DE69321146D1 - LEVEL ELECTROMAGNETIC CONVERTER - Google Patents

LEVEL ELECTROMAGNETIC CONVERTER

Info

Publication number
DE69321146D1
DE69321146D1 DE69321146T DE69321146T DE69321146D1 DE 69321146 D1 DE69321146 D1 DE 69321146D1 DE 69321146 T DE69321146 T DE 69321146T DE 69321146 T DE69321146 T DE 69321146T DE 69321146 D1 DE69321146 D1 DE 69321146D1
Authority
DE
Germany
Prior art keywords
electromagnetic converter
level electromagnetic
level
converter
electromagnetic
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 - Fee Related
Application number
DE69321146T
Other languages
German (de)
Other versions
DE69321146T2 (en
Inventor
Charles Stevenson
Edward Porrazzo
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.)
Chain Reactions Inc
Original Assignee
Chain Reactions 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 Chain Reactions Inc filed Critical Chain Reactions Inc
Publication of DE69321146D1 publication Critical patent/DE69321146D1/en
Application granted granted Critical
Publication of DE69321146T2 publication Critical patent/DE69321146T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Surgical Instruments (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
DE69321146T 1993-04-29 1993-04-29 LEVEL ELECTROMAGNETIC CONVERTER Expired - Fee Related DE69321146T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1993/004012 WO1994026076A1 (en) 1993-04-29 1993-04-29 Planar electromagnetic transducer

Publications (2)

Publication Number Publication Date
DE69321146D1 true DE69321146D1 (en) 1998-10-22
DE69321146T2 DE69321146T2 (en) 1999-05-06

Family

ID=22236547

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69321146T Expired - Fee Related DE69321146T2 (en) 1993-04-29 1993-04-29 LEVEL ELECTROMAGNETIC CONVERTER

Country Status (7)

Country Link
EP (1) EP0707782B1 (en)
JP (1) JPH08509853A (en)
KR (1) KR100310520B1 (en)
AU (1) AU4222293A (en)
DE (1) DE69321146T2 (en)
ES (1) ES2123647T3 (en)
WO (1) WO1994026076A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4841643B2 (en) * 2009-04-15 2011-12-21 三菱電機エンジニアリング株式会社 Electromagnetic transducer

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631450A (en) * 1969-08-27 1971-12-28 John W Chalfant Acoustic alarm device
DE2851745C2 (en) * 1978-11-30 1985-01-10 Elektrotechnik Ehmann Gmbh, 6953 Gundelsheim Multi-layer membrane for an electroacoustic transducer
FR2477821A1 (en) * 1980-03-06 1981-09-11 3A Art Acoustique Appliquee Sa ELECTRODYNAMIC SPEAKER
US4384173A (en) * 1980-08-01 1983-05-17 Granus Corporation Electromagnetic planar diaphragm transducer
US4463825A (en) * 1981-07-03 1984-08-07 James M. Bird Method and apparatus for generation of acoustic energy
US4894742A (en) * 1985-10-07 1990-01-16 Nippon Mining Company, Limited Thin-film laminated magnetic heads of Fe-Si-Al alloy
CA1277415C (en) * 1986-04-11 1990-12-04 Lorne A. Whitehead Elastomer membrane enhanced electrostatic transducer
US4837838A (en) * 1987-03-30 1989-06-06 Eminent Technology, Inc. Electromagnetic transducer of improved efficiency
US5003609A (en) * 1988-02-15 1991-03-26 Foster Electric Co., Ltd. Whole-surface driven speaker
US4939784A (en) * 1988-09-19 1990-07-03 Bruney Paul F Loudspeaker structure
US5283836A (en) * 1989-09-22 1994-02-01 Trufitt Anthony L Planar speakers

Also Published As

Publication number Publication date
KR100310520B1 (en) 2001-12-17
ES2123647T3 (en) 1999-01-16
WO1994026076A1 (en) 1994-11-10
AU4222293A (en) 1994-11-21
EP0707782A4 (en) 1996-01-23
EP0707782B1 (en) 1998-09-16
JPH08509853A (en) 1996-10-15
EP0707782A1 (en) 1996-04-24
DE69321146T2 (en) 1999-05-06

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee