DE2261600A1 - Tonfrequenzdetektor - Google Patents

Tonfrequenzdetektor

Info

Publication number
DE2261600A1
DE2261600A1 DE19722261600 DE2261600A DE2261600A1 DE 2261600 A1 DE2261600 A1 DE 2261600A1 DE 19722261600 DE19722261600 DE 19722261600 DE 2261600 A DE2261600 A DE 2261600A DE 2261600 A1 DE2261600 A1 DE 2261600A1
Authority
DE
Germany
Prior art keywords
film
electrodes
detector
detector according
typically
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.)
Pending
Application number
DE19722261600
Other languages
German (de)
English (en)
Inventor
Geb Rider Penelope Dorothy Dow
Thomas Raymond Trapnell
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co Ltd
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 Marconi Co Ltd filed Critical Marconi Co Ltd
Publication of DE2261600A1 publication Critical patent/DE2261600A1/de
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
    • H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/005—Piezoelectric transducers; Electrostrictive transducers using a piezoelectric polymer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)
DE19722261600 1972-10-05 1972-12-15 Tonfrequenzdetektor Pending DE2261600A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4592172A GB1410822A (en) 1972-10-05 1972-10-05 Electroacoustic arrangements

Publications (1)

Publication Number Publication Date
DE2261600A1 true DE2261600A1 (de) 1974-04-25

Family

ID=10439108

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19722261600 Pending DE2261600A1 (de) 1972-10-05 1972-12-15 Tonfrequenzdetektor

Country Status (3)

Country Link
DE (1) DE2261600A1 (https=)
GB (1) GB1410822A (https=)
NL (1) NL7313654A (https=)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2944506A1 (de) * 1978-11-05 1980-05-08 Ngk Spark Plug Co Piezoelektrischer wandler fuer elektrische saiteninstrumente und diesen enthaltende tonabnehmer
DE2942641A1 (de) * 1979-10-22 1981-04-30 Deutsche Itt Industries Gmbh, 7800 Freiburg Telefon-sprechkapsel-innenschaltung als kohlemikrophonersatz
WO1986006918A1 (en) * 1985-05-09 1986-11-20 Plessey Overseas Limited Improvements in or relating to microphones

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280018A (en) * 1979-05-14 1981-07-21 Strobotronix, Inc. Integrated piezoelectric sound transducer and preamplifier
US4486869A (en) * 1981-02-25 1984-12-04 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Underwater acoustic devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2944506A1 (de) * 1978-11-05 1980-05-08 Ngk Spark Plug Co Piezoelektrischer wandler fuer elektrische saiteninstrumente und diesen enthaltende tonabnehmer
DE2942641A1 (de) * 1979-10-22 1981-04-30 Deutsche Itt Industries Gmbh, 7800 Freiburg Telefon-sprechkapsel-innenschaltung als kohlemikrophonersatz
WO1986006918A1 (en) * 1985-05-09 1986-11-20 Plessey Overseas Limited Improvements in or relating to microphones

Also Published As

Publication number Publication date
NL7313654A (https=) 1974-04-09
GB1410822A (en) 1975-10-22

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