CA2061388A1 - Telephone a haut-parleur dote d'un nouveau type de circuit eliminateur de bruit - Google Patents

Telephone a haut-parleur dote d'un nouveau type de circuit eliminateur de bruit

Info

Publication number
CA2061388A1
CA2061388A1 CA 2061388 CA2061388A CA2061388A1 CA 2061388 A1 CA2061388 A1 CA 2061388A1 CA 2061388 CA2061388 CA 2061388 CA 2061388 A CA2061388 A CA 2061388A CA 2061388 A1 CA2061388 A1 CA 2061388A1
Authority
CA
Canada
Prior art keywords
level
attenuator
drive
signal
local
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.)
Granted
Application number
CA 2061388
Other languages
English (en)
Other versions
CA2061388C (fr
Inventor
Yutaka Tomiyori
Tadashi Eguchi
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.)
NEC Corp
Original Assignee
Yutaka Tomiyori
Tadashi Eguchi
Nec Corporation
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
Priority to JP03045463A priority Critical patent/JP3076072B2/ja
Priority to JP45463/1991 priority
Application filed by Yutaka Tomiyori, Tadashi Eguchi, Nec Corporation filed Critical Yutaka Tomiyori
Publication of CA2061388A1 publication Critical patent/CA2061388A1/fr
Application granted granted Critical
Publication of CA2061388C publication Critical patent/CA2061388C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Interconnection arrangements not involving centralised switching
    • H04M9/08Two-way loud-speaking telephone systems with means for suppressing echoes or otherwise conditioning for one or other direction of traffic
    • H04M9/10Two-way loud-speaking telephone systems with means for suppressing echoes or otherwise conditioning for one or other direction of traffic with switching of direction of transmission by voice frequency
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Interconnection arrangements not involving centralised switching
    • H04M9/08Two-way loud-speaking telephone systems with means for suppressing echoes or otherwise conditioning for one or other direction of traffic
CA 2061388 1991-02-19 1992-02-18 Telephone a haut-parleur dote d'un nouveau type de circuit eliminateur de bruit Expired - Fee Related CA2061388C (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP03045463A JP3076072B2 (ja) 1991-02-19 1991-02-19 拡声電話装置および該装置に用いる騒音抑圧回路
JP45463/1991 1991-02-19

Publications (2)

Publication Number Publication Date
CA2061388A1 true CA2061388A1 (fr) 1992-08-20
CA2061388C CA2061388C (fr) 1996-06-18

Family

ID=12720065

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2061388 Expired - Fee Related CA2061388C (fr) 1991-02-19 1992-02-18 Telephone a haut-parleur dote d'un nouveau type de circuit eliminateur de bruit

Country Status (7)

Country Link
US (1) US5459786A (fr)
EP (2) EP0781029B1 (fr)
JP (1) JP3076072B2 (fr)
AU (1) AU655626B2 (fr)
CA (1) CA2061388C (fr)
DE (2) DE69233473T2 (fr)
ES (1) ES2114912T3 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06216986A (ja) * 1993-01-19 1994-08-05 Mitsubishi Electric Corp ハンズフリー通話回路
JPH07297900A (ja) * 1994-04-26 1995-11-10 Mitsubishi Electric Corp 騒音対策通話機
JP2928130B2 (ja) * 1995-04-19 1999-08-03 埼玉日本電気株式会社 ハンズフリー通信装置
US5966438A (en) * 1996-03-05 1999-10-12 Ericsson Inc. Method and apparatus for adaptive volume control for a radiotelephone
US5787165A (en) * 1996-12-13 1998-07-28 Ericsson Inc. Handsfree radiotelephone having dynamic path attenuation control for echo suppression
JP3220979B2 (ja) * 1998-01-09 2001-10-22 日本電気株式会社 音声スイッチ
US7310420B2 (en) * 2004-04-28 2007-12-18 Gn Netcom A/S Telephone headset amplifier with noise blanking capability
CN101741965B (zh) * 2008-11-27 2012-10-03 博通集成电路(上海)有限公司 衰减输入信号的方法及静噪装置
JP5168162B2 (ja) * 2009-01-16 2013-03-21 沖電気工業株式会社 音信号調整装置、プログラム及び方法、並びに、電話装置
JP5228932B2 (ja) * 2009-01-16 2013-07-03 沖電気工業株式会社 音信号調整装置、プログラム及び方法、並びに、電話装置
US9518241B2 (en) 2010-02-01 2016-12-13 Virginia Tech Intellectual Properties, Inc. Method of separating and de-watering fine particles
CN102834181B (zh) 2010-02-01 2015-07-15 弗吉尼亚科技知识产权公司 粉煤的清洁和脱水
US8478359B2 (en) * 2010-06-04 2013-07-02 Apple Inc. User interface tone echo cancellation
US9496841B2 (en) * 2010-10-21 2016-11-15 Nokia Technologies Oy Recording level adjustment using a distance to a sound source
EP3613540A1 (fr) * 2011-12-31 2020-02-26 Saint-Gobain Abrasives, Inc. Article abrasif à répartition irrégulière d'ouvertures
KR101868678B1 (ko) * 2016-02-25 2018-06-18 정민시 접이식 온열의자

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135590A (en) * 1976-07-26 1979-01-23 Gaulder Clifford F Noise suppressor system
DE2907361C2 (fr) * 1979-02-24 1982-06-09 Standard Elektrik Lorenz Ag, 7000 Stuttgart, De
JPS5923668B2 (fr) * 1979-03-26 1984-06-04 Oki Electric Ind Co Ltd
US4600902A (en) * 1983-07-01 1986-07-15 Wegener Communications, Inc. Compandor noise reduction circuit
JPS61195055A (en) * 1985-02-25 1986-08-29 Matsushita Electric Works Ltd Voice switching circuit for loudspeaking telephone set
US4715063A (en) * 1985-08-20 1987-12-22 Motorola, Inc. Speakerphone for radio and landline telephones
DE3570569D1 (en) * 1985-09-03 1989-06-29 Motorola Inc Hands-free control system for a radiotelephone
ES2037128T3 (es) * 1987-05-15 1993-06-16 Alcatel N.V. Circuito de control de voz para un terminal de telecomunicaciones.
CA1291837C (fr) * 1987-07-15 1991-11-05 Juro Ohga Poste telephonique a suppression du bruit
US4847897A (en) * 1987-12-11 1989-07-11 American Telephone And Telegraph Company Adaptive expander for telephones
JPH01212950A (en) * 1988-02-19 1989-08-25 Matsushita Electric Ind Co Ltd Telephone system
JPH01220509A (en) * 1988-02-26 1989-09-04 Matsushita Electric Ind Co Ltd Signal suppressing circuit

Also Published As

Publication number Publication date
JPH04264860A (en) 1992-09-21
AU655626B2 (en) 1995-01-05
ES2114912T3 (es) 1998-06-16
DE69225258T2 (de) 1998-12-03
EP0781029B1 (fr) 2005-01-26
DE69233473D1 (de) 2005-03-03
EP0500356A2 (fr) 1992-08-26
AU1110992A (en) 1992-08-27
JP3076072B2 (ja) 2000-08-14
EP0781029A2 (fr) 1997-06-25
CA2061388C (fr) 1996-06-18
US5459786A (en) 1995-10-17
EP0500356B1 (fr) 1998-04-29
DE69233473T2 (de) 2006-02-16
EP0500356A3 (en) 1993-06-30
EP0781029A3 (fr) 2003-07-09
DE69225258D1 (de) 1998-06-04

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Legal Events

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