JPS633515B2 - - Google Patents

Info

Publication number
JPS633515B2
JPS633515B2 JP55169188A JP16918880A JPS633515B2 JP S633515 B2 JPS633515 B2 JP S633515B2 JP 55169188 A JP55169188 A JP 55169188A JP 16918880 A JP16918880 A JP 16918880A JP S633515 B2 JPS633515 B2 JP S633515B2
Authority
JP
Japan
Prior art keywords
voice coil
magnetic fluid
holes
transducer
region
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.)
Expired
Application number
JP55169188A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5691598A (en
Inventor
Torauerunihitsuto Heruberuto
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.)
TEREFUNKEN FUERUNZEE UNTO RUNTOFUNKU GmbH
Original Assignee
TEREFUNKEN FUERUNZEE UNTO RUNTOFUNKU 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 TEREFUNKEN FUERUNZEE UNTO RUNTOFUNKU GmbH filed Critical TEREFUNKEN FUERUNZEE UNTO RUNTOFUNKU GmbH
Publication of JPS5691598A publication Critical patent/JPS5691598A/ja
Publication of JPS633515B2 publication Critical patent/JPS633515B2/ja
Granted 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)
JP16918880A 1979-12-06 1980-12-02 Dynamic converter with voice coll in air gap filled with magnetic fluid Granted JPS5691598A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2949115A DE2949115C3 (de) 1979-12-06 1979-12-06 Dynamischer Wandler mit einer Schwingspule in einem mit einer magnetischen Flüssigkeit gefüllten Luftspalt und Verfahren zum Einfüllen und/oder gleichmäßigen Verteilen dieser Flüssigkeit

Publications (2)

Publication Number Publication Date
JPS5691598A JPS5691598A (en) 1981-07-24
JPS633515B2 true JPS633515B2 (en]) 1988-01-25

Family

ID=6087766

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16918880A Granted JPS5691598A (en) 1979-12-06 1980-12-02 Dynamic converter with voice coll in air gap filled with magnetic fluid

Country Status (3)

Country Link
US (1) US4414437A (en])
JP (1) JPS5691598A (en])
DE (1) DE2949115C3 (en])

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5151943A (en) * 1990-11-13 1992-09-29 Mcintosh Laboratory, Inc. Low distortion dynamic loudspeaker
JPH05164181A (ja) * 1991-12-06 1993-06-29 Tokai Rubber Ind Ltd 流体封入式防振装置
DE19610997B4 (de) * 1996-03-21 2006-07-13 Sennheiser Electronic Gmbh & Co. Kg Elektrodynamischer Schallwandler mit Magnetspaltenabdichtung und Hörhilfe
US6041131A (en) * 1997-07-09 2000-03-21 Knowles Electronics, Inc. Shock resistant electroacoustic transducer
US20020094103A1 (en) * 2000-10-30 2002-07-18 Babb Burton A. Acoustic loudspeaker
KR100452935B1 (ko) * 2001-02-13 2004-10-14 마쯔시다덴기산교 가부시키가이샤 스피커
SE523125C2 (sv) * 2001-06-21 2004-03-30 P & B Res Ab Vibrator för vibrationsalstring i benförankrade hörapparater
US6868167B2 (en) * 2002-04-11 2005-03-15 Ferrotec Corporation Audio speaker and method for assembling an audio speaker
US6804368B2 (en) * 2002-04-11 2004-10-12 Ferrotec Corporation Micro-speaker and method for assembling a micro-speaker
JP2006005852A (ja) * 2004-06-21 2006-01-05 Pioneer Electronic Corp スピーカー装置
JP4403979B2 (ja) 2005-01-31 2010-01-27 パナソニック株式会社 スピーカ
JP2006217452A (ja) * 2005-02-07 2006-08-17 Matsushita Electric Ind Co Ltd スピーカ
US7729504B2 (en) * 2006-02-14 2010-06-01 Ferrotec Corporation Ferrofluid centered voice coil speaker
JP6574933B2 (ja) 2011-11-28 2019-09-18 ブルカー ナノ インコーポレイテッドＢｒｕｋｅｒ Ｎａｎｏ，Ｉｎｃ． 高温加熱システム
WO2013187972A1 (en) 2012-06-13 2013-12-19 Schmitz Roger William Environmental conditioning assembly for use in mechanical testing at micron or nano-scales
JP6206730B2 (ja) * 2012-06-20 2017-10-04 パナソニックＩｐマネジメント株式会社 スピーカおよびそれを備える機器
US10573285B1 (en) 2017-01-30 2020-02-25 Mark J. BONNER Portable electronic musical system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE368021A (en]) * 1929-03-02
US3792394A (en) * 1971-12-16 1974-02-12 J Bertagni Voice coil
US4017694A (en) * 1976-02-18 1977-04-12 Essex Group, Inc. Method for making loudspeaker with magnetic fluid enveloping the voice coil
DE2740661C3 (de) * 1977-09-09 1980-06-12 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Dynamischer Wandler mit einer Schwingspule in einem mit einer magnetischen Flüssigkeit gefüllten Luftspalt
DE2900427B1 (de) * 1979-01-08 1979-08-02 Licentia Gmbh Dynamischer Wandler mit einer Schwingspule in einem mit einer magnetischen Fluessigkeit gefuellten Luftspalt

Also Published As

Publication number Publication date
DE2949115B2 (de) 1981-09-03
JPS5691598A (en) 1981-07-24
DE2949115C3 (de) 1982-04-22
US4414437A (en) 1983-11-08
DE2949115A1 (de) 1981-06-11

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