JPS5840756B2 - Wire-wound strings for musical instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wire-wound string for musical instruments used in pianos, guitars, etc., which is capable of improving the vibration transmission characteristics of the string, in other words, the tone color.

The fundamental vibration of a string used in stringed instruments such as pianos and guitars is given by the following equation, where ■ is the length of the string, T is the tension, and m is the mass per unit length, so the fundamental vibration fr When the determining factor is limited by the size of the instrument, in other words, when the wire length is limited, the mass m per unit length of the string is taken into consideration.

However, when a bass string such as a piano uses a single wire whose thickness is simply increased to increase the mass per unit length, the bending stiffness of the string increases, and partial vibration occurs stronger than the basic vibration. Because of this tendency, it is usually constructed using wire-wound strings.

In other words, as shown in Fig. 1, this wire-wound string has a music wire 1 as a core wire, which is very uniform, has high tensile strength, large elasticity, and high volume, and has a wire on the outside that has low hardness and is easy to work with. Winding wire 2 made of rich pure copper wire 1
It is constructed by wrapping it in two or more layers.

However, the winding wire 2 of the winding string having such a configuration is either wound with adjacent winding wires closely attached to each other without any gaps over the entire length of the core wire 1, or with a predetermined gap provided. It is wound at a constant pitch to make the whole thing uniform, but because it is uniform, it cannot necessarily be said that it is the best one in terms of pronunciation characteristics (・.

In other words, when the above-mentioned wire-wound string is vibrated, the fundamental mode (fundamental tone)
In addition, it exhibits vibration characteristics that include many higher-order harmonics whose frequencies are exactly integer multiples of the fundamental frequency.

These high-order overtones have the function of making the volume feel louder and creating a richer tone, making the pitch of the fundamental tone more clearly felt, but it is difficult to remove the dissonant vibrations mixed in with the overtones. there were.

Therefore, this invention is an improvement in view of the above-mentioned conventional drawbacks, and by changing the vibration characteristics of a part of the wire-wound string, the overtone composition is changed and a more varied tone can be obtained. The present invention provides a wire-wound string for a musical instrument, and attempts to achieve the above object by partially changing the winding density of the winding wire wound around the core wire.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The wire-wound string for musical instruments according to the present invention will be explained in detail below with reference to the drawings.

FIG. 2 is a front view showing an embodiment of the present invention. In the same figure, the winding string 10 has a winding wire made of pure copper wire over the entire length of the core wire 11 made of commonly used music wire. 12 is wound with a sparse winding density in the center portion and with a dense winding density in both left and right end portions.

That is, the central portion of the winding string 10 where the winding wire 12 is loosely wound has a smaller mass per unit length than the other portions, thereby reducing bending stiffness.

Therefore, when the winding edge 10 configured as described above is vibrated, the kinetic energy in the central part is relatively weakened compared to other parts, and as a result, the fundamental tone is suppressed and the first overtone becomes relatively weak. become stronger.

In other words, by making the winding wire 12 sparse in the central part of the winding edge 10, the result is the same as suppressing vibration by lightly contacting an appropriate buffer with the node of the first overtone. Therefore, at the same time as the fundamental tone is suppressed, the first, third, fifth, etc. odd components of the higher harmonics remain, and the second, fourth, sixth, etc. Even-numbered components of . . . are suppressed or eliminated.

Therefore, the harmonic structure of the winding edge 10 is completely different from that of the conventional winding edge described above, and the tone color is significantly changed.

FIG. 3 is a front view of a winding edge 10 showing another embodiment of the present invention, in which a winding wire 12 is attached to a core wire 11 in the opposite manner to that shown in FIG.
The number of turns is dense in the central part of the coil, and the left and right end parts are wound sparsely.

Therefore, when the winding edge 10 is vibrated, the vibration energy in the central part becomes relatively small compared to other parts, so the vibration sustainability of the fundamental tone is improved, and the vibration energy of the odd number with many dissonant vibrations is improved. By eliminating high-order overtones, you can obtain a more bass-like sound.

Furthermore, based on the same idea as above, if the winding density of the wire wound around the core wire is made to alternate between sparse and dense windings at regular intervals over the entire length of the core wire, even more unique vibration characteristics can be obtained. It is possible to obtain a winding edge.

As described in detail above, according to the winding edge for a musical instrument according to the present invention, the winding wire is wound around the core wire by partially changing the winding density, so it is different from the conventional winding edge in which the winding wire is wound evenly. It is possible to significantly change the vibration characteristics of the strings compared to the previous one, and as a result, it is possible to obtain a more varied tone with a different overtone structure.

Moreover, since the winding of the winding wire is done mechanically,
It has excellent effects such as being accurate and easy to manufacture.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a conventional winding edge, FIG. 2 is a front view showing one embodiment of a winding edge for a musical instrument according to the present invention, and FIG. 3 is a front view showing another embodiment of the present invention. It is a diagram. 10... Winding edge, 11... Core wire, 12
・・・・・・Winding wire.

Claims (1)

[Claims] 1. A wire-wound string for a musical instrument, characterized in that the winding wire wound around the core wire is constructed by partially changing the winding density.