JP5074624B1 - Sound pressure adjustment device for musical instruments with air leads - Google Patents

Abstract

An instrument having an air lead having a windway, a window portion, and an edge, which can be more easily mounted, has a low possibility of damage to the instrument, and can adjust a weak sound effect without changing the sound quality.
The sound pressure of sound generation is changed by inserting a low resilience elastic material that adjusts the functioning width of a windway and an edge required for sound generation from a window portion. The sound pressure can be lowered from a normal sound pressure to a silent sound, and since the processing range is not processed, a timbre that is not changed can be provided. Since the hard material is not used on the surface in contact with the musical instrument, the load on the recorder 1 is small, and the sound pressure can be adjusted by visual judgment of the amount of sound produced by simple attachment by simply wrapping the fixing belt 21.
[Selection] Figure 1

Description

  The present invention relates to a weak sound and sound pressure adjustment device for a wind instrument sound produced by an air lead having a windway such as a recorder, a window portion, and an edge. Ocarina, slide whistle, samba whistle, tin whistle, fradiolet, etc. that sound with the same mechanism, and even pipe organs with the same sounding mechanism, such as keyboard instruments, can achieve the same effect by using the same method I can do it.

  For brass instruments, a sound attenuator to be mounted in the bell has been proposed. For example, in the technique described in Patent Document 1, the sound emitted from the bell of a brass instrument is collected by a microphone and converted into an electric signal to detect the pitch, and the normal operation of the valve at this time is controlled by the valve. It is detected by a detector and converted into an electrical signal. The treble information and valve operation information are used to identify the treble that the performer is about to produce, and this treble signal is electrically generated as a standard treble, and the standard treble is sounded. The technology to radiate as is proposed.

  Patent Document 2 discloses a silencer mounted on a bell portion of a brass instrument, which includes a bottom portion and a trunk portion, and has a maximum inner diameter portion at the bottom portion. There has been proposed a technique that includes an exhalation discharge passage portion having a predetermined length to be discharged and suppresses propagation of sound waves to the outside by passage resistance of the exhalation discharge passage portion.

  In addition, as a silencer for woodwind instruments including the recorder of Patent Document 3, it is formed into a three-dimensional mesh-like porous cylindrical body in which mesh threads are randomly crossed and labyrinth-like voids are continuous inside. The silencer is detachably attached to the inside of the air hole between the air outlet and the first sound hole continuous to the instrument main body side of the air outlet toward the axial direction of the air hole. A silencer for a woodwind instrument to be installed in a pipe has been proposed.

  Woodwind instruments produce sound by reed vibrations or vibrations caused by the flow of air. A recorder is an aerating instrument having an air lead having a window portion and a windway portion, which is pronounced by vibration caused by the flow of air. Unlike a brass instrument, a woodwind instrument with a number of holes in the tube cannot achieve the effect of sound attenuation or mute when the bell part is treated like a brass instrument. Therefore, a weak sound has been devised by attaching a member or device to the window, windway or edge as the air lead.

  Patent Document 4 is a weak sound member that is attached to the window portion of a woodwind instrument having an air lead having a window portion and a windway portion, and that reduces the sound pressure of the performance sound of the woodwind instrument, and has a thickness of the windway portion. A slit formed in a plate-like member thinner than the window portion and inserted into the windway portion, the slit extending in the direction from the front end portion to the rear end portion of the plate-like member. There has been proposed a low noise member including a formed insertion portion and a flange portion provided at a rear end portion in the insertion direction of the plate-like member of the insertion portion.

  Patent document 5 is provided with a window part partly divided by an edge suitable for generating an air vortex by air blown from the windway of the recorder, and the sound absorber is blown air flowing toward the edge. With a partially delimited window, the sound dampener is characterized by a barrier that prevents the flow of air blown into the edge. This sound attenuator has an advantage that it can be adjusted so that the degree of relaxation of the sound of the recorder can be selected as necessary. It is said that if this sound attenuator is adjusted to the maximum relaxation position, the recorder can be played without disturbing the neighborhood even at night.

  Special table 2007-171249 gazette   JP 2008-96498 A   JP 2010-85960 A   Special table 2009-524090   JP 2010-223982 A

  As described above, sound attenuators that reduce various sound pressures have been developed for brass and woodwind instruments, but for instruments with an air lead that has a windway, window and edge, it is easier to install and Less chance of damage. Furthermore, it is preferable to have an apparatus that can adjust the sound attenuation effect.

In recent years, recorders are often used as educational materials at schools, and as a result, practice as a task is often done at home, but the sound during practice becomes a nuisance to the neighborhood, so I want to make it as small as possible Is. In addition, it is preferable that the tone color, pitch, pitch, etc. are not changed as much as possible as the practice environment.
At the same time, it is assumed that children are frequently used, and it is an object to be able to adjust the volume by simple visual judgment using a material with little damage to the instrument by operating the device.

Enables installation on all commercially available recorders.

  When worn during normal performance or practice, players need to check their fingering. The purpose is not to obstruct this work or view.

  If this device can be used not only for practice that requires a low volume, but also when playing at normal volume, it can be handled only by changing the sliding position without attaching and detaching, and the possibility of loss is reduced. I can do it.

  When cleaning the recorder, it makes a loud sound to breathe stronger than Beck and remove excess saliva and other moisture from the bell below the foot tube.

  The same effect can be achieved with other air lead instruments other than recorders that have a windway, windows, and edges and that sound in the same mechanism.

  The mechanism that produces sound from the recorder is that a vortex is generated when the air blown from the beck hits the tip of the edge through the windway, causing the air in the tube to vibrate and sound. If the amount of the series of flows can be adjusted, it is possible to adjust the sound pressure in the same way as adjusting the amount of air vortex to be generated.

Therefore, the present invention is a wind instrument having an air inlet and an air outlet, and a musical instrument having an air lead having an edge arranged with a window portion on the downstream side of the air outlet of the windway, The sound pressure can be reduced by providing a width that is inserted into the window and perpendicular to the air flow direction of the air outlet of the windway, and a slidable blocking portion that adjusts the width of the window and the edge. Made adjustment possible. In addition, since the range where the edge that determines the timbre sounds is not disturbed, the timbre can be provided unchanged.

  The movable air blocking part closes the window, the windway and the edge from either side at approximately the same rate, so the sound pressure decreases as the open part decreases, and the sound pressure can be increased as it increases. Therefore, even a child can easily adjust the sound pressure, and since there is no processing in the sounding part that is not cut off, it is possible to make the sounding without changing the timbre. Since the soft touch material such as low-resilience urethane material, nylon, and Teflon sheet is used for the part that touches the instrument directly, the burden on the instrument is small. At the same time, the use of these materials facilitates processing and increases additional elements such as printing, coloring and design.

  However, when this device is installed, the pitch is reduced by about a semitone, but the pitch of the recorder is usually adjusted by adjusting the length of the tube by inserting and removing the joint between the head tube and the middle tube. If the recorder has a joint length within the adjustable range, the pitch can be adjusted and played.

  According to the present invention, it is possible to mount regardless of the shapes of various windways, windows, and edges that are different due to the pursuit of timbre and ease of manufacture. This is because the material that closes the windway, the window portion, and the edge is a soft low-resilience elastic material, so that it flexibly adheres and exhibits the effect.

  The material of the air barrier used to solve the above problems is to block the flow of air, for example, low resilience flexible polyurethane foam, to have sound insulation, cushioning, and shape memory Use what you have. The surface that comes into contact with the instrument is slid to adjust the volume, so it is a material with low frictional resistance, and it is a material that does not absorb water in consideration of the saliva and moisture due to the performance, trying to follow the uneven surface of the material that blocks air For example, a Teflon sheet is bonded to the material for blocking air or coated with a material having a similar effect. These materials efficiently close the windway, windows and edges, and are attached using a woven double-sided fastener or a material such as elastic rubber as a fixing belt that is easy to fine-tune.

  According to the present invention, since there is no projecting part and it is compact, it is possible to perform comfortably without disturbing the visual field when checking finger usage during performance or practice.

  A frame using a square can with a width that does not interfere with the windway, the window portion, and the edge is provided in a portion adjacent to the low-rebound elastic soft material that blocks the flow of air. Since there is no air resistance in this frame, it is possible to perform as usual. At the same time, this frame allows the soft low-rebound elastic soft material to slide smoothly, serves as a confirmation window when the sound volume is judged visually, and also serves as a belt receiver for fixing to the recorder.

  The material of the square can is either metal or plastic, but it is preferable that it does not rust in consideration of the humidity contained in exhaled breath.

  According to this invention, if the volume adjusting device is attached so that the width of the air blocking portion is more marginal than the window portion so that the windway, the window portion, and the edge are completely blocked by the silencing effect portion, the sound is not generated. Since this is only the sound that passes through, this effect can be used for easy cleaning.

  According to the present invention, in all musical instruments having an air lead having a window portion, a windway portion, and an edge as a squealing instrument, the windway and edge width that can be generated without changing the sound quality are minimized to the maximum. You can adjust the volume up to. For example, ocarina, slide whistle, samba whistle, tin whistle, fradiolette, etc. that sound in the same way are possible in the same way. As for ocarina, it is not a cylindrical shape, so it becomes a sound attenuator based on the same concept by changing the fixing belt. Furthermore, although it is a keyboard instrument, it is possible to adjust the volume in the same way even if it is a pipe organ with the same sounding mechanism, but it is the same in combination with the method of sliding all at once because there are many numbers The effect of can be obtained.

  The present invention thus devised can be modified in many ways by considering other materials and sizes having the same properties, and all such changes and modifications are included in the concept of the present invention.

The perspective view which shows one Embodiment of this invention Front view showing the appearance of the weak sound pressure adjustment device Side view showing the appearance of the weak sound pressure adjustment device Front view showing cutting line of recorder head tube AA side cross-sectional view of the recorder head tube equipped with a low sound pressure adjustment device BB vertical cross section of the recorder head tube with a weak sound pressure adjustment device A perspective view in the middle of mounting a weak sound pressure adjustment device to the head tube of the recorder A perspective view in the middle of mounting a weak sound pressure adjustment device to the head tube of the recorder Perspective view after the low sound pressure adjustment device is attached to the head tube of the recorder Front view of recorder head tube Front view with a low sound pressure adjustment device attached to the recorder head tube to reduce sound pressure Front view with the sound and sound pressure adjustment device attached to the recorder head tube with the window and edges fully open Front view of the recorder head tube with a weak sound pressure adjustment device, with the window and edges completely closed Front view showing the cutting line of the windway CC cross section of straight windway CC cross section of arched windway A perspective view of the ocarina with a low sound pressure adjustment device

  One embodiment of the present invention is shown in FIG. FIG. 2 is a front view and FIG. 3 is a side view of the weak sound pressure adjusting device 2 shown in FIG. An exhalation blocking unit 23 for blocking exhalation from the windway 14, a fixed belt 21 capable of adjusting the sound pressure by sliding the exhalation blocking unit 23, the exhalation blocking unit 23, a friction reducing unit 24 between the musical instruments, and expelling the exhalation and further sound pressure. It is comprised by the square can 22 for judging visually.

  FIG. 4 shows a cutting line in a diagram when the weak sound pressure adjusting device is mounted. As shown in FIG. 5 of the AA side cross-sectional view, the exhalation blocker 23 blocks exhaled gas flowing out from the windowway 14 through the window 16, and simultaneously blocks exhaled gas that flows into the edge 17. 6 shows that the windway 14 is inserted from the window 16 and the exhalation is partially blocked by the exhalation blocking unit 23.

  Exhalation from the windway 14 that is not blocked by the exhalation blocker 23 passes through the window portion, and further strikes the edge of the reference numeral 17 in the exhalation outflow direction to generate an air vortex to generate sound. The vortex of air generated by the edge 17 where the exhalation reduced by the exhalation blocking unit 23 is further reduced by the exhalation blocking unit 23 is reduced, and the sound pressure is reduced. With the above-described mechanism, it becomes possible to adjust the sound pressure by the rate at which the exhalation blocker 23 prevents the sound generation, the generation of air vortices related to sound generation increases with the increase in the open portion, and the sound pressure increases, On the other hand, if the open part decreases, the generation of air vortices decreases and the sound pressure decreases.

  As described above, the method of attaching the weak sound pressure adjusting device 2 indicates that it is attached by a series of operations as shown in FIGS. A belt is wound around the window 16 at a position that satisfies the requirements of FIG. 5 and FIG. While confirming the open and closed state of the windway 14 and the edge 17 of the belt, the exhalation blocking part 23 is inserted through the window part and turned back so that the front end of the belt passes and the woven double-sided surface fastener that is the material of the belt is bonded. Use to fix.

  FIG. 10 is a front view of the recorder head tube and shows a state before the weak sound pressure adjustment device 2 is attached. FIG. 11 to FIG. 13 show the effect of use of the low sound pressure adjustment device 2 by sliding. FIG. 11 is a view in which the weak sound pressure adjusting device 2 is attached to the method shown in FIG. The inflow of exhaled air into the window portion 16 and the edge 17 is used as a guideline for sound pressure adjustment while being visually determined within the square can frame. FIG. 12 shows a state in which the exhalation outflow from the windway 14 and the exhalation inflow to the window portion 16 and the edge 17 are completely released using the square can 22, and the performance as usual without being removed by only sliding the device. It is the figure which showed that it was possible. FIG. 13 is a state in which the exhalation outflow from the windway 14 and the exhalation inflow to the window portion 16 and the edge 17 are completely closed, and noise is prevented when the exhalation is blown strongly and saliva is discharged during cleaning of the recorder.

  FIG. 14 shows a cutting line of the recorder beck 15. There are different types of recorder windways in order to provide timbre characteristics. FIG. 15 is a straight windway and FIG. 16 is an arch type windway in the C-C longitudinal section. Even if the weak sound pressure adjusting device 2 has a slightly different shape as shown in FIGS. 15 and 16, the material of the exhalation blocking portion 23 is a flexible low-rebound elastic material because of the structure of the device. It is possible to obtain In addition, there is a wide range that can accommodate some changes in shape and different sizes depending on the manufacturer and part of the range.

  Since the head tube 11, the middle portion 12, and the foot tube 13, which constitute the instrument body shape, are all cylindrical, there is no sense of stability and often rolls and falls from the desk. As a result, irregularities were formed in the shape, making it difficult to roll and easier to handle.

  Furthermore, it is possible to add value as a decoration visually by providing variations in colors and patterns on the fixed belt. Functionality can be used to distinguish from others in places such as schools.

  Next explained is the second embodiment of the invention. FIG. 17 is a perspective view in which a weak sound pressure adjusting device is mounted on an ocarina which is one of air lead musical instruments that generate sound with the same mechanism. Ocarina is not a cylindrical shape, so changing the fixing belt will result in a sound attenuator based on the same concept. Considering that the rubber belt 31 does not block the sound hole 18 in the upper half 3a, in the lower half 3b, the edge portion is circular, and the expiratory air radiates from the windway 14 to the edge 17 to generate air vortex. Therefore, the sound pressure is lowered by sliding the ocarina dedicated exhalation blocking section 32 according to the fulcrum 35 when the ocarina dedicated fixed rubber / belt exhalation blocking section slides.

The material of the ocarina dedicated exhalation blocker 32 is preferably the same low rebound soft material as in the first embodiment. In addition, the low friction part 24 is not required from the operation at the time of movement. The sound pressure can be adjusted by adjusting the exhalation outflow width from the windway 14 at the window and the exhalation inflow width to the edge under the same conditions as in the first embodiment. The material of the ocarina-specific fixed rubber / belt used at this time is preferably a silicone material that is viscous and adheres to the main body and can be fixed to the belt itself, and a thin material that does not easily block the sound hole 18 is preferable.

  In addition, the slide whistle, samba whistle, tin whistle, fradiolet, etc. that sound with the same mechanism can be adjusted with low sound pressure by changing the size somewhat with the same structure and method as in the first embodiment. . Furthermore, although it is a keyboard instrument, it is possible to adjust the volume in the same way even if it is a pipe organ with the same sounding mechanism, but it is the same in combination with the method of sliding all at once because there are many numbers The effect of can be obtained.

  This weak sound pressure adjusting device 2 is capable of adjusting the sound pressure, not just the weak sound, so that the position of the air lead musical instrument at the time of ensemble also changes. It may be possible to perform ensembles with other musical instruments that have never existed before, and this will help music expression to explore new performance genres as well as weak sounds for practice.

DESCRIPTION OF SYMBOLS 1 ... Recorder, 2 ... Weak sound pressure adjustment apparatus, 3a ... Ocarina upper half, 3b ... Ocarina lower half, 11 ... Head pipe, 12 ... Middle pipe, 13 ... Foot tube,
14 ... Windway, 15 ... Beck, 16 ... Window, 17 ... Edge, 18 ... Stone hole, 21 ... Fixing belt (woven) Double-sided surface fastener), 22 ... Square can, 23 ... Exhalation blocking part (low resilience flexible polyurethane foam), 24 ... Low friction part (Teflon sheet), 31 ... Ocarina fixed rubber Belt (silicone rubber), 32 ... Ocarina dedicated exhalation block, 35 ... Exhalation block when sliding

Claims (2)

A windway having an air inlet and an air outlet, and a musical instrument having an air lead having an edge arranged on the downstream side of the air outlet of the windway and inserted into the window The width of the window outlet and the width of the window section and the width of the edge that are perpendicular to the air flow direction of the air outlet of the windway are adjusted, the air flow is blocked, the sound insulation is provided, and the cushioning is provided. A sound pressure adjusting device having a blocking part made of shape memory . To block the air outlet from the windway and simultaneously block the exhaled air that flows into the edge, the fixed belt that slides this to adjust the sound pressure, and escapes the exhaled air to make the sound pressure visible The sound pressure adjusting device according to claim 1 , comprising a square can .

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