GB8810943D0 - Loudspeaker - Google Patents

Loudspeaker

Info

Publication number
GB8810943D0
GB8810943D0 GB888810943A GB8810943A GB8810943D0 GB 8810943 D0 GB8810943 D0 GB 8810943D0 GB 888810943 A GB888810943 A GB 888810943A GB 8810943 A GB8810943 A GB 8810943A GB 8810943 D0 GB8810943 D0 GB 8810943D0
Authority
GB
United Kingdom
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.)
Pending
Application number
GB888810943A
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=GB8810943(D0) "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
Priority to GB888810943A priority Critical patent/GB8810943D0/en
Publication of GB8810943D0 publication Critical patent/GB8810943D0/en
Priority to PCT/GB1989/000476 priority patent/WO1989011201A1/en
Priority to DE68919746T priority patent/DE68919746T3/en
Priority to AU35581/89A priority patent/AU3558189A/en
Priority to EP89304569A priority patent/EP0341926B2/en
Priority to AT89304569T priority patent/ATE115352T1/en
Priority to ES89304569T priority patent/ES2065988T3/en
Priority to JP1505153A priority patent/JP2766862B2/en
Priority to CA000598852A priority patent/CA1339519C/en
Priority to KR1019900700039A priority patent/KR0171567B1/en
Priority to NZ229054A priority patent/NZ229054A/en
Priority to GB9023490A priority patent/GB2236929B/en
Priority to NO19904830A priority patent/NO317793B1/en
Priority to HK718/93A priority patent/HK71893A/en
Priority to SG114393A priority patent/SG114393G/en
Priority to US08/291,721 priority patent/US5548657A/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
    • 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.
GB888810943A 1988-05-09 1988-05-09 Loudspeaker Pending GB8810943D0 (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
GB888810943A GB8810943D0 (en) 1988-05-09 1988-05-09 Loudspeaker
KR1019900700039A KR0171567B1 (en) 1988-05-09 1989-05-05 Loudspeaker
DE68919746T DE68919746T3 (en) 1988-05-09 1989-05-05 Speaker.
JP1505153A JP2766862B2 (en) 1988-05-09 1989-05-05 Loudspeaker
CA000598852A CA1339519C (en) 1988-05-09 1989-05-05 Loudspeaker
AU35581/89A AU3558189A (en) 1988-05-09 1989-05-05 Loudspeaker
EP89304569A EP0341926B2 (en) 1988-05-09 1989-05-05 Loudspeaker
AT89304569T ATE115352T1 (en) 1988-05-09 1989-05-05 SPEAKER.
ES89304569T ES2065988T3 (en) 1988-05-09 1989-05-05 SPEAKER.
PCT/GB1989/000476 WO1989011201A1 (en) 1988-05-09 1989-05-05 Loudspeaker
NZ229054A NZ229054A (en) 1988-05-09 1989-05-09 Compound loudspeaker drive unit
GB9023490A GB2236929B (en) 1988-05-09 1990-10-29 Loudspeaker
NO19904830A NO317793B1 (en) 1988-05-09 1990-11-06 Hoyttalerdrivenhet
HK718/93A HK71893A (en) 1988-05-09 1993-07-22 Loudspeaker
SG114393A SG114393G (en) 1988-05-09 1993-10-18 Loudspeaker
US08/291,721 US5548657A (en) 1988-05-09 1994-08-16 Compound loudspeaker drive unit

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB8810943D0 true GB8810943D0 (en) 1988-06-15

Family

ID=10636585

Family Applications (2)

Application Number Title Priority Date Filing Date
GB888810943A Pending GB8810943D0 (en) 1988-05-09 1988-05-09 Loudspeaker
GB9023490A Expired - Lifetime GB2236929B (en) 1988-05-09 1990-10-29 Loudspeaker

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB9023490A Expired - Lifetime GB2236929B (en) 1988-05-09 1990-10-29 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
WO1992006569A1 (en) * 1990-10-09 1992-04-16 Stage Accompany B.V. Electrodynamic loudspeaker with cooling arrangement
JP3426598B2 (en) * 1990-10-17 2003-07-14 キヤノン オイローパ エヌ．ヴェー． 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 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
JP3976681B2 (en) * 2000-12-26 2007-09-19 サグレン、アンデルス Concentric coplanar multiband electroacoustic transducer
ITVI20030041A1 (en) * 2003-03-03 2004-09-04 Alessandro Riccobono COLUMN SOUND DIFFUSER.
JP5258907B2 (en) * 2008-03-05 2013-08-07 ゲネレク オーワイ 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
WO2011010254A1 (en) * 2009-07-24 2011-01-27 Koninklijke Philips Electronics N.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
FR2955445B1 (en) * 2010-01-15 2013-06-07 Phl Audio ELECTRODYNAMIC TRANSDUCER WITH DOME AND INTERNAL SUSPENSION
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
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
NZ229054A (en) 1992-03-26
HK71893A (en) 1993-07-30
EP0341926B1 (en) 1994-12-07
DE68919746T3 (en) 2001-06-13
KR0171567B1 (en) 1999-03-30
EP0341926B2 (en) 2001-02-07
CA1339519C (en) 1997-10-28
DE68919746T2 (en) 1995-04-20
JPH03504310A (en) 1991-09-19
GB2236929A (en) 1991-04-17
GB9023490D0 (en) 1991-01-09
ES2065988T3 (en) 1995-03-01
KR900702744A (en) 1990-12-08
AU3558189A (en) 1989-11-29
ATE115352T1 (en) 1994-12-15
WO1989011201A1 (en) 1989-11-16
EP0341926A1 (en) 1989-11-15
GB2236929B (en) 1992-11-04
JP2766862B2 (en) 1998-06-18
DE68919746D1 (en) 1995-01-19

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