AU3194199A - Shorting rings in dual-coil dual-gap loudspeaker drivers - Google Patents
Shorting rings in dual-coil dual-gap loudspeaker driversInfo
- Publication number
- AU3194199A AU3194199A AU31941/99A AU3194199A AU3194199A AU 3194199 A AU3194199 A AU 3194199A AU 31941/99 A AU31941/99 A AU 31941/99A AU 3194199 A AU3194199 A AU 3194199A AU 3194199 A AU3194199 A AU 3194199A
- Authority
- AU
- Australia
- Prior art keywords
- dual
- coil
- rings
- shorting rings
- voice
- 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.)
- Abandoned
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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Circuit For Audible Band Transducer (AREA)
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.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7862398P | 1998-03-19 | 1998-03-19 | |
US60078623 | 1998-03-19 | ||
PCT/US1999/006084 WO1999048329A1 (en) | 1998-03-19 | 1999-03-19 | Shorting rings in dual-coil dual-gap loudspeaker drivers |
Publications (1)
Publication Number | Publication Date |
---|---|
AU3194199A true AU3194199A (en) | 1999-10-11 |
Family
ID=22145231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU31941/99A Abandoned AU3194199A (en) | 1998-03-19 | 1999-03-19 | Shorting rings in dual-coil dual-gap loudspeaker drivers |
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)
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 |
EP1641315B1 (en) * | 2003-06-18 | 2012-11-14 | Yu Yao Temperature Instrument Factory Co., Ltd. | 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 |
US9100738B2 (en) | 2013-08-01 | 2015-08-04 | 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 |
US11070920B2 (en) * | 2019-09-27 | 2021-07-20 | Apple Inc. | Dual function transducer |
US11785392B2 (en) | 2019-09-27 | 2023-10-10 | 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)
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 |
CA2218471C (en) * | 1995-04-18 | 2000-05-02 | Douglas J. Button | Dual coil drive with multipurpose housing |
-
1999
- 1999-03-19 WO PCT/US1999/006084 patent/WO1999048329A1/en active Application Filing
- 1999-03-19 DE DE69939898T patent/DE69939898D1/en not_active Expired - Lifetime
- 1999-03-19 JP JP2000537404A patent/JP3574403B2/en not_active Expired - Lifetime
- 1999-03-19 CA CA002324394A patent/CA2324394C/en not_active Expired - Lifetime
- 1999-03-19 EP EP99913989A patent/EP1072168B1/en not_active Expired - Lifetime
- 1999-03-19 AT AT99913989T patent/ATE414395T1/en not_active IP Right Cessation
- 1999-03-19 AU AU31941/99A patent/AU3194199A/en not_active Abandoned
- 1999-03-19 CN CNB998054852A patent/CN1152601C/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CN1152601C (en) | 2004-06-02 |
ATE414395T1 (en) | 2008-11-15 |
EP1072168A4 (en) | 2006-02-08 |
EP1072168A1 (en) | 2001-01-31 |
CA2324394A1 (en) | 1999-09-23 |
EP1072168B1 (en) | 2008-11-12 |
JP3574403B2 (en) | 2004-10-06 |
CA2324394C (en) | 2006-02-07 |
WO1999048329A1 (en) | 1999-09-23 |
JP2002507873A (en) | 2002-03-12 |
CN1298622A (en) | 2001-06-06 |
DE69939898D1 (en) | 2008-12-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK6 | Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase |