JPS6056040B2 - microphone - Google Patents
microphoneInfo
- Publication number
- JPS6056040B2 JPS6056040B2 JP13136984A JP13136984A JPS6056040B2 JP S6056040 B2 JPS6056040 B2 JP S6056040B2 JP 13136984 A JP13136984 A JP 13136984A JP 13136984 A JP13136984 A JP 13136984A JP S6056040 B2 JPS6056040 B2 JP S6056040B2
- Authority
- JP
- Japan
- Prior art keywords
- microphone
- case
- yoke
- air chamber
- opening
- 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
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
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Description
【発明の詳細な説明】
本発明は指向性のダイナミックタイプのマイクロホンに
関するもので、特性の改善をはかることを目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a directional dynamic type microphone, and aims to improve its characteristics.
第１図は従来のマイクロホンの構造を示したもので、１
は振動板、２は磁石、３は開口４、５を有するヨーク、
６、７は音響抵抗体、 はバックキャビティである。第
２図はこのマイクロホンの特性を示したものである。Figure 1 shows the structure of a conventional microphone.
is a diaphragm, 2 is a magnet, 3 is a yoke having openings 4 and 5,
6 and 7 are acoustic resistors, and are a back cavity. FIG. 2 shows the characteristics of this microphone.
この特性図から明らかなように指向性は狭い周波数帯域
しか満足できないが、開孔５を第３図のように５１、５
２とし、さらに音響抵抗体７を７１、７２とすることに
より第４図のような特性が得られる。この場合には第１
図のものに比べ低域において指向性が改善されるが、高
域の指向性は不充分である。As is clear from this characteristic diagram, the directivity can only be satisfied in a narrow frequency band.
2, and furthermore, by setting the acoustic resistors 7 to 71 and 72, the characteristics as shown in FIG. 4 can be obtained. In this case, the first
Although the directivity in the low range is improved compared to the one shown in the figure, the directivity in the high range is insufficient.
本発明はこのような欠点を除去したもので、以下第５図
の一実施例とともに説明する。The present invention eliminates these drawbacks and will be described below with reference to an embodiment of FIG.
同図において１〜４、６、８、５１、５２、７１、７２
はそれぞれ第３図における同符号のものに対応する。In the same figure, 1 to 4, 6, 8, 51, 52, 71, 72
correspond to the same reference numerals in FIG. 3, respectively.
９はボ、イスコイル１１の下部を密閉し、気室１２を形
成する非磁性材からなるキャビティケース、１０は開口
である。9 is a cavity case made of a non-magnetic material that seals the lower part of the coil 11 and forms an air chamber 12; 10 is an opening.
第６図はその特性を示したものて破線は気室１２の容積
が小さすぎる場合を示す。FIG. 6 shows the characteristics, and the broken line shows the case where the volume of the air chamber 12 is too small.
すなわちこのマイクロホンは振動板１の背面に気室１２
を設けた点を特徴とするものである。In other words, this microphone has an air chamber 12 on the back of the diaphragm 1.
It is characterized by the provision of.
この場合、気室１２の容積は適当に設定すれば第６図の
ように１８００の特性においてディップが生じ、指向特
性の改善が図れる。なおこのディップは容積により変化
するためにこれを生ずるような設定が必要になる。In this case, if the volume of the air chamber 12 is set appropriately, a dip will occur in the characteristic of 1800 as shown in FIG. 6, and the directivity characteristic can be improved. Note that since this dip changes depending on the volume, settings must be made to produce this dip.
以上実施例により説明したが本発明によれば特に高域で
の特性改善に寄与できる。As described above with reference to the embodiments, the present invention can contribute to improving characteristics particularly in high frequencies.
第１図および第３図は従来のマイクロホンの断面図、第
２図および第４図はその特性図、第５図は本発明の一実
施例におけるマイクロホンの断面図、第６図はその特性
図てある。
２・・・・・・磁石、３・・・・・・ヨーク、９・・・
・・・キャビティケース、１０・・・・・・開口、１１
・・・・・・ボイスコイル、７１、７２・・・・・・音
響抵抗体。Figures 1 and 3 are cross-sectional views of a conventional microphone, Figures 2 and 4 are its characteristic diagrams, Figure 5 is a cross-sectional view of a microphone according to an embodiment of the present invention, and Figure 6 is its characteristic diagram. There is. 2...Magnet, 3...Yoke, 9...
...Cavity case, 10...Opening, 11
...Voice coil, 71, 72...Acoustic resistor.
Claims (1)
口を設けると共にボイスコイルの位置する下方を密閉し
、独立した気室を形成するキャビティケースを設け、か
つ振動板のエッジ部下にヨーク内に通ずる開口を設けた
マイクロホン。1 An opening leading to the acoustic resistor is provided in the yoke that also serves as the outer peripheral case, a cavity case is provided that seals the lower part where the voice coil is located and forms an independent air chamber, and an opening is provided below the edge of the diaphragm that leads into the yoke. A microphone equipped with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13136984A JPS6056040B2 (en) | 1984-06-26 | 1984-06-26 | microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13136984A JPS6056040B2 (en) | 1984-06-26 | 1984-06-26 | microphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6022896A JPS6022896A (en) | 1985-02-05 |
| JPS6056040B2 true JPS6056040B2 (en) | 1985-12-07 |
Family
ID=15056318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13136984A Expired JPS6056040B2 (en) | 1984-06-26 | 1984-06-26 | microphone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6056040B2 (en) |
-
1984
- 1984-06-26 JP JP13136984A patent/JPS6056040B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6022896A (en) | 1985-02-05 |
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