EP1096830A3 - High frequency transducer - Google Patents

High frequency transducer Download PDF

Info

Publication number
EP1096830A3
EP1096830A3 EP00309554A EP00309554A EP1096830A3 EP 1096830 A3 EP1096830 A3 EP 1096830A3 EP 00309554 A EP00309554 A EP 00309554A EP 00309554 A EP00309554 A EP 00309554A EP 1096830 A3 EP1096830 A3 EP 1096830A3
Authority
EP
European Patent Office
Prior art keywords
dome
ellipse
high frequency
constructed
length
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.)
Ceased
Application number
EP00309554A
Other languages
German (de)
French (fr)
Other versions
EP1096830A2 (en
Inventor
Philip Jeffrey Anthony
Julian Roger Wright
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.)
KEF Audio UK Ltd
Original Assignee
KEF Audio UK 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
Priority claimed from GB9925674A external-priority patent/GB2359213B/en
Application filed by KEF Audio UK Ltd filed Critical KEF Audio UK Ltd
Publication of EP1096830A2 publication Critical patent/EP1096830A2/en
Publication of EP1096830A3 publication Critical patent/EP1096830A3/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/127—Non-planar diaphragms or cones dome-shaped
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2207/00—Details of diaphragms or cones for electromechanical transducers or their suspension covered by H04R7/00 but not provided for in H04R7/00 or in H04R2307/00
    • H04R2207/021—Diaphragm extensions, not necessarily integrally formed, e.g. skirts, rims, flanges

Landscapes

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

Abstract

A high frequency transducer 10 having a dome diaphragm 52 with a configuration of a bisected ellipse to overcome the distortion and breaking point of prior art domes even at frequencies above 30kHz. The dome diaphragm having an annular skirt 54 extending therefrom in an integral fashion and connecting to a disc shaped plate 30 of the transducer. A voice coil 60 of cylindrical section is directly connected to the skirt at a region of close proximity to said dome. The dome is constructed of a rigid material such as a metal, an alloy, a metalloid such as, but not limited to, titanium, aluminum, and boron, or a combination thereof. The dome is constructed in accordance with a general formula for an ellipse (x2/a2)+(y2/b2)=1, and a>b, wherein a is half of the length of a major axis and b is half of the length of a minor axis of the ellipse.
EP00309554A 1999-10-29 2000-10-30 High frequency transducer Ceased EP1096830A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9925674 1999-10-29
GB9925674A GB2359213B (en) 1999-10-29 1999-10-29 High frequency transducer
US09/521,911 US6792127B1 (en) 1999-10-29 2000-03-09 Elliptical dome for high frequency transducer
US521911 2000-03-09

Publications (2)

Publication Number Publication Date
EP1096830A2 EP1096830A2 (en) 2001-05-02
EP1096830A3 true EP1096830A3 (en) 2003-05-02

Family

ID=26316039

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00309554A Ceased EP1096830A3 (en) 1999-10-29 2000-10-30 High frequency transducer

Country Status (2)

Country Link
EP (1) EP1096830A3 (en)
JP (1) JP2001169386A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005062664A1 (en) 2003-12-22 2005-07-07 Matsushita Electric Industrial Co., Ltd. Speaker and device using the same
JP2007235552A (en) * 2006-03-01 2007-09-13 Pioneer Electronic Corp Speaker, diaphragm for dome speaker, and method of manufacturing diaphragm for dome speaker
CH708956B1 (en) * 2013-12-09 2021-08-31 Montres Breguet Sa Acoustic radiation membrane for a musical watch.
EP2881807B1 (en) * 2013-12-09 2019-11-27 Montres Breguet SA Acoustic dispersion membrane for a musical watch
JP7708789B2 (en) * 2020-12-24 2025-07-15 フォスター電機株式会社 Sound emitting member for speaker and speaker device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE626465C (en) * 1929-05-17 1936-02-27 Telefunken Gmbh Electrodynamic large area loudspeaker
DE2241445A1 (en) * 1972-08-23 1974-03-21 Gottlob Widmann & Soehne Gmbh Dome shaped loudspeaker diaphragm of rigid foam - e.g. polyurethane is resistant to high amplitude distortion, has good damping properties and is cheap
US4135601A (en) * 1975-06-24 1979-01-23 Pioneer Electronic Corporation Boron coated diaphragm for use in a loud speaker
US5150419A (en) * 1990-10-06 1992-09-22 Nokia Unterhaltungselektronik Gmbh Calotte-type treble loudspeaker
US5181253A (en) * 1991-01-08 1993-01-19 Southern Audio Services, Inc. Loudspeaker assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE626465C (en) * 1929-05-17 1936-02-27 Telefunken Gmbh Electrodynamic large area loudspeaker
DE2241445A1 (en) * 1972-08-23 1974-03-21 Gottlob Widmann & Soehne Gmbh Dome shaped loudspeaker diaphragm of rigid foam - e.g. polyurethane is resistant to high amplitude distortion, has good damping properties and is cheap
US4135601A (en) * 1975-06-24 1979-01-23 Pioneer Electronic Corporation Boron coated diaphragm for use in a loud speaker
US5150419A (en) * 1990-10-06 1992-09-22 Nokia Unterhaltungselektronik Gmbh Calotte-type treble loudspeaker
US5181253A (en) * 1991-01-08 1993-01-19 Southern Audio Services, Inc. Loudspeaker assembly

Also Published As

Publication number Publication date
JP2001169386A (en) 2001-06-22
EP1096830A2 (en) 2001-05-02

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