DE1156442B - Schaltungsanordnung zur Verminderung der Hintergrundgeraeuschempfindlichkeit von sprachgesteuerten Lautfernsprechgeraeten - Google Patents

Schaltungsanordnung zur Verminderung der Hintergrundgeraeuschempfindlichkeit von sprachgesteuerten Lautfernsprechgeraeten

Info

Publication number
DE1156442B
DE1156442B DEW30564A DEW0030564A DE1156442B DE 1156442 B DE1156442 B DE 1156442B DE W30564 A DEW30564 A DE W30564A DE W0030564 A DEW0030564 A DE W0030564A DE 1156442 B DE1156442 B DE 1156442B
Authority
DE
Germany
Prior art keywords
background noise
diode
channel
control circuit
rectifier
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.)
Pending
Application number
DEW30564A
Other languages
German (de)
English (en)
Inventor
William Frank Clemency
Walter Deming Goodale Jun
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of DE1156442B publication Critical patent/DE1156442B/de
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • 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
    • H04B1/44—Transmit/receive switching
    • H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
DEW30564A 1960-10-04 1961-08-17 Schaltungsanordnung zur Verminderung der Hintergrundgeraeuschempfindlichkeit von sprachgesteuerten Lautfernsprechgeraeten Pending DE1156442B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60476A US3171901A (en) 1960-10-04 1960-10-04 Loud-speaking telephone

Publications (1)

Publication Number Publication Date
DE1156442B true DE1156442B (de) 1963-10-31

Family

ID=22029721

Family Applications (1)

Application Number Title Priority Date Filing Date
DEW30564A Pending DE1156442B (de) 1960-10-04 1961-08-17 Schaltungsanordnung zur Verminderung der Hintergrundgeraeuschempfindlichkeit von sprachgesteuerten Lautfernsprechgeraeten

Country Status (6)

Country Link
US (1) US3171901A (en, 2012)
JP (1) JPS3823229B1 (en, 2012)
BE (1) BE608354A (en, 2012)
DE (1) DE1156442B (en, 2012)
GB (1) GB916545A (en, 2012)
NL (1) NL267461A (en, 2012)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1280331B (de) * 1964-08-14 1968-10-17 Int Standard Electric Corp Sprachgesteuerter Zweikanalverstaerker fuer Gegensprechanlagen, insbesondere in Fernsprechanlagen
DE1298572B (de) * 1967-03-17 1969-07-03 Siemens Ag Gegen- oder Wechselsprechanlage
FR2527403A1 (fr) * 1982-05-21 1983-11-25 Mitel Corp Systeme et circuit de telephone a haut-parleur
DK152637B (da) * 1974-10-29 1988-03-28 Maxman Ag System til styring af taleretningen i duplekssamtaleanlaeg

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1029163A (en) * 1964-05-29 1966-05-11 Standard Telephones Cables Ltd Improvements in or relating to telephone sets
US3372239A (en) * 1964-07-01 1968-03-05 Bell Telephone Labor Inc Voice-switched interphone system
US3395255A (en) * 1964-07-01 1968-07-30 Bell Telephone Labor Inc Loudspeaking telephone
US3423531A (en) * 1965-08-16 1969-01-21 Itt Voice controlled amplifier
SE339704B (en, 2012) * 1970-12-22 1971-10-18 Ericsson Telefon Ab L M
SE365375B (en, 2012) * 1972-12-18 1974-03-18 Ericsson Telefon Ab L M
US3787640A (en) * 1972-12-26 1974-01-22 Bell Telephone Labor Inc Key telephone intercom circuit
US4155041A (en) 1976-05-13 1979-05-15 Burns Richard C System for reducing noise transients
US4076968A (en) * 1976-09-02 1978-02-28 Bell Telephone Laboratories, Incorporated Telephone ringer intensity control responsive to ambient noise
US4490582A (en) * 1983-02-18 1984-12-25 At&T Information Systems Inc. Speakerphone control circuit
GB2137458B (en) * 1983-03-01 1986-11-19 Standard Telephones Cables Ltd Digital handsfree telephone
US4492824A (en) * 1983-08-11 1985-01-08 At&T Bell Laboratories Speakerphone linear comparator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1814018A (en) * 1928-06-06 1931-07-14 American Telephone & Telegraph Means for controlling sensitivity of voice operated devices
DE1034696B (de) * 1956-04-27 1958-07-24 Telefunken Gmbh Gegensprechanlage fuer den Sprechbetrieb in Raeumen mit hohem Stoerpegel
DE1066625B (en, 2012) * 1963-09-30 1959-10-08

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE882420C (de) * 1938-04-12 1953-07-09 Siemens Ag Schaltungsanordnung fuer Rueckkopplungssperren in Lautfernsprechanlagen
US2183389A (en) * 1939-01-14 1939-12-12 Bell Telephone Labor Inc Indicating circuit
GB839975A (en) * 1955-07-28 1960-06-29 Telephone Mfg Co Ltd Improvements in and relating to signal switched telecommunication circuits
NL225471A (en, 2012) * 1957-11-26 1900-01-01

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1814018A (en) * 1928-06-06 1931-07-14 American Telephone & Telegraph Means for controlling sensitivity of voice operated devices
DE1034696B (de) * 1956-04-27 1958-07-24 Telefunken Gmbh Gegensprechanlage fuer den Sprechbetrieb in Raeumen mit hohem Stoerpegel
DE1066625B (en, 2012) * 1963-09-30 1959-10-08

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1280331B (de) * 1964-08-14 1968-10-17 Int Standard Electric Corp Sprachgesteuerter Zweikanalverstaerker fuer Gegensprechanlagen, insbesondere in Fernsprechanlagen
DE1298572B (de) * 1967-03-17 1969-07-03 Siemens Ag Gegen- oder Wechselsprechanlage
DK152637B (da) * 1974-10-29 1988-03-28 Maxman Ag System til styring af taleretningen i duplekssamtaleanlaeg
FR2527403A1 (fr) * 1982-05-21 1983-11-25 Mitel Corp Systeme et circuit de telephone a haut-parleur

Also Published As

Publication number Publication date
JPS3823229B1 (en, 2012) 1963-10-31
GB916545A (en) 1963-01-23
US3171901A (en) 1965-03-02
BE608354A (fr) 1962-01-15
NL267461A (en, 2012) 1900-01-01

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