EP1616457A1 - Membran aus mehreren lagen verschiedener materialien für einen lautsprecher einer hifi lautsprecherbox - Google Patents
Membran aus mehreren lagen verschiedener materialien für einen lautsprecher einer hifi lautsprecherboxInfo
- Publication number
- EP1616457A1 EP1616457A1 EP04720899A EP04720899A EP1616457A1 EP 1616457 A1 EP1616457 A1 EP 1616457A1 EP 04720899 A EP04720899 A EP 04720899A EP 04720899 A EP04720899 A EP 04720899A EP 1616457 A1 EP1616457 A1 EP 1616457A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- external
- membrane according
- core
- internal
- glass
- 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- Withdrawn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 42
- 239000000463 material Substances 0.000 title claims description 14
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000006260 foam Substances 0.000 claims description 17
- 239000011521 glass Substances 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 12
- -1 polyethylene Polymers 0.000 claims description 5
- 229920003235 aromatic polyamide Polymers 0.000 claims description 4
- 238000005470 impregnation Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004800 polyvinyl chloride Substances 0.000 claims description 4
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 4
- 229920000271 Kevlar® Polymers 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000004761 kevlar Substances 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 claims description 2
- 229920005372 Plexiglas® Polymers 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 229920000508 Vectran Polymers 0.000 claims description 2
- 239000004979 Vectran Substances 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 2
- 229920006327 polystyrene foam Polymers 0.000 claims description 2
- 238000001228 spectrum Methods 0.000 claims description 2
- 239000004616 structural foam Substances 0.000 claims description 2
- 229920005992 thermoplastic resin Polymers 0.000 claims description 2
- 229920001187 thermosetting polymer Polymers 0.000 claims description 2
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 2
- 229920001567 vinyl ester resin Polymers 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 2
- 239000002648 laminated material Substances 0.000 abstract 2
- 241000195940 Bryophyta Species 0.000 abstract 1
- 235000011929 mousse Nutrition 0.000 abstract 1
- 238000013016 damping Methods 0.000 description 8
- 230000004044 response Effects 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- 239000005557 antagonist Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002356 single layer Substances 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
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
- H04R7/125—Non-planar diaphragms or cones comprising a plurality of sections or layers comprising a plurality of superposed layers in contact
-
- 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
- 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
- H04R2307/023—Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials
-
- 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
- H04R2307/025—Diaphragms comprising polymeric materials
-
- 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
- H04R2307/029—Diaphragms comprising fibres
-
- 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
Definitions
- the present invention relates to the technical sector of sound reproducers using an emissive membrane.
- the diaphragm of a transducer provides mechanical coupling between a voice coil, placed in an air gap and traversed by a modulated current, and the air molecules to ensure sound reproduction.
- a voice coil placed in an air gap and traversed by a modulated current
- the air molecules to ensure sound reproduction.
- three criteria govern the mechanical qualities of a membrane: its weight, its flexural rigidity and its damping.
- the membrane is usually produced in a single-body structure in a material offering a good compromise on the three preceding criteria. Result: for a medium woofer, for example, 16.5 cm, it is impossible to have the rigidity desired for an ideal reproduction of the bass while controlling the damping for correct reproduction of the medium zone.
- a mono structural solution does not allow individual optimization of the criteria.
- the structure takes precedence over the material in terms of rigidity.
- the proposed solution provides a bending stiffness almost 20 times greater than conventional solutions for a cone of identical surface mass (6854 N / mm for the present invention against 366N / mm for the cellulose pulp, 313 N / mm for the Kevlar TM impregnated, 77 N / mm for aluminum and 42 N / mm for polypropylene).
- the internal and / or external layers allow a fine adjustment of the mass of the stiffness and of the speed of sound propagation in the membrane. As indicated above, this leads to a multitude of parameters, including certain antagonists.
- the Applicant has however managed to develop multilayer, multi-material membranes, of reasonable cost and with very improved characteristics.
- the unique advantage of the technology thus developed is that it can mechanically regulate the response of a transducer by adjusting the characteristics of the membrane at the source.
- Figure 1A shows a membrane 1 according to the invention
- Figure 1B a sectional view of the detail of the layers or “folds” and the core of this membrane.
- Figure 2 is obviously given without limitation.
- Figures 2 to 9 represent non-limiting structures and their property curves relating to the non-limiting examples given below.
- the invention therefore relates to a loudspeaker diaphragm 1 characterized in that:
- the internal face 7 is covered or not with one or more “internal folds” 8 of woven or nonwoven fibers impregnated with resin, forming a laminate or “internal skin” 9.
- composition of the “external” laminate in particular the number and nature of the “external” folds, is variable depending on the characteristics sought.
- the woven or nonwoven fibers forming the internal and external folds will be chosen from:
- the foam constituting the “structural” type of core is chosen from the following:
- the impregnation resin is chosen from the following:
- thermosetting resins epoxy, polyester, vinylester and phenolic
- thermoplastic resins polyamide, polypropylene
- This sandwich material is polymerized either by compression between mold and against mold, or by vacuum molding, at a suitable temperature for allow polymerization of the resin and thus obtain a mechanically homogeneous structure.
- the invention also relates to this method.
- the current method allows the production of membranes for bass and medium transducers with diameters ranging from 46 cm to 10 cm.
- the thicknesses of the internal and external folds are declined by slicing the material in various thicknesses ranging from 1.5 mm to 4 mm.
- the CWS - 1 P / M3 structure (figures 5A / 5B) has a core one and a half times thicker than the CWS-1 P / M2 structure (figures 4A / 4B): its rigidity is increased and the damping is improved. It will be noted that the mass is little affected since the efficiency of the transducer remains identical. This solution is particularly well suited for “piston” operation in the bass.
- the rigidity is similar, the thinner core (CWS - 2P / M1, 5 figures 6A / 6 B) covered with two external folds presents a better impulse, on the other hand the structure CWS-1 P / M3 (figures 7A / 7B) has superior damping, with a thicker core.
- the latter without internal skin, offers a better controlled impulse and damping. It is a particularly suitable choice for the medium.
- the best embodiment to date, and the most common version for a medium HP, consists of a core 1.5 mm thick with an outer skin of 100 microns made from two plies of glass. 50 microns.
- the thickness of the core is 3 mm with an internal skin of 3 plies of 50 microns and an external skin of two plies of 50 microns.
- the invention also covers loudspeakers for loudspeakers, comprising a membrane according to the invention.
- the invention also covers loudspeakers fitted with at least one loudspeaker comprising a membrane according to the invention.
- the invention finally covers all the applications of these membranes, loudspeakers and loudspeakers, for the reproduction of sounds, in particular in high or very high fidelity, for all private uses, in theaters, conferences, concert halls, automobiles and other land transport vehicles, sea and air transport vehicles, and the like.
- the invention also covers all the embodiments and all the applications which will be directly accessible to those skilled in the art on reading the present application, their own knowledge, and possibly simple routine tests.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Manufacturing & Machinery (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Laminated Bodies (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0304420A FR2853803B1 (fr) | 2003-04-09 | 2003-04-09 | Membrane pour haut-parleur d'enceinte acoustique haute fidelite, multicouches, multimateriaux |
PCT/FR2004/000642 WO2004095882A1 (fr) | 2003-04-09 | 2004-03-16 | Membranes pour haut-parleur d’enceinte acoustique haute fidelite, multicouches, multimateriaux |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1616457A1 true EP1616457A1 (de) | 2006-01-18 |
Family
ID=33041746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04720899A Withdrawn EP1616457A1 (de) | 2003-04-09 | 2004-03-16 | Membran aus mehreren lagen verschiedener materialien für einen lautsprecher einer hifi lautsprecherbox |
Country Status (10)
Country | Link |
---|---|
US (2) | US20060222201A1 (de) |
EP (1) | EP1616457A1 (de) |
JP (1) | JP2006523053A (de) |
KR (1) | KR20060008875A (de) |
CN (1) | CN1771756A (de) |
AU (1) | AU2004231965A1 (de) |
CA (1) | CA2521785A1 (de) |
FR (1) | FR2853803B1 (de) |
RU (1) | RU2005134664A (de) |
WO (1) | WO2004095882A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103467876A (zh) * | 2013-10-08 | 2013-12-25 | 苏州新区华士达工程塑胶有限公司 | 具有绝缘功能的塑胶配方 |
DE102013225665A1 (de) * | 2013-12-11 | 2015-06-18 | Tesa Se | Mehrschicht-Laminat mit hoher innerer Dämpfung |
GB2534859B (en) * | 2015-01-30 | 2020-06-10 | B&W Group Ltd | Diaphragm for a loudspeaker drive unit or a microphone |
CN104703100A (zh) * | 2015-03-11 | 2015-06-10 | 歌尔声学股份有限公司 | 一种振膜以及一种扬声器装置 |
CN109005487B (zh) * | 2018-06-15 | 2020-03-24 | 歌尔股份有限公司 | 扬声器振膜以及扬声器 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57132500A (en) * | 1981-02-10 | 1982-08-16 | Sanyo Electric Co Ltd | Manufacture for diaphragm plate for speaker |
NL8200690A (nl) * | 1982-02-22 | 1983-09-16 | Philips Nv | Luidsprekermembraan bevattende een laag van polymethacrylimideschuim. |
JPS6119298A (ja) * | 1984-07-05 | 1986-01-28 | Sansui Electric Co | スピ−カ用振動板 |
GB8514189D0 (en) * | 1985-06-05 | 1985-07-10 | Reefgrade Ltd | Electro-mechanical transducer diaphragm |
JPH05316591A (ja) * | 1992-05-12 | 1993-11-26 | Onkyo Corp | スピーカ用エッジ及びその製造方法 |
FR2731579A3 (fr) * | 1995-03-10 | 1996-09-13 | Focal | Procede de fabrication d'une membrane pour haut-parleurs et membrane obtenue |
US6378649B1 (en) * | 1999-03-03 | 2002-04-30 | Onkyo Corporation | Speaker member and manufacturing method thereof |
DE19925787C1 (de) * | 1999-06-05 | 2000-12-21 | Roehm Gmbh | Verfahren zur Herstellung von Membranen für elektroakustische Wandler sowie Membranen |
DE10135414C1 (de) * | 2001-07-25 | 2003-03-13 | Roehm Gmbh | Herstellung nicht-flacher Membranen für elektroakustische Wandler |
US7010143B2 (en) * | 2002-08-22 | 2006-03-07 | Tai-Yan Kam | Rectangular panel-form loudspeaker and its radiating panel |
US6929091B2 (en) * | 2002-10-28 | 2005-08-16 | Sound Advance Systems, Inc. | Planar diaphragm loudspeaker and related methods |
-
2003
- 2003-04-09 FR FR0304420A patent/FR2853803B1/fr not_active Expired - Lifetime
-
2004
- 2004-03-16 WO PCT/FR2004/000642 patent/WO2004095882A1/fr active Application Filing
- 2004-03-16 RU RU2005134664/28A patent/RU2005134664A/ru not_active Application Discontinuation
- 2004-03-16 AU AU2004231965A patent/AU2004231965A1/en not_active Abandoned
- 2004-03-16 CA CA002521785A patent/CA2521785A1/fr not_active Abandoned
- 2004-03-16 JP JP2006505732A patent/JP2006523053A/ja active Pending
- 2004-03-16 KR KR1020057019201A patent/KR20060008875A/ko not_active Application Discontinuation
- 2004-03-16 CN CNA2004800095222A patent/CN1771756A/zh active Pending
- 2004-03-16 US US10/551,955 patent/US20060222201A1/en not_active Abandoned
- 2004-03-16 EP EP04720899A patent/EP1616457A1/de not_active Withdrawn
-
2008
- 2008-06-26 US US12/146,902 patent/US20090060255A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2004095882A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20060222201A1 (en) | 2006-10-05 |
RU2005134664A (ru) | 2007-05-27 |
CA2521785A1 (fr) | 2004-11-04 |
KR20060008875A (ko) | 2006-01-27 |
CN1771756A (zh) | 2006-05-10 |
FR2853803A1 (fr) | 2004-10-15 |
US20090060255A1 (en) | 2009-03-05 |
FR2853803B1 (fr) | 2005-06-03 |
JP2006523053A (ja) | 2006-10-05 |
AU2004231965A1 (en) | 2004-11-04 |
WO2004095882A1 (fr) | 2004-11-04 |
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