JP2020118995A - Musical instrument for generating sound from two sound boards on opposite sides of instrument - Google Patents

Abstract

To provide a stringed musical instrument in which, by connecting front and rear sound boards to each other through the interior of a guitar, sound boards including both of the front and rear sound boards of the guitar are used at the same time to generate sounds independently from each other, and generated sounds are improved.SOLUTION: The musical instrument has a hollow or semi-hollow body, front and rear surfaces, at least one sound boards 12, 14 to be either one of the front and rear surfaces of the hollow body, and a plurality of panels 80, 82 connecting the front and rear surfaces of the hollow body to each other.SELECTED DRAWING: Figure 8B

Description

This invention has a hollow or semi-hollow body, using two single soundboards spaced apart across the instrument from a single set of strings that interconnect the bridges on each soundboard, Through the inside of the hollow of the instrument, a sound is generated and controlled, a stringed instrument such as a guitar, a violin, a banjo, and two sound boards having a hollow or semi-hollow body, which are arranged apart from each other across the instrument, It relates to a method of constructing a stringed instrument in which sounds are generated and controlled through the hollow interior of the instrument using a single set of strings interconnecting bridges on each sound board.

In traditional stringed instruments with a hollow or semi-hollow body, a musical note is made by stroking or plucking the strings stretched over bridges and saddles attached to the soundboard corresponding to the structural front of the instrument. Is generated.
The sound produced by the vibrations of the strings and transmitted across the body from the bridge assembly mounted on the sound board is typically located on the structural front sound board and is typically Emitted from the sound hole of the instrument located below.

In an acoustic guitar, the hollow interior of the body forms an acoustic resonance enclosure that enhances and amplifies the sound produced by the sound board. The soundboard of an instrument is traditionally considered to be the top or front of the instrument.
The back or back of the guitar is considered to have little or no effect on the overall sound produced by the instrument, and so little attention is paid to the wood used to make the guitar rearboard. Absent.
The front and rear boards are connected to the body along the sides of the instrument, completely closing the body surrounding the inside of the hollow.

As explained above, the front board is recognized as the sound board of an acoustic guitar and is composed of expensive tonewood such as spruce and red cedar, while the rear board is generally cheaper. Composed of wood and other materials.
The front and rear boards of a conventional acoustic guitar usually have ribs inside each board so as to face the inside of the guitar, thereby increasing the structural strength of each board. However, in many cases, in the conventional acoustic guitar, the support between the front board and the rear board does not exist except for the side connecting the front board and the rear board.

According to the present invention, a sound board including both a front sound board and a rear sound board of a guitar is provided by connecting the front sound board and the rear sound board to each other through the inside of the guitar by using a set of strings. It has been discovered that they can be used simultaneously to produce sounds independently of each other, which can enhance the sound produced by a stringed instrument.

The present invention accomplishes this by using a dual bridge and saddle assembly. The dual bridge and saddle assembly includes a first saddle and bridge mounted on a front soundboard of a musical instrument and a second saddle and bridge mounted on a rear soundboard, the first bridge and The second bridges are interconnected by a set of strings through the hollow interior of the guitar. The dual bridge and saddle assembly preferably further comprises struts. The struts are connected to the first and second bridges inside the guitar to additionally provide structural support between the front and rear sound boards, and the weakness due to the presence of the dual bridge. ..

By vibrating a set of common strings extending between two soundboards, sound is transferred from both the front and rear soundboards of the instrument to the entire interior of the instrument, creating a multi-layered acoustic sound. It The intensity and frequency range of the generated sound is wider than that of other acoustic guitars in which the guitar strings are connected only to the front board. Furthermore, by coupling each sound board to a separate (pre-stage) amplifier and/or amplifier, it is possible to independently control the sound generated from each sound board, further improving the sound. ..

In the present invention, although not required, at least one of the soundboards, preferably the front soundboard, is provided with at least one conventional soundhole, in addition to the conventional soundhole, for emitting sound from the guitar independently of the soundhole. It is preferable to have one sound port. The sound port can be located around the sound hole. Furthermore, the sound port has a hollow member of a desired shape, which is a tube adapted to be inserted into an opening formed on any sound board, preferably the front sound board. It is preferable to have.

The hollow member extends from the front sound board into the hollow with a length equal to 5% to 95% of the distance between the front sound board and the rear sound board, and also has a desired size dimension, preferably An opening that goes around the geometric shape is formed so as to pass through the front sound board. By changing the extension length of the sound port to the inside of the guitar, etc., i.e., determining the desired length range based on the target sound, from among various different lengths within this desired range By selecting the desired length, the sound port can be tuned to a desired frequency range proportional to the resonant frequency of the guitar. For example, unlike the frequency spectrum of sound emanating from a sound hole, sound from a sound port can have high or/and low frequencies corresponding to the sound range of a treble or bass. This can widen the dynamic range of frequencies generated by the musical instrument.

And especially when a sound port is added to the instrument, one or more panels connecting the front sound board and the rear sound board should be provided inside the body of the instrument to collect the sound into the sound port. Is preferred. The panel is arranged so as to be located between each sound port and the sound hole, and is usually provided on the upper bout of the guitar, but is not limited thereto. Also, although the panel preferably extends to the neck of the guitar, it may be interconnected with other panels near the neck of the guitar. In this arrangement, the panel collects sound towards each sound port, so that sound is emitted from the sound port in addition to the sound coming out of the sound hole. Also, because the panel is connected to the front and rear sound boards, the panel essentially provides structural support between the front and rear plates of the guitar, which allows the panel to support the dual bridge and saddle. It serves as a support for the assembly's struts, as well as a replacement for the ribs on traditional standard and front and/or rear sound boards.

The first aspect of the musical instrument of the present invention is
With a hollow or semi-hollow body,
Front and rear surfaces,
At least one sound board that is either the front surface or the rear surface of the hollow body,
A plurality of panels interconnecting the front and rear surfaces of the hollow body.
Another form of the instrument is, in the form of the instrument, further comprising at least one tuned sound port extending into the hollow body of the instrument through which sound can be present.
The tuned sound port has a hollow member that is inserted into an opening formed in the body of the musical instrument,
The hollow member has a central opening of a predetermined shape, and has a length that extends a certain distance from the hole into which the tuned sound port is inserted.
Another form of the musical instrument is the musical instrument of the form, wherein the opening is circular,
The hollow member has a cylindrical shape and within a range of plus or minus 20% from the opening at a constant minimum distance equal to between 1/4 and 1/2 of the diameter of the sound port opening. It is growing.
In another form of the musical instrument, the panel has a curved shape and/or a flat shape.
Another type of musical instrument is the musical instrument of the above-mentioned type, wherein the musical instrument is a stringed instrument.
In another aspect of the invention, in the musical instrument of the above aspect,
Further comprising a bridge saddle assembly attached to the front soundboard of the instrument,
The bridge saddle assembly includes at least one conventional transducer pickup that converts vibrations from the instrument strings into electrical signals.
In another form of the instrument, at least one transducer pickup is embedded in the saddle of the bridge saddle assembly.

Other forms of stringed instruments
A first soundboard that is the front of the stringed instrument, a second soundboard that is the back of the stringed instrument, and the interior of a common hollow or semi-hollow that extends between the first soundboard and the second soundboard, A dual bridge and saddle assembly extending between the first sound board and the second sound board;
The dual bridge and saddle assembly passes through a first bridge and saddle attached to the first sound board, a second bridge and saddle attached to the second sound board, and a hollow interior of the instrument. A pair of strings interconnecting the first bridge and the second bridge of the dual bridge and saddle assembly.
Another form of stringed instrument is the form of the above stringed instrument, wherein the dual bridge and saddle assembly further comprises struts connecting the first sound board to the second sound board through a hollow interior of the instrument. ..
Another form of the stringed instrument is the above-described form of the stringed instrument, in which the support column has any shape selected from the group consisting of a cylindrical shape, a rectangular parallelepiped shape, and a cubic shape.
Another form of the stringed instrument is the above-described form of the stringed instrument, wherein the first bridge has a plurality of holes arranged in a direction transverse to the set of strings and through which the set of strings passes.
The second bridge has two sets of holes, and the total number of holes included in the two sets of holes is twice the number of holes existing on the first bridge,
The set of strings is fixed to one of the two sets of holes in the second bridge.
Another form of stringed instrument is the above-described form of stringed instrument further having a plurality of peg members,
The plurality of peg members are adapted to be inserted into one of the two sets of holes on the second bridge to secure each string in the set of strings to the second bridge. Has been done.
Another form of stringed instrument is the stringed instrument of the form further including a first saddle assembly connected to the first bridge and a second saddle assembly connected to the second bridge,
Each saddle assembly includes a saddle, a conventional sound pickup device, and a wire cord and an output jack, the wire cord and the output jack corresponding to the sound pickup device in the first and second saddle assemblies. It is for connecting to a separate preamplifier attached to the instrument.
Another form of string instrument is the above form of string instrument, wherein the first and second bridges include slots for receiving the saddles of the respective saddle assemblies.
Another form of the stringed instrument is the above-described stringed instrument, wherein each saddle in both the first and second saddle assemblies has a body portion and a thin portion extending outwardly from the body portion. Has a substantially rectangular parallelepiped shape having a width substantially corresponding to the width of the slot in each bridge, so that the saddle is closely packed in the slots of the first and second bridges of the dual bridge and saddle assembly. Mated.
In another form of the stringed instrument, in the stringed instrument of the above form, at least one of the first and second saddle assemblies is an integrated unit in which the sound collecting device is incorporated in the main body portion of the saddle assembly. ..
In another form of the stringed instrument, the main body portion of each of the first and second saddle assemblies has a conical shape having an apex for engaging the pair of strings, and A semi-cylindrical shape having a curved surface for engaging a set of chords, and a geometric shape selected from the group consisting of:
Another form of the stringed instrument is the above-described form of the stringed instrument, wherein the instrument further has a sound hole for emitting a sound, and at least one sound port separate from the sound hole,
The sound port includes a member insertable into a hole formed in either the front sound board or the rear sound board,
The member has an opening of a predetermined size and a length extending into the interior of the musical instrument at a fixed distance equal to 5% to 95% of the distance between the front soundboard and the rear soundboard. Have.
Another form of stringed instrument is the above-described form of stringed instrument, wherein the member in the sound port comprises a tube having a circular opening in the center.
The tube has a length that extends into the interior of the instrument at a constant distance equal to a length between 5% and 95% of the distance between the front and rear soundboards.
Another form of the stringed instrument is the above-described form of the stringed instrument, wherein the instrument further includes at least one sound port formed at a position near the sound hole on either the front sound board or the rear sound board. Have.
Another form of the stringed instrument further comprises at least one panel connected between the front soundboard and the rear soundboard in the form of the stringed instrument,
The panel is arranged to extend between the sound port and the sound hole so as to collect sound in one direction toward the sound port.
A stringed instrument of another form is the stringed instrument of the above form, further comprising a plurality of panels,
Each panel is a straight panel that connects the front sound board and the rear sound board, from a position relatively close to the bridge on the front or rear sound board to a position near the neck of the musical instrument. It extends and is located between each sound port and the sound hole.
Another form of the stringed instrument is the above-described form of the stringed instrument, wherein each panel is a curved panel that connects the front sound board to the rear sound board, and has a “S” meandering shape.
Another form of string instrument is the above form of string instrument, in which each preamplifier is commonly connected to a single amplifier or connected to separate amplifiers.
Another form of stringed instrument is a method of making a hollow or semi-hollow, front and rear sound boards arranged on opposite sides of the hollow, a pair of strings, and a first string attached to the front sound board. A method of making a stringed instrument comprising a body having a bridge and a dual bridge and saddle assembly including a second bridge attached to the rear sound board,
Attaching a first saddle assembly to the first bridge of the dual bridge and saddle assembly;
Attaching a second saddle assembly to a second bridge of the dual bridge and saddle assembly;
Between the first saddle assembly and the second saddle assembly such that the first bridge and the second bridge are connected to each other through the inside of the hollow of the musical instrument to generate sound from each of the sound boards. And the step of stretching the set of strings on the stringed instrument.
Another method of manufacturing a stringed instrument is the method of manufacturing a stringed instrument of another form, in which a pillar that connects the first bridge and the second bridge of the dual bridge and saddle assembly to each other through the inside of the hollow is provided. And the strut is for structurally supporting the front sound board to the rear sound board.
A method for manufacturing a stringed instrument in another form has a sound hole and at least one sound port located in the vicinity of the sound hole in the method for manufacturing a stringed instrument in another form,
The sound port is a method for producing a stringed instrument having a hollow member penetrating the front sound board or the rear sound board,
The length of the hollow member is 5% to 95% of the distance between the front sound board and the rear sound board to tune the sound port to a desired frequency range proportional to the resonance frequency of the guitar. It is selected to extend into the interior of the instrument at a constant distance equal to.
A method of manufacturing a stringed instrument of another form is the method of manufacturing a stringed instrument of another form, in which the length of the hollow member is in order to tune the sound port to a desired frequency range proportional to the resonance frequency of the guitar. It is chosen to extend into the interior of the instrument a constant distance equal to 20% to 80% of the distance between the front soundboard and the rear soundboard.
The method for manufacturing a stringed instrument of another form further includes the step of providing a panel for collecting and emitting sound in the sound port between the sound port and the sound hole in the method of manufacturing a stringed instrument of another form. ..
A method of manufacturing a stringed instrument of another form is the method of manufacturing a stringed instrument of another form, wherein the panel is a straight panel or a curved panel having a meandering shape.
Other forms of instruments have a hollow or semi-hollow interior, a front surface and a rear surface, and have a soundboard that is either the hollow structural front surface or the structural rear surface. , Or, both the front surface and the rear surface have a body acting as a sound board for the instrument,
The body has at least one tuned sound port extending into the instrument, the instrument being capable of presenting sound through the tuned sound port;
The tuned sound port has a hollow member that is inserted into a hole formed in the musical instrument,
The said hollow member is a musical instrument which has a center opening of a predetermined shape, and has the length which extends at a fixed distance from the hole into which the said tuned sound port is inserted.
In another form of the musical instrument, the musical instrument is a stringed instrument,
The tuned sound port is inserted into at least a hole formed in the structural front or rear sound board of the instrument,
25. The musical instrument of claim 24, wherein the hollow member extends into the interior of the musical instrument at a constant distance equal to a distance between 5% and 95% of the distance between the front and rear soundboards.
In another form of the musical instrument, the hole through which the tuned sound port extends is circular, and the hollow member has a cylindrical or conical shape.
Another form of the instrument is the above form of instrument, wherein the hollow member is within a range of plus or minus 20% of a constant distance equal to a minimum distance between 1/4 and 1/2 of the diameter of the port opening. It has a length that extends from the soundboard into the interior of the instrument at a distance.
Another form of the musical instrument further comprises a plurality of panels connecting the front and rear sound boards to each other.
In another form of the instrument, the panel has a flat or curved shape.
In another form of the musical instrument, in the musical instrument of the above form, the panel has an S shape and has a meandering shape or a sinusoidal curve shape.
Another type of musical instrument further comprises at least a tuned second sound port in the musical instrument of the above type,
Each tuned sound port is symmetrically arranged to collect sound through at least one tuned sound port.
In another form of the instrument, in addition to the tuned sound port, the second form of the instrument has second sound holes in the panel symmetrically arranged on both sides of the sound hole.
In another form of the instrument, the panel of the form extends symmetrically from both sides of the instrument and from the ends of the sides.
Another form of the instrument is the instrument of the above form, further comprising a dual bridge configuration,
The dual bridge configuration includes a first bridge attached to the front sound board, a second bridge attached to the rear board, and a post of a sound wave structure connecting the first bridge and the second bridge to each other. With.

Other advantages of the present invention will become apparent upon reading the following detailed description of the invention in conjunction with the accompanying drawings.
1 is a structural front view of an acoustic guitar manufactured using the dual bridge and saddle assembly of the present invention. 2 is a structural rear view of the guitar shown in FIG. 1. FIG. 2 is a structural left side view of the guitar of the present invention shown in FIG. 1. FIG. 2 is a structural right side view of the guitar shown in FIG. 1. FIG. 2 is an end view of the structural headstock of the guitar of FIG. 1 viewed from the tip of the headstock. FIG. 2 is an end view of the structural bottom end of the guitar of FIG. 1 seen from a lower bout corresponding to the lower end of the guitar. FIG. 2 is a structural perspective view of the guitar of the present invention shown in FIG. 1, in which dotted lines schematically show the arrangement of panels between respective sound ports and sound holes, and further, dotted lines are used to show the guitar. It shows two preamplifiers attached to one side, the connections between the sound collectors and the respective preamps attached to each bridge of the dual bridge and saddle assembly, and each of the two preamps and the amplifier. Shows an external connection between. 8A is a structural cross-sectional view of the guitar of the present invention taken along line 8A-8A shown in FIG. 7. FIG. 8 is a structural exploded view of the guitar shown in FIG. 7 from the rear side, showing the guitar in two halves and the dual bridge and saddle assembly spaced from each half of the guitar, and further showing each half of the guitar. And sound panels on opposite sides of the sound port, and a linear panel provided between each sound port and the sound hole for collecting and emitting sound to each sound port. FIG. 9B is another structural exploded view of the guitar of the present invention shown in FIG. 8B, showing another form of the panel of the present invention shown in FIG. 8B is a panel having an S-shape instead of a straight line. FIG. 9 is a structural exploded perspective view of the dual bridge and saddle assembly of FIGS. 8B and 9A, with a set of strings strung through the interior of the guitar between each bridge of the dual bridge and saddle assembly. And showing the arrangement and shape of the guitar string hung saddle in each of the dual bridges and saddle assembly bridges of the present invention. FIG. 9B is a perspective view of a preferred form of one saddle assembly adapted for attachment to the dual bridge and saddle assembly of FIG. 9B, one integral including a saddle and a sound pickup device embedded in the saddle. Figure 5 shows a saddle assembly forming a unit. FIG. 11 is a view showing the integrated saddle and the embedded sound pickup device shown in FIG. 10, and is a cross-sectional view taken along line 11-11 of FIG. 10. FIG. 8B is another exploded view of the dual bridge and saddle assembly of the present invention shown in FIG. 8B, each string included in a set of guitar strings for a second bridge mounted on the rear soundboard of the guitar. FIG. 6 is a diagram showing a method of fixing a guitar string and a method of stretching a set of guitar strings so as to connect the second bridge of the rear sound board and the first bridge of the front sound board to each other.

All drawings are directed to preferred forms of the invention and are not intended to limit the scope of the invention, but rather highlight selected versions of the invention.

The musical instrument of the present invention is illustrated by an acoustic guitar 10 shown generally in Figures 1-9, which represents a preferred form of the musical instrument of the present invention. The acoustic guitar 10 includes a front sound board 12 shown in FIG. 1, a rear sound board 16 shown in FIG. 2, a dual bridge and saddle assembly 14 shown in detail in FIGS. 8A, 8B, 9A, 9B and 12. It has a body 11 including. The dual bridge and saddle assembly 16 extends through the hollow or semi-hollow interior 18 of the body 11 from the front soundboard 12 of the guitar 10 to the rear soundboard 14. As shown in FIGS. 3, 4, and 6, the guitar 10 has a side surface 13 that completely connects the body of the guitar 10 by connecting the front sound board 12 and the rear sound board 14.

The dual bridge and saddle assembly 16 shown in FIG. 8A extends between the front sound board 12 and the rear sound board 14, and includes a first bridge 20 attached to the front sound board 12 and a rear sound board 14. Attached to the second bridge 22, struts 23 and 24 connecting the first bridge 20 and the second bridge 22 to each other, and a saddle assembly insertable into a slot 34 of the first bridge 20 as shown in FIG. 9B. It has a solid body 30 and a saddle assembly 31 that can be inserted into the slot 40 of the second bridge 22.

A set of strings 33, of custom or extended length, extend from the headstock 19 at the tip of the guitar 10 along the neck 17 of the guitar 10 to the first bridge 20 mounted on the front soundboard 12. From the first bridge 20 through the interior 18 of the hole in the body 11 of the guitar 10 to the second bridge 22 attached to the rear sound board 14. One end of each string in the set of guitar strings 33 is connected to the tuning knob 15 of the headstock 19, and the other end of each string in the set of strings 33 is fixed to the second bridge 22 by a peg. Thus, the set of strings 33 interconnect the first bridge 20 and the second bridge 22 through the interior 18 of the hole of the guitar 10. The set of strings 33 preferably starts from a position fixed by pegs to the second bridge 22 on the rear sound board 14 and beyond the saddle 48 inserted in the second bridge 22 and to the first bridge 20. It is stretched over the saddle 44 inserted into the first bridge 20 and extends from the first bridge 20 along the neck 18 of the guitar 10 to the tuning knob 15. Details will be described later with reference to FIGS. 9B and 12.

The struts 23, 24 of the dual bridge and saddle assembly 16 rear the upper soundboard 12 of the guitar 10 so that the front or rear soundboard 12, 14 does not collapse due to excessive tension due to tension on the guitar strings 33. It functions to support and fix the sound board 14. However, it should be understood that the use of struts 23, 24 is preferred but not critical to the invention. The reason is that by using another support member independent of the columns 23 and 24 of the dual bridge and saddle assembly 16 between the front sound board 12 and the rear sound board 14, the front sound board 12 and the rear sound board are connected. This is because it is possible to obtain structural support for preventing the board 14 and the board 14 from collapsing relative to each other. As another support member, for example, the panels 80 and 82 incorporated with the use of the sound ports 70 and 72 can be used as described later. The struts 23, 24 of the dual bridge and saddle assembly 16 are preferably arranged with a tilt angle between the front sound board 12 and the rear sound board 14, as shown in FIG. 8A. The position of the sound board 12 is preferably slightly ahead of the position of the rear sound board 14 towards the neck 17 of the guitar 10. With this arrangement, the tension of the set of guitar strings 33 can be somewhat weakened when the guitar 10 is tuned. The struts 23, 24 can be made of a desired material, preferably wood, or an alternative composition of wood, the shape of which can be any desired geometry including, for example, a rectangular parallelepiped shape, a cubic shape, a cylindrical shape. It can be a geometrical shape.

The first bridge 20 of the dual bridge and saddle assembly 16 shown in FIGS. 1 and 9B has a slot 34 into which the saddle assembly 30 is inserted and further includes a plurality of openings 35 for tensioning through a guitar string 33. Contains. The number of openings 35 corresponds to the number of guitar strings 33. For example, when the guitar 10 has six guitar strings 33, the first bridge 20 has six openings 35. The openings 35 are arranged in a direction crossing the pair of guitar strings 33 on a substantially horizontal plane. The slots 34 of the first bridge 20 are preferably arranged at an acute angle with respect to the horizontal, as shown in FIG. 1, to facilitate and/or allow adjustment of particular tones of the guitar. To The shape and size of the first bridge 20 may be the same as the shape and size of the second bridge 22 of the dual bridge and saddle assembly 16 except for the size in the width direction.

The first bridge 20 accommodates only one set of openings 35, whereas the second bridge 22 accommodates two sets of openings 38, 39 for the guitar strings 33, so that the second bridge 22 is As shown in 2, it is preferable to have a width d wider than the width of the first bridge 20. A set of openings 39 in the second bridge 22 are used to secure one end of each guitar string 33 with a peg. The two sets of openings 38, 39 should be arranged parallel to each other on either side of the slot 40 of the second bridge 22 and in total equal to twice the number of chord openings 35 present in the first bridge 20. It should include an opening.

As shown in FIGS. 9B and 12, the string 33 is fixed to the opening 39 of the second bridge 22 by using a peg member 42. The peg member 42 engages one end of each string 33 and is inserted into the opening 39, whereby each peg member 42 engages the respective string 33 in the opening 39 to engage the strings. The formed end is firmly fixed to one of the openings 39. Then, as shown in FIGS. 9B and 12, the guitar string 33 passes from the end fixed to the opening 39 through the corresponding opening 38 in the second bridge 22 and the saddle 48 of the saddle assembly 31. Tensioned over and passed through the opening 35 in the first bridge 20 and hung from there over the saddle 44 of the saddle assembly 31 along the neck 17 of the guitar 10 at the tip 19 of the guitar 10. The tuning knob 15 is stretched.

The saddle assembly 30 is insertable into a slot 34 in the dual bridge and first bridge 20 of the saddle assembly 16 and, as shown in FIG. 9B, a saddle 44, a pickup 45, a wire cord 46, and an output jack 47. Includes and. The pickup 45 is a conventional element, and is, for example, a sound pickup type such as a piezoelectric shield magnetic element provided in a wire coil. A jack 47 extending from the wire cord 46 is adapted to connect the pickup 45 to a preamplifier 60 mounted on the side surface 13 of the guitar 10, as shown in FIG.

Similarly, saddle assembly 31 is insertable into slot 40 in second bridge 22 of dual bridge and saddle assembly 16 and includes saddle 48, pickup 50, wire cord 51, and output jack 52. There is. The output jack 52 extends from the wire cord 51 so that the pickup 50 can be connected to another preamplifier 52 that can be mounted on the same side 13 of the guitar 10. As shown in FIG. 7, the two preamplifiers 60 and 62 may be connected to the amplifier 65 through the output jacks 63 and 64 attached to the side surface 13 of the guitar 10. In this case, for example, the conventional Y connection 66 may be used for connection, or, instead, each preamplifier 60, 62 may be connected to a separate amplifier ( (Not shown).

Each saddle assembly 30, 31 has a saddle 44, 48 and a pickup 45, 50, respectively. The saddles 44,48 function to support a set of guitar strings 33 on the first and second bridges 20,22 on the front and rear sound boards 12,14, respectively. Each saddle 44, 48 may be a separate and independent part of the saddle assembly 30, 31 from each pickup 45, 50. Alternatively, one or both saddle assemblies 30, 31 may have a pickup integrated with the saddle assembly 30, 31 to form an integrated unit incorporating both the saddle and the pickup. .. In the guitar of the present invention, the pickup 50 of the saddle assembly 31 is adapted for insertion into the opening 57 formed in the saddle 48, thereby forming an integrated unit. On the other hand, the pickup 45 of the saddle assembly 30 may be integrated with the saddle 44 to form one unit, but it need not be so. Therefore, as shown in FIG. 9B, since the pickup device 45 of the saddle assembly 30 is an independent component, the pickup 45 is independently inserted into the slot 34 of the first bridge 20, and thereafter, the saddle assembly 30 is mounted on the saddle assembly 30 from above. 44 must be inserted into the slot 34, while the saddle 48, which is associated with the pickup 50, is inserted into the slot 40 of the second bridge 22 as an integrated unit.

Saddle components 44, 48 in each saddle assembly 30, 31 regardless of whether one or both saddle assemblies 30, 31 are made to form an integrated unit that includes both the saddle and the pickup. Should have a configuration including body portions 53, 55 and a narrow portion 54 extending outwardly from the body portions 53, 55. The thin extension 54 should have a generally rectangular parallelepiped shape. This is because the cross sections of the saddles 44, 48 are T-shaped, so that the thin extension portion 54 becomes the vertical side of the "T" shape, and the main body portions 53, 55 become the horizontal side of the "T" shape. Become. Further, the narrow portion 54 extending from each saddle 44, 48 should have its width matched with the width of the respective slots 34, 40 of the first and second bridges 20, 22. Moreover, the thin portion 54 should have a width much smaller than the width of the main body portions 53 and 55 which are the starting points of the extension of the thin portion 54. The body portion 53 of the saddle 44 may have a conical shape that extends to a slightly pointed apex 56, which is configured to engage the guitar string 33 on the front soundboard 12. On the other hand, the saddle 48 may simply have a rounded semi-cylindrical configuration for engaging the guitar strings 33 on the rear soundboard 14.

The guitar 10 of the present invention has at least one sound port, but preferably has two sound ports 70, 72, as shown in FIGS. 1, 7, 8A, both sound ports 71, 72 being It is preferably formed on both sides of the sound hole 13 of the guitar 10 on the front sound board 12. The sound hole 13 is located on the body 11 of the guitar 10, preferably on the front sound board 12. The sound holes 13 are preferably located below the guitar strings 33 and symmetrically between each sound port 70, 72. Each sound port 70, 72 preferably has a member 77, 78 having a desired shape. One of the sound boards, preferably the front sound board, is formed with an opening made to accommodate the members 77, 78, the shape of the members 77, 78 adapted to be inserted into the opening. It preferably has a hollow tube shape. Each member 77, 78 extends from the front soundboard 12 of the guitar 10 to a position within the hollow interior 18 of the guitar, the length of which is the distance between the front and rear soundboards 12 and 14 of the guitar. Is preferably equal to 5% to 95% of the length. Also, members 77,78 should have openings 73,74 extending through each member 77,78. The openings 73, 74 have a desired shape and size and are preferably circular, so that each member 77, 78 forms a parabolic or cylindrical shape. By varying one or both of the size of the openings 73, 74 and the length of extension of each sound port 70, 72 within the interior 18 of the guitar 10, a desired frequency range proportional to the resonant frequency of the guitar, The sound ports 70, 72 can be individually tuned. The optimum condition is that the sound ports 70 and 72 have circular openings 73 and 74 of the same size as the members 77 and 78, and the members 77 and 78 are from the front sound board 12 to the rear sound board 14. Has a length corresponding to 20% to 80% of the distance, which improves the tuning performance of the majority of acoustic guitars. However, the lengths and sizes of the members 77, 78 of the sound ports 70, 72 need not be the same.

Each sound port 70, 72 preferably has a geometrically linear panel 80, 82 connected between the front sound board 12 and the rear sound board 14. The panels 80 and 82 are disposed between the sound ports 70 and 72 and the sound hole 13 and extend from a position relatively near the lower bout of the guitar 10 to a position near the neck 17 of the guitar 10, or Near the neck 17 of the guitar 10, linear panels 80, 82 extend to intersect each other. This allows the sound to be collected in the sound ports 80, 82 and emitted. It should be noted that although only two panels 80, 82 are shown, additional panels may be used to form an acoustic maze in the interior 18 of the guitar body 11.

FIG. 9 shows an alternative to the use of straight panels 80, 82, where each panel connected between the front sound board 12 and the rear sound board 14 has an "S" shape. It has a serpentine curved shape.

As described above, since the panels 80 and 82 are connected between the front sound board 12 and the rear sound board 14, the panels 80 and 82 have the support columns 23 even when used together with the support columns 23. Even when not in use, it acts as a structural support to prevent the front and/or rear soundboards from collapsing when the string tension is very high.

Claims (5)

With a hollow or semi-hollow body,
Front and rear surfaces,
At least one sound board that is either the front surface or the rear surface of the hollow body,
A plurality of panels interconnecting a front surface and a rear surface of the hollow body. Further comprising at least one tuned sound port extending into the hollow body of the instrument, through which sound can be present,
The tuned sound port has a hollow member that is inserted into an opening formed in the body of the musical instrument,
The musical instrument according to claim 1, wherein the hollow member has a central opening having a predetermined shape, and has a length extending a certain distance from a hole into which the tuned sound port is inserted. .. The opening is circular,
The hollow member has a cylindrical shape and within a range of plus or minus 20% from the opening at a constant minimum distance equal to between 1/4 and 1/2 of the diameter of the sound port opening. The musical instrument according to claim 2, which is extended. The musical instrument according to any one of claims 1 to 3, wherein the panel has a curved shape and/or a flat shape. The musical instrument according to claim 1, wherein the musical instrument is a stringed instrument.

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