FR2369766B1 - - Google Patents

Info

Publication number
FR2369766B1
FR2369766B1 FR7730089A FR7730089A FR2369766B1 FR 2369766 B1 FR2369766 B1 FR 2369766B1 FR 7730089 A FR7730089 A FR 7730089A FR 7730089 A FR7730089 A FR 7730089A FR 2369766 B1 FR2369766 B1 FR 2369766B1
Authority
FR
France
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.)
Expired
Application number
FR7730089A
Other versions
FR2369766A1 (fr
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.)
Polaroid Corp
Original Assignee
Polaroid 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 Polaroid Corp filed Critical Polaroid Corp
Publication of FR2369766A1 publication Critical patent/FR2369766A1/fr
Application granted granted Critical
Publication of FR2369766B1 publication Critical patent/FR2369766B1/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • 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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
    • 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

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • General Health & Medical Sciences (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
FR7730089A 1976-11-01 1977-10-06 Systeme de reception possedant une caracteristique de rejet directionnel preselectionne Granted FR2369766A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73734776A 1976-11-01 1976-11-01

Publications (2)

Publication Number Publication Date
FR2369766A1 FR2369766A1 (fr) 1978-05-26
FR2369766B1 true FR2369766B1 (fr) 1984-03-23

Family

ID=24963548

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7730089A Granted FR2369766A1 (fr) 1976-11-01 1977-10-06 Systeme de reception possedant une caracteristique de rejet directionnel preselectionne

Country Status (8)

Country Link
JP (1) JPS5357020A (fr)
AT (1) AT358927B (fr)
CA (1) CA1091588A (fr)
CH (1) CH622395A5 (fr)
DE (1) DE2748288A1 (fr)
FR (1) FR2369766A1 (fr)
GB (1) GB1589691A (fr)
IT (1) IT1088164B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334740A (en) * 1978-09-12 1982-06-15 Polaroid Corporation Receiving system having pre-selected directional response
JPS5910119B2 (ja) * 1979-04-26 1984-03-07 日本ビクター株式会社 可変指向性マイクロホン
DE3020247C2 (de) * 1980-05-28 1982-09-02 Franz Vertriebsgesellschaft mbH, 7634 Kippenheim Verfahren und Anordnung zur Umwandlung von Schallwellen in digitale elektrische Signale mit Hilfe von elektroakustischen Wandlern
JPS5954039U (ja) * 1982-09-30 1984-04-09 株式会社ノーリツ 循環給湯風呂釜
FR2559325B1 (fr) * 1984-02-06 1986-08-22 Renault Appareillage permettant de capter et de transmettre au loin la parole d'une personne placee dans un milieu perturbe afin d'effectuer un traitement de cette parole
JPS63132241U (fr) * 1987-02-20 1988-08-30
US5463694A (en) * 1993-11-01 1995-10-31 Motorola Gradient directional microphone system and method therefor
US5515445A (en) * 1994-06-30 1996-05-07 At&T Corp. Long-time balancing of omni microphones
WO2021117715A1 (fr) * 2019-12-10 2021-06-17 テルモ株式会社 Boîte d'emballage et équipement médical emballé dans ladite boîte d'emballage

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502811A (en) * 1967-12-11 1970-03-24 Bell Telephone Labor Inc Directional microphone with frequency independent beamwidth
JPS5132445Y2 (fr) * 1971-04-09 1976-08-13
JPS4990103A (fr) * 1972-12-26 1974-08-28
GB1512514A (en) * 1974-07-12 1978-06-01 Nat Res Dev Microphone assemblies
DE2439634B1 (de) * 1974-08-19 1976-03-18 Schoeps, Karl, Dr.-Ing., 7500 Karlsruhe Anordnung zu gerichtetem schallempfang

Also Published As

Publication number Publication date
GB1589691A (en) 1981-05-20
DE2748288C2 (fr) 1989-11-02
ATA763477A (de) 1980-02-15
CH622395A5 (en) 1981-03-31
JPS5357020A (en) 1978-05-24
FR2369766A1 (fr) 1978-05-26
DE2748288A1 (de) 1978-05-03
AT358927B (de) 1980-10-10
IT1088164B (it) 1985-06-10
CA1091588A (fr) 1980-12-16
JPS5623360B2 (fr) 1981-05-30

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Legal Events

Date Code Title Description
ST Notification of lapse