inside
(e.g. glass wool) and 2b (e.g. rock wool)
are built in as multiple layers.

吸音材室と遮音板4とは空間層5を隔て\相対してもう
けられており、この空間層5は特に低周波側の吸音率を
向上させるものである。
The sound-absorbing material chamber and the sound-insulating plate 4 are placed opposite to each other with a space layer 5 interposed therebetween, and this space layer 5 improves the sound absorption coefficient particularly on the low frequency side.

吸音材室と遮音板4との結合は制振連結構造6により行
われており、篭体1と\もに箱枠3a,3bに一体化し
て防音箱体が構成される。1a,1bと3a,3bとは
スポツトウエルド8a〜8fなどの方法によつて容易に
固定できる。
The sound absorbing material chamber and the sound insulating board 4 are connected by a vibration damping connection structure 6, and the casing 1 and the box frames 3a and 3b are integrated to form a sound insulating box body. 1a, 1b and 3a, 3b can be easily fixed by a method such as spot welding 8a to 8f.

制振連結構造6はたわみ、ひずみ効果等をもつ如く遮音
板と吸音ユニツトとを弾性結合するものである。更に、
この制振連結構造6は箱枠3a,3bと遮音板4との間
には、弾性、接着、防水の性能で、しかも音、振動に対
して適した材料(これを制振材という)、例えば合成ゴ
ム6aを接着して音エネルギーを漏洩させないようにす
る。取付用のボルト7aは遮音板4の裏側にも合成ゴム
ワツシヤ一6bワツシヤ一6cをおき、これを介してナ
ツト7C1ワツシヤー7bによつて取付けられる。尚、
遮音板4が騒音、振動、気象関係を含む物理的外力によ
つて変形することがある。
The vibration damping connection structure 6 elastically connects the sound insulating plate and the sound absorbing unit so as to have a deflection, distortion effect, etc. Furthermore,
This vibration-damping connection structure 6 uses a material (called a vibration-damping material) that has elastic, adhesive, and waterproof properties and is suitable for sound and vibration between the box frames 3a, 3b and the sound insulation plate 4. For example, synthetic rubber 6a is bonded to prevent sound energy from leaking. A synthetic rubber washer 16b and a washer 6c are also placed on the back side of the sound insulating plate 4, and the mounting bolt 7a is attached via a nut 7C1 and a washer 7b. still,
The sound insulating plate 4 may be deformed by physical external forces including noise, vibration, and weather-related forces.

これを防ぐために、例えば吸音材質、多孔質体6d(例
えばミネラボード、パーライト繊維板)を合成ゴム接着
板6eによつて篭体1bに接着したものによつてボルト
部を支持している。遮音板4として好ましいものは比重
1.7〜2.1g/(−dのガラス繊維強化セメントで
ある。
In order to prevent this, the bolt portion is supported by, for example, a sound-absorbing material, a porous body 6d (for example, mineral board, perlite fiberboard) bonded to the housing 1b by a synthetic rubber adhesive plate 6e. A preferable material for the sound insulation board 4 is glass fiber reinforced cement with a specific gravity of 1.7 to 2.1 g/(-d).

前記ガラス繊維強化セメントは長さ6〜2511のガラ
ス繊維がセメント中に1〜7重量%で均一に分散されて
いるものであり、特にたわみ力及び衝撃値がすぐれ、コ
インシデン又効果の少いものがよい。箱枠3a,3bは
アルミニウム又は鋼板製の薄肉のものが好ましい。又、
長手方向の両側面は密閉構造としてある。箱体の長さは
例えば2mというように任意の長尺に構成することがで
きる。以上にのべた本発明は、多層の吸音材を内蔵せる
網板製の篭体よりなる吸音ユニツトと繊維入非金属板と
よりなる遮音板とが、空間層を隔て\相対してもうけら
れており、吸音ユニツトと遮音板とは相対する面間に両
者を接続するようにもうけられた吸音材質多孔質体と、
両者の端部において両者を一体として覆い、かつ遮音板
との間には制振材がもうけられている箱枠とよりなる制
振連結構造によつて結合し、かつ音源側の開口率が少な
くとも90%で側部は密閉構造として一体に構成されて
いる防盲箱体に関するものである。この防音箱体は例え
ば500m11!巾としておき、鋼またはコンクリート
製の支柱の溝部に差込んで重積することによつて容易に
所要の高さの防音壁を構成することができる。
The glass fiber reinforced cement has glass fibers having a length of 6 to 2,511 mm uniformly dispersed in the cement at a concentration of 1 to 7% by weight, and has particularly excellent deflection force and impact value, and has little coincidence or effect. Good. The box frames 3a and 3b are preferably thin-walled ones made of aluminum or steel plate. or,
Both sides in the longitudinal direction have a sealed structure. The length of the box can be arbitrarily long, for example, 2 m. In the present invention described above, a sound absorbing unit made of a mesh board housing containing multilayer sound absorbing material and a sound insulating board made of a fiber-filled non-metal plate are placed facing each other with a spatial layer separated. In this case, the sound absorbing unit and the sound insulating plate have a porous body made of a sound absorbing material that connects them between opposing surfaces;
They are connected by a vibration-damping connection structure consisting of a box frame that integrally covers both ends and has a damping material between it and the sound-insulating plate, and the aperture ratio on the sound source side is at least 90% of the cases relate to blind-proof boxes whose sides are integrally constructed as a sealed structure. This soundproof box is, for example, 500m11! A soundproof wall of a desired height can be easily constructed by inserting the same width into the grooves of steel or concrete pillars and stacking them one on top of the other.

吸音性能のうち吸音率についてのべるならば、グラスウ
ールは630Hz以上の高周波領域において高くロツク
ウールは500Hz以下において高いという特性をもつ
ている。
In terms of sound absorption coefficient, glass wool has a high sound absorption coefficient in the high frequency range of 630 Hz or higher, and rock wool has a high sound absorption coefficient in the high frequency range of 500 Hz or lower.

これらを複層させた場合には音源に面する側の吸音材の
支配力が勝り、かつ、背面の影響も受けて、音響的諸要
素の影響現象で、共重合理論、ハレーシヨン、エラヂエ
ーシヨン的効果等により吸盲に対して低、中、高周波全
領域に高性能吸盲率を保有する特殊吸盲材体となすこと
ができる。次に実施例をあげて説明する。
When these are multi-layered, the dominating power of the sound absorbing material on the side facing the sound source is dominant, and it is also influenced by the back side, and due to the effects of various acoustic elements, effects such as copolymerization theory, halation, and erasure can be achieved. By using the above method, it is possible to create a special absorbing material that has a high absorbing rate in all low, medium, and high frequency ranges. Next, an example will be given and explained.

実施例 篭体は網目45ミリの工クズパッドメタルを用い、吸音
材は皆源側より、まずグラスウール40m1(32kg
/77?)ついでロツクウール25n(150k9/イ
)を複層にもうけて吸音ユニツトとし、空間層間隔12
詣でガラス繊維強化セメント板15m1(面密度30k
g/イ)を遮音板としてもうけて防音箱体を構成せしめ
た。
The case of the embodiment is made of engineered scrap pad metal with a mesh of 45 mm, and the sound absorbing materials are all made from the source side. First, 40 m1 of glass wool (32 kg
/77? ) Next, a sound absorbing unit was made by layering rock wool 25n (150k9/a), and the spatial layer spacing was 12.
Pilgrimage glass fiber reinforced cement board 15m1 (area density 30k
g/a) was used as a sound insulating board to form a soundproof box body.

この場合、有効域において次表に示す如く90%以上の
優れた吸音率を示した。
In this case, an excellent sound absorption coefficient of 90% or more was exhibited in the effective range as shown in the following table.

更にこの防皆箱体における透過損失と周波数との関係を
第2図に示す。
Furthermore, FIG. 2 shows the relationship between transmission loss and frequency in this shielding box.

図において縦軸は透過損失(DB)横軸は周波数(Hz
)である。第2図は、面密度(501<g/イ)の理論
計算値を有効域において5dB以上超え、周期性をもた
ないすぐれた透過損失を示している。
In the figure, the vertical axis is transmission loss (DB) and the horizontal axis is frequency (Hz
). FIG. 2 shows an excellent transmission loss that exceeds the theoretically calculated value of the areal density (501<g/a) by more than 5 dB in the effective range and has no periodicity.

前記吸音率及び第2図に本発明の防音箱体の吸音率及び
透過損失のすぐれていることはあきらかである。
It is clear from the above sound absorption coefficient and FIG. 2 that the sound absorption coefficient and transmission loss of the soundproof box of the present invention are excellent.

【図面の簡単な説明】 第1図は本発明の防盲箱体の構造の1例を示す断面図で
ある。 第2図は本発明の防径箱体の透過損失効果を示す図であ
る。図中、1・・・・・・吸音材室、1a・・・・・・
音源側側面、1b・・・・・・背部側面、2a,2b・
・・・・・吸音材、3a,3b・・・・・・箱枠、4・
・・・・・遮音板、5・・・・・・空間層、6・・・・
・・制振連結構造。
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an example of the structure of the blind-proof box according to the present invention. FIG. 2 is a diagram showing the transmission loss effect of the diameter-proof box of the present invention. In the figure, 1... Sound absorbing material chamber, 1a...
Sound source side side, 1b... Back side, 2a, 2b.
...Sound absorbing material, 3a, 3b...Box frame, 4.
... Sound insulation board, 5 ... Spatial layer, 6 ...
...Vibration damping connection structure.

Claims (1)

【特許請求の範囲】 1 多層の吸音材を内蔵せる網板製の篭体よりなる吸音
ユニットと、繊維入非金属板とよりなる遮音板とが、空
間層を隔てゝ相対してもうけられており、吸音ユニット
と遮音板とは 相対する面間に両者を接続するようにもうけられた吸音
材質多孔質体と、両者の端部において両者を一体として
覆い、かつ遮音板との間には制振材がもうけられている
箱体とよりなる制振連結構造によつて結合し、かつ音源
側の開口率が少なくとも90%で側部は、密閉構造とし
て一体に構成されている防音箱体。
[Scope of Claims] 1. A sound absorbing unit made of a mesh board housing containing multi-layered sound absorbing material and a sound insulating plate made of a non-metallic plate filled with fibers are provided facing each other with a spatial layer in between. The sound-absorbing unit and the sound-insulating plate have a porous body made of a sound-absorbing material that connects them between opposing surfaces, and a sound-absorbing porous body that integrally covers both at their ends, and a control material between the sound insulating plate and the sound-absorbing unit. A soundproof box body which is connected to a box body provided with a vibration material by a vibration damping connection structure, and which has an aperture ratio of at least 90% on the sound source side and whose side portions are integrally constructed as a sealed structure.
JP51048064A 1976-04-26 1976-04-26 Soundproof box with excellent sound absorption and transmission loss Expired JPS5922960B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP51048064A JPS5922960B2 (en) 1976-04-26 1976-04-26 Soundproof box with excellent sound absorption and transmission loss

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP51048064A JPS5922960B2 (en) 1976-04-26 1976-04-26 Soundproof box with excellent sound absorption and transmission loss

Publications (2)

Publication Number Publication Date
JPS52130601A JPS52130601A (en) 1977-11-02
JPS5922960B2 true JPS5922960B2 (en) 1984-05-30

Family

ID=12792913

Family Applications (1)

Application Number Title Priority Date Filing Date
JP51048064A Expired JPS5922960B2 (en) 1976-04-26 1976-04-26 Soundproof box with excellent sound absorption and transmission loss

Country Status (1)

Country Link
JP (1) JPS5922960B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11156255B2 (en) 2018-07-27 2021-10-26 Honda Motor Co., Ltd. Power unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS562722Y2 (en) * 1976-04-27 1981-01-22

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5420544B2 (en) * 1972-02-25 1979-07-24
JPS5150807U (en) * 1974-10-16 1976-04-17

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11156255B2 (en) 2018-07-27 2021-10-26 Honda Motor Co., Ltd. Power unit

Also Published As

Publication number Publication date
JPS52130601A (en) 1977-11-02

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