FR2233784B1 - - Google Patents

Info

Publication number
FR2233784B1
FR2233784B1 FR7420130A FR7420130A FR2233784B1 FR 2233784 B1 FR2233784 B1 FR 2233784B1 FR 7420130 A FR7420130 A FR 7420130A FR 7420130 A FR7420130 A FR 7420130A FR 2233784 B1 FR2233784 B1 FR 2233784B1
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
FR7420130A
Other versions
FR2233784A1 (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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken 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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2233784A1 publication Critical patent/FR2233784A1/fr
Application granted granted Critical
Publication of FR2233784B1 publication Critical patent/FR2233784B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
FR7420130A 1973-06-12 1974-06-11 Expired FR2233784B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7308103A NL7308103A (fr) 1973-06-12 1973-06-12

Publications (2)

Publication Number Publication Date
FR2233784A1 FR2233784A1 (fr) 1975-01-10
FR2233784B1 true FR2233784B1 (fr) 1977-10-07

Family

ID=19819047

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7420130A Expired FR2233784B1 (fr) 1973-06-12 1974-06-11

Country Status (16)

Country Link
US (1) US3941932A (fr)
JP (2) JPS5034223A (fr)
AT (1) AT332919B (fr)
BE (1) BE816140A (fr)
BR (1) BR7404755D0 (fr)
CA (1) CA1003554A (fr)
CH (1) CH569397A5 (fr)
DE (1) DE2426474B2 (fr)
DK (1) DK139450B (fr)
ES (1) ES427139A1 (fr)
FR (1) FR2233784B1 (fr)
GB (1) GB1471190A (fr)
IT (1) IT1011942B (fr)
NL (1) NL7308103A (fr)
SE (1) SE395103B (fr)
ZA (1) ZA743498B (fr)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5852780Y2 (ja) * 1980-07-19 1983-12-01 パイオニア株式会社 マイクロホン
JPS58182998A (ja) * 1982-04-20 1983-10-26 Pioneer Electronic Corp Ｍｆｂ型スピ−カ
US4573189A (en) * 1983-10-19 1986-02-25 Velodyne Acoustics, Inc. Loudspeaker with high frequency motional feedback
DE3429147A1 (de) * 1984-08-08 1986-02-20 Friedrich 6650 Homburg Müller Anordnung zur akustischen gegenkopplung von lautsprechern
JPS6249395U (fr) * 1985-09-17 1987-03-26
US4823391A (en) * 1986-07-22 1989-04-18 Schwartz David M Sound reproduction system
US4718098A (en) * 1986-07-22 1988-01-05 Ashworth William J Multi-diaphragm artificial reverberation device
US5889871A (en) * 1993-10-18 1999-03-30 The United States Of America As Represented By The Secretary Of The Navy Surface-laminated piezoelectric-film sound transducer
US5652801A (en) * 1994-05-02 1997-07-29 Aura Systems, Inc. Resonance damper for piezoelectric transducer
US5727076A (en) * 1994-05-02 1998-03-10 Aura Systems, Inc. Audio transducer having piezoelectric device
US5901231A (en) * 1995-09-25 1999-05-04 Noise Cancellation Technologies, Inc. Piezo speaker for improved passenger cabin audio systems
US6243472B1 (en) * 1997-09-17 2001-06-05 Frank Albert Bilan Fully integrated amplified loudspeaker
US6584204B1 (en) 1997-12-11 2003-06-24 The Regents Of The University Of California Loudspeaker system with feedback control for improved bandwidth and distortion reduction
DE19843079A1 (de) * 1998-09-19 2000-03-23 Nokia Deutschland Gmbh Multiresonanzplatte
ATE370633T1 (de) * 2001-09-10 2007-09-15 Sonion As Miniaturlautsprecher mit integrierter signalverarbeitungselektronik
CA2408045A1 (fr) * 2001-10-16 2003-04-16 Audio Products International Corp. Haut-parleur a asservissement a grand deplacement
US7120270B2 (en) * 2002-09-18 2006-10-10 Bose Corporation Audio device heat transferring
JP4141853B2 (ja) * 2003-01-30 2008-08-27 三菱電機株式会社 スピーカ
US9084051B2 (en) * 2011-02-18 2015-07-14 The Rockefeller University Unidirectional mechanical amplification in a microphone
USD767541S1 (en) * 2014-04-23 2016-09-27 Martin Audio Limited Loudspeaker
JP6614158B2 (ja) * 2014-12-02 2019-12-04 ソニー株式会社 スピーカー装置
USD791106S1 (en) * 2014-12-11 2017-07-04 Sony Corporation Speaker
USD848402S1 (en) 2014-12-11 2019-05-14 Sony Corporation Speaker
GB2620787A (en) 2022-07-22 2024-01-24 Gp Acoustics Uk Ltd Loudspeakers

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1932460A (en) * 1932-04-16 1933-10-31 Patent Engineering Corp Speaker amplifier
US2860183A (en) * 1954-02-01 1958-11-11 Conrad Ivan Willard Sound reproducing system
US2948778A (en) * 1956-05-07 1960-08-09 Warner W Clements Sound reproducing means
FR1370980A (fr) * 1962-11-28 1964-08-28 Brown Ltd S G Perfectionnements aux transducteurs piézo-électriques
NL298464A (fr) * 1963-06-21
JPS4120247Y1 (fr) * 1964-07-18 1966-09-26

Also Published As

Publication number Publication date
NL7308103A (fr) 1974-12-16
BE816140A (fr) 1974-12-10
DE2426474B2 (de) 1977-06-02
GB1471190A (en) 1977-04-21
DK307774A (fr) 1975-02-03
ES427139A1 (es) 1976-07-16
JPS56105993U (fr) 1981-08-18
JPS5034223A (fr) 1975-04-02
DK139450B (da) 1979-02-19
ATA476274A (de) 1976-02-15
IT1011942B (it) 1977-02-10
ZA743498B (en) 1976-01-28
DE2426474A1 (de) 1975-01-09
JPS605678Y2 (ja) 1985-02-21
SE7407496L (fr) 1974-12-13
SE395103B (sv) 1977-07-25
FR2233784A1 (fr) 1975-01-10
CH569397A5 (fr) 1975-11-14
DK139450C (fr) 1979-07-30
CA1003554A (en) 1977-01-11
BR7404755D0 (pt) 1975-01-21
US3941932A (en) 1976-03-02
AT332919B (de) 1976-10-25
AU6992374A (en) 1975-12-11

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Legal Events

Date Code Title Description
ST Notification of lapse