JP6439534B2 - drum - Google Patents

Description

  The present invention relates to a drum.

Generally, in an acoustic drum, sound is generated by hitting a drum head. The timbre of the generated sound is mainly determined by the rise of the moment of hitting, called an attack sound, and the free damping of drum head vibration, called sustain (sound extension).
When playing a drum, it may be necessary to adjust the attack sound and sustain as described above, depending on the application such as the genre of music and the place where the drum is played. Examples of the sound generated by the drum that is considered to be good include a sound that has a good attack sound and that the sustain of the overtone of the generated sound attenuates at an appropriate length.

Conventionally, a device for adjusting the sustain of harmonics has been proposed.
For example, Patent Documents 1 and 2 disclose a structure in which various mute members are attached to the outer peripheral area of the drum head striking surface or the surface opposite thereto. In these structures, the sustain of overtones can be shortened by suppressing the vibration in the outer peripheral region of the drum head when the drum head is hit by the mute member.
Non-Patent Document 1 discloses a structure in which silicon is filled in a concave portion of a folded portion of an edge of a metal shell (body portion). In this structure, the loss of the overtone can be shortened by increasing the loss of the shell edge by silicon and suppressing the vibration of the outer periphery of the drum head.

US Pat. No. 5,637,819 US Pat. No. 4,589,323

“Soul Toul Produce Snare Drums”, [online], Hoshino Gakki Co., Ltd. [searched on January 21, 2015], Internet <URL: http://www.tamadrum.co.jp/japan/products/snare/ soul_signature_snare / index.html〉

  However, in the structures of Patent Documents 1 and 2, the vibration mode of the drum head is greatly changed as compared with a normal drum without a mute member. Further, the vibration of the drum head continues to be suppressed by the mute member from the moment the drum head is struck until the generated sound attenuates and disappears. For this reason, there is a problem that the tone color of the sound generated by the drum using the mute member is greatly different from the tone color of the sound generated by the normal drum, that is, the original tone color of the drum is lost.

  Further, in the structure of Non-Patent Document 1, it is necessary to increase the filling amount of silicon in the edge portion of the shell in order to enhance the vibration damping effect of the shell, that is, in order to shorten the sustain of harmonics. In this case, it is necessary to form a large concave portion of the shell by changing the shape of the shell or the like, which may result in a redundant structure.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a drum capable of shortening the sustain of harmonics with a simple structure without impairing the original tone of the drum. .

In order to solve the above-described problems, a drum according to the present invention includes a drum portion, and a sound absorbing member attached to a folded portion that is bent radially inward with respect to a main body portion of the drum portion. .
In the above drum, in a state where the drum head is attached to the opening of the body portion, the outer peripheral area of the film portion of the drum head disposed inside the opening of the body portion faces the suction member attached to the folded portion.

According to the present invention, the overtone radiated with the vibration of the outer peripheral region of the film part can be absorbed by the sound absorbing member, and the vibration attenuation of the outer peripheral region of the film part can be accelerated, so that it is radiated to the outside of the drum. Overtone sustain can be shortened.
Further, according to the present invention, since the sound absorbing member does not come into contact with the drum head, it is possible to shorten overtone sustain without impairing the original tone color of the drum.
In addition, according to the present invention, since a simple structure in which the sound absorbing member is attached to the trunk portion is adopted, it is possible to adjust the degree of shortening the harmonic sustain without changing the shape of the trunk portion.

It is sectional drawing which shows the snare drum which concerns on 1st embodiment of this invention. It is an expanded sectional view which shows the principal part of the snare drum of FIG. It is an expanded sectional view which shows the modification of the snare drum of FIG. It is an expanded sectional view showing the important section of the snare drum concerning a second embodiment of the present invention. It is an expanded sectional view which shows the modification of the snare drum of FIG. It is an expanded sectional view showing the important section of the snare drum concerning other embodiments of the present invention. It is an expanded sectional view showing the important section of the snare drum concerning other embodiments of the present invention.

[First embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the drum according to this embodiment is a snare drum 1, which is attached to a cylindrical shell (body portion) 2 and a first opening of the shell 2 and used as a striking surface. A butter head (drum head) 3A and a snare side head (drum head) 3B attached to the second opening of the shell 2 are provided. In the following description, the butter head 3A and the snare side head 3B may be referred to as the drum head 3.

A head portion 21 of the drum head 3 to be described later is pressed against the edge portion 11 of each opening of the shell 2. The edge 11 of each opening has an inclined inner surface 13 that inclines in the axial direction of the shell 2 from the tip 12 toward the radially inner side of the shell 2. The inclined inner surface 13 faces the outer side in the axial direction of the shell 2.
The shell 2 may be made of wood, for example, but is made of metal in this embodiment. For this reason, in this embodiment, the edge part 11 of each opening of the shell 2 has the plate-shaped folding | returning part 15 bent by the radial inside with respect to the main-body part 14 of the shell 2 formed in the cylinder shape. The folded portion 15 extends while being inclined inward in the axial direction of the main body portion 14 toward the inner side in the radial direction with respect to the main body portion 14. Thereby, one surface (main surface) 15a (hereinafter referred to as the first surface 15a) of the folded portion 15 forms the inclined inner surface 13 described above.

Each drum head 3 of the butter head 3 </ b> A and the snare side head 3 </ b> B includes a head portion 21 having a circular shape in a plan view made of a film such as PET (polyethylene terephthalate). The head portion 21 has a film portion 22 disposed inside the edge portion 11 of each opening of the shell 2 in a state of being attached to each opening of the shell 2. The film part 22 is a part that vibrates effectively when the film part 22 of the butter head 3A is hit. In the following description, the film part 22 is referred to as an effective vibration film part 22.
The drum head 3 includes a fresh hoop 23 that is connected to the outer edge of the head portion 21 and holds the head portion 21 in a circular shape in plan view. The inner diameter dimension of the fresh hoop 23 is set larger than the outer diameter dimension of the shell 2.

In addition, the snare drum 1 applies tension to the effective vibration film portion 22 by sticking the snappy 4 that is selectively pressed against the snare side head 3B and the head portion 21 of each drum head 3 to each opening of the shell 2. A tensioning unit 5;
The tension part 5 is configured by a conventionally known lug (not shown), a hoop 31 and a tuning bolt (not shown). In this configuration, by tightening the tuning bolt screwed to the lug, the hoop 31 moves the fresh hoop 23 of the drum head 3 from one opening side of the shell 2 to which the drum head 3 is attached toward the other opening side. Energize. As a result, tension is applied to the effective vibration film portion 22.

The snare drum 1 of this embodiment includes a sound absorbing member 6 attached to the inner peripheral portion of the shell 2. The inner peripheral portion of the shell 2 is not only the inner peripheral surface of the shell 2, but also the edge of the opening of the shell 2 located inside the shell 2, the region near the inner peripheral surface of the shell 2 (for example, the shell 2 is its axis) A region on the radially inner side of the inner peripheral surface of the shell 2 that overlaps with the outer peripheral region of the effective vibration film portion 22 when viewed from the direction.
The sound absorbing member 6 only needs to convert part of the sound into heat energy and absorb it, for example, urethane formed in a porous shape having a large number of bubbles (open cells) continuous from the inside to the surface, It may be felt.

The sound absorbing member 6 is arranged with an interval inward in the axial direction of the shell 2 with respect to the opening of the shell 2, and is directed outward in the axial direction of the shell 2 from the opening of the shell 2. That is, the sound absorbing member 6 is attached to the shell 2 from the inner side of the shell 2 so as to face the outer peripheral region of the effective vibration film portion 22 of the drum head 3 attached to the opening of the shell 2.
In the present embodiment, the sound absorbing member 6 is attached to the inclined inner surface 13 of the edge 11 of the shell 2 by adhesion or the like. In this state, there is a gap between the sound absorbing member 6 and the outer peripheral region of the effective vibration film portion 22. The sound absorbing member 6 does not contact the outer peripheral region of the effective vibration film portion 22 even if the effective vibration film portion 22 vibrates.

The sound absorbing member 6 may be disposed only on the inclined inner surface 13 as shown in FIG. 2, for example, but may protrude from the radially inner end of the shell 2 to the radially inner side of the shell 2. Good.
The sound absorbing member 6 may be attached to the entire circumferential direction of the inclined inner surface 13, for example, but may be attached to only a part of the circumferential direction, for example. For example, only one sound absorbing member 6 may be attached to the inclined inner surface 13, but a plurality of the sound absorbing members 6 may be arranged at intervals in the circumferential direction of the inclined inner surface 13, for example.
FIG. 2 illustrates a structure in which the sound absorbing member 6 is disposed at a position facing the outer peripheral area of the effective vibration film portion 22 of the butter head 3A. For example, in the outer peripheral area of the effective vibration film portion 22 of the snare side head 3B, The sound absorbing member 6 may be disposed at the facing position.

  According to the snare drum 1 of the present embodiment, when the effective vibration film portion 22 vibrates by hitting the butter head 3A with a drum stick or the like, the overtone radiated along with the vibration of the outer peripheral region of the effective vibration film portion 22 is generated. While absorbing sound by the sound absorbing member 6, it is possible to accelerate vibration attenuation in the outer peripheral region of the effective vibration film portion 22. For this reason, the sustain of the overtone radiated to the outside of the snare drum 1 can be shortened.

If this point is described in detail, the vibration of the effective vibration film portion 22 in the outer peripheral region mainly causes overtone emission, so that the sound absorbing member 6 can effectively absorb overtones of the emitted sound.
Further, the vibration of the effective vibration film portion 22 is greatly influenced by the vibration of the surrounding air (this is referred to as structural acoustic coupled vibration), but the sound absorbing member 6 faces the outer peripheral region of the effective vibration film portion 22. If the sound absorbing member 6 is disposed, the sound absorbing member 6 changes the vibration mode of the surrounding air accompanying the vibration of the outer peripheral region of the effective vibration film portion 22. For this reason, the vibration of the outer periphery area | region of the effective vibration film | membrane part 22 is suppressed by the influence of structural acoustic coupling vibration, and the vibration attenuation | damping of the outer periphery area | region of the effective vibration film | membrane part 22 can be advanced. Therefore, it is possible to shorten the sustain of the overtone radiated to the outside of the snare drum 1.
Since the snare drum 1 often requires a tightened sound, it is very effective to shorten the sustain of the overtones to prevent unnecessary overtones. Further, in the snare drum 1, since the butter head 3A is vibrated greatly by being hit with a drum stick or the like, attaching the sound absorbing member 6 to the edge 11 of the first opening of the shell 2 to which the butter head 3A is attached is It is very effective.

Further, according to the snare drum 1 of the present embodiment, since the sound absorbing member 6 does not contact the drum head 3, even if the sound absorbing member 6 is provided, the vibration mode of the drum head 3 is different from that of a normal drum without the sound absorbing member 6. It does not change. Therefore, the sustain of the harmonic overtone can be shortened without impairing the original tone color of the drum. Specifically, the sustain of the harmonic overtone can be shortened while maintaining the good rise of the attack sound.
In addition, since the snare drum 1 of the present embodiment employs a simple structure in which the sound absorbing member 6 is attached to the shell 2, the degree of shortening the harmonic sustain by the sound absorbing member 6 is adjusted without changing the shape of the shell 2. It becomes possible. For example, the degree of shortening the sustain of harmonics can be adjusted simply by changing the size and number of the sound absorbing members 6 attached to the shell 2.

  Further, according to the present embodiment, since the sound absorbing member 6 is attached to the edge 11 of the opening of the shell 2, the sound absorbing member 6 can be easily arranged near the outer peripheral region of the effective vibration film portion 22.

  Further, according to the present embodiment, the sound absorbing member 6 is attached to the folded portion 15 present in the normal metal shell 2. For this reason, it is not necessary to newly provide a structure for attaching the sound absorbing member 6 to the shell 2. That is, the sound absorbing member 6 can be easily attached to the shell 2.

In the first embodiment described above, the sound absorbing member 6 is, for example, as shown in FIG. 3, the second surface (second main surface) 15 b of the folded portion 15 located on the opposite side to the first surface 15 a that is the inclined inner surface 13. It may be attached to. In this case, the sound absorbing member 6 may be attached so as to protrude from the edge on the radially inner side of the shell 2 to the radially inner side of the shell 2 in the second surface 15b. Thereby, a part of the sound absorbing member 6 can be opposed to the outer peripheral region of the effective vibration film portion 22.
However, it is more preferable that the sound absorbing member 6 is attached to the first surface 15a as shown in FIG. 2 because the harmonic sustain can be shortened when the sound absorbing member 6 is arranged at a position closer to the outer peripheral region of the effective vibration film portion 22. .

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

The drum according to this embodiment is the same snare drum as the first embodiment illustrated in FIG. As shown in FIG. 4, the snare drum shell 2 according to this embodiment has a folded portion 15 similar to that of the first embodiment. In addition, the snare drum of this embodiment includes a sound absorbing member 6 similar to that of the first embodiment, and a damping member 7 that is attached to the shell 2 and suppresses vibration of the shell 2.
The vibration damping member 7 is made of a rubber material having a large internal loss, such as butyl rubber or vinyl acetate. Further, the vibration damping member 7 may be, for example, a restraint type vibration damping member in which the rubber material described above is laminated on a metal plate. When the damping member 7 is a restraint type, the metal plate may be a general steel plate made of a material such as aluminum or stainless steel.

In the present embodiment, the sound absorbing member 6 is attached to the first surface 15a of the folded portion 15 that forms the inclined inner surface 13, as in the first embodiment.
On the other hand, the vibration damping member 7 may be attached to any part of the shell 2, but in this embodiment, it is attached to the edge 11 of the opening of the shell 2. In the present embodiment, the damping member 7 is attached to the second surface 15b of the folded portion 15 located on the opposite side of the first surface 15a that is the inclined inner surface 13 by adhesion or the like. When the damping member 7 is a restraint type, the damping member 7 may be attached so that a rubber material is interposed between the metal plate and the shell 2 (folded portion 15).

The damping member 7 may be attached to the entire circumferential direction of the second surface 15b, for example, but may be attached to only a part of the circumferential direction, for example. Moreover, although only one damping member 7 may be attached to the second surface 15b, for example, a plurality of damping members 7 may be arranged at intervals in the circumferential direction of the second surface 15b, for example.
4 illustrates a structure in which the vibration damping member 7 is attached to the edge 11 of the first opening of the shell 2 to which the butter head 3A is attached. For example, the second opening of the shell 2 to which the snare side head 3B is attached is illustrated. The damping member 7 may be attached to the edge portion 11.

According to the snare drum of this embodiment, there exists an effect similar to 1st embodiment.
Further, according to the snare drum of this embodiment, since the vibration damping member 7 is attached to the shell 2, the sustain of the harmonic overtone radiated to the outside of the snare drum can be further shortened.

If this point is demonstrated in detail, the effective vibration film | membrane part 22 will vibrate by using the edge 11 of the opening of the shell 2 as a boundary condition (simple support boundary) because tension | tensile_strength is provided. For this reason, the edge portion 11 of the shell 2 reflects the vibration of the effective vibration film portion 22 to maintain the vibration, and the vibration of the effective vibration film portion 22 is transmitted to the shell 2, thereby causing the effective vibration film portion 22. It has the function to take away vibration energy from.
In the snare drum of this embodiment, the vibration of the effective vibration film portion 22 propagated to the shell 2 is suppressed by the damping member 7, so that the vibration energy taken away from the effective vibration film portion 22 can be increased. In particular, in this embodiment, since the damping member 7 is attached to the edge 11 of the opening of the shell 2, the vibration energy taken away from the effective vibration film portion 22 can be further increased. Thereby, the vibration attenuation of the effective vibration film part 22 can be accelerated. Therefore, it is possible to further shorten the harmonic sustain emitted to the outside of the snare drum.

  The sound absorbing member 6 can shorten the sustain of relatively higher harmonics, and the damping member 7 can shorten the sustain of relatively lower harmonics. Since the snare drum of this embodiment includes both the sound absorbing member 6 and the vibration damping member 7, it is possible to shorten the sustain of a wide range of harmonics from low to high.

  Moreover, in the snare drum of this embodiment, since the simple structure which attaches the damping member 7 to the shell 2 is employ | adopted, without changing the shape of the shell 2, the degree to which the sustain sustain is shortened can be adjusted easily. It becomes possible. For example, by changing the size of the sound absorbing member 6 attached to the shell 2, it is possible to easily adjust the degree of shortening the overtone sustain.

  Moreover, according to the snare drum of this embodiment, since the damping member 7 is attached to the second surface 15b of the folded portion 15, the damping member 7 is attached to the first surface 15a ( Compared with the case of attaching to the inclined inner surface 13), a space for attaching the sound absorbing member 6 can be secured widely. Therefore, even if the damping member 7 is provided, it is possible to sufficiently obtain the effect of vibration attenuation in the outer peripheral region of the effective vibration film portion 22 by the sound absorbing member 6.

  In the second embodiment described above, for example, the sound absorbing member 6 may be attached to the second surface 15b of the folded portion 15, and the vibration damping member 7 may be attached to the first surface 15a (the inclined inner surface 13) of the folded portion 15. . In this case, the sound absorbing member 6 may be attached so as to protrude from the edge on the radially inner side of the shell 2 to the radially inner side of the shell 2 on the second surface 15b as shown in FIG.

  Further, the vibration damping member 7 and the sound absorbing member 6 may be sequentially stacked and attached to the shell 2 as shown in FIG. In this case, the sound absorbing member 6 and the vibration damping member 7 are preferably fixed integrally. Further, when the damping member 7 is a restraint type, a metal plate of the damping member 7 may be interposed between the rubber material and the sound absorbing member 6. The laminated sound absorbing member 6 and vibration damping member 7 may be attached to the first surface 15a (inclined inner surface 13) of the folded portion 15 as shown in FIG. 5, for example, but may be attached to the second surface 15b, for example. Good. When the sound absorbing member 6 is attached to the second surface 15b, the sound absorbing member 6 may be arranged as illustrated in FIG.

In this configuration, since the sound absorbing member 6 and the damping member 7 are attached to the same portion of the shell 2 (inclined inner surface 13 in FIG. 5), the mounting area of the sound absorbing member 6 and the damping member 7 in the shell 2 can be kept compact. Can do.
Further, if the sound absorbing member 6 and the vibration damping member 7 are fixed integrally, the sound absorbing member 6 and the vibration damping member 7 can be attached to the shell 2 at the same time. That is, the sound absorbing member 6 and the vibration damping member 7 can be easily attached to the shell 2.

  Although the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

The sound absorbing member 6 and the vibration damping member 7 are not limited to being fixed to the shell 2, and may be detachably attached to the shell 2, for example.
For example, as shown in FIG. 6, the clip member 8 that sandwiches the turn-back portion 15 may be used as a means (detachment means) that makes the sound absorbing member 6 and the vibration damping member 7 detachable from the shell 2. The clip member 8 is formed in a U-shaped cross section having a pair of sandwiching pieces 8A and 8B, and urges the pair of sandwiching pieces 8A and 8B in a direction to bring them closer to each other.

  For example, as shown in FIG. 6, the sound absorbing member 6 and the vibration damping member 7 are fixed to the clip member 8. However, for example, only the sound absorbing member 6 may be fixed. Further, the damping member 7 and the sound absorbing member 6 are fixed to the outer surfaces of the different holding pieces 8A and 8B as shown in FIG. 6, for example, but for example to the outer surface of the same holding piece 8A. They may be stacked and fixed sequentially. Further, for example, the vibration damping member 7 may be configured as the clip member 8, and only the sound absorbing member 6 may be fixed to the outer surface of the holding piece 8 </ b> A of the clip member 8. In this case, the vibration damping member 7 is preferably a restraint type, for example.

The means (detachment means) for making the sound absorbing member 6 and the damping member 7 detachable from the shell 2 is a hook member 9 that is hooked on the edge 11 of the opening of the shell 2 as shown in FIG. May be.
The hook member 9 is formed in a V-shaped cross section that follows the outer peripheral surface and the inclined inner surface 13 of the shell 2 that are continuous with each other via the tip of the edge 11 of the opening of the shell 2. In a state where the hook member 9 is attached to the edge portion 11 of the shell 2, the first extending portion 9A of the hook member 9 contacts the inclined inner surface 13 of the shell 2 without a gap and extends in a direction different from the first extending portion 9A. The second extending portion 9B of the hook member 9 contacts the outer peripheral surface of the shell 2 without a gap.

  The hook member 9 may be formed in a ring shape corresponding to the edge 11 of the opening, for example, or may be formed in an arc shape corresponding to a part in the circumferential direction of the edge 11 of the opening. The hook member 9 may be V-shaped in cross section with at least the hook member 9 attached to the edge 11 of the shell 2, and is not necessarily in cross-section V-shaped in the state where the hook member 9 is removed from the shell 2. Need not be held. That is, the hook member 9 may have flexibility, for example.

For example, only the sound absorbing member 6 is fixed to the hook member 9 as shown in FIG. 7, but the sound absorbing member 6 and the vibration damping member 7 may be fixed, for example. The sound absorbing member 6 may be fixed to the outer surface of the first extending portion 9A disposed on the inclined inner surface 13.
When the damping member 7 is fixed to the hook member 9, the damping member 7 may be fixed to the outer surface of the second extending portion 9B disposed on the outer peripheral surface of the shell 2, for example. Further, for example, the vibration damping member 7 and the sound absorbing member 6 may be sequentially stacked and fixed on the outer surface of the first extension portion 9A or the second extension portion 9B. Further, for example, the vibration damping member 7 may be configured as the hook member 9 and the sound absorbing member 6 may be fixed to the first extending portion 9A.

When the sound absorbing member 6 and the vibration damping member 7 are detachable from the shell 2, the length of the harmonic sustain can be easily and appropriately adjusted according to the genre and place of the music playing the snare drum. Is possible.
Further, if the attaching / detaching means is the clip member 8 or the hook member 9, it is not necessary to fix the constituent elements of the attaching / detaching means to the shell 2 in advance, so that the sound absorbing member 6 and the vibration damping member 7 are unnecessary. Therefore, it can be used as a normal snare drum having no component of the attaching / detaching means.

When the attaching / detaching means is the hook member 9, the hook member 9 can be attached to the edge 11 of the opening of the shell 2 from the axial direction of the shell 2 in the same manner as the drum head. For this reason, the sound absorbing member 6 and the vibration damping member 7 can be easily attached to the shell 2.
Further, when the damping member 7 is configured as an attaching / detaching means such as the clip member 8 or the hook member 9, the constituent elements of the attaching / detaching means can be minimized.

When a plurality of sound absorbing members 6 and vibration damping members 7 are arranged in the circumferential direction of the edge 11 of the opening of the shell 2, the plurality of sound absorbing members 6 and vibration damping members 7 are respectively connected to the axis of the effective vibration film portion 22. They may be arranged at positions that are rotationally symmetric or line symmetric with respect to (the axis of the shell 2).
Even if a plurality of sound absorbing members 6 and damping members 7 are arranged at rotationally symmetric or line symmetric positions and are arranged at unequal intervals, a certain degree of symmetry is maintained. It can be approximated to a normal drum without the sound absorbing member 6 or the vibration damping member 7.
However, in the configuration in which the plurality of sound absorbing members 6 and the damping members 7 are arranged at unequal intervals, the symmetry is partially lost as compared to the configuration in which the plurality of sound absorbing members 6 and the damping members 7 are arranged at equal intervals. In some cases, the vibration mode of the drum head 3 slightly changes from that of a normal drum. For this reason, it is more preferable that the plurality of sound absorbing members 6 and the vibration damping members 7 are arranged at equal intervals.

  The shell 2 may be made of wood, for example. In this case, the shell 2 does not have the folded portion 15 as in the above embodiment, but has the inclined inner surface 13. Similar to the damping member 7, the wooden shell 2 suppresses vibration of the shell 2, that is, has a function of taking vibration energy from the effective vibration film portion 22 by transmitting vibration of the effective vibration film portion 22 to the shell 2. May have. For this reason, when the shell 2 is wooden, the damping member 7 does not need to be attached to the shell 2, for example.

The drum of the present invention is not limited to the snare drum, and may be applied to other drums having drum heads attached to both openings of a cylindrical shell, such as a tom or bass drum.
Further, the drum of the present invention can be applied to any drum that generates sound by being hit by an arbitrary means such as a mallet or a hand, in addition to a drum stick, a foot pedal, and a snappy.
The drum of the present invention is not limited to being applied to a drum that is formed in a cylindrical shape and includes a body having two openings. For example, a drum that includes a body having only one opening, such as timpani. It can also be applied to.

DESCRIPTION OF SYMBOLS 1 ... Snare drum (drum), 2 ... Shell (torso part), 3 ... Drum head, 3A ... Butter head (drum head), 3B ... Snare side head (drum head), 6 ... Sound absorption member, 7 ... Damping member , 8 ... Clip member (detaching means), 9 ... Hook member (detaching means), 11 ... Edge, 13 ... Inclined inner surface, 14 ... Main body part, 15 ... Folded part, 15a ... First surface, 15b ... Second surface , 22 ... Effective vibration membrane part (membrane part)

Claims (5)

The torso,
A drum comprising: a sound absorbing member attached to a folded portion that is bent radially inward with respect to a main body portion of the body portion.   The drum of Claim 1 provided with the damping member attached to the said folding | returning part and suppressing the vibration of the said trunk | drum.   The drum according to claim 2, wherein the damping member and the sound absorbing member are sequentially stacked and attached to the folded portion. The sound absorbing member is attached to the first surface of the folded portion facing the axially outer side of the trunk portion,
The drum according to claim 2, wherein the damping member is attached to a second surface of the folded portion opposite to the first surface. The drum according to any one of claims 1 to 4, wherein the sound absorbing member is detachable with respect to the folded portion.

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