ATE414395T1 - SHORT CIRCUIT RINGS FOR SPEAKER DRIVE WITH DOUBLE COILS AND DOUBLE COLUMNS - Google Patents

SHORT CIRCUIT RINGS FOR SPEAKER DRIVE WITH DOUBLE COILS AND DOUBLE COLUMNS

Info

Publication number
ATE414395T1
ATE414395T1 AT99913989T AT99913989T ATE414395T1 AT E414395 T1 ATE414395 T1 AT E414395T1 AT 99913989 T AT99913989 T AT 99913989T AT 99913989 T AT99913989 T AT 99913989T AT E414395 T1 ATE414395 T1 AT E414395T1
Authority
AT
Austria
Prior art keywords
double
rings
voice
coils
short circuit
Prior art date
Application number
AT99913989T
Other languages
German (de)
Inventor
Douglas Button
Ralph Hyde
Alex Salvatti
Original Assignee
Jbl Inc
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 Jbl Inc filed Critical Jbl Inc
Application granted granted Critical
Publication of ATE414395T1 publication Critical patent/ATE414395T1/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/022—Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/041—Voice coil arrangements comprising more than one voice coil unit on the same bobbin

Abstract

Loudspeakers and other transducers of the dual-voice-coil/dual-magnetic-gap type can be improved by the addition of one or more annular shorting rings (16A-16S) strategically located in the vicinity of the two magnetic gaps. The shorting rings have no effect on a steady state magnetic field but act in opposition to any change in flux density or any displacement of the flux lines such as those that occur under the loading imposed when the voice coils (10A, 10B) are driven hard with audio frequency current. Thus a plurality of rings can be strategically deployed at different locations so as to optimally suppress both even and odd order harmonic distortion and to reduce the voice coil inductance.
AT99913989T 1998-03-19 1999-03-19 SHORT CIRCUIT RINGS FOR SPEAKER DRIVE WITH DOUBLE COILS AND DOUBLE COLUMNS ATE414395T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7862398P 1998-03-19 1998-03-19

Publications (1)

Publication Number Publication Date
ATE414395T1 true ATE414395T1 (en) 2008-11-15

Family

ID=22145231

Family Applications (1)

Application Number Title Priority Date Filing Date
AT99913989T ATE414395T1 (en) 1998-03-19 1999-03-19 SHORT CIRCUIT RINGS FOR SPEAKER DRIVE WITH DOUBLE COILS AND DOUBLE COLUMNS

Country Status (8)

Country Link
EP (1) EP1072168B1 (en)
JP (1) JP3574403B2 (en)
CN (1) CN1152601C (en)
AT (1) ATE414395T1 (en)
AU (1) AU3194199A (en)
CA (1) CA2324394C (en)
DE (1) DE69939898D1 (en)
WO (1) WO1999048329A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6774510B1 (en) 2000-10-25 2004-08-10 Harman International Industries, Inc. Electromagnetic motor with flux stabilization ring, saturation tips, and radiator
WO2004112429A1 (en) * 2003-06-18 2004-12-23 Qijun Wu A low-inductance electromagnetic drive without driving the magnetic flux circuit
CN101202161B (en) * 2007-10-24 2012-12-26 钱维忠 Open/close current transformer
CN102149036A (en) * 2010-02-09 2011-08-10 美律实业股份有限公司 Speaker with double voice coils
FR2971385B1 (en) * 2011-02-08 2014-02-14 Renault Sa MAGNETIC MOTOR DEVICE OF ELECTRODYNAMIC TRANSDUCER
EP2833648B1 (en) * 2013-08-01 2016-04-27 Harman International Industries, Inc. Electrodynamic loudspeaker with conducting elements
CN107820174B (en) * 2017-11-22 2020-03-17 重庆长安汽车股份有限公司 Vehicle-mounted loudspeaker magnetic circuit structure
US11785392B2 (en) 2019-09-27 2023-10-10 Apple Inc. Dual function transducer
US11070920B2 (en) * 2019-09-27 2021-07-20 Apple Inc. Dual function transducer
CN116980800A (en) * 2023-09-25 2023-10-31 苏州墨觉智能电子有限公司 Magnetic circuit assembly, bone conduction sounding device and bone conduction earphone

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3632904A (en) * 1970-03-24 1972-01-04 Paul Mauz Moving coil loudspeaker with eddy current suppression
US3783311A (en) * 1970-12-19 1974-01-01 Coral Audio Corp Magnetic device for use in acoustic apparatus
JPS542647Y2 (en) * 1971-03-10 1979-02-05
JPS5235294B2 (en) * 1971-12-17 1977-09-08
JP2501948Y2 (en) * 1985-09-02 1996-06-19 パイオニア株式会社 In-vehicle audio system
WO1991005447A1 (en) * 1989-10-02 1991-04-18 Jbl, Incorporated Improved electrodynamic loudspeaker
US5381483A (en) * 1993-04-05 1995-01-10 Commonwealth Of Puerto Rico Minimal inductance electrodynamic transducer
DK54093D0 (en) * 1993-05-10 1993-05-10 Scan Speak As SPEAKER
DE69535513T2 (en) * 1995-04-18 2007-10-04 Harman International Industries, Incorporated, Northridge COIL PAIR DRIVE WITH MULTIPURPOSE HOUSING

Also Published As

Publication number Publication date
WO1999048329A1 (en) 1999-09-23
JP2002507873A (en) 2002-03-12
AU3194199A (en) 1999-10-11
EP1072168B1 (en) 2008-11-12
CN1298622A (en) 2001-06-06
DE69939898D1 (en) 2008-12-24
CA2324394A1 (en) 1999-09-23
CA2324394C (en) 2006-02-07
JP3574403B2 (en) 2004-10-06
EP1072168A4 (en) 2006-02-08
CN1152601C (en) 2004-06-02
EP1072168A1 (en) 2001-01-31

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Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties