NO792998L - Kommunikasjonsanlegg. - Google Patents

Kommunikasjonsanlegg.

Info

Publication number
NO792998L
NO792998L NO792998A NO792998A NO792998L NO 792998 L NO792998 L NO 792998L NO 792998 A NO792998 A NO 792998A NO 792998 A NO792998 A NO 792998A NO 792998 L NO792998 L NO 792998L
Authority
NO
Norway
Prior art keywords
speech
transmitter
microphone
diodes
infrared rays
Prior art date
Application number
NO792998A
Other languages
English (en)
Norwegian (no)
Inventor
Lennart Skogsberg
Walter Fetz
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of NO792998L publication Critical patent/NO792998L/no

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H04B10/1143—Bidirectional transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • H04M1/737—Characterised by transmission of electromagnetic waves other than radio waves, e.g. infrared waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Transmitters (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Cosmetics (AREA)
  • Medicinal Preparation (AREA)
NO792998A 1978-09-27 1979-09-18 Kommunikasjonsanlegg. NO792998L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7810158A SE7810158L (sv) 1978-09-27 1978-09-27 Infrarodstralningskommunikationssystem

Publications (1)

Publication Number Publication Date
NO792998L true NO792998L (no) 1980-03-28

Family

ID=20335943

Family Applications (1)

Application Number Title Priority Date Filing Date
NO792998A NO792998L (no) 1978-09-27 1979-09-18 Kommunikasjonsanlegg.

Country Status (7)

Country Link
EP (1) EP0009295A1 (en, 2012)
JP (1) JPS5588446A (en, 2012)
CA (1) CA1131315A (en, 2012)
DK (1) DK402979A (en, 2012)
FI (1) FI792940A7 (en, 2012)
NO (1) NO792998L (en, 2012)
SE (1) SE7810158L (en, 2012)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4981139A (en) * 1983-08-11 1991-01-01 Pfohl Robert L Vital signs monitoring and communication system
US4763663A (en) * 1983-08-11 1988-08-16 Vitacomm, Ltd. Esophageal stethoscope and vital signs monitor system
FR2584254A1 (fr) * 1985-06-28 1987-01-02 Braun Bernard Dispositif emetteur-recepteur pour la communication vocale a courte distance
JPS62117361U (en, 2012) * 1986-01-16 1987-07-25
JPS6395336U (en, 2012) * 1986-12-10 1988-06-20
GB2242090A (en) * 1990-02-13 1991-09-18 S V O Limited A communication system
JP2863990B2 (ja) * 1994-11-30 1999-03-03 株式会社ユニトロン 赤外線ワイヤレスマイク
US6418346B1 (en) 1999-12-14 2002-07-09 Medtronic, Inc. Apparatus and method for remote therapy and diagnosis in medical devices via interface systems

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS504909A (en, 2012) * 1973-05-16 1975-01-20
DE2431937C2 (de) * 1974-07-03 1982-04-01 Sennheiser Electronic Kg, 3002 Wedemark Verfahren zur drahtlosen optischen Nachrichtenübertragung
DE2522381A1 (de) * 1975-05-21 1976-12-02 Battelle Institut E V Verfahren und schaltungsanordnung zur anpassung der autoradiolautstaerke an die umgebungsgeraeusche
DE2609283A1 (de) * 1976-02-04 1977-08-18 Franz Osterholzer Drahtloser telefonhoerer
DE2656431A1 (de) * 1976-12-14 1978-06-22 Demolux Vorrichtung fuer die drahtlose uebertragung eines lehrprogrammes in unterrichtsraeumen
DE2701963C3 (de) * 1977-01-19 1980-10-16 Horst Dipl.-Ing. 2804 Lilienthal Nikisch Verfahren zur Zuleitung einer von einem Sender ausgestrahlten Information an das menschliche Gehör und Gehörschutzeinrichtung zur Durchführung des Verfahrens
GB1548145A (en) * 1978-02-21 1979-07-04 Standard Telephones Cables Ltd Telephones

Also Published As

Publication number Publication date
EP0009295A1 (en) 1980-04-02
JPS5588446A (en) 1980-07-04
JPS5756260B2 (en, 2012) 1982-11-29
FI792940A7 (fi) 1981-01-01
DK402979A (da) 1980-03-28
SE7810158L (sv) 1980-03-28
CA1131315A (en) 1982-09-07

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