JPS57168596A - Directional microphone - Google Patents

Directional microphone

Info

Publication number
JPS57168596A
JPS57168596A JP5268781A JP5268781A JPS57168596A JP S57168596 A JPS57168596 A JP S57168596A JP 5268781 A JP5268781 A JP 5268781A JP 5268781 A JP5268781 A JP 5268781A JP S57168596 A JPS57168596 A JP S57168596A
Authority
JP
Japan
Prior art keywords
pressure gradient
secondary pressure
units
outputs
output
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
JP5268781A
Other languages
Japanese (ja)
Inventor
Junta Inari
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP5268781A priority Critical patent/JPS57168596A/en
Publication of JPS57168596A publication Critical patent/JPS57168596A/en
Pending 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

Abstract

PURPOSE:To secure the slow directivity over an extremely wide band, by providing at least two secondary pressure gradient elements and synthesizing the outputs of these two gradient elements. CONSTITUTION:Three pressure gradient type microphone units M1-M3 having the same single directivity are distributed on a straight line and at different positions. These microphone units have the direction, and the 1st secondary pressure gradient element is formed with the units M1 and M3. And the 2nd secondary pressure gradient element is formed with the units M2 and M3. At the same time, the outputs A and C are supplied to an arithmetic circuit 5 along with the outputs B and C supplied to an arithmetic circuit 6 respectively among single directivities A-C delivered from the units M1-M3. As a result, the output D of the circuit 6 is defined as D=(C-B) to be turned into the secondary pressure gradient output at the treble band. While the output E of the circuit 5 shows E=(C-A) to be turned into the secondary pressure gradient output at the bass band. The outputs D and E are added 10 together through equalizing circuits 7 and 8.
JP5268781A 1981-04-08 1981-04-08 Directional microphone Pending JPS57168596A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5268781A JPS57168596A (en) 1981-04-08 1981-04-08 Directional microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5268781A JPS57168596A (en) 1981-04-08 1981-04-08 Directional microphone

Publications (1)

Publication Number Publication Date
JPS57168596A true JPS57168596A (en) 1982-10-16

Family

ID=12921793

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5268781A Pending JPS57168596A (en) 1981-04-08 1981-04-08 Directional microphone

Country Status (1)

Country Link
JP (1) JPS57168596A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57185294U (en) * 1981-05-18 1982-11-25
JPS5833396A (en) * 1981-08-20 1983-02-26 Matsushita Electric Ind Co Ltd Zoom microphone
JPS61196698A (en) * 1985-02-26 1986-08-30 Toshiba Corp Microphone device
JPS62281597A (en) * 1986-05-29 1987-12-07 Mitsubishi Motors Corp Microphone for automobile telephone
JPH0488190U (en) * 1990-12-13 1992-07-30

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57185294U (en) * 1981-05-18 1982-11-25
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
JPS61196698A (en) * 1985-02-26 1986-08-30 Toshiba Corp Microphone device
JPS62281597A (en) * 1986-05-29 1987-12-07 Mitsubishi Motors Corp Microphone for automobile telephone
JPH0488190U (en) * 1990-12-13 1992-07-30

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