JPS54155822A - Speaker - Google Patents

Speaker

Info

Publication number
JPS54155822A
JPS54155822A JP6472778A JP6472778A JPS54155822A JP S54155822 A JPS54155822 A JP S54155822A JP 6472778 A JP6472778 A JP 6472778A JP 6472778 A JP6472778 A JP 6472778A JP S54155822 A JPS54155822 A JP S54155822A
Authority
JP
Japan
Prior art keywords
center pole
voice coil
crystal grains
ring
plate
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.)
Pending
Application number
JP6472778A
Other languages
Japanese (ja)
Inventor
Hideo Ikeda
Eiji Tsuchiya
Susumu Okada
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP6472778A priority Critical patent/JPS54155822A/en
Priority to US06/037,893 priority patent/US4289937A/en
Priority to DE2922076A priority patent/DE2922076C2/en
Priority to GB7918874A priority patent/GB2022362B/en
Publication of JPS54155822A publication Critical patent/JPS54155822A/en
Pending 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)

Abstract

PURPOSE:To reduce sound pressure distortion by using ferromagnetic material composed of fine ferrite crystal grains for the portion of the center pole or plate of a speaker opposing to a voice coil. CONSTITUTION:In the speaker constituting by disposing a center pole 2 at the center of a disc form yoke 1 and a ring form magnet 3 on the periphery and disposing a voice coil 6 in the cavity 5 formed between the ring-form plate 4 fixed and disposed on the magnet 3 and the center pole 2, the ring-form ferromagnetic materials 8, 9 composed of fine ferrite crystal grains are provided on the portions of the center pole 2 and plate 4 opposing to the voice coil 6. For example, the hot-rolled 50% Ni-Fe alloy which has been finished to a required size and has undergone unstressing annealing after having undergone bending and drawing to have finer ferrite crystal grains is used as the abovementioned ferromagnetic material.
JP6472778A 1978-05-30 1978-05-30 Speaker Pending JPS54155822A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP6472778A JPS54155822A (en) 1978-05-30 1978-05-30 Speaker
US06/037,893 US4289937A (en) 1978-05-30 1979-05-10 Speaker with fine grain ferromagnetic material on center pole or ring
DE2922076A DE2922076C2 (en) 1978-05-30 1979-05-30 Loudspeaker with a sound coil in an annular air gap
GB7918874A GB2022362B (en) 1978-05-30 1979-05-30 Speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6472778A JPS54155822A (en) 1978-05-30 1978-05-30 Speaker

Publications (1)

Publication Number Publication Date
JPS54155822A true JPS54155822A (en) 1979-12-08

Family

ID=13266463

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6472778A Pending JPS54155822A (en) 1978-05-30 1978-05-30 Speaker

Country Status (1)

Country Link
JP (1) JPS54155822A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5899994U (en) * 1981-12-25 1983-07-07 ヤマハ株式会社 Magnetic circuit in electroacoustic transducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5899994U (en) * 1981-12-25 1983-07-07 ヤマハ株式会社 Magnetic circuit in electroacoustic transducer

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