JPH0458699A - Microphone unit - Google Patents
Microphone unitInfo
- Publication number
- JPH0458699A JPH0458699A JP2170626A JP17062690A JPH0458699A JP H0458699 A JPH0458699 A JP H0458699A JP 2170626 A JP2170626 A JP 2170626A JP 17062690 A JP17062690 A JP 17062690A JP H0458699 A JPH0458699 A JP H0458699A
- Authority
- JP
- Japan
- Prior art keywords
- microphone unit
- microphone
- omnidirectional
- camera body
- signal
- 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
- 230000002457 bidirectional effect Effects 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 230000035945 sensitivity Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2410/00—Microphones
- H04R2410/01—Noise reduction using microphones having different directional characteristics
Landscapes
- Circuit For Audible Band Transducer (AREA)
- Stereophonic Arrangements (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はマイクロホンユニットの近傍の雑音及び振動、
風雑音を低減するマイクロホン装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to noise and vibration in the vicinity of a microphone unit.
The present invention relates to a microphone device that reduces wind noise.
従来の技術
近年、ビデオ一体型カメラは音声と映像を簡単に収録す
ることができる機器として、更にその普及率が伸びてき
ている。それに伴いビデオ一体型カメラも機能が拡充さ
れ、小型軽量化が図られてきた。2. Description of the Related Art In recent years, integrated video cameras have become increasingly popular as devices that can easily record audio and video. Along with this, the functions of integrated video cameras have been expanded, and efforts have been made to make them smaller and lighter.
以下、従来のビデオ一体型カメラの代表的な例について
図面を参照しながら説明する。Hereinafter, typical examples of conventional video integrated cameras will be described with reference to the drawings.
第５図は従来のビデオ一体型カメラの外観を示す図であ
る。マイクロホン部１は本体の発する雑音及び振動の影
響を避けるために、ゴムなどの防振材料を介してユニッ
トを固定し本体２より離れた位置に設置されている。更
に風雑音を低減するため風防を設けている。FIG. 5 is a diagram showing the appearance of a conventional video integrated camera. In order to avoid the effects of noise and vibration generated by the main body, the microphone unit 1 is fixed to the unit via a vibration-proofing material such as rubber, and is installed at a position apart from the main body 2. Furthermore, a windshield is installed to reduce wind noise.
発明が解決しようとする課題
しかしながら、ビデオ一体型カメラを更に小型化する場
合、上述のようなビデオ一体型カメラの構成では実用的
にもデザイン的にも問題がある。Problems to be Solved by the Invention However, when the video integrated camera is further miniaturized, the above-described configuration of the video integrated camera has problems both in terms of practicality and design.
これに対し、第６図に示すようにビデオ一体型カメラ本
体３にマイクロホン部４を埋め込む構成をとる場合には
、マイクロホン部４は本体の発する振動及び雑音の影響
を直接受ける結果となる。従って、収音時のＳＮ比が低
下してしまい、収音品質が著しく劣化するという問題点
を生じる。このＳＮ比の低下という問題への有力な対応
策として超指向性を用いる方法、信号処理技術を用いて
雑音を除去する方法が考えられるがスペースの制約やコ
ストという点からは困難である。On the other hand, when the microphone section 4 is embedded in the video integrated camera body 3 as shown in FIG. 6, the microphone section 4 is directly affected by vibrations and noise generated by the camera body. Therefore, a problem arises in that the SN ratio during sound collection is reduced, and the sound collection quality is significantly degraded. Possible countermeasures to the problem of a reduction in the S/N ratio include a method using superdirectivity and a method using signal processing technology to remove noise, but these are difficult due to space constraints and cost.
以上の理由により、性能、デザイン、コストの面におい
て満足し得るマイクロホン装置はまだ開発されていない
のが実情である。For the above reasons, the reality is that a microphone device that is satisfactory in terms of performance, design, and cost has not yet been developed.
本発明は無指向性マイクロホンと単一指向性マイクロホ
ンを用いてマイクロホンユニットの近傍の雑音及び振動
、風雑音を低減し、ＳＮ比の良い収音ができるマイクロ
ホン装置を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a microphone device that uses an omnidirectional microphone and a unidirectional microphone to reduce noise, vibration, and wind noise in the vicinity of a microphone unit, and can collect sound with a good signal-to-noise ratio.
課題を解決するための手段
上記目的を達成するため本発明のマイクロホンｉｔは、
無指向性マイクロホンユニットと双指向性マイクロホン
ユニットを、主軸をビデオ一体型カメラ本体に向けて、
両マイクロホンユニットを平行または両ユニットの主軸
が一直線上に並ぶように配置し、双指向性マイクロホン
ユニットの出力信号をイコライザを通した後に、両ユニ
ットが同極性のときは減算、互いに異極性のときは加算
した構成とする。但し、マイクロホンユニットの極性は
ユニットの正面より正の音圧が加わったときに生じる出
力電圧の正負によって決定されるものである。Means for Solving the Problems In order to achieve the above object, the microphone IT of the present invention has the following features:
Place the omnidirectional microphone unit and the figure-directional microphone unit with their main axes facing the video camera body.
Arrange both microphone units in parallel or so that the main axes of both units are aligned in a straight line, and after passing the output signal of the bidirectional microphone unit through an equalizer, subtract when both units have the same polarity, or subtract when they have different polarities. is an added configuration. However, the polarity of the microphone unit is determined by the polarity of the output voltage generated when positive sound pressure is applied from the front of the unit.
また、無指向性マイクロホンユニットと双指向性マイク
ロホンユニットを、主軸をビデオ一体型カメラ本体に対
して逆に向けて、両マイクロホンユニットを平行または
両ユニットの主軸が一直線上に並ぶように配置し、双指
向性マイクロホンユニットの出力信号をイコライザを通
した後に、両ユニットが同極性のときは加算、互いに異
極性のときは減算した構成とする。In addition, the omnidirectional microphone unit and the figure-directional microphone unit are arranged with their main axes facing oppositely to the video integrated camera body, and both microphone units are arranged in parallel or so that the main axes of both units are aligned in a straight line. After the output signals of the bidirectional microphone units are passed through an equalizer, they are added when both units have the same polarity, and are subtracted when they have different polarities.
また、無指向性マイクロホンユニットと双指向性マイク
ロホンユニットを、無指向性マイクロホンはその主軸を
ビデオ一体型カメラ本体に向け、双指向性マイクロホン
はその主軸をビデオ一体型カメラ本体に対して逆に向け
て、両マイクロホンユニットを平行または両ユニットの
主軸が一直線上に並ぶように配置し、双指向性マイクロ
ホンユニットの出力信号をイコライザを通した後に、両
ユニットが同極性のときは加算、互いに異極性のときは
減算した構成とする。In addition, the omnidirectional microphone unit and the figure-directional microphone unit are arranged such that the omnidirectional microphone has its main axis facing the camera body with integrated video, and the figure-directional microphone has its main axis facing the camera body with integrated video camera. Arrange both microphone units in parallel or so that the main axes of both units are aligned in a straight line, and after passing the output signal of the bidirectional microphone unit through an equalizer, it is added when both units have the same polarity, and when they are of different polarity. In this case, the configuration is subtracted.
また、無指向性マイクロホンユニットと双指向性マイク
ロホンユニットを、無指向性マイクロホンはその主軸を
ビデオ一体型カメラ本体に対して逆に向け、双指向性マ
イクロホンはその主軸をビデオ一体型カメラ本体に対し
て逆に向けて、両マイクロホンユニットを平行または両
ユニットの主軸が一直線上に並ぶように配置し、双指向
性マイクロホンユニットの出力信号をイコライザを通し
た後に、両ユニットが同極性のときは減算、互いに異極
性のときは加算した構成とする。In addition, the omnidirectional microphone unit and the figure-directional microphone unit are arranged such that the omnidirectional microphone has its main axis facing the opposite direction to the video-integrated camera body, and the figure-directional microphone has its main axis facing the video-integrated camera body. Place both microphone units in parallel or with the main axes of both units aligned in a straight line, and after passing the output signal of the bidirectional microphone unit through an equalizer, subtract if both units have the same polarity. , when the polarities are different from each other, the configuration is such that they are added.
また、上述の各構成で無指向性マイクロホンと双指向性
マイクロホンに振動が加わったとき、両ユニットが一体
振動するように固定した構成とする。Furthermore, in each of the above configurations, when vibration is applied to the omnidirectional microphone and the bidirectional microphone, the configuration is fixed so that both units vibrate together.
作用
本発明は、上記の構成によってマイクロホンユニットの
近傍の雑音及び振動、風雑音を低域することが可能とな
り、ＳＮ比の良い収音ができる。Function: With the above-described configuration, the present invention makes it possible to reduce noise, vibration, and wind noise in the vicinity of the microphone unit to a low frequency range, and to collect sound with a good signal-to-noise ratio.
本発明のマイクロホン装置は、無指向性マイクロホンと
双指向性マイクロホンのユニット各−個を一対として用
いるものである。点音源に近接してマイクロホンを使用
する場合、音波の波面は球面波となり、音源から遠く波
面が平面波となる場合に比して音圧傾度が大きくなるた
め、双指向性マイクロホンの０度及び１８０度方向の音
圧感度は低周波数域を中心に持ち上げられる。この近接
効果によって、感度が高（なった状態の双指向性マイク
ロホンの周波数特性を、イコライザを用いて無指向性マ
イクロホンの周波数特性に一致させる。The microphone device of the present invention uses a pair of omnidirectional microphone and bidirectional microphone units. When a microphone is used close to a point sound source, the wavefront of the sound wave becomes a spherical wave, and the sound pressure gradient becomes larger than when the wavefront becomes a plane wave far from the sound source. The sound pressure sensitivity in the degree direction is increased mainly in the low frequency range. Due to this proximity effect, the frequency characteristics of a bidirectional microphone with high sensitivity are made to match the frequency characteristics of an omnidirectional microphone using an equalizer.
そして、２つのユニットの騒音源方向からの信号を相殺
するように、２つのユニットの出力信号を加算あるいは
減算することによって、遠い音源に対しては低域では無
指向性、高域では単一指向性に似た指向特性をもち、近
接した音源に対してはユニットの主軸方向の感度の低い
マイクロホン装置を実現することができる。Then, by adding or subtracting the output signals of the two units so as to cancel out the signals from the noise source direction of the two units, the system creates an omnidirectional signal in the low range and a single direction in the high range for distant sound sources. It is possible to realize a microphone device that has directional characteristics similar to directivity and has low sensitivity in the main axis direction of the unit to nearby sound sources.
また、上述のように本発明によるマイクロホン装置は低
域では無指向性の指向特性を持つので、風雑音の影響を
受は難いマイクロホン装置を実現することができる。Further, as described above, since the microphone device according to the present invention has omnidirectional directivity characteristics in the low frequency range, it is possible to realize a microphone device that is hardly affected by wind noise.
更に、無指向性マイクロホンユニットと双指向性マイク
ロホンユニットが、一体振動するように固定することに
よってマイクロホンユニットに加わる振動の影響も除去
することができる。Furthermore, by fixing the omnidirectional microphone unit and the bidirectional microphone unit so that they vibrate integrally, the influence of vibrations applied to the microphone unit can also be eliminated.
実施例
以下、本発明の一実施例におけるマイクロホン装置につ
いて図面を参照しながら説明する。Embodiment Hereinafter, a microphone device according to an embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例におけるマイクロホン装置の
構成を示したものであり、図中１１はビデオ一体型カメ
ラ本体、１２は無指向性マイクロホンユニット、１３は
双指向性マイクロホンユニット、１４はイコライザ、１
５は減算器を示し、無指向性マイクロホンユニット１２
と、双指向性マイクロホンユニット１３は同図に示すよ
うに、その主軸をビデオ一体型カメラ本体１１に向けて
平行に配置しており、これらは同極性のものを用いてい
る。FIG. 1 shows the configuration of a microphone device according to an embodiment of the present invention. In the figure, 11 is a video integrated camera body, 12 is an omnidirectional microphone unit, 13 is a bidirectional microphone unit, and 14 is a bidirectional microphone unit. Equalizer, 1
5 indicates a subtracter, and omnidirectional microphone unit 12
As shown in the figure, the bidirectional microphone unit 13 is arranged in parallel with its main axis facing the video integrated camera body 11, and those having the same polarity are used.
双指向性マイクロホンユニット１３の音源が近傍にある
場合の出力信号が無指向性ユニット１２の周波数特性に
一致するように、双指向性マイクロホンユニット１３の
出力をイコライザ１４に入力する。The output of the bidirectional microphone unit 13 is input to the equalizer 14 so that the output signal of the bidirectional microphone unit 13 when the sound source is nearby matches the frequency characteristics of the omnidirectional unit 12.
第２図は双指向性マイクロホンユニット１３より１ｍの
距離と２ＣＩの距離にそれぞれ音源があるときのイコラ
イザを通した後の双指向性マイクロホン装置ン）１３０
周波数特性を示す、第２図の図中で実線、破線は各々マ
イクロホンユニットの主軸に対して０度、１８０度方向
の感度を表す、無指向性ユニット１２の出力信号よりイ
コライザ１４の出力を減算して本実施例のマイクロホン
装置の出力を得る。Figure 2 shows the bidirectional microphone device (130) after passing through an equalizer when the sound source is at a distance of 1 m and 2 CI from the bidirectional microphone unit 13, respectively.
In the diagram of FIG. 2, which shows the frequency characteristics, the solid line and the broken line represent the sensitivity in the 0 degree and 180 degree directions with respect to the main axis of the microphone unit, respectively.The output of the equalizer 14 is subtracted from the output signal of the omnidirectional unit 12. to obtain the output of the microphone device of this embodiment.
第３図は本実施例のマイクロホン装置より１ｍの距離に
音源があるときの周波数特性、第４図は本実施例のマイ
クロホン装置の近傍に音源があるときの周波数特性を示
す、第３図、第４図の図中で実線、破線は各々ビデオ一
体型カメラ正面に対して０度、１８０度方向の感度を表
す、第４図に見られるように本実施例のマイクロホン装
置によれば、近接した音源に対しては単一指向性となる
。従って、ビデオ一体型カメラ本体の発する雑音の影響
を低減することができる。FIG. 3 shows the frequency characteristics when the sound source is 1 m away from the microphone device of this embodiment, and FIG. 4 shows the frequency characteristics when the sound source is near the microphone device of this embodiment. In the diagram of FIG. 4, the solid line and the broken line represent the sensitivity in the 0 degree and 180 degree directions, respectively, with respect to the front of the video integrated camera.As seen in FIG. It becomes unidirectional for the sound source. Therefore, the influence of noise generated by the video integrated camera body can be reduced.
以上のように、本実施例のマイクロホン装置によれば、
マイクロホンユニットの近傍の雑音及び風雑音を低減す
ることが可能となり、ＳＮ比の良い収音ができる。As described above, according to the microphone device of this embodiment,
It becomes possible to reduce noise and wind noise in the vicinity of the microphone unit, and it is possible to collect sound with a good signal-to-noise ratio.
なお、本実施例においては、無指向性マイクロホンユニ
ットと双指向性マイクロホンユニットを同極性のものを
用いているが、互いに異極性の無指向性マイクロホンユ
ニットと双指向性マイクロホンユニットとを、その主軸
をビデオ一体型カメラ本体に向けて平行に配置し、双指
向性マイクロホンユニットの出力信号をイコライザを通
した信号に無指向性マイクロホンユニットの出力信号を
加算する構成によっても、第１図に示した構成のマイク
ロホン装置と同様の特性を得ることができ、マイクロホ
ンユニットの近傍の雑音及び風雑音を低減することが可
能となり、ＳＮ比の良い収音が実現できる。In this example, the omnidirectional microphone unit and the figure-directional microphone unit are of the same polarity, but the omnidirectional microphone unit and the figure-directional microphone unit, which have different polarities, are connected to their main axes. The output signal shown in Fig. 1 can also be achieved by arranging the microphone unit parallel to the video integrated camera body and adding the output signal of the omnidirectional microphone unit to the signal passed through the equalizer. It is possible to obtain characteristics similar to those of the microphone device having the above configuration, and it is possible to reduce noise and wind noise in the vicinity of the microphone unit, and it is possible to realize sound collection with a good S/N ratio.
また、同極性の無指向性マイクロホンユニットと双指向
性マイクロホンユニットとを、その主軸をビデオ一体型
カメラ本体に対して逆に向けて平行に配置し、双指向性
マイクロホンユニットの出力信号をイコライザを通した
信号に無指向性マイクロホンユニットの出力信号を加算
する構成、もくしは互いに異極性の無指向性マイクロホ
ンユニットと双指向性マイクロホンユニットとを、その
主軸をビデオ一体型カメラ本体に対して逆に向けて平行
に配置し、双指向性マイクロホンユニットの出力信号を
イコライザを通した信号を無指向性マイクロホンユニッ
トの出力信号から減算する構成のマイクロホン装置によ
っても、第１図に示した構成のマイクロホン装置と同様
の特性を得ることができ、マイクロホンユニットの近傍
の雑音及び風雑音を低減することが可能となり、ＳＮ比
の良い収音ができる。In addition, an omnidirectional microphone unit and a figure-directional microphone unit of the same polarity are arranged in parallel with their main axes facing oppositely to the video integrated camera body, and the output signal of the figure-directional microphone unit is applied to an equalizer. A configuration in which the output signal of an omnidirectional microphone unit is added to the passed signal, or an omnidirectional microphone unit and a bidirectional microphone unit with different polarities are connected with their main axes opposite to the video integrated camera body. The microphone with the configuration shown in Figure 1 can also be used with a microphone device configured to parallel the output signal of the omnidirectional microphone unit and subtract the output signal of the bidirectional microphone unit through an equalizer from the output signal of the omnidirectional microphone unit. It is possible to obtain characteristics similar to those of the device, it is possible to reduce noise and wind noise in the vicinity of the microphone unit, and it is possible to collect sound with a good S/N ratio.
また、同極性の無指向性マイクロホンユニットと双指向
性マイクロホンユニットとを、無指向性マイクロホンユ
ニットはその主軸をビデオ一体型カメラ本体に向け、双
指向性マイクロホンはその主軸をビデオ一体型カメラ本
体に対して逆に向けて平行に配置し、双指向性マイクロ
ホンユニットの出力信号をイコライザを通した信号に無
指向性マイクロホンユニットの出力信号を加算する構成
、もくしは互いに異極性の無指向性マイクロホンユニッ
トと双指向性マイクロホンユニットとを、無指向性マイ
クロホンユニットはその主軸をビデオ一体型カメラ本体
に向け、双指向性マイクロホンユニットはその主軸をビ
デオ一体型カメラ本体に対して逆に向けて平行に配置し
、双指向性マイクロホンユニットの出力信号をイコライ
ザを通した信号から無指向性マイクロホンユニットの出
力信号を減算する構成によっても、第１図に示した構成
のマイクロホン装置と同様の特性を得ることができ、マ
イクロホンユニットの近傍の雑音及び風雑音を低減する
ことが可能となり、ＳＮ比の良い収音ができる。In addition, an omnidirectional microphone unit and a figure-directional microphone unit of the same polarity are connected, with the omnidirectional microphone unit having its main axis directed toward the video-integrated camera body, and the figure-directional microphone having its main axis directed toward the video-integrated camera body. A configuration in which the output signal of the bidirectional microphone unit is added to the signal passed through the equalizer and the output signal of the omnidirectional microphone unit is placed in parallel with the opposite polarity. unit and the bidirectional microphone unit, the omnidirectional microphone unit has its main axis facing the video integrated camera body, and the bidirectional microphone unit has its main axis facing the opposite direction to the video integrated camera body and is parallel to the camera body. The same characteristics as the microphone device having the configuration shown in Fig. 1 can be obtained by subtracting the output signal of the omnidirectional microphone unit from the signal passed through the equalizer and the output signal of the bidirectional microphone unit. This makes it possible to reduce noise and wind noise in the vicinity of the microphone unit, making it possible to collect sound with a good signal-to-noise ratio.
さらに、同極性の無指向性マイクロホンユニットと双指
向性マイクロホンユニットとを、無指向性マイクロホン
ユニットはその主軸をビデオ一体型カメラ本体に対して
逆に向け、双指向性マイクロホンユニットはその主軸を
ビデオ一体型カメラ本体に向けて平行に配置し、双指向
性マイクロホンユニットの出力信号をイコライザを通し
た信号から無指向性マイクロホンユニットの出力信号を
減算する構成、もくしは互いに異極性の無指向性マイク
ロホンユニットと双指向性マイクロホンユニットとを、
無指向性マイクロホンはその主軸をビデオ一体型カメラ
本体に対して逆に向け、双指向性マイクロホンはその主
軸をビデオ一体型カメラ本体に向けて平行に配置し、双
指向性マイクロホンユニットの出力信号をイコライザを
通した信号から無指向性マイクロホンユニットの出力信
号に加算する構成によっても、第１図に示した構成のマ
イクロホン装置と同様の特性を得ることができ、マイク
ロホンユニットの近傍の雑音及び風雑音を低減すること
が可能となり、ＳＮ比の良い収音ができる。Furthermore, an omnidirectional microphone unit and a figure-directional microphone unit of the same polarity are connected, with the omnidirectional microphone unit having its main axis facing oppositely to the video integrated camera body, and the figure-directional microphone unit having its main axis facing the video camera body. A configuration in which the output signal of the omnidirectional microphone unit is placed parallel to the integrated camera body and the output signal of the omnidirectional microphone unit is subtracted from the signal passed through the equalizer, or the omnidirectional microphone unit has different polarities. A microphone unit and a bidirectional microphone unit,
Omnidirectional microphones have their main axes facing away from the video camera body, and figure-directional microphones have their main axes facing the video camera body and are placed parallel to each other, so that the output signal of the figure-directional microphone unit is By adding the signal passed through the equalizer to the output signal of the omnidirectional microphone unit, the same characteristics as the microphone device with the configuration shown in Figure 1 can be obtained, and noise and wind noise in the vicinity of the microphone unit can be obtained. This makes it possible to reduce noise, allowing sound collection with a good signal-to-noise ratio.
また、無指向性マイクロホンと双指向性マイクロホンの
両ユニットの主軸が一直線上に並ぶように配置した上述
の何れかのマイクロホン装置によっても、第１図の構成
のマイクロホン装置と同様の特性を得ることができ、マ
イクロホンユニットの近傍の雑音及び風雑音を低減する
することが可能となり、ＳＮ比の良い収音ができる。Furthermore, the same characteristics as the microphone device having the configuration shown in Fig. 1 can be obtained by using any of the above-mentioned microphone devices in which the main axes of both the omnidirectional microphone and the figure-directional microphone are arranged in a straight line. This makes it possible to reduce noise and wind noise in the vicinity of the microphone unit, and to collect sound with a good signal-to-noise ratio.
さらに、両ユニットを一体振動するように固定して構成
することにより、無指向性マイクロホンと双指向性マイ
クロホンに振動が加わっても、第１図の構成のマイクロ
ホン装置と同様の特性を得ることができ、マイクロホン
ユニットの近傍の雑音及び風雑音を低減することと共に
、マイクロホン装置に加えられる振動による振動雑音も
低減することが可能となり、ＳＮ比の良い収音ができる
。Furthermore, by configuring both units to be fixed so that they vibrate together, even if vibration is applied to the omnidirectional microphone and the bidirectional microphone, it is possible to obtain the same characteristics as the microphone device with the configuration shown in Figure 1. This makes it possible to reduce noise and wind noise in the vicinity of the microphone unit, and also to reduce vibration noise caused by vibrations applied to the microphone device, making it possible to collect sound with a good signal-to-noise ratio.
発明の効果
以上のように本発明は無指向性マイクロホンユニットと
双指向性マイクロホンユニットを、主軸をビデオ一体型
カメラ本体に向けて、両マイクロホンユニットを平行ま
たは両ユニットの主軸が一直線上に並ぶように配置し、
双指向性マイクロホンユニットの出力信号をイコライザ
を通した後に、両ユニットが同極性のときは減算、互い
に異極性のときは加算して構成することにより、マイク
ロホンユニットの近傍の雑音及び風雑音を低減すること
が可能となり、ＳＮ比の良い収音を実現することができ
る。Effects of the Invention As described above, the present invention provides an omnidirectional microphone unit and a bidirectional microphone unit, with their main axes facing the video integrated camera body, so that both microphone units are parallel or the main axes of both units are aligned in a straight line. Place it in
After passing the output signal of the bidirectional microphone unit through an equalizer, it is subtracted when both units have the same polarity, and added when they have different polarities, reducing noise and wind noise near the microphone unit. This makes it possible to achieve sound collection with a good signal-to-noise ratio.
また、無指向性マイクロホンユニットと双指向性マイク
ロホンユニットを、主軸をビデオ一体型カメラ本体に対
して逆に向けて、両マイクロホンユニットを平行または
両ユニットの主軸が一直線上に並ぶように配置し、双指
向性マイクロホンユニットの出力信号をイコライザを通
した後に、両ユニットが同極性のときは加算、互いに異
極性のときは減算したマイクロホン装置により、マイク
ロホンユニットの近傍の雑音及び風雑音を低減すること
が可能となり、ＳＮ比の良い収音を実現することができ
る。In addition, the omnidirectional microphone unit and the figure-directional microphone unit are arranged with their main axes facing oppositely to the video integrated camera body, and both microphone units are arranged in parallel or so that the main axes of both units are aligned in a straight line. To reduce noise and wind noise in the vicinity of the microphone unit by using a microphone device that passes the output signal of the bidirectional microphone unit through an equalizer, adds the signal when both units have the same polarity, and subtracts the signal when the polarities are different from each other. This makes it possible to collect sound with a good signal-to-noise ratio.
また、無指向性マイクロホンユニットと双指向性マイク
ロホンユニットを、無指向性マイクロホンはその主軸を
ビデオ一体型カメラ本体に向け、双指向性マイクロホン
はその主軸をビデオ一体型カメラ本体に対して逆に向け
て、両マイクロホンユニットを平行または両ユニットの
主軸が一直線上に並ぶように配置し、双指向性マイクロ
ホンユニットの出力信号をイコライザを通した後に、両
ユニットが同極性のときは加算、互いに異極性のときは
減算して構成することにより、マイクロホンユニットの
近傍の雑音及び風雑音を低減することが可能となり、Ｓ
Ｎ比の良い収音を実現することができる。In addition, the omnidirectional microphone unit and the figure-directional microphone unit are arranged such that the omnidirectional microphone has its main axis facing the camera body with integrated video, and the figure-directional microphone has its main axis facing the camera body with integrated video camera. Arrange both microphone units in parallel or so that the main axes of both units are aligned in a straight line, and after passing the output signal of the bidirectional microphone unit through an equalizer, it is added when both units have the same polarity, and when they are of different polarity. By subtracting the configuration, it is possible to reduce noise and wind noise near the microphone unit, and S
Sound collection with a good N ratio can be achieved.
また、無指向性マイクロホンユニットと双指向性マイク
ロホンユニットを、無指向性マイクロホンはその主軸を
ビデオ一体型カメラ本体に対して逆に向け、双指向性マ
イクロホンはその主軸をビデオ一体型カメラ本体に対し
て逆に向けて、両マイクロホンユニットを平行または両
ユニットの主軸が一直線上に並ぶように配置し、双指向
性マイクロホンユニットの出力信号をイコライザを通し
た後に、両ユニットが同極性のときは減算、互いに異極
性のときは加算して構成することにより、マイクロホン
ユニットの近傍の雑音及び風雑音を低減することが可能
となり、ＳＮ比の良い収音を実現することができる。In addition, the omnidirectional microphone unit and the figure-directional microphone unit are arranged such that the omnidirectional microphone has its main axis facing the opposite direction to the video-integrated camera body, and the figure-directional microphone has its main axis facing the video-integrated camera body. Place both microphone units in parallel or with the main axes of both units aligned in a straight line, and after passing the output signal of the bidirectional microphone unit through an equalizer, subtract if both units have the same polarity. , when they have different polarities, it is possible to reduce noise and wind noise in the vicinity of the microphone unit, and it is possible to achieve sound collection with a good S/N ratio.
また、上述の各マイクロホン装置で無指向性マイクロホ
ンと双指向性マイクロホンに振動が加わったとき、両ユ
ニットが一体振動するように固定して構成することによ
り、マイクロホンユニット近傍の雑音、風雑音及び振動
を低減することが可能となり、ＳＮ比の良い収音を実現
することができる。In addition, when vibration is applied to the omnidirectional microphone and the bidirectional microphone in each of the above-mentioned microphone devices, by fixing and configuring both units so that they vibrate as one, noise, wind noise, and vibration near the microphone unit can be reduced. This makes it possible to reduce the noise and achieve sound collection with a good signal-to-noise ratio.
第１図は本発明の一実施例におけるマイクロホン装置の
構成図、第２図はイコライザを通した後の双指向性マイ
クロホンの周波数特性図、第３図は本発明の一実施例に
おけるマイクロホン装置より１ｍの距離に音源があると
きの周波数特性図、第４図は本発明の一実施例における
マイクロホン装置の近傍に音源があるときの周波数特性
図、第５図は従来のビデオ一体型カメラの外観図、第６
図はマイクロホンを本体部に内蔵したビデオ一体型カメ
ラの外観図である。
１１・・・・・・ビデオ一体型カメラ本体、１２・・・
・・・無指向性マイクロホンユニット、１３・・・・・
・双指向性マイクロホンユニット、１４・・・・・・イ
コライザ、１５・・・・・・減算器。
代理人の氏名 弁理士 粟野重孝 はか１名第
！
図
旋層が１ｍのとさのＭ液ｖＩ特性
第
図
ィコ）イず奄１し敦薯Ｉ・？１ｌｌｌｉｉｌ性マイクΩ
ホン句町浪数賞」怪
館 ４１１Ｆ
１ｈ３と５のｌｌＩ漬諌四」生Fig. 1 is a configuration diagram of a microphone device according to an embodiment of the present invention, Fig. 2 is a frequency characteristic diagram of a bidirectional microphone after passing through an equalizer, and Fig. 3 is a diagram of a microphone device according to an embodiment of the present invention. A frequency characteristic diagram when a sound source is located at a distance of 1 m. FIG. 4 is a frequency characteristic diagram when a sound source is located near a microphone device according to an embodiment of the present invention. FIG. 5 is an external view of a conventional video integrated camera. Figure, 6th
The figure is an external view of an integrated video camera with a built-in microphone in the main body. 11... Video integrated camera body, 12...
...Omnidirectional microphone unit, 13...
- Bidirectional microphone unit, 14... Equalizer, 15... Subtractor. Name of agent: Patent attorney Shigetaka Awano Haka 1st person! Characteristics of the M liquid VI of a 1m spiral layer. 1lliil microphone Ω
Honkucho Romazu Prize” Kaikan 411F 1h3 and 5 no llI Tsukeishi” Raw
Claims (10)
性マイクロホンユニットとをその主軸をビデオ一体型カ
メラ本体に向けて平行に配置し、前記双指向性マイクロ
ホンユニットの出力信号をイコライザを通過させ、この
信号を前記無指向性マイクロホンユニットの出力信号か
ら減算して出力するよう構成したことを特徴とするマイ
クロホン装置。(1) An omnidirectional microphone unit and a figure-directional microphone unit of the same polarity are arranged in parallel with their main axes facing the video integrated camera body, and the output signal of the figure-directional microphone unit is passed through an equalizer; A microphone device characterized in that the microphone device is configured to subtract this signal from the output signal of the omnidirectional microphone unit and output the result.
双指向性マイクロホンユニットとをその主軸をビデオ一
体型カメラ本体に向けて平行に配置し、前記双指向性マ
イクロホンユニットの出力信号をイコライザを通過させ
、この信号を前記無指向性マイクロホンユニットの出力
信号に加算して出力するよう構成したことを特徴とする
マイクロホン装置。(2) An omnidirectional microphone unit and a figure-directional microphone unit having opposite polarities are arranged in parallel with their main axes facing the video integrated camera body, and the output signal of the figure-directional microphone unit is passed through an equalizer. , a microphone device configured to add this signal to the output signal of the omnidirectional microphone unit and output the resultant signal.
性マイクロホンユニットとをその主軸をビデオ一体型カ
メラ本体に対して逆に向けて平行に配置し、前記双指向
性マイクロホンユニットの出力信号をイコライザを通過
させ、この信号を前記無指向性マイクロホンユニットの
出力信号に加算して出力するよう構成したことを特徴と
するマイクロホン装置。(3) An omnidirectional microphone unit and a figure-directional microphone unit of the same polarity are arranged in parallel with their main axes facing oppositely to the video integrated camera body, and the output signal of the figure-directional microphone unit is converted into an equalizer. What is claimed is: 1. A microphone device characterized in that the microphone device is configured to allow a signal to pass therethrough, add this signal to an output signal of the omnidirectional microphone unit, and output the signal.
双指向性マイクロホンユニットとをその主軸をビデオ一
体型カメラ本体に対して逆に向けて平行に配置し、前記
双指向性マイクロホンユニットの出力信号をイコライザ
を通過させ、この信号を前記無指向性マイクロホンユニ
ットの出力信号から減算して出力するよう構成したこと
を特徴とするマイクロホン装置。(4) An omnidirectional microphone unit and a bidirectional microphone unit, which have opposite polarities, are arranged in parallel with their main axes facing oppositely to the video integrated camera body, and the output signal of the bidirectional microphone unit is A microphone device characterized in that the microphone device is configured to pass through an equalizer, subtract this signal from the output signal of the omnidirectional microphone unit, and output the resultant signal.
性マイクロホンユニットとを、前記無指向性マイクロホ
ンユニットはその主軸をビデオ一体型カメラ本体に向け
、前記双指向性マイクロホンユニットはその主軸をビデ
オ一体型カメラ本体に対して逆に向けて平行に配置し、
前記双指向性マィクロホンユニットの出力信号をイコラ
イザを通過させ、この信号を前記無指向性マイクロホン
ユニットの出力信号に加算して出力するよう構成したこ
とを特徴とするマイクロホン装置。(5) An omnidirectional microphone unit and a figure-directional microphone unit having the same polarity, the omnidirectional microphone unit having its main axis facing the video integrated camera body, and the figure-directional microphone unit having its main axis facing the video integrated camera body. Place it parallel to the camera body,
A microphone device characterized in that the output signal of the bidirectional microphone unit is passed through an equalizer, this signal is added to the output signal of the omnidirectional microphone unit, and the resultant signal is output.
双指向性マイクロホンユニットとを、前記無指向性マイ
クロホンユニットはその主軸をビデオ一体型カメラ本体
に向け、前記双指向性マイクロホンユニットはその主軸
をビデオ一体型カメラ本体に対して逆に向けて平行に配
置し、前記双指向性マイクロホンユニットの出力信号を
イコライザを通過させ、この信号を前記無指向性マイク
ロホンユニットの出力信号から減算して出力するよう構
成したことを特徴とするマイクロホン装置。(6) An omnidirectional microphone unit and a bidirectional microphone unit having opposite polarities, the omnidirectional microphone unit having its main axis directed toward the video integrated camera body, and the bidirectional microphone unit having its main axis directed toward the video camera body. The integrated camera body is arranged parallel to the integrated camera body, and the output signal of the bidirectional microphone unit is passed through an equalizer, and this signal is subtracted from the output signal of the omnidirectional microphone unit and output. A microphone device characterized by comprising:
向性マイクロホンユニットとを、前記無指向性マイクロ
ホンユニットはその主軸をビデオ一体型カメラ本体に対
して逆に向け、かつ前記双指向性マイクロホンユニット
はその主軸をビデオ一体型カメラ本体に向けて平行に配
置し、前記双指向性マイクロホンユニットの出力信号を
イコライザを通過させ、この信号から前記無指向性マイ
クロホンユニットの出力信号を減算して出力するよう構
成したことを特徴とするマイクロホン装置。(7) An omnidirectional microphone unit and a bidirectional microphone unit having the same polarity, the omnidirectional microphone unit has its main axis facing oppositely to the video integrated camera body, and the bidirectional microphone unit has the same polarity. The main axis is arranged parallel to the video integrated camera body, the output signal of the bidirectional microphone unit is passed through an equalizer, the output signal of the omnidirectional microphone unit is subtracted from this signal, and the result is output. A microphone device characterized by comprising:
双指向性マイクロホンユニットとを、前記無指向性マイ
クロホンユニットはその主軸をビデオ一体型カメラ本体
に対して逆に向け、かつ前記双指向性マイクロホンユニ
ットはその主軸をビデオ一体型カメラ本体に向けて平行
に配置し、前記双指向性マイクロホンユニットの出力信
号をイコライザを通過させ、この信号を前記無指向性マ
イクロホンユニットの出力信号に加算して出力するよう
構成したことを特徴とするマイクロホン装置。(8) An omnidirectional microphone unit and a bidirectional microphone unit having opposite polarities, the omnidirectional microphone unit having its main axis facing oppositely to the video integrated camera body, and the bidirectional microphone unit is arranged in parallel with its main axis facing the video integrated camera body, passes the output signal of the bidirectional microphone unit through an equalizer, adds this signal to the output signal of the omnidirectional microphone unit, and outputs the resultant signal. A microphone device characterized in that it is configured as follows.
ロホンユニットの両ユニットの主軸が一直線上に並ぶよ
うに配置したことを特徴とする請求項（１）から請求項
（８）の何れかに記載のマイクロホン装置。(9) The method according to any one of claims (1) to (8), characterized in that the main axes of both the omnidirectional microphone unit and the bidirectional microphone unit are arranged in a straight line. Microphone device.
に振動が加わったとき、両ユニットが一体振動するよう
に固定したことを特徴とする請求項（１）から請求項（
９）の何れかに記載のマイクロホン装置。(10) Claims (1) through (10) characterized in that the omnidirectional microphone and the bidirectional microphone are fixed so that both units vibrate together when vibration is applied to the omnidirectional microphone and the bidirectional microphone.
9) The microphone device according to any one of 9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2170626A JP2523951B2 (en) | 1990-06-28 | 1990-06-28 | Microphone device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2170626A JP2523951B2 (en) | 1990-06-28 | 1990-06-28 | Microphone device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0458699A true JPH0458699A (en) | 1992-02-25 |
| JP2523951B2 JP2523951B2 (en) | 1996-08-14 |
Family
ID=15908363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2170626A Expired - Fee Related JP2523951B2 (en) | 1990-06-28 | 1990-06-28 | Microphone device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2523951B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007005849A (en) * | 2005-06-21 | 2007-01-11 | Sony Corp | Recording apparatus, recording method, reproducing apparatus, reproducing method, program for recording method, and recording medium for recording the program for the recording method |
| JP2007158516A (en) * | 2005-12-01 | 2007-06-21 | Matsushita Electric Ind Co Ltd | Microphone apparatus |
| JP2007180896A (en) * | 2005-12-28 | 2007-07-12 | Kenwood Corp | Voice signal processor and voice signal processing method |
| JP2008060902A (en) * | 2006-08-31 | 2008-03-13 | Nippon Hoso Kyokai <Nhk> | Unidirectional microphone |
| JP2014512758A (en) * | 2011-04-01 | 2014-05-22 | ボーズ・コーポレーション | Pair type microphone to remove noise |
| EP2925016A3 (en) * | 2014-03-28 | 2015-10-07 | Funai Electric Co., Ltd. | Microphone device and microphone unit |
| US9930447B1 (en) | 2016-11-09 | 2018-03-27 | Bose Corporation | Dual-use bilateral microphone array |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5962295A (en) * | 1982-09-30 | 1984-04-09 | Matsushita Electric Ind Co Ltd | Microphone |
| JPS61196698A (en) * | 1985-02-26 | 1986-08-30 | Toshiba Corp | Microphone device |
-
1990
- 1990-06-28 JP JP2170626A patent/JP2523951B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5962295A (en) * | 1982-09-30 | 1984-04-09 | Matsushita Electric Ind Co Ltd | Microphone |
| JPS61196698A (en) * | 1985-02-26 | 1986-08-30 | Toshiba Corp | Microphone device |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007005849A (en) * | 2005-06-21 | 2007-01-11 | Sony Corp | Recording apparatus, recording method, reproducing apparatus, reproducing method, program for recording method, and recording medium for recording the program for the recording method |
| JP4692095B2 (en) * | 2005-06-21 | 2011-06-01 | ソニー株式会社 | Recording apparatus, recording method, reproducing apparatus, reproducing method, recording method program, and recording medium recording the recording method program |
| JP2007158516A (en) * | 2005-12-01 | 2007-06-21 | Matsushita Electric Ind Co Ltd | Microphone apparatus |
| JP2007180896A (en) * | 2005-12-28 | 2007-07-12 | Kenwood Corp | Voice signal processor and voice signal processing method |
| JP2008060902A (en) * | 2006-08-31 | 2008-03-13 | Nippon Hoso Kyokai <Nhk> | Unidirectional microphone |
| JP4746498B2 (en) * | 2006-08-31 | 2011-08-10 | 日本放送協会 | Unidirectional microphone |
| JP2014512758A (en) * | 2011-04-01 | 2014-05-22 | ボーズ・コーポレーション | Pair type microphone to remove noise |
| EP2925016A3 (en) * | 2014-03-28 | 2015-10-07 | Funai Electric Co., Ltd. | Microphone device and microphone unit |
| US9930447B1 (en) | 2016-11-09 | 2018-03-27 | Bose Corporation | Dual-use bilateral microphone array |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2523951B2 (en) | 1996-08-14 |
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