Patent Publication Number: US-2022228605-A1

Title: Air amplifier with noise suppression

Description:
BACKGROUND 
     The United States Media and Entertainment Industry is the largest in the world. The United States Media and Entertainment Industry represents a third of the global media and entertainment industry which delivers events, such as musical events, theatrical events, sporting events, and/or motion picture events, to an audience for their viewing pleasure. Operators of venues, such as music venues and/or sporting venues to provide some examples, have made many attempts to further enhance the immersion of the audience as they are viewing these events. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Aspects of the present disclosure are best understood from the following detailed description when read with the accompanying figures. It is noted that, in accordance with the standard practice in the industry, features are not drawn to scale. In fact, the dimensions of the features may be arbitrarily increased or reduced for clarity of discussion. 
         FIG. 1  graphically illustrates an exemplary air amplifier with noise suppression in accordance with some exemplary embodiments; 
         FIG. 2  graphically illustrates a first exemplary air guide that can be implemented within the exemplary air amplifier in accordance with some exemplary embodiments; 
         FIG. 3A  through  FIG. 3C  graphically illustrate exemplary inner faceplates that can be implemented within the first exemplary air guide in accordance with some exemplary embodiments; 
         FIG. 4  graphically illustrates a second exemplary air guide that can be implemented within the exemplary air amplifier in accordance with some exemplary embodiments; 
         FIG. 5A  through  FIG. 5E  graphically illustrate various exemplary active acoustic suppression chambers that can be implemented within the second exemplary air guide in accordance with some exemplary embodiments; 
         FIG. 6  graphically illustrates an exemplary operation of the second exemplary air guide in accordance with some exemplary embodiments; 
         FIG. 7A  through  FIG. 7C  graphically illustrate exemplary first inner face plates that can be implemented within the second exemplary air guide in accordance with some exemplary embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     The following disclosure provides many different embodiments, or examples, for implementing different features of the provided subject matter. Specific examples of components and arrangements are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting. For example, the formation of a first feature over a second feature in the description that follows may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features may be formed between the first and second features, such that the first and second features may not be in direct contact. In addition, the present disclosure may repeat reference numerals and/or letters in the examples. This repetition does not in itself dictate a relationship between the embodiments and/or configurations discussed. 
     Overview 
     Exemplary air amplifiers described herein can utilize a high-pressure stream of gas to accelerate a low-velocity stream of gas to provide a high-velocity, high-volume stream of gas. This high-velocity, high-volume stream of gas can generate unwanted noise as the high-velocity, high-volume stream of gas propagates through the air amplifier. The exemplary air amplifiers described herein can include can passively and/or actively suppress, for example, diminish, re-tune, or even completely cancel, the unwanted noise as the high-velocity, high-volume stream of gas propagates through these exemplary air amplifiers. The exemplary air amplifiers described herein can include one or more absorption materials to passively suppress the unwanted noise generated by the high-velocity, high-volume stream of gas. The exemplary air amplifiers described herein can generate multiple noise suppression waves to actively suppress the unwanted noise generated by the high-velocity, high-volume stream of gas. The multiple noise suppression waves can destructively combine with the unwanted noise generated by the high-velocity, high-volume stream of gas to suppress the unwanted noise. 
     Exemplary Air Amplifier with Noise Suppression 
       FIG. 1  graphically illustrates an exemplary air amplifier with noise suppression in accordance with some exemplary embodiments. As illustrated in  FIG. 1 , an air amplifier  100  utilizes a high-pressure stream of gas to accelerate a low-velocity stream of gas to provide a high-velocity, high-volume stream of gas. These streams of gas, as well as other streams of gas as described herein, can include any gaseous element, compound, and/or mixture of elements and/or compounds, for example, ambient air. Moreover, these streams of gas, as well as other streams of gas as described herein, can additionally, or alternatively, include any elements, compounds, and/or mixtures of elements that are in a gaseous state, for example, water in its gaseous state, also referred to as steam. As to be described in further detail below, the high-velocity, high-volume stream of gas can generate unwanted noise as the high-velocity, high-volume stream of gas propagates through the air amplifier  100 . As to be described in further detail below, the air amplifier  100  can include can suppress, for example, diminish, re-tune, or even completely cancel, the unwanted noise as the high-velocity, high-volume stream of gas propagates through the air amplifier  100 . In the exemplary embodiment illustrated in  FIG. 1 , the air amplifier  100  can include an air amplification engine  102  and an air guide  104  that are to be described in further detail below. 
     The air amplification engine  102  utilizes energy from a high-pressure input stream of gas  150  to accelerate a low-velocity input stream of gas  152  to provide a high-velocity, high-volume input stream of gas  154 . In some embodiments, the air amplification engine  102  can be implemented as an air volume amplifier or an air pressure amplifier. In these embodiments, the air volume amplifier and/or the air pressure amplifier can be implemented as a standard, also referred to as a fixed, air amplifier or an adjustable, also referred to as a variable, air amplifier. 
     The air guide  104  can shape the high-velocity, high-volume input stream of gas  154  as the high-velocity, high-volume input stream of gas  154  propagates through the air guide  104  to provide the high-velocity, high-volume output stream of gas  158 . In some embodiments, the air guide  104  can be mechanically connected to the air amplification engine  102  with various fasteners, such as nuts, screws, bolts, rivets, pins, and/or lags to provide some examples. In some embodiments, the high-velocity, high-volume input stream of gas  154  can propagate along one or more surfaces of the air guide  104  as the high-velocity, high-volume input stream of gas  154  propagates through the air guide  104 . In the exemplary embodiment illustrated in  FIG. 1 , the high-velocity, high-volume input stream of gas  154  can generate an unwanted noise  156  as the high-velocity, high-volume input stream of gas  154  propagates through the air amplifier  100 . As to be described in further detail below, the air guide  104  can suppress for example, diminish, re-tune, or even completely cancel, the unwanted noise  156  generated by the high-velocity, high-volume input stream of gas  154 . In some embodiments, the air guide  104  can implemented using one or more rigid materials, such as one or more metals, one or more plastic materials, and/or one or more fiberglass materials to provide some examples, to provide a rigid, or fixed, air guide and/or a non-rigid, flexible material to provide a moveable, or adjustable, air guide. 
     Generally, the air guide  104  can be characterized as being a three-dimensional shape including a hollow cavity for propagating and/or shaping the high-velocity, high-volume input stream of gas  154  as the high-velocity, high-volume input stream of gas  154  propagates through the air guide  104 . As illustrated in  FIG. 1 , the air guide  104  can include an air inflow  106  to receive the high-velocity, high-volume input stream of gas  154  from the air amplification engine  102 , an air duct  108  to shape the high-velocity, high-volume input stream of gas  154 , and an air outflow  110  to further shape the high-velocity, high-volume input stream of gas  154  to provide the high-velocity, high-volume output stream of gas  158 . Generally, the air inflow  106  is implemented using a regular closed geometric opening that is compatible with the air amplification engine  102  and the air outflow  110  is implemented using a regular closed geometric opening to further shape the high-velocity, high-volume input stream of  154  as the high-velocity, high-volume input stream of gas  154  is departing the air guide  104 . In the exemplary embodiment illustrated in  FIG. 1 , the air guide  104  is implemented using circular openings at the air inflow  106  and the air outflow  110 . In this exemplary embodiment, a diameter of the circular opening at the air inflow  106  is less than a diameter of the circular opening at the air outflow  110  such that the air duct  108  approximates a tapered conical cylinder. However, those skilled in the relevant art(s) will recognize that the air inflow  106  and/or the air outflow  110  can be implemented using other regular closed geometric structures, irregular closed structures, such as one or more irregular polygons to provide an example, and/or any suitable combination of closed structures that will be apparent to those skilled in the relevant art(s) without departing from the spirit and scope of the present disclosure. As illustrated in  FIG. 1 , the air duct  108  can be gradually tapered to provide an exponential decrease of its cross-sectional area and/or an exponential decrease of its cross-sectional area to form a conical horn shape. As the high-velocity, high-volume input stream of gas  154  propagates through the air duct  108 , the high-velocity, high-volume input stream of gas  154  follows this horn shape which can shape the high-velocity, high-volume input stream of gas  154  to provide a truncated cone as the high-velocity, high-volume output stream of gas  158 . However, those skilled in the relevant art(s) will recognize that the air duct  108  can be implemented using other configurations and arrangements to shape the high-velocity, high-volume input stream of gas  154  differently to provide other can shape for the high-velocity, high-volume output stream of gas  158  without departing from the spirit and scope of the present disclosure. 
     Moreover, as illustrated in  FIG. 1 , the air guide  104  can suppress the unwanted noise  156  generated by the high-velocity, high-volume input stream of gas  154  as the high-velocity, high-volume input stream of gas  154  propagates through the air amplifier  100 . In some embodiments, the unwanted noise  156  generated by the high-velocity, high-volume input stream of gas  154  can be characterized being within a frequency range, for example, an audible frequency range, such as between approximately 20 Hz and approximately 20 kHz. In some embodiments, the air amplifier  100  can be used to provide one or more atmospheric effects relating to an event, such a musical event, a theatrical event, a sporting event, a motion picture, and/or any other suitable event that will be apparent to those skilled in the relevant art(s) without departing the spirit and scope of the present disclosure, as described in U.S. patent application Ser. No. 16/997,511, filed on Aug. 19, 2020, and U.S. patent application Ser. No. 16/997,518, filed on Aug. 19, 2020, each of which is incorporated herein by reference in its entirety. In these embodiments, the unwanted noise  156  generated by the high-velocity, high-volume input stream of gas  154  can diminish the experience of the audience observing the event. As an example, the unwanted noise  156  generated by the high-velocity, high-volume input stream of gas  154  can be characterized as being a whoosh, or whoosh-like, sound within the audible frequency range which can propagate, unless suppressed, to the audience as the audience is observing the event. In this example, this whoosh, or whoosh-like, sound can overwhelm the actual audible content of the event to diminish the experience of the audience observing the event. 
     In some embodiments, the air guide  104  can include one or more absorption materials to passively suppress the unwanted noise  156  generated by the high-velocity, high-volume input stream of gas  154 . The one or more absorption materials can include one or more acoustic foams, also referred to as studio foams; one or more sound insulations, such as mineral wool, rock wool, and/or fiberglass to provide some examples; one or more acoustic fabrics; one or more acoustic coatings, such as Mass Loaded Vinyl (MLV) to provide an example; one or more acoustic paints; and/or any other suitable material that exhibits a non-resonant quality and is capable of absorbing the unwanted noise  156  generated by the high-velocity, high-volume input stream of gas  154  that will be apparent to those skilled in the relevant art(s) without departing the spirit and scope of the present disclosure. In some embodiments, the air guide  104  can generate multiple noise suppression waves to actively suppress the unwanted noise  156  generated by the high-velocity, high-volume input stream of gas  154 . As to be described in further detail below, the high-velocity, high-volume input stream of gas  154  can cause the air guide  104  to resonate by, for example, Helmholtz resonance, to generate multiple noise suppression waves. In some embodiments, the multiple noise suppression waves can be characterized being within a frequency range, for example, an audible frequency range, such as between approximately 20 Hz and approximately 20 kHz. The multiple noise suppression waves can destructively combine with the unwanted noise  156  generated by the high-velocity, high-volume input stream of gas  154  to suppress the unwanted noise  156 . 
     First Exemplary Air Guide that can be Implemented within the Exemplary Air Amplifier 
       FIG. 2  graphically illustrates a first exemplary air guide that can be implemented within the exemplary air amplifier in accordance with some exemplary embodiments. In the exemplary embodiment illustrated in  FIG. 2 , an air guide  200  can be coupled to an amplification engine, such as the amplification engine  102  as described above in  FIG. 1 , which utilizes energy from a high-pressure input stream of gas to accelerate a low-velocity input stream of gas to provide the high-velocity, high-volume input stream of gas  154 . The air guide  200  can shape the high-velocity, high-volume input stream of gas  154  as the high-velocity, high-volume input stream of gas  154  propagates through the air guide  200  to provide the high-velocity, high-volume output stream of gas  158  as described above in  FIG. 1 . And as described above, the high-velocity, high-volume input stream of gas  154  can generate the unwanted noise  156  as the high-volume input stream of gas  154  propagates through the air guide  200 . As to be described in further detail below, the air guide  200  can be characterized as passively suppressing for example, diminishing, re-tuning, or even completely cancelling, the unwanted noise  156 . As illustrated in  FIG. 2 , the air guide  200  can include a first inner faceplate  204 , a passive acoustic absorption chamber  206 , and a second outer faceplate  208 . As to be described in further detail below, the first inner faceplate  204 , the passive acoustic absorption chamber  206 , and the second outer faceplate  208  are configured and arranged to implement a passive sound attenuator to passively suppress the unwanted noise  156 . In some embodiments, the passive sound attenuator can be implemented as a dissipative silencer which suppresses the unwanted noise  156  by transferring the kinetic energy of the unwanted noise  156  into heat energy. The air guide  200  can represent an exemplary embodiment of the air guide  104  as described above in  FIG. 1 . 
     In the exemplary embodiment illustrated in  FIG. 2 , the first inner faceplate  204  forms an innermost assembly of the air guide  200 . In the exemplary embodiment illustrated in  FIG. 2 , the air guide  200  can be characterized as having a hollow cavity along the longitudinal axis L. In some embodiments, the first inner faceplate  204  can be situated within the hollow cavity along a longitudinal axis L. However, those skilled in the relevant art(s) will recognize that the first inner faceplate  204  need not be situated along the longitudinal axis L in its entirety. In some embodiments, the first inner faceplate  204  can be situated along a portion of the longitudinal axis L. In some embodiments, the first inner faceplate  204  can have a uniform cross-sectional area along the longitudinal axis L of the air guide  200 . For example, the first inner faceplate  204  can be characterized as being a cylindrical, or a cylindrical-like, shell that is situated within the hollow cavity. In some embodiments, the first inner faceplate  204  can have a non-uniform cross-sectional area along the longitudinal axis L of the air guide  200 . For example, the first inner faceplate  204  can be characterized as being gradually thinned or narrowed towards an air inflow, such as the air inflow  106  as described above in  FIG. 1 , and/or an air outflow, such as the air outflow  110  as described above in  FIG. 1 , also referred to as being tapered, along the longitudinal axis L. 
     As illustrated in  FIG. 2 , the first inner faceplate  204  can shape the high-velocity, high-volume input stream of gas  154  as the high-velocity, high-volume input stream of gas  154  propagates through the air guide  200 . In some embodiments, the first inner faceplate  204  can be implemented as a three-dimensional shape, such as a cube, a rectangular prism, a sphere, a cone, a cylinder, and/or any other suitable three-dimensional shape that will be apparent to those skilled in the relevant art(s) without departing from the spirit and scope of the present disclosure to provide some examples, having the hollow cavity along the longitudinal axis L. In the exemplary embodiment illustrated in  FIG. 2 , the high-velocity, high-volume input stream of gas  154  and the unwanted noise  156  traverse within the first inner faceplate  204 . As illustrated in  FIG. 2 , the unwanted noise  156  can propagate through the first inner faceplate  204  onto the passive acoustic absorption chamber  206 . In some embodiments, the first inner faceplate  204  can be implemented using one or more metallic materials, such as iron, steel, copper, bronze, brass, or aluminum to provide some examples, one or more non-metallic materials, such as wood, plastic, or glass, and/or any combination thereof. In some embodiments, the first inner faceplate  204  can include one or more perforations to allow the unwanted noise  156  to propagate through the first inner faceplate  204  onto the passive acoustic absorption chamber  206 . In these embodiments, the one or more perforations can be implemented using one or more regular closed geometric openings, such as ellipses, hexagons, and/or diamonds to provide some examples, within the first inner faceplate  204  that are free of the one or more metallic materials and/or the one or more non-metallic materials. However, those skilled in the relevant art(s) will recognize that the one or more perforations can be implemented using other regular closed geometric structures, irregular closed structures, such as one or more irregular polygons to provide an example, and/or any suitable combination of closed structures that will be apparent to those skilled in the relevant art(s) without departing from the spirit and scope of the present disclosure. In some embodiments, the one or more perforations can be substantially similar to one another throughout the first inner faceplate  204 , differ from one another throughout the first inner faceplate  204 , and/or any combination thereof. In some embodiments, one or more regions of the first inner faceplate  204  can have substantially similar perforations that differ from perforations in other regions of the first inner faceplate  204 . 
     In the exemplary embodiment illustrated in  FIG. 2 , the passive acoustic absorption chamber  206  can be situated between the first inner faceplate  204  and the second outer faceplate  208 . As described above, the air guide  200  can be characterized as having a hollow cavity along the longitudinal axis L. In some embodiments, the passive acoustic absorption chamber  206  can be situated within the hollow cavity along the longitudinal axis L. However, those skilled in the relevant art(s) will recognize that the passive acoustic absorption chamber  206  need not be situated along the longitudinal axis L in its entirety. In some embodiments, the passive acoustic absorption chamber  206  can be situated along a portion of the longitudinal axis L. In some embodiments, the passive acoustic absorption chamber  206  can have a uniform cross-sectional area along the longitudinal axis L of the air guide  200 . For example, the passive acoustic absorption chamber  206  can be characterized as being a cylindrical, or a cylindrical-like, shell that is situated within the hollow cavity. In some embodiments, the passive acoustic absorption chamber  206  can have a non-uniform cross-sectional area along the longitudinal axis L of the air guide  200 . For example, the passive acoustic absorption chamber  206  can be characterized as being gradually thinned or narrowed towards an air inflow, such as the air inflow  106  as described above in  FIG. 1 , and/or an air outflow, such as the air outflow  110  as described above in  FIG. 1 , also referred to as being tapered, along the longitudinal axis L. 
     In the exemplary embodiment illustrated in  FIG. 2 , the passive acoustic absorption chamber  206  can passively suppress, namely, absorb, the unwanted noise  156  propagating through the air guide  200 . As illustrated in  FIG. 2 , the unwanted noise  156  can collide with the first inner faceplate  204  as the unwanted noise  156  propagates through the air guide  200 . Each collision between the unwanted noise  156  and the first inner faceplate  204  can cause some of the unwanted noise  156  to propagate through the first inner faceplate  204  onto the passive acoustic absorption chamber  206  and some of the unwanted noise  156  to continue to propagate through the air guide  200 . Thereafter, some of the unwanted noise  156  which propagates through the first inner faceplate  204  can be suppressed, namely, absorbed, by the passive acoustic absorption chamber  206  and/or some of the unwanted noise  156  which propagates through the first inner faceplate  204  can continue propagate through the passive acoustic absorption chamber  206  onto the second outer faceplate  208 . In some embodiments, the passive acoustic absorption chamber  206  can transfer the kinetic energy of the unwanted noise  156  into heat energy to suppress the unwanted noise  156 . In some embodiments, the amount of the unwanted noise  156  that is absorbed by the passive acoustic absorption chamber  206  can be related to one or more acoustic impedances of the passive acoustic absorption chamber  206 , a wavelength of the unwanted noise  156 , and/or an incident angle between the unwanted noise  156  and the first inner faceplate  204 . In some embodiments, the passive acoustic absorption chamber  206  can include one or more porous sound absorption materials such as acoustic foams, also referred to as studio foams; one or more sound insulations, such as mineral wool, rock wool, and/or fiberglass to provide some examples; one or more acoustic fabrics; one or more acoustic coatings, such as Mass Loaded Vinyl (MLV) to provide an example; one or more acoustic paints; and/or any other suitable material that is capable of absorbing the unwanted noise propagating through the passive acoustic absorption chamber  206 . 
     In the exemplary embodiment illustrated in  FIG. 2 , the second outer faceplate  208  forms an outermost assembly of the air guide  200 . As described above, the air guide  200  can be characterized as having a hollow cavity along the longitudinal axis L. In some embodiments, the second outer faceplate  208  can be situated along the longitudinal axis L. In other embodiments, the three-dimensional shape of the second outer faceplate  208  can be different from the three-dimensional shape of the first inner faceplate  204 . In some embodiments, the second outer faceplate  208  can be implemented as a three-dimensional shape, such as a cube, a rectangular prism, a sphere, a cone, a cylinder, and/or any other suitable three-dimensional shape that will be apparent to those skilled in the relevant art(s) without departing from the spirit and scope of the present disclosure to provide some examples having a hollow cavity. In some embodiments the three-dimensional shape of the second outer faceplate  208  can be substantially similar to the three-dimensional shape of the first inner faceplate  204 . Moreover, as described above, some of the unwanted noise  156  which propagates through the first inner faceplate  204  can propagate through the passive acoustic absorption chamber  206  onto the second outer faceplate  208 . In some embodiments, the second outer faceplate  208  can reflect the unwanted noise  156  that propagates through the passive acoustic absorption chamber  206  back onto the passive acoustic absorption chamber  206 . In these embodiments, the second outer faceplate  208  can be implemented using one or more acoustically reflective materials, such as the one or more metallic materials as described above, the one or more non-metallic materials as described above, and/or any combination thereof. In some embodiments, the second outer faceplate  208  can be implemented using sufficiently dense materials from among the one or more non-metallic materials which can prevent the second outer faceplate  208  from resonating as the unwanted noise  156  propagates through the air guide  200 . 
     In the exemplary embodiment illustrated in  FIG. 2 , the air guide  200  can optionally include an endcap  210  to secure the first inner faceplate  204 , the passive acoustic absorption chamber  206 , and the second outer faceplate  208  within the air guide  200  as the high-velocity, high-volume input stream of gas  154  propagates through the air guide  200 . As illustrated in  FIG. 2 , the endcap  210  can be implemented  210  can be implemented as a cylindrical shape having a hollow cavity of a truncated cone formed therein. However, those skilled in the relevant art(s) will recognize that the endcap  210  and/or the hollow cavity formed therein can be implemented using other three-dimensional shapes, such as cubes, rectangular prisms, cylinders, and/or spheres to provide some examples, without departing from the spirit and scope of the present disclosure. In some embodiments, the endcap  210  can be configured and arranged to be mechanically connected to the second outer faceplate  208  with various fasteners, such as nuts, screws, bolts, rivets, pins, and/or lags to provide some examples. In some embodiments, a cross-sectional area of the endcap  210  is greater than a cross sectional area of the second outer faceplate  208  at an air outflow, such as the air outflow  110  as described above in  FIG. 1 , of the air guide  200  to allow the endcap  210  to effectively slide over the second outer faceplate  208 . In the exemplary embodiment illustrated in  FIG. 2 , the endcap  210  can include an opening, or hole, to allow the high-velocity, high-volume input stream of gas high-volume  154  to propagates through the air guide  200 . In some embodiments, a cross-sectional area of the opening, or hole, of the endcap  210  is less than or equal to a cross sectional area of the first inner faceplate  204  at the air outflow to secure the first inner faceplate  204 , the passive acoustic absorption chamber  206 , and the second outer faceplate  208  within the air guide  200 . 
     Exemplary Inner Faceplates that can be Implemented within the First Exemplary Air Guide 
       FIG. 3A  through  FIG. 3C  graphically illustrate exemplary inner faceplates that can be implemented within the first exemplary air guide in accordance with some exemplary embodiments. As described above in  FIG. 2 , a first inner faceplate, such as the first inner faceplate  204  to provide an example, can include one or more perforations to allow the unwanted noise  156  to propagate through the first inner faceplate onto an acoustic absorption chamber, such as the passive acoustic absorption chamber  206  to provide an example. The discussion of  FIG. 3A  through  FIG. 3C  to follow is to describe various configurations and arrangements of materials that can be used to implement the first inner faceplate. However, the first inner faceplate is not limited to the materials as described in  FIG. 3A through 3C . Those skilled in the relevant art(s) will recognize that other materials having other perforations can be used to implement the first inner faceplate without departing from the spirit and scope of the present disclosure. 
     As illustrated in  FIG. 3A , a slotted sheet material  300  of one or more metallic materials, such as iron, steel, copper, bronze, brass, or aluminum to provide some examples, one or more non-metallic materials, such as wood, plastic, or glass, and/or any combination thereof can be configured and arranged to form the first inner faceplate. In an exemplary embodiment, the slotted sheet material  300  has an approximate thickness of 0.0299 inches, which corresponds to 22 Gauge. In the exemplary embodiment illustrated in  FIG. 3A , the sheet material  300  can include one or more elliptical perforations  302  to allow the unwanted noise  156  to propagate through the first inner faceplate onto the acoustic absorption chamber. In an exemplary embodiment, the slotted sheet material  300  can include approximately 4.76 elliptical perforations  302  per square inch. In some embodiments, the one or more elliptical perforations  302  can be characterized as being in one or more columns and one or more rows to form an array of elliptical perforations. As illustrated in  FIG. 3A , the one or more elliptical perforations  302  in each row of elliptical perforations from among the array of elliptical perforations are side staggered from one or more neighboring, adjacent rows of elliptical perforations from among the array of elliptical perforations. Moreover, as illustrated in  FIG. 3A , the one or more elliptical perforations  302  can be characterized as having a longitudinal axis L, a width W, and a radius R. In an exemplary embodiment, the longitudinal axis L is approximately 0.75 inches, the width W is approximately 0.125 inches, and the radius R is approximately 0.125 inches. 
     As illustrated in  FIG. 3B , a hexagonal sheet material  310  of the one or more metallic materials, the one or more non-metallic materials and/or any combination thereof can be configured and arranged to form the first inner faceplate. In an exemplary embodiment, the hexagonal sheet material  310  has an approximate thickness of 0.0299 inches, which corresponds to 22 Gauge. In the exemplary embodiment illustrated in  FIG. 3B , the hexagonal sheet material  310  can include one or more hexagonal perforations  312  to allow the unwanted noise  156  to propagate through the first inner faceplate onto the acoustic absorption chamber. In an exemplary embodiment, the hexagonal sheet material  310  can include approximately 16.09 hexagonal perforations  312  per square inch. In some embodiments, the one or more hexagonal perforations  312  can be characterized as being in one or more columns and one or more rows to form an array of hexagonal perforations. As illustrated in  FIG. 3B , the one or more hexagonal perforations  312  in each row of hexagonal perforations from among the array of hexagonal perforations are staggered from one or more neighboring, adjacent rows of hexagonal perforations from among the array of hexagonal perforations by, for example, approximately 0.28125 inches center to center at approximately 60 degrees. Moreover, as illustrated in  FIG. 3B , the one or more hexagonal perforations  312  can be characterized as having a side-to-side width W. In an exemplary embodiment, the side-to-side width W is approximately 0.25 inches. 
     As illustrated in  FIG. 3C , a diamond sheet material  320  of the one or more metallic materials, the one or more non-metallic materials and/or any combination thereof can be configured and arranged to form the first inner faceplate. In an exemplary embodiment, the diamond sheet material  320  has an approximate thickness of 0.0299 inches, which corresponds to 22 Gauge. In the exemplary embodiment illustrated in  FIG. 3B , the diamond sheet material  320  can include one or more diamond perforations  322  to allow the unwanted noise  156  to propagate through the first inner faceplate onto the acoustic absorption chamber. In an exemplary embodiment, the diamond sheet material  320  can include approximately 9.0 diamond perforations  322  per square foot horizontally, referred to as short way, and approximately 3.8 diamond perforations  322  per square foot vertically, referred to as long way. In some embodiments, the one or more diamond perforations  322  can be characterized as being in one or more columns and one or more rows to form an array of diamond perforations. As illustrated in  FIG. 3B , the one or more diamond perforations  322  in each row of diamond perforations from among the array of diamond perforations are staggered from one or more neighboring, adjacent rows of diamond perforations from among the array of diamond perforations. Moreover, as illustrated in  FIG. 3B , the one or more diamond perforations  322  can be characterized as having a short way of perforation (SWO) and a long way of perforation (LWO). In an exemplary embodiment, the SWO is approximately 1.092 inches and the LWO is approximately 2.750 inches. 
     Second Exemplary Air Guide that can be Implemented within the Exemplary Air Amplifier 
       FIG. 4  graphically illustrates a second exemplary air guide that can be implemented within the exemplary air amplifier in accordance with some exemplary embodiments. In the exemplary embodiment illustrated in  FIG. 4 , an air guide  400  can be coupled to an amplification engine, such as the amplification engine  102  as described above in  FIG. 1 , which utilizes energy from a high-pressure input stream of gas to accelerate a low-velocity input stream of gas to provide the high-velocity, high-volume input stream of gas  154  in a substantially similar manner as described above in  FIG. 1 . In the exemplary embodiment illustrated in  FIG. 4 , the air guide  400  can shape the high-velocity, high-volume input stream of air  154  as the high-velocity, high-volume input stream of gas  154  propagates through the air guide  400  to provide the high-velocity, high-volume output stream of gas  158  as described above in  FIG. 1 . And as described above, the high-velocity, high-volume input stream of gas  154  can generate the unwanted noise  156  as the high-volume input stream of gas  154  propagates through the air guide  400 . As to be described in further detail below, the air guide  400  can be characterized as actively suppressing for example, diminishing, re-tuning, or even completely cancelling, the unwanted noise  156 . As illustrated in  FIG. 4 , the air guide  400  can include the first inner faceplate  204  and the second outer faceplate  208  as described above in  FIG. 2  and an active acoustic suppression chamber  406 . As to be described in further detail below, the first inner faceplate  204 , the active acoustic suppression chamber  406 , and the second outer faceplate  208  are configured and arranged to implement an active sound attenuator to actively suppress the unwanted noise  156 . In some embodiments, the active acoustic suppression chamber can generate one or more noise suppression waves which destructively combine with the unwanted noise  156  to suppresses the unwanted noise  156 . The air guide  400  can represent an exemplary embodiment of the air guide  104  as described above in  FIG. 1 . The air guide  400  shares many substantially features as the air guide  200  as described above in  FIG. 2 ; therefore, only differences between the air guide  400  and the air guide  200  are to be described in further detail below. 
     As illustrated in  FIG. 4 , the active acoustic suppression chamber  406  can be situated within the air guide  400  in a substantially similar manner as the passive acoustic absorption chamber  206  can be situated within the air guide  200  as described above in  FIG. 2 . In the exemplary embodiment illustrated in  FIG. 4 , the active acoustic suppression chamber  406  can actively suppress the unwanted noise  156  propagating through the air guide  200 . As illustrated in  FIG. 4 , the high-volume input stream of gas  154  propagates through the air guide  400 , for example, along one or more surfaces of the first inner faceplate  204 . In some embodiments, the first inner faceplate  204  can include the one or more perforations as described above in  FIG. 2  to allow some of the high-volume input stream of gas  154  to propagate through the first inner faceplate  204  onto the active acoustic suppression chamber  406 . Thereafter, the high-volume input stream of gas  154  which propagates through the first inner faceplate  204  can cause the active acoustic suppression chamber  406  to resonate by, for example, Helmholtz resonance, to generate multiple noise suppression waves  450 . In some embodiments, the active acoustic suppression chamber  406  can be effectively tuned to resonate at one or more resonant frequencies. In these embodiments, the high-volume input stream of gas  154  which propagates through the first inner faceplate  204  can cause the ambient air within the active acoustic suppression chamber  406  to vibrate at the one or more resonant frequencies to generate the multiple noise suppression waves  450  at these resonant frequencies. In some embodiments, these resonant frequencies can be within a frequency range, for example, an audible frequency range, such as between approximately 20 Hz and approximately 20 kHz. In some embodiments, the multiple noise suppression waves  450  can destructively combine with the unwanted noise  156  generated by the high-velocity, high-volume input stream of gas  154  to suppress the unwanted noise  156 . 
     Exemplary Active Acoustic Suppression Chambers that can be Implemented within the Second Exemplary Air Guide 
       FIG. 5A  through  FIG. 5E  graphically illustrate various exemplary active acoustic suppression chambers that can be implemented within the second exemplary air guide in accordance with some exemplary embodiments. In the exemplary embodiment illustrated in  FIG. 5A , an active acoustic suppression chamber  504  can be situated between a first inner faceplate  502  and a second outer faceplate  506 . In some embodiments, the first inner faceplate  502 , the active acoustic suppression chamber  504 , and the second outer faceplate  506  can represent portions of the inner faceplate  204 , the active acoustic suppression chamber  406 , and the second outer faceplate  208 , respectively, as described above. As to be described in further detail below, the active acoustic suppression chamber  504  can use the high-velocity, high-volume input stream of gas  154  to generate multiple noise suppression waves which destructively combine with the unwanted noise  156  to actively suppress the unwanted noise  156 . 
     In the exemplary embodiment illustrated in  FIG. 5A , the active acoustic suppression chamber  504  can include acoustic suppression elements  508 . 1  through  508 . n . As illustrated in  FIG. 5A , the acoustic suppression elements  508 . 1  through  508 . n  can be configured and arranged as a series of rows and/or a series of columns to form an array of acoustic suppression elements. In some embodiments, each acoustic suppression element from among the acoustic suppression elements  508 . 1  through  508 . n  can be offset, or staggered, from its one or more neighboring, adjacent acoustic suppression elements from among the acoustic suppression elements  508 . 1  through  508 . n  to form a two-dimensional lattice of acoustic suppression elements. The two-dimensional lattice can include a rhombic lattice, a square lattice, a rectangular lattice, a parallelogrammic lattice, a triangular lattice, a hexagonal lattice, or any other suitable two-dimensional lattice that will be apparent to those skilled in the relevant art(s) without departing from the spirit and scope of the present disclosure. In some embodiments, the acoustic suppression elements  508 . 1  through  508 . n  can be implemented using one or more metallic materials, such as iron, steel, copper, bronze, brass, or aluminum to provide some examples, one or more non-metallic materials, such as wood, plastic, or glass, and/or any combination thereof. 
     In the exemplary embodiment illustrated in  FIG. 5A , the acoustic suppression elements  508 . 1  through  508 . n  can be effectively tuned to resonate at one or more resonant frequencies in a substantially similar manner as described above in  FIG. 4 . In some embodiments, the high-volume input stream of gas  154  can propagate along one or more surfaces of the first inner faceplate  504 . As illustrated in  FIG. 5A , the first inner faceplate  504  can include the one or more perforations  510 . 1  through  510 . m  to allow some of the high-volume input stream of gas  154  to propagate through the first inner faceplate  504  onto the acoustic suppression elements  508 . 1  through  508 . n . Thereafter, the high-volume input stream of gas  154  which propagates through the one or more perforations  510 . 1  through  510 . m  can cause the acoustic suppression elements  508 . 1  through  508 . n  to resonate by, for example, Helmholtz resonance, to generate multiple noise suppression waves, such as the multiple noise suppression waves  450  as described above in  FIG. 4 . 
     In the exemplary embodiment illustrated in  FIG. 5A , the high-volume input stream of gas  154  which propagates through the one or more perforations  510 . 1  through  510 . m  can cause the ambient air within the acoustic suppression elements  508 . 1  through  508 . n  to vibrate at the one or more resonant frequencies to generate the multiple noise suppression waves at these resonant frequencies. In some embodiments, the one or more resonant frequencies of the acoustic suppression elements  508 . 1  through  508 . n  can be substantially similar to one another to generate the multiple noise suppression waves having substantially similar frequencies to one another. In some embodiments, the one or more resonant frequencies of the acoustic suppression elements  508 . 1  through  508 . n  can be different from one another to generate the multiple noise suppression waves having different frequencies to one another. In some embodiments, the one or more resonant frequencies can be within a frequency range, for example, an audible frequency range, such as between approximately 20 Hz and approximately 20 kHz. Generally, the one or more resonant frequencies can be characterized as being based upon volumes of the acoustic suppression elements  508 . 1  through  508 . n . For example, an acoustic suppression element from among the acoustic suppression elements  508 . 1  through  508 . n  having a greater volume can be characterized as having a lower resonate frequency than another acoustic suppression element from among the acoustic suppression elements  508 . 1  through  508 . n  a having lower volume. 
     As illustrated in  FIG. 5B  and  FIG. 5C , the volumes of the acoustic suppression elements  508 . 1  through  508 . n  can be based upon diameters and/or lengths, or depths, of volumes of the acoustic suppression elements  508 . 1  through  508 . n . As illustrated in  FIG. 5B , each of the acoustic suppression elements  508 . 1  through  508 . n  can be characterized as having a substantially similar diameter d and/or a length L to one another. As such, the one or more resonant frequencies of the acoustic suppression elements  508 . 1  through  508 . n  having substantially similar diameters and/or lengths to one another can generate multiple noise suppression waves having substantially similar frequencies to one another. As illustrated in  FIG. 5C , the acoustic suppression elements  508 . 1  through  508 . n  can be characterized as having different diameters and/or different lengths from one another to generate multiple noise suppression waves having substantially different frequencies from one another. In an exemplary embodiment, each of the acoustic suppression elements  508 . 1  through  508 . n  can be characterized as having a length from among four (4) different lengths. In some embodiments, one of the acoustic suppression elements from among the acoustic suppression elements  508 . 1  through  508 . n  can be characterized as having a length L 1  that is greater than a length L 2  of another acoustic suppression element from among the acoustic suppression elements  508 . 1  through  508 . n . In these embodiments, the acoustic suppression element having the greater length L 1  can resonate at one or more lower resonate frequencies then the acoustic suppression element having the lesser length L 2  assuming that the diameter d 1  is approximately equal to the diameter d 2  as illustrated in  FIG. 5C . 
     As illustrated in  FIG. 5D , an acoustic suppression element  520  from among the acoustic suppression elements  508 . 1  through  508 . n  as described above in  FIG. 5A  through  FIG. 5C , can be characterized as including a three-dimensional chamber  522  with a three-dimensional hollow cavity  524  formed therein. In some embodiments, a length L, or depth, of the three-dimensional chamber  522  is substantially similar to a length L, or depth, of the three-dimensional hollow cavity  524 . In some embodiments, the three-dimensional chamber  522  and/or the three-dimensional hollow cavity  524  can be implemented as hexagonal prisms. However, those skilled in the relevant art(s) will recognize that the three-dimensional chamber  522  and/or the three-dimensional hollow cavity  524  can be implemented using other three-dimensional can shape, such as cubes, rectangular prisms, cylinders, and/or spheres to provide some examples, without departing from the spirit and scope of the present disclosure. In the exemplary embodiment illustrated in  FIG. 5D , the acoustic suppression element  520  includes an opening  526  to allow the high-velocity, high-volume input stream of gas  154  to enter into the three-dimensional hollow cavity  524  with the second outer faceplate  506  enclosing the three-dimensional hollow cavity  524 . In some embodiments, the opening  526  can be implemented using regular closed geometric openings, such as ellipses, hexagons, and/or circles to provide some examples. However, those skilled in the relevant art(s) will recognize that the opening  526  can be implemented using other regular closed geometric structures, irregular closed structures, such as one or more irregular polygons to provide an example, and/or any suitable combination of closed structures that will be apparent to those skilled in the relevant art(s) without departing from the spirit and scope of the present disclosure. 
     As illustrated in  FIG. 5E , an acoustic suppression element  540  from among the acoustic suppression elements  508 . 1  through  508 . n  as described above in  FIG. 5A  through  FIG. 5C , can be characterized as including the three-dimensional chamber  522  with the three-dimensional hollow cavity  524  formed therein as described above in  FIG. 5D . In some embodiments, a length L 1 , or depth, of the three-dimensional chamber  522  is substantially similar to a length L 1 , or depth, of the three-dimensional hollow cavity  524 . In the exemplary embodiment illustrated in  FIG. 5E , the acoustic suppression element  540  includes the opening  526  to allow the high-velocity, high-volume input stream of gas  154  to enter into the three-dimensional hollow cavity  524  with the second outer faceplate  506  enclosing the three-dimensional hollow cavity  524  in a substantially similar manner as described above in  FIG. 5D . Moreover, the acoustic suppression element  540  includes a three-dimensional plug  544  to effectively tune the acoustic suppression element  540  to resonate at one or more different resonant frequencies than the acoustic suppression element  540  as described above in  FIG. 5D . In some embodiments, a volume of the acoustic suppression element  540  can be controlled using the three-dimensional plug  544  to tune the acoustic suppression element  540 . In these embodiments, a three-dimensional plug  544  having a greater length L 2  can be used to cause the acoustic suppression element  540  to resonate at one or more higher resonate frequencies then a three-dimensional plug  544  having a lesser length L 2 . In some embodiments, the three-dimensional plug  544  can be implemented as a hexagonal prism. However, those skilled in the relevant art(s) will recognize that the three-dimensional plug  544  can be implemented using other three-dimensional shapes, such as cubes, rectangular prisms, cylinders, and/or spheres to provide some examples, without departing from the spirit and scope of the present disclosure. In some embodiments, the acoustic suppression elements  508 . 1  through  508 . n  can be implemented using one or more metallic materials, such as iron, steel, copper, bronze, brass, or aluminum to provide some examples, one or more non-metallic materials, such as wood, plastic, or glass, the one or more absorption materials as described above in  FIG. 2 , and/or any combination thereof. 
     Exemplary Operation of One of the Active Acoustic Suppression Chambers 
       FIG. 6  graphically illustrates an exemplary operation of the second exemplary air guide in accordance with some exemplary embodiments. In the exemplary embodiment illustrated in  FIG. 6 , an air guide  600  can actively suppress the unwanted noise  156  propagating through the air guide  600 . As to be described in further detail below, the high-velocity, high-volume input stream of gas  154  can cause the air guide  600  to resonate by, for example, Helmholtz resonance, to generate a noise suppression wave  650 . In some embodiments, the noise suppression wave  650  can be characterized being within a frequency range, for example, an audible frequency range, such as between approximately 20 Hz and approximately 20 kHz. The noise suppression wave  650  can destructively combine with the unwanted noise  156  generated by the high-velocity, high-volume input stream of gas  154  to suppress the unwanted noise  156 . As illustrated in  FIG. 6 , the air guide  600  can include a first inner faceplate  602  and an active acoustic suppression chamber  604 . In some embodiments, the first inner faceplate  602  can represent one or more portions of the inner faceplate  204  as described above in  FIG. 2 . In some embodiments, the active acoustic suppression chamber  604  can represent one or more portions of the active acoustic suppression chamber  406  as described above in  FIG. 4  and/or the active acoustic suppression chamber  504  as described above in  FIG. 5A  through  FIG. 5E . The noise suppression wave  650  can represent an exemplary embodiment of one or more of the multiple noise suppression waves  450  as described above in  FIG. 4 . 
     As illustrated in  FIG. 6 , the high-volume input stream of gas  154  propagates through the air guide  400 , for example, along one or more surfaces of the first inner faceplate  602 . In some embodiments, the first inner faceplate  602  can include the one or more perforations as described above in  FIG. 2  to allow some of the high-volume input stream of gas  154  to propagate through the first inner faceplate  602  onto the active acoustic suppression chamber  406 . Thereafter, the high-volume input stream of gas  154  which propagates through the first inner faceplate  602  can cause the active acoustic suppression chamber  406  to resonate by, for example, Helmholtz resonance, to generate the noise suppression wave  650 . In some embodiments, the active acoustic suppression chamber  406  can be effectively tuned to resonate at one or more resonant frequencies. In these embodiments, the active acoustic suppression chamber  406  can include a three-dimensional chamber with a three-dimensional hollow cavity, such as the three-dimensional chamber  522  and the three-dimensional hollow cavity  524  as described above in  FIG. 5A  through  FIG. 5E . In these embodiments, the active acoustic suppression chamber  406  can optionally include a three-dimensional plug, such as the dimensional plug  544  as described above in  FIG. 5A  through  FIG. 5E  to provide an example, to tune the active acoustic suppression chamber  406  to the one or more resonant frequencies. In these embodiments, the high-volume input stream of gas  154  which propagates through the first inner faceplate  602  can cause the ambient air within the dimensional hollow cavity to vibrate at the one or more resonant frequencies to generate the noise suppression wave  650  at these resonant frequencies. In some embodiments, these resonant frequencies can be within a frequency range, for example, an audible frequency range, such as between approximately 20 Hz and approximately 20 kHz. In some embodiments, the noise suppression wave  650  can destructively combine with the unwanted noise  156  generated by the high-velocity, high-volume input stream of gas  154  to suppress the unwanted noise  156 . 
     Exemplary First Inner Faceplates that can be Implemented within the Second Exemplary Air Guide 
       FIG. 7A  through  FIG. 7C  graphically illustrate exemplary first inner face plates that can be implemented within the second exemplary air guide in accordance with some exemplary embodiments. As discussed above, the high-velocity, high-volume input stream of gas  154  can propagate along one or more surfaces of a first inner faceplate, such as a first inner faceplate  700  as illustrated in  FIG. 7A , a first inner faceplate  720  as illustrated in  FIG. 7B , and/or a first inner faceplate  740  as illustrated in  FIG. 7C . As to be described in further detail below, the high-velocity, high-volume input stream of gas  154  can propagate through the first inner faceplate onto an active acoustic suppression chamber, such as an active acoustic suppression chamber  702  as illustrated in  FIG. 7A  through  FIG. 7C . The first inner faceplate  700 , the first inner faceplate  720 , and/or the first inner faceplate  740  can represent exemplary embodiments of the first inner faceplate  204  as described above in  FIG. 2 , the first inner faceplate  502  as described above in  FIG. 5A  through  FIG. 5E , and/or the first inner faceplate  602  as described above in  FIG. 6 . The active acoustic suppression chamber  702  can represent an exemplary embodiment of the active acoustic suppression chamber  504  as described above in  FIG. 5A  through  FIG. 5E  and/or the active acoustic suppression chamber  604  as described above in  FIG. 6 . 
     As illustrated in  FIG. 7A , the first inner faceplate  700  can include perforations  704 . 1  through  704 . k  to allow some of the high-volume input stream of gas  154  to propagate through the first inner faceplate  602  onto their corresponding three-dimensional chambers  706 . 1  through  706 . m  of the active acoustic suppression chamber  702 . Although the perforations  704 . 1  through  704 . k  are illustrated as being circles in  FIG. 7A , those skilled in the relevant art(s) will recognize that the perforations  704 . 1  through  704 . k  can be implemented using any regular closed geometric openings, such as ellipses, hexagons, and/or diamonds to provide some examples, within the first inner faceplate  204  without departing from the spirit and scope of the present disclosure. In the exemplary embodiment illustrated in  FIG. 7A , the perforations  704 . 1  through  704 . k  can be characterized as being uniformly separated from one another by a center-to-center spacing D P  as illustrated in  FIG. 7A . As illustrated in  FIG. 7A , each perforation from among the perforations  704 . 1  through  704 . k  is equidistant from neighboring, adjacent perforation from among the perforations  704 . 1  through  704 . k  by the center-to-center spacing D P . Additionally, the corresponding three-dimensional chambers  706 . 1  through  706 . m  can be characterized as being separated from one another by a center-to-center spacing Dc as illustrated in  FIG. 7A . In the exemplary embodiment illustrated in  FIG. 7A , the center-to-center spacing D P  is approximately equal to the center-to-center spacing Dc such that the perforations  704 . 1  through  704 . k  centrally align with their corresponding three-dimensional chambers  706 . 1  through  706 . m.    
     As illustrated in  FIG. 7B , the first inner faceplate  720  can include perforations  722 . 1  through  722 . k  to allow some of the high-volume input stream of gas  154  to propagate through the first inner faceplate  602  onto their corresponding three-dimensional chambers  706 . 1  through  706 . m  of the active acoustic suppression chamber  702 . Although the perforations  722 . 1  through  722 . k  are illustrated as being circles in  FIG. 7B , those skilled in the relevant art(s) will recognize that the perforations  722 . 1  through  722 . k  can be implemented using any regular closed geometric openings, such as ellipses, hexagons, and/or diamonds to provide some examples, within the first inner faceplate  204  without departing from the spirit and scope of the present disclosure. In the exemplary embodiment illustrated in  FIG. 7B , the perforations  722 . 1  through  722 . k  can be characterized as being uniformly separated from one another by the center-to-center spacing D P  as illustrated in  FIG. 7B . As illustrated in  FIG. 7B , each perforation from among the perforations  722 . 1  through  722 . k  is equidistant from neighboring, adjacent perforation from among the perforations  722 . 1  through  722 . k  by the center-to-center spacing D P . Additionally, the corresponding three-dimensional chambers  706 . 1  through  706 . m  can be characterized as being separated from one another by the center-to-center spacing Dc as illustrated in  FIG. 7B . In the exemplary embodiment illustrated in  FIG. 7B , the center-to-center spacing D P  is less than the center-to-center spacing Dc such that the perforations  722 . 1  through  722 . k  can be characterized as being offset from their corresponding three-dimensional chambers  706 . 1  through  706 . m . Although not illustrated, the center-to-center spacing D P  can be greater than the center-to-center spacing Dc such that the perforations  722 . 1  through  722 . k  can be similarly characterized as being offset from their corresponding three-dimensional chambers  706 . 1  through  706 . m.    
     As illustrated in  FIG. 7C , the first inner faceplate  740  can include perforations  742 . 1  through  742 . k  to allow some of the high-volume input stream of gas  154  to propagate through the first inner faceplate  602  onto their corresponding three-dimensional chambers  706 . 1  through  706 . m  of the active acoustic suppression chamber  702 . Although the perforations  742 . 1  through  742 . k  are illustrated as being circles in  FIG. 7C , those skilled in the relevant art(s) will recognize that the perforations  742 . 1  through  742 . k  can be implemented using any regular closed geometric openings, such as ellipses, hexagons, and/or diamonds to provide some examples, within the first inner faceplate  204  without departing from the spirit and scope of the present disclosure. In the exemplary embodiment illustrated in  FIG. 7C , the perforations  742 . 1  through  742 . k  can be characterized as being variably separated from one another by variable center-to-center spacings D P  in a similar manner as described above. As illustrated in  FIG. 7C , each perforation from among the perforations  742 . 1  through  742 . k  can be separated from neighboring, adjacent perforation from among the perforations  742 . 1  through  742 . k  by a corresponding center-to-center spacing D P  from among center-to-center spacings D P1  through D PN . For example, as illustrated in  FIG. 7C , a perforation  742 . 1  is separated from its neighboring, adjacent perforation  706 . 2  by a center-to-center spacing D P1  which is separated from its neighboring, adjacent perforation  706 . 2  by a center-to-center spacing D P2 . In this example, the center-to-center spacing D P1  can be different, for example, less than or greater than, the center-to-center spacing D P2  which results in the perforation  742 . 1  through the perforation  742 . 3  being variably separated from one another. 
     CONCLUSION 
     The Detailed Description referred to accompanying figures to illustrate exemplary embodiments consistent with the disclosure. References in the disclosure to “an exemplary embodiment” or “exemplary embodiments” indicates that the exemplary embodiment(s) described can include a particular feature, structure, or characteristic, but every exemplary embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same exemplary embodiment. Further, any feature, structure, or characteristic described in connection with an exemplary embodiment can be included, independently or in any combination, with features, structures, or characteristics of other exemplary embodiments whether or not explicitly described. 
     The Detailed Description is not meant to limiting. Rather, the scope of the disclosure is defined only in accordance with the following claims and their equivalents. It is to be appreciated that the Detailed Description section, and not the Abstract section, is intended to be used to interpret the claims. The Abstract section can set forth one or more, but not all exemplary embodiments, of the disclosure, and thus, are not intended to limit the disclosure and the following claims and their equivalents in any way. 
     The exemplary embodiments described within the disclosure have been provided for illustrative purposes and are not intended to be limiting. Other exemplary embodiments are possible, and modifications can be made to the exemplary embodiments while remaining within the spirit and scope of the disclosure. The disclosure has been described with the aid of functional building blocks illustrating the implementation of specified functions and relationships thereof. The boundaries of these functional building blocks have been arbitrarily defined herein for the convenience of the description. Alternate boundaries can be defined so long as the specified functions and relationships thereof are appropriately performed. 
     The Detailed Description of the exemplary embodiments fully revealed the general nature of the disclosure that others can, by applying knowledge of those skilled in relevant art(s), readily modify and/or adapt for various applications such exemplary embodiments, without undue experimentation, without departing from the spirit and scope of the disclosure. Therefore, such adaptations and modifications are intended to be within the meaning and plurality of equivalents of the exemplary embodiments based upon the teaching and guidance presented herein. It is to be understood that the phraseology or terminology herein is for the purpose of description and not of limitation, such that the terminology or phraseology of the present specification is to be interpreted by those skilled in relevant art(s) in light of the teachings herein.