JPS5451817A - Speaker - Google Patents

Speaker

Info

Publication number
JPS5451817A
JPS5451817A JP11800577A JP11800577A JPS5451817A JP S5451817 A JPS5451817 A JP S5451817A JP 11800577 A JP11800577 A JP 11800577A JP 11800577 A JP11800577 A JP 11800577A JP S5451817 A JPS5451817 A JP S5451817A
Authority
JP
Japan
Prior art keywords
port
center pole
flange part
low frequency
reproduction range
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
JP11800577A
Other languages
Japanese (ja)
Inventor
Masao Fujihira
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP11800577A priority Critical patent/JPS5451817A/en
Publication of JPS5451817A publication Critical patent/JPS5451817A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

PURPOSE:To achieve the expansion and fortification of low frequency reproduction range by forming a center pole port with a cylindrical center pole and a flange part and providing a sub-port on the extension end thereof. CONSTITUTION:A blade 16 formed in annular form is fixed to the top end part of a permanent magnet 15 which is formed in annular form and a yoke 17 is constituted by a cylindrical center pole 17a and a flange part 17b. The hollow part thereof becomes a center pole port 18 for expanding of low frequency reproduction range. A permanent magnet 15 is fixed to one side face of the flange part 17b and the magnetic circuit of the arrow A is formed. It turns out that the magnetic flux of a specified magnetic flux density always transmits in the gap 19 formed between the outside circumference of the pole port 18 and the inside circumference of the plate 16. On the other hand, the sub-port 21 constituted by the inside cylinder part 21a and flange part 21b is mounted to the other side face of the flange 17b. The low frequency reproduction range of the speaker may be expanded with the simple construction.
JP11800577A 1977-09-30 1977-09-30 Speaker Pending JPS5451817A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11800577A JPS5451817A (en) 1977-09-30 1977-09-30 Speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11800577A JPS5451817A (en) 1977-09-30 1977-09-30 Speaker

Publications (1)

Publication Number Publication Date
JPS5451817A true JPS5451817A (en) 1979-04-24

Family

ID=14725685

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11800577A Pending JPS5451817A (en) 1977-09-30 1977-09-30 Speaker

Country Status (1)

Country Link
JP (1) JPS5451817A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56125189A (en) * 1980-03-07 1981-10-01 Matsushita Electric Ind Co Ltd Speaker system
JPS63149689U (en) * 1987-03-20 1988-10-03
EP0448110A2 (en) * 1990-03-23 1991-09-25 Sharp Kabushiki Kaisha Headphone apparatus
JP2011504053A (en) * 2007-11-14 2011-01-27 ハーマン インターナショナル インダストリーズ インコーポレイテッド Multiple magnet speaker

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56125189A (en) * 1980-03-07 1981-10-01 Matsushita Electric Ind Co Ltd Speaker system
JPS63149689U (en) * 1987-03-20 1988-10-03
EP0448110A2 (en) * 1990-03-23 1991-09-25 Sharp Kabushiki Kaisha Headphone apparatus
JP2011504053A (en) * 2007-11-14 2011-01-27 ハーマン インターナショナル インダストリーズ インコーポレイテッド Multiple magnet speaker

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