ZA733081B - Improvements in or relating to electro-acoustic transducers - Google Patents

Improvements in or relating to electro-acoustic transducers

Info

Publication number
ZA733081B
ZA733081B ZA733081A ZA733081A ZA733081B ZA 733081 B ZA733081 B ZA 733081B ZA 733081 A ZA733081 A ZA 733081A ZA 733081 A ZA733081 A ZA 733081A ZA 733081 B ZA733081 B ZA 733081B
Authority
ZA
South Africa
Prior art keywords
electro
relating
acoustic transducers
transducers
acoustic
Prior art date
Application number
ZA733081A
Other languages
English (en)
Inventor
E 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 ZA733081B publication Critical patent/ZA733081B/xx

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

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Telephone Set Structure (AREA)
ZA733081A 1972-05-15 1973-05-07 Improvements in or relating to electro-acoustic transducers ZA733081B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722223531 DE2223531B1 (de) 1972-05-15 1972-05-15 Elektroakustischer wandler

Publications (1)

Publication Number Publication Date
ZA733081B true ZA733081B (en) 1974-04-24

Family

ID=5844876

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA733081A ZA733081B (en) 1972-05-15 1973-05-07 Improvements in or relating to electro-acoustic transducers

Country Status (15)

Country Link
US (1) US4027115A (da)
JP (1) JPS5123841B2 (da)
AR (1) AR193949A1 (da)
AT (1) AT327300B (da)
BE (1) BE799551A (da)
BR (1) BR7303497D0 (da)
CH (1) CH565495A5 (da)
DE (1) DE2223531B1 (da)
FR (1) FR2184681B1 (da)
GB (1) GB1434056A (da)
IT (1) IT987330B (da)
LU (1) LU67591A1 (da)
NL (1) NL7305600A (da)
SE (1) SE383244B (da)
ZA (1) ZA733081B (da)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5744397Y2 (da) * 1977-05-11 1982-09-30
DE2831377A1 (de) * 1978-07-17 1980-01-31 Siemens Ag Elektroakustischer wandler
CH642503A5 (en) * 1979-08-02 1984-04-13 Landis & Gyr Ag Ultrasound converter
DE2937922A1 (de) * 1979-09-19 1981-04-09 Siemens AG, 1000 Berlin und 8000 München Piezoelektrischer wandler
JPS5791100A (en) * 1980-11-27 1982-06-07 Nippon Telegr & Teleph Corp <Ntt> Ceramic piezoelectric type receiver
DE3446183A1 (de) * 1984-12-18 1986-06-26 Siemens AG, 1000 Berlin und 8000 München Piezoelektrischer wandler
GB2168875A (en) * 1984-12-19 1986-06-25 Philips Electronic Associated Electroacoustic calling device
JPS62188459A (ja) * 1986-02-13 1987-08-18 Matsushita Electric Ind Co Ltd スピ−カ内蔵型電話機
DE102006028212A1 (de) * 2006-06-14 2007-12-20 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1646628A (en) * 1927-10-25 James g
DE410304C (de) * 1920-09-28 1925-03-16 Signal Ges M B H Akustischer Apparat fuer Fernsprechzwecke mit zwei oder mehreren abgestimmten, miteinander gekoppelten selbstaendigen Schwingungsgebilden
DK35869C (da) * 1924-10-16 1926-04-12 Hans Christian Skaarup Ørestykke til Telefoner og lignende Apparater.
FR715926A (fr) * 1930-04-25 1931-12-11 Pintsch Julius Ag Ouverture variable d'émetteur de son
US2236568A (en) * 1939-07-29 1941-04-01 Bell Telephone Labor Inc Receiver cap acoustic filter
DE1188657B (de) * 1962-04-27 1965-03-11 Siemens Ag Anordnung zur Frequenzgangverbesserung eines elektroakustischen Wandlers
CH528197A (de) * 1971-12-20 1972-09-15 Ibm Gehäuseanordnung mit einem elektro-akustischen Wandler, und Verwendung derselben in einem Telefonapparat einer Nachrichtenübertragungsanlage mit PCM-Codierung

Also Published As

Publication number Publication date
BR7303497D0 (pt) 1974-07-11
ATA288273A (de) 1975-04-15
LU67591A1 (da) 1973-07-24
FR2184681A1 (da) 1973-12-28
GB1434056A (en) 1976-04-28
NL7305600A (da) 1973-11-19
AR193949A1 (es) 1973-05-31
DE2223531B1 (de) 1973-11-08
AT327300B (de) 1976-01-26
CH565495A5 (da) 1975-08-15
JPS5123841B2 (da) 1976-07-20
US4027115A (en) 1977-05-31
IT987330B (it) 1975-02-20
FR2184681B1 (da) 1979-05-04
SE383244B (sv) 1976-03-01
DE2223531A1 (da) 1973-11-08
JPS4950918A (da) 1974-05-17
BE799551A (fr) 1973-11-16

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