JP2009163204A - Ultimate piece vibration transmission acceleration system rim structure 4 in frictional stringed instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To establish a new piece vibration transmission path from a piece leg bottom to a rear plate side by connection to a power tree B group of a rear side, when two pieces pair posts are set in a frictional stringed instrument made of wood. <P>SOLUTION: By making " pre-attach" of the post toward a small rim side from a piece leg bottom position of a high sound string as a reference, and "post-attach" of the post toward a large rim side from an original post position, a bottom edge of a main post BC which is set on either of two places is connected in a convex form to a high B rear section arranged in a rear plate side, and a bottom edge of a post C in the specified range is connected in a plane form to the corresponding position of a plane of the rear plate side, in " two pieces one pair post". The power tree B (high B of a high string side, middle B of a center and low B of a low string side) is a member which sets in a vertical direction in the rim of rear plate side in a rim constriction section, by a semi-convex power tree sticking method. A connection member H is a member for connecting right to " the pre-attach position", for connecting the power trees B. A structure of a whole convex section of the rear plate side is named " power tree B group". <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The vibration on the front panel transmitted from the wooden bowed instrument piece is the "two-pair soul pillar" installed in the trunk before and after the treble string side piece base and the "Rikigi B group" on the back board side. The present invention relates to an in-body structure for the purpose of establishing a new piece vibration transmission path to the entire vibrating body according to the connection method.

The vibration transmission path of the wooden bowed instrument with the conventional structure is the connection part between the “top and torso face plate” and “棹 and torso”, and the soul column C in the torso side of the torso side slightly from the treble string side piece leg bottom position. In addition,
(1) “Princess Pillar with Bowed Instrument” (Application Number) Japanese Patent Application No. 2002-33497 (Draft Soul Pillar) (Registration Number) Patent No. 3840594 (Registration Date) August 18, 2006 The above is divided into “possible / subtle” confirmation of the effect, etc., because the bottom of the soul pillar is directly connected to the back plate plane, or because of the experiment with the plate plan ((3), 0021, FIG. 16 below) (2) (Application Number) Japanese Patent Application No. 2007-133474 (Draft Soul Column) (Title of Invention) (1) Cut the bottom part of the top of the soul column directly into a "U" shape, and insert it into this recess with the relevant part of the inner edge of the high-pitched chord side f-hole and the back surface of the nearest front plate as the contact point. The pillar plan (2) is an improvement plan of “(1) + surface plate near the inner edge of the f hole = 3 contacts”, and the vibration on the surface plate side is “normal 1 in-body soul column contact”. <2 points of <1><3 points of <2 >> It has been experimented to increase the sensitivity in the order of connection, and based on this, the soul pillar used near the inner edge of the f hole of the present invention is at the top The main pillar plan (2) with the most contact points is the best,
Therefore, in the present invention, the main soul pillar BC bottom side is connected to the high B back portion, the high B bottom portion is fitted into the groove m (groove wall / groove bottom), and the main contact area is increased with the back plate side. , “Propulsion promotion plan for the heel side vibration, the same name proposals (3) to (5)” (3) (Application number) Japanese Patent Application No. 2005-128593 (Draft vibration transmission rod plan) (Title of invention) Complete in a bowed instrument Vibration transmission facilitating in-body structure The above-mentioned plan 2 with the same name has been filed (棹 vibration transmission rod-shaped plan) ▲ 4 ▼ (application number) Japanese Patent Application No. 2006-106897 (draft of vibration transmission force) (title of invention) Full vibration transmission promotion system in-body structure 3 (5) (Application number) Japanese Patent Application No. 2006-317810 (Draft of vibration transmission force) (Title of invention) Full vibration transmission promotion system in-body structure 4 in a bowed instrument (For NO3 amendment proposal, NO4 partial deletion is notified by official authority) "Ultimate piece vibration transmission promotion plan-(6)-(8) of the same name plan" (6) (Application number) Japanese Patent Application No. 2007-104309 (Urban piece vibration transmission ultimate plan) (Title of invention) Ultimate in a bowed instrument In-body structure for frame vibration transmission promotion system (7) (Application number) Japanese Patent Application No. 2007-278161 (Ultimate proposal for frame vibration transmission) (Title of Invention) Ultimate in-body vibration transmission promotion system in-body structure for bowed instruments 2 (8) (Application number) Japanese Patent Application No. 2007-341722 (Urban piece transmission ultimate plan) (Title of invention) Ultimate piece vibration transmission promotion in-body structure 3 in a bowed instrument The present invention is a compilation of the above (3) to (8) self-undisclosed plans, and the use of the above-mentioned (1) (2) open plans.

I Since there are no power trees for promoting vibration transmission in the back side of the traditional wooden bowed instrument, it is necessary to devise ways to actively improve vibration transmission efficiency.
II The performance of this ultimate structure is superior to the plans (3) to (5) above (the vibration transmission plan).
III Self-plan (1) (2) “Picking soul pillar” is based on the fact that it is superior in performance to the main soul pillar BC of the inner soul pillar (Fig. 3) at the upper edge of the contact hole. Aiming to improve the frame vibration transmission efficiency from the front plate side to the back plate side by developing the structure by the new installation method such as “Two pairs of soul pillars” and “Rikigi B group” for increasing the contact area , Etc. are challenges.

  The construction method in which the bottom sides of the three timbers B (high B, medium B, low B) in the semi-convex type timber bonding method are fitted into the groove m on the back plate side is a structure that increases the contact area of both members In addition to this, “Rikigi B group” in which the connecting member H is combined with this, and in addition, between the main soul column BC and the upper and lower diaphragms that connect the bottom of the soul column to the corresponding portion of the high B back portion Establishing a total system as a new piece vibration transmission path from the piece side to the back plate side of the wooden bowed instrument using the installation method of “two-pair soul pillar” by the conventional soul pillar C connected to the flat part, etc. .

When the two pieces of the single plate cylinder violin kit (28,000 yen) and the modified plywood cylinder (plywood), which are the previous prototypes of the present invention, are returned to the conventional structure, the fitting portion of the bottom of the timber B remains ( [0016] (3) The flat-type power wood bonding method described in 0016) is described, and some effects remain, but as a nearly unmodified violin, both are compared with the total system modified product of the present invention. Because all the witnesses have confirmed that it is superior,
It is clear that the prototype of the present invention using the above total system is superior to the performance of a commercially available wooden bowed instrument made of the same material, and the sound quality, particularly the volume, has definitely increased.

If the above is supplemented, the "two-pair soul pillar" is superior to the "single soul pillar" in the conventional soul pillar installation range (Fig. 5, iron rule described later). f If the main soul column BC near the edge of the hole is removed, the “Rikigi B group” on the back plate side is almost irrelevant, almost the current “single soul column” state, the clear volume difference in this experiment is The basis,
By the way, using the instant “two-pair soul pillar” with (0002 ・ ▲ 1 ▼ soul pillar with knob) added to the inner edge of the commercial violin f hole without “Rikiki B group”, the volume increase effect However, the degree of the effect varies depending on the musical instrument to be tested.

In comparison between the new kit of the first embodiment and the modified kit (Fig. 8) that was repaired with a clogged part slightly reduced in the side plate width, the new kit was stronger and the maximum volume of all prototypes. , Initially "hard and intense" sound quality, 30 minutes a day of ramming, since about two months, it has been almost comparable to the following plywood body while maintaining a strong sound, exceeds this by continuing further ramming I feel a sign, and the above comparative instrument is soft because the repair part reduces sensitivity, I feel dissatisfied with the volume, but I like the witness,
The first modified plywood body of the first embodiment in 2004 is the final modified product, which is the closest to the sound heard on the broadcast etc. among all the modified products. It has been confirmed that both have reached the fact that it has reached enough, and during the experiment, "Is this really a veneer body?"
The truth of the above "thing" will become clear if it is after the completion of trial production and sufficient indentation as described in the materials described in the next section.

Two single-plate barrel new and old remodeled violin kits (15,000 yen) and two plywood barrels only for material costs (less than 500 yen), self-flow plate thickness adjustment (Figures 10 to 12) ) Excellent performance in the above-mentioned side plate width repair, even with the above-mentioned instrument owned by the witnesses, it can be said to be “any material” in the prototype,
If it is possible to achieve the performance of “ultra-high-end products” with this structure if it is possible to collaborate with the above-mentioned “total system + plate thickness adjustment by experts”, and further to examine the materials and expel the impact period after production, etc. maybe? The above is based on the performance of the new kit of the first embodiment, and as a conclusion from the self-determination of “high price that is difficult to obtain at the hobby stage for ordinary people”
Using a higher-grade material than this example and combining it with the total system of the present invention should give a decent performance, there is no hit, and the performance of a general luxury product is “within range” "We are very satisfied with the performance of the new kit and declare completion.

The present invention provides a “two-pair soul column” (FIGS. 2 and 3) between the front plate side of the waistband portion and the back plate side having the “Rikiki B group”, the main soul column BC and the soul column. The position of C, etc. and the distance between the three power trees B are related to each other, that is, the position of the main soul column BC is determined from the “front” and “retrofit” of “two pairs of soul columns”. , By placing the high B (hereinafter referred to as middle B / low B) to the position on the back plate side corresponding to directly below the soul column, and connecting the bottom of the soul column to the back of the high B with a convex portion. The bottom of the soul pillar C is a structure that connects the flat part to the back plate side plane,
In the case of the plywood body, even if the inner edge “front” of the f-hole is installed, the soul column is established because the push-up deformation rate of this part due to the soul column is less due to the plywood characteristics. Although it is possible to arrange within a range and at an arbitrary position,
In the single plate cylinder, as a measure to prevent the above deformation, the soul column installation position on the small body side is limited to the inside of the cylinder near the following “front” fixed position, and the “post installation” soul column installation position is in accordance with the following rules. f Installed near the inner edge of the hole, so only the first and second embodiments can be used.
Depending on how the soul pillars are arranged, the string vibration is changed from the piece to the above [Three force wood B and groove m (groove wall / groove bottom) in the front plate, main soul pillar BC, semi-convex type timber bonding method, the connection The above-mentioned new piece vibration transmission path to the back plate side in the order of “whole force group B group including member H etc.” in the order of the conventional soul column C and the side plate portion is the total in the present invention. System structure.

  “Two pairs of soul pillars” have two positions inside the front and rear of the body with respect to the position of the bottom of the treble string side piece base, and the lateral direction from the fixed position to the inside of each treble string side f hole Although the installation range (Fig. 5) is used, when the main soul column BC and the soul column C are installed separately to the determined positions within the above-mentioned soul column installation range, they are arranged in a straight line with the same grain on the front plate side. “Pre-attachment” and “retro-attachment” to the position that avoids the are the rules of the “two-pair soul pillar” arrangement method.

  “Two pairs of soul pillars” is based on the position of the violin's treble string side piece legs, and if the conventional soul pillar C position closer to the torso is set as a “retrofit” fixed position, the distance between both places is 1K. Then, the position closer to the small torso within 2K to 3K from the frame leg reference position is set as a “front” fixed position, and the lateral direction from the fixed position to the inside of each f hole can be installed in the soul column ( 5), the connecting position of the connecting member H is about 2,5K, which is the unit at the “front” position of the soul column, and the soul column used in the immediate vicinity of the hole edge is (FIG. 5). The inner soul column and the immediate soul column of the inner rim of the hole are slightly moved along the inner edge of the in-range f-hole, and the position where the two-sided soul column pushes up the diaphragm with each other is searched for and installed to avoid the flicker phenomenon.

  In addition, the groove M is along the arc of the glue bar E at the left and right corners on the back side of the front plate of the cylinder center constricted part, and in the plywood cylinder, it is a gap part with a thin plate (plate thick part) for reinforcing the back of the frame. , Long and narrow shallow grooves on the left and right sides of the front plate side (within 4 mm in width and depth for one plywood), and with a new single-plate body kit, directly to the relevant location (within 3 mm in width and about 1 mm in depth) In addition to the left and right f holes, the presence of the groove M moderately suppresses vibration transmission to the left and right ends of the back reinforcement part. Because it was intuitive that “the structure is easy to limit to the side,” I personally implemented all the violin prototypes for the experiment.

  For all prototypes of the present invention, the highest grades sold separately were used without using the strings and pieces of the kit, but for the paint, both sides using commercially available varnishes that were familiar without using dedicated luxury products were used. When the soul pillar is pasted on the main soul pillar BC, the upper side is first bonded to the front board side of the soul pillar installation position. When the soul pillar with knob is manually installed on the inner edge of the f hole, the bottom of the soul pillar is securely connected to the high B back part on the back plate side. Providing a protrusion like the bottom of the in-body soul column facilitates the connecting operation of the protrusion to the relevant part of the high B back.

"Preparation of plywood body violin thickness, front and side plates"
Prototype of plywood body violin thickness (front plate 2, 3mm, back plate 3mm, vibration plate edge protrusion omitted, side plate 2, 3mm processed into a double plate), and from the inner surface of the diaphragm The plate thickness adjustment is best in the direction of the solid line of the back side (Figs. 10 and 11),
Specifically, the front plate side trunk longitudinal center and the trunk edge are tri-polymerized plates, and a thin single plate is attached to the trunk central constricted part to reinforce the back of the frame. The double plate with the core plate completely exposed (Fig. 10) except for the above, with the groove M carved in the groove M (width less than 3mm to less than 4mm and depth equal to one plywood). The boundary including the thin plate part for reinforcing the back of the piece was processed gently as shown in (FIGS. 2, 3, and 12).

“Plywood body violin thickness preparation and back plate experiment results”
The back plate side of the plywood body violin is processed in the same way as above, but the left and right ends of the “Rikigi B group” at the center neck of the body are double half plywood. (Fig. 11), and the boundary is processed gently as shown in (Fig. 12), and the upper and lower diaphragms are coated with a thicker coating on both the upper and lower vibration plate parts of the plywood (other than the adhesive surface). There is also an experiment to do, because the volume and sound quality with this manufacturing method was good,
The above self-flow plate thickness adjustment is applied to two single plate cylinder new kits and modified kits as well as two plywood cylinder modified violins. Volume, however, in the modified single-plate body, hot water was poured into the body and the back plate was peeled off each time it was modified, so the side plate width decreased by adjusting the bottom of the diaphragm and adjusting the bottom of the side plate each time. Is the cause of “decreased sensitivity” caused by repairing clogs with a separate member? As a result of a new trial production with a new kit (15,000 yen), the performance of the single-board body modification kit is the best musical instrument in the previous prototype, and the plywood of the first embodiment The modified body has the right side plate width, so the volume and sound quality are satisfactory.

"Installation of back plate Rikiki B and experimental results"
(1) Convex bonding method for directly adhering the power tree B to the back plate side ...
▲ 2 ▼ Semi-convex adhesive method that engraves the groove m on the back plate side and fits the bottom of the power tree ...
▲ 3 ▼ Flat-type reinforced wood bonding method that scrapes off the protruding part of the semi-convex type reinforced wood bonding method.
(2) From the experimental results of the above-mentioned half-convex forcewood bonding method, it can be definitely said that it is effective.

"Explanation of connecting member H with prototype violin"
The connecting member H is a member that connects the three power trees B, and the installation position is a member that directly adheres in the lateral direction in the back plate side trunk in the immediate vicinity of the “front” position of the soul pillar. It is a structure that uses a 4mm square material, has a height of about 3mm at the center and about 1mm at both ends, and connects the two sides of the two opposite rams B in a two-member configuration. ,
The presence / absence of the connecting member H directly affects the sound volume and the installation position directly affects the sound quality. Incidentally, the connecting member H in the case of the second page of the text (Prior to (5) 0033 and FIG. 16) It is a prototype example installed near the “retrofit” position of the soul pillar, and it has been confirmed that the sound quality is superior to the one that is changed to the “front installation” position of the present invention. The difference in the distance between the base of the two frame legs when it is installed on either side of the reference position (Fig. 2), in addition, the “front” position of the soul post is closer to the center of the torso, etc. In addition,
In the “front” soul column base to the connection member H with a convex connection (0016 · 1) convex force tree bonding method, it can be called a soul column HC, but it is not as effective as the main soul column BC.

“The size of the prototypical violin Rikigi B and groove m”
The installation range of the timber B provided on the back plate side of the waistband portion is within two places on the back plate side corresponding to the right side of the inner edge of the left and right f holes, and the upper limit in the vertical direction is the fingerboard Back plate side position corresponding to directly under the terminal, the lower limit is within the back plate side position corresponding to the position between the two round holes at the left and right f hole cylinder side ends, in other words, with the limit slightly below the inside of the waist portion, The size of the timber B is a 4 mm square material, the length of the high B / low B is about 75 mm, the middle B is about 80 mm, and the groove m is moved to the corresponding position on the back plate side. The base of the force wood B is accurately carved and the depth is about 1 mm. (FIGS. 2, 3, 4, and 7) The length of the force wood B is [high B <medium B <low B]. However, the effect was not confirmed.

"Part size of prototype plywood body cello" (reference material)
The width of the bus bar D is deformed so that the width of the bus bar D is about 7 mm at both ends and the bottom of the piece leg is about 17 mm. The groove M uses a gap between a thin plate (thick portion) to be reinforced for reinforcing the back of the piece and a paste bar E, Prepared for strong string pressure without sculpting the side itself, the upper and lower diaphragms are 3mm thick, and the bulging rate is about the same as in the second embodiment. do it,
The thickness of the diaphragm is adjusted by applying the example of violin (Figs. 10 to 12), using the size of the wreck B on the back plate side (high B, low B 170 mm, medium B 190 mm, 7 mm square material processed) The main soul column BC is installed and the soul column C is located in the vicinity of the conventional position from the fixed position “front” of the position closer to the small torso side of the treble string side piece leg position to the inner edge of the f hole. This is an example of the application of the “retrofitting” arrangement, the structure corresponding to the present invention (FIG. 8), and the wide-type wide space “Rikigi B group” (FIG. 4) application. (Japanese Patent Application No. 2007-278161, FIG. 15) (drawing omitted)
Although the Rikigi A plan was abolished in the previous work, which further reinforces the plate thickness part directly below the bottom of the treble string side piece leg at the trunk central constriction part, there was concern about insufficient strength against strong string pressure,
With a single plate cylinder, if the soul pillar arrangement method of the first and second embodiments of the present invention is used, it can be carried out with the current “preparation of plate thickness” and the performance of the violin with a new kit is considered. We are convinced from the results of violin experiments that even instruments of different sizes will perform as described above if the size of the prototype violin is applied.

"First example of violin"
In this example, a new kit (15,000 yen) and a new piece (highest grade less than 5,000 yen), in addition, the plywood cylinder is replaced with the previous soul pillar position change and the new piece, and the diaphragm When the swelling state is 8mm on the front plate, 10mm on the back plate, and 37mm on the side plate, the sound volume and sound quality will be optimal.
The main soul column of “retrofitting” from the fixed position of the conventional soul column C slightly inside the trunk on the large torso side to the position laterally moved to the position near the inner edge of the hole f, based on the position immediately below the treble string side piece leg position It is a way to arrange two pairs of soul pillars with a “front” soul pillar C installed in the trunk a little closer to the f hole than the fixed position about 11 mm closer to the small body side from the reference position. The “Rikigi B group” to be combined with this, using a wide-type wide interval (FIG. 4),
In addition to the new kit and plywood cylinder (Figs. 1, 2, 3, 4 and 5), the self-flow "preparation of plate thickness" (Figs. 10, 11 and 12) was applied. An example,
The above is a soul pillar arrangement diagram described in (Japanese Patent Application No. 2007-104309, 0027, FIG. 12). In the present invention, Rikigi A is abolished and the groove M is also described in (Patent Application No. 2005-128593, 0012) This is a structure that employs a depth of 3 mm or less and a depth of 1 mm or less.

"Second example of violin"
Using the plywood body violin, the swelling state of the diaphragm is about 6 mm on the front plate and about 8 mm on the back plate, and the width of the side plate is widened to about 40 mm, using the soul column arrangement of the first embodiment as it is, If a narrow-type narrow “Rikigi B group” is used on the back plate side, the height B is slightly closer to the center of the trunk than the above item, and the “front” soul column position is Since it is in the body slightly closer to the f hole than the position, the soul column is “front-attached” and the main soul column BC becomes the main soul column BC, and the lower side is connected to the high B back part. The structure with the soul pillar C installed is slightly wider than the f-hole width of the upper plywood body, so it feels like “strong sound volume and sound quality”. (Fig. 6, Fig. 7, Fig. 2, Fig. 3, Fig. 5, Fig. 10, Fig. 11, Fig. 12)

"Other examples of violin"
The single plate cylinder remodeling kit (FIG. 8) of the present embodiment is an example in which a new high-quality piece is adopted in (0002 description, (8) draft, FIG. 1). Because of the main soul column BC, although the inner edge of the f hole is slightly deformed, it is the best performance with a single plate cylinder remodeled product,
The present invention (FIG. 9) is a “front” of the use of the soul pillar with the knob of the previous plan (2) using a remodeled plywood body using the soul pillar arrangement of (0002 description, {circle around (7)}, FIG. 11). In the example of Soul Pillar C,
It is concluded that the soul pillar “front” can only be used with the plywood cylinder in (0009).

  It is a top view of a 1st example and a front plate cylinder inner side.   It is expansion explanatory drawing of the lower part of the piece which looked at the soul pillar position from the said middle B position.   It is an expansion explanatory view of how to install all necessary parts in the trunk as seen from the trunk head side.   It is a top view of the wide type and wide space | interval "rikigi B group" by the back board side.   It is explanatory drawing of the range which can install "two pairs of soul pillars".   It is a top view of 2nd Example and a front-plate cylinder inner side.   It is a top view of a narrow type and narrow space | interval "Rikigi B group" by the back board side.   This is an example in which the main soul column BC is “prepared” immediately to the inner edge of the f hole.   This is an embodiment in which the soul column C is “prepared” immediately to the inner edge of the f-hole.   It is a top view which shows board thickness by the grain direction inside a plywood cylinder front board cylinder.   It is a top view which shows board thickness by the grain direction inside a plywood cylinder back board cylinder.   It is the expanded sectional view of the plate | board thickness which looked at the cut surface of the plywood body small body side from the large body side.

Explanation of symbols

B ……………… Rikiki on the back plate side (High B, Medium B, Low B) One set of BCs …………… The main soul column, and the bottom of the soul column protrudes from the high B back Connection C ………… Conventional soul pillar, flat connection to the plane between the upper and lower diaphragms D ……………… Bus bar
E ……………… Adhesive bar F (f hole) …… f-shaped acoustic hole H ……………… Connecting member between three timbers B on the back plate side K ……………… High string side Unit for indicating the distance between the bottom of the frame leg and the position of the soul column m ……………… Fitting groove on the bottom of Rikigi B M ………….

Claims (1)

Connected to the main soul pillar BC with the main soul pillar BC, which is composed of the brilliant B, groove m, connecting member H, etc. in the trunk center constricted part of the back side of the wooden bowed instrument. Also has C,
The power tree B is a member having a longitudinal direction in the back plate side of the trunk in the waistband portion as a general installation range. The high string is high B, the middle is medium B, and the low string is low B. Consisting of
The groove m has a structure in which a shallow groove having the same shape as the bottom of the reinforced wood B is preliminarily carved into a corresponding portion on the back plate side, and the bottom of the three reinforced wood B is fitted by providing the groove m. , The semi-convex type force wooden lacquer construction method that allows the upper part to stick out from the back plate surface is possible,
The connecting member H is a member for directly connecting the three power trees B by directly adhering in the lateral direction on the back plate side at the “front” position closest to the following soul pillar installation position,
As described above, the entire structure of the convex part on the back plate side constituted by the three timbers B by the semi-convex type timber bonding method and the connecting member H is collectively referred to as the above-mentioned `` branch group B ''.
The installation position of the soul pillar is the fixed position at the two positions before and after the treble string side piece base bottom, and the horizontal direction from each fixed position to the inside of the treble string side f hole is the range where the soul pillar can be installed As for the conventional soul column C side slightly closer to the torso side than the reference position as a “retrofitting” range, and from the reference position to a side of the torso that is slightly less than three times the interval as a “front attachment” range,
The main soul column BC is selected from any one of the “front” and “rear”, and is connected to the high B back portion, which is arranged directly below the soul column, and is connected to the soul column in a different designation. Using the "two-pair soul pillar" arrangement method with plano-convex connection, connecting the bottom of the C flat to the back plate side plane,
By connecting the main soul column BC of "Two-pair soul columns" and the high B of "Rikigi B group", string vibrations from the piece, front plate, bus bar D, etc., through the soul column C In addition to the normal transmission to the plate side, from the newly established main soul column BC, in the order of [High B, connecting member H, middle B, connecting member H, low B, groove m (groove wall, groove bottom)] The internal structure of the wooden bowed instrument characterized by a piece vibration transmission path to the back plate side by the above-mentioned “Rikigi B group” whole way system.
The ultimate frame vibration transmission promoting internal body structure 4 for a bowed instrument having the above-described configuration.

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