JPS6439196A - Stereoscopic zoom microphone - Google Patents

Stereoscopic zoom microphone

Info

Publication number
JPS6439196A
JPS6439196A JP19471587A JP19471587A JPS6439196A JP S6439196 A JPS6439196 A JP S6439196A JP 19471587 A JP19471587 A JP 19471587A JP 19471587 A JP19471587 A JP 19471587A JP S6439196 A JPS6439196 A JP S6439196A
Authority
JP
Japan
Prior art keywords
varactor
level
output
unit
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
JP19471587A
Other languages
Japanese (ja)
Inventor
Michio Matsumoto
Satoru Ibaraki
Katsunori Fujimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP19471587A priority Critical patent/JPS6439196A/en
Publication of JPS6439196A publication Critical patent/JPS6439196A/en
Pending legal-status Critical Current

Links

Landscapes

  • Stereophonic Arrangements (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To simplify a circuit without losing a function, to miniaturize the titled microphone and to decrease cost by providing two unidirectional microphone units, one bidirectional microphone unit, two level varactors and synthesizers, etc. CONSTITUTION:A first level varactor 5 is connected with a phase shifter 4 to be connected with a first unidirectional microphone unit 1. A second level varactor 6 is connected with a bidirectional microphone unit 3, interlocks the varactor 5 and an output level is varied relatively. A first synthesizer 7 adds the outputs of the varactors 5 and 6 to the output of a second single directivity micro unit 2, a second synthesizer 8 adds the output of the adder 5 to the output of the unit 2 and subtracts the output of the varactor 6. Thus, without losing the function, three synthesizers and one level varactor can be eliminated compared with a conventional constitution, the circuit can be simplified and the miniaturization and the reduction in cost can be attained.
JP19471587A 1987-08-04 1987-08-04 Stereoscopic zoom microphone Pending JPS6439196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19471587A JPS6439196A (en) 1987-08-04 1987-08-04 Stereoscopic zoom microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19471587A JPS6439196A (en) 1987-08-04 1987-08-04 Stereoscopic zoom microphone

Publications (1)

Publication Number Publication Date
JPS6439196A true JPS6439196A (en) 1989-02-09

Family

ID=16329042

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19471587A Pending JPS6439196A (en) 1987-08-04 1987-08-04 Stereoscopic zoom microphone

Country Status (1)

Country Link
JP (1) JPS6439196A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0344995U (en) * 1989-09-06 1991-04-25

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0344995U (en) * 1989-09-06 1991-04-25

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