JPH01136190A - Echo intensifier for grand piano - Google Patents

Abstract

PURPOSE: To effectively utilize a sound generated downward from a sound board and to sufficiently amplify the sound of a ground piano by arranging the sound increment face of a sound increment member obliquely from the sound board. CONSTITUTION: One end edge of a sound increment board 6 is attached pivotally on the rear side side-plate 5b of the ground piano 1 by a hinge 7, the other end edge is locked on the front side side-plate 5a of the piano 1 through strings 8, 8 and the sounding increment face 6a is arranged under the sound board 4 at a suitable inclination angle. Thereby a sound generated from the sound board 4 of the piano 1 downward is reflected to a proper direction by the face 6a of the board 6 and the sound of the piano 1 is sufficiently amplified. Even in the case of performing a piano concerto in a state arranging a large organized orchestra on the back, the sound of the ground piano 1 is sufficiently obtained and acoustic balance with the orchestra is extremely improved, and even in the case of executing performance in a hall of short reverberation and a small echo, a sufficient echo is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for increasing the resonance of a grand piano.

[Prior Art] Generally, when playing a grand piano in a hall or recording studio, the roof (see numeral 2 in Figs. 1 and 2) is opened and the jack-up rod (see numeral 2 in Figs. (see 3). During a performance, the string vibrations of the grand piano are transmitted to the soundboard (see number 4 in Figures 1 and 2) inside the grand piano, which converts them into sound and emits them upwards. The sound of the grand piano is reflected by the roof and transmitted forward (in the direction of the audience in the case of a hall, and towards the microphone in the case of a recording studio). That is, the roof of the grand piano has the function of increasing the resonance of the grand piano when opened.

[Problems to be Solved by the Invention] By the way, the soundboard inside the grand piano is exposed even towards the bottom of the grand piano, and during performance, the soundboard is exposed not only upward but also downward. It's making a sound.

However, conventionally, as mentioned above, the sound emitted upward from the soundboard is reflected by the roof and used for amplification, but the sound emitted downward from the soundboard is not utilized.

On the other hand, when playing a piano concerto with a large orchestra in the background, the grand piano may not have enough reverberation, resulting in a very poor acoustic balance with the orchestra, or it may be played in a hall with a short reverberation time and low reverberation. It is desired to further increase the reverberation of a grand piano, taking into consideration the following.

The present invention was devised under these circumstances, and is an amplification system for a grand piano that makes it possible to sufficiently increase the resonance of a grand piano by effectively utilizing the sound emitted downward from the soundboard. The purpose is to provide equipment.

[Means for Solving the Problems] Therefore, the grand piano sound amplification device of the present invention has a sound amplification surface below the soundboard that reflects sound emitted downward from the soundboard. It is characterized in that it includes a sound amplifying member, and the sound amplifying surface of the sound amplifying member is arranged at an angle with respect to the sound board.

[Function] In the above-described grand piano sound amplification device of the present invention, the sound emitted by the sound board of the grand piano downward is reflected in an appropriate direction by the sound amplification surface of the sound amplification member, used to increase the resonance of

[Examples] Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a grand piano sound amplifying device as a first embodiment of the present invention. In FIG. 1, 1 is a grand piano, 2 is a roof of the grand piano 1, and 3 is a roof 2.
A thrust beam for fixing and supporting this roof 2 when it is opened,
4 is a soundboard in the grand piano 1, and 5a and 5b are respectively the grand piano 1. The front side plate and the rear side plate 6 are a sound amplifying board as a sound amplifying member having a sound amplifying surface 6a that reflects sound emitted downward from the sound board 4.

In this embodiment, the sound amplifying board 6 has one end connected to a hinge 7.
is pivotally connected to the rear side plate 5b of the grand piano 1, and the other end is connected to the grand piano 1 via strings 8, 8.
It is locked to the front side plate 5a of the front side plate 5a. As a result, the amplifying surface 6a
(Sound amplifying board 6) is arranged below the sound board 4 at an appropriate inclination angle with respect to the sound board 4. This angle of inclination is the string 8
, 8 and by rotating the sound amplifying board 6 around the hinge 7.

Note that the sound amplifying board 6 is formed, for example, by stacking two transparent plastic plates (rectangular shapes) with a thickness of about 8 mm.

Since the grand piano sound amplification device according to the first embodiment of the present invention is constructed as described above, the grand piano 1
The sound emitted downward by the sound board 4 is directed in an appropriate direction by the sound amplifying surface 6a of the sound board 6 [in this embodiment, in the front, that is, in the case of a hall, the sound is directed toward the audience (to the right when facing the keyboard). direction)], and the resonance of the grand piano l is sufficiently increased.

As a result, even when playing a piano concerto or the like with a large orchestra in the background, the resonance of Grand Piano 1 can be obtained sufficiently, resulting in an extremely good acoustic balance with the orchestra. It is possible to obtain sufficient resonance even in the case of

Furthermore, at this time.

The angle of inclination of the sound amplifying surface 6a (sound amplifying board 6) with respect to the sound board 4 is determined by adjusting the length of the strings 8, 8 depending on the situation of the hall or recording studio where the grand piano 1 is used. It is optimally adjusted by rotating around the hinge 7.

In addition, in this embodiment, since the transparent sound amplifying board 6 is pivotally attached to the grand piano 1 by the hinge 7 and locked by the strings 8, 8, when the grand piano 1 is viewed from the audience side during the performance, , the audience will not feel any discomfort due to the presence of the sound reinforcement board 6. Furthermore, when the sound amplifying board 6 is not used, the sound amplifying board 6 may be removed from the grand piano 1, or the string 8
, 8, the sound amplifying board 6 may be pulled up and stored horizontally below the sound board 4.

When using the sound amplification board 6, the sound amplification board 6. It is also conceivable that the hinge 7 and the string 8 may vibrate, causing unnecessary noise. Therefore, for example, as shown by the chain line in FIG.
, 9 may be arranged between the lower part of the sound amplifying board 6 and the floor surface of the stage or the like, and the vibrations may be absorbed by these rubber stoppers 9, 9.

Furthermore, in this embodiment, the sound amplifying board 6 is formed by overlapping two plastic plates, thereby obtaining strength enough to maintain the sound amplifying surface 6a in a planar shape.

By the way, when playing the grand piano 1 by placing it on a floor covered with thick carpet, the sound of the grand piano 1 may be absorbed by the carpet and the resonance may be reduced. In such a case, the volume increaser 6 attached to the grand piano 1 as described above may be removed and placed directly on the floor below the soundboard 4, or in particular in the case of this embodiment, the volume increaser 6 Since the container plate 6 is formed from two plastic plates, the two plastic plates may be opened and laid on the floor as shown by the chain lines in FIG.

As a result, the sound emitted downward from the soundboard 4 of the grand piano 1 is reflected by the volume increaser plate 6 and is not absorbed by the carpet, etc., so that it is possible to obtain a sufficient sound from the grand piano 1. Become.

In the first embodiment, the angle of inclination of the augmentation surface 6a is adjusted by adjusting the length of the strings 8, 8, but instead of providing the strings 8, 8, the rubber stoppers 9, The angle of inclination of the volume increasing surface 6a may be adjusted depending on the position and shape of the strings 9, and rod-shaped members may be used instead of the strings 8, 8.

In addition, in the first embodiment, the volume expansion plate 6 is pivotally attached to the grand piano 1, but the volume expansion plate 6 can be separated from the grand piano 1 and transported from the storage location when necessary. The expansion surface 6a may be adjusted to an appropriate inclination angle and placed below the soundboard 4, or the expansion surface 6a may be adjusted to an appropriate inclination angle from the floor of the stage on which the grand piano 1 is placed. The surface 6a may be made to rise, and the same effect as described above can also be obtained by this.

Further, in the first embodiment, the volume expansion plate 6 is formed of a transparent plastic plate into a rectangular shape, but the present invention is not limited to this, and the volume expansion plate 6 may be made of acrylic material, wood, etc. It may be formed from an opaque material such as opaque material, or similarly to the roof 2, it may be formed into the same planar shape as the grand piano 1.

Further, in the first embodiment, the volume increasing surface 6a is a flat surface, but the volume increasing surface 6a may be formed into an appropriate surface shape (a curved surface, a combination of a curved surface and a flat surface, etc.) depending on the acoustic effect in the hall or recording studio. ) may be formed.

Next, a description will be given of a grand piano volume increaser as a second embodiment of the present invention. FIG. 2 is a perspective view thereof. Incidentally, in FIG. 2, the same reference numerals as those already described indicate the same parts, so the explanation thereof will be omitted.

In this second embodiment, instead of the volume expansion plate 6 of the first embodiment,
As shown in FIG. 2, a roof-shaped volume expansion device 10 is used as a volume expansion member having front and rear volume expansion surfaces 10a and 10b at appropriate inclination angles.

This volume expansion device 10 is movable, and a second
As shown in the figure, it is arranged below the soundboard 4 of the grand piano 1.

With the above-mentioned configuration, the same effects as in the first embodiment can be obtained in the second embodiment, and in addition, in the second embodiment, the sound emitted downward by the soundboard 4 of the grand piano 1 is as follows.
The light is reflected forward and backward (leftward toward the board) by the volume expansion surfaces 10a and 10b of the volume expansion device 10, respectively. As a result, in a hall where seats were arranged behind grand piano 1, even if the roof 2 was opened, the sound was only sent forward and was difficult to hear in the seats behind grand piano 1. By arranging the device 10, the resonance of the grand piano 1 can be sufficiently increased even at the rear of the grand piano 1.

In this second embodiment, the volume expansion device 10 is separated from the grand piano 1 and is movable; however, the volume expansion device 10
may be suspended below the grand piano 1, or may be raised from the floor of the stage on which the grand piano 1 is placed.

Further, in the second embodiment, there are two volume expansion surfaces, the front and the rear, but a plurality of similar volume expansion surfaces may be provided, or the volume expansion device 1
0 may be a curved surface such as a conical shape or a spherical shape instead of a roof shape.

[Effects of the Invention] As detailed above, the volume increaser for a grand piano of the present invention has a volume increaser below the soundboard that reflects sound emitted downward from the soundboard. With this extremely simple structure, the sound emitted downward from the grand piano's soundboard is properly controlled by the volume increasing surface. This will sufficiently increase the resonance of the grand piano, so even when playing a piano concerto or the like with a large orchestra in the background, the resonance of the grand piano will be sufficient and the acoustic balance with the orchestra will be maintained. In addition to this, it is possible to obtain sufficient reverberation even when performing in a hall with a short reverberation time and low reverberation.

[Brief explanation of the drawing]

1 and 2 are perspective views showing a grand piano volume increasing device as a first and second embodiment of the present invention, respectively. 1 - grand piano, 2 - roof, 3 - thrust rod, 4 - sound board, 5a - front side plate, 5 b - rear side plate, 6 - volume expansion plate as volume expansion member, 6a - volume expansion surface , 7-hinge, 8-string, 9-rubber stopper, 10--volume expansion device as volume expansion member, 10a, 10b-volume expansion surface.

Claims (1)

[Claims] A sound amplifying member having a sound amplifying surface that reflects sound emitted downward from the sound board is provided below the sound board of the grand piano, and the sound amplifying surface of the sound amplifying member is directed against the sound board. A grand piano sound amplification device characterized by being arranged at an angle.