JP2017191246A - Electric bamboo flute - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a user-friendly and improved electric bamboo flute and bamboo flute acoustic system that convert a timbre of a bamboo flute to an electric signal with a microphone and amplifies it to realize high-volume and clear bamboo flute timbre.SOLUTION: An electric bamboo flute of the present invention comprises: a bamboo flute; a sub-tube connected to a side face of the bamboo flute for resonating and amplifying the sound of the bamboo flute, the sub-tube being a tube that is hollow inside, has the top and bottom ends sealed, and having holes in the side face; and a microphone fixed with a sound collection surface oriented downward above the center in the vertical longitudinal direction of the sub-tube. Further, a bamboo flute acoustic system is characterized by inputting an electric signal from the microphone to a speaker over wire or wireless connection.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric shakuhachi, which is an improvement of the shakuhachi with a microphone, which is an improvement of the shakuhachi with a microphone, which converts the sound of the shakuhachi into an electric signal with a microphone, amplifies it, and realizes a clear sound with a larger volume of the shakuhachi. . Furthermore, it is related with the shakuhachi sound system which connected the electric shakuhachi and the speaker.

  Shakuhachi plays the sound of 12 scales by operating the opening and closing of the five holes (finger holes) drilled on the side of the shakuhachi with the finger while adjusting the angle, direction and amount applied to the incision of the shed. The shakuhachi tone is a healing sound.

  The sound of shakuhachi is not the rhythm culture of flying and jumping in the West like the hunting people, but the sound of the pedestrian culture of the farming people who move while sipping their feet during farming. Play the world of mysterious timbres from ancient Japan.

  Also, the shakuhachi performance will be like when you meditate with zazen, by breathing out for a long time, resting your brain, freeing you from stress like elusive anxiety and stabilizing your autonomic nerves Is well known and helps maintain health. For this reason, there are many people who yearn for shakuhachi performances that play a mysterious tone.

  When thinking about health, people who are interested in the shakuhachi syllabary first come to mind first, breathing abdomen, increasing metabolism, and thinking about mental health with a healing tone It is also true that health is no longer able to be protected by the country and others, even in the background of the times.

  However, it was unfortunate because it was known that many beginners would not be able to play any sound when they had a shakuhachi, and many would give up if it was impossible.

  Shakuhachi has a history of over 2,000 years, and has been made from bamboo with seven knots since ancient times. Recent advances in chemical technology have produced plastic moldings and wooden shakuhachi imitations, but they also have their merits and demerits.

(Bamboo shakuhachi)
Bamboo, which is a natural material, is different one by one in terms of bending, inner diameter, flesh thickness, fiber density, etc., so that it can be made into a musical instrument (shakuhachi) that can create a subtle tone with the correct temperament. Requires long experience, skills and energy.

  Bamboo shakuhachi cuts through seven nodes, vibrates air molecules in the bamboo pipe with just the force of breath, and creates a heavy-weight tone with a large inner diameter and a smooth flow of breath Durability due to breath containing a lot of moisture is considered. Pull out the bamboo stems and paint the inside of the tube, which is rough and rough, with a hard object such as gypsum, sharpen it up and down and repeat it over and over again, and tune the inner surface. The surface is coated with lacquer to make it durable against moisture.

  Through this process, the inner surface of the bamboo pipe is hard, the middle part that wraps it is cork-shaped with a lot of air molecules through which bamboo fiber passes, and the outer shakuhachi surface is called a hard skin It has a structure and is a sandwich-shaped cylinder that easily resonates.

  However, this structure is also a disadvantage of bamboo shakuhachi. The inner wall, the cork shape of the middle part, the outer skin of the surface, and this three-layer structure, the cork shape of the middle part contains a lot of air molecules, so it always expands and contracts due to the humidity change due to the environmental temperature. Due to the difference in the shrinkage rate of the structural material, it was impossible to cope with a rapid temperature change and the shakuhachi was torn, so care must be taken in managing the shakuhachi.

  On the other hand, there are Shinobue using Shinotake, which produces a light and sharp sound, which is thinner and lighter than Shintake. On the other hand, the shakuhachi produces a profound sound, so the proportion of hard bamboo roots and gypsum and other hard parts are increased.

  This makes the shakuhachi tube difficult to handle for beginners who do not have the technology to push a strong breath out of Tanda.

(Plastic and wooden shakuhachi)
Plastic shakuhachi and wooden shakuhachi have a stable and uniform finish, can be produced in large quantities as industrial products, reduce running costs, and are appreciated by people. However, because it is manufactured by making a model imitating bamboo, the feeling of a false object is not wiped out, both plastic molded products and wooden products made of hardwood are similarly thick and specific gravity is the same as bamboo Most of them are difficult to handle for beginners.

  And, like a bamboo shakuhachi, the cylinder is not the above-mentioned three-layer structure and is uniform, so that it is impossible to produce an expected and broad timbre.

(Vinyl chloride pipe shakuhachi)
On the other hand, the most important aspect of shakuhachi performance is the shape of the lips. Next, the angle, direction, and amount of the air that blows on the notch in the mouth. The fingering that plays the scale can be learned well after the sound is emitted, and can improve by continuing to practice.

  Therefore, the inventor has developed a practice shakuhachi made of vinyl chloride (Patent Document 1) that can concentrate on sound output so that the first sound of the shakuhachi can be smoothly produced.

  Moreover, the shakuhachi scales for shakuhachi (patent document 2), which can be used for easy, fun, and health promotion, replaces the difficult shakuhachi score from ancient times with easy-to-understand numbered music, lowers the hurdle of understanding the score, A shakuhachi score (Patent Document 3) has been developed to facilitate the shakuhachi blowing.

  In addition to the practice shakuhachi (Patent Document 1), we have also developed a vinyl chloride shakuhachi that can play a musical scale like a shakuhachi, that is, a hole corresponding to the scale.

  The material of vinyl chloride is easily available everywhere, and even without special machinery, you can easily make a shakuhachi that is stable and temperate with a few tools. Moreover, since the tube is hard and the wall thickness is about 3 mm, sound can be produced even with a weak breath given by a beginner.

  However, the advantage is also a disadvantage, and if the blower gains experience and has breathing power, ordinary PVC pipes with a tube thickness of about 3 mm will not be able to receive the vibration and the sound will be overturned. (Sound cracking), you can only play. It will be like a soprano recorder.

  Therefore, the inventor can cope with the weak breath to the strong breath from the bottom of the stomach, which should overcome the difficulties of the shakuhachi made of vinyl chloride tube, and has a feeling of weight which is not inferior to that of bamboo shakuhachi. We have developed a shakuhachi with a resonance tube (Patent Document 4) that can produce a healing tone that feels spacious and can be made extremely cheap.

  The shakuhachi with a resonance tube of Patent Document 4 is composed of a shakuhachi and a resonance tube that is connected to the side surface of the shakuhachi and resonates and amplifies the sound of the shakuhachi. To do. As a result, the resonance pipe is brought into close contact with the main pipe, and the vibration sound of the mellow healing tone produced by the main pipe can be caused to resonate in the resonance pipe, and the width and the depth can be fostered. Even the slight vibration of the main pipe with a weak breath makes a loud sound when the resonance pipe resonates. Even for a strong breath, the vibrating volume (weight) is increased, so it can be handled without sound cracking. The use of a special pipe (with liner) with a heavy weight for the vinyl chloride pipe was even more effective.

  However, when performing a shakuhachi solo at a gymnasium, performance hall, etc., it may be canceled by people's conversation, walls, etc., and may not be able to play at a sufficient volume. Therefore, a method of collecting sound by a microphone and generating a timbre from a speaker can be considered. However, in general halls, a microphone for conversation / lecture and a microphone for dynamics (dynamic microphone) are used to collect sound through air vibration, so that it is difficult to sufficiently collect a shakuhachi tone.

  In addition, because the shakuhachi blows its mouth and plays a sound, the position of the microphone is limited. If the microphone is placed on the front side of the shakuhachi, go-go and wind noise (wind noise) will be produced. On the other hand, there is not a sufficient amount of vibration in the middle part on the back side, and sufficient sound cannot be collected. Furthermore, when microphones are arranged at the front, back, or left and right side positions, the shakuhachi plays sounds while moving up, down, left, and right, which interferes with its operation.

  Furthermore, even when the microphone is arranged in the direction of the lower end of the shakuhachi, wind noise is collected and a clear shakuhachi tone is not obtained.

  Therefore, the inventor has devised a shakuhachi with a microphone and a shakuhachi acoustic system (Patent Document 5) that converts the tone of the shakuhachi into an electrical signal with a microphone, amplifies it, and realizes a clear tone with a loud sound of the shakuhachi. did.

  The shakuhachi with microphone and the shakuhachi acoustic system of Patent Document 5 are, as shown in FIG. 1 of Patent Document 5, a shakuhachi 2 comprising a shakuhachi 2 and a microphone 7 fixed to the lower outside of the shakuhachi 2. A resonance tube 5 that is a cylinder of an internal cavity that is connected to the side surface of the shakuhachi 2 and resonates and amplifies the sound, and a microphone 7 that is fixed inside the lower portion of the resonance tube 5; It is characterized by comprising. Furthermore, as another embodiment, the shakuhachi 1a with a microphone shown in FIG. 7 is also included. Further, the shakuhachi acoustic system 10 is characterized in that the microphone 7 and the speaker 8 are connected.

  In the development stage of Patent Literature 5, when the resonance tube 5 is provided, the microphone 7 is fixed inside the lower portion of the resonance tube 5. This is because the microphone 7 is fixed at these positions so that the vibration is maximum, and it does not interfere with finger movement and gripping without collecting wind noise. Certainly, the microphone shakuhachi 1a of Patent Document 5 does not interfere with finger operation and gripping without collecting the wind noise of breath.

  Since the shakuhachi sound cannot be collected sufficiently with a dynamic microphone, Patent Document 5 was developed with a view to providing a condenser microphone at the lower end of the secondary pipe 5a where resonance was considered to be maximum. In the condenser microphone, the sensitivity is inevitably high and howling occurs. Therefore, it is necessary to cancel the howling with the volume knob 7b.

  However, in the shakuhachi 1a with a microphone shown in FIGS. 7 and 8 of Patent Document 5, if the speaker 8 and the shakuhachi 1a with a microphone (microphone 7) are in the vicinity, a howling phenomenon occurs, but the lower end of the sub-tube 5a. If there is a volume knob 7b, it is difficult to rotate the volume knob 7b to eliminate howling. If the volume knob 7b and the microphone 7 are close to each other, if the microphone sensitivity is high when the volume is adjusted, Has been picked up as noise. Further, the volume knob 7b may be damaged by hitting it. Furthermore, in reality, sound cannot be collected at the maximum volume when the position of the microphone 7 is below the sub-tube 5a.

  On the other hand, the inventor can consistently practice how to blow the shakuhachi's mouth, that is, how to make the shakuhachi sound, and play the shakuhachi at the same mouth (mouth). A shakuhachi set (Patent Document 6) was devised. This makes it possible to prevent sound cracking even at high volume.

  As shown in FIG. 1 of Patent Document 6, the shakuhachi set of Patent Document 6 includes a mouth portion 2 having a shakuhachi shed 2c, and a practice tube that is detachably connected to the mouth portion 2. As practice tubes, there are provided a practice short tube 3 for practicing how to breathe, and a practice long tube 5 for practicing how to breathe stronger than the practice tube 3. Further, a scale tube 6 having holes 6a, 6b, 6c, 6d and 6e corresponding to the scale of the shakuhachi is provided, and the scale tube 6 is detachably connected to the mouth portion 2. The connection between the mouth portion 2 and each pipe is connected through a joint 4 having a through hole 4a. The lower end 2h of the mouth portion 2 and the upper ends 3b and 5a of each pipe are connected to the through hole 4a. , 6f are inserted.

Utility Model Registration No. 3175916 (Practice Shakuhachi) Utility model registration No. 3185053 gazette (scale chart for shakuhachi) Utility Model Registration No. 3185768 (shakuhachi score) Utility model registration No. 3185768 (shakuhachi with resonance tube) Utility Model Registration No. 3197607 (Shakuhachi with Microphone) Utility Model Registration No. 3199364 (Shakuhachi Set)

  Therefore, the present invention is an electric shaku which is an improved shakuhachi with a microphone which is easy to use and converts a shakuhachi timbre into an electric signal with a microphone, amplifies it, and realizes a clear timbre with a louder sound of the shakuhachi. Provide eight and shakuhachi sound system.

As a result of earnest research, the inventor has found that the maximum sound collection point of the sound by the microphone 7 is not the lower part of the sub-tube 5a. It has been found that the relationship between the position of the hole drilled in the secondary pipe 5a and the microphone 7 can be further improved, and the present invention has been completed.
That is, the present invention solves the above problems by
(1)
Shakuhachi,
An internal cavity that is connected to the side surface of the shakuhachi and resonates and amplifies the sound of the shakuhachi, the upper and lower ends are sealed, and a secondary tube that is a cylinder with a hole formed in the side surface;
A microphone fixed above the center in the vertical longitudinal direction of the sub-tube with the sound collection surface facing downward;
Electric shakuhachi, characterized by comprising
(2)
Shakuhachi,
An internal cavity that is connected to the side surface of the shakuhachi and resonates and amplifies the sound of the shakuhachi, the upper and lower ends are sealed, and a secondary tube that is a cylinder with a hole formed in the side surface;
A microphone fixed above the center in the vertical longitudinal direction of the sub-tube with the sound collection surface facing downward;
A volume knob that seals the upper end of the sub-tube and adjusts the volume of the microphone;
A jack box which is provided by sealing the lower end of the sub-tube and is an output port of an electronic signal of sound from the microphone;
Electric shakuhachi, characterized by comprising
(3)
The electric shakuhachi according to (1) or (2), wherein a hole on a side surface of the sub-tube is located within 3 cm below a sound collection surface of the microphone.
(4)
A shakuhachi acoustic system, wherein an electric signal of the electric shakuhachi microphone according to any one of (1) to (3) is input to a speaker by wire or wirelessly.
It was.

  Since the present invention has the above-mentioned configuration for specifying the microphone fixing position, the position of the hole on the side of the auxiliary pipe, and the position of the volume knob and the jack box, the volume control is easy and is difficult to hit, so the volume knob is damaged. An electric shakuhachi that is easy to use and eliminates howling, and has a microphone inside the sub-pipe so that there is no wind noise and does not interfere with performance. Can collect sound. Furthermore, if a resonance tube and a vibrating blade are provided, a shakuhachi tone can be collected more efficiently. As a result, even in a large performance venue such as a hall, the shakuhachi's clear sound can be achieved without relying on the microphone performance of the performance venue, making it possible to further improve the shakuhachi solo. .

It is the front schematic diagram of an example of the electric shakuhachi and shakuhachi sound system which are this invention. It is a rear view of an example of the electric shakuhachi which is this invention. It is a left view of an example of the electric shakuhachi which is this invention. It is a top view of an example of the electric shakuhachi which is this invention. It is a bottom view of an example of an electric shakuhachi that is the present invention. FIG. 4 is a schematic cross-sectional view taken along lines A-A ′ (A), B-B ′ (B) in FIG. 1 and C-C ′ (C) in FIG. 3.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited to the following Example.

  As shown in FIGS. 1 to 6, the electric shakuhachi 1 according to the present invention includes a shakuhachi 2, a resonance tube 5, a microphone device including a microphone 7 and the like. The electric shakuhachi can also be called a shakuhachi with a microphone, an electric shakuhachi, an electric shakuhachi, or an electronic shakuhachi.

  Further, the electric shakuhachi 1 is provided with a speaker 8 that receives the electric signal 7a corresponding to the tone of the shakuhachi 2 output from the microphone 7 and generates the sound of the shakuhachi 2, so that the shakuhachi acoustic system 10 and Become. The speaker 8 can also receive the electric signal 7 a amplified by the amplifier 9. The electric signal 7a from the microphone 7 is input (connected or transmitted) to the speaker 8 by wire or wirelessly.

  The shakuhachi 2 (main pipe) includes a lower pipe 3, a mouth portion 4, and a joint 2a having a through hole connecting the lower tube 3 and the mouth portion 4, and includes a through hole 3i. The shakuhachi 2 may be a single shakuhachi as shown in Patent Documents 4 and 5 in addition to the one shown here.

  The lower tube 3 is a tube made of a resin, for example, vinyl chloride, in which four holes 3a, 3b, 3c, and 3d for determining a musical scale are formed on the front surface and one hole 3e is formed on the rear surface, and both ends are opened. In the present invention, conventional bamboo, wooden, or plastic other than vinyl chloride may be used.

  Further, the lower pipe 3 is preferably a water pipe (lining pipe) lined with a liner 3h, which is highly resistant to expansion and contraction due to temperature or the like. Here, the liner 3h embedded in the lower pipe 3 is illustrated, but a vinyl chloride lining pipe in which the lower pipe 3 is coated with a hard resin may be used. The lining tube is heavier and larger in volume than ordinary vinyl chloride, and can breathe strong air, receive vibrations, and prevent sound cracking. The length of the lower pipe 3 is free, and if it is short, it will be high and if it is long, it will be low. In particular, when the lower pipe 3 is short, sound cracking frequently occurs. The same applies to an inner cylinder 4f and a sub pipe 5a of the mouth 4 described later.

  The mouth portion 4 is composed of an inner cylinder 4f having the same diameter both inside and outside the lower tube 3, and an outer cylinder 4g that is housed inside while leaving one end of the inner cylinder 4f, and has one end of the inner cylinder 4f not covered with the outer cylinder 4g. A pipe made of resin, for example, vinyl chloride, is fitted into the through hole 2b from one side of the joint 2a. The outer diameter of the mouth part 4 (outer cylinder 4g) is larger (thicker) than the outer diameter of the lower pipe 3, and the inner diameter of the mouth part 4 (inner cylinder 4f) is substantially equal to the inner diameter of the lower pipe 3, and the outer cylinder 4g Has reached the upper end of the inner cylinder 4f. And the inner cylinder 4f and the outer cylinder 4g are adhere | attached.

  In addition, one side surface of the portion where the inner tube 4f and the outer tube 4g are fitted is inclined portions 4d and 4b which are cut obliquely, and the center of the end portion of the inclined portion 4d is further cut, so that a front semi-elliptical shape is obtained. The notch 4e is provided as a throat 4a, and the abutting portion 4c is provided on the opposite side surface to be in contact with the jaw. As shown in FIG. 3 and the like, the corner of the contact portion 4c is processed into a gently rounded state so that no pain is felt when the jaw is applied.

  By dividing the main pipe (Shakuhachi 2) into the mouth part 4 and the lower pipe 3 and connecting them with the joint 2a, even if the shed 4a is deteriorated or damaged, other parts other than the mouth part 4 are broken. Since it is difficult to deteriorate, only the mouth portion 4 can be exchanged, and it is economical without repairing the mouth 4a which is difficult to repair, and without having to renew all the shakuhachi. It is also easy to make the mouth 4 thicker than the lower tube 3.

  As shown in FIG. 1, the joint 2 a is a pipe having a through hole 2 b formed therein, and the mouth portion 4 and the lower pipe 3 are in contact with each other to be connected.

  The joint 2a can be formed by resin molding or processing wood. When wood is used, it is preferably hard, and examples thereof include beech wood and oak wood. It is desirable that the joint 2a has a square shape such as a hexagonal outer periphery so that rotation and falling of each pipe can be prevented. Furthermore, the joint 2a is arranged in the vicinity of the mouth part 4, thereby increasing the weight of the mouth part 4 and contributing to an increase in sound volume without cracking the sound as in the case of the thickening of the mouth part 4.

  The resonance tube 5 includes a sub tube 5a and a vibrating blade 5b.

  The sub pipe 5a is a cylinder of a cavity 5d having a liner 5c inside, like the lower pipe 3, and is slightly shorter than the lower pipe 3, the bottom is in the same position, and an adhesive or other connecting device ( For example, it is connected (contact portion 6) by bundling with a metal wire, screwing with screws 6a), and resonates with the sound of shakuhachi 2.

  Further, the upper and lower sides of the sub pipe 5a are sealed with a volume knob 7b and a jack box 7g described later. On the other hand, a hole is drilled on the back side at a position below the arranged microphone 7. Here, two holes 5e, 5f were drilled. Depending on the length of the secondary pipe 5a, the opening degree of the hole is appropriately optimized. If the opening of the hole is too wide or too narrow, the resonance is weakened.

  Although the vibration blade 5b is not essential, two sides are in contact with the inside of the sub-tube 5a to resonate and amplify the timbre. By providing the vibration blade 5b, the tone of the shakuhachi 2 is amplified, and the tone of the shakuhachi 2 can be collected effectively by the microphone 7. As a method for fixing the vibration blade 5b, screwing or the like can be exemplified by passing the screw 6a through the lower pipe 3 from the side surface of the sub pipe 5a. When the length is the same as that of the secondary pipe 5a, the maximum resonance can be obtained.

  Examples of the vibration blade 5b include wood, bamboo, plastic, and metal. The tone changes depending on the selected material of the vibration blade 5b. If the vibrating blade 5b is made of a soft material, for example, made of wood or bamboo, a soft tone is obtained, and if the vibrating blade 5b is made of a hard material, such as aluminum, a high tone is obtained.

  The resonance tube 5 thus configured can resonate and amplify the sound of the shakuhachi 2 to prevent sound cracking and generate a clear shakuhachi 2 tone from the speaker 8 at a high volume. The volume of the shakuhachi 2 solo in a large hall can be set.

  The microphone device includes a microphone 7, a volume knob 7b, a jack box 7g, and a plug 7c that is connected to the jack box 7g at one end, and a control box 7d that is connected to the amplifier 9 at the other end, and a lead wire that connects each of them. 7e. Noise can be reduced by arranging a sponge (not shown) on the sound collecting side of the microphone 7.

  Examples of the microphone 7 include a commercially available moving coil type, ribbon type, capacitor type, carbon microphone, piezoelectric microphone, and laser microphone. The vibration corresponding to the timbre of the shakuhachi 2 is converted into an electric signal 7a by wire and wireless, and a clear timbre is generated from the speaker 8 at a large volume. It is preferable that the microphone is provided with a volume knob 7b that can adjust the collected sound volume so that the sound volume can be operated at hand. In particular, a condenser-type microphone (condenser-microphone) is preferable from the viewpoint of sound collection sensitivity and volume operation. A noise reducing material, for example, a sponge 7h may be disposed on the sound collecting side of the microphone 7.

  The microphone 7 is fixed above the center in the vertical direction of the sub-tube 5a with the sound collection side facing downward. By fixing the microphone 7 at these positions, it is possible to collect sound at the maximum volume, and it does not interfere with finger operation and gripping without collecting wind noise.

  As shown in FIG. 1, the position of the microphone 7 is optimally about 1/5 to 1/4 of the total length of the sub pipe 5a from above the sub pipe 5a. For example, it is preferable that the distance (L) between the edge of the hole 5e of the sub-tube 5a next to the hole 3e on the back surface of the lower tube 3 and the sound collection surface of the microphone 7 is 3 cm or less. If the distance (L) between the microphone 7 and the hole 5e is too far away, even if the shakuhachi 2 is not being blown, the reverberation sound inside the sub-tube 5a, called “bow”, is collected. Therefore, more preferably, the sound collection surface of the microphone 7 is positioned at a distance (L) within 1 cm from the hole 5e on the side surface (rear surface here) of the sub-tube 5a, and further adjacent to the hole 5e (hole 5f). Let

  Here, two holes 5e and 5f are drilled in order to adjust the degree of resonance by the width of the hole. The number and size of the holes are the diameter of the secondary pipe 5a and the length of the secondary pipe. Depending on the case, it is appropriately selected. When there is no hole 5e (5f) and the upper and lower ends of the secondary pipe 5a are sealed, no sound can be obtained with the microphone 7.

  The electric shakuhachi 1 can be played in the same manner as a general bamboo shakuhachi. The electric shakuhachi 1 may be painted. Further, the lower tube 3 and the resonance tube 5 may be integrally formed.

  The electric shakuhachi 1 thus constructed fits in the hand, and the resonance tube 5 and the microphone 7 do not obstruct the finger movement, the strong breath, the sound is not broken, and the shakuhachi of a supreme healing tone. 2 is resonated with the resonance tube 5, further amplified with the vibration blade 5 b, and then returned to the electric signal 7 a with the microphone 7. It ’s good. The timbre can be widened and heavy, and can be played in the hall or solo. The volume is simply higher than when the sound is collected from the periphery of the shakuhachi 2, and wind noise due to breath does not occur.

  Since the electric shakuhachi 1 can use a commercially available vinyl chloride pipe, it can be easily manufactured because it is very inexpensive and easy to process. Of course, even with a shakuhachi made of plastic other than bamboo, wood, and vinyl chloride, a clear shakuhachi 2 sound can be generated from the speaker 8 at a large volume by fixing the microphone 7 in the same manner.

  In FIG. 6, the cross-sectional schematic diagram of the electric shakuhachi 1 was shown. Here, the microphone 7 shows an example of a condenser microphone. The sub pipe 5a is fixed because it is connected to the lower pipe 3 by the screw 6a.

  The upper and lower ends of the sub-tube 5a are sealed with an upper lid 7i and a lower lid 7k, respectively, and an inner cylinder 7m for fixing the microphone 7 is fixed inside. The vibrating blade 5b is slightly shorter than the lower end of the sub pipe 5a to secure a storage space for the jack box 7g.

  As shown in FIGS. 6B and 6C, the microphone 7 is fixed in the middle cylinder 7m that fits the inner diameter of the secondary pipe 5a, and the middle cylinder is slid and fixed at a predetermined position of the secondary pipe. It is good to do. At that time, when a space for passing the lead wire 7e is required, a wiring hole 7n is formed in the middle cylinder 7m. In FIG. 6B, illustration of the wiring located in the wiring hole 7n is omitted.

  The microphone 7 is variable in resistance and is connected to a volume knob 7b for adjusting the volume via a lead wire 7e, and the volume knob 7b is connected to a jack box 7g at the lower end of the sub-tube 5a via a lead wire 7f. A plug 7c connected to the speaker 8 is fitted into the jack box 7g.

  When the microphone 7 is a condenser microphone, a power source is required. Therefore, a control box 7 d containing a battery is provided between the plug 7 c and the amplifier 9. When the microphone 7 is a piezoelectric microphone, the power supply is not required, so the control box 7d is unnecessary.

  Thus, by arranging the microphone 7 in the sub-tube 5a, picking up sounds other than the shakuhachi tone is reduced. As a result, the howling phenomenon is further suppressed.

DESCRIPTION OF SYMBOLS 1 Electric shakuhachi 2 Shakuhachi 2a Joint 2b Through-hole 3 Lower pipe 3a Hole 3b Hole 3c Hole 3d Hole 3e Hole 3h Liner 3i Through-hole 4 Mouth part 4a Hook 4b Inclined part 4c Contact part 4d Inclined part 4e Notch 4f Inner cylinder 4g Outer cylinder 5 Resonant tube 5a Sub tube 5b Vibrating blade 5c Liner 5d Cavity 5e Hole 5f Hole 6 Adhering portion 6a Screw 7 Microphone 7a Electric signal 7b Volume knob 7c Plug 7d Control box 7e Lead wire 7f Lead wire 7g Jack box 7h Sponge 7i Upper lid 7k Lower lid 7m Middle cylinder 7n Wiring hole 8 Speaker 9 Amplifier 10 Shakuhachi sound system

Claims (4)

Shakuhachi,
An internal cavity that is connected to the side surface of the shakuhachi and resonates and amplifies the sound of the shakuhachi, the upper and lower ends are sealed, and a secondary tube that is a cylinder with a hole formed in the side surface;
A microphone fixed above the center in the vertical longitudinal direction of the sub-tube with the sound collection surface facing downward;
Electric shakuhachi, characterized by comprising Shakuhachi,
An internal cavity that is connected to the side surface of the shakuhachi and resonates and amplifies the sound of the shakuhachi, the upper and lower ends are sealed, and a secondary tube that is a cylinder with a hole formed in the side surface;
A microphone fixed above the center in the vertical longitudinal direction of the sub-tube with the sound collection surface facing downward;
A volume knob that seals the upper end of the sub-tube and adjusts the volume of the microphone;
A jack box which is provided by sealing the lower end of the sub-tube and is an output port of an electronic signal of sound from the microphone;
Electric shakuhachi, characterized by comprising The electric shakuhachi according to claim 1 or 2, wherein a hole on a side surface of the sub-tube is located within 3 cm below a sound collection surface of the microphone. A shakuhachi acoustic system, wherein the electric signal of the electric shakuhachi microphone according to any one of claims 1 to 3 is input to a speaker by wire or wirelessly.

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