FR2168396B1 - - Google Patents

Info

Publication number
FR2168396B1
FR2168396B1 FR7301450A FR7301450A FR2168396B1 FR 2168396 B1 FR2168396 B1 FR 2168396B1 FR 7301450 A FR7301450 A FR 7301450A FR 7301450 A FR7301450 A FR 7301450A FR 2168396 B1 FR2168396 B1 FR 2168396B1
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
FR7301450A
Other languages
French (fr)
Other versions
FR2168396A1 (it
Inventor
O Brunnert
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of FR2168396A1 publication Critical patent/FR2168396A1/fr
Application granted granted Critical
Publication of FR2168396B1 publication Critical patent/FR2168396B1/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
    • H04R17/02—Microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
FR7301450A 1972-01-18 1973-01-16 Expired FR2168396B1 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2202254 1972-01-18

Publications (2)

Publication Number Publication Date
FR2168396A1 FR2168396A1 (it) 1973-08-31
FR2168396B1 true FR2168396B1 (it) 1979-01-26

Family

ID=5833327

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7301450A Expired FR2168396B1 (it) 1972-01-18 1973-01-16

Country Status (5)

Country Link
DE (1) DE2202254C2 (it)
FR (1) FR2168396B1 (it)
GB (1) GB1402352A (it)
IT (1) IT978221B (it)
SE (1) SE377261B (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2831377A1 (de) * 1978-07-17 1980-01-31 Siemens Ag Elektroakustischer wandler
US4228379A (en) * 1978-08-28 1980-10-14 American District Telegraph Company Diaphragm type piezoelectric electroacoustic transducer
US4337640A (en) * 1979-04-10 1982-07-06 Nissan Motor Co., Ltd. Knocking sensor
DE3041742C2 (de) * 1980-11-05 1982-10-28 Siemens AG, 1000 Berlin und 8000 München Luftschallgeber
DE102007003280A1 (de) * 2007-01-23 2008-07-24 Epcos Ag Piezoelektrisches Bauelement
DE102011005249B4 (de) * 2011-03-08 2013-03-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung zur Wandlung mechanischer Energie in elektrische Energie und Verfahren zu ihrer Herstellung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1072621A (fr) * 1953-01-09 1954-09-14 Sodet Microphone
US2836738A (en) * 1956-05-02 1958-05-27 Joseph W Crownover Prestressed piezo crystal
DE1165667B (de) * 1962-06-28 1964-03-19 Siemens Ag Piezoelektrischer Biegeschwinger
GB1159337A (en) * 1966-06-13 1969-07-23 Motorola Inc Piezoelectric Transducers

Also Published As

Publication number Publication date
SE377261B (it) 1975-06-23
FR2168396A1 (it) 1973-08-31
GB1402352A (en) 1975-08-06
DE2202254C2 (de) 1974-01-24
DE2202254B1 (de) 1973-06-20
IT978221B (it) 1974-09-20

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Legal Events

Date Code Title Description
ST Notification of lapse