Device for amplifying sound waves

Abstract

The present invention relates to a device for amplifying sound waves, which may include a metamaterial structure having a metamaterial inside the metamaterial structure, an inlet through which air flows into the metamaterial structure, and a penetration portion formed as a part of one side penetrating the metamaterial structure; a membrane member coupled to the penetration portion; and a resonance member surrounding the membrane member and coupled to the metamaterial structure, the resonance member including a space inside the metamaterial structure and an exhaust port, the exhaust port being fluidly connected to the outside and the inside space.

Description

Technical Field

[0001] The present invention relates to a device for amplifying sound waves, and in particular to a device for amplifying sound waves comprising metamaterials. Background Art

[0002] Due to the development of environmental protection technology and the strengthening of environmental laws and regulations around the world, most internal combustion engine vehicles are undergoing engine downsizing. In order to compensate for the reduction in engine power due to this engine size reduction, turbochargers are often applied to sports concept cars.

[0003] With a turbocharger, engine power can be increased, but the natural engine sound may be dampened, which is undesirable especially for sports cars. This is due to the fact that an engine with a turbocharger has a longer sound transmission path than an engine without a turbocharger. Since engine sound is an important feature of sports cars, measures need to be taken to address the current problem.

[0004] As such measures, various technologies have emerged, such as electro-sound generators (ESGs), virtual engine sound systems (VESSs), etc. Existing active sound generators control the tone by using a controller to change the exhaust port of the noise generator according to the engine RPM, vehicle load conditions, etc. Such active sound generators include motors, controllers, flaps, membranes, covers, hoses, connecting clamps, etc., which require a large number of components due to their complex shapes, and result in higher production costs due to the use of motors and controllers. In addition, common active sound generators require additional electricity to operate the motors, thereby increasing the amount of electricity consumed by the vehicle, and require additional cables. In addition, since the virtual sound generated is not the actual engine sound, many drivers are not satisfied with the current virtual sound.

[0005] The information included in this Background section is only intended to enhance understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes the prior art already known to a person of ordinary skill in the art. Summary of the invention

[0006] Various aspects of the present invention are directed to providing a device for amplifying sound waves that can satisfy both natural engine sound and environmentally friendly requirements.

[0007] Various aspects of the present invention are directed to providing a device for amplifying sound waves, which is capable of amplifying actual engine sounds without applying separate electric power.

[0008] It is a further object of the present invention to provide a device for amplifying sound waves which provides a realistic engine sound even in a vehicle having a turbocharger.

[0009] Still another object of the present invention is to provide a device for amplifying sound waves which can reduce the overall cost and the number of components.

[0010] Various aspects of the present invention are directed to providing a device for amplifying sound waves, the device comprising: a metamaterial structure including a metamaterial inside the metamaterial structure, an inlet through which air flows into the metamaterial structure, and a penetration portion formed as a portion penetrating one side of the metamaterial structure; a membrane member coupled to the penetration portion; and a resonance member surrounding the membrane member and coupled to the metamaterial structure, the resonance member including a space and an exhaust port configured to communicate with the outside.

[0011] In various exemplary embodiments of the present invention, the device may further include an airtight seal maintaining airtightness of a periphery of the membrane member.

[0012] In various exemplary embodiments of the present invention, the metamaterial may include a plurality of channels that are repeatedly formed and are in fluid communication with the inlet and the membrane member.

[0013] In various exemplary embodiments of the present invention, each of the channels may be formed in a folded shape.

[0014] In various exemplary embodiments of the present invention, each of the channels may include: a first flow path extending in a direction aligned with the inflow direction of air; a second flow path extending from an end of the first flow path in a leftward direction or a rightward direction relative to the first flow path; a third flow path fluidly connected to the second flow path, the third flow path extending from an end of the second flow path in an extension direction of the first flow path and parallel to the first flow path; and a fourth flow path fluidly connected to the third flow path, the fourth flow path extending from an end of the third flow path in an extension direction of the first flow path and parallel to the second flow path.

[0015] In various exemplary embodiments of the present invention, a section having a hollow space may be formed inside the metamaterial structure, and the penetration portion corresponds to the section.

[0016] In various exemplary embodiments of the present invention, the metamaterial may include a plurality of channels formed repeatedly, and air flowing into the metamaterial structure through the inlet may sequentially pass through the channels and the segments and flow into the resonance member via the membrane member.

[0017] In various exemplary embodiments of the present invention, the metamaterial structure may further include: a first shell accommodating the metamaterial therein; and a second shell hermetically coupled to the first shell and provided with the penetration portion.

[0018] In various exemplary embodiments of the present invention, the first shell may include a partitioning member protruding from a portion of the periphery of the first shell, the second shell may include a protrusion protruding from one side of the second shell and connected to the partitioning member, and the entrance is defined by a space formed by connecting the partitioning member and the protrusion to each other.

[0019] In various exemplary embodiments of the present invention, a sealing member may be installed around the periphery of the inlet to ensure airtightness.

[0020] In various exemplary embodiments of the present invention, the device may further include: a plurality of through holes passing through the first housing and the second housing; and a fastening member fixedly inserted into the through holes.

[0021] In various exemplary embodiments of the present invention, an insert protrudes from a surface of the second housing and is spaced apart from a periphery of the penetration portion by a certain distance, and the resonance member may be closely coupled to the insert.

[0022] Other aspects and exemplary embodiments of the invention are discussed below.

[0023] The above and other features of the invention are discussed below.

[0024] The methods and apparatus of the present invention have other features and advantages that will be apparent from, or will be described in detail in, the accompanying drawings and subsequent embodiments incorporated herein, which together serve to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a perspective view exemplarily illustrating an apparatus for amplifying sound waves according to various exemplary embodiments of the present invention.

[0026] Figure 2 is an exploded perspective view of an apparatus for amplifying sound waves according to various exemplary embodiments of the present invention, in which an intake system installation side of the apparatus is omitted.

[0027] Figure 3 for Figure 1 Exploded three-dimensional diagram.

[0028] Figure 4is a partially enlarged view of a second housing of the device for amplifying sound waves according to various exemplary embodiments of the present invention.

[0029] Figure 5 is a perspective view exemplarily illustrating a film member of an apparatus for amplifying sound waves according to various exemplary embodiments of the present invention.

[0030] Fig. 6A is a perspective view of an apparatus for amplifying sound waves according to various exemplary embodiments of the present invention.

[0031] Figure 6B It is along Fig. 6A A cross-sectional view taken along line AA'.

[0032] Fig. 7A 2 is a diagram exemplarily illustrating a state in which an apparatus for amplifying sound waves according to various exemplary embodiments of the present invention is mounted on an intake system.

[0033] Figure 7B is a view exemplarily illustrating an apparatus for amplifying sound waves according to various exemplary embodiments of the present invention, which shows Fig. 7A The state seen in the Z direction.

[0034] Figure 8 For along Fig. 7A Cross-sectional view obtained along line BB'.

[0035] Fig. 9 and Fig.10 2 is a graph showing the amplification effect of the apparatus for amplifying sound waves according to various exemplary embodiments of the present invention.

[0036] It should be understood that the drawings are not necessarily drawn to scale, but rather present simplified representations of various schematic features to illustrate the basic principles of the present invention. The specific design features (including, for example, specific dimensions, directions, locations, and shapes) included in the present invention will be determined in part by the specific intended application and use environment.

[0037] In the figures, like reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing. DETAILED DESCRIPTION

[0038] The following will be referred to in detail various embodiments of the present invention, examples of which are presented in the accompanying drawings and described below. Although the present invention will be described in conjunction with the exemplary embodiments of the present invention, it should be appreciated that this specification is not intended to limit the present invention to those exemplary embodiments. On the other hand, the present invention is intended to cover not only the exemplary embodiments of the present invention, but also various alternative forms, modified forms, equivalent forms and other embodiments that may be included in the spirit and scope of the present invention as defined by the appended claims.

[0039] In the following description of the embodiment, terms such as "first" and "second" may be used to describe various elements, but do not limit these elements. These terms are only used to distinguish one element from another element. For example, without departing from the scope and spirit of the present invention, a first element may be referred to as a second element, and similarly a second element may also be referred to as a first element.

[0040] When an element or layer is referred to as being "on," "engaged with," "connected to," or "coupled to" another element or layer, it may be directly on, engaged, connected, or coupled to, or there may be intervening elements or layers. Conversely, when an element is referred to as being "directly on," "directly engaged with," "directly connected to," or "directly coupled to" another element or layer, there may be no intervening elements or layers. Other words used to describe the relationship between elements, such as "between" versus "directly between," "adjacent" versus "directly adjacent," etc., may be interpreted in a similar manner.

[0041] In the following description of the embodiment, even in different drawings, the same elements are represented by the same reference numerals. The terms used in the present invention are only used to describe specific embodiments and are not intended to limit them. In the following description of the embodiment, singular expressions may include plural expressions unless they have significantly different contextual meanings. In the following description of the embodiment, terms such as "comprising", "including", "having" will be interpreted as indicating the presence of features, values, steps, operations, elements or parts or combinations thereof stated in the specification, and do not exclude the possibility of the presence or addition of one or more other features, values, steps, operations, elements, parts or combinations thereof.

[0042] An apparatus for amplifying sound waves according to various exemplary embodiments of the present invention includes a metamaterial structure including a metamaterial inside the metamaterial structure, an inlet through which air flows into the metamaterial structure, and a penetration portion formed in a portion of one side of the metamaterial structure, the apparatus for amplifying sound waves also includes a membrane member and a resonance member, the membrane member is coupled to the penetration portion, the resonance member surrounds the membrane member and is coupled to the metamaterial structure, and the resonance member includes a space inside the metamaterial structure and an exhaust port, the exhaust port being fluidly connected to the outside and the inside space.

[0043] The apparatus for amplifying sound waves according to various exemplary embodiments of the present invention has excellent sound wave amplification performance.

[0044] The apparatus for amplifying sound waves according to various exemplary embodiments of the present invention may amplify and transmit actual engine sounds instead of virtual engine sounds.

[0045] The apparatus for amplifying sound waves according to various exemplary embodiments of the present invention can reduce overall cost and the number of components and has a simple structure.

[0046] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0047] Figure 1 is a perspective view exemplarily showing an apparatus 1 for amplifying sound waves according to various exemplary embodiments of the present invention, Figure 2 The device 1 for amplifying sound waves is in a state where some components of the intake system installation side are omitted. Figure 1 Exploded three-dimensional diagram.

[0048] like Figure 1 and Figure 2 As shown, a device 1 for amplifying sound waves according to an exemplary embodiment of the present invention includes a metamaterial structure 2 , a membrane member 4 , and a resonance member 6 .

[0049] The metamaterial structure 2 includes a metamaterial M inside, and the metamaterial M amplifies sound waves in the metamaterial structure 2. The metamaterial M is any material designed to have properties that do not exist in natural materials. The metamaterial M is made of an assembly of multiple elements, which are made of composite materials such as metal and plastic, and are usually installed repeatedly.

[0050] In order to physically reduce the propagation speed of sound waves and concentrate the sound pressure inside a small space, acoustic properties of high refractive index and high impedance are required. However, in most natural materials, the speed of sound waves increases with the increase of material density. Therefore, these materials cannot achieve high refractive index and high impedance at the same time. The metamaterial M according to various exemplary embodiments of the present invention has a folded structure that can reduce the speed of sound waves in the medium, so that the metamaterial obtains high refractive index characteristics. Moreover, the metamaterial M provides high impedance characteristics, in which the sound pressure is increased by the generation of resonance at a specific frequency. Therefore, the metamaterial has characteristics that cannot be found in nature. Here, various principles can be used to generate resonance. For example, the principle of a Helmholtz resonator can be used to generate resonance in the same way as a conventional resonator, or a Fabry-Perot resonance that generates resonance by overlapping the reflected wave and the transmitted wave of the sound wave between two media can be used.

[0051] Although the metamaterial M according to various exemplary embodiments of the present invention is not limited to a specific shape, the metamaterial M has a repeated pattern. Regardless of the shape of the metamaterial M, a plurality of channels 100 or segments 112 directed toward the penetration portion 122 may be formed. Each of the plurality of channels 100 is configured to be in fluid communication with the inlet 32 ​​and the membrane member 4.

[0052] According to an embodiment of the present invention, each channel 100 is formed in a folded shape. According to an embodiment of the present invention, each channel 100 may include a first flow path 110, a second flow path 120, a third flow path 130, and a fourth flow path 140. In addition, each channel 100 may include a plurality of first flow paths 110, second flow paths 120, third flow paths 130, and fourth flow paths 140 that are repeatedly arranged.

[0053] According to an embodiment of the present invention, the first flow path to the fourth flow path 110, 120, 130 and 140 are formed to be connected to each other. The first flow path 110 extends in a direction aligned with the inflow direction of the air. That is, the first flow path 110 extends in a direction consistent with the direction of the air flowing into the metamaterial M in the metamaterial structure 2. The second flow path 120 extends from the first flow path 110 in a left direction or a right direction relative to the first flow path 110. That is, the second flow path 120 changes the extension direction of the first flow path 110 and extends in its left direction or right direction. The third flow path 130 is in fluid communication with the second flow path and extends in the same direction as the extension direction of the first flow path parallel to the first flow path 110. The third flow path 130 extends in a direction parallel to the first flow path 110, and the first flow path 110 and the third flow path are spaced apart from each other by about the length of the second flow path 120. The fourth flow path 140 is in fluid communication with the third flow path 130 and extends parallel to the second flow path 120 in a direction toward the first flow path 110. That is, the fourth flow path 140 extends parallel to the second flow path 120 and is spaced apart from the second flow path 120 by approximately the length of the third flow path 130.

[0054] Figure 3 is based on Figure 1 Schematic diagram of an exploded perspective view of a device for amplifying sound waves according to various exemplary embodiments of the present invention.

[0055] like Figure 3 As shown, the metamaterial structure 2 includes a housing unit, and the metamaterial M is accommodated in the housing unit. The housing unit is configured as a housing for the metamaterial M, and is configured to maintain the airtightness of the interior of the housing unit except for the penetrating portion 122 for emitting sound waves. The housing unit may include a first housing 12, a second housing 22, and an inlet 32. Although the housing unit according to the exemplary embodiment of the present invention is referred to as including two housings, i.e., the first housing 12 and the second housing 22, which are respectively provided, the first housing 12 and the second housing 22 may also be integrally formed as a single unit.

[0056] The airtightness between the first housing 12 and the second housing 22 is maintained in the area except for the inlet 32 ​​and the penetration portion 122 which are configured to allow air to flow thereinto.

[0057] The first housing 12 contains the metamaterial M therein. A section 112 in which an empty region without the metamaterial M is provided may be formed in the first housing 12 .

[0058] The partitioning member 212 protrudes from the periphery of the first housing 12. According to an embodiment of the present invention, the partitioning member 212 is formed as a part of the periphery of the first housing 12.

[0059] The second housing 22 is coupled to the first housing 12. The coupling portion between the first housing 12 and the second housing 22 is kept airtight. To this end, the first housing 12 and the second housing 22 may be configured to maintain airtightness therebetween by welding. In addition, as described below, airtightness may be enhanced by one or more fastening members 20 attached to the through hole 42. Figure 4 A partial enlarged view exemplarily showing the second housing 22 is depicted.

[0060] See also Figure 4 The penetration portion 122 is formed to penetrate the second housing 22. The penetration portion 122 is in fluid communication with the interior of the first housing 12 and is in fluid communication with the section 112 in the first housing 12.

[0061] The receiving groove 222 may be formed at the periphery of the penetration portion 122. According to an embodiment of the present invention, the receiving groove 222 is recessed from the surface of the second housing 22. In addition, a guide groove 322 may be formed at one side of the penetration portion 122 to guide the insertion of the film member 4. The guide groove 322 may extend outward from the receiving groove 222. In addition, a plurality of coupling protrusions 422 may be formed on the periphery around the penetration portion 122 to guide the insertion of the film member 4.

[0062] According to an embodiment of the present invention, the protrusion 522 protrudes from the surface of the second housing 22 at one side of the second housing 22. The protrusion 522 is coupled to the partition member 212 of the first housing 12, which may define the inlet 32 ​​for air received from the intake system.

[0063] According to various exemplary embodiments of the present invention, the insert 622 protrudes from the surface of the second housing 22. The insert 622 may be spaced apart from the periphery of the penetration portion 122 by a certain distance.

[0064] According to various exemplary embodiments of the present invention, a plurality of through holes 42 are formed through the first housing 12 and the second housing 22. The fastening member 20 may be inserted into the through holes 42, thereby providing additional coupling force to maintain airtightness.

[0065] The periphery of the inlet 32 ​​defined by connecting the first shell 12 and the second shell 22 to each other is kept airtight. All parts of the inlet 32 ​​are kept airtight except for the part connected to the air intake system and the channel of the metamaterial M. According to one embodiment of the present invention, a sealing member 10 is installed on the periphery of the inlet 32 ​​to maintain airtightness. The sealing member 10 installed on the periphery of the inlet 32 ​​defined by the partitioning member 212 and the protrusion 522 ensures airtightness. If airtightness cannot be maintained when the air intake system is connected to the device 1 for amplifying sound waves, problems such as noise may occur. According to various exemplary embodiments of the present invention, airtightness can be ensured by the inlet 32 ​​formed by connecting the first shell 12 and the second shell 22 to each other and the sealing member 10 installed on the inlet 32.

[0066] The device 1 for amplifying sound waves according to various exemplary embodiments of the present invention includes a membrane member 4. The membrane member 4 is designed to transmit the vibration of the metamaterial structure 2 to the resonance member 6 through a thin film. According to an embodiment of the present invention, the membrane member 4 can be accommodated on the penetration portion 122 of the second housing 22 and in the accommodation groove 222 of the second housing 22. The membrane member 4 is sealingly coupled to the penetration portion 122.

[0067] Figure 5 is a stereoscopic view of the membrane component.

[0068] like Figure 5 As shown, according to one embodiment of the present invention, the film member 4 includes a guide protrusion 14 and a coupling groove 24 to ensure a secure connection and guide the connection of the film member 4 with the second housing 22. The guide protrusion 14 can be configured to be accommodated in the guide groove 322 of the second housing 22, and the coupling groove 24 can be configured to engage with the coupling protrusion 422 of the second housing 22.

[0069] The airtight member 8 is installed around the membrane member 4. The airtight member 8 is provided to seal the periphery of the membrane member 4 airtightly.

[0070] According to one embodiment of the present invention, the airtight member 8 can be accommodated in the accommodating groove 222. Preferably, the membrane member 4 is tightly mounted on the airtight member 8 accommodated in the accommodating groove 222 of the second shell 22. When the membrane member 4 is mounted on the part of the one side of the shell unit where the sound wave is amplified, the connecting part between the part of the one side of the shell unit and the membrane member 4 can maintain airtightness. Unless this is the case, the sound wave cannot be amplified by the membrane member 4. According to the present invention, the connecting part between the part of the one side of the shell unit and the membrane member 4 can be airtightly sealed by the airtight member 8. In addition to the airtight member 8, the shell unit and the membrane member 4 can also be formed integrally to improve airtightness.

[0071] As non-limiting examples, the airtight member 8 may be formed of rubber or plastic. The airtight member 8 may be formed of any material configured to ensure airtightness.

[0072] The resonance member 6 is mounted on the second housing 22. The resonance member 6 is mounted on the second housing 22 to sealingly surround the membrane member 4. According to one embodiment of the present invention, the resonance member 6 is sealingly attached to the insert 622 of the second housing 22.

[0073] A space is formed inside the resonance member 6, and an exhaust port 16 communicating with the outside is formed on the resonance member 6. The volume of the resonance member 6 and the diameter and length of the exhaust port 16 can be adjusted to be suitable for the target frequency, so that resonance is generated by the resonance member 6 at the target frequency.

[0074] The device for amplifying sound waves according to various exemplary embodiments of the present invention can be implemented in any of various embodiments other than the above-mentioned embodiments. Therefore, the device for amplifying sound waves demonstrates high versatility and usability. The device for amplifying sound waves according to various exemplary embodiments of the present invention can be applied to any flow path of air flow, such as an air filter, an air hose, an air duct, etc. Moreover, it can be applied as a cylindrical structure, such as Fig. 6A and 6B shown.

[0075] Operations and effects of the apparatus 1 for amplifying sound waves according to various exemplary embodiments of the present invention will be mentioned below.

[0076] Fig. 7A and Figure 7B A state in which the apparatus 1 for amplifying sound waves according to various exemplary embodiments of the present invention is mounted on an intake system is shown. Figure 8 For along Fig. 7A The cross-sectional view obtained by the line BB' in FIG. Figure 8, the device 1 for amplifying sound waves according to various exemplary embodiments of the present invention utilizes the engine sound in the intake system to amplify the sound waves entering the metamaterial structure 2. The sound waves amplified by the metamaterial M passing through the section 112 are guided to the resonance member 6 through the membrane member 4. That is, the membrane member 4 is disposed on a portion of one side of the metamaterial structure 2 to emit the sound waves amplified by the metamaterial structure 2 to the outside. The resonance member 6 is installed to surround the membrane member 4. The resonance member 6 amplifies the sound pressure inside the resonance member 6 through the resonance phenomenon, and discharges the amplified sound to the outside through the exhaust port 16. Compared with the above-mentioned related art, the device 1 for amplifying sound waves according to various exemplary embodiments of the present invention can reduce costs. A plastic injection molding method can be applied to generate the device 1 for amplifying sound waves according to various exemplary embodiments of the present invention, and the device 1 for amplifying sound waves eliminates components that generate high costs, such as motors, controllers, etc., so that cost reduction can be achieved.

[0077] Furthermore, compared to the related art, the apparatus 1 for amplifying sound waves according to various exemplary embodiments of the present invention is greatly simplified due to having a reduced number of components.

[0078] Furthermore, the apparatus 1 for amplifying sound waves according to various exemplary embodiments of the present invention belongs to a non-control system and does not require electric power in operation, as compared to conventional techniques.

[0079] The device 1 for amplifying sound waves according to various exemplary embodiments of the present invention is intended to provide excellent sound amplification performance. Fig. 9 and Fig.10 As shown, it is shown that the sound pressure is amplified by about 30dB at the target frequency 350Hz, and the sound pressure is amplified by about 30dB compared with the reference. The reference is Fig.10 It is denoted as BASE(WALL) in the figure and represents the sound pressure varying with frequency, which is measured by a microphone mounted on the outer wall of the circular tube. Fig.10 META+RESO_350 in FIG. 1 denotes the device 1 for amplifying sound waves according to various exemplary embodiments of the present invention, and represents the sound pressure varying with respect to frequency, which is measured by the device 1 for amplifying sound waves installed on the perforated outer wall of the circular pipe.

[0080] As is apparent from the above description, the apparatus for amplifying sound waves according to various exemplary embodiments of the present invention may satisfy conventional engine sounds and environmental friendliness.

[0081] In addition, the apparatus for amplifying sound waves according to various exemplary embodiments of the present invention may amplify actual engine sound without applying separate electric power.

[0082] Furthermore, the apparatus for amplifying sound waves according to various exemplary embodiments of the present invention is intended to provide a practical engine sound even in a vehicle to which a turbocharger is applied.

[0083] Furthermore, the apparatus for amplifying sound waves according to various exemplary embodiments of the present invention can reduce overall costs and the number of components.

[0084] For convenience of explanation and precise definition of the appended claims, the terms "upper", "lower", "inner", "outer", "above", "below", "upward", "downward", "front", "back", "rear", "inner", "outer", "inner", "external", "inner", "external", "inner side", "outer side", "forward", "rearward" are used to describe the features of the exemplary embodiments with reference to the positions of such features as shown in the drawings. It will also be understood that the term "connect" or its derivatives refer to both direct and indirect connections.

[0085] The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. The foregoing descriptions are not intended to be exhaustive, nor are they intended to limit the present invention to the precise form disclosed, and it is apparent that many changes and variations are possible in light of the foregoing teachings. The exemplary embodiments are selected and described to explain the specific principles of the present invention and their practical applications, so that other persons skilled in the art can implement and utilize the various exemplary embodiments of the present invention and their different selected forms and modified forms. The scope of the present invention is intended to be limited by the appended claims and their equivalents.

Claims

1. A device for amplifying sound waves, the device include: a metamaterial structure including a metamaterial inside thereof, an inlet through which air flows into the metamaterial structure, and a penetration portion formed as a portion penetrating the metamaterial structure; a membrane member coupled to the penetration portion; as well as A resonance member surrounds the membrane member and is coupled to the meta-material structure, the resonance member including an interior space therein and an exhaust port in fluid communication with an exterior of the resonance member and the interior space.

2. The device for amplifying sound waves according to claim 1, further comprising an airtight seal for maintaining airtightness of the periphery of the membrane member.

3. The device for amplifying sound waves according to claim 1, in, The metamaterial includes a plurality of channels formed repeatedly, The plurality of channels are in fluid communication with the inlet and the membrane member.

4. The device for amplifying sound waves according to claim 3, in, Each of the plurality of channels is of a folded-back shape.

5. The device for amplifying sound waves according to claim 3, in, The plurality of channels include: a first flow path extending in a direction aligned with an inflow direction of air; a second flow path extending from a terminal end of the first flow path in a leftward direction or a rightward direction relative to the first flow path; a third flow path in fluid communication with the second flow path, the third flow path extending from a terminal end of the second flow path along an extending direction of the first flow path and parallel to the first flow path; and A fourth flow path is in fluid communication with the third flow path, the fourth flow path extending from a terminal end of the third flow path toward an extending direction of the first flow path and being parallel to the second flow path.

6. The device for amplifying sound waves according to claim 1, in, A section of a hollow space is provided inside the metamaterial structure, and the penetration portion corresponds to the section.

7. The device for amplifying sound waves according to claim 6, in, The metamaterial includes a plurality of channels formed repeatedly, The air flowing into the meta-material structure through the inlet sequentially passes through the plurality of channels and the sections, and flows into the inner space of the resonance member via the membrane member.

8. The device for amplifying sound waves according to claim 7, in, The plurality of channels include: a first flow path extending in a direction aligned with an inflow direction of air; a second flow path extending from a terminal end of the first flow path in a leftward direction or a rightward direction relative to the first flow path; a third flow path in fluid communication with the second flow path, the third flow path extending from a terminal end of the second flow path along an extending direction of the first flow path and parallel to the first flow path; and A fourth flow path is in fluid communication with the third flow path, the fourth flow path extending from a terminal end of the third flow path toward an extending direction of the first flow path and being parallel to the second flow path.

9. The device for amplifying sound waves according to claim 1, in, The metamaterial structure further comprises: a first housing containing the metamaterial therein; and A second housing is hermetically coupled to the first housing and is provided with the penetration portion.

10. The device for amplifying sound waves according to claim 9, in, The first shell includes a partition member protruding from a portion of a periphery of the first shell, and the second shell includes a protrusion protruding from one side of the second shell and connected to the partition member, The inlet is defined by a space created by coupling the partitioning member and the protrusion to each other.

11. The device for amplifying sound waves according to claim 10, in, A sealing member is installed around the periphery of the inlet to ensure airtightness.

12. The device for amplifying sound waves according to claim 9, further comprising: include: a plurality of through holes passing through the first shell and the second shell; as well as A fastening member is fixedly inserted into the plurality of through holes.

13. The device for amplifying sound waves according to claim 9, in, an insert protruding from a surface of the second housing and spaced a predetermined distance from a periphery of the penetration portion, The resonance member is coupled to the insert.

14. The device for amplifying sound waves according to claim 9, in, The membrane member includes a guide protrusion and a coupling groove, The guide protrusion of the film member is configured to be received in the guide groove of the second housing, and the coupling groove of the film member is configured to be engaged with the coupling protrusion of the second housing.

15. The device for amplifying sound waves according to claim 1, in, The membrane member includes a guide protrusion and a coupling groove, The guide protrusion of the film member is configured to be received in the guide groove of the meta-material structure, and the coupling groove of the film member is configured to be engaged with the coupling protrusion of the meta-material structure.

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