KR102223578B1 - High functional interference type noise reduction device - Google Patents

Abstract

The present invention relates to a high-functional interference type noise reduction device for blocking and reducing noise transmitted from the outside by being installed on a noisy roadside, bridge, or a place where houses are dense. More particularly, the present invention relates to a high-functional interference type noise reduction device for efficiently reducing noise by increasing the number of times of noise friction while increasing the length of the path of diffraction noise flowing into the interference type noise reduction device installed on top of a soundproof wall.

Description

High functional interference type noise reduction device

The present invention relates to a high-functional interference-type noise reduction device for blocking and reducing noise transmitted from the outside by being installed on a noisy roadside, a bridge or a place where houses are dense, and in detail, an interference-type installed on the top of a soundproof wall. The present invention relates to a high-functional interference type noise reduction device that increases the length of the diffraction noise path flowing into the noise reduction device and at the same time increases the number of noise frictions to efficiently reduce noise.

Noise refers to the vibration of the frequency band that causes inconvenience to life at the audible frequency that humans can hear the vibration of the air, and such noise is widely distributed around our lives, such as roads, bridges, railroads, and general industrial sites. .

Noise has a lot of influence on human life, and in severe cases, it is classified as pollution that interferes with human life. Therefore, in roads, bridges, railroads, and industrial sites with heavy noise, soundproofing facilities should be provided for people living in the vicinity.

In general, neighboring residents suffer a lot of inconvenience due to noise generated by the passage of numerous vehicles around roads or highways.In order to solve this noise pollution, it is caused by the passage of vehicles on roads, especially structures on both sides of the highway. A sound insulation wall is installed that absorbs or reflects the noise propagating in a radial direction to exert a sound insulation effect.

Since noise generated around the road is propagated in a radial straight line from the noise source using air as a medium, most of it is absorbed or reflected by the soundproof wall, but due to the nature of the sound wave, some of the noise is diffracted after it collides and passes over the soundproof wall. The diffracted noise that has passed over immediately causes noise pollution as it propagates to the residential area.

In recent years, with the development of the noise and vibration field, research to reduce the diffraction noise passing through the soundproof wall is being actively conducted, but until now, a device with more excellent noise reduction effect than the method of increasing the height of the soundproof wall has not been developed. Actually.

The expansion of the height of the soundproof wall is subject to many restrictions due to infringement of the view right, and there is a problem that it is not easy to install a soundproof wall in addition to the existing soundproof wall, as well as a lot of additional facilities. Furthermore, many problems arise, such as causing psychological anxiety to residents or passengers using vehicles in a nearby area or infringing on the view right. In addition, when the soundproofing wall is installed in a structure affected by a load such as a bridge, it should be installed as low as possible to reduce its own load in order to secure the structural stability of the bridge and to secure the stability of the strut and the underlying structure. In this case, residents living in high-rise apartments in nearby areas are constantly filing complaints due to vehicle noise.

In order to solve this problem, interference-type noise reduction device installed on the top of the soundproof wall as previously registered utility model No. 20-0301356 (cited invention 1) or a sound-absorbing type having the same structure as registered utility model No. 20-0378864 (cited invention 2). By installing a noise reduction device, the installation cost required to increase the height of the soundproof wall is reduced, and noise generated from vehicles is effectively blocked to create a comfortable living environment in buildings around roads and railroads.

In the cited invention 1, a plurality of bent pieces are connected and bonded so that a plurality of fan-shaped noise guide grooves are formed on the outer surface in the thickness direction of the soundproof wall, and then the coupling piece is downward so as to wrap the upper front and rear surfaces of the soundproof wall at the bottom. It is welded so as to protrude, and by providing an interferometer that closes both open ends of the noise guide groove formed by an arrangement of bent pieces in succession, the sound wave phase of the diffraction noise flowing into the noise guide groove is reversed to the interfering device. When applied to the top of the soundproof wall on the road, when some of the noise generated from the vehicle flows into the noise guide groove, the noise reaches the end of the inner passageway of the noise guide groove and is reflected. After modulating the original wavelength, the noise is again emitted toward the entrance through the noise guide groove, and the emitted noise at this time disturbs the noise directed to the sound receiving area without passing through an interfering device, thereby greatly reducing noise energy.

However, in the cited invention 1, the effect is improved due to the external noise flowing into the noise guide groove and the extinction interference in a specific frequency region, but it is generated by the superposition of the incoming diffraction noise wave and the re-inflow diffraction noise wave. A problem is pointed out that it is impossible to reduce the noise reaching the low frequency band and the high frequency band because a frequency range that deteriorates due to noise caused by constructive interference is also generated.

In addition, the cited invention 1 provides a monolithic modular interfering device by forming a plurality of noise guide grooves in divisions by a plurality of bent pieces, and integrally forming and providing reflective sealing plates at the ends of these noise guide grooves. , The reinforcing bar is connected through the reinforcing pipes formed in each of the interferors to install a multi-interferer on the top of the soundproof wall. Due to the nature of the mold production, it is not only difficult to make the mold, but also the problem that the production cost is excessive is pointed out, and furthermore, when the interference according to the cited invention 1 is installed on the upper plate of the bridge to reduce the noise caused by the wind pressure blowing from the river or the sea. When the bridge's structure contracts and expands due to the temperature difference that changes according to the season, if the bridge moves, the interfering device may be damaged or separated, resulting in falling bridges or leakage, so safety issues and noise complaints are pointed out.

In addition, the cited invention 2 is a frame in which the front plate and the rear plate are spaced apart by an inner partition wall; A coupling part integrally formed at the lower end of the frame and fixed to the upper end of the soundproof panel; A sound-absorbing chamber formed on both sides of the frame by the internal partition walls, each having a perforated plate installed at the front side, and a sound absorbing material installed therein, respectively, to absorb diffraction noise passing through the soundproof panel; And formed in the center of the frame by the inner partition wall, and is partitioned into a plurality of closed pipes by a plurality of inner plates, so that the sound wave phase of the diffraction noise introduced into the interior is reversely converted to be destructively interfered with the external diffraction noise. It provides an interference and sound absorption type noise reduction device comprising a;

Diffraction noise is reduced through the interference and destructive interference by a plurality of closed pipes partitioned in the sound-absorbing noise reduction device, but this applies the same all the problems pointed out in the cited invention 1, and the sound-absorbing material installed inside both sides of the noise reduction device A perforated plate is installed on the surface to absorb the diffraction noise, but by absorbing the diffraction noise introduced from the outside into a single perforated plate, the tuning sound suitable for noise reduction cannot be generated. Not only is the problem that cannot be reduced to the extent that the sound absorbing material needs to be installed separately, the production cost is increased due to the cost of installing the sound absorbing material, and the assembly configuration is complicated, so that the productivity is lowered.

Therefore, by simplifying the shape of the structure of the noise reduction diffraction device geometrically to make it easy to manufacture, mass production is possible to reduce the manufacturing cost, and in response to the bridge behavior due to temperature difference, the noise reduction diffraction device There is a demand for a diffraction device for noise reduction that prevents damage or separation.

The present invention is a new type of high-functionality capable of effectively reducing noise having a frequency band in all areas by lengthening the diffraction noise path or creating a tuning sound suitable for noise reduction by colliding the incoming diffraction noise in the inflow path. The technical task is to provide an interference-type noise reduction device.

In addition, the present invention makes it a technical problem to prevent damage or separation of the noise reduction device in response to the behavior of the bridge due to the temperature difference.

The present invention assembles a noise attenuation panel for inducing noise diffraction with a noise diffraction path and a noise attenuating panel for inducing noise diffraction, and fixing the lower brackets of each of the noise attenuation panels for inducing noise diffraction to the support member installed on the top of the sound insulation wall In the noise reduction device to be installed in the longitudinal direction between the post and the post at the top of the sound insulation wall, the noise attenuation panel for inducing the noise diffraction comprising: a main board; A noise induction guide path dividing plate integrally formed on one side of the main board and protruding at regular intervals in the vertical direction; Including a plurality of curved noise friction pieces protruding to both sides of the noise induction guide path dividing plate disposed in the noise diffraction path portion formed by the noise induction guide path dividing plate; It is characterized in that it is configured to reduce noise by increasing the number of times.

The present invention provides a high-functional interference-type noise reduction device capable of effectively reducing noise propagating over the sound-proof wall without increasing the height of the sound-proof wall.

In the present invention, as well as rapid inflow of diffraction noise, the number of diffraction noise friction is greatly increased by the noise friction piece, thereby enhancing the acoustic interference effect, as well as increasing the length of the diffraction noise inflow path, thereby securing a dual effect. Therefore, it is possible to provide a new type of high-functional interference-type noise reduction device capable of effectively reducing noise having a frequency band in all areas by destructive interference generated through multiple diffraction and noise friction.

The present invention can be provided by geometrically simplifying the structure shape of a noise attenuating panel for noise diffraction induction, and it is easy to manufacture a mold due to the characteristics of a mold injection technology, thereby improving productivity, thereby reducing manufacturing cost.

The present invention prevents damage to the noise reduction device by allowing the bridge structure to shrink and expand due to the temperature difference in accordance with the seasonal temperature change and prevent the noise reduction device from falling off or leaking through the contraction expansion countermeasure in response to the bridge's behavior, It is possible to provide a high-functional interference-type noise reduction device with secured safety.

1 is a combined perspective view of a state in which a high-functional interference-type noise reduction device according to the present invention is installed on an upper portion of a soundproof wall.
2 is an exploded perspective view of a high-functional interference-type noise reduction device according to the present invention.
3 is a cross-sectional view taken along line A-A in FIG. 1.
4 is a cross-sectional view taken along line B-B in FIG. 1.
5 is a cross-sectional view taken along line C-C of FIG. 1.
Figure 6 is a perspective view of the inside of the noise reduction panel for noise diffraction induction of the high-functional interference type noise reduction device according to the present invention.
Figure 7 is a perspective view of the outside of the noise attenuation panel for noise diffraction induction of the high-functional interference type noise reduction device according to the present invention.
8 is a perspective view of a noise attenuation panel for inducing noise diffraction and a noise attenuation panel for inducing noise diffraction of the high-functional interference-type noise reduction device according to the present invention in a separated state.
9 is a longitudinal cross-sectional view of a noise attenuation enclosure in which a noise attenuation panel for inducing noise diffraction and a noise attenuation panel for inducing noise diffraction of a high-functional interference-type noise reduction device according to the present invention are assembled.
10 is a cross-sectional view of a noise attenuation enclosure in which a noise attenuation panel for inducing noise diffraction and a noise attenuation panel for inducing noise diffraction of a high-functional interference-type noise reduction device according to the present invention are assembled.
11 is a side view of a noise attenuation panel for inducing noise diffraction for explaining the operating state of the high-functional interference type noise reduction device according to the present invention.
12 is a combined perspective view of the high-functional interference-type noise reduction device according to the present invention in a state in which a contraction and expansion countermeasure is installed on the top of the soundproof wall.
13 is an exploded perspective view for explaining the contraction expansion countermeasure according to the present invention.
Figure 14 is a perspective view of the installation state of the contraction expansion countermeasure according to the present invention.
15 is a plan view of an operating state of the means for contraction and expansion according to the present invention.

The present invention relates to a high-functional interference-type noise reduction apparatus capable of effectively reducing noise propagating beyond the sound insulation wall without increasing the height of the sound insulation wall, which will be described in detail through the embodiments of the accompanying drawings.

1 is a combined perspective view of a state in which a high-functional interference-type noise reduction device according to the present invention is installed on an upper portion of a soundproof wall.

According to this, the noise reduction device 200 according to the present invention is a soundproof wall constructed by stacking a sound-absorbing plate or a blocking plate or a soundproof panel 120 made of a transparent plate and/or a composite plate between the posts 110 and the posts 110 (100) It is installed on the top.

The noise reduction device 200 may include a plurality of noise attenuation enclosures 200A formed by assembling a noise attenuation panel 210 for inducing noise diffraction and a noise attenuation panel 210 for inducing noise diffraction.

The noise reduction device 200 of this configuration is installed in the transverse direction between the strut 110 and the strut 110 at the top of the soundproof wall 100, so that the noise generated from the vehicle or the noise caused by the wind pressure from the river or the beach, etc. Noise caused by mechanical vibration crosses the soundproof wall 100 and makes it possible to reduce the diffracted noise by the noise reduction device 200, and the soundproof wall 100 on which the noise reduction device 200 is installed is Or, it can be installed on a road central separation zone or bridge to improve noise reduction efficiency.

2 is an exploded perspective view of a high-functional interference-type noise reduction device according to the present invention.

According to this, the noise reduction device 200 includes a'U'-type fastener 220 installed on the front and rear surfaces of the posts 110; A fixed square pipe 230 for fixing a support member, which is fitted in a lengthwise length in the transverse direction to each of the'U'-type fasteners 220; A leakage blocking member 240 fitted and fixed in the space between the inner surface of the fixed square pipe 230 for fixing the support member and the front surface of the soundproof panel 120; A piece of fixing the U'-shaped fixture 220 and the fixed square pipe 230 for fixing the support member by interviewing the inner side of the lower bent portion 250A on each of the front and rear outer surfaces of the fixed square pipe 230 for fixing the support member. A support member 250 fixed with 260; Including; fixing bolts 270 for interfacing and fixing the inner surfaces of the lower brackets 210A of each of the noise attenuation panels 210 for noise diffraction induction on the outer surface of the upper bent portion 250B of the support member 250 by interviewing and fixing the inner surfaces of the lower brackets 210A of each of the noise diffraction induction panels 210. However, by assembling a noise attenuation panel 210 for inducing noise diffraction at the front end and a noise attenuation panel 210 for inducing noise diffraction at the rear end to form a single noise attenuation enclosure 200A, these noise attenuation enclosures 200A It can be configured by assembling them together.

The support member 250 has an upper sealing plate 250C sealed in a flat plate shape by an upper bent portion 250B, and a noise attenuation panel 210 for inducing noise diffraction on the upper surface of the upper sealing plate 250C. ), the lower surface of the bottom part 210B between the lower bracket 210A and the lower bracket 210A may be interviewed to form a combination.

The noise attenuation panel 210 for inducing the noise diffraction includes a main board 211; A plurality of noise induction guide path dividing plates 212 integrally formed on one side of the main board 211 and protruding at regular intervals in the vertical direction; Including a plurality of curved noise friction pieces (212A) protruding to both sides of each of the noise induction guide path dividing plate disposed on the noise diffraction path part 213 formed by the noise induction guide path dividing plate 212 By doing so, the shape of the structure of the noise attenuating panel 210 for noise diffraction induction can be simplified geometrically and provided, as well as the characteristic of the mold injection technology, it is easy to manufacture the mold, thereby improving the productivity, thereby reducing the manufacturing cost.

In the present invention of this configuration, the diffraction noise introduced into the noise attenuation panel 210 for noise diffraction induction collides in a zigzag form along the noise friction piece 212A disposed in the path part 213 of the diffraction noise and diffracts at the same time. It is possible to introduce noise in a whirl-like manner while changing the direction of noise inflow, so that the diffraction noise path length for rapid inflow of diffraction noise as well as diffraction noise attenuation can be lengthened, and the bottom part 210B of the noise attenuation box 200A ), the sound wave phase reflected on the upper surface of the sound wave also changes the direction of discharging the diffraction noise along the noise friction piece 212A and collides with the noise friction piece 212A in a zigzag form, as if the noise was discharged and introduced into a whirlwind. Tuning sound suitable for noise reduction can be generated through a destructive interference phenomenon with diffraction noise obtained by collision with noise, thereby effectively attenuating the noise.

Therefore, in the present invention, the number of diffraction noise friction is greatly increased by the noise friction piece 212A, thereby amplifying reflection, multiple diffraction, and interference phenomena of diffraction noise, thereby enhancing acoustic interference effect as well as the length of the diffraction noise inflow path. The length of the Diffraction Noise is further extended to enhance the acoustic interference effect, as well as the increase in the length of the diffraction noise inflow path to secure a dual effect, and thus, the introduced noise is prevented by destructive interference generated through multiple diffraction and noise friction. It is to provide a new type of high-functional interference type noise reduction device that can effectively reduce noise having a frequency band of the domain.

The noise induction guide path dividing plate 212 is formed at a predetermined interval in front and rear of the noise induction guide path dividing plate 212 in the center, and the upper part is curved outward, and the noise is diffracted by protruding obliquely toward the bottom. By forming the upper part of the path part 213 to be wide and the lower part to be narrow, the diffraction noise flowing into the noise attenuation panel 210 for noise diffraction induction is quickly introduced, as well as the noise rising to the upper part of the soundproof wall 200 to the outside. It is possible to easily flow into the noise attenuation panel 210 for inducing noise diffraction through the upper end of each of the curved noise induction guide path dividing plate 212.

In addition, the noise attenuation enclosure 200A is formed by assembling a noise attenuation panel 210 for inducing noise diffraction at the front end and a noise attenuation panel 210 for inducing noise diffraction at the rear end to form a single noise attenuation enclosure 200A. It can be configured by collectively assembling the attenuation enclosure (200A).

The noise attenuation panel 210 for noise diffraction induction includes a fitting guide protrusion 211A for guiding the end of the noise induction guide path divider 212 on the other side of the main board 211 and a noise induction guide path divider 212 It can be formed by matching the fitting groove 211B into which the end of the main board 211 corresponds to the noise induction guide path dividing plate 212 on one side of the main board 211, and protrudes at both ends of the noise induction guide path dividing plate 212 A fitting groove 211B' into which the formed noise friction piece 212A is fitted may be formed to correspond to both ends of the fitting groove 211B.

Accordingly, the noise induction guide path diffraction plate 212 of the main board 211 constituting the noise attenuation panel 210 for inducing noise diffraction at the front end of each end and the end of the noise friction piece 212A induces noise diffraction at the rear end. Noise attenuation panel 210 for inducing noise diffraction at the front and rear ends by guiding through the fitting guide protrusion 211A formed on the other side and being inserted into the fitting groove 211B and the fitting groove 211B' A single noise attenuation enclosure 200A may be formed through a solid combination as well as an easy assembly 210, and the noise reduction device 200 of the assembly may be configured by assembling these noise attenuation enclosures 200A.

The assembly of the noise attenuation enclosure (200A) of this configuration is not only simple and quick to assemble without additional bolts, etc., but also maintains a sturdy assembly state, and induces noise diffraction that constitutes the noise attenuation enclosure (200A). As described above, diffraction noise introduced into the interior between the noise attenuation panel 210 and the noise attenuation panel 210 for inducing noise diffraction can be effectively attenuated as described above.

In particular, the noise attenuation panel 210 for inducing noise diffraction at the front end of the noise attenuation panel 210 for inducing noise diffraction at the front end of the noise attenuation panel 210 for inducing noise diffraction at the front end of the noise attenuation panel 210 ) By inserting the end of the noise induction guide path dividing plate 212 on one side of the main board 211 to prevent leakage of diffraction noise introduced into the path part 213 of the diffraction noise, thereby improving noise reduction efficiency.

On the other hand, when the interference type noise reduction device according to the present invention is installed on the bridge and the bridge structure contracts and expands due to the temperature difference in accordance with seasonal temperature changes and the bridge moves, the noise reduction device 200 may be damaged or fall, resulting in safety issues. In order to prevent the emergence of, the present invention can be provided by installing a contraction and expansion countermeasure 300 between the noise reduction device 200 of the assembly and the noise reduction device 200 of the assembly.

The contraction and expansion corresponding means 300 is the first support member 250-1 installed between the one side post 110A of the sound insulation wall 100 and the central post 110B of the sound insulation wall 100 and the other side post of the sound insulation wall 100 A bent fixed support plate 310 fitted inside the gap (d) between the second support member 250-2 installed between the 110C and the central post 110B of the sound insulation wall 100; The hole 310A drilled in the upper portion of the bending fixing support plate 310 and the hole 250-2A drilled in the upper surface of the second support member 250-2 correspond to each other, and at the same time, the side surface of the bending fixing support plate 310 Holes (250-2B') drilled in the drilled 310B and the upper bent portion 250-2B of the second support member 250-2 and the hole drilled in the lower bent piece 320A of the fixed sealing plate 320 ( 320A') corresponding to each other and fixed by fixing bolts (270A) and installed fixed sealing plate 320; The first supporting member (250-1) coupled to the main board (211) of the rear-end noise diffraction induction noise attenuation panel (210) is coupled with a coupling bolt (270B) to one side of the bent piece (330A) of the slide plate. 1 A slide plate 330 that expands and contracts due to a temperature difference of the support member 250-1, but the upper one side bent piece 320B of the fixed sealing plate 320 is a second support member 250- 2) The main board 211 of the noise attenuation panel 210 for inducing noise at the front end coupled to the other side of the main board 211 is fixed with a fixing bolt 270C, and the slide plate 330 is attached to the rear surface of the fixed sealing plate 320. By configuring the front face to be interviewed, the space between the noise reduction device 200 and the noise reduction device 200 can be sealed at a normal time through the contraction and expansion countermeasure 300 to prevent leakage, and Accordingly, when the bridge structure contracts and expands due to the temperature difference and the structure of the bridge including the soundproof wall 100 moves, the first support member 250-1 or the second support member 250-2 also behaves at the same time. As the noise reduction device 200 coupled to the first support member 250-1 narrows the gap d, the slide plate 330 is moved while being interviewed along the rear surface of the fixed sealing plate 320 to improve the behavior of the bridge. As the rear surface of the fixed sealing plate 320 is interviewed with the front surface of the slide plate 330 while the noise reduction device 200 is accommodated or coupled to the second support member 250-2 narrows the gap (d) It is moved to accommodate the behavior of the bridge.

In the drawing, 220A' is a long hole formed in the'U'-shaped fixture 220, and the bridge structure contracts and expands due to the temperature difference according to the seasonal temperature change, so that the structure of the bridge including the soundproof wall 100 behaves, and the first supporting member ( 250-1) and the fixed square pipe 230 for fixing the support member, in response to this, the fixing piece 260 can also move together, and the first support member 250-1 and the fixed square pipe for fixing the support member ( 230) may also be formed by drilling a long hole corresponding to the long hole (220A).

Accordingly, the present invention prevents falling bridges or leakage of the noise reduction device 200 through the contraction and expansion countermeasure 300 in response to the bridge behavior caused by the temperature difference of the bridge, and at the same time multiple diffracts the diffraction noise in an interference type. It provides a high-function interference-type sound insulation wall that attenuates.

The embodiments have been described above, but these are only examples and do not limit the present invention, and those of ordinary skill in the field to which the present invention pertains will not be exemplified above without departing from the essential characteristics of the present embodiment. It will be seen that various modifications and applications are possible.

And, differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

100: soundproof wall 110: support
120: soundproof panel 200: noise reduction device
200A: noise attenuation enclosure 210: noise attenuation panel
211: main board 211A: fitting guide projection
212: noise induction guide path divider 213: noise diffraction path part
250: support member 300: contraction expansion countermeasure
310: fixed base plate 320: fixed sealing plate
330: slide plate

Claims (5)

Assemble a noise attenuation panel 210 for inducing noise diffraction with a noise diffraction path and a noise attenuation panel 210 for inducing noise diffraction, but the lower bracket 210A of each of the noise attenuation panel 210 for inducing noise diffraction The soundproof wall 100 is installed in the longitudinal direction between the support member 250 installed on the top of the soundproof wall with a fixing bolt 270 and installed in the longitudinal direction between the support member 110 and the support 110 at the top of the soundproof wall, and a noise attenuation panel for inducing the noise diffraction 210, the main board 211; A plurality of noise induction guide path dividing plates 212 integrally formed on one side of the main board 211 and protruding at regular intervals in the vertical direction; Including a plurality of curved noise friction pieces (212A) protruding to both sides of each of the noise induction guide path dividing plate disposed on the noise diffraction path part 213 formed by the noise induction guide path dividing plate 212 In the noise reduction device 200, which is configured by installing a contraction and expansion countermeasure 300 between the noise reduction device 200 and the noise reduction device 200, the shrinkage and expansion countermeasure 300 is a soundproof wall 100 The first support member 250-1 installed between the one side post (110A) and the center post (110B) of the sound insulation wall 100 and the other side post (110C) of the sound insulation wall 100 and the center post (110B) of the sound insulation wall 100 ) A fixed support plate 310 that is bent and inserted into the space d between the second support members 250-2 installed between the two; The hole 310A drilled in the upper portion of the bending fixing support plate 310 and the hole 250-2A drilled in the upper surface of the second support member 250-2 correspond to each other, and at the same time, the side surface of the bending fixing support plate 310 The hole 250-2B' drilled in the middle bent portion 250-2B of the drilled 310B and the second support member 250-2 and the hole drilled in the lower bent piece 320A of the fixed sealing plate 320 ( 320A') corresponding to each other and fixed by fixing bolts (270A) and installed fixed sealing plate 320; The first supporting member (250-1) coupled to the main board (211) of the rear-end noise diffraction induction noise attenuation panel (210) is coupled with a coupling bolt (270B) to one side of the bent piece (330A) of the slide plate. 1 A slide plate 330 that expands and contracts due to a temperature difference of the support member 250-1, but the upper one side bent piece 320B of the fixed sealing plate 320 is a second support member 250- 2) The main board 211 of the noise attenuation panel 210 for inducing noise at the front end coupled to the other side of the main board 211 is fixed with a fixing bolt 270C, and the slide plate 330 is attached to the rear surface of the fixed sealing plate 320. High-functional interference-type noise reduction device, characterized in that it is constructed by interviewing the front face. The method of claim 1, wherein the noise attenuation panel 210 for noise diffraction induction includes a fitting guide protrusion 211A for guiding the end of the noise induction guide path dividing plate 212 on the other side of the main board 211 and the noise induction guide. A fitting groove 211B into which the end of the path dividing plate 212 is fitted is formed in correspondence with the noise inducing guide path dividing plate 212 on one side of the main board 211, and the noise inducing guide path dividing plate 212 The fitting grooves 211B' into which the noise friction pieces 212A protruding are formed at both ends of the fitting groove 211B are formed corresponding to both ends of the fitting groove 211B, but the noise attenuation panel 210 for inducing noise diffraction at the front end A high-functional interference type noise reduction device, characterized in that the noise attenuation panel 210 for noise diffraction induction is assembled to form a single noise attenuation enclosure (200A), and these noise attenuation enclosures (200A) are assembled and assembled.

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