FI802943A - PIEZOELEKTRISK OMVANDLARE - Google Patents

PIEZOELEKTRISK OMVANDLARE

Info

Publication number
FI802943A
FI802943A FI802943A FI802943A FI802943A FI 802943 A FI802943 A FI 802943A FI 802943 A FI802943 A FI 802943A FI 802943 A FI802943 A FI 802943A FI 802943 A FI802943 A FI 802943A
Authority
FI
Finland
Prior art keywords
piezoelektrisk
omvandlare
piezoelektrisk omvandlare
Prior art date
Application number
FI802943A
Other languages
Finnish (fi)
Other versions
FI74183B (en
FI74183C (en
Inventor
Klaus Baier
Erwin Martin
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 FI802943A publication Critical patent/FI802943A/en
Publication of FI74183B publication Critical patent/FI74183B/en
Application granted granted Critical
Publication of FI74183C publication Critical patent/FI74183C/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers
    • 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
    • H04R17/10—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
    • 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
FI802943A 1979-09-19 1980-09-18 Piezoelectric converter FI74183C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2937922 1979-09-19
DE19792937922 DE2937922A1 (en) 1979-09-19 1979-09-19 PIEZOELECTRIC CONVERTER

Publications (3)

Publication Number Publication Date
FI802943A true FI802943A (en) 1981-03-20
FI74183B FI74183B (en) 1987-08-31
FI74183C FI74183C (en) 1987-12-10

Family

ID=6081296

Family Applications (1)

Application Number Title Priority Date Filing Date
FI802943A FI74183C (en) 1979-09-19 1980-09-18 Piezoelectric converter

Country Status (10)

Country Link
EP (1) EP0025955B1 (en)
JP (1) JPS5651200A (en)
AR (1) AR223549A1 (en)
AT (1) ATE11478T1 (en)
AU (1) AU538420B2 (en)
BR (1) BR8005981A (en)
DE (1) DE2937922A1 (en)
FI (1) FI74183C (en)
GR (1) GR70029B (en)
ZA (1) ZA805775B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3131349C2 (en) * 1981-08-07 1983-05-11 Rosenthal Technik Ag, 8672 Selb Piezoelectric three-tone generator
US4413198A (en) * 1981-12-30 1983-11-01 Motorola, Inc. Piezoelectric transducer apparatus
DE3446183A1 (en) * 1984-12-18 1986-06-26 Siemens AG, 1000 Berlin und 8000 München Piezo-electric transducer
JPS6295399U (en) * 1985-12-03 1987-06-18
AU588989B2 (en) * 1986-04-10 1989-09-28 Alcatel Australia Limited An improved transducer
DE4311701C2 (en) * 1993-04-08 1999-08-26 Siemens Ag Arrangement for generating acoustic signals, in particular tone calls in telecommunication devices

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB202938A (en) * 1922-02-06 1923-08-07 Signal Gmbh Improvements in acoustic apparatus
DE2119911B2 (en) * 1971-04-23 1973-11-15 Siemens Ag, 1000 Berlin U. 8000 Muenchen Electroacoustic converter, in particular microphone for telephone systems
BE759888A (en) * 1969-12-05 1971-06-04 Siemens Ag ELECTRO-ACOUSTIC TRANSDUCER, ESPECIALLY MICROPHONE FOR TELEPHONE SYSTEMS
GB1370164A (en) * 1972-01-30 1974-10-16 Mullard Ltd Piezoelectric transducer
DE2223531B1 (en) * 1972-05-15 1973-11-08 Siemens Ag ELECTROACOUSTIC CONVERTER
US4006371A (en) * 1973-03-19 1977-02-01 Whitewater Electronics, Inc. Electroacoustical transducer comprising piezoelectric element
US4056741A (en) * 1973-04-18 1977-11-01 Airco, Inc. Audible signal generating apparatus having selectively controlled audible output
US3922672A (en) * 1974-03-04 1975-11-25 Mallory & Co Inc P R Audible alarm device
JPS5330296A (en) * 1976-09-01 1978-03-22 Seiko Instr & Electronics Ltd Electro-acoustic transducer

Also Published As

Publication number Publication date
DE2937922A1 (en) 1981-04-09
AR223549A1 (en) 1981-08-31
BR8005981A (en) 1981-03-31
ATE11478T1 (en) 1985-02-15
GR70029B (en) 1982-07-23
EP0025955A1 (en) 1981-04-01
DE2937922C2 (en) 1988-11-24
JPS5651200A (en) 1981-05-08
ZA805775B (en) 1981-09-30
FI74183B (en) 1987-08-31
AU6250980A (en) 1981-04-09
AU538420B2 (en) 1984-08-16
FI74183C (en) 1987-12-10
EP0025955B1 (en) 1985-01-23

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: SIEMENS AKTIENGESELLSCHAFT