JPS595799A - Vibration-resistant microphone - Google Patents
Vibration-resistant microphoneInfo
- Publication number
- JPS595799A JPS595799A JP11250882A JP11250882A JPS595799A JP S595799 A JPS595799 A JP S595799A JP 11250882 A JP11250882 A JP 11250882A JP 11250882 A JP11250882 A JP 11250882A JP S595799 A JPS595799 A JP S595799A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- diaphragms
- amplifier
- enclosure
- oscillations
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
Description
【発明の詳細な説明】 きれる装置に最適なマイクロホンに関するものである。[Detailed description of the invention] This article concerns microphones that are most suitable for use in devices that can be
従来、振動が多い環境にて使用されるマイクロホンは第
1図に示すようにスポンジゴム等、緩衝材料2を用いて
マイクロホンlを浮かして取付けるもの、あるいは第2
図に示すようにバネとダンパー6を組合せて、マイクロ
ホンの振動板の共振周波数に近い周波数の振動を吸収す
るものなどがあった。なお、両図において3は振動が多
いマイクロホンの取付部、4はマイクロホンの出力、5
はマイクロホンの支持物である。Conventionally, microphones used in environments with a lot of vibration have been mounted by floating the microphone l using a cushioning material 2 such as sponge rubber, as shown in Fig.
As shown in the figure, there is one that combines a spring and a damper 6 to absorb vibrations at a frequency close to the resonance frequency of the microphone's diaphragm. In both figures, 3 is the mounting part of the microphone that vibrates a lot, 4 is the output of the microphone, and 5
is the support for the microphone.
しかしながらこれらはいずれも形状が大きく、緩衝材料
やバネ、ダンパーの吸収する振動の周波数が不安定であ
るとか、構造上、微妙であり又、衝撃にて特性が変化し
た9破損を招く等の欠点があった。斐に、この1s衝材
料は経時変化が大きいため定期交換あるいは再調整が必
要であるという欠点があった。However, all of these have drawbacks such as large shapes, unstable frequencies of vibrations absorbed by cushioning materials, springs, and dampers, delicate structures, and changes in characteristics due to impact, which can lead to damage. was there. However, this 1s damping material has a drawback in that it is subject to large changes over time and requires periodic replacement or readjustment.
本発明の目的はこれらの欠点を除去するため、従来のよ
うに振動が筐体を伝導して振動板にTs動されるのを防
ぐ方法によるものではなく、伝わった振動を打消す方法
を採用したものである。即ち、二枚の振動板を同一筐体
内に各々隔離されて設けることにより、二枚の振動板に
伝わる振動?よほぼ同位相、同レベルであるので、後段
の増幅響において、逆位相にて増幅すれば、それら振動
による出力は打消し合い、また片方の振動板を音響的に
遮蔽することにより、正規の音響振動は打消されずに増
幅されるようにしたものであり以下詳細に説明する。In order to eliminate these drawbacks, the purpose of the present invention is to adopt a method of canceling the transmitted vibrations, rather than the conventional method of preventing vibrations from being transmitted to the diaphragm by transmitting them to the diaphragm. This is what I did. In other words, by providing two diaphragms in isolation within the same housing, the vibration transmitted to the two diaphragms? Since they are almost in phase and at the same level, if they are amplified in opposite phases in the subsequent amplification stage, the outputs of these vibrations will cancel each other out, and by acoustically shielding one of the diaphragms, the normal The acoustic vibrations are amplified without being canceled out, and will be explained in detail below.
第3図は本発明の第1の実施例で、7は音響振動と筐体
を伝わった振動の両方に感じる振動板、8は後者の振動
のみに感じる振動板である。9は差動増幅晋で7.8の
振動板より誘起した信号の差の成分を増幅するもとであ
る。FIG. 3 shows a first embodiment of the present invention, where 7 is a diaphragm that is sensitive to both acoustic vibrations and vibrations transmitted through the housing, and 8 is a diaphragm that is sensitive to only the latter vibration. 9 is a differential amplification element which amplifies the difference component of the signal induced from the diaphragm 7.8.
ここで、振動が多いマイクリホン取付部3から筺体11
を゛伝わった振動は再振動板7.8に同じレベルで、か
つ同じ位相で印加される。そして再振動板7.8より誘
起した電気出力4.4′も同じレベル、同じ位相となり
、増幅@9が差の成分のみ増幅するものであるので、筐
体振動成分は増[@l!9の出力10には表われない。Here, from the microphone mounting part 3 where there is a lot of vibration to the housing 11.
The vibrations transmitted through are applied to the re-diaphragm 7.8 at the same level and in the same phase. The electrical output 4.4' induced by the re-diaphragm 7.8 also has the same level and phase, and since the amplification@9 amplifies only the difference component, the casing vibration component increases [@l! It does not appear in the output 10 of 9.
一方振動板7の前方にはマイクロホン筺体11に導音孔
12を設けてあり、振動板7は音響振動に対しても感じ
る事ができるが、振動板8は対応する導音孔がないので
音響振動に対しては感じない。従って、音響振動に対し
ては振動板7の出力4のみであるので増幅響9にて差の
成分を増幅しても、該音響振動は打消されず出力10に
表われることになる。On the other hand, a sound guide hole 12 is provided in the microphone housing 11 in front of the diaphragm 7, and the diaphragm 7 can also feel acoustic vibrations, but the diaphragm 8 does not have a corresponding sound guide hole, so I don't feel any vibrations. Therefore, since only the output 4 of the diaphragm 7 responds to acoustic vibrations, even if the difference component is amplified by the amplifier 9, the acoustic vibrations will not be canceled and will appear in the output 10.
す上説明したように本発明の第1の実施例では従来の如
く、特別な防振メカニズム等が不要であるので、小形、
単純製造容易であり、木質的にスポンジゴムやバネ、ダ
ンパーなどの経時変化の大きいlI衛材料に特性を依存
しないので長期に互い、安定な特性を得る事ができろ。As explained above, the first embodiment of the present invention does not require a special anti-vibration mechanism as in the prior art, so it is compact and
It is simple and easy to manufacture, and its properties do not depend on wooden materials that change significantly over time, such as sponge rubber, springs, and dampers, so it can provide stable properties over a long period of time.
次に本発明に係る第2の実施例を説明する。第4図は本
発明の第2の実施例を示す説明図であり、第3図と同符
号は同一構成要素を示す。Next, a second embodiment of the present invention will be described. FIG. 4 is an explanatory diagram showing a second embodiment of the present invention, and the same reference numerals as in FIG. 3 indicate the same components.
前記第1の実施例は同一のマイクロホン筐体に、二枚の
振動板を収容したものであるが、第2の実施例は第4図
に示すようにそれらを各々別のマイクロホン筐体に収容
したものである。即ち、独立のマイクロホン1.1′を
二個使用し、さらに筺13の中に近接して配置しその一
個は導音孔12を設け、他の一個は導音孔を設けない構
成としても第1の実施例と同様の効果を得ることができ
る。In the first embodiment, two diaphragms are housed in the same microphone housing, but in the second embodiment, they are housed in separate microphone housings, as shown in FIG. This is what I did. That is, it is also possible to use two independent microphones 1.1' and arrange them close to each other in the housing 13, one of which is provided with the sound guide hole 12 and the other with no sound guide hole. The same effects as in the first embodiment can be obtained.
以上詳細に説明したように、本発明は筐体を伝わる振動
を打消し音響振動のみを取り出す事ができるので車載機
器のように振動が多い環境でかつできるかぎり小形にし
なければならない場合、また、電話機の送受話−のよう
に床に落下させても破損しない高い信頼性を要求される
場合に最適のマイクロホンを得ることができる。As explained in detail above, the present invention can cancel the vibrations transmitted through the casing and extract only the acoustic vibrations. This makes it possible to obtain a microphone that is most suitable for applications that require high reliability that will not be damaged even if dropped on the floor, such as when transmitting and receiving calls using a telephone.
第1図、第2図は従来の耐振動マイクロホンの説明図、
第3図は本発明の第1の実施例の説明図、第4図は本発
明の他の実施例の説明図である。
1 マイクロホン、 7.8 振動板、 11マイク
ロホン筐体、 12 導音孔、13 マイクロホンを組
込む筐体、 9 ・差動増幅鮒特許出願人 沖電気工
業株式会社
代 理 人 鈴 木 敏 明
第1図
第2図
第3図
1
第4図Figures 1 and 2 are explanatory diagrams of conventional vibration-resistant microphones.
FIG. 3 is an explanatory diagram of the first embodiment of the invention, and FIG. 4 is an explanatory diagram of another embodiment of the invention. 1 microphone, 7.8 diaphragm, 11 microphone casing, 12 sound guide hole, 13 casing into which the microphone is incorporated, 9 ・Differential amplification carp patent applicant Oki Electric Industry Co., Ltd. Agent Toshiaki Suzuki Figure 1 Figure 2 Figure 3 Figure 1 Figure 4
Claims (2)
け、両振動板の出力の差成分を増幅する差動増暢響を設
け、更に、前記筐体には一方の振動板に対してのみ導音
孔を設けることによ#)葭一方の振動板に筐体振動と音
響振動を感動させ、他方の振動板には筐体振動のみ感動
させたことを特徴とする耐振動マイクロホン。(1) Two diaphragms are provided in the same housing so as to be isolated from each other, and a differential amplification system is provided to amplify the difference component between the outputs of both diaphragms. A vibration-resistant microphone characterized in that by providing a sound guide hole only for the diaphragm, one diaphragm is affected by the casing vibration and acoustic vibration, and the other diaphragm is affected only by the casing vibration. .
とを特徴とする特許請求の範囲概1項記載のWI4I!
動マイクロホン。(2) WI4I according to Claim 1, characterized in that each independent microphone is used as a diaphragm!
moving microphone.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11250882A JPS595799A (en) | 1982-07-01 | 1982-07-01 | Vibration-resistant microphone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11250882A JPS595799A (en) | 1982-07-01 | 1982-07-01 | Vibration-resistant microphone |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS595799A true JPS595799A (en) | 1984-01-12 |
Family
ID=14588398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11250882A Pending JPS595799A (en) | 1982-07-01 | 1982-07-01 | Vibration-resistant microphone |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS595799A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0246500U (en) * | 1988-09-27 | 1990-03-29 | ||
JPH02301692A (en) * | 1989-05-17 | 1990-12-13 | Ngk Insulators Ltd | Liquid sealed pump |
JPH0329499A (en) * | 1989-06-26 | 1991-02-07 | Agency Of Ind Science & Technol | Static condenser type microphone |
EP0629995A1 (en) * | 1989-03-01 | 1994-12-21 | Sony Corporation | Noise reducing receiver device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5726184B2 (en) * | 1977-09-09 | 1982-06-03 |
-
1982
- 1982-07-01 JP JP11250882A patent/JPS595799A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5726184B2 (en) * | 1977-09-09 | 1982-06-03 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0246500U (en) * | 1988-09-27 | 1990-03-29 | ||
EP0629995A1 (en) * | 1989-03-01 | 1994-12-21 | Sony Corporation | Noise reducing receiver device |
JPH02301692A (en) * | 1989-05-17 | 1990-12-13 | Ngk Insulators Ltd | Liquid sealed pump |
JPH0329499A (en) * | 1989-06-26 | 1991-02-07 | Agency Of Ind Science & Technol | Static condenser type microphone |
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