SE7803728L - DYNAMIC ELECTRIC ACOUSTIC CONVERTER - Google Patents

DYNAMIC ELECTRIC ACOUSTIC CONVERTER

Info

Publication number
SE7803728L
SE7803728L SE7803728A SE7803728A SE7803728L SE 7803728 L SE7803728 L SE 7803728L SE 7803728 A SE7803728 A SE 7803728A SE 7803728 A SE7803728 A SE 7803728A SE 7803728 L SE7803728 L SE 7803728L
Authority
SE
Sweden
Prior art keywords
dynamic electric
acoustic converter
electric acoustic
converter
dynamic
Prior art date
Application number
SE7803728A
Other languages
Swedish (sv)
Other versions
SE421099B (en
Inventor
K-H Thiele
Original Assignee
Licentia Gmbh
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 Licentia Gmbh filed Critical Licentia Gmbh
Publication of SE7803728L publication Critical patent/SE7803728L/en
Publication of SE421099B publication Critical patent/SE421099B/en

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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H04R9/027—Air gaps using a magnetic fluid
SE7803728A 1977-04-09 1978-04-03 DYNAMIC ELECTROACUSTIC CONVERTER SE421099B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2716063A DE2716063B2 (en) 1977-04-09 1977-04-09 Dynamic transducer with a voice coil in an air gap filled with a magnetic fluid

Publications (2)

Publication Number Publication Date
SE7803728L true SE7803728L (en) 1978-10-10
SE421099B SE421099B (en) 1981-11-23

Family

ID=6006096

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7803728A SE421099B (en) 1977-04-09 1978-04-03 DYNAMIC ELECTROACUSTIC CONVERTER

Country Status (6)

Country Link
JP (1) JPS53146614A (en)
DE (1) DE2716063B2 (en)
FR (1) FR2386954A1 (en)
GB (1) GB1599506A (en)
IT (1) IT1095115B (en)
SE (1) SE421099B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5549097A (en) * 1978-10-05 1980-04-08 Pioneer Electronic Corp Speaker unit
DE2900427B1 (en) * 1979-01-08 1979-08-02 Licentia Gmbh Dynamic transducer with a voice coil in an air gap filled with a magnetic fluid
DE3028065A1 (en) * 1980-07-24 1982-02-18 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Dynamic converter for TV loudspeaker - has stray field reduction using magnet air gap filled with magnetic fluid
JPH0450718Y2 (en) * 1986-02-28 1992-11-30
WO1998038834A1 (en) * 1997-02-28 1998-09-03 Koninklijke Philips Electronics N.V. Electroacoustic transducer comprising a closing member for closing the rear volume of the transducer
US6804368B2 (en) * 2002-04-11 2004-10-12 Ferrotec Corporation Micro-speaker and method for assembling a micro-speaker
FR2892887B1 (en) * 2005-11-03 2007-12-21 Bernard Richoux ELECTRO-DYNAMIC TRANSDUCER WITH FERROFLUID SUSPENSION DOME
FR2919978B1 (en) * 2007-08-09 2011-04-29 Gilles Milot ELECTRODYNAMIC TRANSDUCER, IN PARTICULAR OF THE SPEAKER TYPE, WITH FERROFLUID SUSPENSION AND ASSOCIATED DEVICES
US9576713B2 (en) 2013-08-26 2017-02-21 Halliburton Energy Services, Inc. Variable reluctance transducers
CN109561368B (en) * 2017-09-26 2023-08-11 惠州迪芬尼声学科技股份有限公司 Hard ball top high pitch loudspeaker

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581015A (en) * 1966-12-28 1971-05-25 Aiwa Co Dynamic microphone
US4017694A (en) * 1976-02-18 1977-04-12 Essex Group, Inc. Method for making loudspeaker with magnetic fluid enveloping the voice coil

Also Published As

Publication number Publication date
FR2386954A1 (en) 1978-11-03
DE2716063A1 (en) 1978-10-12
DE2716063B2 (en) 1979-04-19
IT7822093A0 (en) 1978-04-07
SE421099B (en) 1981-11-23
FR2386954B1 (en) 1984-07-27
JPS53146614A (en) 1978-12-20
GB1599506A (en) 1981-10-07
IT1095115B (en) 1985-08-10

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