NL7906957A - Luidsprekend telefoontoestel, welke voor zacht spreken is voorzien van een handapparaat. - Google Patents

Luidsprekend telefoontoestel, welke voor zacht spreken is voorzien van een handapparaat. Download PDF

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Publication number
NL7906957A
NL7906957A NL7906957A NL7906957A NL7906957A NL 7906957 A NL7906957 A NL 7906957A NL 7906957 A NL7906957 A NL 7906957A NL 7906957 A NL7906957 A NL 7906957A NL 7906957 A NL7906957 A NL 7906957A
Authority
NL
Netherlands
Prior art keywords
ultrasonic
loudspeaker
telephone
channel
pulses
Prior art date
Application number
NL7906957A
Other languages
English (en)
Dutch (nl)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Priority to NL7906957A priority Critical patent/NL7906957A/nl
Priority to US06/183,865 priority patent/US4396799A/en
Priority to DE19803034597 priority patent/DE3034597A1/de
Priority to GB8029775A priority patent/GB2059222B/en
Priority to FR8019845A priority patent/FR2466147A1/fr
Priority to JP12732480A priority patent/JPS5648750A/ja
Publication of NL7906957A publication Critical patent/NL7906957A/nl

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Telephone Set Structure (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transducers For Ultrasonic Waves (AREA)
NL7906957A 1979-09-19 1979-09-19 Luidsprekend telefoontoestel, welke voor zacht spreken is voorzien van een handapparaat. NL7906957A (nl)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL7906957A NL7906957A (nl) 1979-09-19 1979-09-19 Luidsprekend telefoontoestel, welke voor zacht spreken is voorzien van een handapparaat.
US06/183,865 US4396799A (en) 1979-09-19 1980-09-04 Combination of a loudspeaking telephone set and a hand set for soft speaking
DE19803034597 DE3034597A1 (de) 1979-09-19 1980-09-13 Kombination eines lautsprechenden fernsprechapparats und eines handapparates fuer leises sprechen
GB8029775A GB2059222B (en) 1979-09-19 1980-09-15 Loudspeaking telephone instrument
FR8019845A FR2466147A1 (fr) 1979-09-19 1980-09-15 Combinaison d'un appareil telephonique a haut-parleur et d'un combine telephonique
JP12732480A JPS5648750A (en) 1979-09-19 1980-09-16 Loudspeaker telephone set

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7906957A NL7906957A (nl) 1979-09-19 1979-09-19 Luidsprekend telefoontoestel, welke voor zacht spreken is voorzien van een handapparaat.
NL7906957 1979-09-19

Publications (1)

Publication Number Publication Date
NL7906957A true NL7906957A (nl) 1981-03-23

Family

ID=19833867

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7906957A NL7906957A (nl) 1979-09-19 1979-09-19 Luidsprekend telefoontoestel, welke voor zacht spreken is voorzien van een handapparaat.

Country Status (6)

Country Link
US (1) US4396799A (de)
JP (1) JPS5648750A (de)
DE (1) DE3034597A1 (de)
FR (1) FR2466147A1 (de)
GB (1) GB2059222B (de)
NL (1) NL7906957A (de)

Families Citing this family (19)

* 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
DE3412111A1 (de) * 1984-03-31 1985-10-10 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung fuer eine sprachgesteuerte freisprecheinrichtung
US4790971A (en) * 1986-07-09 1988-12-13 Trantek Inc. Shuttle transfer system
JPS63312757A (ja) * 1987-06-15 1988-12-21 Nec Corp ハンズフリ−通話装置
JPH0198752A (ja) * 1987-10-09 1989-04-17 Nippon Denso Co Ltd 無潤滑式送りねじ装置
JPH0251610A (ja) * 1988-08-11 1990-02-21 Tokyo Electric Co Ltd ワイヤ駆動装置
JPH0388059U (de) * 1989-12-26 1991-09-09
JPH0596605U (ja) * 1992-05-29 1993-12-27 エヌティエヌ株式会社 ねじ駆動装置
US5410587A (en) * 1993-03-01 1995-04-25 Matsushita Communication Industrial Corp. Of America Ultrasonic radiotelephone for an automobile
US5701347A (en) * 1994-06-23 1997-12-23 Compaq Computer Corporation Audio system for a personal computer
US5633943A (en) * 1994-09-09 1997-05-27 Compaq Computer Corporation Audio system for a personal computer
US6501836B1 (en) * 1994-09-09 2002-12-31 Compaq Computer Corporation Audio system for a personal computer
US5729604A (en) * 1996-03-14 1998-03-17 Northern Telecom Limited Safety switch for communication device
GB2350969B (en) * 1999-06-07 2003-11-05 Ericsson Telefon Ab L M Loudspeaker volume range control
US6952672B2 (en) * 2001-04-25 2005-10-04 International Business Machines Corporation Audio source position detection and audio adjustment
DE10208096A1 (de) * 2001-08-27 2003-04-10 Siemens Ag Mobiles Kommunikationsendgerät
DE10235235A1 (de) * 2002-08-01 2004-02-19 Siemens Ag Mobiltelefon mit einer Befestigungseinrichtung zur Befestigung des Mobiltelefons am Körper des Benutzers
US9232071B2 (en) 2011-12-16 2016-01-05 Qualcomm Incorporated Optimizing audio processing functions by dynamically compensating for variable distances between speaker(s) and microphone(s) in a mobile device
US9654609B2 (en) * 2011-12-16 2017-05-16 Qualcomm Incorporated Optimizing audio processing functions by dynamically compensating for variable distances between speaker(s) and microphone(s) in an accessory device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3928723A (en) * 1973-07-02 1975-12-23 Kazuo Kai Telephone set with built-in loudspeaker

Also Published As

Publication number Publication date
DE3034597A1 (de) 1981-04-09
FR2466147A1 (fr) 1981-03-27
JPS5648750A (en) 1981-05-02
GB2059222A (en) 1981-04-15
US4396799A (en) 1983-08-02
GB2059222B (en) 1983-09-07

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Legal Events

Date Code Title Description
A1B A search report has been drawn up
A85 Still pending on 85-01-01
BV The patent application has lapsed