EP1182642B1 - Structure composite avec des fibres pour une table d'harmonie - Google Patents

Structure composite avec des fibres pour une table d'harmonie Download PDF

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Publication number
EP1182642B1
EP1182642B1 EP01119532A EP01119532A EP1182642B1 EP 1182642 B1 EP1182642 B1 EP 1182642B1 EP 01119532 A EP01119532 A EP 01119532A EP 01119532 A EP01119532 A EP 01119532A EP 1182642 B1 EP1182642 B1 EP 1182642B1
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EP
European Patent Office
Prior art keywords
fiber
core plate
soundboard
fibre
coating
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.)
Expired - Lifetime
Application number
EP01119532A
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German (de)
English (en)
Other versions
EP1182642A3 (fr
EP1182642A2 (fr
Inventor
Martin Schleske
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SCHLESKE, MARTIN
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Individual
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Filing date
Publication date
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Publication of EP1182642A2 publication Critical patent/EP1182642A2/fr
Publication of EP1182642A3 publication Critical patent/EP1182642A3/fr
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Publication of EP1182642B1 publication Critical patent/EP1182642B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
    • G10C3/00—Details or accessories
    • G10C3/06—Resonating means, e.g. soundboards or resonant strings; Fastenings thereof
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
    • G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
    • G10D3/02—Resonating means, horns or diaphragms
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
    • G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
    • G10D3/22—Material for manufacturing stringed musical instruments; Treatment of the material

Definitions

  • the invention relates to a resonance panel in fiber composite construction, containing at least one of long fibers and carrier material existing fiber coating, for use for an acoustic Music instrument, in particular a stringed instrument.
  • the invention is also applicable to others having a resonant body or soundboard provided acoustic musical instruments (such as Guitars and pianos) can be used to advantage.
  • structures in fiber composite construction usually consist of long fibers, preferably oriented in certain directions, and a carrier or matrix material, which is generally a duroplastic or thermoplastic is.
  • the invention is an epoxy resin system.
  • the invention is therefore the object of a resonance plate to create in fiber composite construction, compared to excellent, in traditional construction manufactured solid wood resonance panels a significantly improved acoustic quality has.
  • the resonance plate according to the invention is intended in particular Maintaining the familiar and desired timbre of a Solid wood resonance panel a much higher sound power exhibit.
  • the invention is based on the following considerations and To attempt:
  • the cause of the sound radiation of the instrument are its natural vibrations.
  • the frequencies and vibration modes of the natural vibrations decisively determine the timbre of the instrument.
  • the formation of the natural vibrations is in turn dependent on certain material properties, among which the anisotropy of the wood has an outstanding importance.
  • Anisotropy is the directional dependence of the physical properties of a material.
  • the anisotropy of the speed of sound of the longitudinal waves ie the ratio of the speed of sound in the longitudinal direction to the speed of sound in the transverse direction of the fiber path, is about 4: 1 in spruce wood and is therefore very pronounced.
  • the speed of sound in the direction of the fiber which is about four times greater than the speed of sound transverse to the fiber, is due to the higher longitudinal stiffness of the spruce wood.
  • the high stiffness in the fiber longitudinal direction also appears useful due to the large forces occurring in this direction (due to the string tension).
  • the conventional string instrument shows a very good agreement of the anisotropy of the speed of sound with the technical outline contours (length to width), which are also in the order of 4: 1.
  • Cibration level of the natural vibrations Decisive for the sound radiation of the instrument are the Vibration level of the natural vibrations. They depend on the vibrating mass of the soundboard, its acoustic significance resulting from the following relationship:
  • the vibration resistance (so-called impedance), which the resonance plate of the through Produced string vibrations, opposing stimulating alternating force, is the larger, the higher the vibrating mass of the resonance plate is.
  • To high vibration speeds (so-called. Fast) the Resonance plate and thus the most effective sound radiation to achieve the instrument is, given a stimulus lowest possible vibration resistance and thus one possible low oscillating mass required.
  • the invention therefore proceeds a fundamentally different way to reduce the anisotropy of the Fiber composite construction produced resonant plate in the to realize the required manner.
  • the formulated in the feature of claim 1 condition of a single-layer and at the same time multidirectional fiber coating defines a Fasergelege that changes its fiber direction in a single layer.
  • the fibers of individual fiber groups have - according to claim 4 - a similar direction, so are "combed” oriented. It is therefore not a random fiber layer in which the fibers are also arranged in a multi-directional manner; whereas, however, in the case of the random fiber coating, the individual fibers are mixed, ie randomly arranged, in the fiber coating according to the invention, the individual fibers form fiber-grouped, linear fiber patterns through the "combed” arrangement. This is exemplified in FIGS. 1 to 3.
  • the term “single-ply” does not exclude that individual fibers can overlap to some extent due to their small cross-section within the matrix system in which they are embedded. Such fiber overlays of a single-layer fiber coating can usually not be avoided, even when prepregs are used, because the fibers always have a certain freedom of movement during the liquefaction phase of the matrix system until it finally hardens. Rather, the term “single-ply” defines that a multilayer structure is provided, as it is given in the conventional, cross and / or layered structure by a plurality of superimposed fiber coatings or fiber fabric.
  • the resonator plate according to the invention thus makes it possible to use instruments to build that in terms of listening habits (Klangmaschineempfinden) the conventional, made of solid wood Instruments, but with regard to their acoustic characteristics Efficiency far superior to traditional instruments are.
  • a preparation of the fiber coating according to claims 1 to 8 can basically be done by different methods.
  • a Possibility is given by hand laminating the core plate. Although this method requires only a small investment But it is time consuming and less reproducible than others Method.
  • a so-called prepreg (English: pre-impregnated fibers) introduces i.d.R. thermoplastic or Thermosetting carrier material (matrix) preimpregnated semi-finished product It offers the advantage that the very complex impregnation process the fibers with the matrix resin from the actual coating of the Core plate is carried out separately. This one for the quality and the property profile of the later fiber composite material very important process is controlled on a prepreg plant under and reproducible conditions [s.
  • a thin solid wood layer (preferably of spruce or maple wood) occupying the entire surface of the resonator plate is preferably applied to both sides of the core plate in order to additionally increase the overall bending strength of the plate in the non-fiber composite plate regions. Since the fiber coating, especially in the preferred use of carbon fibers, has a very high density, is saved by the feature of the partial coating according to claims 5 and 9 oscillating mass to a considerable extent and thus significantly increases the sound radiation of the inventive resonance plate.
  • the Multidirectional fiber coating in said, statically strong loaded partial areas to perform multiple layers.
  • the Associated (although unwanted) increase in the oscillating mass is due to the Feature of only partial fiber composite coating of Core plate 1 compensated.
  • the direction changes 6 of the fibers 2 of the multidirectional Fiber course are shown in Fig. 1 to 3. These Directional changes may be abrupt, as seen in FIG. This is the case when the fiber coating according to claim 5 the shape of individual strips 3 or separated from each other Zones 4 has. In subregions 5 is the fiber coating recessed by - according to claim 5 - only on at least one Part of the core plate 1, the fiber coating 2 is provided. Fiber properties, such as yarn count or yarn thickness, are according to Claim 6 on the total surface of the fiber coating different (cf., in Fig.1a denoted by 7 different fibers of two zones).
  • Fig. 1a represents a surface segment of Fiber coating according to the invention, which consists of many individual, separated, "patchwork-like" on the core plate applied (in the example shown unidirectional) zones 4 consists. Although the individual zones have one by themselves unidirectional fiber flow. Regarding a common Reference axis, however, take the zones 4 fiber longitudinal directions different angles. This is in the totality of Fiber coating a multidirectional, single-layered Fiber coating realized.
  • Fig. 1b shows - the example of a Embodiment of the invention for use for Stringed Instruments - the realization of the single-layer, multidirectional fiber coating by individual (im illustrated embodiment unidirectional) different Oriented strips 3, which depending on the position with L1 to L6 are designated and occupy larger portions of the total area.
  • L1, L3 and L5 solid lines
  • L2, L4 and L6 dashed lines
  • the Bottom the fiber shape of the Top off the grain of the underside.
  • a Stiffening in the transverse direction is achieved here in the middle part and although not by the conventional, crosswise layer structure several laminates, but by the deviation between the Fiber course on the top and the bottom of the Core plate 1.
  • the top and bottom of the core plate are in all Always provide areas only with a single-layer fiber coating.
  • Zones 4 are production-technical overlaps allowed and intended.
  • the preferred embodiment has no abrupt, but as in FIGS. 2 and 3 show continuous direction changes 6. Both in this case, and in the case of the illustrated in Fig. 1 abrupt changes in fiber direction, the fiber regions are "combed” oriented, the individual fibers thus form common fiber patterns.
  • the Fiber coating different fiber shares per unit area on, as in Fig. 3 by areas 8 of increased fiber density (Fiber content per unit area) and areas 9 reduced Fiber density is illustrated. This allows mass coating (mass per unit area) as well as strength properties Loading directions and natural modes of the resonance plate be better adapted than at a constant fiber density.
  • the multiple change in direction of the fibers creates a "shut-off" effect such that a stiffening portion of the fiber coating is also achieved transversely to the longitudinal direction of the resonance plate.
  • This "blocking effect” which is illustrated in FIG. 3 at a point by way of the fiber course deviating from the longitudinal direction (direction of the line 11) of the resonance plate (direction of the line 10), is provided in the preferred embodiment of the resonance plate.
  • the transverse stiffness of the resonance plate is selectively increased in some areas.

Claims (9)

  1. Plaque de résonance avec une structure composite renforcée par fibres pour instruments musicaux acoustiques, en particulier à utiliser comme au moins une des deux plaques de résonance de la caisse de résonance d'instruments à cordes, consistant en une plaque centrale (1) et un revêtement de fibres (2) prévu au moins sur une des deux faces extérieures de la plaque centrale, en fibres longues, qui sont piégées dans un matériau support, caractérisée en ce que le revêtement de fibres (2) est monocouche et en même temps, multidirectionnel.
  2. Plaque de résonance selon la revendication 1, caractérisée en ce que dans au moins un revêtement de fibres, la quantité de fibres par unité de surface est distribuée différemment sur toute la surface.
  3. Plaque de résonance selon la revendication 1, caractérisée en ce qu'au moins une partie des fibres présente des modifications de direction (6).
  4. Plaque de résonance selon la revendication 1, caractérisée en ce que les fibres de chaque groupe de fibres présentent une même direction.
  5. Plaque de résonance selon la revendication 1, caractérisée en ce que le revêtement de fibres (2) est prévu seulement sur au moins une zone partielle d'au moins une face extérieure de la plaque centrale, où le revêtement de fibres (2) se présente de préférence sous la forme de rayures individuelles (3) ou de zones (4) individuelles séparées les unes des autres.
  6. Plaque de résonance selon la revendication 1, caractérisée en ce que les propriétés des fibres, comme la finesse de brin ou l'épaisseur de brin, sont différentes sur toute la surface du revêtement de fibres (7).
  7. Plaque de résonance selon la revendication 1, caractérisée en ce que le développement des fibres du revêtement de fibres (2) sur la face supérieure de la plaque centrale (1) se différencie du développement des fibres sur la face inférieure de la plaque centrale (1).
  8. Plaque de résonance selon la revendication 1, caractérisée en ce qu'en plus du revêtement de fibres, est prévu sur au moins une zone partielle de toute la surface de la plaque de résonance, une couche fine d'amortissement (12).
  9. Plaque de résonance avec structure composite renforcée par fibres pour instruments de musique acoustiques, en particulier à utiliser comme au moins une des deux plaques de résonance de la caisse de résonance d'instruments à cordes, consistant en une plaque centrale (1) et un revêtement de fibres (2) prévu dans la zone d'au moins une des deux faces extérieures de la plaque centrale, en fibres longues, qui sont piégées dans un matériau support, caractérisée en ce que le revêtement de fibres est multidirectionnel et en même temps, seulement sur au moins une zone partielle d'au moins une face extérieure de la plaque centrale (1), où le revêtement de fibres (2) présente de préférence, la forme de rayures individuelles (3) ou de zones individuelles (4) séparées les unes des autres.
EP01119532A 2000-08-23 2001-08-14 Structure composite avec des fibres pour une table d'harmonie Expired - Lifetime EP1182642B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10041357 2000-08-23
DE10041357 2000-08-23

Publications (3)

Publication Number Publication Date
EP1182642A2 EP1182642A2 (fr) 2002-02-27
EP1182642A3 EP1182642A3 (fr) 2003-11-26
EP1182642B1 true EP1182642B1 (fr) 2005-11-09

Family

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EP01119532A Expired - Lifetime EP1182642B1 (fr) 2000-08-23 2001-08-14 Structure composite avec des fibres pour une table d'harmonie
EP01119531A Expired - Lifetime EP1182641B1 (fr) 2000-08-23 2001-08-14 Structure composite avec des fibres pour une table d'harmonie

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP01119531A Expired - Lifetime EP1182641B1 (fr) 2000-08-23 2001-08-14 Structure composite avec des fibres pour une table d'harmonie

Country Status (4)

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US (3) US6610915B2 (fr)
EP (2) EP1182642B1 (fr)
AT (2) ATE309596T1 (fr)
DE (3) DE50107961D1 (fr)

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US6777601B1 (en) * 2003-04-28 2004-08-17 Gregory L. Kerfoot Stringed musical instrument soundboard system
US7276868B2 (en) * 2004-03-29 2007-10-02 Allred Iii Jimmie B Carbon-fiber laminate musical instrument sound board
DE102004041011A1 (de) 2004-08-24 2006-03-02 Martin Schleske Resonanzplatte in Faserverbund-Bauweise für akustische Musikinstrumente
DE102004041010A1 (de) * 2004-08-24 2006-03-02 Martin Schleske Resonanzplatte in Faserverbund-Bauweise für akustische Saiteninstrumente
WO2006024210A1 (fr) * 2004-09-01 2006-03-09 Guobao Wang Violon a integrite structurale
DE102005027424A1 (de) * 2005-06-14 2006-12-28 Martin Schleske Verfahren zur Verbesserung der akustischen Eigenschaften von Klangholz für Musikinstrumente
US7342161B1 (en) * 2005-08-05 2008-03-11 Charles Edward Fox Tonally improved hollow body stringed instrument
US20070084335A1 (en) * 2005-10-14 2007-04-19 Silzel John W Musical instrument with bone conduction monitor
DE102006058849A1 (de) * 2006-12-13 2008-06-19 Martin Schleske Verfahren zur Verbesserung der akustischen Eigenschaften von Fichtenklangholz für Musikinstrumente
US7795513B2 (en) * 2007-01-03 2010-09-14 Luttwak Joseph E Stringed musical instruments, and methods of making the same
US7763784B2 (en) * 2007-01-03 2010-07-27 Luttwak Joseph E Stringed musical instruments and methods of making thereof
US20080202309A1 (en) * 2007-02-22 2008-08-28 Wiswell John R Musical instrument and method of construction therefor
CN101393551B (zh) * 2007-09-17 2011-03-23 鸿富锦精密工业（深圳）有限公司 专利全文检索的索引建立系统及方法
US7595442B2 (en) * 2007-09-27 2009-09-29 Thomas Elgin Grover Ergonomic drumstick
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CN102097087A (zh) * 2010-07-08 2011-06-15 赵振伟 一种古筝音板
CN102486919A (zh) * 2010-12-01 2012-06-06 侯凌云 提琴的声学构型
WO2012082932A2 (fr) * 2010-12-15 2012-06-21 Jesse Savage Tables d'harmonie et procédés de fabrication de matériaux de tables d'harmonie
CN103314406A (zh) * 2010-12-28 2013-09-18 安德里亚斯·赫林格 改善弦乐器声音品质的元件
US8450587B2 (en) * 2011-08-16 2013-05-28 Mcp Ip, Llc Bracing system for stringed instrument
CN104541322A (zh) * 2012-04-16 2015-04-22 尼古拉斯·约瑟夫·肖帕 钢琴板组件和制造该钢琴板组件的方法
US9208756B2 (en) 2013-04-22 2015-12-08 Troy Isaac Musical instrument with aggregate shell and foam filled core
CN103268761B (zh) * 2013-05-08 2015-07-29 天津华韵乐器有限公司 一种短碳纤维增强树脂基复合材料琴箱手风琴
CN203465930U (zh) * 2013-09-03 2014-03-05 肯豁贸易有限公司 声弦乐器音箱板结构
JP6146258B2 (ja) * 2013-10-22 2017-06-14 ヤマハ株式会社 弦楽器用板材の製造方法
JP6156053B2 (ja) * 2013-10-22 2017-07-05 ヤマハ株式会社 弦楽器用板材の製造方法
KR20170118694A (ko) * 2014-12-09 2017-10-25 에어로3 기타스 전기 기타
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Also Published As

Publication number Publication date
US20020069743A1 (en) 2002-06-13
EP1182642A3 (fr) 2003-11-26
US20020066354A1 (en) 2002-06-06
DE50107961D1 (de) 2005-12-15
US6770804B2 (en) 2004-08-03
EP1182641A2 (fr) 2002-02-27
EP1182641A3 (fr) 2003-09-10
US6610915B2 (en) 2003-08-26
US20020066353A1 (en) 2002-06-06
EP1182641B1 (fr) 2005-11-09
EP1182642A2 (fr) 2002-02-27
DE20113495U1 (de) 2001-10-31
US6737568B2 (en) 2004-05-18
DE50107960D1 (de) 2005-12-15
ATE309596T1 (de) 2005-11-15
ATE309597T1 (de) 2005-11-15

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