FR2282768A1 - Directional acoustic sensor with three input stages - two coupled directional acoustic paths are established with compensating circuitry - Google Patents

Directional acoustic sensor with three input stages - two coupled directional acoustic paths are established with compensating circuitry

Info

Publication number
FR2282768A1
FR2282768A1 FR7525837A FR7525837A FR2282768A1 FR 2282768 A1 FR2282768 A1 FR 2282768A1 FR 7525837 A FR7525837 A FR 7525837A FR 7525837 A FR7525837 A FR 7525837A FR 2282768 A1 FR2282768 A1 FR 2282768A1
Authority
FR
France
Prior art keywords
directional acoustic
circuits
directional
established
input stages
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
FR7525837A
Other languages
French (fr)
Other versions
FR2282768B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of FR2282768A1 publication Critical patent/FR2282768A1/en
Application granted granted Critical
Publication of FR2282768B1 publication Critical patent/FR2282768B1/fr
Granted 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

A directional acoustic microphone system uses three receiver displaced relative to each other with phase circuits and compensating units. The three sensors are located coaxially at equal distances. An acoustic path is established from one sensor membrane through to the other pair. Amplifiers provide outputs for directional circuits linking the sensors. The phase circuits provide a directional characteristics based upon whether the natural phase shift is compensated or not. Compensating circuitry are linked with circuits coupling both directional circuits over a differential circuit to provide an output corresponding to a constant frequency characteristic.
FR7525837A 1974-08-19 1975-08-14 Directional acoustic sensor with three input stages - two coupled directional acoustic paths are established with compensating circuitry Granted FR2282768A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742439634 DE2439634B1 (en) 1974-08-19 1974-08-19 ARRANGEMENT FOR DIRECTED SOUND RECEPTION

Publications (2)

Publication Number Publication Date
FR2282768A1 true FR2282768A1 (en) 1976-03-19
FR2282768B1 FR2282768B1 (en) 1980-04-11

Family

ID=5923514

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7525837A Granted FR2282768A1 (en) 1974-08-19 1975-08-14 Directional acoustic sensor with three input stages - two coupled directional acoustic paths are established with compensating circuitry

Country Status (4)

Country Link
AT (1) AT348606B (en)
DE (1) DE2439634B1 (en)
FR (1) FR2282768A1 (en)
SE (1) SE398189B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2369766A1 (en) * 1976-11-01 1978-05-26 Polaroid Corp RECEPTION SYSTEM WITH A PRESELECTED DIRECTIONAL DISCHARGE CHARACTERISTIC
EP0229230A1 (en) * 1985-10-16 1987-07-22 Siemens Aktiengesellschaft Directional-microphone arrangement
FR2712132A1 (en) * 1993-11-01 1995-05-12 Motorola Inc Directional gradient microphone system and associated method.
WO2004016038A1 (en) * 2002-08-09 2004-02-19 Shure Incorporated Delay network microphones with harmonic nesting

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5939198A (en) * 1982-08-27 1984-03-03 Victor Co Of Japan Ltd Microphone device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2369766A1 (en) * 1976-11-01 1978-05-26 Polaroid Corp RECEPTION SYSTEM WITH A PRESELECTED DIRECTIONAL DISCHARGE CHARACTERISTIC
EP0229230A1 (en) * 1985-10-16 1987-07-22 Siemens Aktiengesellschaft Directional-microphone arrangement
FR2712132A1 (en) * 1993-11-01 1995-05-12 Motorola Inc Directional gradient microphone system and associated method.
WO2004016038A1 (en) * 2002-08-09 2004-02-19 Shure Incorporated Delay network microphones with harmonic nesting
US6788791B2 (en) 2002-08-09 2004-09-07 Shure Incorporated Delay network microphones with harmonic nesting

Also Published As

Publication number Publication date
SE7506924L (en) 1976-02-20
DE2439634B1 (en) 1976-03-18
AT348606B (en) 1979-02-26
ATA445675A (en) 1978-07-15
SE398189B (en) 1977-12-05
FR2282768B1 (en) 1980-04-11

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Legal Events

Date Code Title Description
ST Notification of lapse