EP1618761A2 - Direct radiation, pure beryllium acoustic transducer having a concave membrane, used for audio applications, especially for loudspeaker cabinets - Google Patents
Direct radiation, pure beryllium acoustic transducer having a concave membrane, used for audio applications, especially for loudspeaker cabinetsInfo
- Publication number
- EP1618761A2 EP1618761A2 EP04742314A EP04742314A EP1618761A2 EP 1618761 A2 EP1618761 A2 EP 1618761A2 EP 04742314 A EP04742314 A EP 04742314A EP 04742314 A EP04742314 A EP 04742314A EP 1618761 A2 EP1618761 A2 EP 1618761A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- dome
- alloys
- loudspeaker
- beryllium
- sheet
- 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.)
- Withdrawn
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 31
- 229910052790 beryllium Inorganic materials 0.000 title claims abstract description 27
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 230000005855 radiation Effects 0.000 title claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 18
- 239000000956 alloy Substances 0.000 claims abstract description 18
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 15
- 229910000952 Be alloy Inorganic materials 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims abstract description 6
- 238000010168 coupling process Methods 0.000 claims abstract description 6
- 238000005859 coupling reaction Methods 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 230000004044 response Effects 0.000 claims description 9
- 239000011777 magnesium Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 6
- 150000002739 metals Chemical class 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000002144 chemical decomposition reaction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims 4
- 238000013016 damping Methods 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000000135 prohibitive effect Effects 0.000 description 2
- 238000009666 routine test Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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
- 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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1058—Manufacture or assembly
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
- H04R2201/029—Manufacturing aspects of enclosures transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/027—Diaphragms comprising metallic materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49005—Acoustic transducer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/4908—Acoustic transducer
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0304733A FR2854021B1 (en) | 2003-04-16 | 2003-04-16 | ACOUSTIC TRANSDUCER IN DIRECT RADIATION DIRECT RADIATION BERYLLIUM ACRYLIC, FOR CONCAVE-SHAPED MEMBRANE, FOR AUDIO APPLICATIONS ESPECIALLY FOR ACOUSTIC SPEAKERS |
PCT/FR2004/000704 WO2004095881A2 (en) | 2003-04-16 | 2004-03-22 | Beryllium acoustic transducer |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1618761A2 true EP1618761A2 (en) | 2006-01-25 |
Family
ID=33041897
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04742314A Withdrawn EP1618761A2 (en) | 2003-04-16 | 2004-03-22 | Direct radiation, pure beryllium acoustic transducer having a concave membrane, used for audio applications, especially for loudspeaker cabinets |
Country Status (10)
Country | Link |
---|---|
US (2) | US20060113144A1 (en) |
EP (1) | EP1618761A2 (en) |
JP (1) | JP2006523981A (en) |
KR (1) | KR20060008898A (en) |
CN (1) | CN1774954A (en) |
AU (1) | AU2004231892A1 (en) |
CA (1) | CA2522519C (en) |
FR (1) | FR2854021B1 (en) |
RU (1) | RU2005135455A (en) |
WO (1) | WO2004095881A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017103360A1 (en) | 2015-12-14 | 2017-06-22 | Focal Jmlab | Acoustic membrane for a loudspeaker and corresponding loudspeaker |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2854021B1 (en) * | 2003-04-16 | 2006-03-31 | Focal Jmlab | ACOUSTIC TRANSDUCER IN DIRECT RADIATION DIRECT RADIATION BERYLLIUM ACRYLIC, FOR CONCAVE-SHAPED MEMBRANE, FOR AUDIO APPLICATIONS ESPECIALLY FOR ACOUSTIC SPEAKERS |
US8850893B2 (en) * | 2007-12-05 | 2014-10-07 | Valtion Teknillinen Tutkimuskeskus | Device for measuring pressure, variation in acoustic pressure, a magnetic field, acceleration, vibration, or the composition of a gas |
EP2139265A1 (en) * | 2008-06-23 | 2009-12-30 | Focal-Jmlab (Sa) | Motor for a tweeter |
EP2180721A1 (en) * | 2008-10-21 | 2010-04-28 | Lautsprecher Teufel GmbH | Flat membrane loudspeaker |
WO2015032085A1 (en) * | 2013-09-09 | 2015-03-12 | 东莞泉声电子有限公司 | Acoustic metal diaphragm |
CN104333841A (en) * | 2014-10-27 | 2015-02-04 | 陈建兴 | Titanium sound film hot-processing air pressure forming method |
CN204929239U (en) * | 2015-08-10 | 2015-12-30 | 常州美欧电子有限公司 | Loudspeaker |
CN204929240U (en) * | 2015-08-10 | 2015-12-30 | 常州美欧电子有限公司 | Loudspeaker |
CN106954152B (en) * | 2015-08-13 | 2019-07-19 | 深圳市韶音科技有限公司 | Bone-conduction speaker |
CN208353583U (en) * | 2016-12-02 | 2019-01-08 | 宁波升亚电子有限公司 | High pitch loudspeaker |
CN107854136A (en) * | 2017-11-24 | 2018-03-30 | 江门大诚医疗器械有限公司 | One kind is applied to stethoscopic metal vibration diaphragm structure |
CN110620974B (en) * | 2018-06-19 | 2022-01-18 | 宁波升亚电子有限公司 | High pitch loudspeaker and manufacturing method thereof |
GB201911086D0 (en) * | 2019-08-02 | 2019-09-18 | Element Six Tech Ltd | Non-planar diomand body |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2051106A (en) * | 1979-05-28 | 1981-01-14 | Pioneer Electronic Corp | Molding compositions and Diaphragms, Arm Pipes and Head Shells Molded therefrom |
Family Cites Families (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL37811C (en) * | 1931-07-18 | |||
US2974204A (en) * | 1954-07-06 | 1961-03-07 | Kane Corp Du | Transducer |
DE2500397C2 (en) * | 1975-01-07 | 1986-05-28 | Schorlemer, Frhr. von, Reinfried, Dipl.-Phys., 3500 Kassel | Membrane for an electroacoustic transducer system and an electroacoustic transducer system equipped with it |
US4135601A (en) * | 1975-06-24 | 1979-01-23 | Pioneer Electronic Corporation | Boron coated diaphragm for use in a loud speaker |
US4129195A (en) * | 1975-12-24 | 1978-12-12 | Sanyo Electric Co., Ltd. | Diaphragm for speaker |
GB1563511A (en) * | 1976-03-19 | 1980-03-26 | Harwood H | Diaphragms for electroacoustic transducers |
JPS5379525A (en) * | 1976-12-23 | 1978-07-14 | Sony Corp | Compound diaphtagm for speakers |
US4112168A (en) * | 1977-03-23 | 1978-09-05 | Motorola, Inc. | High stiffness speaker cone |
US4709392A (en) * | 1984-03-08 | 1987-11-24 | Onkyo Kabushiki Kaisha | Dome speaker with a diaphragm having at least one elongated cut-out portion |
JPS63274295A (en) * | 1987-04-30 | 1988-11-11 | Yamaha Corp | Production of diaphragm for acoustic equipment |
US5062140A (en) * | 1988-04-27 | 1991-10-29 | Sony Corporation | Induction speaker |
JP2517445B2 (en) * | 1990-06-05 | 1996-07-24 | スカイアルミニウム株式会社 | A1 alloy plate for forming diaphragm and method for manufacturing the same |
US5135582A (en) * | 1990-08-02 | 1992-08-04 | Yamaha Corporation | Method for forming a diaphragm and diaphragm |
JPH04287498A (en) * | 1991-03-15 | 1992-10-13 | Yamaha Corp | Diaphragm for acoustic device |
US5744761A (en) * | 1993-06-28 | 1998-04-28 | Matsushita Electric Industrial Co., Ltd. | Diaphragm-edge integral moldings for speakers and acoustic transducers comprising same |
US6243472B1 (en) * | 1997-09-17 | 2001-06-05 | Frank Albert Bilan | Fully integrated amplified loudspeaker |
FR2802759B1 (en) * | 1999-12-16 | 2002-02-15 | Pierre Fontaine | METHOD FOR MANUFACTURING SURFACE MECHANICAL ABSORBENT MATERIAL, SURFACE MECHANICAL ABSORBENT MATERIAL AND ELECTROACOUSTIC TRANSDUCER THUS OBTAINED |
JP2001189990A (en) * | 1999-12-28 | 2001-07-10 | Jsp Corp | Speaker diaphragm and material for speaker diaphragm |
US6394224B1 (en) * | 2000-03-30 | 2002-05-28 | Chun-I Liu | Structure of speaker |
JP2002369284A (en) * | 2001-06-04 | 2002-12-20 | Foster Electric Co Ltd | Diaphragm for speaker, and method for manufacturing the same |
JP3799001B2 (en) * | 2001-09-10 | 2006-07-19 | 富士彦 小林 | Piezoelectric speaker |
KR100390003B1 (en) * | 2002-10-02 | 2003-07-04 | Joo Bae Kim | Bone-conduction speaker using vibration plate and mobile telephone using the same |
DE20300880U1 (en) * | 2003-01-21 | 2003-04-10 | Meiloon Ind Co | speaker |
FR2854021B1 (en) * | 2003-04-16 | 2006-03-31 | Focal Jmlab | ACOUSTIC TRANSDUCER IN DIRECT RADIATION DIRECT RADIATION BERYLLIUM ACRYLIC, FOR CONCAVE-SHAPED MEMBRANE, FOR AUDIO APPLICATIONS ESPECIALLY FOR ACOUSTIC SPEAKERS |
US7053705B2 (en) * | 2003-12-22 | 2006-05-30 | Tymphany Corporation | Mixed-mode (current-voltage) audio amplifier |
JP2005333277A (en) * | 2004-05-18 | 2005-12-02 | Pioneer Electronic Corp | Method of manufacturing center cap for speaker |
JP2005333322A (en) * | 2004-05-19 | 2005-12-02 | Pioneer Electronic Corp | Bobbin-integrated magnesium diaphragm, its manufacturing method, and speaker device using the same |
US7274796B2 (en) * | 2004-07-24 | 2007-09-25 | Yen-Chen Chan | Reinforced speaker damper |
JP2006148401A (en) * | 2004-11-18 | 2006-06-08 | Matsushita Electric Ind Co Ltd | Speaker and its manufacturing method |
-
2003
- 2003-04-16 FR FR0304733A patent/FR2854021B1/en not_active Expired - Lifetime
-
2004
- 2004-03-22 EP EP04742314A patent/EP1618761A2/en not_active Withdrawn
- 2004-03-22 JP JP2006505744A patent/JP2006523981A/en active Pending
- 2004-03-22 WO PCT/FR2004/000704 patent/WO2004095881A2/en active Application Filing
- 2004-03-22 CA CA2522519A patent/CA2522519C/en not_active Expired - Fee Related
- 2004-03-22 KR KR1020057019673A patent/KR20060008898A/en not_active Application Discontinuation
- 2004-03-22 RU RU2005135455/28A patent/RU2005135455A/en not_active Application Discontinuation
- 2004-03-22 AU AU2004231892A patent/AU2004231892A1/en not_active Abandoned
- 2004-03-22 CN CNA2004800103572A patent/CN1774954A/en active Pending
- 2004-03-22 US US10/553,185 patent/US20060113144A1/en not_active Abandoned
-
2009
- 2009-02-04 US US12/365,537 patent/US7878297B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2051106A (en) * | 1979-05-28 | 1981-01-14 | Pioneer Electronic Corp | Molding compositions and Diaphragms, Arm Pipes and Head Shells Molded therefrom |
Non-Patent Citations (4)
Title |
---|
ANONYMOUS: "Ultra Audio Goes to Son et Image 2003: Part One", ULTRAAUDIO.COM, 28 March 2003 (2003-03-28), XP055100472, Retrieved from the Internet <URL:http://www.ultraaudio.com/features/sam_20030501.htm> [retrieved on 20140205] * |
C K SYN ET AL: "An Analysis of Gas Pressure Forming of Superplastic AL 5083 Alloy", 2001 INTERNATIONAL CONFERENCE ON LIGHT MATERIALS FOR TRANSPORTATION SYSTEMS, 6 March 2001 (2001-03-06), XP055100474, Retrieved from the Internet <URL:https://e-reports-ext.llnl.gov/pdf/244010.pdf> [retrieved on 20140205] * |
JAN DE JEU: "JM Lab", 23 November 2002 (2002-11-23), XP055100468, Retrieved from the Internet <URL:http://www.hifi.nl/artikel/1479/JM-Lab.html> [retrieved on 20140205] * |
KEELE B: "JMLAB SPECTRAL 913.1 SPEAKER", AUDIO, AUDIO. PHILADELPHIA, US, vol. 79, no. 11, 1 November 1995 (1995-11-01), pages 56 - 58,60,62, XP000755170, ISSN: 0004-752X * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017103360A1 (en) | 2015-12-14 | 2017-06-22 | Focal Jmlab | Acoustic membrane for a loudspeaker and corresponding loudspeaker |
US10820111B2 (en) | 2015-12-14 | 2020-10-27 | Focal Jmlab | Acoustic membrane for a loudspeaker and corresponding loudspeaker |
Also Published As
Publication number | Publication date |
---|---|
RU2005135455A (en) | 2007-06-10 |
WO2004095881A3 (en) | 2004-12-29 |
CN1774954A (en) | 2006-05-17 |
US7878297B2 (en) | 2011-02-01 |
FR2854021A1 (en) | 2004-10-22 |
US20090200101A1 (en) | 2009-08-13 |
CA2522519A1 (en) | 2004-11-04 |
FR2854021B1 (en) | 2006-03-31 |
CA2522519C (en) | 2012-12-04 |
KR20060008898A (en) | 2006-01-27 |
WO2004095881A2 (en) | 2004-11-04 |
AU2004231892A1 (en) | 2004-11-04 |
JP2006523981A (en) | 2006-10-19 |
US20060113144A1 (en) | 2006-06-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2522519C (en) | Direct radiation pure beryllium acoustic transducer having a concave membrane, used for audio applications, especially for loudspeaker cabinets | |
FR2867938A1 (en) | EARPHONE STRUCTURE WITH COMPOSITE SOUND FIELD | |
JP5662462B2 (en) | Omnidirectional speaker | |
JP4861825B2 (en) | Speaker system | |
JP4273343B2 (en) | Playback apparatus and playback method | |
US10165352B2 (en) | Ambient sonic low-pressure equalization | |
EP1599066A2 (en) | Bobbin integrated type magnesium diaphragm, manufacturing method thereof, and speaker device using the diaphragm | |
FR2859864A1 (en) | SPEAKER AND CORRESPONDING ACOUSTIC SPEAKER | |
FR2765767A1 (en) | Lengthened electro-acoustic transducer for high-fi loudspeakers | |
FR2580886A1 (en) | MULTIFOICE ACOUSTIC SPEAKER | |
FR2747004A1 (en) | ELECTROSTATIC CONVERTER | |
CH710166A2 (en) | Arrangement of acoustic radiation membranes for a musical watch or ring. | |
CA2521785A1 (en) | Multi-layered membranes consisting of a plurality of materials, for the loudspeaker of a high fidelity loudspeaker cabinet | |
EP3469812B1 (en) | Electrodynamic broad band transducer for audio headphone and respective audio headphone | |
JP2007043631A (en) | Speaker using cone-type piezoelectric diaphragm | |
FR3065135A1 (en) | ACOUSTIC SPEAKER | |
EP0335892B1 (en) | Method for correcting the amplitude/frequency response of an electro-acoustic transducing system and corresponding transducer assembly | |
Wörner et al. | Diamond loudspeaker cones for high-end audio components | |
JPH04287498A (en) | Diaphragm for acoustic device | |
FR2829658A1 (en) | Sound purification and amplification device which amplifies sounds produced by an acoustic signal restitution device incorporating at least two transducers, includes a small metal alloy dish | |
JPH07226999A (en) | Piezoelectric speaker | |
EP2139265A1 (en) | Motor for a tweeter | |
FR2674718A1 (en) | METHOD FOR MANUFACTURING AN ELECTRODYNAMIC SPEAKER MEMBRANE WITH HIGH INTERNAL LOSSES AND HIGH RIGIDITY. | |
JP2004320354A (en) | Speaker | |
EP2164278A2 (en) | Single-unit high-fidelity device with a stereophonic speaker enclosure. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20051116 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
DAX | Request for extension of the european patent (deleted) | ||
REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1084818 Country of ref document: HK |
|
REG | Reference to a national code |
Ref country code: HK Ref legal event code: WD Ref document number: 1084818 Country of ref document: HK |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: H04R 31/00 20060101ALI20140128BHEP Ipc: H04R 7/12 20060101AFI20140128BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20140624 |