JP2012252118A - Change method and adjustment component for piano sound quality and piano - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a change method and an adjustment component for the sound quality of a piano and a piano with it, by which characteristics of a sound board can be changed independent of a contour shape of the piano and sound characteristics of the sound board of an existing piano can be adjusted.SOLUTION: With this piano sound quality change method, the sound quality of a piano is changed by suppressing a vibration at least of a sound board or a sound rib by a press contact of a flat face of a sound quality adjustment component having a leg with the flat face against a surface of a sound board converting a string vibration to an air vibration or of a sound rib whose other side contacts with the sound board. The sound quality adjustment component is preferably to be set between the sound board and a metal frame, between the sound board and a column, or between the sound rib and the column.

Description

  The present invention relates to a method for changing the sound quality of a piano and a sound quality adjusting member for a piano used therefor, and in particular, a piano that changes the sound quality of a piano by adjusting the sounding condition of a soundboard in an existing piano. The present invention relates to a sound quality changing method, a sound quality adjusting member for a piano, and a piano.

  A piano strikes a string by operating a hammer with a keystroke, transmits the vibration generated by the struck string to a soundboard having a wide surface through a piece, and generates air vibrations on this soundboard, thereby producing an ear. It is structured to emit sound that can be heard.

  In such a piano configuration, since the soundboard generates the final sound (piano sound), the quality, quality, volume, etc. of the piano, in other words, the sound quality, volume, etc. of the piano, in other words, sound It is no exaggeration to say that the characteristics are determined.

  This sound board is generally composed of a solid board such as spruce or a wood board such as plywood, and a piece for transmitting vibration is provided on the surface, and the vibration transmitted to the sound board is provided on the back surface. A sounding bar is provided to expand the whole.

In the past, various proposals have been made to improve the acoustic effect of the piano, and improvements to the soundboard have also been proposed.
For example, in Patent Document 1 (Japanese Utility Model Laid-Open No. 05-059496), a piano soundboard having a great influence on the sound quality of the piano is provided with a V-shaped groove to further improve the sound quality of the piano (the sound rises well, It has been proposed to perform a further expansion of the sound and improve the extension of the sound because it contains many overtone components.

  Further, in Patent Document 2 (Japanese Patent Laid-Open No. 07-271349), in order to obtain an acoustic piano that can provide a vibrato effect and expand the range of performance, the musical sound radiated from the soundboard to the outside is repeatedly blocked. An acoustic piano vibrato mechanism has been proposed. That is, in Patent Document 2, a slit plate having an outer peripheral shape that matches the outer peripheral shape of the soundboard is disposed above the string frame on which the soundboard is mounted, and sound is emitted from the soundboard by this slit plate. It has been proposed that the musical sound is amplitude-modulated and the vibrato effect is imparted by shielding / radiating the musical sound.

  And in patent document 3 (Unexamined-Japanese-Patent No. 08-030264), adjusting the acoustic effect with a simple structure is proposed by providing the through-hole which connects the inside of a piano and the piano back side exterior. . That is, in this Patent Document 3, since the acoustic adjustment at the time of manufacturing a piano equipped with a soundboard is an easy operation of opening a through hole and adjusting the shape and diameter, the manufacturing cost is advantageous. In addition, it has been proposed that it can be realized with little change in the design of a conventional piano because it only opens a through hole in the soundboard.

Japanese Utility Model Publication No. 05-059496 JP 07-271349 A Japanese Patent Application Laid-Open No. 08-030264

As mentioned above, since the soundboard actually generates piano sound, the material, structure, shape, mounting structure, etc. of the soundboard are important in determining the acoustic characteristics of the piano. .
Therefore, in the past, although the overall shape of the soundboard was designed in advance so that the best sound can be emitted, the shape is naturally restricted. For example, in a grand piano, the shape of the side plate that forms the outer periphery of the grand piano determines the contour shape of the plane.

  Therefore, in the present invention, the first problem is to provide a piano sound quality changing method, a piano sound quality adjusting member, and a piano on which the piano sound is installed, in which the characteristics of the soundboard can be changed separately from the shape of the side plate. To do.

  In addition, in the case of a conventional piano, after the soundboard is formed as originally designed, the sound characteristics of the soundboard cannot be changed, and the sound characteristics have changed due to long-term use. However, unless the soundboard itself was replaced, its acoustic characteristics could not be corrected.

  Therefore, in the present invention, it is a second object to provide a piano sound quality changing method, a piano sound quality adjusting member, and a piano provided with the same, which can adjust the acoustic characteristics of a soundboard in an existing piano.

  Furthermore, in order to change the acoustic characteristics of the soundboard, it has also been proposed to make a hole in the soundboard, but once the hole is made, it cannot be restored. Accordingly, a third object of the present invention is to provide a piano sound quality changing method, a piano sound quality adjusting member, and a piano on which the piano sound quality adjusting member can be easily restored.

  In order to solve the above-mentioned problems, in the present invention, a member capable of suppressing vibration of the soundboard or the soundbar, and preferably transmitting the vibration of the soundboard or the soundbar to the frame is placed in contact with the soundboard or the soundbar. And a member for the same.

  That is, in the present invention, a leg portion having a flat surface is provided on any surface of the soundboard for converting the vibration of the string into the air vibration, or on the other surface of the sounding rod where any surface is in contact with the soundboard. Further, there is provided a piano sound quality changing method for changing the sound quality of a piano that changes the acoustic characteristics of a soundboard by pressing the flat surface of the sound quality adjusting member in a pressure manner and at least partially suppressing vibration of the soundboard or soundbar.

  The sound quality adjusting member used in such a piano sound quality changing method solves at least one of the above-described problems, and includes a leg portion in which a surface in contact with a soundboard or a soundbar is formed flat, for example, It can be formed as follows.

  That is, at least between the soundboard (preferably the area where the soundbar is present on the lower surface of the soundboard) and the frame provided with a plurality of tuning pins, or between the soundbar that is in contact with the back side of the soundboard and the column. And has a height equal to or greater than the distance between the soundboard and the frame or the soundbar and the column at the installation location, and is elastically deformable in the height direction, and It can be formed as a sound quality adjusting member of a piano in which the end surface of the leg portion existing on the side pressed against the soundboard or the soundbar is formed flat.

  The sound quality adjusting member of this piano has legs formed on the side in contact with the soundboard or the soundbar, and its end surface, that is, the surface in contact with the soundboard or the soundbar, must be formed flat. This is to suppress the soundboard and the soundbar, and on the uneven surface, the contact with the soundboard and the soundbar becomes a point contact, and the vibration cannot be effectively suppressed. However, the area of the leg end face that comes into contact with the soundboard and the sounding bar can be adjusted as appropriate according to the area of the region that suppresses the vibration of the sounding board and the sounding bar, and the planar shape is also circular, elliptical, A rectangle, a polygon, etc. can be suitably adjusted.

  Further, the sound quality adjusting member of the piano has a head formed on the other end side of the leg portion, and is a columnar shape in which cork or other elastic members are disposed between the leg portion and the head as a whole. Alternatively, one or more leg portions may be provided on the lower surface of the flat plate member, and the head may be formed upright on the upper surface of the flat plate member.

  This sound quality adjustment member suppresses vibrations of the soundboard and soundbar, or transmits these vibrations to the frame and struts, so that it can guarantee natural resin such as wood and their functions. It can be formed using a synthetic resin having a hardness, a metal, or the like, and can be configured by appropriately combining these members.

  By installing the sound quality adjusting member so as to be sandwiched between at least one or two places between the soundboard and the frame, between the soundboard and the support, and between the sounding stick and the support. The vibration of the soundboard and the sounding bar can be suppressed, and thereby the sound generation area of the sounding board and the sounding bar can be arbitrarily adjusted. As a result, the sound quality adjusting member can be adjusted so that a desired sound quality can be produced by arbitrarily adjusting the installation location of the sound quality adjusting member and the contact area thereof.

  The sound quality adjusting member that presses and holds the soundboard and the sounding bar transmits the vibrations of the sounding board and the sounding bar to the frame and the column made of metal. And since the metal frame and support | pillar to which this vibration was transmitted have large mass, the transmitted vibration can be maintained for a long time. Thereby, the vibration of a metal frame or a support | pillar can be circulated through a sound board or a sounding board via a sound quality adjustment member, and thereby a deep sound can be generated. That is, by using this sound quality adjusting member, the soundboard and the metal frame, or the soundboard, the soundbar, and the support can be made to emit sound, instead of the vibration of only the soundboard.

As described above, since the acoustic characteristics of the piano can be arbitrarily adjusted by using the sound quality adjusting member according to the present invention, in the piano sound quality changing method according to the present invention, the sound quality adjusting member is described below. (1) and (2), the piano sound quality changing method can be set so as to be sandwiched in one or more places selected.
(1) Between the region where the sounding rod exists on the lower surface of the sounding plate, preferably the sounding plate, and the frame provided with a plurality of tuning pins. (2) The sounding rod in contact with the back side of the sounding plate, and the column. Between

  In such a piano sound quality changing method, a plurality of sound quality adjusting members are provided between the soundboard and the frame, between the soundboard and the frame, between the soundboard and the support, or between the soundboard and the frame, and A plurality can be provided between the columns.

  Moreover, it is desirable to use a member that can be elastically deformed in the height direction as the sound quality adjusting member used in this piano sound quality changing method. By using a material that can be elastically deformed, by pushing the sound quality adjusting member between the above (1) and (2), the leg portion by elastic deformation when the sound quality adjusting member returns to its original shape. The end face of can be pressed against the soundboard or the soundbar in such a manner as to strongly press the soundboard or the soundbar. Further, since the sound quality adjusting member can be elastically deformed in the height direction, it is possible to cope with a change in the soundboard warpage due to drying or the like.

  Therefore, in the sound quality adjusting member according to the present invention, the head is formed on the other end side of the leg portion, and is the columnar shape in which cork or other elastic members are disposed between the leg portion and the head as a whole? Alternatively, it is desirable that one or two or more leg portions are provided on the lower surface of the flat plate member, and the head is erected on the upper surface of the flat plate member.

And in this invention, in order to solve at least any one of the said subject, the piano which installed the said sound quality adjustment member is provided. That is, the piano is characterized in that the above-described sound quality adjusting member of the piano according to the present invention is installed by being sandwiched in one or more places selected from the following (1) and (2).
(1) Between the region where the sounding rod exists on the lower surface of the sounding plate, preferably the sounding plate, and the frame provided with a plurality of tuning pins. (2) The sounding rod in contact with the back side of the sounding plate, and the column. Between

Such a piano may be a piano having a soundboard, and may be implemented not only on an acoustic piano such as an upright piano or a grand piano, but also on an electronic piano configured to generate sound using a soundboard. it can.

  According to the above-described piano sound quality changing method according to the present invention, any surface of the soundboard that converts the vibration of the string into the air vibration, or the other surface of the soundbar that is in contact with the soundboard is flat. By pressing the flat surface of the sound quality adjustment member with the leg portion having the surface, at least vibration of the soundboard or soundbar is suppressed, and vibration between the soundboard or soundbar and the metal frame or column is vibrated. Therefore, the acoustic characteristics of the piano can be changed or improved by simple parts and methods.

  Also, the sound quality adjusting member is provided between (1) the soundboard, preferably a region where a soundbar is present on the lower surface of the soundboard, and a frame provided with a plurality of tuning pins, and (2) the soundboard. The sounding board or the sounding stick can be pressed reliably by being sandwiched and installed in any one or more places selected between the sounding stick in contact with the back side of the sounding column and the sounding board. Alternatively, the vibration of the sounding bar is transmitted to a metal frame or column to vibrate them, and the sounding board or sounding bar can be vibrated by the vibration, so that the sound effect can be further improved or changed. it can.

  The sound quality adjusting member according to the present invention includes at least (1) a soundboard (preferably a region where a soundbar is present on the bottom surface of the soundboard) and a frame provided with a plurality of tuning pins, and (2 ) The distance between the soundboard and the frame or the distance between the soundbar and the support in any installation location selected from between the sounding stick in contact with the back side of the sounding board and the support. Since it has a height, is elastically deformable in the height direction, and the end surface of the leg portion that is present on the side in pressure contact with the soundboard or soundbar is formed flat, it has a simple structure, And it is easy to install, and without changing the soundboard of the piano, making holes, or bonding parts, the sound characteristics of the soundboard, and the overall sound of the piano The effect can be improved. In particular, by using such a sound quality adjusting member, the sound quality adjusting member can be removed later to return to the state before the installation.

  Further, the sound quality adjusting member has a head formed on the other end side of the leg portion, and as a whole, the sound quality adjusting member has a columnar shape in which a cork or other elastic member is disposed between the leg portion and the head, or Each sound quality adjusting member can be made into a small module by providing one or two or more leg portions on the lower surface of the flat plate member and forming the head portion on the upper surface of the flat plate member. As a result, a plurality of necessary pieces can be installed according to the installation location.

And, the sound quality adjusting member of the piano according to the present invention is as follows: (1) Between the soundboard (preferably a region where a sounding bar is present on the lower surface of the soundboard) and a frame provided with a plurality of tuning pins; (2) any one or more places selected between the soundboard and the support to which the frame is attached; and (3) the sounding bar in contact with the back side of the soundboard and the support. Even if the acoustic effect has changed due to long-term use, it can be easily adjusted to the initial sound, and the sound quality unfavorable for the player from the beginning is preferred. The piano can be adjusted to produce sound.

It is an exploded view around the soundboard of the piano which concerns on this Embodiment. It is a principal part longitudinal cross-sectional view of a piano. It is the (A) perspective view and (B) longitudinal section showing the sound quality adjustment member concerning this embodiment. It is the (A) perspective view and (B) side view which show the sound quality adjustment member which concerns on other embodiment. It is the (A) rear view and (B) longitudinal cross-sectional view which show the piano which concerns on other embodiment.

  Hereinafter, a piano 10 sound quality changing method according to an embodiment, a sound quality adjusting member 20 used in the embodiment, and a piano 10 provided with the sound quality adjusting member 20 will be described with reference to the drawings. FIG. 1 is an exploded view around a soundboard 16 of a piano 10 according to the present embodiment, FIG. 2 is a longitudinal sectional view of a main part of the piano 10, and FIG. 3 shows a sound quality adjusting member 20 according to the present embodiment. 4A is a perspective view, FIG. 4B is a longitudinal sectional view, FIG. 4A is a perspective view showing a sound quality adjusting member 20 according to another embodiment, FIG. 5B is a side view, and FIG. It is the (A) rear view and (B) longitudinal cross-sectional view which show the piano 10 which concerns on embodiment of this.

  FIGS. 1 and 2 show an example in which a sound quality adjusting member 20 is installed on the grand piano 10. In this embodiment, the sound quality adjusting member 20 is installed between the soundboard 16 and the metal frame 11. Yes. FIG. 1 shows a state in which a back assembly 19 composed of a pile 17 and a soundboard 16 and a metal frame 11 in the grand piano 10 are disassembled, and the back assembly 19 is assembled integrally. The pile 17, a column (not shown) provided inside the pile 17, a back 18, and a soundboard 16 bonded so as to cover the upper surface thereof are formed. The soundboard 16 has a long piece 15 and a short piece 14 on its front surface, and a plurality of soundbars 13 attached in advance to the back surface. The soundboard 16 is forcibly dried before the soundbar 13 is attached, and after the attachment. By leaving it in a normal state, the surface side is raised by the restraint of the sounding bar 13, and a muckle (crown) is formed in advance. In addition, the long piece 15 and the short piece 14 have a predetermined thickness, and have been processed into a single piece which has been completed up to the upper surface of the piece and the piece pinning, and such a single piece has been processed. After that, it is adhered to the surface of the soundboard 16. The metal frame 11 is fixed to the dowel 12b fitted in the dowel hole 12a provided on the upper surface of the soundboard 16 with screws or the like.

  FIG. 2 shows a state in which such a grand piano 10 is assembled. FIG. 2 is a partial cross-sectional view of the grand piano 10. In this figure, a plurality of sounding bars 13 are obliquely fixed to the lower surface of the sounding board 16 with an adhesive. A long piece 15 and a short piece 14 that transmit vibration from a string (not shown) to the sound board 16 are fixed to the upper surface of the sound board 16 with an adhesive. The sound quality adjusting member 20 is press-fitted between the soundboard 16 and the metal frame 11.

  In the configuration around the soundboard 16 of the piano 10 formed in this way, a sound quality adjusting member 20 is fitted between the soundboard 16 and the metal frame 11. The sound quality adjusting member 20 has its lower end leg portion 22 installed in a region where the sounding bar 13 is provided on the back surface of the soundboard 16, and its upper end head portion 21 in contact with the lower surface of the metal frame 11. Is arranged. In this installation, it is conceivable to fix the bottom surface of the leg portion 22 to the soundboard 16 and / or the upper end surface of the head portion 21 to the metal frame 11 by bonding or the like. In consideration of a change in sound quality effect, it is desirable that the sound quality adjusting member 20 is sandwiched and fixed between the soundboard 16 and the metal frame 11 by a restoring force due to elastic deformation, that is, fitted and fixed.

  3A and 3B show a sound quality adjusting member 20 that can be installed in contact with the soundboard 16. FIG. 3A is a perspective view, and FIG. 3B is a longitudinal sectional view. As shown in this figure, the basic structure of the sound quality adjusting member 20 is composed of a leg 22 having a cylindrical shape and a hole 25 formed in the center of the upper surface, and a head fitted into the hole 25 of the leg 22. 21 and both are made of wood. In particular, the leg portion 22 and the head portion 21 can be manufactured using various materials such as metal, glass and plastic in addition to wood, but at least the bottom surface of the leg portion 22, preferably the bottom surface of the leg portion 22 The upper surface of the head 21 is formed using wood. This is for efficiently realizing vibration propagation and preventing damage to the soundboard 16 surface.

  The bottom surface of the leg 22 is formed as a flat surface so as to come into surface contact with the soundboard 16, and the upper end of the head 21 is also formed as a flat surface so as to make surface contact with the soundboard 16 metal frame 11 or the column. Has been. A cork 23 for realizing elastic deformation of the sound quality adjusting member 20 is accommodated in the bottom of the hole 25 provided on the upper surface of the leg 22, and the cork 23 is joined to the lower surface of the head 21. Yes. However, the cork for realizing this elastic deformation may be only one of the bottom of the hole 25 of the leg 22 and the lower surface of the head 21. Since the cork 23 is configured to exist between the bottom surface of the head 21 and the bottom surface of the hole 25 in the leg portion 22 in this way, by applying a force that shrinks in the height direction, The cork 23 is elastically deformed, and the height of the sound quality adjusting member 20 can be shortened. In this state, the sound quality adjusting member 20 is accommodated between the soundboard 16 and the metal frame 11 and restored by elastic deformation of the cork 23. Both members are pressed in the direction in which the distance 11 is widened. As a result, the vibration of the soundboard 16 is suppressed by the sound quality adjusting member 20 that is pressure-bonded to the metal frame 11. At the same time, the sound quality adjusting member 20 that receives the vibration of the soundboard 16 transmits the vibration to the metal frame 11 and vibrates the metal frame 11 itself. The vibration of the metal frame 11 is transmitted to the soundboard 16 via the sound quality adjusting member 20, and the sound of the soundboard 16 can be maintained for a longer time. A fabric 24 such as felt is attached to the inner peripheral surface of the hole 25 formed at the center of the leg 22, and abnormal noise (such as chatter noise) is generated due to vibration between the leg 22 and the head 21. I try not to.

  In the embodiment shown in FIG. 3, the area of the bottom surface of the leg portion 22, that is, the contact surface with the soundboard 16 is made larger than the area of the top surface of the head 21, that is, the contact surface with the metal frame 11. However, this is for suppressing the soundboard 16 more reliably and preventing its vibration. However, the present invention is not limited to this, and the bottom surface of the leg portion 22 and the top surface of the head portion 21 can have the same area, or the top surface of the head portion 21 can be formed to have a larger area than the bottom surface of the leg portion 22. Further, the planar shape of the bottom surface of the leg portion 22 and the top surface of the head portion 21 is circular in this embodiment. However, the shape is not limited to this, and various shapes such as an ellipse, a triangle, and other polygonal shapes can be used. Can be formed.

  4 is a perspective view showing a sound quality adjusting member 20 according to another embodiment, and FIG. 4B is a side view. The sound quality adjusting member 20 shown in this figure is the same as the sound quality adjusting member 20 described above. The sound board 16 and the metal frame 11 can be fitted.

  The sound quality adjusting member 20 shown in this embodiment includes a plate-like body portion 26 having portions protruding in three directions in the same plane, and a circle that is erected and integrated at the center of the upper surface of the body portion 26. A columnar head portion 21 and a leg portion 22 projecting downward in the same shape as the distal end portion are formed on the lower surface of the projected distal end portion of the body portion 26. In addition to fixing the head portion 21 and the leg portion 22 to the body portion 26 with an adhesive, the head portion 21 and the leg portion 22 may be fixed using screws or the like. In the sound quality adjusting member 20 in this embodiment, the total area of the bottom surface of the leg portion 22 is formed to be larger than the area of the upper end of the head portion 21, thereby reliably suppressing the soundboard 16 and the metal frame 11. Abnormal noise (billing noise) caused by vibration can be reduced.

  In the sound quality adjusting member 20 formed in this way, the elastic deformation (restoring force) between the soundboard 16 and the metal frame 11 can be ensured by the bending elasticity in the flat plate-like body portion 26. Therefore, in such a configuration, the head portion 21 and the leg portion 22 can be formed using wood, and the trunk portion 26 can be formed using wood, synthetic resin, metal, or the like. Further, as shown in this embodiment, the planar shape of the body portion 26 is formed so as to protrude in three directions on the same plane, so that rattling at the time of installation can be suppressed. Other shapes may be used.

  FIG. 5 shows a state in which the piano 30 (upright piano 30) according to another embodiment is installed, (A) a rear view and (B) a longitudinal sectional view.

  As shown in this figure, on the sound board 38 formed in a rectangular plate shape in the upright piano 30, seven sound bars 40 are obliquely fixed with an adhesive. The sound bar 40 extends long in a direction perpendicular to the wood direction, and has a function of transmitting the vibration of the string in a direction perpendicular to the direction of the wood, and a function as a strength member of the sound board 38. . In this sounding bar 40, the interval on the low sound side is expanded by about 1.5 times the interval on the high sound side, and the space between the sounding bars 40 is gradually increased from the high sound side toward the low sound side. A long piece 37 and a short piece 35 that transmit vibration from a string (not shown) to the sound board 38 are fixed to the surface of the sound board 38 with an adhesive. The long piece 37 and the short piece 35 are joined so as to extend in the grain direction of the soundboard 38. Further, around the soundboard 38, a support 33, a clasp 34 provided on the support 33, a girder 31, a base 36, a roof 41, and a parent plate 32 are arranged. Two girders 39 are horizontally arranged inside the girder sticking 31.

  The column 33, the base 36, and the girder 39 are assembled as shown in FIG. 5, and are bonded and integrated with each other at the contact surfaces. Of course, on the front side, although not shown, a pedal and an action mechanism including a keyboard necessary as a function of the piano 30 are provided.

  In this piano 30 as well, the sound quality adjusting member 20 as described above is inserted between the sound board 38 and the metal frame 45 to suppress the vibration of the sound board 38 while suppressing the vibration of the sound board 38 to the metal. The sound quality of the piano 30 can be improved.

  In the above embodiment, the sound quality adjusting member 20 is installed between the sound board 38 and the metal frame 45. However, in addition, the sound quality adjusting member 20 is provided between the back surface of the sound board 38 and the support 33, or the sound. It can also be installed between the bar 40 and the column 33.

  According to the piano sound quality changing method, the piano sound quality adjusting member, and the piano according to the present invention, it is possible to easily improve the timbre of an existing piano, and only to tune a piano whose timbre has been changed over the years. It can be used to improve the sound quality of newly manufactured pianos.

Furthermore, since the sound quality adjusting member can be easily removed, it can be widely used in piano tuning scenes, in various performances, and in the field of piano production.

10 (30): Piano, 11 (45): Metal frame, 12a: Dowel hole, 12b: Dowel, 13 (40): Sound stick, 14 (35): Short piece, 15 (37): Long piece, 16 ( 38): sound board, 17: unloading, 18: back wall, 19: back assembly, 20: sound quality adjusting member, 21: head, 22: leg, 23: cork, 24: fabric, 25: hole, 26: body part, 31: girder sticking, 32: master board, 33: support, 34: clue, 36: foundation, 39: girder, 41: roof

Claims (5)

A sound quality adjusting member having a leg portion having a flat surface on any surface of a soundboard that converts string vibration into air vibration, or on the other surface of the sounding rod that touches the soundboard. A piano sound quality changing method for changing the sound quality of a piano, characterized in that the flat surface is brought into pressure contact and at least vibration of a soundboard or a soundbar is suppressed.
2. The piano sound quality changing method according to claim 1, wherein the sound quality adjusting member is sandwiched and installed in one or more places selected from the following (1) and (2).
(1) Between the region where the sounding rod exists on the lower surface of the sounding plate, preferably the sounding plate, and the frame provided with a plurality of tuning pins. (2) The sounding rod in contact with the back side of the sounding plate, and the column. Between
Installed at least between the soundboard (preferably the area where the soundbar exists on the lower surface of the soundboard) and the frame provided with a plurality of tuning pins, or between the soundbar that contacts the back side of the soundboard and the column And has a height equal to or greater than the distance between the soundboard and the frame or the soundbar and the column at the installation location, and is elastically deformable in the height direction, and the soundboard or A sound quality adjusting member for a piano, characterized in that the end face of the leg portion existing on the side in pressure contact with the sounding bar is formed flat.
A head is formed on the other end of the leg, and as a whole,
Columnar with cork or other elastic member placed between the leg and head, or one or more legs on the lower surface of the flat plate member and the head standing on the upper surface of the flat plate member The sound quality adjusting member according to claim 3, which has a shape formed by:
A piano characterized in that the sound quality adjusting member of the piano according to claim 3 or 4 is installed by being sandwiched in any one or two or more places selected from the following (1) and (2).
(1) Between the soundboard (preferably a region where a soundbar is present on the lower surface of the soundboard) and a frame provided with a plurality of tuning pins. (2) A soundbar in contact with the back side of the soundboard; Between the struts

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