JPS64895A - Directional microphone - Google Patents

Directional microphone

Info

Publication number
JPS64895A
JPS64895A JP15589687A JP15589687A JPS64895A JP S64895 A JPS64895 A JP S64895A JP 15589687 A JP15589687 A JP 15589687A JP 15589687 A JP15589687 A JP 15589687A JP S64895 A JPS64895 A JP S64895A
Authority
JP
Japan
Prior art keywords
microphone
directivity
output
phase
phase shifter
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
JP15589687A
Other languages
Japanese (ja)
Other versions
JPH01895A (en
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 JP62-155896A priority Critical patent/JPH01895A/en
Priority claimed from JP62-155896A external-priority patent/JPH01895A/en
Publication of JPS64895A publication Critical patent/JPS64895A/en
Publication of JPH01895A publication Critical patent/JPH01895A/en
Pending legal-status Critical Current

Links

Landscapes

  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To obtain a microphone which is miniaturized and has sharp in directivity and in addition, has a good directivity characteristic even at a high frequency by making a phase shifter into a multistage. CONSTITUTION:A sound wave coming from an angle theta against the main axis direction of the directivity of a microphone element, is made incident on the microphone elements 1a and 1b while keeping a prescribed phase difference. The output of the element 1b, after its phase is delayed by the set 2 of the multistaged phase shifter, is subtracted from the output of the element 1a by a synthesizer 3, and afterward, is outputted through an equalizer 4.
JP62-155896A 1987-06-23 directional microphone Pending JPH01895A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62-155896A JPH01895A (en) 1987-06-23 directional microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62-155896A JPH01895A (en) 1987-06-23 directional microphone

Publications (2)

Publication Number Publication Date
JPS64895A true JPS64895A (en) 1989-01-05
JPH01895A JPH01895A (en) 1989-01-05

Family

ID=

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0470200A (en) * 1990-07-10 1992-03-05 Hitachi Plant Eng & Constr Co Ltd Electronic silencing system
US5506908A (en) * 1994-06-30 1996-04-09 At&T Corp. Directional microphone system
JP2002253543A (en) * 2001-03-01 2002-09-10 Hitachi Medical Corp X-ray ct device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0470200A (en) * 1990-07-10 1992-03-05 Hitachi Plant Eng & Constr Co Ltd Electronic silencing system
US5506908A (en) * 1994-06-30 1996-04-09 At&T Corp. Directional microphone system
JP2002253543A (en) * 2001-03-01 2002-09-10 Hitachi Medical Corp X-ray ct device

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