JPS5689194A - Secondary acoustic pressure inclination unidirectional microphone system - Google Patents

Secondary acoustic pressure inclination unidirectional microphone system

Info

Publication number
JPS5689194A
JPS5689194A JP16615079A JP16615079A JPS5689194A JP S5689194 A JPS5689194 A JP S5689194A JP 16615079 A JP16615079 A JP 16615079A JP 16615079 A JP16615079 A JP 16615079A JP S5689194 A JPS5689194 A JP S5689194A
Authority
JP
Japan
Prior art keywords
output
mike
acoustic pressure
microphone system
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.)
Granted
Application number
JP16615079A
Other languages
Japanese (ja)
Other versions
JPS602837B2 (en
Inventor
Naotaka Miyaji
Makoto Yamamoto
Yukinobu Ishigaki
Kaoru Totsuka
Makoto Iwahara
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP16615079A priority Critical patent/JPS602837B2/en
Publication of JPS5689194A publication Critical patent/JPS5689194A/en
Publication of JPS602837B2 publication Critical patent/JPS602837B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To give extradirectivity and improve noise characteristic, by arranging two mikes in the sound source direction at a prescribed interval and by subjecting an output of one mike to pass through a high-pass filter, and the output of the other to the subtraction processing. CONSTITUTION:Unidirectional mikes 1 and 2 are arranged at a prescribed interval with their mike axes toward sound source S. The output which is obtained by causing the output of one mike 1 to pass through high-pass filter 5 and the output of the other mike 2 is subjected to the subtraction processing by subtracting circuit 3, and the result is applied to equalizer 4'.
JP16615079A 1979-12-20 1979-12-20 Secondary sound pressure gradient unidirectional microphone system Expired JPS602837B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16615079A JPS602837B2 (en) 1979-12-20 1979-12-20 Secondary sound pressure gradient unidirectional microphone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16615079A JPS602837B2 (en) 1979-12-20 1979-12-20 Secondary sound pressure gradient unidirectional microphone system

Publications (2)

Publication Number Publication Date
JPS5689194A true JPS5689194A (en) 1981-07-20
JPS602837B2 JPS602837B2 (en) 1985-01-24

Family

ID=15825979

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16615079A Expired JPS602837B2 (en) 1979-12-20 1979-12-20 Secondary sound pressure gradient unidirectional microphone system

Country Status (1)

Country Link
JP (1) JPS602837B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143782U (en) * 1981-03-04 1982-09-09
JPS5833396A (en) * 1981-08-20 1983-02-26 Matsushita Electric Ind Co Ltd Zoom microphone
US5226087A (en) * 1991-04-18 1993-07-06 Matsushita Electric Industrial Co., Ltd. Microphone apparatus
US5673325A (en) * 1992-10-29 1997-09-30 Andrea Electronics Corporation Noise cancellation apparatus
WO2001037519A2 (en) 1999-11-19 2001-05-25 Gentex Corporation Vehicle accessory microphone
US6882734B2 (en) 2001-02-14 2005-04-19 Gentex Corporation Vehicle accessory microphone
US7120261B1 (en) 1999-11-19 2006-10-10 Gentex Corporation Vehicle accessory microphone
US7447320B2 (en) 2001-02-14 2008-11-04 Gentex Corporation Vehicle accessory microphone

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5129024B2 (en) * 2008-05-27 2013-01-23 株式会社船井電機新応用技術研究所 Audio input device and audio conference system

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143782U (en) * 1981-03-04 1982-09-09
JPH0354475Y2 (en) * 1981-03-04 1991-12-02
JPS5833396A (en) * 1981-08-20 1983-02-26 Matsushita Electric Ind Co Ltd Zoom microphone
JPS6322720B2 (en) * 1981-08-20 1988-05-12 Matsushita Electric Ind Co Ltd
US5226087A (en) * 1991-04-18 1993-07-06 Matsushita Electric Industrial Co., Ltd. Microphone apparatus
US5673325A (en) * 1992-10-29 1997-09-30 Andrea Electronics Corporation Noise cancellation apparatus
US6614911B1 (en) 1999-11-19 2003-09-02 Gentex Corporation Microphone assembly having a windscreen of high acoustic resistivity and/or hydrophobic material
WO2001037519A3 (en) * 1999-11-19 2001-11-29 Gentex Corp Vehicle accessory microphone
WO2001037519A2 (en) 1999-11-19 2001-05-25 Gentex Corporation Vehicle accessory microphone
US7120261B1 (en) 1999-11-19 2006-10-10 Gentex Corporation Vehicle accessory microphone
US7130431B2 (en) 1999-11-19 2006-10-31 Gentex Corporation Vehicle accessory microphone
US7136494B2 (en) 1999-11-19 2006-11-14 Gentex Corporation Vehicle accessory microphone assembly having a windscreen with hydrophobic properties
EP1230739A4 (en) * 1999-11-19 2007-09-26 Gentex Corp Vehicle accessory microphone
US7443988B2 (en) 1999-11-19 2008-10-28 Gentex Corporation Vehicle accessory microphone
US8224012B2 (en) 1999-11-19 2012-07-17 Gentex Corporation Vehicle accessory microphone
US6882734B2 (en) 2001-02-14 2005-04-19 Gentex Corporation Vehicle accessory microphone
US7447320B2 (en) 2001-02-14 2008-11-04 Gentex Corporation Vehicle accessory microphone
US7616768B2 (en) 2001-02-14 2009-11-10 Gentex Corporation Vehicle accessory microphone having mechanism for reducing line-induced noise

Also Published As

Publication number Publication date
JPS602837B2 (en) 1985-01-24

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