KR20150141842A - Shooting Range - Google Patents

Abstract

The present invention provides a noise reducing facility of a shooting range. A plurality of lanes of fire are formed on the front part opened in the direction of a bulletproof slope, and an absorption panel is installed on a ceiling structure, both lateral structures, and a rear wall structure, the sound absorption panel having a structure where a sound absorption material fills the interior of the enclosure having a plurality of sound absorption holes perforated on the front surface. The noise reducing facility comprises a blocking wall vertically installed on a vertical end of a front side of the ceiling structure in a lower direction to block diffracted explosion noise and is formed by a plurality of sound absorption panels or further comprises pillars and a double soundproof wall. The pillars are vertically installed on a vertical end of the rear side of the ceiling structure in an upper direction to offset the diffracted explosion noise and are installed and spaced from each other at predetermined intervals. The double soundproof wall is stacked between the pillars. According to the present invention, smooth ventilation can be achieved, and diffracted noise can be reduced, thereby resolving the problem caused by explosion noise.

Description

Shooting Range Noise Reduction Facility {Shooting Range}

The present invention relates to a noise reduction facility, and more particularly, to a noise reduction facility for a shooting range applied to an outdoor shooting range.

As you know, it is noise that occupies a high proportion of environmental pollution and civil complaints caused by the damage. Damage caused by noise may not only interfere with the normal daily activities of a person, but can also cause physical and mental disorders if serious. In this regard, the noise from the outdoor shooting range using a rod is not very large compared with the noise of the aircraft, but the possibility of a complaint is very high because the shooting range is usually adjacent to the private house and the number is large. For example, in the case of a military firefighting field shooting range, the development speed of the surrounding area of the military base was accelerated due to the expansion of the city, so that the shooting range, which was previously in the private house and the remote area, was located around the residence of the residents. , The situation in which the shooting range, which is essential for the military training for the people, is rather hindered.

The noise of the shooting range, that is, the percussive noise, is the sound generated by the air ejection (omnidirectional storm wave), the sound generated by the release of the bullet (bullet plague sound, (Propulsion gas storm wave). Thus, the impact noise of the shooting range noise is mostly occupied by the impact noise, and the shock noise of the shooting range has a short duration and a high acoustic intensity, which makes it more uncomfortable than other noise of the same energy due to sharpness.

Generally, the sound intensity decreases with distance from the sound source due to the attenuation of the negative sound. Therefore, it is the best solution to the problem of the range noise. It is the best solution to secure the distance between the range and the private area. Cost problems, and so on. As a result, it is urgently required to make improvements.

1 is a side cross-sectional view for describing a shooting range disclosed in Korean Patent Application Publication No. 2012-545.

Referring to FIG. 1, Korean Patent Publication No. 2012-545 (published Jan. 02, 2012) is constructed so as to have a soundproof space, and has a plurality of silo openings so that the shooting water can be shot toward the outside in this soundproof space A plurality of sound absorbing structures (400) connected to the sound insulating structures (200) respectively and providing sound absorbing passages which are connected to the respective sound absorbing structures (200) And a connecting structure 600 provided with a connecting passage for connecting the sound-absorbing structure 400. Such a Korean Patent Application Publication No. 2012-545 discloses a soundproofing structure 200 having a dome structure and a sound absorbing structure 400 provided in a silo having a duct structure, The sound insulation structure 200 absorbs and blocks the percussion noise propagating backward from the slope in the sound insulation space and the sound absorption structure 400 absorbs and propagates the percussion noise propagating forward in the slope, And the connection structure 600 performs a function of passing and absorbing a part of the percussion noise propagating forward in the warp.

However, since the above-mentioned Korean Patent Application Publication No. 2012-545 discloses that the ratio of the open portion in the entire shooting range, that is, the opening ratio is about 5%, the ventilation of the soundproof space during the shooting and a part of noise are discharged to prevent the hearing loss At least one outlet is provided on the rear wall of the soundproofing structure 200. The noise emitted to the outside through the outlet is consequently transmitted to the sound source and thus the noise reduction effect is deteriorated.

In addition, the above-mentioned Korean Patent Application Publication No. 2012-545 has a problem that a part of the percussion noise transmitted to the front of the sound-absorbing structure 400 is diffracted and is transmitted to the rear of the sound-deadening structure on the sound- This diffraction noise is measured by noise from a sound source, which is another factor to lower the noise reduction effect.

On the other hand, in the above-mentioned Korean Patent Publication No. 2012-545, since the front part in the direction of the bullet-proof slope is opened only by the sound-absorbing passage of the sound-absorbing structure 400 in view of the entire structure of the shooting range, There is a structural problem that it is difficult to control the shooting smoothly because the shooting controller can not visually confirm the situation in the forward direction, that is, the direction toward the bullet-proof slope. In other words, the shooting range disclosed in Korean Patent Publication No. 2012-545 is configured so that the sound-absorbing structure 400 has a sound-absorbing passage of a certain length serving as a dead body, and the sound-absorbing passage of each sound- And the connection structure 600 serves as an obstacle which can not be visually recognized as the obstacle. Therefore, the fire control structure 400 is installed in the interior of the sound-absorbing structure 400, This is a structural problem that is difficult to control smoothly.

On the other hand, in Korean Patent Laid-Open Publication No. 2012-59977 (published on June 11, 2012), one side of a sound absorbing material faces a shooting training site, and the other side of a sound absorbing material starts a sound barrier installed toward a nearby town. However, the sound barrier disclosed in Korean Patent Laid-Open Publication No. 2012-59977 can be installed at a predetermined distance below the shooting training area to partially absorb or block the percussion noise generated in the shooting training area, but a part of the percussion noise is diffracted, The noise reduction effect is insignificant because it is transmitted to the sound receiving point.

Accordingly, the present invention has been made to solve the general problems of the conventional shooting range,

A problem to be solved by the present invention is to provide a silencing noise reduction facility capable of minimizing the propagation of percussion noise to a sound receiving point located behind a range of sounding points, .

Another object of the present invention is to provide a shooting range noise reduction facility capable of performing smooth shooting control by providing a structure for visually identifying a shooting situation in the direction of a bullet-proof slope while attenuating percussion noise.

As a concrete means of the present invention for solving the above-mentioned problems,

And a sound absorbing panel having a structure in which a sound absorbing material is filled in the inside of a housing in which a plurality of sound absorbing holes are formed in the front wall of the ceiling structure, the side wall structure and the rear wall structure, In a noise reduction facility,

And a blocking wall formed of the plurality of sound absorbing panels to block the percussion noise installed vertically downward in the front end portion of the ceiling structure.

In a preferred embodiment of the present invention, a double soundproof wall is installed at the rear end portion of the ceiling structure in a vertically upward direction to cancel the diffraction noise generated by the double soundproof wall. The double soundproof wall includes a column, And a plurality of soundproof panels laminated and installed between the first and second soundproof panels.

As a preferred embodiment, the sound-absorbing panel can be vertically or horizontally coupled to the sound-absorbing panel and the sound-absorbing panel by being coupled with the vertical assembly angle or the horizontal assembly angle on the rim of the front and rear surfaces of the case.

As a preferred embodiment, the soundproof panel may be one of a sound-absorbing sound-absorbing panel having a structure in which a sound absorbing material is filled in a housing in which a plurality of sound-absorbing holes are perforated on the front surface, or a reflective sound- can do.

According to a preferred embodiment of the present invention, it is possible to provide a structure in which the width of the warp becomes narrower toward the front, and a proximity reduction structure in which the sound-absorbing panel including the sound-absorbing material is installed on the inner wall and the ceiling.

As a preferred embodiment, in order to reduce shooting noise, an extended sound barrier made up of a plurality of the soundproof panels may be extended from the both side wall structures in the direction of the anti-bullet hole.

More preferably, the extended soundproof wall comprises an extension strut installed at a predetermined interval on a concrete foundation, and the plurality of sound absorbing panels installed with the extended strut as an intermediate, can do.

The noise reduction facility of the present invention can minimize the propagation of the percussion noise to the sound receiving point located behind the range by installing the sound absorbing panel in the ceiling structure, the side wall structure and the rear wall structure, It is possible to visually identify the shooting situation together with the smooth ventilation according to the open structure, so that it is possible to perform smooth fire control. In addition, the present invention further includes a blocking wall or a double sound barrier to attenuate the diffraction noise, thereby minimizing the occurrence of complaints in the vicinity of the shooting range due to perception noise.

1 is a side cross-sectional view for explaining a shooting range disclosed in Korean Patent Publication No. 2012-545.
FIG. 2A is a side cross-sectional view illustrating an entire structure of a silencing noise reduction facility according to the present invention.
FIG. 2B is a side cross-sectional view illustrating a state where a double sound barrier wall is included in a silencing noise reduction facility according to the present invention.
FIG. 3 is a front view of the entire structure of a silencing noise reduction facility according to the present invention.
FIG. 4 is a side view illustrating the entire configuration of a silencing noise reduction facility according to the present invention. Referring to FIG.
FIG. 5A is a plan view for explaining the overall configuration of a shooting range noise reduction facility according to the present invention. FIG.
FIG. 5B is a plan view of a skateboard noise reduction facility according to the present invention.
6A is a perspective view for explaining a sound absorption panel in a shooting range noise reduction facility according to the present invention.
6B is a cross-sectional view illustrating a sound absorbing panel in a shooting range noise reduction facility according to the present invention.
7A to 7E are cross-sectional views illustrating a coupling state of a sound absorption panel in a shooting range noise reduction facility according to the present invention.
8A and 8B are side cross-sectional views for explaining a double acoustic barrier in a shooting range noise reduction facility according to the present invention.
FIG. 9 is a front elevational view of a main part for explaining a double sound barrier in the shooting range noise reduction facility according to the present invention. FIG.
10 is a side cross-sectional view for explaining another embodiment of the shooting range noise reduction apparatus according to the present invention.
FIG. 11 is a schematic view for explaining a proximity reduction structure in a shooting range noise reduction apparatus according to the present invention.
FIG. 12 is a plan view for explaining an extended sound barrier in a shooting range noise reduction facility according to the present invention.
FIG. 13 is a side view for explaining an extended sound barrier in a shooting range noise reduction facility according to the present invention. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The noise reduction facility of the present invention is a noise reduction facility that is integrally formed with a shooting range where a large number of warheads are provided, and a forward portion that opens in the direction of the bulletproof slope surface is provided to visually identify the shooting situation in the direction of the bullet- I will reveal.

2a to 5a, the range noise reduction facility 1, 1 'of the present invention includes a plurality of traps 7, a ceiling structure 4, a side wall structure 3, a rear wall structure 2), further comprising a blocking wall (6) or a blocking wall (6) and a double sound barrier wall (5).

The shooting range to which the present invention is applied is a building structure in which a bullet-proof slope, for example, an opening 11 is provided in the direction of a bullet-proof slope from which a bullet is fired, 2, and a plurality of warp yarns 7 are provided in the opening 11. [ At this time, the ceiling structure 4, the side wall structures 3 and the rear wall structure 2 are steel structures having H beams as a frame structure. Thus, the side wall structures 3 and the rear wall structures 2 The vertical H beams 22 and 32 are vertically installed at predetermined intervals with a concrete base (not shown in the figure) as a medium, and the horizontal H beams 42 forming the ceiling structure 4 are vertically installed on both sides Is horizontally coupled to the vertical H beams (22, 32) of the wall structure (3) and the rear wall structure (2) by welding or bolt coupling. At this time, the vertical H beams 22 and 32 of the side wall structures 3 and the rear wall structure 2 are horizontally moved by the horizontal H beams 23 and 33 (metal frames can be used) Can be connected to each other. The vertical H beam 32 of the side wall structure 3 may be an H beam having a different length, that is, a front side A vertical H beam 32 is used, which becomes longer as it goes to the front side where the " H " The horizontal H beam 42 of the ceiling structure 4 has a lower end fixed to the ground to support the load of the vertical column 43 such as the ceiling structure 4 and an upper end fixed to the horizontal H beam 42 It is preferable that the vertical columns 43 to be connected are arranged at predetermined intervals.

6A and 6B, the ceiling structure 4, the side wall structures 3 and the rear wall structure 2 include sound-absorbing panels 21, 31 and 41 having a sound-absorbing material embedded therein. The sound absorbing panels 21, 31 and 41 have a structure in which the sound absorbing members 212a, 312a and 412a are filled in the housing bodies 212, 312 and 412 in which a plurality of sound absorbing holes 211, 31, 41 and the sound-absorbing panels 21, 31, 41 and the H beams 22, 32, 42 are attached to the front and rear edges of the front and rear panels 31, Horizontal and vertical assembling angles 213, 214, 313, 314, 413 and 414 for connecting the bolts to each other are coupled with the vertical and horizontal assembling angles 213, 214, 313, 314, 414 and 414 in which the slots 215, At this time, a packing (p), for example, a soft synthetic resin, is installed in the connection portion of the vertical and horizontal assembly angles (213, 214, 313, 314, 413, 414)

7A shows a combination of the two side wall structures 3 and the vertical H beams 22 and 32 of the rear wall structure 2 and the sound absorbing panels 21 and 31, A combination of the horizontal H beam 42 and the sound-absorbing panel 41 is shown in Fig. 7B. Basically, the sound-absorbing panels 21, 31 and 41 are connected in a horizontal direction by bolting the vertical assembly angles 213, 313 and 413, as shown in FIG. 7C. The two side wall structures 3 and the vertical In order to connect the horizontal H beams 42 of the H beams 22 and 32 or the ceiling structure 4 and the sound absorbing panels 21 and 31 and 41 to the vertical H beams 22 and 32 as shown in FIGS. And the horizontal H beam 42 are installed to connect the connecting angle a with the vertical assembling angles 213 and 313 or the horizontal assembling angle 413 of the sound- do. The sound absorbing panels 21 and 31 of the side wall structures 3 and the rear wall structure 2 and the sound absorbing panel 41 of the ceiling structure 4 are positioned in the same direction as the horizontal assembling angles 214, To each other. In addition, the sound-absorbing panels 21, 31 coupled to the transverse H beams 23, 33 are also connected by bolting the horizontal assembling angles 214, 314 to the transverse H beams 23, 33, as in FIG.

Accordingly, the sound-absorbing panels 21, 31 and 41 are connected to the ceiling structure 4, the side wall structures 3 and the rear wall structure 2 through the vertical and horizontal assembly angles 213, 214, 313, 31, 41) of the sound absorbing panels (21, 31, 41) are rigidly connected to the beams (22, 32, 42) or neighboring sound absorbing panels (21, 31, 41) to form a ceiling wall and both side walls and a rear wall. And the sound absorbing members 212a, 312a, and 412a absorb the percussion noise through the sound absorbing holes 211, 311, and 411 provided on the front surface thereof.

Alternatively, the sound-absorbing panel 21, 31, 41 may be formed by bolting the vertical assembly angles 213, 313, 413 and the horizontal assembly angles 214, 314, 414 to each other, The structure 4, the side wall structures 3, and the rear wall structure 2 can be formed. In other words, the sound-absorbing panels 21, 31 and 41 have vertical and horizontal assembling angles 213, 313, 413, 214, 314 and 414 installed on the front and back edges thereof. Therefore, by bolting the vertical and horizontal assembling angles 213, 313, 413, The side wall structures 3 and the rear wall structure 2 can be formed. In this case, for structural stability, horizontal H beams (23, 33: metal frame can be used) are fixed on the floor, and sound absorption It is preferable to fix the panels 21 and 31 to the horizontal H beams 23 and 33 (a metal frame can be used), and it is preferable to install a plurality of vertical columns 43 in the ceiling structure 4 Do.

Referring again to FIG. 2A or 2B, the blocking wall 6 is vertically installed in the downward direction at the front end of the ceiling structure 4. The blocking wall 6 is formed by the plurality of sound absorbing panels 61, the ceiling structure 4, the side wall structures 3 and the sound absorbing panels 21, 31, The horizontal and vertical assembling angles 613 and 614 are connected by bolts or connected to the sound absorbing panel 41 of the ceiling structure. At this time, it can be fixed to the horizontal H beam 42 of the ceiling structure 4 by using the auxiliary angle b for rigid installation as shown enlarged in FIG. 2A or 2B. According to such a configuration, the blocking wall 6 performs a function of blocking the diffracted noise moving to the ceiling outer surface of the ceiling structure 4 during the percussion noise by absorbing and canceling the noise.

Referring again to FIGS. 2B to 4, the double sound barrier wall 5 is installed vertically upwards in the rear end portion of the ceiling structure 4. 8A, 8B and 9, the double sound insulating wall 5 has a structure in which a column 51 (H beam is applied) spaced apart at a predetermined interval and a laminate 51 between the column 51 and the column 51 And a plurality of soundproof panels 52 to be installed. The struts 51 of the double sound barrier wall 5 are connected to the vertical H beam 22 of the rear wall structure 2 or the horizontal H beams 42 of the ceiling structure 4 by a welding method or a bolt- The soundproof panel 52 has a sound absorbing sound insulation panel 522 having a known structure in which a sound absorbing material 522a is filled in a housing 522 in which a plurality of sound absorbing holes 521 are drilled on the front surface as shown in FIG. Or a reflection type soundproof panel (not shown in the figure) having a known structure in which a rectangular frame is provided on the outer periphery of the transparent panel. In addition, it is preferable to connect the reinforcing wire 53 fixed to the floor or the ceiling structure for the structural stability, and the double sound barrier wall 5 is preferably connected to the connecting portion of the pillars 51 of the double sound barrier wall 5, 8b, the hook 51 is connected to the vertical H beam 22 of the ceiling structure 2 or the horizontal H beam 42 of the ceiling structure 4, Can be fixed. According to this configuration, the double sound barrier wall 5 diffracts a part of the percussion noise and is transmitted to the rear of the shooting range on the outer surface of the ceiling of the ceiling structure 4 (when there is an obstacle in the sound field, The noise is absorbed by the sound-absorbing panel 52, or the sound is canceled by the reflection method.

Referring again to FIG. 2, the blocking wall 6 is installed vertically downward at the front end of the ceiling structure 4. The blocking wall 6 is formed by the plurality of sound absorbing panels 61, the ceiling structure 4, the side wall structures 3 and the sound absorbing panels 21, 31, The horizontal and vertical assembling angles 613 and 614 are connected by bolts or connected to the sound absorbing panel 41 of the ceiling structure. At this time, it can be fixed to the horizontal H beam 42 of the ceiling structure 4 by using the auxiliary angle b for rigid installation as shown in enlarged view in FIG. According to this construction, the blocking wall 6 functions to block diffracted noise moving to the ceiling outer surface of the ceiling structure 4 during perception noise primarily by sound absorption and cancellation.

In the meantime, the shooting range noise reduction facility (1, 1 ') of the present invention includes a shooting control room (12). Such shooting control room (12) can be installed in a protruding shape at the central portion of the rear wall structure have. Alternatively, the fire control room 12 'may be constructed inside the noise reduction facility 1' 'with the rear wall structure 2 as a plane as shown in FIG.

Although the sound absorbing panels 21 and 31 included in both the side wall structures 3 and the rear wall structure 2 are not shown in the drawings as described above, The vertical H beams 22 and 32 of the side wall structures 3 and the rear wall structure 2 are installed at predetermined intervals corresponding to the width of the soundproof panel 52, A plurality of soundproof panels 52 are stacked between the H beams 22 and 32 and the vertical H beams 22 and 32 to form the side wall structures 3 and the rear wall structure 2 will be.

Hereinafter, the operation state of the shooting range noise reduction facility according to the present invention will be described.

First, in order to estimate the estimated noise reduction amount according to the layout plan of the shooting range noise reduction facility of the present invention, the noise level at the expectation point of the civil service at the specific military shooting range is calculated as a comparative example, and the estimated noise of the shooting range noise reduction facility The attenuation was calculated.

[Specific military range environmental conditions]

1. The resources of the shooting range.

Shooting structure: Same structure as a general military shooting range with a box-shaped front, left, and right sides open.

Length: 48 m, Width: 6.5 m, Height: 4.7 m, Number of traps: 8

2. Arrangement of private house and shooting range,

Private house 1: Distance to the shooting range (140m), gradient (level) car (20m), height (17m)

Private house 2: distance from shooting range (830m), gradient (level) car (31m), height (1.5m)

Here, the noise of the rifle (k2) is an impact noise due to the muzzle storm, and the center frequency is 250 ~ 10000 (Hz), and the sound duration is about 130dB. According to the Basic Law of the civilian environmental policy, which is expected to cause civil complaints, the noise tolerance standard is 55 ~ 65dB weekly average and 45 ~ 55dB at night. The percussion noise in the warfare is the result of simultaneous shooting with six shooting ranges. Table 1 shows the results.

On the basis of the noise data from these six guns, the noise level was obtained as 123.9dB at the same time with eight guns, and the equivalent noise level for 5 minutes (same day and night) was calculated through Equation (1).

Equivalent noise for 5 minutes / 1 shot for 5 minutes (Leq / 5min) = 96.5 dB (A)

5 minutes Equivalent Noise / 3 times for 5 minutes (Leq / 5min) = 101.3 dB (A)

In this case, the duration of shooting noise duration for 5 minutes is based on the maximum duration (0.55 seconds) and the number of fires.

Then, the predicted value of the noise level at the expected point of civil incidence was calculated based on the noise attenuation calculation formula according to the distance.

(Lr = distance attenuation, a = length of oblique line, b = length of oblique line), where Lr = 20 log (3r /

Predicted Noise Level in Residential Area (L) = Equivalent Noise Level for 5 minutes / 3 times for 5 minutes (Leq / 5min) - Distance Reduction (Lr).

[Comparative Example]

division Diagonal length
(Unit: m) Distance to the shooting range (unit: m)
Predicted Noise
(Unit: dB) Acceptance criteria
(Unit: dB) Excess amount for minimum allowance
(Unit: dB) Private house 1 48 140 73.4 Weekly: 55 ~ 65
Night: 45 ~ 55 Weekly: 16.3
Night: 26.3 Private house 2 48 830 58.0 Weekly: 55 ~ 65
Night: 45 ~ 55 Weekly: 3
Night: 13

[Comparative Example] Referring to Table 2, the predicted equivalent noise levels for the five minutes in the private house 1 and private house 2 near the specific shooting range are 73.4 dB and 58.0 dB, respectively, and the allowable standard set by the Environmental Policy Act is 26.3 dB dB (weekly).

[Example]

In the calculation of the estimated reduction amount of the range noise reduction facility according to the present invention, a triangle is formed as shown in Table 3, which connects the noise source, the top of the soundproof wall, and the sound receiving point on the basis of the path difference rule applied when calculating the height of a typical soundproof wall, At this time, the propagation path of the sound source becomes longer by the path difference (?), And the reduction effect (Ld) can calculate the diffraction attenuation value after N is obtained.

The method for calculating the performance of the soundproof wall will now be described with reference to Table 4;

The Fresnel number N1 for the direct sound is N1 = (A + B-d1) * 2F / 340

= F * [(Hb-Hs) 2 + Lsd2} + {(Hb-Ho) 2 + Lbo2}

- {{Hs-Ho) 2+ (Lsb + Lbo) 2}] / 170.

The Fresnel number N2 for the reflections

N2 = (A + B'-d2) * 2F / 340

= F * [(Hb-Hs) 2 + Lsd2} + {(Hb-Ho) 2 + Lbo2}

- {{Hs-Ho) 2+ (Lsb + Lbo) 2}] / 170.

Where H is the object's diffraction frequency in Hz, Hb is the height of the soundproof wall in m, Ho is the height of the sound receiving point in m, Hs is the height of the sound source in m, Lsb is the horizontal distance between sound source and sound barrier, And the horizontal distance (m) between the sound receiving points.

When N1 and N2 are substituted into N values in the following equations, a direct sound diffraction attenuation value Ld1 and a reflection sound diffraction attenuation value Ld2 can be obtained.

Ld = 7.5 + 0.61 log N (dB), 0 < N? 0.1

Ld = 10 + 3logN (dB), 0.1 < N &lt; = 0.8

Ld = 11 + 7logN (dB), 0.8 < N &lt; = 30

Ld = 12 + 6logN (dB), 30 < N? 60

Ld = 22 (dB)

Therefore, the diffraction attenuation value DELTA Ld due to the sound-

(10) (-Ld1 / 10) + 10 (-Ld2 / 10)}.

In addition, the performance calculation method of the range noise reduction facility including the double sound barrier wall as in the present invention will be described with reference to Table 5;

IL = ILx + ILy .5 + 20log (L / d)

Where IL = double acoustic barrier insertion loss, ILx = S → X → P diffraction attenuation, ILy = S → Y → P diffraction attenuation, L = chd diffraction distance, d = straight line distance between sound source and sound source .

Accordingly, the estimated noise attenuation amount of the noise reduction facility of the shooting range of the present invention can be calculated as follows in the case of MIGA-1 and MIGA-2 with the same conditions as those of the comparative example described above.

[Private House 1]

Table 6 shows the arrangement of private house 1 and the noise reduction facility at the shooting range. Table 7 shows the estimated sound attenuation calculation for the noise reduction facility at the shooting range of the present invention.

Referring to Table 6 and Table 7, the predicted noise level at the top of the private house 1 after installing the shooting range noise reduction facility of the present invention was 44.1 dB minus the expected attenuation of 27.2 dB at the pre-installation predicted noise level of 71.3 dB (The predicted noise level after the installation of the noise reduction facility in the private house 1 is the predicted noise level under the assumption that the firepower is fired simultaneously at the shooting range of 8 guns.

[Private House 2]

Table 8 shows the arrangement of private house 2 and the range noise reduction facility. Table 9 shows the estimated noise attenuation of the range noise reduction facility of the present invention for private house 2.

Referring to Table 8 and Table 9, the predicted noise level in the private house 2 after installing the shooting range noise reduction facility of the present invention was 29.8 dB minus the predicted attenuation of the noise reduction facility at 58.0 dB (The predicted noise level after the installation of the noise reduction facility in the private house 1 is the predicted noise level under the assumption that the firepower is fired simultaneously at the shooting range of 8 guns.

As a result of prediction of the noise level at the point of noise damage prediction, the noise reduction facility of the present invention satisfies the night standard (at least 45 dB) set by the Environmental Policy Basic Law in both the private house 1 and the private house 2 as shown in Table 10 .

division Estimated noise level before installation
(Unit: dB) Post-installation predicted noise level
(Unit: dB) Acceptance criteria
(Unit: dB) evaluation Private house 1 73.4 44.1 Weekly: 55 ~ 65
Night: 45 ~ 55 Within the minimum tolerance criteria Private house 2 58.0 29.8 Weekly: 55 ~ 65
Night: 45 ~ 55 Within the minimum tolerance criteria

Therefore, the shooting range noise reduction facility according to the present invention absorbs and cancels the percussion noise through the ceiling structure, the sound-absorbing panels of the side wall structures and the rear wall structure, and further includes the blocking wall or the double sound- So that it is possible to minimize civil complaints caused by shooting noises that may occur in a private area near a shooting range. Particularly, since the noise reduction facility of the present invention has a structure in which the front part is opened, the diffraction noise can be attenuated at the same time of smooth ventilation. Thus, And can perform smooth fire control. In addition, since the blocking wall and the double sound insulating wall include the sound absorbing panel or the soundproof panel, the diffracted noise is attenuated by the path difference and the function of absorbing and canceling the diffracted noise is performed, .

Referring to FIG. 5B again, the plurality of warp yarns 7 are arranged in the interior of the noise reduction facility 1, for example, the side of the opening 11, for example, a soundproof block made of a soft synthetic resin material (Not shown in the drawing). The warp yarns 7 are narrowed in width toward the front side and are provided with a proximity reducing structure 71 on which the sound absorbing panel 711 including the sound absorbing material is installed on the inner wall and the ceiling as shown in FIG. In other words, the proximity reduction structure 71 is structured such that the front and rear sides are opened, and the firearm is housed inside the firearm, and the sound-absorbing panel 711 is installed on the inner wall and the ceiling, That is, the sound absorption panel 711 absorbs and cancels the carbonated plosive sound generated by the omnidirectional storm wave and the ammunition release caused by air blowing prior to the muzzle of the bullet. At this time, it is preferable that the proximity reduction structure 71 can confirm the shooting place on the bullet-proof slope in front of the shooter and apply a size that can accommodate the gun inside. Accordingly, in the shooting control room 12 provided inside the shooting range noise reduction facility 1, the shooting controller can easily visually confirm the forward situation, that is, the situation in the direction of the bullet-proof slope, so that smooth fire control can be performed.

Referring to FIGS. 12 and 13, an extended sound barrier 8 extends from the side wall structure 3 in the direction of the anti-bullet hole in the side wall structure 3. As shown in FIG. The extended soundproofing wall 8 is composed of a plurality of the sound absorbing panels 81 for reducing shot noise. In order to install such a sound absorbing panel 81, a predetermined interval is set in a concrete foundation The extension pillars 82 are provided and the sound-absorbing panels 81, for example, horizontal and vertical assembling angles are bolted to the extension pillars 82, . Alternatively, the same structure as that of the above-described double sound barrier may be used. In this case, after the extension struts are installed at regular intervals on the concrete foundation, a sound absorption sound insulation panel or a reflection sound insulation panel is laminated between the extension strut and the extension strut. Construction can be done. At this time, the extended soundproof wall 8 can be extended with respect to the both side wall structures 3, so that the ceiling structure 4 and the blocking walls 6 (starting from the end of the side wall structures 3) ) Of the ceiling structure (4) after the side space is extended by the sound insulation wall (8). According to such a configuration, the extended soundproof wall 8 prevents the phenomenon that a part of the percussion noise is diffracted to be transmitted to the rear of the shooting range noise reduction facility 1 on the side wall structure 3, ) Absorbs and cancels the noise. Particularly, as the extension soundproof wall 8 is constructed in the expanded form as described above, it absorbs and cancels the percussion noise and induces the percussion noise in the direction of the bullet-proof slope, So that the phenomenon of transmission can be minimized.

It should be noted that the above-described embodiments are only illustrative and are not intended to limit the scope of the present invention. Accordingly, it should be noted that various modifications and changes may be made to the above-described embodiments. The scope of the present invention is defined in principle by the following claims.

1,1 ', 1 ": Shooting Range Noise Reduction Facility 2: Rear Barrier Structure
3: Double sided structure 4: Ceiling structure
5: Double soundproof wall 6:
7: Saro 8: Extended sound barrier
11: opening part 12: shooting control room
21, 31, 41, 61, 71,
22, 32: Vertical H beam 23, 33: Horizontal H beam
42: Horizontal H beam 43: Vertical pillar
51: column 52: soundproof panel
53: reinforcing wire 54:
71: Proximity abatement structure 82: Extension column
211, 311, 411: Sound absorbing balls 212, 312, 412:
212a, 312a, 412a: Sound absorbing material 213, 313, 413, 633:
214, 314, 414, 614: horizontal assembly angle
215,315,415: Long hole 521: Sound absorption ball
522: Housing 522a: Sound absorbing material
p: packing a: connecting angle b: auxiliary angle

Claims (7)

And a sound absorbing panel having a structure in which a sound absorbing material is filled in the inside of a housing in which a plurality of sound absorbing holes are formed in the front wall of the ceiling structure, the side wall structure and the rear wall structure, In a noise reduction facility,
And a blocking wall formed vertically downward at the front end portion of the ceiling structure to cut off the percussion noise diffracted and constructed of the plurality of sound-absorbing panels.
The method according to claim 1,
The double soundproofing wall is vertically installed at the rear end portion of the ceiling structure to offset the diffracted percussion noise. The double soundproofing wall is provided with a strut which is spaced apart at a predetermined interval, and is installed between the strut and the strut And a plurality of the soundproof panels.
The method according to claim 1,
Wherein the sound-absorbing panel is coupled to the front and rear edges of the housing by a vertical assembly angle or a horizontal assembly angle, so that the sound-absorbing panel and the sound-absorbing panel are coupled to each other longitudinally or laterally.
3. The method of claim 2,
Wherein the soundproof panel is one of a sound-absorbing sound-absorbing panel having a structure in which a sound-absorbing material is filled in a housing in which a plurality of sound-absorbing holes are perforated on the front surface, or a reflective sound-absorbing panel in which a square frame is provided around the outer surface of the transparent panel. Noise reduction facilities.
The method according to claim 1,
And a sound absorbing panel including a sound absorbing material on the inner wall and the ceiling, wherein the sound absorbing panel is installed on the inner wall and the ceiling.
The method according to claim 1,
Characterized in that an extended sound barrier consisting of a plurality of the soundproof panels is extended from the side wall structure in the direction of the bullet-proof slope in order to reduce shooting noises in the side wall structures.
The method according to claim 6,
Wherein the extended soundproof wall comprises an extension strut installed at a predetermined interval on a concrete foundation and the plurality of sound absorbing panels installed with the extended strut as a medium, and is constructed in an expanded structure with respect to the both sidewall structures Noise reduction facility.

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