CA982687A - Electro-acoustic transducer - Google Patents

Electro-acoustic transducer

Info

Publication number
CA982687A
CA982687A CA136,421A CA136421A CA982687A CA 982687 A CA982687 A CA 982687A CA 136421 A CA136421 A CA 136421A CA 982687 A CA982687 A CA 982687A
Authority
CA
Canada
Prior art keywords
electro
acoustic transducer
acoustic
transducer
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
CA136,421A
Other versions
CA136421S (en
Inventor
Sinichiro Kawamura
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Application granted granted Critical
Publication of CA982687A publication Critical patent/CA982687A/en
Expired 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
CA136,421A 1971-03-10 1972-03-07 Electro-acoustic transducer Expired CA982687A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971015019U JPS542647Y2 (en) 1971-03-10 1971-03-10

Publications (1)

Publication Number Publication Date
CA982687A true CA982687A (en) 1976-01-27

Family

ID=27863963

Family Applications (1)

Application Number Title Priority Date Filing Date
CA136,421A Expired CA982687A (en) 1971-03-10 1972-03-07 Electro-acoustic transducer

Country Status (3)

Country Link
US (1) US3881074A (en)
JP (1) JPS542647Y2 (en)
CA (1) CA982687A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295011A (en) * 1979-09-11 1981-10-13 Epicure Products Inc. Linear excursion-constant inductance loudspeaker
US4421956A (en) * 1981-09-29 1983-12-20 Peavey Electronics Corp. Loud speaker with minimized magnetic leakage
DE3267630D1 (en) * 1981-12-24 1986-01-02 Eckehard Kort Magnetic system with annular air-gap, in particular for woofers
ATE51994T1 (en) * 1985-07-17 1990-04-15 Studer Willi Ag MAGNETIC SYSTEM FOR A DYNAMIC LOUDSPEAKER.
DE69329918T2 (en) * 1992-11-18 2001-05-31 Matsushita Electric Industrial Co., Ltd. Television receiver
US5381483A (en) * 1993-04-05 1995-01-10 Commonwealth Of Puerto Rico Minimal inductance electrodynamic transducer
WO1996033592A1 (en) * 1995-04-18 1996-10-24 Harman International Industries, Inc. Dual coil drive with multipurpose housing
ATE414395T1 (en) * 1998-03-19 2008-11-15 Jbl Inc SHORT CIRCUIT RINGS FOR SPEAKER DRIVE WITH DOUBLE COILS AND DOUBLE COLUMNS
US6768806B1 (en) 1998-03-19 2004-07-27 Harman International Industries, Incorporated Shorting rings in dual-coil dual-gap loudspeaker drivers
FR2799919B1 (en) * 1999-10-19 2002-10-11 Sagem PERMANENT MAGNET ACTUATOR AND DRIVE ELECTRICAL COIL, ESPECIALLY MOBILE PHONE SPEAKER
US6774510B1 (en) * 2000-10-25 2004-08-10 Harman International Industries, Inc. Electromagnetic motor with flux stabilization ring, saturation tips, and radiator
JP3752674B2 (en) * 2002-08-28 2006-03-08 ミネベア株式会社 Magnetic circuit for speakers
US10280348B2 (en) 2017-01-31 2019-05-07 Prc-Desoto International, Inc. Low density aerospace compositions and sealants
CN208821073U (en) * 2018-10-15 2019-05-03 苏州上声电子股份有限公司 A kind of magnetic circuit of loudspeaker and loudspeaker
CN113557752B (en) * 2019-02-28 2023-06-23 普立菲有限公司 Speaker motor with improved linearity

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1953542A (en) * 1929-08-06 1934-04-03 Magnavox Co Sound reproducing device
US3079472A (en) * 1960-10-06 1963-02-26 Rca Corp Magnetic field structure for transducers and method of constructing same
US3413579A (en) * 1966-03-14 1968-11-26 Westinghouse Electric Corp Magnetic field assembly for electro-mechanical transducers

Also Published As

Publication number Publication date
US3881074A (en) 1975-04-29
JPS4712923U (en) 1972-10-16
JPS542647Y2 (en) 1979-02-05

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