JP6638991B2 - Stringed instrument - Google Patents

Description

  The present invention relates to stringed instruments. More specifically, the present invention relates to a stringed musical instrument capable of generating a sound to which a higher harmonic component is added or a reverberant sound by an electric signal.

  As a musical instrument having a bridge called Jawali for adding a higher order harmonic component and a resonant string, a sitar of an Indian classical musical instrument is known, and a Viol tribe equipped with a device disclosed in Patent Document 1 is known. There is a musical instrument. A sitar or a musical instrument equipped with the device disclosed in Patent Document 1 includes a main string for directly playing and a resonance string for mainly resonating, and one end of the resonance string is supported by a Java bridge.

  The Javali bridge is characterized in that the contact surface with the resonant string is a convex curved surface that is slightly curved. In addition to the first support point that is the end of the string vibration when the string vibrates, the first support point By bringing the string into contact with the convex curved surface at a position closer to the vibration side, a string vibration sound to which a higher harmonic component is added is generated. The structure is disclosed in Patent Document 2, Patent Document 3, etc. in addition to Patent Document 1.

  If the resonant string is not supported by this Javanese bridge, it will only sound the reverberation of the sound played by the main string, but if the resonant string is supported by this Javanese bridge, the resonance to which higher harmonic components are added However, it sounds like it rises at a timing delayed from the sound played on the main string.

  For example, in Patent Literature 3, a bridge upper surface (saddle member upper surface) supporting a string is formed in a gentle curved shape along the chord direction, and a first contact position (string first position) serving as a vibration end when the string vibrates. It is described that a contact is made at a total of two or more positions, i.e., the support point) and at least one second contact position on the vibration side with respect to the position, thereby generating an overtone rich in higher-order components.

  An Indian classical musical instrument, tamboura, is a musical instrument for continuing to emit a continuous tone to which a high-order harmonic component is added. A tamboura usually has four to five strings and a Javali bridge, and the performer continuously plays these strings in a substantially constant rhythm, and a continuous sound in which high-order harmonic components are intricately intertwined. Resonate.

  However, a conventional sitar or a viol instrument equipped with the device disclosed in Patent Document 1 generates a resonance sound to which a higher-order harmonic component is added only by playing the main string of the instrument. It is not possible to sufficiently generate a resonance to which a high-order harmonic component is added by a sound from the outside of the musical instrument.

  In other words, in spite of the excellent effect that the sound with the higher harmonic component added rises in response to the sound of the main string, it requires specialized skills to play this stringed instrument to handle it As a result, only a small number of musicians can enjoy this effect. Those who do not have the skills of playing these stringed instruments cannot enjoy generating resonances to which high-order harmonic components are added. Moreover, when the sound of the main string is low, it is not possible to sufficiently generate a resonance to which a higher harmonic component is added.

  Also, many strings are exposed to the outside of the instrument, and there is a risk of injury by touching the sharp end of the string, and a risk of injury due to a broken string when the string breaks. . Moreover, since many strings are exposed to the outside of the instrument, there is also a problem that it is difficult to maintain the body of the instrument.

  In addition, tambouras require a player to keep strings in order with a substantially constant rhythm. It would be desirable if it was possible to resonate a sustained tone in which the higher harmonic components were intricately intertwined without the need for such a player.

  Next, Patent Document 4 describes a stringed musical instrument including a string, an electromagnetic exciter, and a piece, wherein the electromagnetic exciter is driven by a command signal from a control device to excite the string. .

  In the stringed musical instrument of Patent Document 4, after striking a key with a finger and striking and vibrating the string with a hammer that operates following the keystroke, the vibration state of the string is changed by an induced magnetic field from an electromagnetic exciter, The tone of the strings is changed. The excitation frequency of the electromagnetic exciter is controlled by a command from the control device. When an induced magnetic field from the electromagnetic exciter is applied to a vibrating string, the vibration state of the string changes. By moving the electromagnetic exciter to a portion corresponding to the antinode of a high-frequency string vibration that produces a predetermined harmonic in the string in the state, it is possible to emphasize or attenuate the harmonic by applying an induction magnetic field thereto. It states that string vibration can be amplified by setting the induced magnetic field to an induction frequency in the same phase as the string vibration, and conversely, string vibration can be attenuated by setting the induced magnetic field to the opposite phase to the string vibration. ing.

  However, in Patent Document 4, basically, a key is depressed with a finger, the string is struck by a hammer that operates following the depressing, and the string is vibrated. Then, the string is induced by an induced magnetic field from an electromagnetic exciter. The vibration state is changed, and the tone color of the strings and the like are changed. Therefore, also in the case of Patent Literature 4, a specialized technique for playing this stringed instrument is required, and a person who does not have the performance skill can enjoy the acoustic effect described in Patent Literature 4. Can not. In this regard, the technology described in Patent Document 4 is not different from the prior arts described in Patent Documents 1 to 3.

U.S. Pat. No. 5,883,318 U.S. Pat. No. 3,422,715 JP 2001-272972 A JP-A-04-060594

  SUMMARY OF THE INVENTION An object of the present invention is to provide a stringed musical instrument that allows a person who does not have a playing technique to enjoy a sound to which a higher harmonic component is added, a reverberant sound, a continuous sound, or the like.

  It is another object of the present invention to provide a stringed instrument capable of easily and sufficiently generating a sound, reverberation sound or sustained sound to which a higher harmonic component is added.

  Still another object of the present invention is to provide a stringed instrument with high security.

  In order to solve at least one of the above-described problems, a stringed instrument according to the present invention includes a body, a plurality of strings, a string excitation unit, and a bridge. The body section supports the string, the string excitation section, and the bridge, and the string has a chord length determined by an interval between a first support point and a second support point, The string excitation unit is driven by an electric signal, and excites the string according to the electric signal. The stringed instrument according to the present invention, in the above configuration, satisfies any of the following invention specific items (a) to (d).

(A) The bridge has the first support point and a surface that is closer to the second support point than the first support point and that contacts the string when the string vibrates.
(B) the bridge includes the first support point, and a surface that is closer to the second support point than the first support point and that contacts the string when the string vibrates;
The body has an internal space,
The string, the string excitation section, and the bridge are arranged in the internal space of the body section.
(C) the bridge has the first support point, and a surface that is closer to the second support point than the first support point and that contacts the string when the string vibrates;
The string and the bridge are arranged on an outer surface of the body.
(D) the bridge has the first support point, and does not have a portion on the second support point side of the first support point that is in contact with the string when the string vibrates;
The body has an internal space,
The string, the string excitation section and the bridge are arranged in the internal space of the body section.

  In the stringed musical instrument according to the present invention, the string excitation section is driven by an electric signal and excites the string according to the electric signal, regardless of any of the invention specific items (a) to (d). By supplying various sounds, such as any musical instruments that are easy to play, to the string excitation unit as audio electrical signals, even those who do not have the performance skills can produce various sounds such as voices and any musical instruments that are easy to play. It can be used to enjoy the sound produced by the stringed instrument according to the invention. This is an operation effect that cannot be predicted from Patent Document 4 requiring a player. In addition, it is possible to easily and sufficiently generate a sound, a reverberation sound, or a continuous sound to which a high-order harmonic component is added.

  When satisfying the invention specific items (a) to (c), the bridge has a first support point and a surface which is closer to the second support point than the first support point and which is in contact with the string when the string vibrates. Therefore, if the excitation frequency from the string excitation unit matches or is close to the natural resonance frequency of the string or its overtone frequency, the string resonates with the excitation frequency from the string excitation unit and vibrates, The string makes complicated contact with the surface of the bridge due to the vibration, and resonates the string vibration with resonance to which high-order harmonic components of various orders are added. Therefore, even a person who does not have the performance technique can enjoy a resonance sound to which a higher harmonic component is added, similar to the sitar of the Indian classical musical instrument. Note that the vibration frequency of the string is determined by the string length, tension, linear density, and the like.

  When satisfying the invention specific matter (b), the string, the string excitation section, and the bridge are arranged in the internal space of the body section, so that there is no danger of being injured by touching a sharp portion of the end of the string, and the string is not damaged. When it breaks, there is no risk of injury from the broken strings. In addition, there is obtained an advantage that care of the body portion is facilitated.

  Further, when satisfying the invention specific matter (d), the bridge has the first support point, but does not have a portion on the second support point side of the first support point where the string contacts when the string vibrates. It is possible to enjoy the reverberation sound due to the string vibration sound generated in the string in resonance with various excitation frequencies given by the string excitation section.

  In addition, since the strings, the string excitation section and the bridge are arranged in the internal space of the body section, there is no danger of injury by touching the sharp end of the string, and when the string breaks, the string pops. The risk of injury from the strings is eliminated. In addition, there is obtained an advantage that care of the body portion is facilitated.

  Further, in the stringed musical instrument according to the present invention, the string excitation unit may include a converter together with the exciter. The exciter is provided for each single string of the string and individually excites the single string. The converter is provided for each single string of the strings, and converts the vibration into an electric signal.

  In this type of stringed instrument, when a slight vibration occurs in a single string of strings, the vibration is detected by a converter and converted into an electric signal by the converter. The electric signal is fed back to an exciter provided on the single string via the amplifier circuit and the like. The exciter excites the single string with the feedback signal. Thus, a positive feedback type oscillation circuit is formed.

  According to the oscillating circuit described above, even when the string is not ringing, positive feedback occurs using the noise or the like occurring in the positive feedback loop as a trigger signal, and starts oscillating at the natural resonance frequency of the string or its overtone frequency. The string that has begun to vibrate grows up to a certain amplitude, so that the sound of the string vibrates so as to be excited. When it grows to a certain amplitude and reaches a stable state, the string vibration is sustained in the stable state. When the operation stops, the string vibration attenuates and stops ringing.

  The bridge is the structure specified in the invention specifying items (a) to (c), that is, the first support point, and the surface on the second support point side of the first support point, where the string contacts when the string vibrates. In this case, a continuous sound in which a higher harmonic component is added to the vibration sound determined by the oscillation frequency of the oscillation circuit is generated. The bridge has the structure specified in the item (d) of the invention, that is, the first support point, but does not have a portion on the second support point side of the first support point where the string contacts when the string vibrates. In the case of a structure, a continuous sound is generated by string vibration. In addition, you may combine the stringed instruments which have invention specific matter (a)-(d).

  In the present invention, the string excitation unit includes an electromagnetic coil, a piezoelectric vibrator, a magnetostrictive vibrator, a giant magnetostrictive vibrator, a voice coil type exciter, a speaker, and the like. These can be substituted for each other as long as they do not contradict their properties. Accordingly, in the various embodiments described below, one illustrated embodiment should be construed as suggesting other exciter configurations not illustrated. Further, the converter is preferably constituted by a non-contact vibration detection sensor. One preferred example is an electromagnetic coil.

As described above, according to the present invention, the following effects can be obtained.
(A) It is possible to provide a stringed instrument capable of enjoying a sound to which a higher-order harmonic component is added, a reverberant sound, a sustained sound, and the like, even if the person has no playing technique.
(B) It is possible to provide a stringed instrument capable of easily and sufficiently generating a sound, reverberation sound, or sustained sound to which a high-order harmonic component is added.
(C) A highly safe stringed instrument can be provided.

  Other objects, configurations and advantages of the present invention will be described in more detail with reference to the accompanying drawings. The accompanying drawings are merely illustrative.

1 is an external perspective view of a stringed musical instrument according to the present invention. FIG. 2 is a perspective view of the stringed instrument shown in FIG. 1 as viewed from the back side. FIG. 3 is a perspective view of the stringed instrument shown in FIGS. 1 and 2 with a back plate removed. FIG. 4 is an enlarged view showing a bridge portion in the state shown in FIG. 3. FIG. 5 is a diagram illustrating a relationship between a bridge and a string illustrated in FIG. 4. FIG. 7 is a perspective view showing another example of the stringed instrument according to the present invention, with the back plate removed. FIG. 7 is an enlarged view showing a bridge portion of the stringed instrument shown in FIG. 6. It is a figure showing other examples of the bridge used for the stringed instrument concerning the present invention. It is a figure showing a string excitation part in another example of a stringed instrument according to the present invention. It is an external appearance perspective view which shows another Example of the stringed musical instrument which concerns on this invention. FIG. 11 is a perspective view of the stringed instrument shown in FIG. 10 viewed from the back side, with the back plate removed. FIG. 12 is a perspective view showing the stringed instrument shown in FIGS. 10 and 11 cut at an arbitrary position in a longitudinal direction. It is an external appearance perspective view which shows another Example of the stringed instrument which concerns on this invention. FIG. 14 is an enlarged perspective view showing a string excitation unit of the stringed instrument shown in FIG. 13. FIG. 7 is a perspective view showing another example of the stringed instrument according to the present invention, with the back plate removed. FIG. 16 is an enlarged perspective view showing a string excitation unit of the stringed instrument shown in FIG. 15, with a side plate removed. It is a figure which shows the string excitation part and bridge part in another Example of the stringed musical instrument which concerns on this invention. FIG. 18 is an enlarged view showing a string excitation unit and a bridge shown in FIG. 17. It is the perspective view which expands and shows another example of the string excitation part of a stringed instrument, omitting the side plate. FIG. 20 is a perspective view of the state of the string excitation unit shown in FIG. 19 as viewed from above. It is an external appearance perspective view which expands and shows the string excitation part in further another Example of the stringed instrument which concerns on this invention. FIG. 22 is a cross-sectional view illustrating an example of an exciter (voice coil) suitable for configuring the string excitation unit in FIG. 21. It is sectional drawing which shows another example of the exciter (voice coil) which comprises a string excitation part. It is a perspective view which shows the further another Example of the stringed instrument which concerns on this invention, omitting a side plate. FIG. 11 is a perspective view showing still another embodiment of the stringed instrument according to the present invention. It is an external appearance perspective view which shows another Example of the stringed instrument which concerns on this invention. FIG. 27 is a perspective view showing the stringed instrument shown in FIG. 26 with its back plate removed. FIG. 28 is an enlarged perspective view showing a string excitation unit of the stringed instrument shown in FIG. 27. It is an external appearance perspective view which shows another Example of the stringed instrument which concerns on this invention. FIG. 30 is a perspective view showing the stringed instrument shown in FIG. 29 with a back plate removed. FIG. 8 is a perspective view showing another embodiment of the stringed instrument according to the present invention, with a back plate removed. FIG. 32 is an enlarged perspective view showing a bridge state of the stringed instrument shown in FIG. 31. FIG. 33 is a diagram showing a relationship between the bridge shown in FIG. 32 and strings. FIG. 9 is a perspective view of a stringed instrument according to another embodiment of the present invention, with a back plate removed. FIG. 35 is an enlarged perspective view showing an excitation / pickup structure of the stringed instrument shown in FIG. 34. FIG. 36 is a diagram of the excitation / pickup structure shown in FIG. 35 as viewed from the side. FIG. 34 is a block diagram illustrating a stringed musical instrument and an electronic circuit illustrated in FIGS. 1 to 33 and a flow of acoustic information thereof. FIG. 38 is a block diagram showing a stringed instrument and an external electric / electronic circuit shown in FIG. 37, and a flow of acoustic information. FIG. 37 is a block diagram illustrating a stringed musical instrument and an electronic circuit illustrated in FIGS. 34 to 36 and a flow of acoustic information thereof. FIG. 40 is a block diagram illustrating a stringed instrument and an external electric / electronic circuit illustrated in FIG. 39, and a flow of acoustic information thereof. FIG. 40 is a diagram extracting and showing a part of the electronic circuit shown in FIG. 39.

  1 to 41, parts corresponding to each other are denoted by the same reference numerals, and redundant description may be omitted. FIGS. 1 to 30 show examples of a stringed musical instrument (referred to as a first type) using a Javanese bridge, and FIGS. 31 to 33 show examples of a stringed musical instrument without a Javanese bridge (second type). 34 to 36 show examples of a stringed instrument (third type) using an oscillation circuit.

1. First Type Regarding the first type, first, referring to FIGS. 1 to 5, the illustrated stringed instrument includes a body portion 1, a plurality of strings 3, a string excitation portion 5, and a bridge 7. The body 1 has an internal space 100, a front plate 101, a rear plate 102, and four side plates 103 to 106 that define the internal space 100. However, it is not always necessary to provide the internal space 100 and all of the back plate 102 and the side plates 103 to 106 that define the internal space 100.

  The surface plates 101 to 106 that define the internal space 100 are generally made of wood, but may be partially or entirely made of a metal, a nonmetal, or a composite material combining those materials. The non-metallic material includes a synthetic fiber such as carbon graphite and glass fiber, a synthetic resin, or a composite material thereof. A laminate plate or the like of these materials can also be used.

  The body 1 is hexahedral in this embodiment, but is not limited to this. The shape may be a flat plate having no internal space 100, or the outer shape may be another shape including a curved surface or the like. Further, the body portion 1 has a small thickness suitable for enhancing the acoustic effect in a certain portion, and the other portion is subjected to processing such as increasing the thickness and increasing the mechanical strength. However, in the case where the vibration generated in the string 3 is amplified by an electric or electronic circuit without relying on the sound generated from the stringed musical instrument itself and is output to the outside, the body 1 is not provided with a thin portion. The structure may be made thicker as a whole to give priority to mechanical strength. This structure is also effective when the body portion 1 has a structure that is hardly affected by external sound pressure.

  A small window 154 is opened in the surface plate 101 among the surface plates 101 to 106. A tuning peg 9 is arranged at an end of the face plate 101. The tuning peg 9 is attached so as to penetrate the face plate 101, and knobs of the pegs 901 to 912 are arranged outside the face plate 101. In the embodiment, since the small window 154 is provided on the surface plate 101, tuning can be performed using the tuning pegs 901 to 912 through the small window 154 while ringing each string with a fingertip. The pegs 901 to 912 are provided according to the number of the strings 3. Therefore, if the number of strings 3 changes, the number of pegs 901 to 912 also changes. In this embodiment, since twelve single strings 301 to 312 are provided, twelve pegs 901 to 912 are provided.

  On the outer surface of the back plate 102 facing the front plate 101, three legs 151 to 153 that stand at three vertices of a triangle are provided upright. By supporting the body 1 with these three legs 151 to 153, even if the installation surface is distorted, all the legs 151 to 153 are always in contact with and supported by the installation surface.

  Of the four side plates 103 to 106, the side plate 105 includes a power switch / input volume pot 121, an original volume pot 122, an output volume pot 123, an input jack 131, an output jack 132, A jack 133 is provided. In addition to a structure in which power is supplied from the power jack 133, a structure in which a battery is built in, a structure in which a battery that can be charged from the power jack 133 is built, and the like can also be adopted.

  The string 3, the string excitation section 5, and the bridge 7 are arranged in the internal space 100 of the body section 1. First, the string 3 has twelve single strings 301 to 312 arranged in parallel at an interval. Therefore, in addition to being able to tune to each of the 12-tone equal-tempered notes, it is also possible to tune to a specific pitch by setting a plurality of strings to the same pitch for a characteristic pitch in the pitch. In addition, it is possible to tune to an arbitrary tone composed of a differential pitch. However, the number of single strings 301 to 312 can be increased or decreased.

  The string 3 shown in the example is a magnetic metal wire, but a non-magnetic wire may be used depending on the embodiment. One end of each of the single strings 301 to 312 of the chord 3 is fixed on one side of the side plate 106 by a tailpiece 142 provided on the inner surface of the surface plate 101, and faces the side plate 106 along the inner surface of the surface plate 101. It is guided in the direction of the side plate 105. The tail piece 142 is fixed to a mounting portion 141 formed on the inner surface of the surface plate 101 by a screw 143 or the like (see FIG. 4). Each of the single strings 301 to 312 of the string 3 is further hung on pins 161 to 172 erected on the inner surface of the surface plate 101, and the other end of the peg 901 penetrates from the surface side of the surface plate 101 to the inner surface side. To 912 winding shafts 921 to 932. In the embodiment, the positions of the pins 161 to 172 with respect to the single strings 301 to 312 of the strings 3 are made different from each other, thereby making the string lengths different, thereby covering a wide sound range. The tone range can be adjusted not only by the chord length but also by the tension and the linear density.

  A bridge 7 and a string excitation unit 5 are further provided in the internal space 100 of the body unit 1. Details of the bridge 7 are shown in FIGS. In the present invention, such a bridge 7 is referred to as a Java bridge. As shown in these figures, the surface 71 in contact with the string 3 of the Javali bridge 7 is a convex curved surface that is slightly curved. The string 3 is supported by the Javary bridge 7 so as to make a sound to which a higher harmonic component is added sound.

  In the embodiment, the chord length of each of the single chord lines 301 to 312 is such that a contact point with the surface 71 which is a convex curved surface is a first support point P1 and a contact point with the pins 161 to 172 is a second support point P21 to P32. (See FIGS. 3 to 5). The first support point P1 is determined by the inclination angle of the single chord lines 301 to 312 with respect to the surface 71, and does not necessarily coincide with the single chord lines 301 to 312, but is described as being coincident for the sake of simplicity. I do. In addition, the inclination angles of the single chord lines 301 to 312 can be controlled by controlling the chord support height at the second support points P21 to P32.

  The second support points P21 to P32 are different from each other. Since the surface 71 of the Javanese bridge 7 is a convex curved surface, the surface of the surface 71 that is closer to the second support points P21 to P32 than the first support point P1 has a small interval with respect to the chord 3. When the strings 3 vibrate, they face each other when the strings 3 vibrate.

  The minute spacing generated between the string 3 and the surface on the side of the second support points P21 to P32 with respect to the first support point P1 has an important influence on the contact of the string 3 and the vibration characteristics of the string 3 due to the contact. Therefore, it is extremely useful to provide a means for adjusting the minute interval and adjusting the vibration characteristics of the string 3. 6 and 7 show an example of the adjusting means. In this embodiment, an adjusting tool 75 made of a thin wire, for example, an organic yarn, an inorganic yarn, or a composite yarn thereof is interposed between the single chord wires 301 to 312 and the surface 71, and the first The support point P1 and a minute interval generated in front of the support point P1 are adjusted. Each of the adjusting tools 75 is individually provided for each of the single strings of strings 301 to 312, and is moved in the length direction for each of the single strings of strings 301 to 312 to adjust the minute interval. Generally, the position of the adjustment tool 75 is the first support point P1.

  Surface 71 need not be a convex surface. For example, as shown in FIG. 8, a simple inclined surface may be used. The first support point P1 may be formed by bringing the string 3 into contact with the tip of the inclined surface.

  The bridge 7 is supported by a plurality of columns 72 erected on bracings 73 provided on the inner surface of the face plate 101. The portion of the surface plate 101 where the bridge 7 is arranged is preferably thinner from the viewpoint of enhancing the acoustic effect. The bracing 73 is a means for compensating for a decrease in mechanical strength due to the reduction in thickness. On the other hand, the area where the pins 161 to 172 are erected is made thick to increase the mounting strength to the pins 161 to 172. In the embodiment, a thickness change portion is set at a substantially middle portion in the longitudinal direction of the surface plate 101. As already described, when the vibration generated in the string 3 is output to the outside by amplifying it by an electric or electronic circuit, or the body 1 is made to have a structure that is hardly affected by sound pressure from the outside. In this case, the body portion 1 may be made thicker as a whole without providing a thin portion.

  The string excitation unit 5 is driven by an externally supplied electric signal, excites the string 3 according to the electric signal, and has an exciter 51. The exciter 51 is attached to the inner surface of the surface plate 101 of the body 1 as shown in FIG. The exciter 51 shown in the embodiment is a magnetic driver (electromagnetic driver) including an electromagnetic coil, and is arranged at a position where a line of magnetic force acts directly on the string 3 made of a magnetic metal wire, and is generated in accordance with an input signal. The string 3 is excited by the action of the lines of magnetic force. More specifically, a support portion 52 is provided on the inner surface of the surface plate 101 at an intermediate position of the string 3 from the Javanese bridge 7 to the pins 161 to 172, and an exciter 51 composed of an electromagnetic coil is provided on the support portion 52. Is fixed by means of, for example, screws. The electromagnetic coil constituting the exciter 51 has a well-known structure in which a coil is wound around a core, and emits lines of magnetic force from an end face of the core. In addition, the exciter 51 may be arranged obliquely with respect to the direction of the string 3 in order to match the ratio of the place of excitation to the chord length.

  The exciter 51 of the string excitation unit 5 is arranged so as to be close to the vibrating string 3 so as not to contact the vibrating string 3. This is to make the lines of magnetic force act on the strings 3 as efficiently as possible. When a magnetic field line is radiated to a magnetic material other than the string 3, the original sound reverberates. By radiating the lines of magnetic force efficiently and directly to the strings 3, the strings 3 can be excited without generating the input original sound from the string excitation section 5. Power consumption is also reduced.

  A piezo pick-up 17 using a piezoelectric element is installed on the inner surface of the surface plate 101 of the body portion 1. The piezo pick-up 17 can pick up vibration of the surface plate 101 of the body 1. In this embodiment, the piezo pick-up 17 is disposed immediately below the Javanese bridge 7. However, the piezo pick-up 17 may be located at a position where the vibration of the surface plate 101 of the body part 1 can be picked up. Not done. For example, it can be installed in the bridge 7 or built in the bridge 7.

  The built-in microphone 18 is installed on the side plate 104 of the body 1 toward the outside of the body 1. For the built-in microphone 18 (see FIGS. 1 and 2), a small unidirectional microphone is preferably used.

  As described above, the stringed musical instrument illustrated in FIGS. 1 to 5 includes the body part 1, the plurality of strings 3, and the bridge 7, the string 3 is supported by the body part 1, and the string 3 Since the bridge 7 supported at the first support point P1 is also supported by the body portion 1, the chord length, tension, linear density, etc. of the chord 3 defined by the first support point P1 and the second support points P21 to P32 are provided. A sound having a vibration frequency corresponding to the sound is generated.

  The stringed musical instrument according to the present invention further includes a string excitation unit 5, and the exciter 51 of the string excitation unit 5 is driven by an electric signal and excites the string 3 according to the electric signal. By supplying various sounds, such as an arbitrary musical instrument that is easy to play, to the string excitation unit 5 as an audio electric signal, even a person without playing skills can enjoy the sound generated from the stringed musical instrument according to the present invention. it can. It should be noted that, in light of the above description and the drawings, it is clear that the string 3 is exclusively driven by the exciter 51.

  The bridge 7 has a first support point P1 and a surface 71 that is closer to the second support points P21 to P32 than the first support point P1 and is in contact with the string 3 when the string 3 vibrates. When the string 3 resonates with an excitation signal from the exciter 51 of the string excitation unit 5 and vibrates, the string 3 comes into complex contact with the surface 71 of the bridge 7 to add a higher harmonic component to the string vibration. Resonate the sound. Therefore, even a person who does not have the performance technique can enjoy a resonance sound to which a higher harmonic component is added, similar to the sitar of the Indian classical musical instrument. In addition, since the string 3 is excited by the string excitation unit 5, it is possible to easily and sufficiently generate a resonance sound to which a higher-order harmonic component is added.

  Moreover, in the case of the embodiment shown in FIGS. 1 to 3, the string 3, the string excitation section 5 and the bridge 7 are arranged in the internal space 100 of the body 1, so that the string 3 has a sharp end. In addition to eliminating the risk of injury due to touch, when the string 3 breaks, the risk of injury due to the broken string 3 is eliminated. In addition, there is obtained an advantage that care of the body portion 1 is facilitated. 5 to 8, an arrow P2 indicates a direction in which the second support points P21 to P32 are located.

  Next, in the embodiment of FIG. 9, the vibration transmitting piece 562 of the support 56 provided on the inner surface of the front plate 101 is excited by the exciter 51 composed of an electromagnetic coil, and is provided at the rising portion of the vibration transmitting piece 562. Each single string of strings 301 to 312 penetrating through hole 563 is indirectly excited. The support 56 has a fixing portion 561 fixed to the inner surface of the surface plate 101, and the vibration transmission piece 562 rises from one end of the fixing portion 561. In the support 56, at least all or a part of the portion of the vibration transmission piece 562 facing the exciter 51 formed of an electromagnetic coil is formed of a magnetic material. However, the whole of the support 56 may be made of a magnetic material.

  Next, referring to FIGS. 10 to 12, the strings 3 and the bridge 7 are arranged on the surface (outer surface) of the surface plate 101 of the body 1. The string excitation section 5 is arranged in the internal space 100 of the body section 1. The bridge 7 may be the Javabridge shown in FIGS. 4 and 5 or the Javabridge shown in FIGS. 6 to 8. The string 3 and the bridge 7 are arranged on the outer surface of the body part 1, and the electromagnetic coil of the exciter 51 constituting the string excitation part 5 is arranged in the internal space 100 of the body part 1. Therefore, the lines of magnetic force from the electromagnetic coil of the exciter 51 act on the string 3 via the surface plate 101. As shown in FIGS. 11 and 12, the string excitation section 5 is provided with a continuous support section 52 on the inner surface of the surface plate 101, and a mounting plate 53 for supporting the exciter 51 is provided on the support section 52, for example. The structure is fixed by means such as screwing.

  Also in the embodiment shown in FIGS. 10 to 12, since the bridge 7 is a Javary bridge 7 in which the surface 71 in contact with the string 3 is a convex curved surface, a high-order harmonic component similar to sitar is added. You can enjoy the resonance sound.

  Next, in the embodiment shown in FIGS. 13 and 14, the string excitation unit 5 also includes an exciter 51 formed of an electromagnetic coil, and the core end 511 serving as an operating end for the string 3 is connected to the string 3 and the bridge. 7 is exposed on the surface of the surface plate 101 having the same. Most of the electromagnetic coil that constitutes the exciter 51 is in the internal space 100 of the body 1, and only the core end 511 passes through the through hole provided in the surface plate 101 and is guided to the surface. . Therefore, the lines of magnetic force generated from the core end 511 of the electromagnetic coil constituting the exciter 51 act directly on the string 3 without the interposition of the surface plate 101 to excite the string 3.

  Next, the stringed instruments shown in FIGS. 15 and 16 will be described. A feature of the embodiment shown in FIGS. 15 and 16 is that the exciter 55 of the string excitation unit 5 is formed of a piezoelectric vibrator. The piezoelectric vibrator constituting the exciter 55 has a structure in which the periphery of a disk-shaped piezoelectric substrate 551 is bordered by a ring 552 serving as a weight. Vibration is taken out. However, the piezoelectric vibrator constituting the exciter 55 is not limited to the illustrated one.

  The exciter 55 is supported by a support 56 fixed to the inner surface of the surface plate 101. The support 56 can be made of an inorganic material such as a metal, an organic material containing a synthetic resin or the like, or a combination thereof. The support 56 includes a fixing portion 561 fixed to the inner surface of the surface plate 101, and a vibration transmission piece 562 rising from one end of the fixing portion 561. One end of a vibration bar 553 of a piezoelectric vibrator constituting the exciter 55 is coupled to the vibration transmission piece 562. Further, a through hole 563 is formed in a rising portion of the vibration transmission piece 562 so as to pass each of the single strings 301 to 312 of the strings 3.

  Each single string of strings 301 to 312 of the string 3 penetrating the through hole 563 is divided into two groups, and the single strings of strings 301 to 306 are guided in the direction of the side plate 104 and wound around the winding shafts 921 to 926 to be fixed. Then, the single strings of strings 307 to 312 are guided in the direction of the side plate 103 and are wound around and fixed to the winding shafts 927 to 932.

  According to the embodiment shown in FIGS. 15 and 16, when the exciter 55 composed of the piezoelectric vibrator is driven by an electric signal, the electrostrictive vibration generated in the piezoelectric vibrator of the exciter 55 is generated from the vibration bar 553. The vibration is transmitted to the vibration transmitting piece 562. Then, each of the single strings 301 to 312 of the strings 3 passing through the through hole 563 provided at the rising portion of the vibration transmission piece 562 is excited by the vibration transmission piece 562. The first support point P1 for the string 3 is on the surface 71 of the bridge 7, and the second support point P2 is set by the position of the through hole 563 provided at the rising portion of the vibration transmission piece 562.

  The embodiment shown in FIGS. 15 and 16 is the same as that shown in FIGS. 1 to 5 except that the electromagnetic coil of the embodiment shown in FIGS. 1 to 5 is replaced with a piezoelectric vibrator. It is a structure and has the same effect.

  Next, FIGS. 17 and 18 are common to FIGS. 15 and 16 in that the exciter 55 of the string excitation unit 5 is configured by a piezoelectric vibrator. , The bridge 7 is excited, and the strings 3 are excited via the vibration of the bridge 7. Although not shown, the surface plate 101 of the body 1 may be excited by the piezoelectric vibration constituting the exciter 55, and the strings 3 may be indirectly excited via the vibration of the body 1. In FIG. 18, an arrow P2 indicates a direction in which the second support points P21 to P32 are located.

  In the embodiment of FIGS. 19 and 20, the string excitation unit 5 includes an exciter 55 composed of a piezoelectric vibrator. It is exposed on the surface of the surface plate 101 having the bridge 7. The exciter 55 and the support body 56 that constitute the string excitation unit 5 have the structure described with reference to FIG. 16, and most of the exciter 55 and the support body 56 are located on the inner surface side opposite to the surface where the strings 3 and the bridge 7 are provided. In the internal space 100 of the body part 1, only the end of the vibration transmission piece 562 penetrates through holes 564 (see FIG. 20) provided in the surface plate 101 and is guided to the surface. Then, the string 3 passing through the through hole 563 is excited by the vibration of the vibration transmitting piece 562 driven by the exciter 55.

  15 to 20, in the exciter 55, an electromagnetic coil may be used instead of the piezoelectric vibrator, or a magnetostrictive vibrator or a giant magnetostrictive vibrator may be used. When an electromagnetic coil is used, the entire support 56 may be made of a magnetic material, as shown in the embodiment shown in FIG. At least, all or a part of the portion of the exciter 55 facing the electromagnetic coil may be made of a magnetic material. When a magnetostrictive vibrator or a giant magnetostrictive vibrator is used, the support 56 does not need to be a magnetic material, and may be formed of an inorganic material such as a metal, an organic material including a synthetic resin, or a combination thereof. Can be.

  Next, in the embodiment of FIG. 21, the vibration transmitting piece 562 of the support body 56 provided on the inner surface of the front plate 101 is excited by the exciter 60, and the through hole 563 provided at the rising portion of the vibration transmitting piece 562 is formed. The penetrating single strings 301 to 312 are indirectly excited. The support 56 does not need to be a magnetic material, and can be formed of an inorganic material such as a metal, an organic material including a synthetic resin, or a combination thereof.

  FIGS. 22 and 23 are diagrams illustrating a specific structure of the exciter 60. FIG. These are all voice coil type exciters. First, an exciter 60 shown in FIG. 22 has a ring-shaped second yoke 603 disposed on a cylindrical end surface of a cap-shaped first yoke 601, and a distal end surface of a permanent magnet 602 disposed at the center of the first yoke 601. A third yoke 606 is disposed in the gap, and a coil 604 is disposed in a gap generated between the third yoke 606 and the second yoke 603. A damper 605 made of an elastic material is provided below the second yoke 603, and the side of the damper 605 is attached to a mounting plate 607.

  In the embodiment of FIG. 21, the exciter 60 shown in FIG. 22 is used, and the mounting plate 607 is mounted on the vibration transmitting piece 562 by means such as a screw 608.

  The voice coil exciter 60 shown in FIG. 23 has a ring-shaped magnet 602 sandwiched between a first yoke 601 and a ring-shaped second yoke 603. The first yoke 601 has a center yoke portion located in the center holes of the ring-shaped magnet 602 and the ring-shaped second yoke 603, and is generated between the inner surface of the ring-shaped second yoke 603 and the first yoke 601. The coil 604 is arranged in a ring-shaped gap. A damper 605 is arranged between the second yoke 603 and the support. However, the voice coil type exciter 60 is not limited to the structure shown in FIGS. 22 and 23, and various types can be used.

  Further, FIG. 24 shows the embodiment shown in FIGS. 19 and 20, in which the string excitation unit 5 is constituted by a voice coil type exciter 60 instead of a piezoelectric vibrator. The string 3 is excited by the vibration of the vibration transmission piece 562 driven by the string.

  FIG. 25 shows an example in which, for example, the surface plate 101 of the body part 1 is excited by the string excitation part 5 constituted by the voice coil type exciter 60, and the strings are indirectly excited by the vibration of the body part 1. ing.

  Next, in the embodiment of FIGS. 26 to 28, the speaker 600 is disposed in the internal space 100 of the body 1 so as to face the string 3, and the sound pressure of the speaker 600 causes the internal space 100 of the body 1. The stretched string 3 is excited. A sound hole 111 is provided in the front plate 101 at a position facing the speaker 600. The speaker 600 is mounted on a support 57 provided on the inner surface of the surface plate 101.

  Next, in the embodiment shown in FIGS. 29 and 30, the bridge 7 is located on the side of the second support points P21 to P32 with respect to the first support point P1 together with the first support point P1, and the vibration of the string 3 Sometimes it has a surface 71 with which the string 3 contacts. The speaker 600 is arranged in the internal space 100 of the body 1 so as to face the string 3, and the sound pressure of the speaker 600 excites the string 3 extended on the outer surface of the surface plate 101 of the body 1. ing. A sound hole 111 is provided in the front plate 101 at a position facing the speaker 600. The speaker 600 is mounted on a support 57 that forms a part of the inner surface of the surface plate 101 (see FIG. 30).

  Also in the embodiment of FIGS. 9 to 30, the bridge 7 is a Javali bridge 7 in which the surface 71 in contact with the string 3 is a convex curved surface. The user can enjoy the resonance to which the next harmonic component is added.

2. Second type In the embodiment of FIGS. 31 to 33, the bridge 7 has only the first support point P1, and the contact of the chord 3 is closer to the second support point P2 than the first support point P1. Have no side to do. As long as this condition is satisfied, the end face of the bridge 7 can take an arbitrary shape such as a blade shape, a flat shape, a curved surface shape, or the like. The bridge 7 is mounted on a support base 75, and the support base 75 is attached to a bracing 73 provided on the inner surface of the surface plate 101 by a support column 72.

  When the bridge 7 having the above-described configuration is used, the first support point P1 supports each of the single chord lines 301 to 312, and the vibration of the string 3 is closer to the second support point P2 than the first support point P1. Occasionally, there is no portion where the string 3 comes into contact, so that it is possible to enjoy the reverberation sound generated on the string 3 in resonance with the excitation frequency given from the string excitation section 5. Further, since the string 3 is excited by the string excitation section 5, the above-described reverberation can be easily and sufficiently generated.

  In addition, since the string 3, the string excitation section 5 and the bridge 7 are arranged in the internal space 100 of the body section 1, there is no danger of touching the sharp end of the string 3 and injuring it. There is no danger of injury from the broken string 3 when it breaks. In addition, there is obtained an advantage that care of the body portion 1 is facilitated.

3. Third Type In the embodiment shown in FIGS. 34 to 36, an exciter and a converter for converting the vibration of the exciter into an electric signal are provided for each of the single strings 301 to 304 of the string 3. Specifically, the first exciter 211, the second exciter 232, and the third exciter 213 are provided for each of the single strings 301 to 304 of the chord 3 arranged on the inner surface of the surface plate 101 of the body portion 1. And the fourth exciter 234 are arranged to face each other. The first converter 221 is opposed to the single string 301 of the first exciter 211 facing the string, the second converter 242 is opposed to the single string 302 of the second exciter 232 opposed to the string, and the third transducer 213 is opposed to the third transducer 213. The third converter 223 faces the single string 303 and the fourth converter 244 faces the single string 304 of the fourth exciter 234. Each of the first to fourth exciters 211 to 234 and the first to fourth converters 221 to 244 is an electromagnetic coil.

  In the illustrated example, the first exciter 211, the third exciter 213, the first converter 221, and the third converter 223 are mounted on one surface of one support 215 to form the first assembly 21. The support 215 of the first assembly 21 is attached to attachment portions 571 and 572 erected on the inner surface of the surface plate 101 along the inner surfaces of the side plates 103 and 104. Similarly, the second exciter 232, the fourth exciter 234, the second converter 242, and the fourth converter 244 are mounted on one surface of one support stand 235 to form the second assembly 23. (2) A structure in which the support stand 235 of the second assembly 23 is attached to attachment portions 571 and 572 erected on the inner surface of the surface plate 101 along the inner surfaces of the side plates 103 and 104 at a distance from the first assembly 21. Has become.

  The pins 161 to 164 are all provided at the same position when viewed in the length direction of the string 3, and all the single strings 301 to 304 of the string 3 have the same chord length. In this case, a wide sound range can be covered by changing the tension, line density, and the like of each of the single strings 301 to 304 in a stepwise manner.

  The operation of the stringed instrument according to the embodiment shown in FIGS. 34 to 36 will be described later in detail with reference to FIGS.

4. Circuit / Acoustic Information System The circuit / acoustic information system of the stringed instrument according to the present invention includes the circuit / acoustic information system shown in FIGS. 37 to 38 directed to the stringed instrument shown in FIGS. 39, which are directed to the stringed musical instrument shown in FIG. 37 to 41, the lines with dotted arrows indicate sound / sound pressure propagation.

(1) Circuit / Acoustic Information System of FIGS. 37 to 38 FIG. 37 is a block diagram showing the flow of acoustic information together with the stringed musical instrument and its electric / electronic circuit shown in FIGS. 1 to 33, and FIG. FIG. 3 is a block diagram showing a flow of acoustic information together with an electric / electronic circuit between the two. In the figure, reference symbol A indicates a stringed instrument according to the present invention, reference symbol B indicates an external input device or input signal, and reference symbol C indicates external sound. FIGS. 37 and 38 can be integrated as one figure, but are shown in two parts due to space limitations. Hereinafter, description will be made with reference to FIGS. 1 to 33 as needed, in conjunction with FIGS. 37 and 38. The only difference is that the stringed musical instruments of FIGS. 1 to 30 resonate the resonance to which the higher harmonic components are added, while the stringed instruments of FIGS. 31 to 33 reverberate. Therefore, for simplicity of description, the focus will mainly be on the stringed instruments of FIGS. Those skilled in the art can easily understand the musical instruments of FIGS. 31 to 33 from the description of the string musical instruments of FIGS. 1 to 30.

  First, a sound 40 such as a musical instrument sound or a voice played outside is picked up by the built-in microphone 18. The sound 40 of a musical instrument having a built-in microphone or pickup 41 can be input by using the built-in microphone 18 or by inputting acoustic information from the input jack 131. An electric musical instrument 42 such as an electric guitar or an electronic piano inputs acoustic information from an input jack 131. In addition, audio information 43 from a music player or a personal computer can also input acoustic information from the input jack 131.

  An external audio signal and a signal from the built-in microphone 18 are selected by an input selector 801 incorporated in the input jack 131. When a plug for transmitting an external audio signal is connected to the input jack 131, the audio signal from the input jack 131 is selected. On the other hand, if a plug for transmitting an external audio signal is not connected to the input jack 131, a signal from the built-in microphone 18 is selected. The input volume of the audio signal from the input device selected by the input selector 801 is adjusted by the input volume 802. The audio signal whose volume has been adjusted by the input volume 802 is amplified by the built-in amplifier 803.

  The audio signal amplified by the built-in amplifier 803 is supplied to the string excitation unit 5. Then, the string 3 is vibrated by the string excitation unit 5. When the bridge 7 is a Javary bridge (FIGS. 1 to 30), the vibrated string 3 comes into contact with a plurality of points on the surface 71 of the bridge 7 so that the resonance to which the higher harmonic component is added is added. Resonate the sound. That is, when the string 3 resonates with the excitation signal from the string excitation unit 5 and vibrates, the string 3 comes into complex contact with the surface 71 of the bridge 7, so that higher-order harmonic components of various orders become string vibrations. The resonance to which the added higher harmonic component is added is resonated. Therefore, even a person who does not have the performance technique can enjoy the resonance to which the higher harmonic component is added. In addition, since the string 3 is excited by the string excitation unit 5, it is possible to easily and sufficiently generate a resonance sound to which a higher-order harmonic component is added.

  In the case of the structure shown in FIGS. 31 to 33, the bridge 7 has the first support point P1, but the strings 3 are closer to the second support points (P21 to P32) than the first support point P1. Since the structure does not have a portion where the string 3 comes into contact with the vibration of the string, even those who do not have a playing technique can enjoy the reverberation sound generated on the string 3 in resonance with the various excitation frequencies given by the string excitation section 5. Can be. Further, since the string 3 is excited by the string excitation section 5, the above-described reverberation can be easily and sufficiently generated.

  The vibrating sound of the string 3 is transmitted to the surface plate 101 and the body 1 and emitted as an acoustic sound 62, picked up by the piezo pickup 808, further adjusted by the output volume 810, and output from the output jack 132. You.

  The sound signal of the original sound branched from the input selector 801 is adjusted on / off and the volume by the original volume 816, and is output from the output jack 132 when the sound signal is on.

  The audio signal output from the output jack 132 is emitted as an amplified sound 63 through an external amplifier 812 and speaker 813. Alternatively, it is directly recorded on the external recording device 814.

  As a result of the transmission of the acoustic information, when a sound 40 such as a musical instrument sound or a voice is emitted, the original sound 61 is resonated, and at the same time, the acoustic sound 62 of the resonance sounds in response to the sound. When the external amplifier 812 and the speaker 813 are provided, the amplified sound 63 in which the original sound and the resonance sound to which the higher harmonic component is added (the reverberation sound in FIGS. 31 to 33) is mixed. Resounds. At this time, the mixing ratio can be freely adjusted by adjusting the original volume 816 and the output volume 810, and only the original sound or the resonance to which the higher harmonic component is added (FIGS. 31 to 31). Only the reverberation sound in the case of FIG. 33) can be resonated as the amplified sound 63.

  When an electric instrument 42 such as an electric guitar or an electronic piano is played, or a recorded sound source is played back from a music player or a personal computer 43, the original sound is provided if an external amplifier 812 and a speaker 813 are installed. An amplified sound 63 that is a mixture of a resonance sound to which a higher-order harmonic component is added (a reverberation sound in the case of FIGS. 31 to 33) sounds. At this time, the mixing ratio can be freely adjusted by adjusting the original volume 816 and the output volume 810, and only the original sound or the resonance to which the higher harmonic component is added (FIGS. 31 to 31). Only the reverberation sound in the case of FIG. 33) can be resonated as the amplified sound 63. Further, the volume of the amplified sound 63 of only the original sound is adjusted so that the amplified sound 63 can be resonated with the acoustic sound 62 of the resonance sound (the reverberation sound in FIGS. 31 to 33) to which the higher harmonic components are added, or It is also possible to make only the acoustic sound 62 of the resonance sound (the reverberation sound in the case of FIGS. 31 to 33) added with the harmonic component sound. These can also be recorded on the external recording device 814.

(2) Circuit / Acoustic Information System of FIGS. 39 to 41 FIGS. 39 and 40 are block diagrams mainly showing the flow of acoustic information together with the stringed musical instruments shown in FIGS. 34 to 36 and their electric / electronic circuits. . Although FIGS. 39 and 40 can be integrated as one figure, they are shown in two parts because of space limitations. In FIGS. 39 and 40, particularly, only portions related to the flow of acoustic information of the stringed musical instruments of FIGS. 34 to 36 are extracted and shown. In FIGS. 39 and 40, portions corresponding to the portions shown in FIGS. 37 and 38 are denoted by the same reference numerals, and redundant description will be omitted.

  Referring to FIGS. 34 to 36 together with FIGS. 39 and 40, signals from the first converter 221 to the fourth converter 244 independently directed to the single strings 301 to 304 are converted to the same single strings of strings. Through a built-in amplifier 827 that is independently prepared for the first string and sent to the first to fourth exciters 211 to 234 that are independently directed to the same string. The above circuit constitutes a positive feedback oscillation circuit that vibrates the string 3 → a magnetic pickup (a converter using an electromagnetic coil) → a built-in amplifier 827 → a magnetic driver (an exciter using an electromagnetic coil) → excites the string 3. I do.

  According to the oscillation circuit described above, even when the string 3 is not sounding, positive feedback occurs using noise or the like occurring in the positive feedback loop as a trigger signal, and among the single strings 301 to 304 included in the string 3, The corresponding solid string begins to vibrate at its resonant frequency. The string 3 that has begun to vibrate grows to a certain amplitude, so that the sound of the string vibration echoes up. When it grows to a certain amplitude and reaches a stable state, the string vibration is sustained in the stable state. When the operation stops, the string vibration attenuates and stops ringing.

  At this time, as shown in FIG. 34 to FIG. 36, when the string 3 is supported by the Javali bridge 7, the sound with the higher harmonic component added is raised so as to rise, and then the higher harmonic is added. The continuous sound to which the harmonic component has been added can continue to resonate. When the operation is stopped, the sound to which the high-order harmonic component is added starts to attenuate naturally, and then stops sounding.

  As described above, according to the stringed musical instruments shown in FIGS. 34 to 36, even those who do not have the playing technique can easily and sufficiently generate the sustained sound to which the higher harmonic component is added, and You can enjoy the sound.

  When the string 3 is supported by the bridge 7 as shown in FIG. 33, basically the same operation is performed and a continuous sound is generated. In this case, even a person who does not have the performance technique can easily and sufficiently generate a continuous sound and enjoy the continuous sound.

  Each built-in amplifier included in built-in amplifier 827 is individually controlled by control unit 804. The control section 804 executes the operation start, the operation sequence, the signal amplification degree, the operation stop, and the operation start and operation stop cycle of the built-in amplifier 827. As a control method, an analog method is preferably used. However, the control unit 804 may be configured to include a CPU (Central Processing Unit), an MPU (Micro-Processing Unit), and the like, and the built-in amplifier 827 may be program-controlled. Regarding the setting of the built-in amplifier 827 by the control unit 804, for example, the following case can be exemplified.

(A) All of the single strings 301 to 304 or an arbitrarily selected single string is set to continuously sound.
(B) For each of the single strings 301 to 304, the operation start and operation stop timings are individually set, and the sound continues to be sounded.
(C) For each of the single strings 301 to 304, a program is set such that the operation start and operation stop appear at random, and the sound is continuously sounded.

  By making the settings described in (a) to (c) above, it is possible to keep a continuous tone in which high-order harmonic components are intricately intertwined, such as a tumbler, from a string tuned to an arbitrary pitch. In particular, according to the setting in which each of the single strings of strings 301 to 304 is continuously sounded at a constant rhythm, the sound is similar to the performance of a tamboura.

  FIG. 41 shows a specific circuit configuration of the built-in amplifier 827 and the control unit 804. Referring to the figure, the built-in amplifier 827 includes four built-in amplifiers 831 to 834 in accordance with the number of single strings 301 to 304. First, the built-in amplifier 831 amplifies the string vibration detection signal supplied from the converter 221 provided on the single string 301, and supplies the amplified signal to the exciter 211 that excites the single string 301. Each of the other built-in amplifiers 832 to 834 also amplifies each of the string vibration detection signals supplied from the converters 242, 223, and 244 provided for each of the single strings of strings 302 to 304, and converts the amplified signal to a single string of strings. It is individually supplied to each of the exciters 232, 213, and 234 that excite 302 to 304.

  In the embodiment shown in FIGS. 34 to 36, a Javary bridge is used as the bridge 7, but the present invention is not limited to this. For example, a bridge 7 having the structure shown in FIG. 33 can be used, and in this case, it is possible to enjoy a continuous sound due to string vibration as described above.

5. Modifications The stringed musical instrument according to the present invention can be further modified as follows.
(1) The stringed musical instrument shown in FIGS. 1 to 33 responds to an external sound and resonates with a resonance or reverberation to which a higher harmonic component is added. A built-in sound source and a built-in sound source control unit 819 using the sound chip of the above are mounted, and a sound signal generated from the built-in amplifier 803 is amplified by the built-in amplifier 803 and then sent to the excitation unit 5 so that a resonance sound is produced. Good.

  Accordingly, for example, a signal of a continuous sound is transmitted from the built-in sound source, and a string that can resonate with the signal resonates, so that the continuous sound can be continued to sound as an acoustic string vibration sound. In addition, while maintaining such a continuous sound of the string 3 using a signal from the built-in sound source, at the same time, using a sound from the outside, a resonance sound or a reverberation sound to which a higher harmonic component is added by a string vibration is added. You can make it sound together.

(2) In the stringed instruments shown in FIGS. 1 to 36, as shown in FIGS. 37 and 39, as means for picking up sound generated from the stringed instrument according to the present invention, other than the piezo pickup 808 using a piezoelectric vibrator, In addition, a built-in microphone 805 for internal sound, a magnetic pickup 815 using an electromagnetic coil, and the like may be installed and used. The built-in microphone 805 for internal sound captures a sound pressure generated from the vibration of the surface plate 101 and the body 1. The magnetic pickup 815 captures the vibration of the string 3. When a plurality of devices are provided as means for picking up a sound generated from the stringed instrument according to the present invention, a pickup selector 809 can be provided to select which device sends a signal to the output volume 810.

(3) In the embodiment shown in FIGS. 34 to 36, as shown in FIG. 39, even if a signal is externally supplied to the exciter 818 through the input jack 131, the input volume 802, the built-in amplifier 803, and the like. Good. According to this, while maintaining the continuous sound, it is possible to simultaneously use the sound from the outside to resonate with the resonance sound resonating with the external sound. However, as the exciter 818, the exciters 211, 213, 232, and 234 may be used as they are, or may be separately provided.

  Although illustration is omitted, the configurations shown in FIGS. 37 and 38 can be appropriately incorporated into the circuit shown in FIG. Furthermore, the strings may be combined with the stringed instruments shown in FIGS.

DESCRIPTION OF SYMBOLS 1 Body part 3 String 5 String excitation part 7 Bridge 101-106 Face plate

Claims (5)

A stringed instrument including a body, a string, and a bridge,
The body supports the string and the bridge,
The chord has a chord length determined by a distance between a first support point and a second support point,
The bridge has the first support point,
The stringed instrument further includes a tuning peg,
The peg includes a knob portion, the knob portion is disposed outside the body portion,
The body has an internal space,
The string and said bridge is arranged in the internal space of the body portion,
The stringed instrument further includes a string excitation unit,
The string excitation unit is driven by an electric signal, and provides an excitation signal corresponding to the electric signal to the string to excite the string.
String instruments. A stringed musical instrument according to claim 1, wherein
The electric signal is generated in a positive feedback oscillation circuit loop including the string excitation unit and the string.
String instruments. A stringed musical instrument according to claim 1 or 2 ,
A small window is provided in the body,
Through the small window, it is possible to ring the string with a fingertip,
String instruments. A stringed instrument including a body, a string, and a bridge,
The body supports the string and the bridge,
The chord has a chord length determined by a distance between a first support point and a second support point,
The bridge has the first support point,
The stringed instrument further includes a tuning peg,
The peg includes a knob portion, the knob portion is disposed outside the body portion,
The body has an internal space,
The string and said bridge is arranged in the internal space of the body portion,
A small window is provided in the body,
Through the small window, it is possible to ring the string with a fingertip,
String instruments. A stringed musical instrument according to claim 1 , wherein
The peg is arranged through the outer and the inner space of the body portion,
The peg includes a winding shaft,
One end of the string is wound around the winding shaft in the internal space of the body portion,
String instruments.

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