JPS5451519A - Dynamic electric sound transducer that has vibrating coil in void* in which magnetic liquid is filled - Google Patents

Dynamic electric sound transducer that has vibrating coil in void* in which magnetic liquid is filled

Info

Publication number
JPS5451519A
JPS5451519A JP10904978A JP10904978A JPS5451519A JP S5451519 A JPS5451519 A JP S5451519A JP 10904978 A JP10904978 A JP 10904978A JP 10904978 A JP10904978 A JP 10904978A JP S5451519 A JPS5451519 A JP S5451519A
Authority
JP
Japan
Prior art keywords
void
filled
sound transducer
magnetic liquid
dynamic electric
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.)
Pending
Application number
JP10904978A
Other languages
English (en)
Japanese (ja)
Inventor
Haintsu Teiire Kaaru
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of JPS5451519A publication Critical patent/JPS5451519A/ja
Pending 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
JP10904978A 1977-09-09 1978-09-05 Dynamic electric sound transducer that has vibrating coil in void* in which magnetic liquid is filled Pending JPS5451519A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2740661A DE2740661C3 (de) 1977-09-09 1977-09-09 Dynamischer Wandler mit einer Schwingspule in einem mit einer magnetischen Flüssigkeit gefüllten Luftspalt

Publications (1)

Publication Number Publication Date
JPS5451519A true JPS5451519A (en) 1979-04-23

Family

ID=6018534

Family Applications (2)

Application Number Title Priority Date Filing Date
JP10904978A Pending JPS5451519A (en) 1977-09-09 1978-09-05 Dynamic electric sound transducer that has vibrating coil in void* in which magnetic liquid is filled
JP1987051680U Expired JPH024559Y2 (en]) 1977-09-09 1987-04-07

Family Applications After (1)

Application Number Title Priority Date Filing Date
JP1987051680U Expired JPH024559Y2 (en]) 1977-09-09 1987-04-07

Country Status (4)

Country Link
US (1) US4303806A (en])
JP (2) JPS5451519A (en])
DE (1) DE2740661C3 (en])
GB (1) GB2004161B (en])

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2062408B (en) * 1979-10-02 1984-02-22 Victor Company Of Japan Speaker
DE2949115C3 (de) * 1979-12-06 1982-04-22 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Dynamischer Wandler mit einer Schwingspule in einem mit einer magnetischen Flüssigkeit gefüllten Luftspalt und Verfahren zum Einfüllen und/oder gleichmäßigen Verteilen dieser Flüssigkeit
DE3028065A1 (de) * 1980-07-24 1982-02-18 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Dynamischer wandler mit mitteln zur verringerung des streufeldes fuer fernsehgeraete
JPS57136897A (en) * 1981-02-18 1982-08-24 Ibuki Kogyo Kk Horn speaker
GB2125652A (en) * 1982-06-01 1984-03-07 Harman Int Ind Loudspeaker voice coil
US4914750A (en) * 1987-07-13 1990-04-03 Avm Hess, Inc. Sound transducer
JP3979509B2 (ja) * 1998-12-04 2007-09-19 パイオニア株式会社 スピ―カ―装置
US6751060B2 (en) 2000-12-05 2004-06-15 Imation Corp. Magnetic media with readable topographical features
US6628598B2 (en) 2000-12-05 2003-09-30 Imation Corp. Patterned media system
US6804368B2 (en) * 2002-04-11 2004-10-12 Ferrotec Corporation Micro-speaker and method for assembling a micro-speaker
US6868167B2 (en) * 2002-04-11 2005-03-15 Ferrotec Corporation Audio speaker and method for assembling an audio speaker
US20040008858A1 (en) * 2002-05-02 2004-01-15 Steere John F. Acoustically enhanced electro-dynamic loudspeakers
US20070053545A1 (en) * 2005-09-07 2007-03-08 Steff Lin Speaker
EP1950998B1 (en) * 2007-01-29 2014-03-26 Sony Corporation Speaker unit and speaker apparatus
MX351734B (es) 2013-08-26 2017-10-26 Halliburton Energy Services Inc Transductores de reluctancia variable.
JP6399390B2 (ja) * 2013-12-27 2018-10-03 パナソニックＩｐマネジメント株式会社 スピーカおよびａｖ機器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1971452A (en) * 1931-03-16 1934-08-28 Siemens Ag Diaphragm for electrodynamic loud speakers
JPS50112019A (en]) * 1974-02-12 1975-09-03
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
GB2004161A (en) 1979-03-21
JPS6312990U (en]) 1988-01-28
DE2740661A1 (de) 1979-04-05
DE2740661B2 (de) 1979-09-20
DE2740661C3 (de) 1980-06-12
GB2004161B (en) 1982-07-28
US4303806A (en) 1981-12-01
JPH024559Y2 (en]) 1990-02-02

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