FR2259508B1 - - Google Patents

Info

Publication number
FR2259508B1
FR2259508B1 FR7402534A FR7402534A FR2259508B1 FR 2259508 B1 FR2259508 B1 FR 2259508B1 FR 7402534 A FR7402534 A FR 7402534A FR 7402534 A FR7402534 A FR 7402534A FR 2259508 B1 FR2259508 B1 FR 2259508B1
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
FR7402534A
Other versions
FR2259508A1 (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.)
Bpifrance Financement SA
Original Assignee
Agence National de Valorisation de la Recherche ANVAR
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 Agence National de Valorisation de la Recherche ANVAR filed Critical Agence National de Valorisation de la Recherche ANVAR
Priority to FR7402534A priority Critical patent/FR2259508B1/fr
Priority to DE19752502009 priority patent/DE2502009A1/de
Priority to US05/543,453 priority patent/US3984704A/en
Publication of FR2259508A1 publication Critical patent/FR2259508A1/fr
Application granted granted Critical
Publication of FR2259508B1 publication Critical patent/FR2259508B1/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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
FR7402534A 1974-01-25 1974-01-25 Expired FR2259508B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7402534A FR2259508B1 (fr) 1974-01-25 1974-01-25
DE19752502009 DE2502009A1 (de) 1974-01-25 1975-01-20 Frequenzgang-entzerrer fuer elektromechanische wandler
US05/543,453 US3984704A (en) 1974-01-25 1975-01-23 Device for correcting the frequency response of an electromechanical transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7402534A FR2259508B1 (fr) 1974-01-25 1974-01-25

Publications (2)

Publication Number Publication Date
FR2259508A1 FR2259508A1 (fr) 1975-08-22
FR2259508B1 true FR2259508B1 (fr) 1978-03-31

Family

ID=9133997

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7402534A Expired FR2259508B1 (fr) 1974-01-25 1974-01-25

Country Status (3)

Country Link
US (1) US3984704A (fr)
DE (1) DE2502009A1 (fr)
FR (1) FR2259508B1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2339218A1 (fr) * 1976-01-20 1977-08-19 Charbonnages Ste Chimique Installation de surveillance a distance de personnes
US4130727A (en) * 1977-06-29 1978-12-19 Teledyne, Inc. Loudspeaker equalization
US4130726A (en) * 1977-06-29 1978-12-19 Teledyne, Inc. Loudspeaker system equalization
JPS61144565A (ja) * 1984-12-18 1986-07-02 Toshiba Corp 高分子圧電型超音波探触子
JPS61181959A (ja) * 1985-02-08 1986-08-14 Hitachi Ltd 超音波装置における信号検出装置
US8476948B2 (en) * 2009-08-21 2013-07-02 Stmicroelectronics International N.V. Reduced area schmitt trigger circuit

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365590A (en) * 1968-01-23 Hewlett Packard Co Piezoelectric transducer
US2562450A (en) * 1947-07-05 1951-07-31 Sperry Prod Inc Pulse cutoff device
FR1135055A (fr) * 1955-10-31 1957-04-24 Realisations Ultrasoniques Sa Dispositif électrique d'amortissement d'un traducteur électro-mécanique
US2921134A (en) * 1957-11-21 1960-01-12 Greenspan Martin Electrical-sonic transducers
FR1380730A (fr) * 1963-10-24 1964-12-04 Perfectionnements apportés aux dispositifs pour exciter électriquement des éléments piézoélectriques
US3569747A (en) * 1965-07-14 1971-03-09 Kistler Instr Corp Piezoelectric transducer
US3399314A (en) * 1965-11-12 1968-08-27 Hewlett Packard Co Ultrasonic signal apparatus
US3532911A (en) * 1968-07-26 1970-10-06 Us Navy Dynamic braking of acoustic transducers

Also Published As

Publication number Publication date
FR2259508A1 (fr) 1975-08-22
DE2502009A1 (de) 1975-08-14
US3984704A (en) 1976-10-05

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Legal Events

Date Code Title Description
ST Notification of lapse