IT978221B - ELECTROACOUSTIC TRANSDUCER ESPECIALLY MICROPHONE FOR TELEPHONE SYSTEMS - Google Patents

ELECTROACOUSTIC TRANSDUCER ESPECIALLY MICROPHONE FOR TELEPHONE SYSTEMS

Info

Publication number
IT978221B
IT978221B IT1929173A IT1929173A IT978221B IT 978221 B IT978221 B IT 978221B IT 1929173 A IT1929173 A IT 1929173A IT 1929173 A IT1929173 A IT 1929173A IT 978221 B IT978221 B IT 978221B
Authority
IT
Italy
Prior art keywords
electroacoustic transducer
telephone systems
transducer especially
especially microphone
microphone
Prior art date
Application number
IT1929173A
Other languages
Italian (it)
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
Application granted granted Critical
Publication of IT978221B publication Critical patent/IT978221B/en

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)
IT1929173A 1972-01-18 1973-01-17 ELECTROACOUSTIC TRANSDUCER ESPECIALLY MICROPHONE FOR TELEPHONE SYSTEMS IT978221B (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
IT978221B true IT978221B (en) 1974-09-20

Family

ID=5833327

Family Applications (1)

Application Number Title Priority Date Filing Date
IT1929173A IT978221B (en) 1972-01-18 1973-01-17 ELECTROACOUSTIC TRANSDUCER ESPECIALLY MICROPHONE FOR TELEPHONE SYSTEMS

Country Status (5)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2831377A1 (en) * 1978-07-17 1980-01-31 Siemens Ag ELECTROACOUSTIC CONVERTER
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 (en) * 1980-11-05 1982-10-28 Siemens AG, 1000 Berlin und 8000 München Airborne sounder
DE102007003280A1 (en) 2007-01-23 2008-07-24 Epcos Ag Piezoelectric component
DE102011005249B4 (en) * 2011-03-08 2013-03-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Device for converting mechanical energy into electrical energy and method for its production

Family Cites Families (4)

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

Also Published As

Publication number Publication date
SE377261B (en) 1975-06-23
DE2202254C2 (en) 1974-01-24
FR2168396B1 (en) 1979-01-26
DE2202254B1 (en) 1973-06-20
FR2168396A1 (en) 1973-08-31
GB1402352A (en) 1975-08-06

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