KR101246510B1 - Noise reducing apparatus - Google Patents

Abstract

A noise reduction device is disclosed. The noise reduction device includes a sound barrier, a signal radiation device, a sound absorption device, and a signal processing device. The sound barrier is disposed adjacent to the movement path of the noise source, and includes a soundproof surface facing the movement path of the noise source and an opposite back surface. The signal scavenger is located above the rear surface, and emits an offset signal for canceling the noise traveling over the soundproof wall among the noise generated by the noise source. The sound absorbing device is located in the upper part of the rear surface, and collects the noises which are not extinguished by the cancel signal among the noises which proceeds beyond the soundproof wall. The signal processing apparatus generates an offset signal and compensates the offset signal based on the noise collected by the sound receiver to provide the signal radiation apparatus.

Description

Noise reduction device {NOISE REDUCING APPARATUS}

The present invention relates to a noise reduction device, and more particularly to a noise reduction device that can reduce the noise generated from the noise source.

In general, a noise barrier having a predetermined height is used to prevent noise generated from a vehicle driving on a road, a train running on a track, and the like being transmitted to a residential area. The noise barrier is continuously installed around a road or track to passively block noise generated from a vehicle or a train so that the noise cannot be transmitted to a residential area.

However, in the case of such a sound barrier, there is a problem that the effect is good for high frequency noise, but the effect is relatively low for low frequency noise.

Accordingly, the technical problem of the present invention has been made in view of this point, the object of the present invention is to provide a noise reduction device that can effectively reduce the noise.

Noise reduction device according to an embodiment of the present invention includes a sound barrier, a signal radiation device, a first sound absorbing device and a signal processing device. The soundproof wall is disposed adjacent to the movement path of the noise source, and includes a soundproof surface facing the movement path of the noise source and a rear surface opposite to the soundproof surface. The signal scavenger is positioned above the rear surface and radiates an offset signal for canceling the noise traveling over the soundproof wall among the noise generated by the noise source. The first sound absorbing device is located above the rear surface, and collects noises that are not extinguished by the cancellation signal among the noises traveling over the soundproof wall. The signal processing apparatus generates the cancellation signal, compensates the cancellation signal based on the noise collected by the first sound receiver, and provides the cancellation signal. The noise reduction device may further include a second sound absorption device located between the soundproof surface and the movement path of the noise source, and collecting and providing the noise generated from the noise source to the signal processing device.

In one embodiment of the present invention, the sound insulation wall may include a base portion and a bent portion. The base portion may have a predetermined width along the movement path of the noise source, and may extend at a predetermined height in the upward direction from the ground. The bent portion may extend inclined from the upper end of the base portion to the base portion. The base portion and the bent portion may be hinged.

The noise reduction device according to another embodiment of the present invention includes a first soundproof wall, a second soundproof wall, a connection member, a fixing member, a signal radiation device, a first sound absorption device, a second sound absorption device, and a signal processing device. The first soundproof wall includes a first base portion extending to have a first height from a first point adjacent to a moving path of the noise source and a first bent portion bent in a direction of the moving path of the noise source from an upper end of the first base portion. . The second soundproof wall is bent in a direction of the movement path from a second base portion extending to have the first height from the second point facing the first point with the movement path therebetween and from an upper end of the second base portion. And a second bent portion. The connection member is positioned above the movement path and connects an end portion of the first bent portion and an end portion of the second bent portion facing each other. The fixing member is positioned above the movement path, is coupled to the connection member, and has a first surface facing the movement path and a second surface opposite to the first surface. The signal radiator is coupled to the first surface of the fixing member and radiates an offset signal for canceling the noise generated by the noise source. The first sound absorbing device is coupled to at least one of the first and second base parts, and collects noise generated from the noise source. The second sound absorbing device is positioned above the first surface of the fixing member and collects noise that is not extinguished by the cancellation signal. The signal processing device generates the cancel signal based on the noise collected by the first sound absorbing device, and compensates the cancel signal based on the noise collected by the second sound absorbing device. to provide.

Noise reduction device according to another embodiment of the present invention includes a sound barrier, a first speaker, a second speaker, a first microphone, a second microphone and a signal processing device. The soundproof wall is disposed adjacent to the movement path of the noise source, and includes a soundproof surface facing the movement path of the noise source and a rear surface opposite to the soundproof surface. The first speaker is disposed above the soundproof surface and radiates a first cancellation signal for canceling the noise generated from the noise source in the direction of the movement path. The second speaker is positioned above the rear surface, and emits a second cancellation signal for canceling the noise traveling over the soundproof wall among the noise generated by the noise source. The first microphone is coupled to the sound insulation surface and collects noise generated from the noise source. The second microphone is positioned above the second speaker and collects noise that travels over the sound barrier. The signal processor includes a first signal processor and a second signal processor. The first signal processor generates the first cancel signal based on the noise collected by the first microphone, and provides the first cancel signal to the first speaker. The second signal processor generates the second cancel signal based on the noise collected by the second microphone and provides the second cancel signal to the second speaker.

The noise reduction apparatus according to the present invention may further reduce noise transmitted from the noise source to the residence by additionally collecting the noise not canceled by the offset signal and compensating the offset signal based on the collected noise.

1 is a cross-sectional view for explaining a noise reduction device according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view illustrating the sound barrier shown in FIG. 1.
3 is a plan view for explaining an example of the positional relationship between the signal radiating device and the first sound receiving device shown in FIG.
FIG. 4A is a plan view illustrating another example of the arrangement relationship between the signal radiating device and the first sound receiver shown in FIG. 1, and FIG. 4B illustrates the coupling relationship between the signal radiating device and the first sound receiver shown in FIG. 4A. 4C is a plan view for explaining a coupling relationship between the signal radiator and the first sound receiver shown in FIG. 4A.
FIG. 5 is a plan view illustrating a base part of the soundproof wall shown in FIG. 1 and a second sound absorbing device coupled thereto.
FIG. 6 is a block diagram illustrating the noise reduction apparatus illustrated in FIG. 1.
7 is a cross-sectional view for describing a noise reduction device according to a second exemplary embodiment of the present invention.
8 is a cross-sectional view for describing a noise reduction device according to a third exemplary embodiment of the present invention.
9 is a plan view of the noise reduction apparatus illustrated in FIG. 8.
FIG. 10A is a plan view illustrating an example of a positional relationship between a signal radiating device coupled to the fixing member shown in FIG. 8 and a first sound receiving device, and FIG. 10B is a signal radiating device coupled to the fixing member shown in FIG. 8; It is a top view for demonstrating another example of the positional relationship of a 1st sound receiver.
11 is a cross-sectional view for describing a noise reduction device according to a fourth exemplary embodiment of the present invention.
FIG. 12 is a block diagram illustrating the noise reduction device illustrated in FIG. 11.

Hereinafter, a jig for manufacturing a light emitting diode module according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Example 1

1 is a cross-sectional view for explaining a noise reduction device according to a first embodiment of the present invention, Figure 2 is a cross-sectional view for explaining the soundproof wall shown in Figure 1, Figure 3 is a signal radiation device and a third It is a top view for demonstrating an example of the positional relationship of 1 receiver. 4A is a plan view illustrating another example of the arrangement relationship between the signal radiating device and the first sound receiver shown in FIG. 1, and FIG. 4B illustrates the coupling relationship between the signal radiating device and the first sound receiver shown in FIG. 4A. 4C is a plan view for explaining a coupling relationship between the signal radiator and the first sound receiver shown in FIG. 4A. FIG. 5 is a plan view illustrating a base portion of the soundproof wall illustrated in FIG. 1 and a second sound absorbing apparatus coupled thereto, and FIG. 6 is a block diagram illustrating the noise reduction apparatus illustrated in FIG. 1.

Referring to FIG. 1, the noise reduction device includes a soundproof wall 100, a signal radiation device 200, a first sound absorbing device 300, a second sound absorbing device 400, and a signal processing device 500. The soundproof wall 100 passively blocks the noise so that the noise generated from the noise source 10 is not transmitted to the residential area APT, the first and second sound absorbing devices 300 and 400, the signal processing device 200, and The signal processing apparatus 500 actively dissipates the noise. For example, the signal processing apparatus 500 generates an offset signal based on the noise collected by the first and second sound receivers 300 and 400, and the signal radiator 200 emits the offset signal. The cancel signal is a signal having the same frequency and magnitude as the noise signal, but of opposite phase. Therefore, when the cancel signal and the noise signal meets, the interference of the signal occurs, the noise is actively removed.

1, 2, and 5, the soundproof wall 100 is disposed adjacent to the movement path of the noise source 10. In detail, the soundproof wall 100 includes a base part 110 and a bent part 130. Each of the base part 110 and the bent part 130 has sound insulation surfaces 110a and 130a facing the movement path of the noise source 10 and rear surfaces 110b and 130b opposite to the sound insulation surfaces 110a and 130a. .

The base unit 110 has a length extending along the movement path of the noise source 10, and extends from the ground to the top by a predetermined height. For example, the base unit 110 may include a plurality of sound insulation plates 113 inserted between the plurality of support frames 111 and the plurality of support frames 111 spaced apart by a predetermined interval along the movement path of the noise source 10. ) May be included. The soundproof plate 113 is preferably formed of a sound absorbing material. A plurality of divided sound insulation boards 113 may be inserted between adjacent support frames 111, but it is preferable that a single sound insulation board 113 which is integrally integral with each other is inserted in view of maintenance and management. In addition, the soundproof plate 113 is preferably formed of a transparent material in order to prevent the appearance of the city by being hindered by the soundproof wall 100 and to secure sunshine. For example, the sound insulation board 113 may be formed of transparent acrylic, glass, or the like.

The bent portion 130 extends obliquely to the base portion 110 from the upper end of the base portion 110. The propagation characteristics of the noise generated from the noise source 10 vary depending on the environment or height such as temperature. Therefore, it is necessary to adjust the inclination angle θ of the bent portion 130 with respect to the base portion 110 in accordance with the propagation characteristics of the noise. To this end, the base portion 110 and the bent portion 130 is preferably a hinge (hinge) coupling. When the base part 110 and the bent part 130 are hinged, the bent part 130 is rotatable with respect to the base part 110, so that the bent part 130 is provided with respect to the base part 110. The angle of inclination θ can be adjusted.

The signal radiation device 200 is positioned on the rear surfaces 110b and 130b of the soundproof wall 100, and radiates an offset signal for canceling the noise traveling over the soundproof wall 100 among the noise generated by the noise source 10. . That is, the signal radiator 200 emits the offset signal in the direction of the residential area (APT) rather than radiating the offset signal in the direction of the movement path of the noise source 10.

The first sound absorbing device 300 is located above the rear surfaces 110b and 130b of the soundproof wall 100 and is not extinguished by the offset signal emitted by the signal radiation device 200 during the noise traveling over the soundproof wall 100. Collect the noise.

In one embodiment of the present invention, as shown in Figure 3, the signal radiation device 200 is coupled to the back surface 130b of the bent portion 130, a plurality of speakers spaced apart from each other by a predetermined interval 200 may be provided. The first sound absorbing device 300 may include a plurality of error microphones 300 coupled to the rear surface 130b of the bent portion 130 and disposed between the plurality of speakers 200, respectively. . The error microphones 300 convert the noise not canceled by the cancel signal emitted by the plurality of speakers 200 into the electrical signal and collect the noise.

In another embodiment of the present invention, as shown in FIG. 4A, the signal radiator 200 is coupled to the rear surface 130b of the bent portion 130 and is arranged to be spaced apart from each other by a predetermined distance. ), And the first sound receiver 300 may include a plurality of error microphones 310 respectively disposed on the plurality of speakers 200. Specifically, as shown in FIGS. 4B and 4C, the first sound absorbing device 300 is coupled to a plurality of tripods 330 and tripods 330, respectively, which are coupled to the front of the plurality of speakers 200, respectively. May include multiple error microphones 310. As such, when each error microphone 310 is positioned directly above the corresponding speaker 200, noise that is not canceled by the cancellation signal can be accurately collected.

1 and 5, the second sound absorbing device 400 is located between the soundproof surface 110a of the base 110 and the movement path of the noise source 10, and collects noise generated from the noise source 10. do. In detail, the second sound absorbing device 400 may include a fixed support 430 and a plurality of sensing microphones 430. The fixed supporter 430 may be coupled to the soundproof surface 110a of the base unit 110 and may have a shape that extends along the movement path of the noise source 10. For example, the fixing support 430 may be coupled to the soundproof surface 110a of the base 110 to be fixed at a height of about 1 m from the ground. The sensing microphones 410 are coupled to the fixed support 430 to face the movement path of the noise source 10. For example, the sensing microphones 410 are preferably arranged in a line so as to be spaced apart from each other by a predetermined interval.

Referring to Figure 6 describes the operation of the noise reduction device according to the first embodiment of the present invention to actively extinguish the noise generated by the noise source 10.

First, the second sound absorbing device 400 coupled to the sound insulation surfaces 110a and 130a of the soundproof wall 100 first collects the noise generated by the noise source 10, converts the noise into an electrical signal, and then processes the signal. Send to 500.

The signal processing apparatus 500 extracts a noise signal of a specific frequency band, for example, an audible frequency band that can be detected by a human, from the received noise signal, and generates an offset signal corresponding to the extracted noise signal. To 200.

The signal radiating device 200 coupled to the rear surfaces 110b and 130b of the soundproof wall 100 amplifies the offset signal provided by the signal processing device 500 and radiates it toward the outside, that is, the residential (APT) direction. Some of the noise generated by the noise source 10 is blocked by the soundproof wall 100, but some passes through the soundproof wall 100 or passes over the soundproof wall 100 by diffraction. In this way, when the noise traveling over the soundproof wall 100 meets the offset signal radiated by the signal radiation device 200, some of it disappears but some of it does not disappear but constructively interferes with the offset signal to generate new noise or cancel the signal. Remains in spite of interference with.

The first sound absorbing device 300 coupled to the rear surfaces 110b and 130b of the soundproof wall 100 collects the remaining or newly generated noise without being extinguished, converts the noise into an electrical signal, and transmits it to the signal processing device 500. do. The signal processing apparatus 500 generating an offset signal based on the noise signal transmitted from the second sound receiver 400 compensates for the offset signal using the noise signal transmitted from the first sound receiver 300, The compensated cancel signal is provided to the signal radiator 200. Since the signal radiator 200 radiates the compensated offset signal provided from the signal radiator 500, the signal radiator 200 may more efficiently remove the noise transmitted to the residential area APT beyond the soundproof wall 100.

Example 2

7 is a cross-sectional view for describing a noise reduction device according to a second exemplary embodiment of the present invention. The noise reduction device according to the second embodiment of the present invention is substantially the same as the noise reduction device according to the first embodiment of the present invention described with reference to FIGS. 1 to 6 except for the position of the signal radiation device and the position of the second sound receiver. Has the same configuration. Therefore, redundant descriptions are omitted, and the following description mainly focuses on the configuration distinguished from the first embodiment of the present invention.

Referring to FIG. 7, the noise reduction device includes a soundproof wall 100, a signal radiation device 200, a first sound absorbing device 300, a second sound absorbing device 400, and a signal processing device 500.

In the present exemplary embodiment, the soundproof wall 100 may include a base portion 110 and a bent portion 130, and the soundproof surface of the bent portion 130 may be a curved surface having a predetermined curvature as shown in FIG. 7. .

The signal radiation device 200 is coupled to the rear surface of the base portion 110 of the soundproof wall 100. For example, the signal radiator 200 may include a plurality of speakers 200 coupled to the rear surface of the base 110 and spaced apart from each other by a predetermined interval. The speakers 200 are preferably disposed adjacent to a boundary portion between the base 110 and the bent 130.

The second sound absorbing device 400 includes a plurality of support microphones 430 and a plurality of sensing microphones respectively coupled to ends of the support rods 430 protruding from the sound insulation surface near the boundary between the base portion 110 and the bent portion 130. 410 may be included. Since some of the noise generated from the noise source 10 is reflected by the soundproof surface of the soundproof wall 100, if the sensing microphone 410 is positioned at the center of curvature of the bend 130, the noise generated by the noise source 10 may be better. It can be detected efficiently. Accordingly, each of the supporting rods 430 preferably protrudes from the sound insulation surface to the extent that the sensing microphone 410 can be located at the center of curvature of the bend 130 sound insulation surface.

Example 3

8 is a cross-sectional view for describing a noise reduction device according to a third exemplary embodiment of the present invention, and FIG. 9 is a plan view of the noise reduction device shown in FIG. 8. FIG. 10A is a plan view illustrating an example of a positional relationship between a signal radiating device coupled to the fixing member shown in FIG. 8 and a first sound receiving device, and FIG. 10B is a signal radiating device coupled to the fixing member shown in FIG. 8; It is a top view for demonstrating another example of the positional relationship of a 1st sound receiver.

8 and 9, the noise reduction apparatus according to Embodiment 3 of the present invention may include a first soundproof wall 1100, a second soundproof wall 1200, a connection member 1300, a fixing member 1400, and a signal radiation device. 200, a first receiver 300, a second receiver 400, and a signal processor (not shown).

The first soundproof wall 1100 includes a first base portion 1110 and a first bent portion 1130. The first base portion 1110 extends to have a first height from a first point adjacent to the movement path of the noise source 10. Since the detailed configuration of the first base portion 1110 is substantially the same as the base portion of the noise reduction apparatus according to the first embodiment of the present invention described with reference to FIG. 5, a detailed description thereof will be omitted. The first bent part 1130 is bent from the upper end of the first base part 1110 in the direction of the movement path of the noise source 10. An end portion of the first bent portion 1130 may be positioned above the movement path of the noise source 10. In contrast, the first bent part 1130 may not overlap the movement path of the noise source 10.

Since the second soundproof wall 1200 has a symmetrical configuration with the first soundproof wall 1100 based on the movement path of the noise source 10, a detailed description of the second soundproof wall 1200 may be described with reference to the first soundproof wall 1100. Replace with description.

The connection member 1300 is positioned above the movement path and connects an end portion of the first bent portion 1130 and an end portion of the second bent portion 1230 facing each other. The connecting member 1300 shown in FIG. 9 is disposed in parallel to each other and both ends thereof are illustrated as a plurality of connecting rods coupled to the first bent portion 1130 and the second bent portion 1230, respectively. 1300 may be implemented as a single transparent plate.

The fixing member 1400 is coupled to the connection member. Specifically, the fixing member 1400 extends along the movement path of the noise source 10 at the upper portion of the movement path of the noise source 10. The fixing member 1400 has a first surface 1400a facing the movement path of the noise source 10 and a second surface 1400b opposite thereto.

The signal radiator 200 is coupled to the first surface 1400a of the fixing member 1400 and radiates an offset signal for canceling the noise generated by the noise source 10 in the direction of the movement of the noise source 10. . The signal radiator 200 may include a plurality of speakers 200 coupled to the first surface 1400a of the fixing member 1400 and arranged in a line along the longitudinal direction of the fixing member 1400. The plurality of speakers 200 are spaced apart from each other by a predetermined interval.

The first sound absorbing device 300 is positioned above the first surface 1400a of the fixing member 1400 and is not extinguished by the offset signal emitted by the signal radiating device 200 among the noise generated from the noise source 10. Collect the noise. In one embodiment of the present invention, the first sound absorbing device 300 is coupled to a plurality of tripods 330 and a plurality of tripods 330 respectively coupled to the front of the speakers 200 as shown in Figure 10a It may include multiple error microphones 310. Alternatively, in another embodiment of the present invention, the first sound absorbing device 300 is directly coupled to the first surface 1400a of the fixing member 1400, as shown in FIG. 10B, between the speakers 200. It may include a plurality of error microphones 310 each disposed.

The second sound absorbing device 400 is coupled to at least one of the first base part 1110 of the first soundproof wall 1100 and the second base part 1210 of the second soundproof wall 1200. For example, the second sound absorbing device 400 is coupled to the soundproof surface of the first base portion 1110, and includes a plurality of first sensing microphones 400 arranged in a line along a moving path of the noise source 10 and And / or a plurality of second sensing microphones 400 coupled to the sound insulation surface of the second base portion 1210 and arranged in a line along the movement path of the noise source 10. The first sensing microphones 400 mainly collect the noise generated from the noise sources 10 moving along the one-way lane, and the second sensing microphones 400 move the noise sources 10 along the opposite lane. It mainly collects the noise from the system.

The signal processing device generates an offset signal based on the noise collected by the second sound absorbing device 400, and compensates the offset signal based on the noise collected by the second sound absorbing device 400. To provide.

The operation of the noise reduction device according to the third embodiment of the present invention to actively dissipate the noise generated by the noise source 10 is substantially the same as the operation of the noise reduction device according to the first embodiment of the present invention described with reference to FIG. 6. Since the same, specific description thereof will be omitted.

Example 4

11 is a cross-sectional view for describing a noise reduction device according to a fourth exemplary embodiment of the present invention.

Referring to FIG. 11, the noise reduction device according to the fourth embodiment of the present invention includes a soundproof wall 100, a first signal radiation device, a second signal radiation device, a first sound absorption device 300, and a second sound absorption device 400. And a signal processing apparatus 500.

  The soundproof wall 100 is disposed adjacent to the movement path of the noise source 10. The soundproof wall 100 of the noise reduction device according to the fourth embodiment of the present invention is substantially the same as the soundproof wall 100 of the noise reduction device according to the first embodiment of the present invention described with reference to FIGS. 1, 2, and 5. Since there is, a detailed description thereof will be omitted.

The first signal radiator 2200 is positioned above the soundproof surface of the soundproof wall 100 and radiates a first cancellation signal for canceling the noise generated from the noise source 10 in the direction of the movement path of the noise source 10. In detail, the first signal radiator 2200 is coupled to the sound insulation surface of the base unit 110 of the soundproof wall 100, and includes a plurality of first speakers 2200 arranged in a line along a movement path of the noise source 10. ) May be included. The first speakers 2200 may be disposed adjacent to the upper end of the base unit 110. In contrast, the first signal radiator 2200 may include a plurality of first speakers coupled to the sound insulation surface of the bent portion 130 of the soundproof wall 100 and arranged in a line along the movement path of the noise source 10. It may be.

The second signal radiating device 2100 is positioned on the rear surface of the soundproof wall 100 and radiates a second canceling signal for canceling the noise traveling over the soundproof wall 100 among the noise generated by the noise source 10. Since the second signal radiator 2100 is positioned above the rear surface of the soundproof wall 100, the second signal radiator 2100 radiates the second offset signal toward the residential APT direction. The second signal radiator 2100 is coupled to the rear surface of the bent portion 130 of the soundproof wall 100 and may include a plurality of second speakers 2100 arranged in a line along the movement path of the noise source 10. Can be. Alternatively, the second signal radiator 2100 may include a plurality of second speakers coupled to the rear surface of the base portion 110 of the soundproof wall 100 and arranged in a line along the movement path of the noise source 10. have.

The first sound absorbing device 300 is coupled to the soundproof surface of the soundproof wall 100 and collects the noise generated from the noise source 10. For example, the first sound absorbing device 400 is coupled to the soundproof surface of the base portion 110 of the soundproof wall 100, is disposed below the first speakers 2200, and follows the movement path of the noise source 10. It may include a plurality of sense microphones 400 arranged in a line.

The second sound absorbing device 300 is located on the rear surface of the soundproof wall 100 and collects the noise that proceeds beyond the soundproof wall 100. In one embodiment of the present invention, the second sound absorbing device 300 is a plurality of tripod 330 and a plurality of error microphones coupled to each of the plurality of tripods 330 respectively coupled to the front of the second speakers 2100 It may include the (310). Alternatively, in another embodiment of the present invention, the second receiver 300 may include a plurality of error microphones disposed between the second speakers 2100.

The signal processor 500 may generate a first cancellation signal based on the noise collected by the first sound receiver 400, and provide the first signal processor 510 and the second sound receiver to the first speaker 2200. The second signal processor 530 may generate a second cancellation signal based on the noise collected by the 300 and provide the second cancel signal to the second speaker 2100.

FIG. 12 is a block diagram illustrating the noise reduction device illustrated in FIG. 11.

With reference to FIG. 12, the operation of the noise reduction device according to the fourth embodiment of the present invention to actively dissipate the noise generated by the noise source 10 will be described.

First, the first sound absorbing device 400 coupled to the sound insulation surface of the base unit 110 of the soundproof wall 100 collects the noise generated from the noise source 10, converts it into an electrical signal, and converts the converted noise signal into a signal processing. The signal is transmitted to the first signal processor 510 of the apparatus 500. The first signal processor 510 extracts a noise signal of a specific frequency band, for example, an audible frequency band that can be detected by a human, from among the noise signals received from the first sound receiver 400, and then corresponds to the extracted noise signal. One cancel signal is generated and provided to the first signal radiator 2200.

The first signal radiating device 2200 coupled to the soundproof surface of the soundproof wall 100 amplifies the first cancellation signal provided from the first signal processing unit 510 and radiates in the direction of the movement path of the noise source 10. That is, the noise generated from the noise source 10 is primarily canceled by using the first cancellation signal radiated by the first signal radiator 2200.

Some of the noise generated from the noise source 10 is canceled by the first cancellation signal, some are absorbed or blocked by the soundproof wall 100, and some of the noises travel beyond the soundproof wall 100 in the direction of the residential APT.

The second sound absorbing device 300 disposed on the rear surface of the soundproof wall 100 collects the noise traveling in the direction beyond the soundproof wall 100 toward the residential area APT among the noise generated from the noise source 10 and converts it into an electrical signal. Then, the converted electrical signal is transmitted to the second signal processor 530 of the signal processing apparatus 500. The second signal processor 530 extracts a noise signal of a specific frequency band, for example, an audible frequency band that can be detected by a human, from among the noise signals received from the second sound receiver 300, and then corresponds to the extracted noise signal. A second cancellation signal is generated and provided to the second signal radiator 2100.

The second signal radiating device 2100 coupled to the rear surface of the soundproof wall 100 amplifies the second offset signal provided from the second signal processing unit 530 and radiates it toward the residential area APT. The second canceling signal radiated from the second signal radiator 2100 cancels the noise traveling in the direction of the residential area APT beyond the soundproof wall 100.

As described above, according to the noise removing device according to the present invention, the noise generated from the noise source can be effectively reduced because the cancel signal cancels the noise traveling in the direction of the residential area beyond the soundproof wall.

In addition, according to the noise removing device according to the present invention, by adjusting the angle formed by the bent portion of the soundproof wall with respect to the base portion of the soundproof wall, it is possible to remove the noise more efficiently.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. It can be understood that it is possible.

10: noise source 100: soundproof wall
200: signal radiation device 300: first sound receiving device
400: second receiving apparatus 500: signal processing apparatus

Claims (10)

delete delete delete delete delete delete A first soundproof wall including a first base portion extending to a predetermined height from a first point adjacent to a moving path of the noise source and a first bent portion bent in a direction of the moving path of the noise source from an upper end of the first base portion;
A second base portion extending to a predetermined height from a second point facing the first point with the moving path therebetween, and a second bent portion bent in the moving path direction from an upper end of the second base part. 2 soundproof walls;
A connection member positioned above the movement path and connecting an end portion of the first bent portion and an end portion of the second bent portion facing each other;
A fixing member positioned above the movement path and coupled to the connection member and having a first surface facing the movement path and a second surface opposite to the first surface;
A signal radiating device coupled to the first surface of the fixing member and radiating an offset signal for canceling the noise generated by the noise source;
A first sound absorbing device coupled to at least one of the first and second base parts and collecting noise generated from the noise source;
A second sound absorbing device positioned above the first surface of the fixing member and collecting noise that is not extinguished by the cancellation signal; And
The signal processing device generates the cancel signal based on the noise collected by the first sound receiver, and compensates the cancel signal based on the noise collected by the second receiver. Noise reduction device comprising a. The apparatus of claim 7, wherein the signal shunt includes a plurality of speakers coupled to the first surface of the fixing member and connected to the signal processing apparatus.
The first sound absorbing device includes a plurality of first microphones coupled to at least one of the first and second base portions and arranged along the movement path,
The second sound absorbing device includes a plurality of tripods respectively coupled to the front of the plurality of speakers and a plurality of first microphones respectively coupled to the plurality of tripods. The apparatus of claim 7, wherein the signal emission device comprises a plurality of speakers connected to the signal processing device and coupled to the first surface of the fixing member.
The first sound absorbing device includes a plurality of first microphones coupled to at least one of the first and second base portions and arranged along the movement path,
The second sound absorbing device is disposed between the plurality of speakers, respectively, characterized in that it comprises a plurality of second microphones coupled to the first surface of the fixing member. delete

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