JPS63232798A - Microphone unit - Google Patents
Microphone unitInfo
- Publication number
- JPS63232798A JPS63232798A JP6637887A JP6637887A JPS63232798A JP S63232798 A JPS63232798 A JP S63232798A JP 6637887 A JP6637887 A JP 6637887A JP 6637887 A JP6637887 A JP 6637887A JP S63232798 A JPS63232798 A JP S63232798A
- Authority
- JP
- Japan
- Prior art keywords
- microphone unit
- holder
- sound
- microphone
- sound hole
- 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
- 239000000126 substance Substances 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 17
- 230000035945 sensitivity Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は電話機等の通信機器又は、拡声分野等において
１周囲騒音の除去、もしくはハウリングマージンの改善
等に効果を有するマイクロホンユニットに関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a microphone unit that is effective in eliminating ambient noise or improving howling margin in communication equipment such as telephones or in the field of sound reinforcement.
従来の技術
従来、この種のマイクロホンとしては差動型マイクロホ
ンを用い、その指向性及び近接効果を利用することが知
られている。2. Description of the Related Art Conventionally, it has been known to use a differential microphone as this type of microphone, and utilize its directivity and proximity effect.
第１０図は、電話機用ハンドセントに用いた場合の従来
のマイクロホンの構成例を示す。同図（ａ）において、
１はハンドセット、２は送話側、３は受話側であり、（
ｂ）はその受話側３０部分拡拡大面図である。マイクロ
ホンユニット４は接話型もしくは単−指向性型等の差動
型マイクロホンユニットであり、その前部Ｃ及び背部り
への音導のため。FIG. 10 shows an example of the configuration of a conventional microphone used in a telephone handpiece. In the same figure (a),
1 is the handset, 2 is the transmitting side, 3 is the receiving side, (
b) is a partially enlarged sectional view of the receiving side 30. The microphone unit 4 is a differential type microphone unit such as a close-talk type or a unidirectional type, and is used to guide sound to the front part C and the back part.
音孔２ａ、２ｂが設けられている。Sound holes 2a and 2b are provided.
差動型マイクロホンユニット４は周知の如く、振動板の
前部Ｃ１背部りへの音圧差１位相差を利用し、指向性及
び近接効果を得るものである。従って、前部Ｃ及び背部
りへの音導が必要であり。As is well known, the differential microphone unit 4 utilizes a one-phase difference in sound pressure between the front part C1 and the back part of the diaphragm to obtain directivity and a proximity effect. Therefore, it is necessary to conduct sound to the front part C and the back part.
その効果を充分発揮するためには第１０図（ａ）、 （
ｂ）の如＜、Ａ面、０面等に複数個の音孔２ａ、２ｂ等
を極力多数設け１位相の乱れ等を少なくする必要がある
。In order to fully demonstrate its effect, Figure 10 (a), (
As in b), it is necessary to provide as many sound holes 2a, 2b, etc. as possible on the A side, 0 side, etc. to reduce disturbances in one phase.
この様に構成した上記従来例のハンドセットではマイク
ロホンユニット４０指向性及び近接効果により１周囲騒
音の除去もしくは、ハウリングマージンの改善を行なう
ことができる。以上の従来例においてはハンドセントを
用いた例について述べているが、ハンドマイクロホン等
の場合についても同様なことが言える。In the conventional handset configured in this manner, it is possible to eliminate one ambient noise or improve the howling margin by the directivity of the microphone unit 40 and the proximity effect. In the above conventional example, an example using a handheld microphone is described, but the same can be said for the case of a handheld microphone, etc.
発明が解決しようとする問題点
しかしながら、上記従来例のハンドセットでは必ず音孔
を複数面に設ける必要があり、デザイン上の制約を受け
るため５その効果が充分発揮できなかったり、又、一般
の無指向性マイクロホン用のハンドセットと金型の共用
が難しいという問題があった。又、複数面に音孔を有す
るため１手で塞ぐ等による遮音が不可能である。Problems to be Solved by the Invention However, in the above-mentioned conventional handsets, it is necessary to provide sound holes on multiple sides, which is subject to design constraints. There was a problem in that it was difficult to share the handset and mold for directional microphones. Furthermore, since the sound holes are provided on multiple sides, it is impossible to insulate the sound by closing them with one hand.
本発明はこの様な従来の問題を解決するものであり、デ
ザイン上の制約を排除し１周囲騒音の除去もしくはハウ
リングマージンの改善等に効果を有する優れたマイクロ
ホンを提供することを目的とする。The present invention solves these conventional problems, and aims to provide an excellent microphone that eliminates design constraints and is effective in eliminating ambient noise and improving howling margin.
問題点を解決するための手段
本発明は上記目的を達成するために、凹状のボルダ−内
に差動型マイクロホンユニットを構成し。Means for Solving the Problems In order to achieve the above object, the present invention configures a differential microphone unit within a concave boulder.
このマイクロホンの前部及び背部への音導を前記ホルダ
ーの上部開孔部側に同−開孔部となる様に構成したもの
である。Sound conduction to the front and back portions of the microphone is configured such that the same openings are located on the side of the upper opening of the holder.
作 用
従って１本発明によれば、差動型マイクロホンユニット
への音導用音孔の構成を単一面とすることができるので
一般に用いられる無指向性マイクロホン用ハンドセット
等の筐体と金型の共用等が可能であ、す、デザイン上の
制約を排除することができると共に１手等で塞いだ時の
遮音も可能であるという効果を有する。Therefore, according to the present invention, the structure of the sound guiding holes in the differential microphone unit can be made into a single surface, so that the housing and mold of a generally used omnidirectional microphone handset etc. can be formed. It has the effect of being able to be shared, eliminating design constraints, and also being able to block the sound when it is closed with one hand.
実施例
第１図（ａ）、 （ｂ）は本発明の一実施例を示す図で
ある。同図において６は凹状のホルダーであり、このホ
ルダー６の中央付近に差動型マイクロホンユニット４が
水平の軸方向に構成され、前部Ｃへの音孔６ａ及び背部
りへの音孔６ｂがホルダー６の上部開孔部側に設けられ
ている。Embodiment FIGS. 1(a) and 1(b) are diagrams showing an embodiment of the present invention. In the same figure, 6 is a concave holder, and a differential microphone unit 4 is arranged in the horizontal axial direction near the center of this holder 6, and a sound hole 6a to the front part C and a sound hole 6b to the back part are provided. It is provided on the upper opening side of the holder 6.
以上の如く構成した場合、音孔５ａ、５ｂはホルダー６
の同一面側となっているが、差動型マイクロホンユニッ
ト４により、各々仕切られた音導となっており、かつホ
ルダー５の寸法もそれほど大きくならないため、実用帯
域内での定在波等の影響等も小さいので位相の乱れ等を
生じにくい。When configured as above, the sound holes 5a and 5b are connected to the holder 6.
However, the sound is guided separately by the differential microphone unit 4, and the size of the holder 5 is not too large, so standing waves etc. within the practical band can be avoided. Since the influence etc. is small, phase disturbance etc. are less likely to occur.
従って、差動型マイクロホンユニット４の単体に近い特
性を得ることができる。Therefore, characteristics close to those of the differential microphone unit 4 alone can be obtained.
実験によれば、高域特性への影響はホルダー６のＥ部付
近の形状が大きいことがわかった。従って実施例では前
部Ｃ側より背部り側を少し広くシ。According to experiments, it has been found that the shape of the holder 6 near the E section has a large influence on the high frequency characteristics. Therefore, in the embodiment, the back side is slightly wider than the front C side.
アールを大きくしているが、多少の違いがあってもよい
。又、前部Ｃと背部りがマイクロホンユニット４により
完全に仕切られていなくても基本的特性は得られる。Although the radius is increased, there may be some difference. Moreover, even if the front part C and the back part are not completely partitioned by the microphone unit 4, the basic characteristics can be obtained.
第２図は第１図のマイクロホンをハンドセット１に取り
付けた場合の送話部２０部分拡拡大面図である。FIG. 2 is a partially enlarged sectional view of the transmitting section 20 when the microphone shown in FIG. 1 is attached to the handset 1.
第３図は本実施例における接話型マイクロホンユニット
を用いた場合の周波数特性例である。同図の如く、指向
性１周波数特性例充分実用的であり１周囲騒音の除去及
びハウリングマージンの改善に充分な効果が得られる。FIG. 3 shows an example of frequency characteristics when the close-talk type microphone unit in this embodiment is used. As shown in the figure, the example of the directional one-frequency characteristic is sufficiently practical, and sufficient effects can be obtained in removing ambient noise and improving the howling margin.
第１図の構成でも充分な効果は得られるが、電話機の場
合、一般的に口元からマイクロホンまでの距離１は２〜
３α程度であり、接話マイクロホンの性質上、距離ｌが
遠くなると感度の低下１周波数特性の変化が生じやすい
。この影響を少なくするためには、マイクロホンの前部
音孔と背部音孔の距離ｄを大きくすることが考えられ、
１／ｄ≦０．５〜２程度とすることが望、ましい。Although a sufficient effect can be obtained with the configuration shown in Figure 1, in the case of a telephone, the distance 1 from the mouth to the microphone is generally 2 to 2.
3α, and due to the nature of close-talking microphones, as the distance 1 increases, sensitivity decreases and frequency characteristics tend to change. In order to reduce this effect, it is possible to increase the distance d between the front sound hole and the back sound hole of the microphone.
It is desirable that 1/d≦0.5 to about 2.
第４図（ａ）、 （ｂ３は本発明の他の実施例であり、
第１図との違いは差動型マイクロホンユニット４の上部
にプレート６を構成し、距離ｄが大きくなる様、構成し
ている点である。つまり、Ｉ／ｄを極力１程度以下とな
る様にしているため、近接効果が大きく、さらに感度を
高くできると共に、距離による感度変化１周波数特性変
化を小さくすることが可能であり、より実用的とするこ
とができる。FIGS. 4(a) and (b3 are other embodiments of the present invention,
The difference from FIG. 1 is that a plate 6 is provided above the differential microphone unit 4, and the distance d is increased. In other words, since the I/d is kept as low as possible to about 1 or less, the proximity effect is large and the sensitivity can be further increased, and the sensitivity change and frequency characteristic change due to distance can be reduced, making it more practical. It can be done.
又、マイクロホンユニット４と音孔２ａとの距離が実質
的に長くできるので静電気等の影響を受けにくいという
利点もある。Furthermore, since the distance between the microphone unit 4 and the sound hole 2a can be substantially increased, there is an advantage that it is less susceptible to the effects of static electricity and the like.
第６図は第４図の実施例のマイクロホンをハンドセット
に構成した場合の送話部２０部分拡大図である。７はウ
ィンドスクリーンであり、なくても、接話効果は得られ
るがポツプノイズ等の影響を防止するためのものである
。FIG. 6 is a partially enlarged view of the transmitting unit 20 when the microphone of the embodiment shown in FIG. 4 is configured into a handset. Reference numeral 7 designates a windscreen, which is used to prevent the effects of pop noise, etc., although the close-talk effect can be obtained even without it.
第６図は第１図と第４図の実施例において、距離１を変
化した場合の感度変化例を示す図であり。FIG. 6 is a diagram showing an example of sensitivity change when the distance 1 is changed in the embodiments of FIGS. 1 and 4.
第４図の実施例の方が距離１の影響が小さいことがわか
る。又、感度も数ｄＢ上昇できることを確認している。It can be seen that the influence of distance 1 is smaller in the embodiment shown in FIG. It has also been confirmed that the sensitivity can be increased by several dB.
第７図は第３の実施例であり、第１図、第４図の実施例
とは違い、マイクロホンユニット４を垂直の軸方向とし
た例である。この場合も同様な効果が得られることを確
認している。FIG. 7 shows a third embodiment, which differs from the embodiments shown in FIGS. 1 and 4 in that the microphone unit 4 is oriented vertically. It has been confirmed that similar effects can be obtained in this case as well.
第８図は第６図と同構造においてマイクロホンユニット
４に単一指向性を用いた場合の周波数特性例であり、接
話型の場合より１周囲原音をひろいやすいが距離１によ
る音質変化、感度変化が少ないので、目的によってはよ
り実用的と言える。Figure 8 shows an example of frequency characteristics when the microphone unit 4 is unidirectional with the same structure as Figure 6. Although it is easier to obtain the original sound of one surrounding area than in the case of a close-talk type, the sound quality changes depending on the distance 1, and the sensitivity Since there are fewer changes, it can be said to be more practical depending on the purpose.
本実施例では電話機用等のハツトセットを例にとり説明
したが、他のマイクロホン、例えばハンドマイクロホン
等についても同様の効果が得られる。Although this embodiment has been described using a hat set for a telephone as an example, similar effects can be obtained with other microphones, such as a hand microphone.
第９図は本発明のマイクロホンユニットをハンドセント
以外に取り付けた場合の例である。（、）はハンドマイ
クロホン、（ｂ）は電話本体にハンドフリー用マイクロ
ホンとして取り付けた場合である。FIG. 9 shows an example in which the microphone unit of the present invention is attached to a device other than a hand socket. (,) is a hand microphone, and (b) is a case where it is attached to a telephone body as a hands-free microphone.
又、差動型マイクロホンユニットとしては各種方式が考
えられるが、小型で構成しやすいエレクトレット・コン
デンサ・マイクロホン等が最適である。Various types of differential microphone units are possible, but electret condenser microphones and the like are most suitable because they are small and easy to configure.
発明の効果
本発明は上記実施例から明らかな様に、差動型マイクロ
ホンユニットを凹状ホルダー内に構成し。Effects of the Invention As is clear from the above embodiments, the present invention comprises a differential microphone unit in a concave holder.
前部音孔、背部音孔を同一面となる如く音導を前記ホル
ダーの上面側に構成しているので、従来の様な特殊デザ
インは必要なく、一般的無指向性マイクロホンと同様な
デザインが可能であり、デザイン上の制約を大きく排除
することができると共に１周囲騒音の除去もしくはハウ
リングマージンの改善に大きな効果を有する。更に音孔
部が一面となっているので、手等で塞いだ時の遮音も可
能であるという効果を有する。Since the sound guide is configured on the top side of the holder so that the front sound hole and the back sound hole are on the same surface, there is no need for a special design like in the past, and the design is similar to that of a general omnidirectional microphone. It is possible to eliminate design constraints to a large extent, and has a great effect in eliminating ambient noise or improving howling margin. Furthermore, since the sound hole portion is on one side, it has the effect of being able to block the sound when it is covered with a hand or the like.
第１図（ａ）は本発明の一実施例を示すマイクロホンユ
ニットの上面図、第１図（ｂ）は同断面図、第２図は第
１図のマイクロホンユニットをハンドセクトに取り付け
た部分拡大断面図、！３図は本実施例における接話型マ
イクロホンユニットを用いた場合の周波数特性図、第４
図（ａ）は本発明の他の実施例を示す上面図、第４図（
ｂ）は同断面図、第６図は同図におけるマイクロホンを
ハンドセントに取り付けた断面図、第６図は第１図、第
４図の実施例における距離１と感度変化を示す比較図、
第７図（ａ）は本発明の第３の実施例を示す上面図、第
７図（ｂ）は同断面図、第８図は第６図と同構造におい
てマイクロホンユニットを単一指向性とした場合の周波
数特性図、第９図（ａ）、 （ｂ）は本発明の応用実施
例を示す外観斜視図、第１０図（ａ）は従来の電話機用
ハンドセットの構成例を示す外観斜視図、第１０図（ｂ
）は送話側の部分拡大断面図である。
４゛゛マイクロホンユニツト、５・・・ホルダー。
代理人の氏名 弁理士 中 尾 敏 男 はか１名第１
図
？
第３図
砧
、 ３
に
ＭＳ交歓（Ｈｔ）
第 ４ 図
、ｆ４
第 ６ 図 第 ７ Ａｓ
Ｓ）FIG. 1(a) is a top view of a microphone unit showing an embodiment of the present invention, FIG. 1(b) is a sectional view of the same, and FIG. 2 is an enlarged partial view of the microphone unit of FIG. 1 attached to a handset. Cross section! Figure 3 is a frequency characteristic diagram when using the close-talk type microphone unit in this example.
Figure (a) is a top view showing another embodiment of the present invention, and Figure 4 (
b) is a sectional view of the same, FIG. 6 is a sectional view of the microphone attached to the hand center, and FIG. 6 is a comparison diagram showing distance 1 and sensitivity change in the embodiments of FIGS. 1 and 4.
FIG. 7(a) is a top view showing the third embodiment of the present invention, FIG. 7(b) is a sectional view of the same, and FIG. 8 is a unidirectional microphone unit with the same structure as FIG. 6. 9(a) and 9(b) are external perspective views showing an applied example of the present invention, and FIG. 10(a) is an external perspective view showing an example of the configuration of a conventional telephone handset. , Figure 10 (b
) is a partially enlarged sectional view of the transmitter side. 4. Microphone unit, 5. Holder. Name of agent: Patent attorney Toshio Nakao (1st person)
figure? Figure 3 Kinuta, 3 and MS exchange (Ht) Figure 4, f4 Figure 6 Figure 7 As
S)
Claims (2)
、前記マイクロホンの前部及び背部への音導を前記ホル
ダーの上面の同一開孔面となる如く構成したことを特徴
とするマイクロホンユニット。(1) A microphone unit characterized in that a differential microphone is housed in a concave holder, and sound is guided to the front and back of the microphone by the same opening surface on the top surface of the holder.
構成したことを特徴とする特許請求の範囲第１項記載の
マイクロホンユニット。(2) The microphone unit according to claim 1, wherein the microphone unit is configured in a device such as a handset and a hand microphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62066378A JPH0744750B2 (en) | 1987-03-20 | 1987-03-20 | Microphone unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62066378A JPH0744750B2 (en) | 1987-03-20 | 1987-03-20 | Microphone unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63232798A true JPS63232798A (en) | 1988-09-28 |
| JPH0744750B2 JPH0744750B2 (en) | 1995-05-15 |
Family
ID=13314105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62066378A Expired - Lifetime JPH0744750B2 (en) | 1987-03-20 | 1987-03-20 | Microphone unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0744750B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03252246A (en) * | 1990-02-28 | 1991-11-11 | Kokusai Electric Co Ltd | Handset |
| JPH04217199A (en) * | 1990-02-28 | 1992-08-07 | American Teleph & Telegr Co <Att> | Directional microphone assembly |
| JPH07202997A (en) * | 1993-12-28 | 1995-08-04 | Nec Corp | Structure for transmission part of electronic instrument |
| JP2009050031A (en) * | 2008-12-01 | 2009-03-05 | Funai Electric Advanced Applied Technology Research Institute Inc | Microphone unit, close-talking voice input device, and information processing system |
| WO2009119852A1 (en) * | 2008-03-27 | 2009-10-01 | 株式会社船井電機新応用技術研究所 | Microphone unit, voice input device of close-talking type, information processing system, and method for manufacturing microphone unit |
| JP2009290342A (en) * | 2008-05-27 | 2009-12-10 | Funai Electric Advanced Applied Technology Research Institute Inc | Voice input device and voice conference system |
| JP2011507386A (en) * | 2007-12-21 | 2011-03-03 | タンドベルク・テレコム・エイ・エス | Microphone device |
| US8180082B2 (en) | 2007-04-04 | 2012-05-15 | Funai Electric Advanced Applied Technology Research Institute Inc. | Microphone unit, close-talking voice input device, information processing system, and method of manufacturing microphone unit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013175776A1 (en) * | 2012-05-22 | 2013-11-28 | 京セラ株式会社 | Electronic device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS424814Y1 (en) * | 1965-10-27 | 1967-03-14 | ||
| JPS5910864U (en) * | 1982-07-09 | 1984-01-23 | 北林 誠一 | aerosol injection container |
-
1987
- 1987-03-20 JP JP62066378A patent/JPH0744750B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS424814Y1 (en) * | 1965-10-27 | 1967-03-14 | ||
| JPS5910864U (en) * | 1982-07-09 | 1984-01-23 | 北林 誠一 | aerosol injection container |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03252246A (en) * | 1990-02-28 | 1991-11-11 | Kokusai Electric Co Ltd | Handset |
| JPH04217199A (en) * | 1990-02-28 | 1992-08-07 | American Teleph & Telegr Co <Att> | Directional microphone assembly |
| JPH07202997A (en) * | 1993-12-28 | 1995-08-04 | Nec Corp | Structure for transmission part of electronic instrument |
| JP2626534B2 (en) * | 1993-12-28 | 1997-07-02 | 日本電気株式会社 | Transmission structure of electronic equipment |
| US8180082B2 (en) | 2007-04-04 | 2012-05-15 | Funai Electric Advanced Applied Technology Research Institute Inc. | Microphone unit, close-talking voice input device, information processing system, and method of manufacturing microphone unit |
| JP2011507386A (en) * | 2007-12-21 | 2011-03-03 | タンドベルク・テレコム・エイ・エス | Microphone device |
| US8170256B2 (en) | 2007-12-21 | 2012-05-01 | Cisco Technology, Inc. | Microphone assembly for minimizing acoustic feedback from a loudspeaker |
| WO2009119852A1 (en) * | 2008-03-27 | 2009-10-01 | 株式会社船井電機新応用技術研究所 | Microphone unit, voice input device of close-talking type, information processing system, and method for manufacturing microphone unit |
| JP2009239631A (en) * | 2008-03-27 | 2009-10-15 | Funai Electric Advanced Applied Technology Research Institute Inc | Microphone unit, close-talking voice input device, information processing system, and manufacturing method for microphone unit |
| US8605930B2 (en) | 2008-03-27 | 2013-12-10 | Funai Electric Co., Ltd. | Microphone unit, close-talking type speech input device, information processing system, and method for manufacturing microphone unit |
| JP2009290342A (en) * | 2008-05-27 | 2009-12-10 | Funai Electric Advanced Applied Technology Research Institute Inc | Voice input device and voice conference system |
| JP2009050031A (en) * | 2008-12-01 | 2009-03-05 | Funai Electric Advanced Applied Technology Research Institute Inc | Microphone unit, close-talking voice input device, and information processing system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0744750B2 (en) | 1995-05-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |