FR2161734B1 - - Google Patents

Info

Publication number
FR2161734B1
FR2161734B1 FR7106302A FR7106302A FR2161734B1 FR 2161734 B1 FR2161734 B1 FR 2161734B1 FR 7106302 A FR7106302 A FR 7106302A FR 7106302 A FR7106302 A FR 7106302A FR 2161734 B1 FR2161734 B1 FR 2161734B1
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
FR7106302A
Other languages
French (fr)
Other versions
FR2161734A1 (enrdf_load_stackoverflow
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of FR2161734A1 publication Critical patent/FR2161734A1/fr
Application granted granted Critical
Publication of FR2161734B1 publication Critical patent/FR2161734B1/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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/10—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
    • 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
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
FR7106302A 1970-02-25 1971-02-24 Expired FR2161734B1 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1608270 1970-02-25

Publications (2)

Publication Number Publication Date
FR2161734A1 FR2161734A1 (enrdf_load_stackoverflow) 1973-07-13
FR2161734B1 true FR2161734B1 (enrdf_load_stackoverflow) 1976-07-09

Family

ID=11906614

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7106302A Expired FR2161734B1 (enrdf_load_stackoverflow) 1970-02-25 1971-02-24

Country Status (4)

Country Link
US (1) US3703652A (enrdf_load_stackoverflow)
DE (1) DE2109013C3 (enrdf_load_stackoverflow)
FR (1) FR2161734B1 (enrdf_load_stackoverflow)
GB (1) GB1331841A (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982142A (en) * 1973-11-05 1976-09-21 Sontrix, Inc. Piezoelectric transducer assembly and method for generating a cone shaped radiation pattern
US4142412A (en) * 1976-05-12 1979-03-06 Sutures Inc. Doppler flow meter and method
US4259870A (en) * 1979-02-26 1981-04-07 Howmedica Inc. Doppler method of measuring flow
US4439847A (en) * 1981-12-21 1984-03-27 The Stoneleigh Trust High efficiency broadband directional sonar transducer
US4582065A (en) * 1984-06-28 1986-04-15 Picker International, Inc. Ultrasonic step scanning utilizing unequally spaced curvilinear transducer array
US4630342A (en) * 1984-12-21 1986-12-23 Motorola, Inc. Method of mounting a piezoelectric helmholtz transducer on a printed circuit board
US5212671A (en) * 1989-06-22 1993-05-18 Terumo Kabushiki Kaisha Ultrasonic probe having backing material layer of uneven thickness
BR112015025420A8 (pt) * 2013-04-03 2018-04-24 The Administrators Of The Tulane Educational Fund expressão de inibidores do hiv por células-tronco mesenquimais
FR3007926B1 (fr) * 2013-06-27 2016-01-08 Areva Np Transducteur a ultrasons

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2005741A (en) * 1932-12-15 1935-06-25 Harvey C Hayes Magneto-strictive sound generator
US2855526A (en) * 1955-10-24 1958-10-07 Aeroprojects Inc Apparatus for generating ultrasonic energy of high intensity
US3271596A (en) * 1963-11-12 1966-09-06 Boeing Co Electromechanical transducers
US3302163A (en) * 1965-08-31 1967-01-31 Jr Daniel E Andrews Broad band acoustic transducer
US3325779A (en) * 1965-09-13 1967-06-13 Westinghouse Electric Corp Transducer

Also Published As

Publication number Publication date
DE2109013A1 (de) 1971-09-16
FR2161734A1 (enrdf_load_stackoverflow) 1973-07-13
GB1331841A (en) 1973-09-26
DE2109013B2 (de) 1975-01-09
DE2109013C3 (de) 1975-08-21
US3703652A (en) 1972-11-21

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Legal Events

Date Code Title Description
ST Notification of lapse