JPH0344995U - - Google Patents
Info
- Publication number
- JPH0344995U JPH0344995U JP10526489U JP10526489U JPH0344995U JP H0344995 U JPH0344995 U JP H0344995U JP 10526489 U JP10526489 U JP 10526489U JP 10526489 U JP10526489 U JP 10526489U JP H0344995 U JPH0344995 U JP H0344995U
- Authority
- JP
- Japan
- Prior art keywords
- output
- microphone unit
- circuit
- phase
- unidirectional microphone
- 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
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000003786 synthesis reaction Methods 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 claims 3
- 230000002194 synthesizing effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Stereophonic Arrangements (AREA)
Description
第１図はこの考案の実施例を示すブロツク図、
第２図はその可変減衰器１８と可変合成回路１５
とを連動の可変抵抗器で構成する例を示す図、第
３図はこの考案における各種指向特性の例を示す
図である。
Figure 1 is a block diagram showing an embodiment of this invention.
FIG. 2 shows the variable attenuator 18 and variable synthesis circuit 15.
FIG. 3 is a diagram showing examples of various directional characteristics in this invention.
Claims (1)
定距離離れて同軸線上に配され、最大感度方向が
同一方向とされた第２単一指向性マイクロホンユ
ニツトと、 上記軸線上に配され、上記第１、第２単一指向
性マイクロホンユニツトの最大感度方向と９０°
異なる方向に最大感度方向が向けられた双指向性
マイクロホンユニツトと、 その双指向性マイクロホンユニツトの出力が供
給される可変減衰器と、 その可変減衰器の出力が供給され、その正相信
号と逆相信号とを出力する位相分割回路と、 上記第２単一指向性マイクロホンユニツトの出
力の位相を反転する位相反転回路と、 その位相反転回路の出力と上記第１単一指向性
マイクロホンユニツトの出力とを互いに減算する
減算回路と、 その減算回路の出力と上記第１単一指向性マイ
クロホンユニツトの出力とを合成し、かつその合
成比を変化させることができる可変合成回路と、 その可変合成回路の出力と上記位相分割回路の
正相信号出力とを加算する第１加算器と、 上記可変合成回路の出力と上記位相分割回路の
逆相信号出力とを加算する第２加算器と、 を具備するステレオズームマイクロホン。[Claims for Utility Model Registration] A first unidirectional microphone unit, a second unit disposed on a coaxial line at a predetermined distance from the first unidirectional microphone unit, and whose maximum sensitivity direction is in the same direction. a unidirectional microphone unit arranged on the axis and 90° with respect to the maximum sensitivity direction of the first and second unidirectional microphone units;
A figure-directional microphone unit whose maximum sensitivity direction is directed in different directions, a variable attenuator to which the output of the figure-directional microphone unit is supplied, and a variable attenuator to which the output of the variable attenuator is supplied and whose in-phase signal a phase dividing circuit that outputs a phase signal; a phase inversion circuit that inverts the phase of the output of the second unidirectional microphone unit; and an output of the phase inversion circuit and an output of the first unidirectional microphone unit. and a variable synthesis circuit capable of synthesizing the output of the subtraction circuit and the output of the first unidirectional microphone unit and changing the synthesis ratio, and the variable synthesis circuit. and a second adder that adds the output of the variable synthesis circuit and the negative phase signal output of the phase division circuit. Stereo zoom microphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10526489U JPH0344995U (en) | 1989-09-06 | 1989-09-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10526489U JPH0344995U (en) | 1989-09-06 | 1989-09-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0344995U true JPH0344995U (en) | 1991-04-25 |
Family
ID=31654030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10526489U Pending JPH0344995U (en) | 1989-09-06 | 1989-09-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0344995U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0674828U (en) * | 1993-03-24 | 1994-10-21 | 高茂産業株式会社 | Stoker furnace |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6439196A (en) * | 1987-08-04 | 1989-02-09 | Matsushita Electric Ind Co Ltd | Stereoscopic zoom microphone |
-
1989
- 1989-09-06 JP JP10526489U patent/JPH0344995U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6439196A (en) * | 1987-08-04 | 1989-02-09 | Matsushita Electric Ind Co Ltd | Stereoscopic zoom microphone |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0674828U (en) * | 1993-03-24 | 1994-10-21 | 高茂産業株式会社 | Stoker furnace |
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