JPS6046700A - Suspended type low noise receiver - Google Patents
Suspended type low noise receiverInfo
- Publication number
- JPS6046700A JPS6046700A JP15408683A JP15408683A JPS6046700A JP S6046700 A JPS6046700 A JP S6046700A JP 15408683 A JP15408683 A JP 15408683A JP 15408683 A JP15408683 A JP 15408683A JP S6046700 A JPS6046700 A JP S6046700A
- Authority
- JP
- Japan
- Prior art keywords
- mass
- mass damper
- damper
- receiver
- rigid
- 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
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
- G10K11/006—Transducer mounting in underwater equipment, e.g. sonobuoys
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はマスダンパーを用いたｌ′Ｄ下型低雑音受波器
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an L'D lower type low noise receiver using a mass damper.
船舶や海１ｎ１にｌ′Ｙべたフロート等から水中に吊下
して水中音を計測するω下型受波器においては、波浪等
によるフロート等の動揺が受波器に伝達されて、いわゆ
る自己雑音が発生する。In the ω-lower type receiver, which measures underwater sound by suspending it underwater from a ship or a l'Y flat float in the sea, the vibration of the float due to waves, etc. is transmitted to the receiver, and the so-called self-reflection occurs. Noise occurs.
そこで、このような自己雑音を防止するため、従来は第
１図に示すようにフレームと該フレームの外周を覆う布
とで４］１４成される軟性のマスダンパー１をゴムｖＪ
′−η・により形成された＋１’ｌ ’−１’紐２で吊
下支持すると共に、σスダンパー１内に受波器３を配設
した低周波防振型受波器が使用されている。Therefore, in order to prevent such self-noise, conventionally, as shown in FIG.
A low-frequency vibration-isolated wave receiver is used, which is suspended and supported by a +1'l '-1' string 2 formed by '-η', and a wave receiver 3 is disposed within a σ damper 1. .
この低周波防振型受波器は、、前記軟性のマスダンパー
１をＭａ ｓ ｓ とし、ゴム材によるｔｉｔＴ紐２を
コンプライアンスとして低周波防振を行ったものである
が、これによると、前記の如くマスダンパ＝１がフレー
ムと布とで構成される軟性のものであるため、揚収時や
船上に置いた時等にぶつけて破損し易いという欠点があ
り、取扱いが非常に困つ−１［であった。This low-frequency vibration-isolated receiver uses the soft mass damper 1 as Mass damper and uses the titT string 2 made of rubber material as compliance to perform low-frequency vibration isolation. As shown in Figure 1, the mass damper = 1 is a soft material consisting of a frame and cloth, so it has the disadvantage of being easily damaged by being hit during recovery or when placed on a ship, making it extremely difficult to handle. [Met.
また、取扱い性をよくするため、剛性のマスダンパーを
使用することが考えられるが、従来の剛性のマスダンパ
ーでは、内部に水を出入させるだめの通水孔とマスダン
パー内の容積によシヘルムポルッ共１１（ｂ器が構成さ
れて、動揺による自己発生雑音がかえって高くなるとい
う欠点があった。Additionally, in order to improve handling, it may be possible to use a rigid mass damper, but conventional rigid mass dampers have a water hole that allows water to enter and exit the interior, and a volume inside the mass damper. Both had the disadvantage that the self-generated noise caused by the vibration became high because it was configured as a 11 (b) unit.
本発明はこれらの欠点を解決することのできる最下型低
雑音受波器を得ることを目的とし、そのため一端を開放
した剛性のマスダンパー内に受波器を配設することによ
り、取扱い性を向上させると共に、自己発生雑音を低下
させるようにしたことを特徴とする。The purpose of the present invention is to obtain a bottom-type low-noise receiver that can solve these drawbacks, and for this purpose, the receiver is placed inside a rigid mass damper with one end open, thereby improving ease of handling. It is characterized in that it improves the noise level and reduces self-generated noise.
以］Ｊ図面により説明すると、第２図は本発明の一実施
例を示す斜視図で、図において４は水中で良好な音響透
過性が得られる剛性のマスダンパーで、ブラヌチック等
によって形成してあり、その構造は中糸円柱体の底（痘
を取除いて一輻；開放とした構造となっている。] Figure 2 is a perspective view showing one embodiment of the present invention, and in the figure, 4 is a rigid mass damper that can obtain good acoustic transparency underwater, and is made of Blanutik or the like. The structure is that of a mesocylindrical body (with the pox removed and one end open).
本実施例は、このマスダンパー４をゴム材ニヨるｌＩｌ
下紐２で１′１１下支持すると共に、その内部に受波器
３を配置し、さらにマスダンパー４の下部に重り５を取
伺けて構成したもので、マスダンパー４内の水のａη１
及びマスダンパー４と一緒に動く水の質量（伺加Ｍａｓ
ｓ ）及び重り５をＭ ａ ｓ ｓとし、ゴム紐２をコ
ンプライアンスとして低周波防振を行ったものである。In this embodiment, this mass damper 4 is made of rubber material.
The lower string 2 supports the lower part 1'11, a receiver 3 is placed inside the lower string 2, and a weight 5 is attached to the lower part of the mass damper 4.
and the mass of water moving together with the mass damper 4 (Kika Mas
s) and the weight 5 are M as s, and the rubber string 2 is used as compliance to perform low frequency vibration isolation.
１１’ｌ下型受波器において、軟性のマスダンパーを使
用した場合、防振系の共振周波数ｆ。は、町・・マスダ
ンパ一部（重りを含む）の質量１】１２・含水質ｌ（マ
スダンパー内の水の質量）ｍ５・・形状による付加Ｍａ
ｓ ｓ
の式において４１ｍ２は
Ｉｎ２ニー几う Ｒ１１，マスダンパーの半径の実験式
が導びかれているが、剛性のマスダンパーを１月いて実
験した結果、
ｌｎ２ 〒 １／１．５Ｒう
程度となり、軟性のマスダンパーよりも小形な構造で低
周波防振を実現できる。そして第２図に示す本発明のよ
うに低板を取除いた構造の剛性のマスダンパー４の場合
でも、共振周波数に全く変わりはなかった。When using a soft mass damper in a 11'l lower type receiver, the resonance frequency f of the vibration isolation system. is the mass of part of the mass damper (including weight) 1] 12. Water content l (mass of water in the mass damper) m5... Additional Ma due to shape
In the formula for s s , 41 m2 is In2 knee R11, and an experimental formula for the radius of the mass damper has been derived, but as a result of an experiment with a rigid mass damper, it is about ln2 〒 1/1.5R. , it is possible to achieve low frequency vibration isolation with a smaller structure than a soft mass damper. Even in the case of the rigid mass damper 4 of the present invention shown in FIG. 2, which has a structure in which the lower plate is removed, there was no change in the resonance frequency at all.
第３図は本発明と従来例とを比較した特性図で、波高２
．４ ｍ 、 ０．１５ Ｈｚで受波器を上下動させた
対波浪モデル実験の自己発生雑音分析例を示している。Figure 3 is a characteristic diagram comparing the present invention and the conventional example.
．． An example of self-generated noise analysis of a wave model experiment in which the receiver was moved up and down at 4 m and 0.15 Hz is shown.
この図から明らかなようにマスダンパーが底板付の場合
は自己雑音に雑音ピークが生じて、雑音レベルが高いが
、本発明のように底板を取除いて一端開放にした場合は
ほぼ全周波数に対して自己肩（音が約２０ｄＢ程度低い
、また、底板付の場合は揚収時にマスダンパー内部の水
を抜くために長時間必要となるが、一端開放の場合はマ
スダンパー内部に水が残ることはない。即ち小形で低周
波防振が１」」能であると共に、揚収作業時等の取扱い
が容易で低雑畠゛の吊下型受波器を実現できる。As is clear from this figure, when the mass damper has a bottom plate, a noise peak occurs in the self-noise and the noise level is high, but when the bottom plate is removed and one end is left open as in the present invention, almost all frequencies are On the other hand, the sound level is about 20 dB lower, and if it is equipped with a bottom plate, it will take a long time to drain the water inside the mass damper during lifting, but if one end is open, water will remain inside the mass damper. In other words, it is possible to realize a hanging type receiver that is small, has excellent low-frequency vibration isolation, is easy to handle during lifting and retrieval work, and has low clutter.
尚、上述した実施例は、ＩＣ■■の受波器について説明
をしたが、第４図に示すように１１１下紐２、受波器３
、剛性のマスダンパー４及び重り５から成る構成物を複
数連結して多Ｃｌ（の受波器アレイとしても同様の効果
を得ることができる。In the above embodiment, the receiver of IC ■■ was explained, but as shown in FIG.
, a rigid mass damper 4 and a weight 5 can be connected to form a multi-Cl receiver array to obtain the same effect.
思」二説明したように本発明は、一端開放とした剛性の
マスダンパー内に受波器を配設した構造としているため
、収扱い性がよく、かつ自己雑音の発生が低い受波器を
実現することができる。As explained above, the present invention has a structure in which the receiver is disposed inside a rigid mass damper with one end open, so it is easy to handle and produces a receiver with low self-noise. It can be realized.
第１図は従来の１１３下型受波器を示す斜視図、第２図
は本発明の一実施例を示す斜視図、第３図は本発明と従
来例とを比較した特性図、第４図は本発明の他の実施例
を示す斜視図である。
２・・・１１１丁紐 ３・・・受波器 ４・・・剛性の
マスダンパー ５・・・屯り
楯１−
輪３ 匡
周波数 □
（Ｈ／、）FIG. 1 is a perspective view showing a conventional 113 lower type receiver, FIG. 2 is a perspective view showing an embodiment of the present invention, FIG. 3 is a characteristic diagram comparing the present invention and a conventional example, and FIG. The figure is a perspective view showing another embodiment of the present invention. 2...111 string 3...Receiver 4...Rigid mass damper 5...Top shield 1- Wheel 3 Box frequency □ (H/,)
Claims (1)
゛７ｊ徴とする吊下型低雑音受波器。1. Having a rigid mass damper with one end open 4.
A hanging low-noise receiver with the characteristics of ゛7j.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15408683A JPS6046700A (en) | 1983-08-25 | 1983-08-25 | Suspended type low noise receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15408683A JPS6046700A (en) | 1983-08-25 | 1983-08-25 | Suspended type low noise receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6046700A true JPS6046700A (en) | 1985-03-13 |
| JPS6362958B2 JPS6362958B2 (en) | 1988-12-05 |
Family
ID=15576583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15408683A Granted JPS6046700A (en) | 1983-08-25 | 1983-08-25 | Suspended type low noise receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6046700A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387924A (en) * | 2015-12-31 | 2016-03-09 | 中国人民解放军国防科学技术大学 | Fiber optic vector hydrophone with posture self-correcting function |
-
1983
- 1983-08-25 JP JP15408683A patent/JPS6046700A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387924A (en) * | 2015-12-31 | 2016-03-09 | 中国人民解放军国防科学技术大学 | Fiber optic vector hydrophone with posture self-correcting function |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6362958B2 (en) | 1988-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101090582B (en) | Loudspeaker system and loudspeaker enclosure | |
| US9330642B2 (en) | Weighted, gripping drum pillow | |
| CA2084787A1 (en) | Loudspeakers | |
| US4111094A (en) | Rhythm instrument | |
| JPS6046700A (en) | Suspended type low noise receiver | |
| FR2604845B1 (en) | ELECTRO-ACOUSTIC TRANSDUCER | |
| US5054356A (en) | Guitar | |
| US6563033B1 (en) | Stringed musical instrument with apparatus enhancing low frequency sounds | |
| CN209402723U (en) | A kind of bone-conduction speaker | |
| FABER | Origin and conduction of the mitral sound in the heart | |
| Hutchins | A study of the cavity resonances of a violin and their effects on its tone and playing qualities | |
| US5594190A (en) | Method of supporting handbells on an inflated table covering pad | |
| Toboonchuay et al. | Thai fiddle saw-u modeled as a Helmholtz resonator with circular membrane | |
| CN106454624A (en) | Sound box component, sound box and display equipment | |
| JP3965120B2 (en) | Enclosure and audiovisual apparatus including the enclosure | |
| US11568847B2 (en) | Full frequency acoustic system and method of use | |
| CN212176729U (en) | Formula recording studio is accomodate at top | |
| JPH0544777A (en) | Vibration absorber | |
| CN203858851U (en) | Violin pronunciation auxiliary device | |
| Goodfellow et al. | Apparatus for receiving speech through the sense of touch | |
| Firth | Modal analysis of the air cavity of the violin | |
| SU838029A1 (en) | Resonance-type absorber | |
| CN107948887A (en) | Loudspeaker enclosure | |
| JPS5819907Y2 (en) | Vibration pickup microphone | |
| US4142186A (en) | Means for improving the electroacoustical properties of a buzzer |