JPH09114447A - Sound absorbing board of piano or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily obtain a sound absorbing board which absorbs or reduces a part of a generated sound by being mounted on a musical instrument such as a piano by covering a laminate body formed out of specific materials with a coating sheet made of a specific material. SOLUTION: The sound absorbing board 1 is constituted by covering the laminate body 4, having two layer bodies 2 and 3 as plate bodies laminated and adhered, with the coating sheet 5. The layer body 2 is an upper layer body and positioned on the upper side when the board is mounted on a sound generation body such as a piano and used and the layer body 3 is a lower layer body and positioned on the lower side. The upper layer body 2 is formed out of a corrugated cardboard. The lower layer body 3 is formed out of a glasswool mat 3. The corrugated cardboard 2a and glasswool mat 3 are laminated and their surfaces are fixed with an adhesive to form the laminate body 4. The coating sheet 5 is formed out of a stain sheet 5a and a felt sheet 5b and covers the entire surface of the laminate body 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorbing plate that absorbs a part of the sound generated by a musical instrument, particularly a musical instrument such as a piano, and more particularly, a sound absorbing plate mounted on a piano, particularly a grand piano, for generating a sound generated by the piano. The present invention relates to a sound absorbing plate that partially absorbs sound.

[0002]

2. Description of the Related Art Conventionally, in order to weaken or reduce the sound generated by a piano, a weak sound portion attached to the piano for making a weak sound or a sound by directly contacting a felt-like object with a string is known.

Further, a structure of a room in which a sound absorbing body is incorporated into a wall surface of a room in which a piano is placed so that sound generated by the piano does not leak to the outside, that is, a room including a wall surface, a floor surface and a ceiling provided with so-called soundproofing equipment. Is also known.

[0004]

However, in the low-pitched sound part incorporated in the piano structure, in order to reduce the sound, an object such as a felt-like body is brought into contact with the string itself to stop or weaken the vibration of the string. Due to the structure, there is a problem that the sound generated from the piano is deformed and erased. Therefore, there is a problem in that it is difficult to distinguish the length and the strength of the sound generated by the original piano, and it is difficult to practice the correct piano.

In addition, if a room of a general Japanese house is to be provided with soundproofing equipment in order to install a piano, it requires a considerably high cost and cannot be easily constructed by anyone.

Further, there is a problem in that harmonic overtones generated from musical instruments such as pianos, particularly high-order harmonic overtones, are metallic and offensive to the performer or a nearby listener and feel noisy.

The present invention is a sound absorbing plate for a piano or the like that can be easily carried by anyone and can be very easily absorbed or reduced by partially placing a sound on a musical instrument such as a piano by placing it on a musical instrument such as a piano. Aim to get.

[0008]

[Means for solving the problem] To achieve this object,
We propose a sound absorbing board for a piano or the like, characterized in that a laminated body formed by laminating a layered body made of cardboard paper board and a layered body made of glass wool mat is covered with a covering sheet made of satin sheet and felt sheet.

Further, a laminated body formed by laminating an upper layer body made of cardboard paper board and a lower layer body made of glass wool mat is formed by covering a top side and a side with a satin sheet and a bottom side with a covering sheet made of a felt sheet. We propose a characteristic sound absorbing board for pianos.

Further, a sound absorbing board for a piano or the like characterized in that a laminated body formed by laminating a layered body made of styrene board and a layered body made of glass wool mat is covered with a covering sheet composed of a satin sheet and a felt sheet. To propose.

Further, a laminated body formed by laminating an upper layer body made of styrene board and a lower layer body made of glass wool mat is characterized in that an upper surface and a side surface are covered with a covering sheet composed of a satin sheet and a lower surface is composed of a felt sheet. We propose a sound absorbing board for pianos.

[0012]

1 is a plan view of a sound absorbing plate of a piano or the like according to an embodiment of the present invention, and FIG. 2 is a perspective view thereof.
FIG. 3 is a sectional view taken along the line AA of FIG. 1, FIG. 4 is a sectional view taken along the line AA of FIG. 1 of a sound absorbing plate of a piano according to another embodiment of the present invention,
An embodiment of the sound absorbing plate of the present invention will be described with reference to FIG. 5, which is a perspective view of a state where the sound absorbing plate is placed under a music stand of a piano.

The sound absorbing plate 1 is formed by coating a laminated sheet 4 formed by laminating and adhering two layered bodies 2 and 3 which are plate-like bodies with a covering sheet 5. The layered body 2 is an upper layered body and is an upper side when it is mounted on a sound generator such as a piano and used, and the layered body 3 is a lower layered body and is a lower side.

In the first embodiment, the upper layer body 2 is made of a cardboard paper board 2a. The lower layer 3 is made of glass wool mat.

The cardboard paper board 2a of the upper layer 2 has a rectangular shape in a plan view and has a length of 110 to 150 cm and a width of 20 to 4.
It has a size of 0 cm and a thickness of 3 to 10 mm. In this example, the length is 138 cm, the width is 34 cm,
It is a thin rectangular parallelepiped with a thickness of about 5 mm.

The glass wool mat 3 of the lower layer 3 is rectangular in a plan view and has a length of 110 to 150 cm and a width of 20 to 40 m.
m and a thickness of 3 to 10 mm. In this embodiment, it is a thin and flexible rectangular parallelepiped having a length of 138 cm, a width of 34 cm, and a thickness of about 5 mm.

The cardboard paper board 2a, which is the upper layer, and the glass wool mat 3, which is the lower layer, are laminated and the surfaces thereof are fixed with an adhesive or the like to form a laminated body 4.

Therefore, the length and width dimensions of the laminated body 4 formed by laminating the cardboard paper board 2a and the glass wool mat 3 are the same as those of the cardboard paper board 2a and the glass wool mat 3, respectively, and the thicknesses of both are the same. The combined thickness is 6 to 20 mm, about 10 mm in this example.
It is. The size and shape of the laminate 4 can be changed according to the size and shape of a musical instrument such as a piano.

The covering sheet 5 comprises a satin sheet 5a and a felt sheet 5b and covers the entire surface of the laminate 4.
The satin sheet 5a covers all or part of the upper surface and side surfaces of the laminate 4, and the felt sheet 5b covers the lower surface or part of the lower surface and side surfaces of the laminate 4.

The entire surface of the laminated body 4 is covered with the covering sheet 5, but it may be covered with the voids or may be adhered without covering the voids. When closely contacting, the laminate 4 and the covering sheet 5 may be fixed with an adhesive or the like.

In the sound absorbing plate of the piano or the like of the second embodiment, the upper layer body 2 is made of a styrene board 2b. The materials, sizes, and shapes of other members are the same as those in the first embodiment. That is, the lower layer body 3 is made of a glass wool mat 3, the laminated body 4 is made by adhering and fixing the styrene board 2b and the glass wool mat 3, and the covering sheet 5 is made of a satin sheet 5a and a felt sheet 5b.

A method of using the sound absorbing plate 1 of the piano or the like will be described.

It is used by simply mounting it on a musical instrument such as a grand piano or other sound generator. In this embodiment, the grand piano 10 is used. When used for the grand piano 10, the sound absorbing plate 1 is placed under the music stand 12 located below the music stand 11 of the grand piano 10. Below the music stand 12 of the grand piano 10 is a flat portion having a length of all keyboards of the grand piano and a width of about 20 to 40 cm. This size is slightly different depending on the type of piano.

The sound absorbing plate 1 is below the music stand 12 of the piano so that the upper layer 2 is on the upper side and the lower layer 3 is on the lower side, that is, the satin sheet 5a is on the upper side and the felt sheet 5b is on the lower side.
Spread out and place.

When the sound absorbing plate 1 such as a piano is placed in this manner, it has a function of absorbing and eliminating high-order overtones in the sound generated by striking the grand piano 10. Therefore,
It is possible to eliminate the drawback that high-frequency sounds, so-called metallic sounds, can be heard directly by the performer. These high-order overtones and high-frequency sounds are mainly absorbed or absorbed by the glass wool mat 3 of the lower layer body 3.

Further, the low-frequency overtone is absorbed or absorbed by the cardboard paper board 2a of the upper layer 2 or the styrene board 2b.

Therefore, the sound absorbing plate 1 does not reduce the sound as a whole and keeps it quiet, but absorbs many frequencies of a specific overtone to provide a clean tone.

[0028]

Therefore, according to the present invention, among the sounds generated by a musical instrument such as a grand piano, especially the higher harmonics can be absorbed and can be muted, so that there is no metallic sound for the performer, so that the player can practice and practice. easy.

Further, since unnecessary sounds including overtones of low frequency can be erased, an unpleasant sound is absorbed as a whole, resulting in a clean sound.

Compared with the conventional soundproof equipment, it can be used very easily and can be supplied at a very low price. Also, since it is a size and weight that anyone can carry, it can be carried and used anywhere.

[Brief description of the drawings]

FIG. 1 is a plan view of a sound absorbing plate such as a piano according to an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line AA of FIG. 1 of another embodiment of the present invention.

FIG. 5 is an explanatory perspective view showing a state in which a sound absorbing plate such as a piano according to an embodiment of the present invention is placed under a music stand of a grand piano.

[Explanation of symbols]

 1 Sound absorption board for pianos 2 Upper layer 2a Cardboard board 2b Styrene board 3 Lower layer (glass wool mat) 4 Laminated body 5 Cover sheet 5a Satin sheet 5b Felt sheet 10 Grand piano 11 Music stand 12 Below music stand

Claims (4)

[Claims] 1. A laminated body formed by laminating a layered body made of cardboard paper board and a layered body made of glass wool mat,
A sound absorbing board for a piano or the like, which is covered with a covering sheet composed of a satin sheet and a felt sheet. 2. A laminate obtained by laminating an upper layer body made of a cardboard paper board and a lower layer body made of a glass wool mat, wherein an upper surface and a side surface are covered with a covering sheet made of a satin sheet, and a lower surface is made of a felt sheet. Characteristic sound absorbing board such as piano. 3. A sound absorbing board for a piano or the like, characterized in that a laminated body formed by laminating a layered body made of styrene board and a layered body made of glass wool mat is covered with a covering sheet composed of a satin sheet and a felt sheet. . 4. A laminate formed by laminating an upper layer body made of styrene board and a lower layer body made of glass wool mat,
A sound absorbing plate for a piano or the like, characterized in that the upper and side surfaces are covered with a satin sheet and the lower surface is covered with a covering sheet made of a felt sheet.