JP2006162715A - Silencer for woodwind instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new silencer for woodwind instrument, which has a markedly high sound absorbent effect with natural blowing feeling compared with a conventional one, and which is provided with sufficient measures against moisture. <P>SOLUTION: The silencer for a woodwind instrument has a hard case made of plastics or the like which includes all the tone holes of the musical instrument and can freely be opened/closed; is structured to have a sound absorbing layer on the inner side of the case such as fiber excellent in moisture and water absorption; has a mechanism fixing the musical instrument almost at the center in the case internal space; and is provided with elastic and sealable hand holes through which a player directly operates the keys of the musical instrument by putting the right and left hands into the case from the outside. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a silencer for woodwind instruments.

  Even with the same wind instrument, a brass instrument whose sound outlet is only the bell part can be silenced by installing a sealed silencer inside the bell. On the other hand, woodwind instruments have many sound holes in the tube, and sound is emitted from all the sound holes, so even if a closed silencer is installed inside the bell as with brass instruments, It is impossible to mute.

  Historically, there was a method to obtain a soft sound effect by inserting a soft cloth or paper inside the tube of a woodwind instrument, but the problem was that the sound deadening rate was insufficient, causing unevenness of the sound, or breathing difficulty Have Moreover, about the name of a silencer, a weak sound machine, a mute etc., it does not strictly distinguish.

  A conventional saxophone silencer bag is shown in Conventional Example 1. FIG. 5 is an explanatory view of the conventional example 1 as viewed obliquely from above. This method can be considered as a method of transmitting the internal sound and attenuating the sound, but has a serious drawback that the silencing effect is not sufficient, the pitch of the low range is poor, and the pronunciation itself is difficult. Actually, before the sound is attenuated by transmitting the sound, the sound that has not been silenced leaks from the gaps that exist in each part of the silencer at a large volume, and the silencing effect is not sufficient. The phenomenon that the pitch of the low frequency range is bad and the pronunciation itself is difficult is due to the structure of the silencer interior that is set easily, the structure in which the position of the instrument cannot be fixed in the bag, the structure with many gaps and poor sealing, Since another acoustic mode that adversely affects the natural standing wave is likely to occur, the pitch and pronunciation are deteriorated.

As shown in FIG. 6 of the conventional example 2, a form in which a musical instrument is put inside a cylindrical body in which a cylindrical foam polystyrene is wound with a rubber sound insulation sheet is also seen, but since there are many gaps in each part, There is a serious drawback that loud sound leaks out. Moreover, the device is huge and heavy, and above all, it is impossible to play the instrument in a normal posture.
Japanese Patent Laid-Open No. 10-113209 Japanese Patent Laid-Open No. 06-214559

  A conventional silencer for woodwind instruments has a structure in which a loud sound generated inside the silencer leaks to the outside, so that the silencing rate is not sufficient. In addition, since the acoustic space inside the silencer can be easily set and the instrument cannot be fixed at an appropriate position in the acoustic space inside the silencer, the pitch and pronunciation become unstable and natural. I can't get a feeling of blowing. In addition, measures against moisture contained in the exhalation of the performer are insufficient. Therefore, the problem to be solved by the present invention is to provide a new silencer for woodwind instruments that is improved in silencing performance, improved in natural wind sensation, and has sufficient moisture countermeasures.

  The present invention is a muffler for woodwind instruments that produces sound using reeds, and uses a musical instrument or a mouthpiece as it is used as it is. In order to solve the problem of obtaining a silencing effect, a hard case made of plastic that can be opened and closed that encloses all the sound holes of a musical instrument, etc., and fibers that are excellent in moisture absorption and water absorption on the inner surface of the case With a structure that arranges the sound-absorbing layer, it has a mechanism that can fix the instrument in the approximate center of the internal space of the case, and it can be extended and retracted so that the player can directly operate the keys of the instrument by putting the right and left hands from the outside of the case A means is to provide an access port that can be sealed.

  The silencer for woodwind instruments according to the present invention can be used as it is with everyday instruments, mouthpieces, etc., can be played with a natural wind sensation, has sufficient silencing performance, and is fully transportable against moisture caused by exhalation. Therefore, it is possible to provide an innovative silencer for woodwind instruments where you can enjoy playing woodwind instruments anytime and anywhere. In particular, the saxophone generates a loud sound equivalent to that of a brass instrument, and is easily disturbed in the neighborhood, but if the silencer of the present invention is used, the musical instrument performance can be enjoyed without hesitation.

  In order to obtain a much higher muffler effect compared to conventional products using natural instruments and mouthpieces as they are, it can be opened and closed to include all the sound holes of the instrument. A structure that has a hard case made of plastic, etc., and a sound absorbing layer such as fiber that absorbs moisture and absorbs water on the inner surface of the case. It is realized with a form that has a retractable and sealable access port that allows the performer to directly operate the keys of the instrument by putting the right and left hands from the outside of the housing.

  FIG. 1 is a side view of a silencer for a woodwind instrument according to a first embodiment of the present invention as viewed from the right side. 1 is the right shell, 2 is the right mouth, 3 is the strap ring, 4 is the butterfly board, 5 is the patchon lock, 6 is the alto saxophone, 7 is the mouthpiece, 8 is the lead, 9 is the ligature, 10 is the first sound hole , 11 is a neck packing. The right acquisition port 2 is made of closed-cell foamed EPDM or the like, so that it can expand and contract. Therefore, the performer can directly operate the keys of the musical instrument with the right hand and the left hand in a sealed state. 2, 3, 4, 5, and 6, the same reference numerals indicate similar parts.

  FIG. 1 shows a case where the present invention is implemented as a silencer for an alto saxophone. In this case, the height H of the silencer is 720 mm and the width W is 320 mm. However, if the outside of the musical instrument is simply covered with the member, good pitch and sound cannot be obtained. In particular, regarding the pitch and sound generation in the low range, it is necessary to set the inner diameter shape of the silencer so as not to adversely affect the standing wave inside the instrument.

  FIG. 2 is a cross-sectional view taken along the line A in FIG. The same numbers as those in FIG. 1 indicate the same parts. 12 is a left shell, 13 is a left acquisition port, 14 is a right sound absorbing layer, 15 is a left sound absorbing layer, 16 is a neck support base, 17 is a convex packing, 18 is a concave packing, 19 is a magic tape, 20 is a neck, and 21 is a neck. It is a vent. 3, 4, 5, and 6, the same numbers indicate similar parts.

  The depth D is 240 mm. The end of the standing wave inside the musical instrument can be said to be approximately the position of the sound hole, but the lower the sound, the longer the wavelength, and a sufficient space around the sound hole that is the open end is required. Insufficient space results in a negative effect on pitch and pronunciation. In addition, when the silencer has a high degree of sealing, the breath blown by the performer may lose the escape route and feel breathless. In such a case, the vent 21 may be provided. The size, position, and number of the vents 21 may be set as appropriate in consideration of noise reduction efficiency and breathlessness.

  In addition, inside the silencer, which is a closed space, the sound wave radiated from the sound hole hits the inner wall of the silencer nearby, causing the sound wave to be reflected, and the reflected wave adversely affects the standing wave inside the instrument. There is a case. Therefore, in a structure where the position of the musical instrument moves in the silencer internal space, the sound is not stable. Therefore, it is necessary to provide several mechanisms that can fix the musical instrument in the approximate center of the internal space of the casing in the same manner as the neck support 16 and keep the position of the musical instrument constant. In addition, since the reflected wave becomes stronger as the sound wave is harder, and depending on the physical properties of the material used for the sound absorbing layer, the amount of reflected sound and the direction of the sound wave are strongly affected. In addition to the structure and sound range of the instrument, the physical properties of the shell and sound absorbing layer must be taken into account. In other words, the shape of the internal acoustic space of the silencer that does not adversely affect the standing wave inside the musical instrument can be obtained only after setting various conditions.

  The sound absorbing layer of the present invention has an important role in addition to the role of suppressing the above-described reflected wave. The first function is to increase the silencing effect by suppressing sound absorption and shell vibration. The second is a function of strongly absorbing moisture contained in exhaled breath due to the performance of the performer because of its very high moisture absorption and water absorption performance. Moisture that has been sucked up for a long period of practice is temporarily held in the sound-absorbing layer, but if left in a dry state, the sucked-up moisture is released into the air and can be used over and over again. Polyacrylates are effective for moisture absorption, and acrylic fibers are effective for water absorption, but mixtures thereof are most effective. Further, if the right sound absorbing layer 14 and the left sound absorbing layer 15 are made detachable with the magic tape 19 or the like, washing becomes possible and it is hygienic.

  FIG. 3 is a lateral view of the second embodiment of the present invention as viewed from the right side. The second embodiment shows a case where an electronic module is added to the first embodiment to pick up sound inside the housing with a microphone and return it to the performer. 22 is an electronic module, and 23 is an earphone. Also in FIG. 4, the same numbers indicate similar parts.

  FIG. 4 is a cross-sectional view of the second embodiment of the present invention shown in FIG. Reference numeral 24 denotes a microphone, 25 a microphone packing, 26 a microphone hole, and 27 a fixing screw. A microphone hole 26 corresponding to the microphone 24 is provided in the right shell 1, the inside air of the housing is prevented from leaking out by the microphone packing 25, and the electronic module 22 is fixed by the fixing screw 27. Further, if a reverberation circuit or an external input / output mechanism is added to the electronic module 22, karaoke performance and monitoring can be performed, and the enjoyment of performance increases.

  The present invention can be used to provide mufflers for saxophones such as soprano, tenor and baritone, but it can also be applied to other woodwind instruments such as clarinet, oboe, bassoon, etc. Sex is great.

It is a side view of the silencer for woodwind instruments of the present invention. Example 1 It is sectional drawing of the silencer for woodwind instruments of FIG. Example 1 It is a side view of the silencer for woodwind instruments of the present invention. (Example 2) It is sectional drawing of the silencer for woodwind instruments of FIG. (Example 2) It is a perspective view of the prior art example of the silencing bag for saxophones. (Conventional example 1) It is a perspective view of the prior art example of the cylindrical silencer for woodwind instruments. (Conventional example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Right shell 2 Right acquisition port 3 Strap ring 4 Butterfly board 5 Patchon lock 6 Alto saxophone 7 Mouthpiece 8 Lead 9 Ligature 10 First sound hole 11 Neck packing 12 Left shell 13 Left acquisition port 14 Right sound absorption layer 15 Left sound absorption layer 16 Neck support 17 Convex packing 18 Concave packing 19 Magic tape 20 Neck 21 Vent 22 Electronic module 23 Earphone 24 Microphone 25 Microphone packing 26 Microphone hole 27 Fixing screw

Claims (2)

  A silencer for woodwind instruments that emits sound using reeds, which has a hard casing made of plastic that can be opened and closed and that contains all the sound holes of the instrument. With a structure that has an excellent sound absorbing layer such as fiber, it has a mechanism that allows the instrument to be fixed at the approximate center of the internal space of the enclosure, and allows the player to directly operate the instrument's keys by putting their right and left hands from the outside of the enclosure. A silencer for woodwind instruments, characterized by having a retractable and sealable access port.   2. A silencer for woodwind instruments according to claim 1, further comprising an electronic module for picking up sound inside the silencer with a microphone and returning it to the performer.

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