KR20160058661A - Variable Reverberator with Frequency Selection and Diffusor - Google Patents

Abstract

The present invention relates to a variable reverberator capable of reducing an installation area of a sound absorption device and thus reducing a loss rate of an indoor space. The variable reverberator (47) according to the present invention comprises: a plurality of planar panels (41) serving as a reflective surface; a rotary bar (42) allowing one end of the planar panels (41) to be fixed thereto and serving as a rotational shaft to rotate the planar panels (41); a plurality of recesses (43) formed in a vertical direction as much as a width and a length of each of the panels (41) and allowing one ends of the planar panels (41) to be fixed to the rotary bar (42); a structure (46) having a specific height and width and length such that the plurality of planar panels (41) attached to the rotary bar (42) rotate in one direction of the rotary bar (42), having a bottom and a ceiling surface to allow the rotary bar (42) to be fixed thereto, having a front side portion having an open hexahedral shape, receiving the planar panels (41) and the rotary bar (42), and transmitting a spread sound to the front side portion; and a plurality of sound absorption surfaces (44) integrated with the reflective surface on the opposite side of the reflective surface.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable reverberator having a frequency selection and spreading function,

This invention is directed to a venue reverberation tuning, particularly to a variable reverb device having frequency selection and spreading functions. It should be understood that the variable reverberation apparatus of the present invention includes a technique for a frequency response controller and a variable diffuser using a Helmholtz resonator capable of adjusting a sound absorption frequency band.

Conventionally, a technique of attaching an impure material made of a porous material to a building wall has been used to adjust the concert hall reverberation inside the building. An advantage of this method is that the soundproofing can be easily performed, and the structure of the sound absorbing material is relatively simple. However, the disadvantage of this method is that sound absorption at a specific frequency is impossible. In order to absorb the reverberation of a specific frequency, there has been a problem in that a new sound absorbing material corresponding to a specific frequency must be attached again.

Therefore, in order to solve these problems, a semi-active sound absorbing device capable of changing the sound absorption frequency has been used. Korean Patent No. 10-0936786 (Registered on January 01, 2010, "Semi-active Sound Absorption System and Sound Absorption Method Using Same"). In this patent, a porous sound-absorbing plate is disposed so that an air layer is positioned between the porous sound-absorbing plate and the wall, and a distance between the porous sound-absorbing plate and the wall is adjusted. However, the problem of this patent can not be applied when the amount of change of the sound absorption frequency is large, and when the amount of change of the sound absorption frequency is large, the movement distance of the wall is made longer to further increase the thickness displacement of the air layer between the wall and the sound- However, in this case, there is a problem that the indoor space is reduced so much.

On the other hand, in the indoor space (for example, the hall) of the building, hall characteristic reflections are generated. Among people listening to a sound source in a sound source, there is a direct sound to which a sound is directly transmitted to a person who listens to the sound source, and there is an early reflection sound transmitted to the person who is reflected by the ceiling or floor. There is a reverberation after the initial reflections. This reverberation is determined by the sound absorption characteristics of the holes, and the proper reverberation of the holes depends on the sound source (voice, music, etc.). Generally speaking, the speecch is dry and adjusts to the center of the voice intelligibility, and the music adjusts vividly to the center of the musical intelligence with proper sounding.

After the source is stopped, the time at which the normal energy of the sound is separated by a millionth of a second / the sound pressure level dropped by 60dB is called the reverberation. This reverberation time depends on the purpose of various spaces. For example, concert halls, Catholic churches, opera houses, conference rooms, and television studios have different reverberations, and concert halls have different reverberations.

The direct sound expresses the sound quality and affects the auditory sense by the volume sense. And the reflection sound is delayed about 20 ~ 50ms, and the direction of incidence and level are in a function relation, and it reinforces direct sound, emphasizes intelligibility, and gives a sense of hearing that gives a diffusion feeling. The reverberation sound is omnidirectional, and it comes from all directions and has a reflection sound after about 50 ms. It has an auditory effect that reduces the clarity but gives a reverberation feeling.

Typical types of sound absorbing materials include porous sound absorbing materials, resonant sound absorbing materials and plate vibration absorbing materials. The porous type sound absorbing material is excellent in the sound absorption ability of the middle and high frequency, the resonance type sound absorbing material is excellent in the narrow band sound absorption ability, and the plate vibration type sound absorption material is excellent in the sound absorption ability in the low frequency band. However, each of these is not only good, but also one of the weaknesses.

Therefore, a need has arisen for a variable reverb device capable of selecting and spreading a frequency, which can solve the problems of these conventional techniques. Under this background, this invention was invented.

The patent literature related to this invention is Korean Patent No. 10-0936786 (Registered on January 01, 2010, entitled "Semi-active Sound Absorption System and Sound Absorption Method Using Same"

SUMMARY OF THE INVENTION It is an object of the present invention to provide a variable reverberation apparatus having a frequency selection and spreading function. Particularly, the present invention aims to provide a variable reverberation apparatus and a variable diffusion apparatus. These techniques are a group of inventions that are closely related to each other, centering on variable reverb devices.

Other objects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

In a preferred embodiment of the variable diffusion device according to the present invention,

This allows the attenuation pattern of the reflections to be directly exponentially attenuated in a given diffusion space,

The surface of the diffusion material is formed into a polygonal shape in order to prevent the flutter echo and keep the IACC value at 0.5 or less without lowering the intelligibility of the sound over time,

The upper polygonal diffuser has a triangular or elliptical structure, and the relationship between the transverse length (a) and height (b) of the diffuser is

Lt; / RTI >

는 흡음하고자 하는 소리의 파장인 것을 특징으로 한다.At this time

Is a wavelength of a sound to be sound-absorbed.

In this embodiment,

A plurality of planar panels;

A rotating bar serving as a rotating shaft so that one end of the upper panel is fixed and rotatable;

A plurality of grooves formed in the upper rotation bar in the longitudinal direction by a width and a length of the upper panel so that one end of the upper panel is fixed;

A plurality of the above panels are attached to the rotation bar and have a height, a width, and a vertical size capable of rotating in one direction of the rotation bar, and have a bottom and a ceiling face so that the rotation bar is fixed. A structure for housing panels and rotating rods and emitting diffused sound to the front side;

And the like.

In this embodiment, the thickness and size of the upper panel are preferably adjusted selectively.

In this embodiment, it is preferable that the depth of the upper groove portion is selectively adjusted.

In this embodiment, the number of upper panels is preferably 2 to 4.

In this embodiment, the cross section of the upper rotation bar is polygonal, and is particularly preferably circular.

In this embodiment, it is preferable that the material of the upper panel, the structure and the rotating bar is wood or a resin material.

In a preferred embodiment of the reverberation device according to the present invention, the above-described variable diffusion device is applied,

The above-mentioned panels are composed of a material that performs the function of a reflecting surface,

A plurality of sound absorbing surfaces attached to the opposite side of the upper reflecting surface so as to be integral with the reflecting surface;

As shown in Fig.

In this embodiment, it is preferable to adjust the sound absorption rate to be high in order to dry the reverberation of the upper diffusion space when the sound is negative.

In this embodiment, it is desirable to adjust the reverberation of the upper diffusion space to a lower sound absorption rate so as to have an appropriate sound when the sound is music.

In this embodiment, the thickness of the plurality of sound absorbing surfaces is preferably different from each other.

The variable deflecting device of the present invention can reduce the installation area of the sound-absorbing device by selectively changing the thickness of the air layer behind the sound-absorbing plate, the perforation shape of the sound-absorbing plate, the line-perforation-type opening ratio and the respective entrance lengths. There is an effect that the loss rate of the indoor space can be reduced.

1 is a perspective view of a preferred embodiment of a variable diffusion device according to the present invention.
Fig. 2 is a perspective view of the rotation bar of Fig. 1;
3 is a perspective view of another preferred embodiment of the variable diffusion device according to the present invention.
4 is a perspective view of still another preferred embodiment of the variable diffusion device according to the present invention.
FIG. 5 is a perspective view of another embodiment of a rotation bar and a rotary plate applied to the variable diffusion device according to the present invention. FIG.
Fig. 6 is a perspective view of a preferred embodiment of the reverberation device according to the present invention, in which a reflection surface and a sound-absorbing surface are attached to Fig. 1;
7 is a characteristic curve of a sound absorbing surface and a reflection surface according to the apparatus of FIG.
8 is a reverberation characteristic curve when the reverberation is adjusted according to the apparatus of Fig.
Fig. 9 is an adjustment state diagram of musical data adjusted with dry sound adjusted voice data and sound corresponding to sound.

The present invention is directed to the arts reverberation tuning technology. In particular, the present invention relates to a frequency response controller and a variable dispersion device using a Helmholtz resonator, which is a kind of active sound absorption device capable of adjusting a sound absorption frequency band. These two devices are closely related to each other and should be understood as a group of inventions constituting the frequency response controller according to the present invention. Each of these will now be described in detail below with reference to various embodiments.

I. Variable Diffuser

Hereinafter, the configuration and operation principle of the variable dispersion device of the frequency response controller according to the present invention will be described in detail with reference to FIG. 1 to FIG.

<Configuration>

A variable diffusion device according to the present invention will now be described with reference to FIGS. 1 and 5. FIG. A preferred embodiment of the variable spreading device 40 according to the present invention allows the attenuation pattern of the reflected sound to be directly exponentially attenuated in a given diffusion space,

The surface of the diffusion material is formed into a polygonal shape in order to prevent flutter echo and to maintain the IACC (Interaural Cross-Correlation) value below 0.5 without lowering the clarity of the sound over time. The IACC represents the similarity of the sound to the left and right ears of the listener and is used to confirm the correspondence of the reflections on both sides of the theater.

Here, the upper polygonal diffuser has a triangular or elliptical structure, and the relationship between the horizontal length (a) and the height (b) of the diffuser is expressed by Equation (1).

는 흡음하고자 하는 소리의 파장인 것을 특징으로 한다.
At this time

Is a wavelength of a sound to be sound-absorbed.

In the variable diffusion device (40) of the present invention,

A plurality of planar panels 41 rotating;

A rotation bar 42 serving as a rotation axis so that one end of the upper panel 41 is fixed and rotatable;

A plurality of grooves 43 formed in the upper rotation bar 42 in the longitudinal direction by a width and a length of the upper panel 41 so that one end of the upper panel 41 is fixed;

A sound absorbing surface 44 formed on one surface of the upper panel 41;

A reflecting surface 45 formed on the opposite panel surface of the upper sound-absorbing surface 44;

A plurality of the panels 41 are attached to the rotation bar 42 so as to be rotatable in one direction of the rotation bar 42, The upper surface of the upper panel 41 and the upper surface of the rotary shaft 42 are received by the upper surface of the upper panel 41,

In the present invention, the thickness and the size of the upper panel 41 can be arbitrarily changed as needed. In the performance test of the present invention, a panel having a thickness of 12 mm, a height of 300 mm and a width of 140 mm was used.

In the present invention, the depth of the upper groove 43 in which the upper panel 41 is fitted in the upper rotation bar 42 can be optionally changed. In the performance test of the present invention, the rotation bar 42 having a depth of 20 mm Respectively.

In the present invention, the number of upper panels 41 is preferably 2 to 4.

In the present invention, the cross section of the upper rotation bar 42 is polygonal, and is particularly preferably circular.

Particularly, in the present invention, it is preferable to appropriately adjust the resonator entrance area in order to make the reverberation of the upper diffusion space sound dry when the sound is negative. Also, it is desirable to properly adjust the resonator entrance area so that the resonance of the upper diffusion space is vivid when the sound is music.

In the present invention, it is preferable that the material of the upper panel 41, the structure 46, and the rotary bar 42 is wood or a resin material.

Fig. 6 shows a structure in which the sound absorbing surface 44 is attached to the front surface of the panel 41 of the variable diffusion device 40 shown in Figs. 1 and 2, and performs the function of the reverberation device 47. Fig. The reverberation device 47 may be constructed by attaching the sound-absorbing surface 44 to the variable diffusion device 40 of Figs. 3 to 5 as well.

The sound absorbing surface 44 used in Fig. 6 may be made of a polyester sound absorbing material having a thickness of 30 mm, for example. 6 shows a case in which the panel 41 itself is used as the reflecting surface 45. FIG.

Fig. 7 is a graph comparing the characteristics of the inlet mooring surface 44 and the reflection surface 45. Fig. The data on this graph are FFT data (fast Fourier transformation data), the horizontal axis is the audio frequency band of the FFT data, and the vertical axis is the signal size. The characteristics of the sound-absorbing surface 44 and the reflection surface 45 are generally similar, but eventually the signal value of the reflection surface 45 (indicated by a small circle on the graph) is slightly larger, It has been observed that the value of the sound absorbing surface 44 slightly increases and becomes smaller than the reflection surface 45 gradually. This graph shows that the sound absorption characteristics change according to the cross-sectional area of the resonator inlet.

Figs. 8 and 9 show an example where the reverberation in the hall for voice and music data is adjusted by the reverberation apparatus of the present invention. FIG. 8 shows an example in which reverberation is adjusted to sound based on speech intelligibility with respect to speech data, and FIG. 9 shows an example in which reverberation is adjusted with sound of music intelligibility with resonance with music data. As shown in this example, according to the reverberation device of the present invention, it is possible to adjust the reverberation according to the listener's preference for sound and to use the hall as a multipurpose according to the event. It can be seen from FIG. 9 that the reverberation is almost exponentially decreasing, and FIG. 8 is also decreasing exponentially. It is well known that the ideal reflection pattern attenuates exponentially in the ideal diffusion space, and this invention is deemed to correspond to this.

8 and 9, it has been confirmed that there is no echo effect in the present invention, and flutter echo phenomenon does not occur, proving that the present invention has a very excellent function. Also, in the case of the present invention, it has been confirmed that the IACC value is maintained at 0.5 or less to secure a desirable sound field.

By the practice of the present invention, both side walls can be prevented from being parallel and rigid wall echoes, and the multiple reflection of clapping, footsteps, and the like can be prevented, and a brisk trembling sound can be prevented.

Further, the present invention can selectively change the inner volume of the sound-absorbing device as well as the area of the inlet and the length of the inlet so that the desired sound-absorbing frequency can be precisely adjusted and the sound-absorbing frequency band can be widened in the same space do.

In addition, the installation area of the sound absorbing device can be reduced due to the implementation of the present invention, and as a result, the loss of the indoor space can be reduced.

As such, the present invention can be variously modified and can take various forms, and the detailed description of the present invention has only described specific embodiments thereof. It is to be understood, however, that this invention is not limited to the particular forms set forth in the foregoing description, but rather includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

The present invention relates to a reverberation device for a performance hall and is industrially applicable.

40: Variable diffusion device 41: Panel
42: rotation rod 43:
44: sound-absorbing surface 45: reflecting surface
46: Structure 47: reverberation device

Claims (11)

This allows the attenuation pattern of the reflections to be directly exponentially attenuated in a given diffusion space,
The surface of the diffusion material is formed into a polygonal shape in order to prevent the flutter echo and keep the IACC value at 0.5 or less without lowering the intelligibility of the sound over time,
The upper polygonal diffuser has a triangular or elliptical structure, and the relationship between the transverse length (a) and height (b) of the diffuser is

Lt; / RTI &gt;
At this time

Is a wavelength of a sound to be sound-absorbed. The method of claim 1,
A plurality of planar panels;
A rotating bar serving as a rotating shaft so that one end of the upper panel is fixed and rotatable;
A plurality of grooves formed in the upper rotation bar in the longitudinal direction by a width and a length of the upper panel so that one end of the upper panel is fixed;
A plurality of the above panels are attached to the rotation bar and have a height, a width, and a vertical size capable of rotating in one direction of the rotation bar, and have a bottom and a ceiling face so that the rotation bar is fixed. A structure for housing panels and rotating rods and emitting diffused sound to the front side;
And a variable diffusing device. 3. The variable spreading device of claim 2, wherein the thickness and size of the upper panel are selectively adjusted. 3. The variable dispersion device according to claim 2, wherein the depth of the groove portion is selectively adjusted. The variable spreading device according to claim 2, wherein the number of upper panels is 2 to 4. The variable spreading device according to claim 2, wherein the cross section of the upper rotation bar is polygonal, in particular circular. The variable diffusing device according to claim 2, wherein the material of the upper panel, the structure and the rotating bar is wood or a resin material. In a variable reverb apparatus to which one of the first to seventh variable diffusers is applied,
The above-mentioned panels are composed of a material that performs the function of a reflecting surface,
A plurality of sound absorbing surfaces attached to the opposite side of the upper reflecting surface so as to be integral with the reflecting surface;
Wherein the variable reverberation apparatus further comprises: The variable reverberation apparatus according to claim 8, wherein the sound absorption rate is adjusted to be high in order to dry the reverberation of the upper diffusion space when the sound is negative. The variable reverberation apparatus according to claim 8, wherein the reverberation of the upper diffusion space is adjusted so as to lower the sound absorption rate so as to have an appropriate sound when the sound is music. 9. The variable reverberation apparatus according to claim 8, wherein thicknesses of the plurality of sound absorbing surfaces are different from each other.

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