JPH0760316B2 - Suikin Cave - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Suikin Cave, which has been conventionally installed in a Japanese garden and makes a shocking sound of water at a constant time interval, for example, once every 0.5 seconds to several seconds.

[0002]

2. Description of the Related Art FIG. 4 shows the structure of a conventional lyre cave installed in a garden. The water harpoon with this structure is designed to emit water drops by dropping water drops from the water drop holes at the upper end. When a water drop hits the water surface accumulated at the bottom, an impulsive sound is produced. The impact sound reverberates in the cavities made of pottery and has a peculiar beautiful and emotional sound quality such as peen and scene.

In order for the Suikin Cave to effectively produce sound in this state, it is necessary to satisfy various difficult conditions. What is especially important is to store water at a certain depth at the bottom so that a shock wave can be created on the surface of the water when water drops fall. When the water drops fall to the bottom without water, the water cannot be vibrated and no sound is produced. Traditionally, the Suikin Cave, which has been constructed by a professional gardener, has a difficult time adjusting the water depth. The water depth is adjusted by the amount of drainage and the amount of water drops supplied. If the amount of drainage is too large, the water will not collect, and if the drainage is poor, the depth of the water will deepen and the volume of the cavity will change, and a beautiful sound cannot be produced. The timbre of Suikin Cave changes significantly depending on the depth of the bottom reservoir water.

[0004] In order to adjust the depth of water at the bottom to a constant level, there has been developed a water harp with a drain pipe connected to the bottom. This Suikin Cave is described in the following publications, for example. Landscaping magazine Vol. 22 No. 3 (Showa 34-1) Japan Society of Landscape Architecture 14th to 17th pages Japanese Garden No. 19 (Showa 35-12-20) 15th
Page 17 Garden No. 54 (Showa 5-10-1) Building Materials Research Company page 76-80 Pages Garden Separate Volume 50 (Showa 61-7-1) Building Material Research Company Pages 104-120 In these publications The Suikingao described has a feature that the water level at the bottom can be adjusted within a certain range because a drain pipe is connected to the bottom.

[0005]

However, the harp caves described in these publications produce extremely small noise and cannot be taken outdoors several meters away. Also, on a windy day, even if you approach the Suikin Cave, you cannot hear the sound generated.

The pleasant sound generated by the water squirrel cave can be made loud by electrically amplifying it. However, it is extremely difficult to record the sound produced by the Suikin Cave with high quality sound quality close to the original sound. The reason for this is that the sound produced by the Suikin Cave is so small that it is barely audible in the ear. If too small a sound is recorded with a microphone, the S / N ratio of the recording device, that is, the ratio between the signal level and the noise level becomes poor, and it is not possible to record in clear sound quality without noise. In addition, noise generated around the Suikin Cave, for example, the sound of wind is also recorded, and only the sound of the Suikin Cave cannot be recorded. This drawback can be mitigated by inserting a microphone inside the Suikin bottle to record the sound. However, since the sound inside the mizukin bottle is not heard by the outside, there is a drawback that it does not have the unique sound quality of the mizukin cave.

Further, when a recorded sound is amplified by an amplifier and reproduced by a speaker, a high-quality reproducing device with less distortion is required. A speaker or amplifier with large distortion cannot reproduce the beautiful sound of Suikin Cave. Therefore, an extremely expensive reproducing device is required, and it is not possible to enjoy a unique sound with a simple device.

Furthermore, the conventional Suikin caves require adjustments to drop water at regular intervals. The falling period of water is adjusted by the water level of the water bottle arranged above the Suikin cave and the state of the water absorption rope connecting the water bottle and the Suikin cave. If the water level of the water bottle is increased and the water absorption rope is thickened, the cycle of water falling becomes shorter. This adjustment is time-consuming, and as the water is drained from the water bottle, the falling cycle of water becomes longer. For this reason, it is necessary to replenish water when used for a certain period of time. Furthermore, the conventional Suikin Cave has the disadvantage that it is inconvenient to install indoors. This is because it is necessary to drain the water coming out of the Suikin Cave. As described above, the conventional Suikin Cave has a drawback that it takes a lot of time to install and handle and cannot be easily installed anywhere.

The present invention was developed with the object of resolving this drawback. An important object of the present invention is to use a simple reproducing device to produce a unique sound with a beautiful sound quality close to the original sound. It is to provide Suikin Cave that can generate.

Another important object of the present invention is to provide a water harp that can generate sound with a sound quality very close to that of a water harp without using water, and can be easily installed and used anywhere. To provide.

[0011]

In order to achieve the above-mentioned object, the mizukochi of the present invention has the following constitution.
The Suikin cave is a cup-shaped cover that covers a sound hole 5 , a mizukin bottle 1, a speaker 2 that emits sound into the mizukin bottle 1, an impact sound generation unit 3 that transmits an impact sound to the speaker 2 at a constant cycle.
The diffusion member 6 is provided and is provided with a sound diffusion hole . Suikin bottle 1 produces the sound from the internal speaker 2.
Similar to the conventional Suikin bottle 1, in order to resonate in a cavity and produce a long reverberation sound, it is formed into a hollow shape with a pottery, a porcelain or the like. Further, the sound hole 5 is opened in order to radiate the reverberation sound inside. The impact sound generation means 3 transmits the impact sound to the speaker 2 at regular intervals, and includes a tape recorder for reproducing a tape recording the impact sound, a CD reproducing device, and the impact sound stored in a memory. It is possible to use a reproducing device or an amplifier or the like which puts a microphone inside the separately installed water harpoon bottle 1 and amplifies the sound of the microphone. The diffusing member 6 surrounds the impact sound emitted from the sound hole 5.
Can spread to.

[0012]

[ Function ] The Suikoto of the present invention is radiated from the speaker.
The impact sound resonates with the water jar and radiates from the sound hole. further,
The Suikin Cave of the present invention directly transmits the impact sound emitted from the sound hole.
Do not let it radiate to the surroundings. The impact sound from the sound hole is
The material is resonated and emitted to the outside. Radiation from speakers
The impact sound generated is the impact sound generated by dripping water on the water surface.
You cannot do exactly the same as. Storing water inside the mizuto bottle
The Suikin Cave where water drops are dropped is located inside or around the sound hole.
Even if you put a microphone in the wall and record the sound from the Suikoto cave,
It cannot be recorded as a shock sound without distortion. Toku
In addition, the impact sound radiated from the Suikoto Cave is extremely high frequency component.
It is a minute sound, and it is very difficult to record without distortion.
Furthermore, the recorded impact sound is decomposed into Fourier series,
Synthesize sounds of different frequency components to artificially create impact sounds
You can also do this, but this impact sound is also the impact sound of the actual Suikin Cave.
Can't be exactly the same. Furthermore, I recorded
Speakers that convert impact sound into sound also have high frequency components
There is a lot of distortion, and it emits a sound that is slightly different from the Suikin Cave
It Therefore, the impact sound from the speaker
How the Suikin cave radiating to the ocean approaches natural sound
Is important. "Sound of nature" emitted from Suikoto cave
Is not the impact sound emitted from the speaker,
Drop the water on the surface of the water stored inside the
It is the sound that is radiated to the outside by cavity resonance.

The Suikin Cave of the present invention makes a speech inside the Suikin bottle.
The impact sound radiated from the car resonates in the cavity, and
Impact sound radiated from the sound hole of the kotobin is also hollow even with the diffusion member
Resonate . The present invention in which the sound hole of the mizuto bottle is closed by a diffusion member
The Suikokin Cave is an energy source of impact sound emitted by the diffusing member.
Part of Rugie is absorbed. In other words, the diffusion material
Attenuate the radiated sound. Suikin cave that drops water drops on the surface of the water
The impact sound is extremely low, so the emitted sound is small
It's very sick to become. However, the speaker
The impact sound emitted from the
Even if the sound of knocking becomes small, it does not become an obstacle. A speaker
The impact sound emitted from the
However, it is important to make the impact sound closer to a natural sound. Book
The Suikin Cave of the invention uses a speaker for both the Suikin bottle and the diffusing member.
Resonates the shock sound emitted from the cavity. From Suikin Cave
The radiated impact sound of nature is the sound that is resonated with a cavity in a mizukin bottle.
Therefore, the cavity resonance is caused by both the water bottle and the diffusion member.
This makes it possible to make the sound almost indistinguishable from the natural sound.
It

Further, the Suikin Cave of the present invention comprises a Suikin bottle and a diffusion unit.
From the speaker by resonating the cavity in both materials
Attenuating the radiated noise component, S / N ratio of impact sound
That is, the ratio of impact sound to noise can be increased. cavity
The reason why resonance can increase the S / N ratio is that the frequency component of noise is
The component is extremely wider than the frequency component of the impact sound,
Vibration is a bandpass whose attenuation varies significantly depending on the frequency of the sound.
This is because it acts as a filter. That is, wide
The noise of the frequency component can
The level as a body can be lowered considerably. Radiation from Suikoto Cave
Is the impact sound generated is a sound radiated by cavity resonance?
As a result, the amount of attenuation due to cavity resonance is reduced.

In addition, the Suikin Cave of the present invention uses a diffusing member to produce sound.
There is also a feature that can be dispersed around. Radiated from Suikoto Cave
Since the impact sound has a high frequency, it has a strong directivity. Directional
For strong sounds, the volume of the sound heard changes depending on the direction.
It The Suikin Cave, which has a sound hole directly above the mizukin bottle, impacts upwards.
Emits sound. The sound hole is covered with a diffusion member, and the sound is spread on the diffusion member.
The sound radiation direction can be freely adjusted by opening the diffusion holes.

Further, the Suikin Cave of the present invention is a pottery water
Efficiently mass-produce Kotobin to produce impact sounds that are close to the sounds of nature.
There is an ideal feature to serve. That is, by increasing the sound hole,
This is because it is possible to radiate a shock sound that is close to what is expected . Sound hole of mizuto bottle
Suikin Cave, which emits sound directly from the
I can't. If you make the sound hole larger,
I can't radiate a sound close to nature because I can't resonate in the cavity
Because it will be. Suikin bottles with small sound holes are efficient and large in volume.
I can't produce. When baking in the furnace, the circumference of the sound hole contracts
This is because the probability of breaking becomes extremely high. Large sound hole
Then, cracks during baking can be considerably reduced. big
The sound hole has a long entire circumference even if the circumference of the hole contracts when baking.
The ratio is small, and cracks can be reduced. Water of the present invention
In the koto, the sound hole is blocked by a diffusing member to radiate the impact sound emitted.
It can be adjusted to make the sound hole of the mizukoto bottle larger to make it sound natural.
Can emit a near impact sound. For this reason, mizukin bottle, which is a pottery
Can be efficiently mass-produced.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments shown below exemplify a device for embodying the technical idea of the present invention, and the device of the present invention has the material, shape, structure, and arrangement of the components in the following structures. Not specific. The device of the present invention can be variously modified within the scope of the claims.

Further, in this specification, for easy understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claims" and "means for solving the problems". It is added to the members shown in "Column". However, the members shown in the claims are not limited to the members of the embodiment.

The Suikin Cave shown in FIG. 1 comprises a Suikin bottle 1, a speaker 2 provided inside the Suikin bottle 1, and an impact sound generating means 3 for transmitting an impact sound to the speaker 2 at a constant cycle. There is.

In the same manner as in the conventional water harp bottle 1, the water harp bottle 1 is hollowed out of pottery, porcelain, etc. in order to resonate into a long reverberation sound like the conventional water harp bottle 1. Has been done. The water harpoon bottle 1 shown in FIG. 1 has a bell-shaped overall shape and is open at the bottom. A sound hole 5 is opened at the center of the upper end of the mizuto bottle 1 to radiate the internal reverberation sound to the outside. The sound hole 5 preferably has an inner diameter of 10 mm to 5
The diameter is designed to be 0 mmφ, preferably 15 mm to 30 mmφ. If the sound hole 5 is too small, the volume of sound emitted to the outside is small, and if it is too large, the amount of air leaked by one vibration is large and the reverberation becomes short. Furthermore, the sound quality of the sound hole 5 changes when the inner diameter and the total length are changed. The reason is that, by changing the inner diameter and the length, the frequency at which the cavity inside the water jar 1 and the sound hole 5 resonate changes. To increase the overall length of the sound hole 5, as shown in FIG.
A partition is formed around the periphery of the.

The sound radiated from the Suikin cave contains relatively high frequency components. Sounds with high frequencies have strong directivity. For this reason, the sound pressure level remarkably lowers when deviated from the radiating direction. In order to efficiently radiate a high frequency sound to the surroundings, the water harp shown in the figure has a sound diffusion member 6 above the sound hole 5. The diffusing member 6 has a cup shape capable of covering the upper side of the sound hole 5, and has a plurality of sound diffusing holes opened in the periphery. The diffusing member 6 can diffuse and emit the sound coming out of the sound hole 5 to the surroundings. Further, by causing a cavity resonance inside the diffusion member 6,
It is also possible to adjust the sound quality. The diffusing member 6 is made of ware, metal, or hard plastic in order to effectively reflect sound on the inner surface.

In the Suikokutsu, the inertance of the sound hole 5 and the acoustic volume of the internal chamber constitute a resonance circuit. Sound hole 5
The inertance M is expressed by the following equation, where S is the opening cross-sectional area and m is the mass of the air in the sound hole 5 that is vibrated together by the fluctuation of the internal air pressure. M = m / S ²

Acoustic capacity C of the inner chamber of the water jar 1.
Is expressed by the following equation, where W ₀ is the volume, c is the speed of sound, and ρ ₀ is the static density of air. C = W ₀ / C ² ρ ₀

An ideal suikin cave constitutes a resonance circuit in which inertance M and electrostatic capacity are connected in series, and resonates at a frequency shown by the following formula. f = 1 / 2π (MC) ^1/2

As indicated by this equation, the resonance frequency of the water lyre bottle 1 decreases in inverse proportion to the route of the product of inertance and acoustic capacity. In other words, as the water jar 1 and the sound hole 5 are made larger, they resonate at a lower frequency.

The resonance circuit realizes a near-ideal cavity resonance as the value of Q indicating the energy loss per cycle is larger. In a resonance circuit with an infinite Q, resonance is not attenuated and vibration continues forever. On the other hand, a resonant circuit with a Q of 0 is
Does not vibrate at all. For this reason, it is important to increase the value of Q for the water cistern that resonates in the internal chamber. As shown in FIG. 1, when the lower surface opening of the water lyre bottle 1 is closed with a reverberation table 4 made of ware, the Q of the resonance circuit can be increased. This is because the vibration of the reverberation table 4 made of ware is difficult to attenuate. Compared to the surface of water, the reverberation table 4 made of ceramics loses less energy per vibration. It's obvious because when you hit the pottery with an object, it produces a reverberant sound. Therefore, there is a feature that the reverberation time can be lengthened and the reverberation can be improved by placing the mizuto bottle 1 on the reverberation table 4.

The reverberation table 4 is made of pottery or porcelain ware, like the lyre bottle 1, and has a cylindrical shape with its upper end closed and its lower end open. The echo table 4 shown in FIG. 1 is provided with a fixing hole 7 into which the yoke of the speaker 2 is fitted and fixed. As described above, when the speaker 2 is fixed in the fixing hole 7 of the reverberation table 4, the speaker 2 can be easily fixed.

As shown in FIG. 1, the cone paper of the speaker 2 arranged inside the lyre bottle 1 can be easily manufactured. However, in this structure, for example, when the cone paper of the speaker 2 rises, a positive sound pressure is emitted above the speaker 2 and a negative sound pressure is emitted below. In other words, sound pressures opposite to each other are emitted above and below the speaker 2. Since the sound radiated from the speaker 2 contains a high frequency component having directivity, even if the sound is radiated in this state, a cavity resonance can occur inside the water harpoon bottle 1.

However, as shown in FIGS. 2 and 3, the speaker 2 is fixed inside the reverberation table 4, and the sound radiated from the speaker 2 is radiated to the inside of the water jar 1.
If the structure is such that the sound radiated to the rear surface of the reverberator is radiated to the reverberation table 4, it is possible to prevent the sounds of opposite phases from being simultaneously radiated to the lychee bottle 1. Therefore, the Suikin cave shown in these figures has a feature that the sound can resonate inside the Suikin bottle 1 efficiently.

The echo table 4 shown in FIG. 3 has a structure in which the bottom surface is closed so that no sound is emitted from the echo table 4. In this way, if the reverberation table 4 has a closed structure, the sound radiated from the speaker 2 to the outside can be placed wherever the water harp is installed, in other words, even if it is installed in a place where there is a gap on the bottom surface of the reverberation table 4. There is a feature that can reduce. However, the Suikin cave shown in FIGS. 1 and 2 can be installed on a horizontal plane to block the lower part of the echo table 4.

The impact sound of water is sent to the speaker 2 by the water jar 1.
Anything that can be radiated inside, such as a cone speaker, a horn speaker, a condenser speaker, or a speaker that directly vibrates the lychee bottle 1 can be used.

The impact sound generating means 3 transmits the impact sound to the speaker 2 at regular intervals, and for this purpose, a tape recorder for reproducing a tape recording the impact sound or a CD reproducing device can be used. Further, it is possible to use a reproducing device for storing the impact sound in the memory, or an amplifier for amplifying the sound of the microphone by putting a microphone inside the separately installed water jar 1.

For a tape or CD used in a tape recorder or a CD reproducing apparatus, a microphone is placed inside a water cistern where water is dropped to record the dropping sound of water. The device that stores the impact sound of water in the memory and electrically generates the impact sound of water records the sound inside the water harbor with a microphone, amplifies this sound and then converts it into a digital signal, Stored in memory. The digital signals stored in the memory are sent out in order and converted into analog signals by the D / A converter,
This is amplified and transmitted to the speaker 2.

Furthermore, a shock sound generating means can be used in which the dropping sound of water recorded inside the water harbor is divided into frequencies, sounds of each frequency component are produced by an oscillator, and this is amplified and transmitted to a speaker. .

Further, a shock sound generating means can be used in which a water harpoon for dropping water is installed nearby, a microphone is inserted in the water harbour, and the sound of the microphone is amplified and transmitted to a speaker.

The impact sound generating means may be a reproducing device for generating a sound to be stored in a memory, or an oscillator reproducing device, and this may be battery-operated and arranged inside a reverberation table or a water bottle. This kind of structure has a feature that it can be used very conveniently because it makes a sound when the switch is turned on.

[0037]

EFFECTS OF THE INVENTION The Suikin cave of the present invention comprises a Suikin bottle and a diffusion member.
Resonance of impact sound radiated from the speaker in both
Let Resonating with both the water jar and the diffusing member
The radiated impact sound is almost indistinguishable from natural sound
The original impact sound of Suikin Cave. The inside of the water jar is a speaker
-The shock sound emitted from the cavity causes cavity resonance. In addition, water
The impact sound radiated from the sound hole of the kotobin is
The cavity is resonated. A book that blocks the sound hole of a mizuto bottle with a diffusion member
The Suikin Cave of the invention prevents the impact sound emitted from the sound hole from being diffused.
Since the material resonates in the cavity and radiates to the outside, the diffusion member
The sound of hammering is further made into the original sound quality of Suikin Cave.

Further, the Suikin Cave of the present invention comprises a Suikin bottle and a diffusion unit.
Radiating from the speaker by causing cavity resonance in both materials
Attenuated noise components are attenuated. Therefore, from the diffusion member
The S / N ratio of impact sound radiated to the outside can be increased. cavity
Resonance is a specific frequency of noise that has a wide frequency component
S of the impact sound emitted from the diffusing member, with the component attenuated.
Improve the / N ratio.

Furthermore, the Suikin cave of the present invention comprises a diffusing member.
The feature is that the sound can be dispersed around. Radiated from Suikoto Cave
Since the impact sound generated has a high frequency, it has strong directivity, but the sound hole
Cover with a diffusion member and open a sound diffusion hole in the diffusion member to
The Suikin Cave of the present invention, which can freely adjust the radiation direction, expands the sound.
It has the feature that it can be scattered and emitted all around.

Furthermore, the Suikin Cave of the present invention is close to the sound of nature.
Despite being able to radiate the original impact sound of the Suikoto Cave to the surroundings
Instead, it also has the feature that it can be mass-produced efficiently . Large sound hole
This is because it can emit a shock sound that is close to nature. Mizuto bottle
Has a sound hole to make the radiating impact sound the original sound of the Suikin Cave.
If it is small, it will crack easily when baked in a furnace. However,
According to the mizukin cave of the present invention, the sound hole of the mizukin bottle is closed by a diffusion member.
Since it has a large sound hole, it can generate a favorable impact sound.
It For this reason, cracks when baking the mizukin bottle in the furnace can be minimized.
It

[Brief description of drawings]

FIG. 1 is a sectional view of a Suikin cave showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a Suikin cave showing another embodiment of the present invention.

FIG. 3 is a sectional view of a mizukotsu cave showing another embodiment of the present invention.

FIG. 4 is a cross-sectional view showing an example of a conventional Suikokin cave.

[Explanation of symbols]

1 ... Suikin bottle 5 ... Sound hole 2 ... Speaker 6 ... Diffusion member 3 ... Impact sound generating means 7 ... Fixing hole 4 ... Echo stand

Claims (1)

[Claims] 1. An upper surface of a fired product formed into a hollow shape
A water harp bottle (1) having a sound hole (5) on its side, a speaker (2) that emits sound into the water harp bottle (1), and an impact sound to the speaker (2) at regular time intervals. A cup-like shape that covers the sound impact generating means (3) to be transmitted and the sound hole (5).
Diffusing member formed with sound diffusion holes
(6) Suikokin Cave with