FR2370401A1 - Low frequency loudspeaker armature - uses ferrite blocks as fixed component defining air gap for moving coil - Google Patents

Low frequency loudspeaker armature - uses ferrite blocks as fixed component defining air gap for moving coil

Info

Publication number
FR2370401A1
FR2370401A1 FR7633407A FR7633407A FR2370401A1 FR 2370401 A1 FR2370401 A1 FR 2370401A1 FR 7633407 A FR7633407 A FR 7633407A FR 7633407 A FR7633407 A FR 7633407A FR 2370401 A1 FR2370401 A1 FR 2370401A1
Authority
FR
France
Prior art keywords
armature
low frequency
air gap
fixed component
moving coil
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
FR7633407A
Other languages
French (fr)
Other versions
FR2370401B3 (en
Inventor
Bernard Bertuol
Alain Soubie
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.)
PARIS ECOLE NALE SUP ARTS METI
Original Assignee
PARIS ECOLE NALE SUP ARTS METI
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 PARIS ECOLE NALE SUP ARTS METI filed Critical PARIS ECOLE NALE SUP ARTS METI
Priority to FR7633407A priority Critical patent/FR2370401A1/en
Publication of FR2370401A1 publication Critical patent/FR2370401A1/en
Application granted granted Critical
Publication of FR2370401B3 publication Critical patent/FR2370401B3/fr
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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • 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
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/045—Mounting

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

Armature or driving mechanism for the diaphragms of loudspeakers. The design is esp. applicable to loudspeakers used at low, or very low frequencies and may be used with conical or plane surface diaphragms. The diaphragm (1B) is extended in both cases into a tube (9) which has a rectangular or circular cross-section, which carries a coil (8) of about six layers of windings. This coil in an air-gas defined by two enclosing walls of ferrite blocks (5A, 5B) the ferrite material having high coercive and demagnetising current characteristics. The block dimensions are such as to occupy approximately half the depth of the coil winding.
FR7633407A 1976-11-05 1976-11-05 Low frequency loudspeaker armature - uses ferrite blocks as fixed component defining air gap for moving coil Granted FR2370401A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7633407A FR2370401A1 (en) 1976-11-05 1976-11-05 Low frequency loudspeaker armature - uses ferrite blocks as fixed component defining air gap for moving coil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7633407A FR2370401A1 (en) 1976-11-05 1976-11-05 Low frequency loudspeaker armature - uses ferrite blocks as fixed component defining air gap for moving coil

Publications (2)

Publication Number Publication Date
FR2370401A1 true FR2370401A1 (en) 1978-06-02
FR2370401B3 FR2370401B3 (en) 1979-07-20

Family

ID=9179583

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7633407A Granted FR2370401A1 (en) 1976-11-05 1976-11-05 Low frequency loudspeaker armature - uses ferrite blocks as fixed component defining air gap for moving coil

Country Status (1)

Country Link
FR (1) FR2370401A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2474266A1 (en) * 1980-01-18 1981-07-24 Rigondeau Robert Wide bandpass flat diaphragm loudspeaker drive - uses separate transducers distributed around diaphragm circumference and has printed circuit conductors
EP0234076A1 (en) * 1986-02-24 1987-09-02 Erl A. Koenig Electrodynamic loudspeaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2474266A1 (en) * 1980-01-18 1981-07-24 Rigondeau Robert Wide bandpass flat diaphragm loudspeaker drive - uses separate transducers distributed around diaphragm circumference and has printed circuit conductors
EP0234076A1 (en) * 1986-02-24 1987-09-02 Erl A. Koenig Electrodynamic loudspeaker

Also Published As

Publication number Publication date
FR2370401B3 (en) 1979-07-20

Similar Documents

Publication Publication Date Title
SU583783A3 (en) Converting device
FR2336721B1 (en)
GB986390A (en) An electro-acoustic transducer
US2535757A (en) Peripherally driven electroacoustical transducer
FR2370401A1 (en) Low frequency loudspeaker armature - uses ferrite blocks as fixed component defining air gap for moving coil
US2391627A (en) Transducer
GB1535938A (en) Electromagnetic transducers
GB672467A (en) Improvements in and relating to sound reproducing devices
GB1164307A (en) Magnets.
JPS567594A (en) Voice coil for flat diaphragm type speaker
US3491215A (en) Acoustic electromagnetic transducer device having means for protecting coil-wire insulation
GB2137047A (en) Moving coil loudspeakers
JPS55121795A (en) Speaker
JPS567593A (en) Magnetic circuit for flat diaphragm speaker
SU1103362A1 (en) Electroacoustical converter
JPS5514773A (en) Small-size speaker
JPS5590200A (en) Squeeze film air speaker
JPS5525231A (en) Vibration unit for ribbon-type electroacoustic converter
JPS5511680A (en) Diaphragm unit for speaker
JPS5325419A (en) Speaker
JPS5863298A (en) Speaker
KR800000764B1 (en) Moving magnet pickup
JPS5683200A (en) Multiway speaker
JPS567592A (en) Magnetic circuit for flat diaphragm speaker
JPS5654197A (en) Stereo pickup cartridge of moving coil type

Legal Events

Date Code Title Description
ST Notification of lapse