BR7904525A - ELECTRIC ACOUSTIC TRANSFORMER - Google Patents

ELECTRIC ACOUSTIC TRANSFORMER

Info

Publication number
BR7904525A
BR7904525A BR7904525A BR7904525A BR7904525A BR 7904525 A BR7904525 A BR 7904525A BR 7904525 A BR7904525 A BR 7904525A BR 7904525 A BR7904525 A BR 7904525A BR 7904525 A BR7904525 A BR 7904525A
Authority
BR
Brazil
Prior art keywords
acoustic transformer
electric acoustic
electric
transformer
acoustic
Prior art date
Application number
BR7904525A
Other languages
Portuguese (pt)
Inventor
K Walliser
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 BR7904525A publication Critical patent/BR7904525A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transducers For Ultrasonic Waves (AREA)
BR7904525A 1978-07-17 1979-07-16 ELECTRIC ACOUSTIC TRANSFORMER BR7904525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782831377 DE2831377A1 (en) 1978-07-17 1978-07-17 ELECTROACOUSTIC CONVERTER

Publications (1)

Publication Number Publication Date
BR7904525A true BR7904525A (en) 1980-04-08

Family

ID=6044600

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7904525A BR7904525A (en) 1978-07-17 1979-07-16 ELECTRIC ACOUSTIC TRANSFORMER

Country Status (8)

Country Link
EP (1) EP0007435A1 (en)
JP (1) JPS5516597A (en)
AR (1) AR216250A1 (en)
AU (1) AU4892979A (en)
BR (1) BR7904525A (en)
DE (1) DE2831377A1 (en)
GB (1) GB2025733A (en)
IN (1) IN149955B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232177A1 (en) * 1982-08-30 1984-03-01 Siemens AG, 1000 Berlin und 8000 München PIEZOELECTRIC CONVERTER
FR2599207B1 (en) * 1986-05-23 1989-05-26 Labo Electronique Physique PIEZOELECTRIC SPEAKER TYPE DEVICE
WO2000042813A1 (en) * 1999-01-11 2000-07-20 Siemens Aktiengesellschaft Passive microphone with wireless transmission

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4217838Y1 (en) * 1964-09-07 1967-10-16
JPS4840392A (en) * 1971-09-25 1973-06-13
DE2202254C2 (en) * 1972-01-18 1974-01-24 Siemens Ag Electroacoustic transducers, in particular microphones for telephone systems
US3786202A (en) * 1972-04-10 1974-01-15 Motorola Inc Acoustic transducer including piezoelectric driving element
DE2223531B1 (en) * 1972-05-15 1973-11-08 Siemens Ag ELECTROACOUSTIC CONVERTER
JPS4922090A (en) * 1972-06-17 1974-02-27
JPS5245439B2 (en) * 1972-08-31 1977-11-16

Also Published As

Publication number Publication date
GB2025733A (en) 1980-01-23
EP0007435A1 (en) 1980-02-06
AR216250A1 (en) 1979-11-30
DE2831377A1 (en) 1980-01-31
AU4892979A (en) 1980-01-24
JPS5516597A (en) 1980-02-05
IN149955B (en) 1982-06-12

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