AU490108B2 - Duplex communication system - Google Patents

Duplex communication system

Info

Publication number
AU490108B2
AU490108B2 AU64206/74A AU6420674A AU490108B2 AU 490108 B2 AU490108 B2 AU 490108B2 AU 64206/74 A AU64206/74 A AU 64206/74A AU 6420674 A AU6420674 A AU 6420674A AU 490108 B2 AU490108 B2 AU 490108B2
Authority
AU
Australia
Prior art keywords
communication system
duplex communication
duplex
communication
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
AU64206/74A
Other versions
AU6420674A (en
Inventor
Zaghloul Mohamed Gabe Saad
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU64206/74A priority Critical patent/AU490108B2/en
Application granted granted Critical
Publication of AU490108B2 publication Critical patent/AU490108B2/en
Publication of AU6420674A publication Critical patent/AU6420674A/en
Expired legal-status Critical Current

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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
    • 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 
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • General Health & Medical Sciences (AREA)
AU64206/74A 1974-01-04 1974-01-04 Duplex communication system Expired AU490108B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU64206/74A AU490108B2 (en) 1974-01-04 1974-01-04 Duplex communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU64206/74A AU490108B2 (en) 1974-01-04 1974-01-04 Duplex communication system

Publications (2)

Publication Number Publication Date
AU490108B2 true AU490108B2 (en) 1975-07-10
AU6420674A AU6420674A (en) 1975-07-10

Family

ID=3748916

Family Applications (1)

Application Number Title Priority Date Filing Date
AU64206/74A Expired AU490108B2 (en) 1974-01-04 1974-01-04 Duplex communication system

Country Status (1)

Country Link
AU (1) AU490108B2 (en)

Also Published As

Publication number Publication date
AU6420674A (en) 1975-07-10

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