Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
AU490108B2 - Duplex communication system - Google Patents
[go: Go Back, main page]

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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/005—Circuits for transducers 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

Similar Documents

Publication Publication Date Title
CA1022238A (en) Optical communication system source-detector pair
AU503357B2 (en) Communication system
AU499505B2 (en) Data transmission systems
CA1018109A (en) Anti-sway system
CA1003514A (en) Communication housing
AU500019B2 (en) Cabletelevision system
AU3736171A (en) Communication system
CA1031953A (en) Glass-reacted-ceramic system
CA1030453A (en) Duplex filter system
AU499643B2 (en) Transmission system
AU500103B2 (en) Communication system
CA1010983A (en) Data transmission system
AU501571B2 (en) Communications system
IL47446A0 (en) Communication system
AU500993B2 (en) Transmission system
AU490108B2 (en) Duplex communication system
AU494880B2 (en) Communication system
AU490487B1 (en) Ticketing system
AU478903B2 (en) Inter-bag communication means
AU8285875A (en) Inter-bag communication means
AU494363B2 (en) Telecommunication system
AU497930B2 (en) Communication system
AU494893B2 (en) Duplex voice communication system
AU487856B2 (en) Telecommunication systems
AU496506B2 (en) Telecommunication systems