Description:DESCRIPTION
Technical field
[001] This disclosure relates generally to noise-dampening devices, more particularly to a noise-dampening device for vehicles.
Background
[002] Noise-dampening devices are tools, materials, or devices designed to reduce or eliminate unwanted sound by either absorbing sound energy or reducing vibrations that produce the noise. The noise-dampening devices may include tools such as acoustic panels, soundproof doors and windows, sound barriers, vibration dampers, and the like.
[003] In some scenarios, when air pressure enters a ventilating space (such as a door or a window) at high speed, an unpleasant noise may be caused. More specifically, in vehicles, the high-pressure waves may cause buffeting noise. For example, in a car that is being driven at high speed with a window partially open, a low-frequency air buffeting sound may be produced. This noise may lead to discomfort, including irritation, headaches, and fatigue, for the driver and the passengers. This may also lead to accidents.
[004] Some conventional solutions and devices use noise dampers and noise-absorbing materials (for example, fiberglass, mineral wool, various foams, or the like) that may partially reduce or absorb the noise. However, these conventional devices only offer minimal aerodynamic redirection and little to no effective acoustic noise reduction. Moreover, the conventional devices or mechanisms work well with a particular frequency range and are not able to reduce noise that is generated because of low-frequency sounds.
[005] Accordingly, there is a need for a noise-dampening device that is suitable for fully dampening a wide range of frequency noise.
SUMMARY
[006] In an embodiment, a noise-dampening device is disclosed. The noise-dampening device may include an aerodynamic body. The aerodynamic body may include a surface. The surface may include a plurality of micro-perforations formed in line with a direction of air flowing thereon. Further, the aerodynamic body may include a plurality of internal cavities formed with a plurality of micro-perforations to accommodate one or more meta-structures. The one or more meta-structures may be configured to dissipate pressure and noise of the air entering through the plurality of micro-perforations.
[007] In another embodiment, a vehicle is disclosed. The vehicle may include a noise-dampening device. The noise-dampening device may include an aerodynamic body. The aerodynamic body may include a surface. The surface may include a plurality of micro-perforations formed in line with a direction of air flowing thereon. Further, the aerodynamic body may include a plurality of internal cavities formed with a plurality of micro-perforations to accommodate one or more meta-structures. The one or more meta-structures may be configured to dissipate pressure and noise of the air entering through the plurality of micro-perforations.
[008] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
BRIEF DESCRIPTION OF THE DRAWINGS
[009] The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate exemplary embodiments and, together with the description, serve to explain the disclosed principles.
[010] FIG. 1 illustrates a schematic of a noise-dampening device mounted on a window of a vehicle, in accordance with an embodiment of the present disclosure.
[011] FIG. 2 illustrates an internal schematic of a noise-dampening device that may be mounted on a window of a vehicle, in accordance with an embodiment of the present disclosure.
[012] FIG. 3 illustrates a schematic of a meta-structure used within a plurality of internal cavities of a noise-dampening device, in accordance with an embodiment of the present disclosure.
[013] FIG. 4 illustrates a schematic of a meta-structure used within a plurality of internal cavities of a noise-dampening device, in accordance with another embodiment of the present disclosure.
DETAILED DESCRIPTION
[014] The foregoing description has broadly outlined the features and technical advantages of the present disclosure in order that the detailed description of the disclosure that follows may be better understood. Additional features and advantages of the disclosure will be described hereinafter, which form the subject of the claims of the disclosure. It should be appreciated by those skilled in the art that the conception and specific embodiments disclosed may be readily utilized as a basis for modifying other devices, systems, assemblies, and mechanisms for carrying out the same purposes of the present disclosure. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the scope of the disclosure as set forth in the appended claims. The novel features, which are believed to be characteristics of the disclosure, of its device or system, together with further objects and advantages, will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present disclosure.
[015] The terms “including”, “comprises”, “comprising”, “comprising of” or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a system or a device that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device. In other words, one or more elements in a system or apparatus preceded by “comprises… a” do not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus.
Additionally, with respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for the sake of clarity
[016] Reference will now be made to the exemplary embodiments of the disclosure, as illustrated in the accompanying drawings. Wherever possible, the same numerals have been used to refer to the same or like parts. The following paragraphs describe the present disclosure with reference to FIGs. 1-4.
[017] As explained earlier, when high-speed winds enter through an open space, such as a window, door, or ventilator, it may lead to noise inside a closed space, such as a room, a car, or a hall. The noise, when present for a long time, may cause headaches, discomfort, and fatigue. Specifically, scenarios where deep concentration is required, for example, while driving a vehicle, if a driver has a headache and/or is fatigued, an accident may be caused, which may also be life-threatening.
[018] As discussed before, conventional devices or mechanisms use noise dampers or noise-absorbing materials (for example, fiberglass, mineral wool, or various foams) to reduce or absorb the incoming noise. However, these conventional devices or mechanisms reduce noise generated by sounds of a particular frequency only. These devices do not help in reducing noise generated by a wide range of low-frequency sounds.
[019] The present disclosure solves the above problems and provides a noise-dampening device that completely dampens noise produced by sounds across a wide range of frequencies, including low frequencies. The noise-dampening device may be installed on a window or a door of a vehicle or any other enclosed space.
[020] Referring now to FIG. 1, a schematic 100 of a noise-dampening device 104 that may be mounted on a window 106 of a vehicle 102 is disclosed, in accordance with an exemplary embodiment of the present disclosure. The noise-dampening device 104 may be mounted over an upper section of the window 106 of the vehicle 102. As would be apparent, amongst other things, the window 106 may be used for letting air pass through the window 106 inside the vehicle 102. The noise-dampening device 104 may act as a window visor and may also work as a rain guard and/or a sound deflector. The vehicle 102, for example, may be a car, a truck, a bus, or the like.
[021] As is apparent from FIG. 1, the noise-dampening device 104 may have an aerodynamic body that may be contoured to enable installation and attachment along the upper edge of the vehicle 102 over the window 106. The aerodynamic body of the noise-dampening device 104 may be designed not just to dampen the noise, but to shield it from rain or sunlight, and to optimize airflow and reduce noise caused by air-related disturbance, for example, buffeting sound. To elaborate on buffeting sound, consider a scenario in which the window 106 of the vehicle 102 is open to allow ambient air to enter the cabin of the vehicle 102. However, as the vehicle 102 moves, the incoming airflow interacts with the external surfaces of the window openings, particularly with a conventional window visor, resulting in undesirable air buffeting and elevated noise levels within the cabin of the vehicle 102. The phenomenon of air buffeting typically arises due to fluctuating air pressure zones formed around the opening of the window 106 and the conventional window visor. The fluctuating air pressure zones lead to an unsteady airflow that generates audible pulsations, called air buffeting.
[022] To mitigate noise caused by air buffeting (or any other aerodynamic-related noise) and to enhance passenger comfort thereof, the noise-dampening device 104 is operatively integrated into the vehicle 102, specifically adjoined along the upper edge of the window 106. As is apparent in FIG. 1, the noise-dampening device 104 is integrated in place of a conventional window visor and is structurally and functionally optimized to reduce air-induced noise and air buffeting. The noise-dampening device 104 may be attached to the vehicle 102 using one or more fastening members at an upper edge of the window 106.
[023] The noise-dampening device 104 may include a surface that includes a plurality of micro-perforations formed in line with the usual direction of air flow. The plurality of micro-perforations allows air to pass through and enter a plurality of internal cavities. The plurality of micro-perforations may be strategically aligned with the direction of airflow and may be precisely engineered to function as passive airflow management structures. The plurality of micro-perforations and the plurality of internal cavities are further explained in detail in conjunction with FIG. 2.
[024] In addition to the plurality of internal cavities, the internal structure of the noise-dampening device 104 may include resonant structures and one or more meta-structures. These are further explained in detail in conjunction with FIG. 2 and FIG. 3. The internal structure of the noise-dampening device 104 may be manufactured using advanced manufacturing techniques, such as but not limited to, additive manufacturing or 3D printing and precision machining of lightweight metals. 3D printing allows for the creation of highly complex internal geometries that may be difficult or impossible to achieve using conventional manufacturing, enabling the integration of customized cavity networks, tuned acoustic elements, and support ribs in a single build. The construction approach not only supports the aerodynamic and acoustic objectives of the design but also contributes to reduced overall system weight and improved manufacturability.
[025] In some embodiments, the noise-dampening device 104 may be designed utilizing techniques, such as, but not limited to, single molding, two-piece injection molding process, or the like. These techniques provide manufacturing scalability and precision. This further allows for the seamless integration of one or more meta-structures and internal acoustic features. It may be noted that the outer structure and inner structure of the noise-dampening device 104 may be manufactured independently using high-precision injection molding techniques. Each mold is configured to incorporate complex geometries that define the external aerodynamic body and internal architecture of the noise-dampening device 104.
[026] Referring now to FIG. 2, an internal schematic 200 of the noise-dampening device 104 that may be mounted on the window 106 of the vehicle 102 is illustrated, in accordance with an embodiment of the present disclosure. The noise-dampening device 104 may include an aerodynamic body 202.
[027] As explained earlier, the aerodynamic body 202 may be designed to interact with airflow, such that air resistance is minimized and turbulence is reduced as air moves around the noise-dampening device 104. The aerodynamic body 202 may be formed using a material that may include but is not limited to a strong Ultra-Violet (UV) resistant polymer, UV stabilized acrylonitrile Butadiene Styrene (ABS), Acrylonitrile Styrene Acrylate (ASA), Polycarbonate (PC) with UV stabilizers, Thermoplastic Polyurethane (TPU), Thermoplastic Elastomer (TPE), Thermoplastic Copolyester (TPC), co-molded foam inserts or the like.
[028] The aerodynamic body 202 may include a plurality of micro-perforations 204, an internal cavity 206a, an internal cavity 206b, an internal cavity 206c, an internal cavity 206d, an internal cavity 206e, and an internal cavity 206f (collectively referred to as a plurality of internal cavities 206). It may be noted that the plurality of micro-perforations 204 may be formed on a surface of the aerodynamic body 202 in line with the direction of air flow. The plurality of micro-perforations 204 may be located at the bottom edge of the aerodynamic body 202, aligned with the plurality of internal cavities 206.
[029] The plurality of micro-perforations 204 are small holes or openings, precisely formed in the surface of the aerodynamic body 202, on a scale of micrometers to a few millimeters, for example, 0.3- to 0.5-millimeter (mm) diameter. The number of micro-perforations 204 may vary according to the requirement, design of the aerodynamic body 202, and the like. The space between each of the micro-perforations 204 may include approximately 2-3 mm, while considering the centre-to-centre distance of the micro-perforations 204. The micro-perforations 204 are formed in the aerodynamic body 202 by using a predefined perforating method, such as, but not limited to, laser micro-perforations, mechanical embossing, mechanical drilling, or the like. The micro-perforations 204 may be strategically arranged, sized, and aligned with the airflow to influence airflow and let the sound waves enter the plurality of internal cavities 206. The plurality of internal cavities 206 may be configured to dissipate or equalize the air pressure across the surface. Thus, by dissipating and equalizing the air pressure across the surface of the noise-dampening device 104, the noise caused by the air is reduced.
[030] By way of an example, when the vehicle 102 is in motion, air flows smoothly across the surface of the aerodynamic body 202. Due to the alignment of the plurality of micro-perforations 204 with the airflow direction, the micro-perforations 204 facilitate the controlled entry of a portion of this air into the corresponding plurality of internal cavities 206 integrated within the aerodynamic body 202.
[031] The plurality of internal cavities 206 may be configured to work like a quarter-wave resonator. For example, the plurality of internal cavities 206 may trap the sound waves by dampening the air pressure waves before they enter the cabin of the vehicle 102. In an embodiment, the plurality of internal cavities 206 may be formed with a minimum 8 mm depth running longitudinally along the aerodynamic body 202. In some configurations, the depth may range from 10 to 12 mm. The shape of the plurality of internal cavities 206 may include, but is not limited to, a cube, a cuboid, a cone, a cylinder, a sphere, a pyramid, and the like. The shape of the plurality of internal cavities 206 may be based on one or more meta-structures 208.
[032] The plurality of internal cavities 206 may include one or more meta-structures 208. The geometry of the one or more meta-structures 208 is configured to dissipate pressure and noise of the air entering through the plurality of micro-perforations 204. Examples of the one or more meta-structures 208 may include, but are not limited to, an origami-type pattern, a re-entrant honeycomb meta-structure, or an open lattice meta-structure. The plurality of internal cavities 206 may be tuned corresponding to a predefined range of frequencies and a predefined range of pressure of air configured to flow through. To this end, different dimensions, sizes, and structures of one or more meta-structures 208 may be used to dissipate a predefined range of pressure of air. An example of the predefined range may include but is not limited to 40 Hertz to 70 Hertz. The gradient of the plurality of internal cavities 206 targets the range of pressure of air to dissipate.
[033] The plurality of internal cavities 206 may thus work as Helmholtz resonators or Quarter-wave resonators, where each of the plurality of internal cavities 206 resonates at a particular frequency determined primarily by its size and the characteristics of the connecting opening. The plurality of internal cavities 206 is formed to target and attenuate specific frequencies of air-induced noise generated by turbulent airflow over the surface of the aerodynamic body 202.
[034] For example, a plurality of larger internal cavities 206 with wider openings are tuned to resonate at lower frequencies, while a plurality of smaller internal cavities 206 with narrower openings is tuned to resonate at higher frequencies. Arranging the plurality of internal cavities 206, each with slightly different tuning, allows the aerodynamic body 202 to effectively dampen a broad range of acoustic frequencies associated with buffeting and air noise. The design of the plurality of internal cavities 206 ensures that the wave energy is dissipated or cancelled within the internal structure, thereby reducing cabin noise significantly.
[035] In an embodiment, the internal cavity 206a is tuned to resonate at the frequency of 40 Hertz (Hz), the internal cavity 206b is tuned to resonate at the frequency of 50 Hz, the internal cavity 206c is tuned to resonate the frequency of 60Hz, the internal cavity 206d is tuned to resonate the frequency of 60 Hz, the internal cavity 206e is tuned to resonate the frequency of 70Hz, and the internal cavity 206f is tuned to resonate the frequency of 80 Hz. It should be noted that the plurality of internal cavities 206 may be tuned to the same frequency or distinct frequencies according to the requirement.
[036] Now referring back to the one or more meta-structures 208 that are accommodated in the plurality of internal cavities 206. The one or more meta-structures 208 may be composed of a network of interconnected walls, partitions, or ribs that define and isolate each discrete cavity, ensuring precise control over their size, shape, and spatial arrangement. Employing one or more meta-structures 208 enables modular and tunable design, allowing the plurality of internal cavities 206 to be individually shaped or sized according to desired acoustic or aerodynamic performance.
[037] For each of the plurality of internal cavities 206, the one or more meta-structures is formed in such a way that the meta-structure occupies approximately 60–80% of the total volume of the internal cavity. Moreover, the one or more meta-structures 208 facilitate the efficient distribution of stress and loads throughout the aerodynamic body 202, preventing deformation that could alter the tuning of the plurality of internal cavities 206 or degrade aerodynamic properties.
[038] Examples of the one or more meta-structures 208 may include, but are not limited to, one or more arrays of miniaturized Helmholtz resonators with folded neck geometries a membrane-type acoustic meta material, a lattice-based acoustic metamaterial, a re-entrant honeycomb structure, a coiled structure, an origami fold structure, a chiral structure, a rotating unit cell pattern, an auxetic structure, a helical channel, an open- lattice based meta-structure, and the like.
[039] In some embodiments, the aerodynamic body 202 incorporates a system of structural ribs within the one or more meta-structures 208 to provide mechanical support and maintain the overall rigidity and shape stability of the plurality of internal cavities 206 under dynamic airflow conditions. The structural ribs may be positioned to support the internal walls of the plurality of internal cavities 206 without creating unintended pathways that allow sound vibrations to bypass or interfere with the noise-dampening function of the plurality of internal cavities 206. The layout of the structural ribs may be optimized to prevent physical coupling between adjacent cavities, thereby preserving the individual acoustic tuning of each of the plurality of internal cavities 206. This ensures that the plurality of internal cavities 206 functions as independent resonators, contributing effectively to the attenuation of a broader spectrum of air-induced noise.
[040] Furthermore, the plurality of internal cavities 206 may be sealed using a predefined sealing method, such as but not limited to ultrasonic welding and/or chemically bonded seams, both of which provide airtight and durable seals without adding significant weight or altering the shape of the aerodynamic body 202. Ultrasonic welding offers the advantage of precision joining through high-frequency vibrations, resulting in seamless, high-strength bonds particularly suited for thermoplastics. Whereas chemically bonded seams use adhesive formulations tailored to the material properties, creating molecular-level bonds that are resistant to thermal cycling and environmental exposure. These sealing methods ensure that the internal air volumes remain isolated from external airflow, thereby preserving the resonant properties of each of the plurality of internal cavities 206 and preventing performance degradation due to air leakage, moisture ingress, or structural weakness over time.
[041] In some configurations, to ensure environmental durability, the surface of the noise-dampening device 104 is treated with a hydrophobic coating, which serves to prevent water ingress while maintaining passable airflow through the plurality of micro-perforations 204. The hydrophobic coating also enhances the self-cleaning properties of the surface, reducing the accumulation of dust or moisture that could otherwise impact acoustic performance.
[042] Referring now to FIG. 3, a schematic 300 of a meta-structure 302 used within the plurality of internal cavities 206 of the noise-dampening device 104 is disclosed, in accordance with an embodiment of the present disclosure.
[043] The meta-structure 302 may include, but is not limited to, an origami-type structure, and the like. In an embodiment, the meta-structure 302 is the origami-type structure. The origami-type meta-structure is a geometrically engineered pattern. The origami-type meta-structure may be designed to create a series of interconnected and folded surfaces.
[044] The origami-type meta-structure may be composed of a repeated folded surface pattern resembling the corrugated origami design (also known as Miura-ori design). As apparent from FIG. 3, the meta-structure 302 appears as a matrix of interlocked zig-zag panels forming wedge-shaped cells. Each unit of the meta-structure 302 forms a prism-like pocket with angular folds. The folds and dimensions of each of the unit cells of the meta-structure 302 may be tailored depending on acoustic tuning requirements. The angled folds in the meta-structure 302 may accommodate a plurality of meta-structure cavities 304 as shown in FIG.3. It will be apparent to a person skilled in the art that only a few meta-structure cavities 304 have been numbered in the FIG. 3 for ease of review.
[045] In an embodiment, each unit cell of the meta-structure 302 reflects, scatters, and absorbs sound waves through the plurality of internal bouncing and interference of the sound waves. The geometry of the origami pattern slows wave propagation, causing acoustic energy to decay within the meta-structure 302, thereby reducing the noise caused by the air.
[046] Referring now to FIG. 4, a schematic 400 of a meta-structure 402 used within the plurality of internal cavities 206 of the noise-dampening device 104, in accordance with an embodiment of the present disclosure. The meta-structure 402 may include, but not be limited to, a re-entrant honeycomb structure, and the like.
[047] In an embodiment, the aerodynamic body 202 may include the meta-structure 402 that may be a re-entrant honeycomb structure. The re-entrant honeycomb meta-structure may be formed as a periodic array of inwardly angled cellular units.
[048] As is apparent from FIG. 4, the re-entrant honeycomb meta-structure is a geometrically engineered configuration composed of a plurality of repeating unit cells with inward-facing or negatively angled walls. The plurality of repeating unit cells may be configured to form a plurality of meta-structure cavities 404 in order to dissipate sound energy through complex sound wave interactions inside the meta-structure 402. It will be apparent to a person skilled in the art that only the few meta-structure cavities 404 have been numbered in FIG. 4 for ease of review. It will be apparent that the wall of each unit cell forms the plurality of meta-structure cavities 404 that slow down and scatter sound waves entering the meta-structure 402.
[049] The geometry offers a plurality of internal surfaces, and sharp angle boundaries lead to increased internal reflections and sound wave trapping inside the plurality of meta-structure cavities 404. As discussed earlier, the meta-structure 402 may be angled between 30 degrees and 45 degrees with respect to the direction of incoming air. Thus, the geometry of the meta-structure 402 offers a plurality of internal multipath interference, which causes phase shifts and destructive interference, thereby reducing noise. The speed of the incoming sound wave inside the meta-structure 402 is thus effectively reduced.
[050] In some embodiments, the meta-structure 402 may be composed of a 3-dimensional lattice of re-entrant honeycomb structure units, typically shaped like inverted or nested polygons, which often resemble a bowtie or hourglass shape in the cross-section. The wall of each unit cell bends inward, forming internal protrusions, rather than radiating outward like a conventional honeycomb structure. The inward geometry of the re-entrant structure leads to auxetic behaviour (a negative Poisson’s ratio). The negative Poisson’s ratio means the structure expands laterally when stretched and contracts when compressed. The inward geometry offering the auxiliary behaviour is useful in controlling acoustic wave propagation.
[051] As will be appreciated by those skilled in the art, the noise-dampening device 104 and the vehicle 102 described in various embodiments discussed above are not routine, conventional, or well understood in the art. The noise-dampening device discussed above may be capable of offering several advantages. The proposed invention is adaptable for use on sunroof edges, door frame trims, and side mirrors to provide targeted control of aerodynamic buffeting. The proposed invention is beneficial for electric and hybrid vehicles, where reducing noise is more important because the powertrains are quieter than traditional engines.
[052] Thus, the disclosed invention significantly reduces aerodynamic buffeting and noise caused by the airflow, enhancing passenger comfort, especially when windows are open. By managing airflow through the plurality of micro-perforations 204 and precisely tuning the plurality of internal cavities 206, it is possible to effectively dampen a wide range of noise frequencies generated by airflow. The use of advanced materials and manufacturing methods, such as 3D printing and injection molding, ensures a lightweight yet robust component. Moreover, the hydrophobic coatings and hermetic sealing prevent water ingress and enhance durability in varying weather conditions.
[053] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation, no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.”
[054] In addition, where features or aspects of the disclosure are described in terms of Markush groups, those skilled in the art will recognize that the disclosure is also thereby described in terms of any individual member or subgroup of members of the Markush group.
[055] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims. , Claims:CLAIMS
I/We Claim:
1. A noise-dampening device (104) comprising:
an aerodynamic body (202) comprising:
a surface comprising a plurality of micro-perforations (204) formed in line with a direction of air flowing thereon; and
a plurality of internal cavities (206) formed with the plurality of micro-perforations (204) to accommodate one or more meta-structures (208), wherein the one or more meta-structures (208) are configured to dissipate pressure and noise of the air entering through the plurality of micro-perforations (204).
2. The noise-dampening device (104) as claimed in claim 1, wherein the plurality of micro-perforations (204) allows air to pass through and enter the plurality of internal cavities (206).
3. The noise-dampening device (104) as claimed in claim 1, wherein the plurality of internal cavities (206) is tuned corresponding to a predefined range of frequencies and a predefined range of pressure of air configured to flow through.
4. The noise-dampening device (104) as claimed in claim 1, wherein the one or more meta-structures (208) comprises a plurality of meta-structure cavities (304, 404) formed in predefined patterns to dissipate pressure and noise of the air.
5. A vehicle (102) comprising:
a noise-dampening device (104), comprising:
an aerodynamic body (202), comprising:
a surface comprising a plurality of micro-perforations (204) formed in line with a direction of air flowing thereon; and
a plurality of internal cavities (206) formed with the plurality of micro-perforations (204) to accommodate one or more meta-structures (208), wherein the one or more meta-structures (208) are configured to dissipate pressure and noise of the air entering through the plurality of micro-perforations (204).
6. The vehicle (102) as claimed in claim 5, wherein the plurality of micro-perforations (204) allows air to pass through and enter the plurality of internal cavities (206).
7. The vehicle (102) as claimed in claim 5, wherein the plurality of internal cavities (206) is tuned corresponding to a predefined range of frequencies and a predefined range of pressure of air configured to flow through.
8. The vehicle (102) as claimed in claim 5, wherein the one or more meta-structures (208) comprises a plurality of meta-structure cavities (304, 404) formed in predefined patterns to dissipate pressure and noise of the air.