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
Application number
JP10526489U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP10526489U priority Critical patent/JPH0344995U/ja
Publication of JPH0344995U publication Critical patent/JPH0344995U/ja
Pending legal-status Critical Current

Links

Description

【図面の簡単な説明】[Brief explanation of drawings]

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)

【実用新案登録請求の範囲】 第1単一指向性マイクロホンユニツトと、 その第1単一指向性マイクロホンユニツトと所
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.
JP10526489U 1989-09-06 1989-09-06 Pending JPH0344995U (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6439196A (en) * 1987-08-04 1989-02-09 Matsushita Electric Ind Co Ltd Stereoscopic zoom microphone

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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