EP0397621A3 - Movable-coil electrodynamic transducer with a diaphragm - Google Patents

Movable-coil electrodynamic transducer with a diaphragm Download PDF

Info

Publication number
EP0397621A3
EP0397621A3 EP19900830200 EP90830200A EP0397621A3 EP 0397621 A3 EP0397621 A3 EP 0397621A3 EP 19900830200 EP19900830200 EP 19900830200 EP 90830200 A EP90830200 A EP 90830200A EP 0397621 A3 EP0397621 A3 EP 0397621A3
Authority
EP
European Patent Office
Prior art keywords
acoustical
blade
metal
movable
electrical signals
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
EP19900830200
Other languages
German (de)
French (fr)
Other versions
EP0397621B1 (en
EP0397621A2 (en
Inventor
Mario Cesati
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.)
Outline SNC Di Noselli G& C
Outline SNC di Noselli G&C
Original Assignee
Outline SNC Di Noselli G& C
Outline SNC di Noselli G&C
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 Outline SNC Di Noselli G& C, Outline SNC di Noselli G&C filed Critical Outline SNC Di Noselli G& C
Publication of EP0397621A2 publication Critical patent/EP0397621A2/en
Publication of EP0397621A3 publication Critical patent/EP0397621A3/en
Application granted granted Critical
Publication of EP0397621B1 publication Critical patent/EP0397621B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • 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
    • H04R9/022—Cooling arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

The present invention relates to a diaphgram for an electro-acoustical transducer, of the movable-­ coil electrodynamic type, for transforming electrical signals into acoustical signals and diffusing the electrical signals, characterized in that the diaph­ gram comprises a single-piece blade member, made of a metal material of very low density and very good heat conductivity and mechanical characteristics.
The metal blade is resiliently suspended on the perimeter thereof, is metally coupled to the unit of which it forms a portion, and supports the acoustical current wire fixed at the center of mass thereof to the active metal surface.
The acoustical current conductor wire communi­ cates to the blade the heat which is produced by the acoustical current, which is added to that generated in the blade mainly because of the deformation of the resilient suspension.
This generated heat is quickly absorbed by the metal blade and efficiently dissipated by irradia­ ting it into the encompassing air and by conduction through the adjacent masses, thereby holding the tempe­ rature under a danger level.
EP90830200A 1989-05-11 1990-05-08 Movable-coil electrodynamic transducer with a diaphragm Expired - Lifetime EP0397621B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8920460A IT1229706B (en) 1989-05-11 1989-05-11 DIAPHRAGM FOR ELECTROACOUSTIC TRANSDUCER, OF THE ELECTRODYNAMIC TYPE WITH MOBILE COIL, FOR THE CONVERSION OF ELECTRIC SOUND SIGNALS AND FOR THE DIFFUSION OF ITSELF
IT2046089 1989-05-11

Publications (3)

Publication Number Publication Date
EP0397621A2 EP0397621A2 (en) 1990-11-14
EP0397621A3 true EP0397621A3 (en) 1991-08-28
EP0397621B1 EP0397621B1 (en) 1995-09-20

Family

ID=11167283

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90830200A Expired - Lifetime EP0397621B1 (en) 1989-05-11 1990-05-08 Movable-coil electrodynamic transducer with a diaphragm

Country Status (7)

Country Link
EP (1) EP0397621B1 (en)
JP (1) JPH0349500A (en)
CA (1) CA2016478A1 (en)
DE (1) DE69022474T2 (en)
DK (1) DK0397621T3 (en)
ES (1) ES2077665T3 (en)
IT (1) IT1229706B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5346399A (en) * 1998-08-31 2000-03-21 Cytec Technology Corp. Pitch carbon composite components for loudspeakers
ITBS20060008A1 (en) * 2006-01-18 2007-07-19 Outline Di Noselli G & C S N C ADJUSTABLE ADJUSTER FOR COMPRESSION DRIVERS AND DOME LAYERS WITH DIRECT RADIATION.
JP5049883B2 (en) * 2008-06-02 2012-10-17 ホシデン株式会社 Speaker

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744830C (en) * 1940-07-24 1944-11-21 Klangfilm G M B H Membrane for pressure chamber loudspeaker
US2392143A (en) * 1942-11-30 1946-01-01 Rca Corp Loud-speaker
DE2110466B1 (en) * 1971-03-04 1971-11-18 Standard Elek K Lorenz Ag Tweeter
DE2357425A1 (en) * 1972-11-15 1974-05-16 Nippon Musical Instruments Mfg METHOD OF MANUFACTURING A THIN LAYER FROM BERYLLIUM OR ITS ALLOYS
US3991286A (en) * 1975-06-02 1976-11-09 Altec Corporation Heat dissipating device for loudspeaker voice coil
JPS5830297A (en) * 1981-08-17 1983-02-22 Matsushita Electric Ind Co Ltd Dome type speaker

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744830C (en) * 1940-07-24 1944-11-21 Klangfilm G M B H Membrane for pressure chamber loudspeaker
US2392143A (en) * 1942-11-30 1946-01-01 Rca Corp Loud-speaker
DE2110466B1 (en) * 1971-03-04 1971-11-18 Standard Elek K Lorenz Ag Tweeter
DE2357425A1 (en) * 1972-11-15 1974-05-16 Nippon Musical Instruments Mfg METHOD OF MANUFACTURING A THIN LAYER FROM BERYLLIUM OR ITS ALLOYS
US3991286A (en) * 1975-06-02 1976-11-09 Altec Corporation Heat dissipating device for loudspeaker voice coil
JPS5830297A (en) * 1981-08-17 1983-02-22 Matsushita Electric Ind Co Ltd Dome type speaker

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
AES - JOURNAL OF THE AUDIO ENGINEERING SOCIETY:AUDIO/ACOUSTICS/APPLICATIONS, vol. 35, no. 10, October 1987, pages 778-791, New York, NY, US; C.A. HENRICKSEN: "Heat-transfer mechanisms in loudspeakers: Analysis, measurement, and design" *

Also Published As

Publication number Publication date
EP0397621B1 (en) 1995-09-20
DE69022474T2 (en) 1996-05-23
DK0397621T3 (en) 1996-02-05
CA2016478A1 (en) 1990-11-11
DE69022474D1 (en) 1995-10-26
JPH0349500A (en) 1991-03-04
IT8920460A0 (en) 1989-05-11
EP0397621A2 (en) 1990-11-14
IT1229706B (en) 1991-09-07
ES2077665T3 (en) 1995-12-01

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