WO1992013333A1 - Zither with a hot formed steamed wood rib - Google Patents
Zither with a hot formed steamed wood rib Download PDFInfo
- Publication number
- WO1992013333A1 WO1992013333A1 PCT/FR1992/000053 FR9200053W WO9213333A1 WO 1992013333 A1 WO1992013333 A1 WO 1992013333A1 FR 9200053 W FR9200053 W FR 9200053W WO 9213333 A1 WO9213333 A1 WO 9213333A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- belt
- soundboard
- zither
- decompression
- wood
- Prior art date
Links
Classifications
-
- 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
- G10D1/00—General design of stringed musical instruments
- G10D1/12—Zithers, e.g. autoharps
-
- 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
Definitions
- the present invention relates to the field of stringed musical instruments having a wooden sound box.
- a zither comprising a plurality of strings and a sound box, said sound box having an internal cavity delimited by a wooden belt, a lower soundboard provided on one side of said belt, and a table of 'upper harmony provided on the other side of said belt, said upper soundboard having at least one hearing, said strings being arranged on said upper soundboard on the side opposite to said sound box and being spaced from said table of superior harmony by at least one bridge.
- the modification of the ambient air pressure, which results in our eardrum by the sound and musical phenomenon therefore occurs by means of the lower soundboard.
- the latter is made of ten ⁇ r ⁇ wood, and it must have both elasticity characteristics obvious and a physiology based on a regularity of linear and hollow fibers.
- This lower soundboard is tensioned by means of a rigid belt and reinforcement bars intended to compensate for the deformations caused on the belt by the tension of all the strings.
- the soundboard is the vibrating part of the sound box.
- the latter aims to create a zone of high and dynamic sound pressure by means of the vibration of the soundboard.
- the lower soundboard creates the pressure of the air in the sound box and the depression is carried outwards by means of the sound.
- the belt of the resonance box is generally produced by assembling or gluing several elements, and its internal profile is based on rigorous geometric shapes based on straight lines, or is deduced intuitively or rationally from the curves known for their propagative characteristics.
- the construction method of this belt leads to distortions in the sounds emitted by the vibrating strings.
- the vibrating cord carries with it the materials used in the manufacture of the instrument and causes inside the body of air movements called "stationary onoes".
- the inherent vibration of these materials colors the initial sound obtained by the vibration of the horn, and deteriorates the timbre of the instrument by reinforcing, in the sound spectrum, the propagation of certain harmonic frequencies.
- increasing the amplitude of certain harmonics can favor the "barrel” or “acid” effect of the timbre of the instrument.
- the object of the present invention is to provide a zither of the type mentioned above in which the importance of the standing waves is greatly reduced and in the lauuplement the sound amplitude of the chord sound emitted is greatly increased.
- the invention achieves its object by the fact that the belt is produced by hot bending of a piece of steamed wood. cut so that the wood fibers are substantially parallel to the inner periphery of said belt. Steaming, intensive drying, twisting, compression of wood fibers and tensioning are all determining factors to increase the natural frequency of resonance of the belt. The wavelength obtained is thus shorter and easier to treat acoustically. In addition, the propagation of vibrations through the belt is not slowed down by bonding or assembling wooden elements with counter-wires.
- the inner contour of said belt has a profile established from three development curves of exponential nature, said curves acting in different frequency domains.
- FIG. 1 shows a top view of the zither ⁇ e of the invention
- the Figure 2 is a section along line II II ⁇ e l ⁇ Figure 1
- Figure 3 is a horizontal section of the zither according to line III III of Figure 2
- Figure 4 shows the part intended to form the belt of the zither.
- the drawing shows a zither 1 comprising a plurality of substantially parallel cords 2, arranged in a plane above a wooden resonance box 3.
- the ⁇ e resonance box 3 has an internal cavity 4 delimited by a belt 5 having the shape of a ring on either side of which are fixed a lower soundboard 6 and an upper soundboard 7, and comprises plus the legs 8 arranged under the lower soundboard 6 and intended to support the zither 1 on a support table 9.
- the internal cavity 4 is divided into a main chamber 10 and a decompression chamber 11 by an additional part in wood 12 disposed under the upper soundboard 7.
- a passage 13 is provided between the complementary part 12 and the lower soundboard 6 to connect the main chamber 10 and the decompression chamber 11.
- the main chamber 10 is er communication with the outside through a main opening 14 ⁇ e substantially round shape and located near the center ⁇ e the upper soundboard 7.
- the decompression chamber 11 is also Lement in communication with the outside by means of an ⁇ decompression opening 15 provided in the upper soundboard 7 in the vicinity of the belt 5.
- the main chamber 10 occupies most of the internal cavity 4 and constitutes the sounding board musical proper.
- the strings 2 are arranged above the upper soundboard 7 and are separated from the latter by a bridge 16 fixed on the wood of the instrument and by a floating bridge 17 connected to the lower soundboard 6 by bridges 18 crossing openings 19 formed in the upper soundboard 7.
- Each rope 2 is fixed by one end to the belt 5 and by the other end to a dowel 20 making it possible to tension the rope.
- This method of mounting the strings is known from French Patent No. 2,512,994 and will not be further explained in the present specification.
- the upper soundboard 7 and the lower harmony table 6 are made of soft wood, such as spruce or Oregon pine. They have elasticity characteristics and physiology based on a regularity of linear and hollow fibers.
- the belt 5 is made from a piece 21 of steamed wood, preferably beech, which is bent hot.
- the fibers 22 of the wood of the piece 21 extend substantially parallel to the edge 23 of this piece 21, which is intended to form the annular inner wall of the belt 5.
- One end 24 of this piece 21 is cut at a bevel and, after bending, it is applied and fixed against the edge 23 of the other end 25. Thanks to this method of construction of the belt 5, the fibers 22 are substantially parallel to the internal contour 26 of the belt 5.
- Attachment 12 is also formed i n steamed beech and it is shaped so that its fibers 22a espouse the contour 27 of the complementary part 12 which delimits master bedroom 10.
- the complementary part 12 is secured to the ring 5 by any known means.
- its end faces (12a, 12b) can be glued against the inner periphery 26 of the belt 5.
- the periphery of the main chamber 10 has a convex profile formed by three curves C1, C2, C3 having exponential developments.
- the curve C1 is defined by the profile of the contour 27 of the complementary part 12.
- the other two curves C2 and C3 are formed by the contour 26 of the belt 5 ⁇ u-- delimits the main chamber 10.
- the curve C2 extends between the points referenced 28 and 29 in FIG. 3, and the curve C3 extends between the points referenced 29 and 30.
- the curves C1, C2 and C3 each act in different frequency domains, which allows the main chamber 10 to propagate the sound waves consecutive to the vibration of a string according to a distribution which approaches a linear curve whatever the frequency.
- the curve Cl promotes the repercussion of the amplitude modulations of the bridge 16.
- the curve C3 promotes the repercussion of the amplitude modulations of the floating bridge 18, and the curve C2 allows a laminar decompression, towards the decompression hearing 15, at the frequencies having the greatest wavelength, and this in phase tuned with main hearing 14.
- the belt 5 is made of steamed beechwood and hot bent, its natural frequency ⁇ e resonance is higher, this ⁇ i-i promotes the acoustic treatment of the standing waves emitted by the natural frequencies of the belt.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP92905090A EP0568630B1 (en) | 1991-01-24 | 1992-01-22 | Zither with a hot formed steamed wood rib |
JP4504674A JPH06505346A (en) | 1991-01-24 | 1992-01-22 | A zither with a heat-bent wooden body. |
DE69201950T DE69201950T2 (en) | 1991-01-24 | 1992-01-22 | ZITHER WITH OUTLINE OF DAMPED WOOD, MOLDED AT HIGH TEMPERATURE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR91/00813 | 1991-01-24 | ||
FR9100813A FR2672148B1 (en) | 1991-01-24 | 1991-01-24 | CITHARE PROVIDED WITH AN OVEN WOODED BELT, HOT HANGER. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992013333A1 true WO1992013333A1 (en) | 1992-08-06 |
Family
ID=9409019
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1992/000053 WO1992013333A1 (en) | 1991-01-24 | 1992-01-22 | Zither with a hot formed steamed wood rib |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0568630B1 (en) |
JP (1) | JPH06505346A (en) |
AT (1) | ATE120872T1 (en) |
DE (1) | DE69201950T2 (en) |
FR (1) | FR2672148B1 (en) |
WO (1) | WO1992013333A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0195481A2 (en) * | 1985-03-18 | 1986-09-24 | Richard Beck | String and bow musical instrument and method for manufacturing sounding boards |
WO1988007251A1 (en) * | 1987-03-07 | 1988-09-22 | Joseph Harold Stephens | Improvements in or relating to violins |
FR2512994B1 (en) * | 1981-08-06 | 1989-11-17 | Murray Martial | CHROMATIC AND POLYHARMONIC CITHAR, WITH LAMINAR DECOMPRESSION AND FLOATING HORSE |
-
1991
- 1991-01-24 FR FR9100813A patent/FR2672148B1/en not_active Expired - Fee Related
-
1992
- 1992-01-22 DE DE69201950T patent/DE69201950T2/en not_active Expired - Fee Related
- 1992-01-22 EP EP92905090A patent/EP0568630B1/en not_active Expired - Lifetime
- 1992-01-22 AT AT92905090T patent/ATE120872T1/en not_active IP Right Cessation
- 1992-01-22 WO PCT/FR1992/000053 patent/WO1992013333A1/en active IP Right Grant
- 1992-01-22 JP JP4504674A patent/JPH06505346A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2512994B1 (en) * | 1981-08-06 | 1989-11-17 | Murray Martial | CHROMATIC AND POLYHARMONIC CITHAR, WITH LAMINAR DECOMPRESSION AND FLOATING HORSE |
EP0195481A2 (en) * | 1985-03-18 | 1986-09-24 | Richard Beck | String and bow musical instrument and method for manufacturing sounding boards |
WO1988007251A1 (en) * | 1987-03-07 | 1988-09-22 | Joseph Harold Stephens | Improvements in or relating to violins |
Also Published As
Publication number | Publication date |
---|---|
FR2672148A1 (en) | 1992-07-31 |
DE69201950T2 (en) | 1995-11-16 |
EP0568630B1 (en) | 1995-04-05 |
EP0568630A1 (en) | 1993-11-10 |
JPH06505346A (en) | 1994-06-16 |
ATE120872T1 (en) | 1995-04-15 |
FR2672148B1 (en) | 1995-06-16 |
DE69201950D1 (en) | 1995-05-11 |
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