FR2461412B1 - - Google Patents

Info

Publication number
FR2461412B1
FR2461412B1 FR7917620A FR7917620A FR2461412B1 FR 2461412 B1 FR2461412 B1 FR 2461412B1 FR 7917620 A FR7917620 A FR 7917620A FR 7917620 A FR7917620 A FR 7917620A FR 2461412 B1 FR2461412 B1 FR 2461412B1
Authority
FR
France
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
FR7917620A
Other languages
French (fr)
Other versions
FR2461412A1 (fr
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.)
CONNAN JEAN LOUIS
Original Assignee
CONNAN JEAN LOUIS
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 CONNAN JEAN LOUIS filed Critical CONNAN JEAN LOUIS
Priority to FR7917620A priority Critical patent/FR2461412A1/fr
Publication of FR2461412A1 publication Critical patent/FR2461412A1/fr
Application granted granted Critical
Publication of FR2461412B1 publication Critical patent/FR2461412B1/fr
Granted 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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
FR7917620A 1979-07-06 1979-07-06 Poste telephonique a ecoute amplifiee sur haut-parleur Granted FR2461412A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7917620A FR2461412A1 (fr) 1979-07-06 1979-07-06 Poste telephonique a ecoute amplifiee sur haut-parleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7917620A FR2461412A1 (fr) 1979-07-06 1979-07-06 Poste telephonique a ecoute amplifiee sur haut-parleur

Publications (2)

Publication Number Publication Date
FR2461412A1 FR2461412A1 (fr) 1981-01-30
FR2461412B1 true FR2461412B1 (OSRAM) 1982-01-22

Family

ID=9227623

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7917620A Granted FR2461412A1 (fr) 1979-07-06 1979-07-06 Poste telephonique a ecoute amplifiee sur haut-parleur

Country Status (1)

Country Link
FR (1) FR2461412A1 (OSRAM)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547153A1 (fr) * 1983-06-01 1984-12-07 Constr Telephoniques Procede et circuit de suppression d'oscillations entretenues par effet larsen dans une boucle comprenant un microphone et un haut-parleur
FI73341C (fi) * 1985-08-06 1987-09-10 Outel Oy Mellanfoerstaerkare som anvaends i tvaoledningsfoerbindelser i ett valbart telefonnaet samt foerfarande foer reglering av dess foerstaerkning.
GB8621758D0 (en) * 1986-09-10 1986-10-15 Cass Group Plc Call devices
GB2350969B (en) * 1999-06-07 2003-11-05 Ericsson Telefon Ab L M Loudspeaker volume range control

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2339301A1 (fr) * 1977-01-20 1977-08-19 Int Standard Electric Corp Methode de regulation automatique de niveau pour systeme de reproduction sonore a haut-parleur

Also Published As

Publication number Publication date
FR2461412A1 (fr) 1981-01-30

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Legal Events

Date Code Title Description
ST Notification of lapse