BR7404755D0 - Alto-falante tendo uma bobina fonica e um transdutor piezeletrico de realimentacao - Google Patents

Alto-falante tendo uma bobina fonica e um transdutor piezeletrico de realimentacao

Info

Publication number
BR7404755D0
BR7404755D0 BR4755/74A BR475574A BR7404755D0 BR 7404755 D0 BR7404755 D0 BR 7404755D0 BR 4755/74 A BR4755/74 A BR 4755/74A BR 475574 A BR475574 A BR 475574A BR 7404755 D0 BR7404755 D0 BR 7404755D0
Authority
BR
Brazil
Prior art keywords
piezeletric
phonic
transducer
speaker
feedback
Prior art date
Application number
BR4755/74A
Other languages
English (en)
Inventor
Odilon Maurits D Hoogh Guido
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
Publication of BR7404755D0 publication Critical patent/BR7404755D0/pt

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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
BR4755/74A 1973-06-12 1974-06-10 Alto-falante tendo uma bobina fonica e um transdutor piezeletrico de realimentacao BR7404755D0 (pt)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BR7404755D0 true BR7404755D0 (pt) 1975-01-21

Family

ID=19819047

Family Applications (1)

Application Number Title Priority Date Filing Date
BR4755/74A BR7404755D0 (pt) 1973-06-12 1974-06-10 Alto-falante tendo uma bobina fonica e um transdutor piezeletrico de realimentacao

Country Status (16)

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

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 (pt) * 1985-09-17 1987-03-26
US4718098A (en) * 1986-07-22 1988-01-05 Ashworth William J Multi-diaphragm artificial reverberation device
US4823391A (en) * 1986-07-22 1989-04-18 Schwartz David M Sound reproduction system
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
WO2003024149A1 (en) * 2001-09-10 2003-03-20 Sonion A/S Miniature speaker with integrated signal processing electronics
CA2408045A1 (en) * 2001-10-16 2003-04-16 Audio Products International Corp. Loudspeaker with large displacement motional feedback
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
USD776086S1 (en) * 2014-04-23 2017-01-10 Martin Audio Limited Loudspeaker
EP3185582B1 (en) * 2014-12-02 2019-10-09 Sony Corporation Speaker device
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
NL294443A (pt) * 1963-06-21
JPS4120247Y1 (pt) * 1964-07-18 1966-09-26

Also Published As

Publication number Publication date
ATA476274A (de) 1976-02-15
AT332919B (de) 1976-10-25
CH569397A5 (pt) 1975-11-14
IT1011942B (it) 1977-02-10
SE395103B (sv) 1977-07-25
DK139450C (pt) 1979-07-30
CA1003554A (en) 1977-01-11
DE2426474B2 (de) 1977-06-02
SE7407496L (pt) 1974-12-13
BE816140A (fr) 1974-12-10
ZA743498B (en) 1976-01-28
FR2233784A1 (pt) 1975-01-10
DK139450B (da) 1979-02-19
JPS605678Y2 (ja) 1985-02-21
DE2426474A1 (de) 1975-01-09
AU6992374A (en) 1975-12-11
JPS5034223A (pt) 1975-04-02
DK307774A (pt) 1975-02-03
NL7308103A (pt) 1974-12-16
US3941932A (en) 1976-03-02
GB1471190A (en) 1977-04-21
JPS56105993U (pt) 1981-08-18
FR2233784B1 (pt) 1977-10-07
ES427139A1 (es) 1976-07-16

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