GB9701983D0 - Electro-dynamic exciter - Google Patents

Electro-dynamic exciter

Info

Publication number
GB9701983D0
GB9701983D0 GBGB9701983.0A GB9701983A GB9701983D0 GB 9701983 D0 GB9701983 D0 GB 9701983D0 GB 9701983 A GB9701983 A GB 9701983A GB 9701983 D0 GB9701983 D0 GB 9701983D0
Authority
GB
United Kingdom
Prior art keywords
electro
dynamic exciter
exciter
dynamic
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
GBGB9701983.0A
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.)
NVF Tech Ltd
Original Assignee
New Transducers 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=10806869&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=GB9701983(D0) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by New Transducers Ltd filed Critical New Transducers Ltd
Priority to GBGB9701983.0A priority Critical patent/GB9701983D0/en
Publication of GB9701983D0 publication Critical patent/GB9701983D0/en
Priority to AT98902117T priority patent/ATE302538T1/en
Priority to SK1022-99A priority patent/SK102299A3/en
Priority to AU58740/98A priority patent/AU725230B2/en
Priority to CA002279602A priority patent/CA2279602A1/en
Priority to EP98902117A priority patent/EP0956736B2/en
Priority to BR9807534-9A priority patent/BR9807534A/en
Priority to ZA98782A priority patent/ZA98782B/en
Priority to TR1999/01805T priority patent/TR199901805T2/en
Priority to DE69831217T priority patent/DE69831217T3/en
Priority to UA99074424A priority patent/UA42881C2/en
Priority to GEAP19984975A priority patent/GEP20012595B/en
Priority to NZ336497A priority patent/NZ336497A/en
Priority to EEP199900306A priority patent/EE9900306A/en
Priority to CN98801886A priority patent/CN1243653A/en
Priority to PL98334851A priority patent/PL334851A1/en
Priority to KR1019997006300A priority patent/KR20000070079A/en
Priority to MXPA99007004A priority patent/MXPA99007004A/en
Priority to JP53264798A priority patent/JP2001509985A/en
Priority to HU0003000A priority patent/HUP0003000A2/en
Priority to EA199900698A priority patent/EA001014B1/en
Priority to US09/355,312 priority patent/US6618487B1/en
Priority to IL13075098A priority patent/IL130750A0/en
Priority to PCT/GB1998/000307 priority patent/WO1998034320A2/en
Priority to YU35899A priority patent/YU35899A/en
Priority to ARP980100418A priority patent/AR011597A1/en
Priority to CO98004587A priority patent/CO4771176A1/en
Priority to TW087101198A priority patent/TW374285B/en
Priority to IDP980135A priority patent/ID19842A/en
Priority to BG103576A priority patent/BG103576A/en
Priority to CU1999099A priority patent/CU22711A3/en
Priority to NO993719A priority patent/NO993719L/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06Loudspeakers
    • H04R9/066Loudspeakers using the principle of inertia
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06Loudspeakers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04Plane diaphragms
    • H04R7/045Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/16Mounting or tensioning of diaphragms or cones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
GBGB9701983.0A 1996-09-03 1997-01-31 Electro-dynamic exciter Pending GB9701983D0 (en)

Priority Applications (32)

Application Number Priority Date Filing Date Title
GBGB9701983.0A GB9701983D0 (en) 1997-01-31 1997-01-31 Electro-dynamic exciter
ARP980100418A AR011597A1 (en) 1997-01-31 1998-01-30 ELECTRO-DYNAMIC EXCITER AND THE SPEAKER THAT INCLUDES IT
CO98004587A CO4771176A1 (en) 1997-01-31 1998-01-30 ELECTRO-DYNAMIC EXCITER
PL98334851A PL334851A1 (en) 1997-01-31 1998-01-30 Electrodynamic exciter
KR1019997006300A KR20000070079A (en) 1997-01-31 1998-01-30 Electro-dynamic exciter
AU58740/98A AU725230B2 (en) 1997-01-31 1998-01-30 Electro-dynamic exciter
CA002279602A CA2279602A1 (en) 1997-01-31 1998-01-30 Electro-dynamic exciter
EP98902117A EP0956736B2 (en) 1997-01-31 1998-01-30 Electro-dynamic exciter
BR9807534-9A BR9807534A (en) 1997-01-31 1998-01-30 Electrodynamic driver.
ZA98782A ZA98782B (en) 1997-01-31 1998-01-30 Electro-dynamic exciter
TR1999/01805T TR199901805T2 (en) 1997-01-31 1998-01-30 Electro-dynamic stimulant.
DE69831217T DE69831217T3 (en) 1997-01-31 1998-01-30 ELECTRODYNAMIC INERTIAL VIBRATOR
UA99074424A UA42881C2 (en) 1997-01-31 1998-01-30 Loud-speaker and electrodynamic inertial vibration exciter for it
GEAP19984975A GEP20012595B (en) 1997-01-31 1998-01-30 Electro-Dynamic Exciter
NZ336497A NZ336497A (en) 1997-01-31 1998-01-30 Electro-dynamic inertial vibration exciter comprising a coupling member interfit with a magnet assembly
EEP199900306A EE9900306A (en) 1997-01-31 1998-01-30 Electrodynamic exciter
CN98801886A CN1243653A (en) 1997-01-31 1998-01-30 Electro-dynamic exciter
AT98902117T ATE302538T1 (en) 1997-01-31 1998-01-30 ELECTRODYNAMIC INERTIAL VIBRATION EXCITER
SK1022-99A SK102299A3 (en) 1997-01-31 1998-01-30 Electro-dynamic inertial vibration exciter
MXPA99007004A MXPA99007004A (en) 1997-01-31 1998-01-30 Electro-dynamic exciter.
JP53264798A JP2001509985A (en) 1997-01-31 1998-01-30 Electrodynamic exciter
HU0003000A HUP0003000A2 (en) 1997-01-31 1998-01-30 Electro-dynamic exciter
EA199900698A EA001014B1 (en) 1997-01-31 1998-01-30 Electro-magnetic exciter
US09/355,312 US6618487B1 (en) 1996-09-03 1998-01-30 Electro-dynamic exciter
IL13075098A IL130750A0 (en) 1997-01-31 1998-01-30 Electro-dynamic exciter
PCT/GB1998/000307 WO1998034320A2 (en) 1997-01-31 1998-01-30 Electro-dynamic inertial vibration exciter
YU35899A YU35899A (en) 1997-01-31 1998-01-30 Electro-dynamic exciter
IDP980135A ID19842A (en) 1997-01-31 1998-02-02 ELECTRODYNAMIC GENERATOR
TW087101198A TW374285B (en) 1997-01-31 1998-02-02 Electro-dynamic exciter
BG103576A BG103576A (en) 1997-01-31 1999-07-13 Electrodynamic exciter
CU1999099A CU22711A3 (en) 1997-01-31 1999-07-28 ELECTRO-DYNAMIC EXCITER
NO993719A NO993719L (en) 1997-01-31 1999-07-30 Electrodynamic excitation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9701983.0A GB9701983D0 (en) 1997-01-31 1997-01-31 Electro-dynamic exciter

Publications (1)

Publication Number Publication Date
GB9701983D0 true GB9701983D0 (en) 1997-03-19

Family

ID=10806869

Family Applications (1)

Application Number Title Priority Date Filing Date
GBGB9701983.0A Pending GB9701983D0 (en) 1996-09-03 1997-01-31 Electro-dynamic exciter

Country Status (31)

Country Link
EP (1) EP0956736B2 (en)
JP (1) JP2001509985A (en)
KR (1) KR20000070079A (en)
CN (1) CN1243653A (en)
AR (1) AR011597A1 (en)
AT (1) ATE302538T1 (en)
AU (1) AU725230B2 (en)
BG (1) BG103576A (en)
BR (1) BR9807534A (en)
CA (1) CA2279602A1 (en)
CO (1) CO4771176A1 (en)
CU (1) CU22711A3 (en)
DE (1) DE69831217T3 (en)
EA (1) EA001014B1 (en)
EE (1) EE9900306A (en)
GB (1) GB9701983D0 (en)
GE (1) GEP20012595B (en)
HU (1) HUP0003000A2 (en)
ID (1) ID19842A (en)
IL (1) IL130750A0 (en)
MX (1) MXPA99007004A (en)
NO (1) NO993719L (en)
NZ (1) NZ336497A (en)
PL (1) PL334851A1 (en)
SK (1) SK102299A3 (en)
TR (1) TR199901805T2 (en)
TW (1) TW374285B (en)
UA (1) UA42881C2 (en)
WO (1) WO1998034320A2 (en)
YU (1) YU35899A (en)
ZA (1) ZA98782B (en)

Families Citing this family (66)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6278787B1 (en) 1996-09-03 2001-08-21 New Transducers Limited Loudspeakers
GB9822246D0 (en) * 1998-10-13 1998-12-09 New Transducers Ltd Loudspeakers
US6606390B2 (en) 1996-09-03 2003-08-12 New Transducer Limited Loudspeakers
DE19821860A1 (en) * 1998-05-15 1999-11-18 Nokia Deutschland Gmbh Driver for flat panel loudspeaker
CZ20004748A3 (en) 1998-06-22 2001-12-12 Slab Technology Limited Loud speakers
GB9902585D0 (en) * 1999-02-06 1999-03-24 New Transducers Ltd Vibration exciter
GB9903044D0 (en) * 1999-02-11 1999-03-31 New Transducers Ltd Loudspeakers
MY140966A (en) 1999-03-03 2010-02-12 Nec Tokin Corp Vibration actuator having magnetic circuit elastically supported by a spiral damper with increased compliance
GB9911271D0 (en) * 1999-05-15 1999-07-14 New Transducers Ltd Acoustic device
GB2360663A (en) * 1999-12-16 2001-09-26 John Nicholas Marshall Implantable hearing aid
US6751329B2 (en) 2000-09-21 2004-06-15 New Transducers Limited Loudspeaker driver
GB0023134D0 (en) * 2000-09-21 2000-11-01 New Transducers Ltd Loudspeaker driver
GB2368484B (en) * 2000-10-25 2004-06-16 B & W Loudspeakers Distributed mode panel type loudspeakers
DE10053252C2 (en) 2000-10-26 2002-10-10 Elac Electroacustic Gmbh Molding for holding an exciter for a flat diaphragm loudspeaker
US7372968B2 (en) 2000-11-08 2008-05-13 New Transducers Limited Loudspeaker driver
GB0027278D0 (en) * 2000-11-08 2000-12-27 New Transducers Ltd Loudspeaker driver
EP1322137A3 (en) * 2001-11-06 2008-08-27 Hosiden Besson Limited Portable speaker systems and applications thereof
US7447322B2 (en) 2004-01-13 2008-11-04 Brookstone Purchasing, Inc. Speaker having a transparent panel
US10848118B2 (en) 2004-08-10 2020-11-24 Bongiovi Acoustics Llc System and method for digital signal processing
US11431312B2 (en) 2004-08-10 2022-08-30 Bongiovi Acoustics Llc System and method for digital signal processing
US8284955B2 (en) 2006-02-07 2012-10-09 Bongiovi Acoustics Llc System and method for digital signal processing
US10158337B2 (en) 2004-08-10 2018-12-18 Bongiovi Acoustics Llc System and method for digital signal processing
TW200629959A (en) * 2004-09-22 2006-08-16 Citizen Electronics Electro-dynamic exciter
US10701505B2 (en) 2006-02-07 2020-06-30 Bongiovi Acoustics Llc. System, method, and apparatus for generating and digitally processing a head related audio transfer function
US10848867B2 (en) 2006-02-07 2020-11-24 Bongiovi Acoustics Llc System and method for digital signal processing
US10069471B2 (en) 2006-02-07 2018-09-04 Bongiovi Acoustics Llc System and method for digital signal processing
US9615189B2 (en) 2014-08-08 2017-04-04 Bongiovi Acoustics Llc Artificial ear apparatus and associated methods for generating a head related audio transfer function
US11202161B2 (en) 2006-02-07 2021-12-14 Bongiovi Acoustics Llc System, method, and apparatus for generating and digitally processing a head related audio transfer function
RU2456764C2 (en) * 2008-01-04 2012-07-20 Эйрбас Оперэйшнз Гмбх Oscillator for flat loudspeaker, flat loudspeaker and transport vehicle equipped with such loudspeaker
JP5308453B2 (en) 2008-01-04 2013-10-09 エアバス オペレーションズ ゲーエムベーハー Exciter for flat speakers, flat speakers and transportation
WO2010007335A1 (en) * 2008-07-17 2010-01-21 New Transducers Limited Inertial vibration exciter
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
GB0905692D0 (en) 2009-04-02 2009-05-20 Tno Touch sensitive device
CA2758379A1 (en) 2009-04-09 2010-10-14 New Transducers Limited Touch sensitive device
DE102009021466B4 (en) 2009-05-15 2012-03-22 Kuhnke Automotive Gmbh & Co. Kg Electric vibrator
GB2472092A (en) 2009-07-24 2011-01-26 New Transducers Ltd Audio system for an enclosed space with plural independent audio zones
CN101674517B (en) * 2009-09-25 2012-08-29 广东长虹电子有限公司 Acoustic generating device
GB2474047B (en) 2009-10-02 2014-12-17 New Transducers Ltd Touch sensitive device
BR112012010049A2 (en) 2009-10-29 2016-05-24 New Transducers Ltd touch device
EP2577994A4 (en) * 2010-06-07 2017-11-15 Katz, Robert Heat dissipating acoustic transducer with mounting means
GB2482190A (en) 2010-07-23 2012-01-25 New Transducers Ltd Methods of generating a desired haptic sensation in a touch sensitive device
US8565461B2 (en) 2011-03-16 2013-10-22 Cochlear Limited Bone conduction device including a balanced electromagnetic actuator having radial and axial air gaps
JP5706796B2 (en) * 2011-09-29 2015-04-22 スター精密株式会社 Electrodynamic exciter
DE102012209409A1 (en) 2012-06-04 2013-12-05 Kuhnke Automotive Gmbh & Co. Kg Electrical vibrator used in motor car, attenuates relative movement of coil arrangements and magnet arrangements in the axial direction, by the liquid flowing into the electrical vibrator
US9716953B2 (en) 2013-03-15 2017-07-25 Cochlear Limited Electromagnetic transducer with specific internal geometry
US9883318B2 (en) 2013-06-12 2018-01-30 Bongiovi Acoustics Llc System and method for stereo field enhancement in two-channel audio systems
US9264004B2 (en) 2013-06-12 2016-02-16 Bongiovi Acoustics Llc System and method for narrow bandwidth digital signal processing
US9906858B2 (en) 2013-10-22 2018-02-27 Bongiovi Acoustics Llc System and method for digital signal processing
US10639000B2 (en) 2014-04-16 2020-05-05 Bongiovi Acoustics Llc Device for wide-band auscultation
US10820883B2 (en) 2014-04-16 2020-11-03 Bongiovi Acoustics Llc Noise reduction assembly for auscultation of a body
US9615813B2 (en) 2014-04-16 2017-04-11 Bongiovi Acoustics Llc. Device for wide-band auscultation
GB2527533B (en) * 2014-06-24 2016-07-13 Amina Tech Ltd Moving coil drive unit and audio drivers incorporating the same
US20160016090A1 (en) * 2014-07-16 2016-01-21 Traxxas Lp On-board audio system for a model vehicle
US9564146B2 (en) 2014-08-01 2017-02-07 Bongiovi Acoustics Llc System and method for digital signal processing in deep diving environment
US9638672B2 (en) 2015-03-06 2017-05-02 Bongiovi Acoustics Llc System and method for acquiring acoustic information from a resonating body
US9621994B1 (en) 2015-11-16 2017-04-11 Bongiovi Acoustics Llc Surface acoustic transducer
JP2018537910A (en) * 2015-11-16 2018-12-20 ボンジョビ アコースティックス リミテッド ライアビリティー カンパニー Surface acoustic transducer
KR20170115124A (en) * 2016-04-04 2017-10-17 엘지디스플레이 주식회사 Sound generation actuator of panel vibration type and double faced display device with the same
KR102380627B1 (en) * 2017-05-29 2022-03-29 엘지디스플레이 주식회사 Display apparatus
US11035830B2 (en) 2017-06-23 2021-06-15 Cochlear Limited Electromagnetic transducer with dual flux
US11778385B2 (en) 2017-06-23 2023-10-03 Cochlear Limited Electromagnetic transducer with non-axial air gap
KR20200143707A (en) 2018-04-11 2020-12-24 본지오비 어커스틱스 엘엘씨 Audio enhancement hearing protection system
US10620705B2 (en) 2018-06-01 2020-04-14 Google Llc Vibrating the surface of an electronic device to raise the perceived height at a depression in the surface
US10959035B2 (en) 2018-08-02 2021-03-23 Bongiovi Acoustics Llc System, method, and apparatus for generating and digitally processing a head related audio transfer function
GB202009203D0 (en) * 2020-06-17 2020-07-29 Pss Belgium Nv Loudspeaker
DE102021106243B4 (en) 2021-03-15 2023-08-10 ITP GmbH Gesellschaft für intelligente textile Produkte Dispensing device with at least one vibration generator

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917287B1 (en) 1969-11-10 1974-04-30
JPS506377Y1 (en) 1970-04-09 1975-02-24
US3801943A (en) * 1971-06-16 1974-04-02 J Bertagni Electoacoustic transducers and electromagnetic assembly therefor
JPS528437Y2 (en) 1972-02-18 1977-02-22
JPS4970941U (en) 1972-10-03 1974-06-20
EP0054945B1 (en) * 1980-12-19 1985-10-30 Nissan Motor Co., Ltd. Speaker for automotive vehicle audio system
CH645227A5 (en) * 1981-12-22 1984-09-14 Multiphonie Sa ELECTRO-ACOUSTIC TRANSDUCER.
US4914750A (en) * 1987-07-13 1990-04-03 Avm Hess, Inc. Sound transducer
US4926486A (en) * 1987-07-17 1990-05-15 Barsumian Bruce R Transducer assembly for automatic message system
UA51671C2 (en) 1995-09-02 2002-12-16 Нью Транзд'Юсез Лімітед Acoustic device
SK285661B6 (en) 1995-09-02 2007-05-03 New Transducers Limited Inertial vibration transducers

Also Published As

Publication number Publication date
NO993719L (en) 1999-09-29
YU35899A (en) 2001-12-26
CO4771176A1 (en) 1999-04-30
NO993719D0 (en) 1999-07-30
MXPA99007004A (en) 2005-12-12
KR20000070079A (en) 2000-11-25
BR9807534A (en) 2000-06-06
EE9900306A (en) 2000-02-15
EP0956736B2 (en) 2011-09-14
CU22711A3 (en) 2001-09-14
GEP20012595B (en) 2001-11-26
WO1998034320A3 (en) 1998-11-19
EP0956736A2 (en) 1999-11-17
EP0956736B1 (en) 2005-08-17
AU5874098A (en) 1998-08-25
WO1998034320A2 (en) 1998-08-06
DE69831217D1 (en) 2005-09-22
NZ336497A (en) 2000-01-28
EA199900698A1 (en) 2000-04-24
HUP0003000A2 (en) 2001-01-29
PL334851A1 (en) 2000-03-27
AU725230B2 (en) 2000-10-12
DE69831217T3 (en) 2012-02-09
CA2279602A1 (en) 1998-08-06
TR199901805T2 (en) 1999-09-21
TW374285B (en) 1999-11-11
ATE302538T1 (en) 2005-09-15
CN1243653A (en) 2000-02-02
AR011597A1 (en) 2000-08-30
UA42881C2 (en) 2001-11-15
ID19842A (en) 1998-08-06
DE69831217T2 (en) 2006-06-08
BG103576A (en) 2000-03-31
IL130750A0 (en) 2000-06-01
EA001014B1 (en) 2000-08-28
SK102299A3 (en) 2000-08-14
ZA98782B (en) 1998-08-17
JP2001509985A (en) 2001-07-24

Similar Documents

Publication Publication Date Title
IL130750A0 (en) Electro-dynamic exciter
GB9818719D0 (en) Vubration exciter
IL134290A0 (en) Vibration exciter
HK1021108A1 (en) Loudspeakers
ZA983836B (en) Loudspeaker
HU9801901D0 (en) Turbogenerator
GB9717766D0 (en) Methods
IL134834A0 (en) Loudspeakers
GB2332805B (en) Speaker
HK1029035A1 (en) Teeth-cleansing means
GB9708918D0 (en) Methods
EP0954199A4 (en) Loudspeaker
GB9718591D0 (en) Methods
GB9707742D0 (en) Methods
HK1017222A1 (en) Loudspeaker unit
GB9712964D0 (en) Loudspeakers
GB9823900D0 (en) Vibratory system
GB9704142D0 (en) Loudspeakers
GB9708589D0 (en) Seurity means
PL320538A1 (en) Vibrating mill
GB9727193D0 (en) Loudspeakers
ZA9864B (en) Loudspeakers
GB9708797D0 (en) Loudspeakers
GB9704127D0 (en) Loudspeakers
GB9725070D0 (en) Loudspeakers