AU3558189A - Loudspeaker - Google Patents

Loudspeaker

Info

Publication number
AU3558189A
AU3558189A AU35581/89A AU3558189A AU3558189A AU 3558189 A AU3558189 A AU 3558189A AU 35581/89 A AU35581/89 A AU 35581/89A AU 3558189 A AU3558189 A AU 3558189A AU 3558189 A AU3558189 A AU 3558189A
Authority
AU
Australia
Prior art keywords
low frequency
unit
high frequency
frequency unit
drive
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.)
Abandoned
Application number
AU35581/89A
Inventor
Lawrence Reginald Fincham
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 Electronics Ltd
Original Assignee
KEF Electronics 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10636585&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=AU3558189(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by KEF Electronics Ltd filed Critical KEF Electronics Ltd
Publication of AU3558189A publication Critical patent/AU3558189A/en
Abandoned 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
    • 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 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
    • 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)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Liquid Crystal (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

A compound loudspeaker drive unit is disclosed comprising a low frequency unit having an outwardly and forwardly flaring conical diaphragm (21) and a high frequency drive unit (27) located in or adjacent to the neck of the low frequency conical diaphragm such that the acoustic centres of the two units are substantially coincident and, for a cross-over frequency range in which both drive units contribute significant sound output, the directivity of sound radiation from the high frequency unit (27) as acoustically loaded by the low frequency conical diaphragm (21) is substantially the same as that of the low frequency unit. A magnet structure (28,29,30) for the high frequency unit utilises a magnet (29) formed of neodymium iron boron which enables the high frequency unit (27) to be positioned within a drive coil (23,24) for the low frequency diaphragm while providing a required high value of magnetic flux.
AU35581/89A 1988-05-09 1989-05-05 Loudspeaker Abandoned AU3558189A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8810943 1988-05-09
GB888810943A GB8810943D0 (en) 1988-05-09 1988-05-09 Loudspeaker

Publications (1)

Publication Number Publication Date
AU3558189A true AU3558189A (en) 1989-11-29

Family

ID=10636585

Family Applications (1)

Application Number Title Priority Date Filing Date
AU35581/89A Abandoned AU3558189A (en) 1988-05-09 1989-05-05 Loudspeaker

Country Status (12)

Country Link
EP (1) EP0341926B2 (en)
JP (1) JP2766862B2 (en)
KR (1) KR0171567B1 (en)
AT (1) ATE115352T1 (en)
AU (1) AU3558189A (en)
CA (1) CA1339519C (en)
DE (1) DE68919746T3 (en)
ES (1) ES2065988T3 (en)
GB (2) GB8810943D0 (en)
HK (1) HK71893A (en)
NZ (1) NZ229054A (en)
WO (1) WO1989011201A1 (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0574387A1 (en) * 1990-10-09 1993-12-22 Stage Ac-Company B.V. Electrodynamic loudspeaker with cooling arrangement
US5418336A (en) * 1990-10-17 1995-05-23 Canon Research Centre Europe Ltd. Sound output device
IT1258008B (en) * 1992-01-14 1996-02-20 COMPOUND ELECTROACOUSTIC TRANSDUCER FOR THE REPRODUCTION OF MEDIUM-HIGH FREQUENCIES
DE4225156A1 (en) * 1992-07-30 1994-02-03 Nokia Deutschland Gmbh Magnet system for electro-acoustic transducers
DE4234069A1 (en) * 1992-10-09 1994-04-14 Nokia Deutschland Gmbh Cone speaker in lightweight design
DE29512102U1 (en) * 1995-07-27 1995-10-05 Nokia (Deutschland) Gmbh, 75175 Pforzheim Magnet system
GB2359213B (en) 1999-10-29 2004-05-19 Kef Audio High frequency transducer
CA2352732A1 (en) * 2000-07-11 2002-01-11 Philip Jeffrey Anthony Compound loudspeaker drive unit having a magnet system
GB2364847B (en) * 2000-07-11 2004-10-13 Kef Audio Compound loudspeaker having a magnet system
GB2368484B (en) * 2000-10-25 2004-06-16 B & W Loudspeakers Distributed mode panel type loudspeakers
KR100896738B1 (en) * 2000-12-26 2009-05-11 안데르스 사그렌 Concentric co-planar multiband electro-acoustic converter
ITVI20030041A1 (en) * 2003-03-03 2004-09-04 Alessandro Riccobono COLUMN SOUND DIFFUSER.
AU2008352372B2 (en) * 2008-03-05 2013-12-19 Genelec Oy Nested compound loudspeaker drive unit
DE102008049560B3 (en) * 2008-09-30 2010-07-01 Kuhnke Automotive Gmbh & Co. Kg Electrical oscillating exciter has circular coil arrangement which is engaged into circular gap of magnet arrangement such that coil arrangement and magnet arrangement are movable relative to each other in axial direction
GB2471884A (en) 2009-07-17 2011-01-19 Gp Acoustics Loudspeaker driver surround with at least one stiffening tab
EP2457382B1 (en) * 2009-07-24 2013-09-11 TP Vision Holding B.V. A sound reproduction system
GB2474853B (en) 2009-10-27 2014-01-01 Gp Acoustics Uk Ltd Loudspeakers
FR2955444B1 (en) 2010-01-15 2012-08-03 Phl Audio COAXIAL SPEAKER SYSTEM WITH COMPRESSION CHAMBER
FR2955446B1 (en) 2010-01-15 2015-06-05 Phl Audio ELECTRODYNAMIC TRANSDUCER WITH DOME AND FLOATING SUSPENSION
FR2955447B1 (en) * 2010-01-15 2012-08-03 Phl Audio ELECTRODYNAMIC TRANSDUCER COMPRISING ACOUSTIC WAVE GUIDE PROVIDING THERMAL DISSIPATION
FR2955445B1 (en) 2010-01-15 2013-06-07 Phl Audio ELECTRODYNAMIC TRANSDUCER WITH DOME AND INTERNAL SUSPENSION
CN110830891B (en) * 2018-08-07 2021-05-07 深圳市宝业恒实业股份有限公司 High-power frequency-division-self full-frequency loudspeaker

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB665815A (en) * 1945-01-02 1952-01-30 Marconi Wireless Telegraph Co Improvements in sound reproducing devices
FR1001734A (en) * 1946-08-13 1952-02-27 Subalpine Apparecchiature Elet Wide band loudspeaker with dual vibrating system
JPS5353543A (en) * 1976-10-27 1978-05-16 Nippon Kokan Kk Welding process for tubes
DE2833202A1 (en) * 1978-07-27 1980-02-14 Schering Ag Aryloxy-alkylsulphonyl-amino-indane derivs. - useful as herbicides, analgesics, antiphlogistics, antipyretics, diuretics, etc.
US4492826A (en) * 1982-08-10 1985-01-08 R&C Chiu International, Inc. Loudspeaker
JPS59164390U (en) * 1983-04-15 1984-11-05 株式会社　双信音響製作所 Coaxial composite speaker
GB8402229D0 (en) * 1984-01-27 1984-02-29 Tannoy Ltd Moving coil loudspeaker
MX161230A (en) * 1985-12-23 1990-08-24 Unique Mobility Inc IMPROVEMENTS IN LIGHTWEIGHT ELECTROMAGNETIC TRANSDUCER

Also Published As

Publication number Publication date
ES2065988T3 (en) 1995-03-01
JP2766862B2 (en) 1998-06-18
GB2236929B (en) 1992-11-04
EP0341926B1 (en) 1994-12-07
EP0341926A1 (en) 1989-11-15
WO1989011201A1 (en) 1989-11-16
DE68919746T2 (en) 1995-04-20
GB9023490D0 (en) 1991-01-09
HK71893A (en) 1993-07-30
EP0341926B2 (en) 2001-02-07
DE68919746T3 (en) 2001-06-13
JPH03504310A (en) 1991-09-19
DE68919746D1 (en) 1995-01-19
CA1339519C (en) 1997-10-28
KR0171567B1 (en) 1999-03-30
GB8810943D0 (en) 1988-06-15
KR900702744A (en) 1990-12-08
ATE115352T1 (en) 1994-12-15
NZ229054A (en) 1992-03-26
GB2236929A (en) 1991-04-17

Similar Documents

Publication Publication Date Title
GB2236929B (en) Loudspeaker
US11218810B2 (en) Electric motor
US4868882A (en) Loudspeaker
US6912292B2 (en) Concentric co-planar multiband electro-acoustic converter
DE3469399D1 (en) Loudspeaker with motional feedback
EP1304903A3 (en) Electro-acoustic transducer and electronic device
EP0919107A1 (en) High back emf, high pressure subwoofer
EP0891117A3 (en) Loudspeaker and sound reproduction system employing such a loudspeaker
GB1364669A (en) Electro acoustic transducers
US3766334A (en) Double voice coil loudspeaker
ES8204902A1 (en) Electro-acoustic transducers
ATE71789T1 (en) COAXIAL SPEAKERS.
US9807510B2 (en) Transducer
CN2189808Y (en) Double-sided combined loudspeaking telephone set
SU1103362A1 (en) Electroacoustical converter
JPS5546650A (en) Coaxial speaker
WO2000076270B1 (en) High definition transducer
KR970010255B1 (en) Speaker for high and low frequency
JPS644198A (en) Speaker equipment
GB831944A (en) Improvements in or relating to electro-magnetic sound transducers such as loudspeakers and to sound reproducing apparatus incorporating loudspeakers
JPH04196799A (en) Electromagnetic induction type speaker
JPS57196696A (en) Dynamic type speaker
JPS5797797A (en) Dynamic electroacoustic transducer
GB2205715A (en) Loud Speaker
JPS6439198A (en) Speaker device