JPS63184795A - Underwater sound isolating material - Google Patents
Underwater sound isolating materialInfo
- Publication number
- JPS63184795A JPS63184795A JP62016205A JP1620587A JPS63184795A JP S63184795 A JPS63184795 A JP S63184795A JP 62016205 A JP62016205 A JP 62016205A JP 1620587 A JP1620587 A JP 1620587A JP S63184795 A JPS63184795 A JP S63184795A
- Authority
- JP
- Japan
- Prior art keywords
- sound insulation
- underwater
- underwater sound
- rubber
- sound insulating
- 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
- 239000000463 material Substances 0.000 title description 7
- 239000012774 insulation material Substances 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 10
- 238000009413 insulation Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Details Of Measuring And Other Instruments (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、水中遮音材に係わり、更に詳しくは船体か
ら水中に放射される雑音を低減するようにした水中遮音
材の改良に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to an underwater sound insulation material, and more specifically, to an improvement of an underwater sound insulation material that reduces noise radiated into the water from a ship's hull. .
従来、船体から水中に放射される雑音を低減する目的で
、船体の船殻外板に貼付けて使用するダンピング材等の
割振材や、防振材またはゴムの中に空孔を設けた遮音材
或いは反射材が使用されていた。Conventionally, in order to reduce the noise radiated into the water from a ship's hull, damping materials and other damping materials used to reduce the noise radiated into the water from the ship's hull, vibration isolating materials, or sound insulating materials with holes in rubber. Or reflective materials were used.
然しなから、このような従来のゴム中に空洞を設けた遮
音材にあっては、圧力特性が良くなく、しかも形状保持
のために空洞をあまり大きくすることができず、また形
状保持の支柱が必要であるために、この支柱から音が漏
れて遮音効果が十分ではなく、水中の音波通信に於ける
受渡妨害となっていた。However, with such conventional sound insulating materials that have cavities in rubber, the pressure characteristics are not good, and the cavities cannot be made very large to maintain their shape, and they require support to maintain their shape. Because of this, sound leaked from these pillars, resulting in insufficient sound insulation and interfering with underwater sound wave communications.
この発明は、かかる従来の問題点に着目して案出された
もので、その目的とするところは成形ゴムに形成した凹
部に、複数の気泡を有する遮音材を埋設して密閉するこ
とにより、船体からの放射雑音を有効に低減させて、遮
音効果を向上させた水中遮音材を提供するものである。This invention was devised by focusing on such conventional problems, and its purpose is to bury and seal a sound insulating material having a plurality of bubbles in a recess formed in molded rubber. An object of the present invention is to provide an underwater sound insulating material that effectively reduces radiation noise from a ship's hull and improves its sound insulating effect.
この発明は上記目的を達成するため、成形ゴムの一側面
に仕切り壁で区画された複数の凹部を形成し、この凹部
内に連続気泡または独立気泡を備えた遮音材・を埋設す
ると共に、その表面側をカバーゴムにより密閉し、この
水中遮音材を船体の内、外面に於ける接水面の船殻に接
着剤等で装着し、水中放射雑音を低減させることを要旨
とするものである。In order to achieve the above object, the present invention forms a plurality of recesses partitioned by partition walls on one side of molded rubber, buries a sound insulating material with open cells or closed cells in the recesses, and The main idea is to reduce underwater radiated noise by sealing the surface side with a cover rubber and attaching this underwater sound insulating material to the inner and outer surfaces of the hull that come into contact with water using adhesive or the like.
以下添付図面に基いて、この発明の詳細な説明する。 The present invention will be described in detail below based on the accompanying drawings.
第１図は、この発明を実施した水中遮音材１の平面図、
第２図は第１図のｎ−ｎ線に沿う断面図を示し、この水
中遮音材１は、音響ゴムを素材として、３００ｗｓＸ３
００ｗ角の成形ゴム２を成形し、その−側面には仕切り
壁３により区画された複数の凹部４が形成されている。FIG. 1 is a plan view of an underwater sound insulation material 1 embodying the present invention;
FIG. 2 shows a cross-sectional view taken along line nn in FIG.
A 00w square molded rubber 2 is molded, and a plurality of recesses 4 partitioned by partition walls 3 are formed on the lower side thereof.
前記凹部４には、連続気泡または独立気泡の空気層を備
えたスポンジを素材とした遮音材５が埋設され、その表
面側は音響ゴムを素材としたカバーゴム６が気密的及び
水密的に装着されている。A sound insulating material 5 made of sponge having an air layer of open or closed cells is buried in the recess 4, and a cover rubber 6 made of acoustic rubber is attached to the surface thereof in an airtight and watertight manner. has been done.
このように、成形ゴム２に形成された凹部４に、遮音材
５を埋設すると共に、カバーゴム６により密閉すること
により遮音効果を高めることが出来るのである。In this way, by embedding the sound insulating material 5 in the recess 4 formed in the molded rubber 2 and sealing it with the cover rubber 6, the sound insulating effect can be enhanced.
次に、水中遮音材１の実施態様を第３図に基づいて説明
すると、船体７の内、外面に於ける接水面の吃水線下金
面における船殻面８に接着剤等を介して、上記のように
構成された一定の大きさの水中遮音材１を全面に貼付け
て装着する。船体７内の騒音源９より発生した騒音波は
、通常船殻面８より水中Ｗに放射されるが、この発明で
は、上記のように水中遮音材１により遮断され、水中Ｗ
への放射を減少させることが出来るのである。Next, an embodiment of the underwater sound insulating material 1 will be described based on FIG. The underwater sound insulating material 1 of a certain size configured as described above is attached and attached to the entire surface. Noise waves generated from the noise source 9 inside the hull 7 are normally radiated into the underwater W from the hull surface 8, but in this invention, they are blocked by the underwater sound insulation material 1 as described above, and the noise waves are radiated into the underwater W from the hull surface 8.
This allows the radiation to be reduced.
即ち、媒質中を伝播する音波は、固有音響インピーダン
ス（物質密度ρ×音速Ｃ）を異にする物質との境界面に
おいては反射し、透過を減少するものである。That is, a sound wave propagating in a medium is reflected at an interface with a material having a different characteristic acoustic impedance (material density ρ×sound velocity C), and its transmission is reduced.
この性質を利用し、水のρ。、Ｃ６と著しくρ、Ｃを異
にする空気層を、遮音を必要とする面に装備させること
により、遮音効果を高め、また薄層化も可能となる。Using this property, the ρ of water. By equipping the surface that requires sound insulation with an air layer whose ρ and C are significantly different from those of , C6, the sound insulation effect can be enhanced and the layer can be made thinner.
遮音材として鋼板を用いる場合、そのρ、Ｃと水のρ。When using a steel plate as a sound insulating material, its ρ, C and the water’s ρ.
Ｃ０との比は小さいので、薄層では効果が小さく、低周
波域では板厚を大きくとる必要がある。Since the ratio with C0 is small, a thin layer has little effect, and it is necessary to increase the thickness in the low frequency range.
以上のようなことから、成形ゴム２に形成された凹部４
に、連続気泡または独立気泡の空気層を備えた遮音材５
を埋設すると共に、カバーゴム６により密閉することに
より遮音効果を高めることが判明した。From the above, the recess 4 formed in the molded rubber 2
Sound insulation material 5 with an air layer of open cells or closed cells
It has been found that the sound insulation effect can be enhanced by burying the hole and sealing it with the cover rubber 6.
次に第４図は、水中遮音材ｌの遮音効果の定量的実験結
果を示すもので、縦軸に透過損失、横軸に周波数を取り
、厚さ５ｔ、Ｌｏｔ、２０ｔの当該水中遮音材ｌと、従
来の１４．５ｔの水中遮音材（成形ゴムの内部に空洞を
有する物）とを比較した。Next, Fig. 4 shows the quantitative experimental results of the sound insulation effect of the underwater sound insulation material 1. The vertical axis shows the transmission loss, and the horizontal axis shows the frequency. and a conventional 14.5 ton underwater sound insulation material (molded rubber with a cavity inside).
測定方法としては、送波器を遮音材でくるみ感度積を測
定し、遮音材の無い場合との差により透過損失を求めた
。As a measurement method, the transmitter was covered with a sound insulating material and the sensitivity product was measured, and the transmission loss was calculated from the difference from the case without the sound insulating material.
第４図から明らかなように、この発明にかかる水中遮音
材１は、従来品に比べて明らかに良好な効果を示してい
る。As is clear from FIG. 4, the underwater sound insulation material 1 according to the present invention clearly exhibits better effects than conventional products.
この発明は、上記のように成形ゴムの一側面に仕切り壁
で区画された複数の凹部を形成し、この凹部内に複数の
気泡を有する遮音材を埋設すると共に、その表面側をカ
バーゴムにより密閉したため、船体からの放射雑音をを
効に低減させて、遮音効果′を向上させることが出来、
この結果水中を媒体とした通信に於ける受渡妨害も有効
に防止出来る効果がある。This invention forms a plurality of recesses partitioned by partition walls on one side of the molded rubber as described above, embeds a sound insulating material having a plurality of air bubbles in the recesses, and covers the surface side with a cover rubber. Since it is sealed, it is possible to effectively reduce the radiation noise from the hull and improve the sound insulation effect.
As a result, it is possible to effectively prevent transmission interference in communication using underwater as a medium.
また、構成が簡単であるため安価に製作できる効果もあ
る。Furthermore, since the structure is simple, it can be manufactured at low cost.
第１図はこの発明を実施した水中遮音材の平面図、第２
図は第１図のｎ−ｎ矢視断面図、第３図は水中遮音材の
実施態様を示す側面図、第４図は遮音効果の実験結果を
示すグラフ説明図である。
１・・・水中遮音材、２・・・成形ゴム、３・・・仕切
り壁、４・・・凹部、５・・・遮音材、６・・・カバー
ゴム。Figure 1 is a plan view of an underwater sound insulating material embodying this invention;
The drawings are a sectional view taken along the line nn in FIG. 1, FIG. 3 is a side view showing an embodiment of the underwater sound insulation material, and FIG. 4 is a graph explanatory diagram showing the experimental results of the sound insulation effect. DESCRIPTION OF SYMBOLS 1... Underwater sound insulation material, 2... Molded rubber, 3... Partition wall, 4... Recessed part, 5... Sound insulation material, 6... Cover rubber.
Claims (1)
形成し、この凹部内に複数の気泡を有する遮音材を埋設
すると共に、その表面側をカバーゴムにより密閉して成
る水中遮音材。This underwater sound insulation material is made by forming a plurality of recesses partitioned by partition walls on one side of molded rubber, burying a sound insulation material having a plurality of air bubbles in the recesses, and sealing the surface side with a cover rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62016205A JPS63184795A (en) | 1987-01-28 | 1987-01-28 | Underwater sound isolating material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62016205A JPS63184795A (en) | 1987-01-28 | 1987-01-28 | Underwater sound isolating material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63184795A true JPS63184795A (en) | 1988-07-30 |
| JPH0517557B2 JPH0517557B2 (en) | 1993-03-09 |
Family
ID=11910011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62016205A Granted JPS63184795A (en) | 1987-01-28 | 1987-01-28 | Underwater sound isolating material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63184795A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006178266A (en) * | 2004-12-24 | 2006-07-06 | Yokohama Rubber Co Ltd:The | Underwater acoustic material |
-
1987
- 1987-01-28 JP JP62016205A patent/JPS63184795A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006178266A (en) * | 2004-12-24 | 2006-07-06 | Yokohama Rubber Co Ltd:The | Underwater acoustic material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0517557B2 (en) | 1993-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Yoneyama et al. | The audio spotlight: An application of nonlinear interaction of sound waves to a new type of loudspeaker design | |
| US2473971A (en) | Underwater transducer | |
| US4300218A (en) | Free flooding hydrophone mounting | |
| DE3650087T2 (en) | LOUDSPEAKERS SUITABLE FOR USE IN A CORNER. | |
| JPH07507427A (en) | Undersea acoustic antenna with surface sensor | |
| US4450544A (en) | Absorptive sonar baffle | |
| JPS63184795A (en) | Underwater sound isolating material | |
| US2761117A (en) | Directional transducer | |
| US4837751A (en) | Shielded hydrophone assembly | |
| GB1257836A (en) | ||
| CN113359119B (en) | Side-scanning transducer based on circular arc piezoelectric composite material and preparation method thereof | |
| US3601789A (en) | Deep-submergence acoustic array stave | |
| JP3158808B2 (en) | Sound absorbing material | |
| US3368193A (en) | Deep submergence hydrophone | |
| CN215118304U (en) | Combined type sound-proof housing of marine engine | |
| JPH0227670Y2 (en) | ||
| RU2161825C2 (en) | Acoustic coat | |
| GB749930A (en) | Improvements in or relating to transducers | |
| JPS6117668Y2 (en) | ||
| US3868624A (en) | Apparatus for mapping acoustic fields | |
| US3277434A (en) | Transducer pressure release under high environmental pressure | |
| US2831177A (en) | Delay line for hydrophones | |
| JPH0585000B2 (en) | ||
| CN214407753U (en) | Novel bionic vector hydrophone | |
| GB1378121A (en) | Ultrasonic delay line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |