JPS551737A - Transducer - Google Patents

Transducer

Info

Publication number
JPS551737A
JPS551737A JP7443478A JP7443478A JPS551737A JP S551737 A JPS551737 A JP S551737A JP 7443478 A JP7443478 A JP 7443478A JP 7443478 A JP7443478 A JP 7443478A JP S551737 A JPS551737 A JP S551737A
Authority
JP
Japan
Prior art keywords
magnetic
base
layer
pole
substance layer
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.)
Granted
Application number
JP7443478A
Other languages
Japanese (ja)
Other versions
JPS6150439B2 (en
Inventor
Masaru Odagiri
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7443478A priority Critical patent/JPS551737A/en
Publication of JPS551737A publication Critical patent/JPS551737A/en
Publication of JPS6150439B2 publication Critical patent/JPS6150439B2/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
    • H04R11/00—Transducers of moving-armature or moving-core type

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

PURPOSE:To increase the coupling of electromagnetic-mechanical conversion and the energy conversion efficiency, by forming the vertical magnatizing ferro magnetic substance layer on the base such as marcomolecular mold, non-ferrous metal. inorganic substance and electret, and providing it close to the electromagnetic coil. CONSTITUTION:The ferromagnetic substance layer 2 is made of the material almost vertically magnetized to the surface of the magnetic layer against opposite magnetic field, the magnetic double layer in which one side if N pole and another is S pole is obtained, the alloy such as Gd-Co is formed on the base 1 with the method such as sputtering and vacuum evaporation. As the base 1, the film of polyester about 10 mu or less in thickness is used, and on it, the vertical magnetizing ferro magnetic substance layer 2 is formed as thin film 0.5 mu or less. Since this is very light in weight and has high magnetic flux density, when it is used for speakers, microphones and pick-up's, the impedance matching between mechanical and electrical performance can easily be taken, and excellent coupling and response, excellent sensitivity, linearity and dynamic range can be obtained totally.
JP7443478A 1978-06-19 1978-06-19 Transducer Granted JPS551737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7443478A JPS551737A (en) 1978-06-19 1978-06-19 Transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7443478A JPS551737A (en) 1978-06-19 1978-06-19 Transducer

Publications (2)

Publication Number Publication Date
JPS551737A true JPS551737A (en) 1980-01-08
JPS6150439B2 JPS6150439B2 (en) 1986-11-04

Family

ID=13547101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7443478A Granted JPS551737A (en) 1978-06-19 1978-06-19 Transducer

Country Status (1)

Country Link
JP (1) JPS551737A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1244332A2 (en) * 2001-01-24 2002-09-25 Knowles Electronics, LLC Silicon capacitive microphone
EP1881732A1 (en) * 2006-06-21 2008-01-23 Harman/Becker Automotive Systems GmbH Magnetic membrane suspension
US7940952B2 (en) 2005-01-26 2011-05-10 Harman Becker Automotive Systems Gmbh Electro-acoustic transducer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1244332A2 (en) * 2001-01-24 2002-09-25 Knowles Electronics, LLC Silicon capacitive microphone
EP1244332A3 (en) * 2001-01-24 2003-11-26 Knowles Electronics, LLC Silicon capacitive microphone
US6847090B2 (en) 2001-01-24 2005-01-25 Knowles Electronics, Llc Silicon capacitive microphone
US7940952B2 (en) 2005-01-26 2011-05-10 Harman Becker Automotive Systems Gmbh Electro-acoustic transducer
EP1881732A1 (en) * 2006-06-21 2008-01-23 Harman/Becker Automotive Systems GmbH Magnetic membrane suspension
US7940953B2 (en) 2006-06-21 2011-05-10 Harman Becker Automotive Systems Gmbh Magnetic membrane suspension

Also Published As

Publication number Publication date
JPS6150439B2 (en) 1986-11-04

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