CA1091588A - Systeme recepteur a caracteristique de rejection directionnelle preselectionnee - Google Patents

Systeme recepteur a caracteristique de rejection directionnelle preselectionnee

Info

Publication number
CA1091588A
CA1091588A CA282,195A CA282195A CA1091588A CA 1091588 A CA1091588 A CA 1091588A CA 282195 A CA282195 A CA 282195A CA 1091588 A CA1091588 A CA 1091588A
Authority
CA
Canada
Prior art keywords
receiving system
signal
sound
combining
array
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.)
Expired
Application number
CA282,195A
Other languages
English (en)
Inventor
William R. Wray
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
Application granted granted Critical
Publication of CA1091588A publication Critical patent/CA1091588A/fr
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
    • 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)
CA282,195A 1976-11-01 1977-07-06 Systeme recepteur a caracteristique de rejection directionnelle preselectionnee Expired CA1091588A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US73734776A 1976-11-01 1976-11-01
US737,347 1976-11-01

Publications (1)

Publication Number Publication Date
CA1091588A true CA1091588A (fr) 1980-12-16

Family

ID=24963548

Family Applications (1)

Application Number Title Priority Date Filing Date
CA282,195A Expired CA1091588A (fr) 1976-11-01 1977-07-06 Systeme recepteur a caracteristique de rejection directionnelle preselectionnee

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
EP4071072A4 (fr) * 2019-12-10 2023-02-15 TERUMO Kabushiki Kaisha 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
CH622395A5 (en) 1981-03-31
AT358927B (de) 1980-10-10
DE2748288A1 (de) 1978-05-03
FR2369766A1 (fr) 1978-05-26
JPS5357020A (en) 1978-05-24
FR2369766B1 (fr) 1984-03-23
GB1589691A (en) 1981-05-20
IT1088164B (it) 1985-06-10
JPS5623360B2 (fr) 1981-05-30
ATA763477A (de) 1980-02-15
DE2748288C2 (fr) 1989-11-02

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Legal Events

Date Code Title Description
MKEX Expiry