BR7904525A - Transformador eletro-acustico - Google Patents

Transformador eletro-acustico

Info

Publication number: BR7904525A
Authority: BR; Brazil
Prior art keywords: acoustic transformer; electric acoustic; electric; transformer; acoustic
Prior art date: 1978-07-17

Application number

BR7904525A

Other languages

English (en)

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.)

1978-07-17

Filing date

1979-07-16

Publication date

1980-04-08

1979-07-16 Application filed by Siemens Ag filed Critical Siemens Ag

1980-04-08 Publication of BR7904525A publication Critical patent/BR7904525A/pt

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 Transformador eletro-acustico BR7904525A (pt)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE19782831377 DE2831377A1 (de)	1978-07-17	1978-07-17	Elektroakustischer wandler

Publications (1)

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

Family

ID=6044600

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BR7904525A BR7904525A (pt)	1978-07-17	1979-07-16	Transformador eletro-acustico

Country Status (8)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3232177A1 (de) *	1982-08-30	1984-03-01	Siemens AG, 1000 Berlin und 8000 München	Piezoelektrischer wandler
FR2599207B1 (fr) *	1986-05-23	1989-05-26	Labo Electronique Physique	Dispositif du type haut-parleur piezoelectrique
DE59907398D1 (de) *	1999-01-11	2003-11-20	Siemens Ag	Passives mikrofon mit drahtloser übertragung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS4217838Y1 (pt) *	1964-09-07	1967-10-16
JPS4840392A (pt) *	1971-09-25	1973-06-13
DE2202254C2 (de) *	1972-01-18	1974-01-24	Siemens Ag	Elektroakustischer Wandler, insbesondere Mikrophon für Fernsprechanlagen
US3786202A (en) *	1972-04-10	1974-01-15	Motorola Inc	Acoustic transducer including piezoelectric driving element
DE2223531B1 (de) *	1972-05-15	1973-11-08	Siemens Ag	Elektroakustischer wandler
JPS4922090A (pt) *	1972-06-17	1974-02-27
JPS5245439B2 (pt) *	1972-08-31	1977-11-16

1978
- 1978-07-17 DE DE19782831377 patent/DE2831377A1/de not_active Withdrawn
1979
- 1979-06-19 EP EP79102026A patent/EP0007435A1/de not_active Withdrawn
- 1979-06-26 AR AR27705579A patent/AR216250A1/es active
- 1979-06-27 IN IN657/CAL/79A patent/IN149955B/en unknown
- 1979-07-11 GB GB7924085A patent/GB2025733A/en not_active Withdrawn
- 1979-07-16 AU AU48929/79A patent/AU4892979A/en not_active Abandoned
- 1979-07-16 BR BR7904525A patent/BR7904525A/pt unknown
- 1979-07-16 JP JP8938579A patent/JPS5516597A/ja active Pending

Also Published As

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

Similar Documents

Publication	Publication Date	Title
IT7969310A0 (it)	1979-11-29	Trasformatore elettrico
BR7904224A (pt)	1980-04-01	Conjunto de bobina eletrica
BR7904532A (pt)	1980-04-08	Transformador eletro-acustico
SE7910145L (sv)	1980-06-17	Elektrisk spole
MX147391A (es)	1982-11-26	Aparato inductor electrico mejorado
BR7902662A (pt)	1979-11-27	Transformador de potencia
DK74879A (da)	1979-08-23	Hoejtaler
FI792560A (fi)	1980-02-18	Elektriskt prisraeknande vaog saerskilt butikbordsvaog
IT1128792B (it)	1986-06-04	Trasformatore elettrico
IT1123782B (it)	1986-04-30	Parete-schermo di isolamento acustico
TR20427A (tr)	1981-07-02	Elektrik suepuergeleri
BR7903760A (pt)	1980-02-05	Transformador transformador
SE7801377L (sv)	1979-08-08	Elektrisk forsterkare
DE2967567D1 (de)	1986-02-27	Transformer cores
NO150180C (no)	1984-08-29	Elektrisk forbindelse
BR7902403A (pt)	1979-10-23	Conjunto eletrico
BR7901040A (pt)	1979-10-02	Transdutor de corrente
DK148209C (da)	1985-09-23	Elektrisk forbindelsesorgan
DK98479A (da)	1979-09-14	Rummelfri mikrofonkombination
BR7904525A (pt)	1980-04-08	Transformador eletro-acustico
SE7908632L (sv)	1980-04-19	Hogtalare
DK147520C (da)	1985-07-22	Elektrisk forbindelsesorgan
BR7904528A (pt)	1980-04-08	Transformador eletro-acustico
ES247060Y (es)	1980-09-16	Bobina
BR7904530A (pt)	1980-04-08	Transformador eletro-acustico