Download or read book Metamaterials with Extreme Properties for the Control of Acoustic Waves written by Matthieu Malléjac and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zero-index metamaterials, for which at least one of the effective parameters (density or dynamic compressibility for acoustics) vanishes, have received considerable attention in recent years. These materials have the particularity of inducing a considerable increase in the effective wavelength, thus offering numerous application possibilities, including, among others, propagation without phase change, acoustic hiding of diffusers, directivity control, etc. This PhD work focuses particularly on the near-zero effective density regime in acoustic metamaterials made of thin plates in air. Through an in-depth study of a periodic arrangement of thin elastic plates embedded in a waveguide, we have been able to explore analytically, numerically and experimentally some of the above effects. Particular attention is paid to the losses inherent to this type of system and their consequences on the expected behavior. We begin by studying numerically and experimentally observing a phase-change-free propagation through the metamaterial at a frequency in a stopband of the finite system. We then transpose the concept of photonic doping to acoustics. The addition of an impurity, here a well-chosen Helmholtz resonator, to the system allows to transform the regime of zero density into one where density and compressibility are simultaneously near zero. Thus, propagation without phase change is accompanied by a unitary transmission, due to the impedance matching of the system with the surrounding air. Finally, we study the possibility of performing acoustic hiding or masking of an object using the acoustic wavelength stretching offered by the zero density.

Download or read book Metamaterials and Wave Control written by Eric Lheurette and published by John Wiley & Sons. This book was released on 2013-12-04 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the concept was first proposed at the end of the 20th Century, metamaterials have been the subject of much research and discussion throughout the wave community. More than 10 years later, the number of related published articles is increasing significantly. On the one hand, this success can be attributed to dreams of new physical objects which are the consequences of the singular properties of metamaterials. Among them, we can consider the examples of perfect lensing and invisibility cloaking. On other hand, metamaterials also provide new tools for the design of well-known wave functions such as antennas for electromagnetic waves. The goal of this book is to propose an overview of the concept of metamaterials as a perspective on a new practical tool for wave study and engineering. This includes both the electromagnetic spectrum, from microwave to optics, and the field of acoustic waves. Contents 1. Overview of Microwave and Optical Metamaterial Technologies, Didier Lippens. 2. MetaLines: Transmission Line Approach for the Design of Metamaterial Devices, Bruno Sauviac. 3. Metamaterials for Non-Radiative Microwave Functions and Antennas, Divitha Seetharamdoo and Bruno Sauviac. 4. Toward New Prospects for Electromagnetic Compatibility, Divitha Seetharamdoo. 5. Dissipative Loss in Resonant Metamaterials, Philippe Tassin, Thomas Koschny, and Costas M. Soukoulis. 6. Transformation Optics and Antennas, André de Lustrac, Shah Nawaz Burokur and Paul-Henri Tichit. 7. Metamaterials for Control of Surface Electromagnetic and Liquid Waves, Sébastien Guenneau, Mohamed Farhat, Muamer Kadic, Stefan Enoch and Romain Quidant. 8. Classical Analog of Electromagnetically Induced Transparency, Philippe Tassin, Thomas Koschny and Costas M. Soukoulis.

Download or read book Programmable Elastic Metamaterials for Wave Control and Device Applications written by Hui Chen and published by Frontiers Media SA. This book was released on 2023-10-27 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emerging from electromagnetic waves and fast extending to acoustic and elastic waves, metamaterials that exhibit extraordinary wave control abilities have been gaining soaring attention. Over the past two decades, elastic metamaterials with engineered microstructures have provided a variety of appealing solutions for controlling elastic waves and vibrations. By tailoring their internal microstructures at a subwavelength scale, elastic metamaterials fruitfully distinct themselves from traditional materials or phononic crystals by their striking functions in wave trajectory manipulation, cloaking, nonreciprocal and topological wave control, as well as low-frequency wave/vibration mitigation and absorption.

Download or read book Metamaterial Electromagnetic Wave Absorbers written by Willie J. Padilla and published by Morgan & Claypool Publishers. This book was released on 2022-01-24 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromagnetic metamaterials are a family of shaped periodic materials which achieve extraordinary scattering properties that are difficult or impossible to achieve with naturally occurring materials. This book focuses on one such feature of electromagnetic metamaterials—the theory, properties, and applications of the absorption of electromagnetic radiation. We have written this book for undergraduate and graduate students, researchers, and practitioners, covering the background and tools necessary to engage in the research and practice of metamaterial electromagnetic wave absorbers in various fundamental and applied settings. Given the growing impact of climate change, the call for innovations that can circumvent the use of conventional energy sources will be increasingly important. As we highlight in Chapter 6, the absorption of radiation with electromagnetic metamaterials has been used for energy harvesting and energy generation, and will help to reduce reliance on fossil fuels. Other applications ranging from biochemical sensing to imaging are also covered. We hope this book equips interested readers with the tools necessary to successfully engage in applied metamaterials research for clean, sustainable energy. This book consists of six chapters. Chapter 1 provides an introduction and a brief history of electromagnetic wave absorbers; Chapter 2 focuses on several theories of perfect absorbers; Chapter 3 discusses the scattering properties achievable with metamaterial absorbers; Chapter 4 provides significant detail on the fabricational processes; Chapter 5 discusses examples of dynamical absorbers; and Chapter 6 highlights applications of metamaterial absorbers.

Download or read book Nonlocality and Willis Coupling in Acoustic Metamaterials and Metasurfaces written by Li Quan (Ph. D.) and published by . This book was released on 2020 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acoustic metamaterials and metasurfaces are artificial materials and surfaces composited with meta-atoms and inclusions at the subwavelength scale but behave homogeneously in the macroscopic scale with unusual properties in the manipulation of sound waves. Most of the research in this field has focused so far on the study of the local response of the materials and surface properties but neglected the nonlocality. This dissertation focuses on the study of nonlocal phenomena in acoustics, and explore their unusual abilities in the control and manipulation of sound waves. The dissertation starts with the exploration of pressure-velocity coupling phenomena, also known as Willis coupling or acoustic bianisotropy, in a single subwavelength inclusion and derived general bounds on the Willis response of acoustic scatterers, indicating these bounds can be reached through proper design. A systematic design approach of reciprocal Willis inclusion has been outlined for the realistic implementation of acoustic inclusions with Willis response from zero, mild to maximum. My study shows that reciprocal Willis responses can be mainly attributed to geometrical asymmetries. By breaking the system’s time-reversal symmetry through bias flow, Willis coupling has also been observed in geometry-symmetrical systems. Then, I changed my viewpoint from single inclusion to the collective response of metamaterials at the macroscopic level. By combining moving media with zero-index acoustic propagation, giant bianisotropy and extreme nonreciprocity were achieved in the metamaterials with modest mechanical motion. This special acoustic response was utilized to induce non-reciprocal positive-to-negative sound refraction and the non-reciprocal metamaterial lens which could focus object when the excitation is from a specific side. Finally, the study was extended to metasurface, and explore their unusual properties by considering the strong coupling between neighboring elements. The general impedance relation with the consideration of coupling between neighboring elements was proposed and the mechanism was applied to the design of nonlocal passive metasurfaces which could overcome the limitations of local designs, and achieve unitary efficiency for extreme beam steering. The nonlocal metasurface has also been applied to the design of acoustic hyperbolic metasurface requiring extreme anisotropic impedance which was considered impossible in the local metasurface

Download or read book Acoustic Waves in Periodic Structures Metamaterials and Porous Media written by Noé Jiménez and published by Springer Nature. This book was released on 2021-11-03 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book delivers a comprehensive and up-to-date treatment of practical applications of metamaterials, structured media, and conventional porous materials. With increasing levels of urbanization, a growing demand for motorized transport, and inefficient urban planning, environmental noise exposure is rapidly becoming a pressing societal and health concern. Phononic and sonic crystals, acoustic metamaterials, and metasurfaces can revolutionize noise and vibration control and, in many cases, replace traditional porous materials for these applications. In this collection of contributed chapters, a group of international researchers reviews the essentials of acoustic wave propagation in metamaterials and porous absorbers with viscothermal losses, as well as the most recent advances in the design of acoustic metamaterial absorbers. The book features a detailed theoretical introduction describing commonly used modelling techniques such as plane wave expansion, multiple scattering theory, and the transfer matrix method. The following chapters give a detailed consideration of acoustic wave propagation in viscothermal fluids and porous media, and the extension of this theory to non-local models for fluid saturated metamaterials, along with a description of the relevant numerical methods. Finally, the book reviews a range of practical industrial applications, making it especially attractive as a white book targeted at the building, automotive, and aeronautic industries.

Download or read book Acoustic Metamaterials and Phononic Crystals written by Pierre A. Deymier and published by Springer Science & Business Media. This book was released on 2013-01-13 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive book presents all aspects of acoustic metamaterials and phononic crystals. The emphasis is on acoustic wave propagation phenomena at interfaces such as refraction, especially unusual refractive properties and negative refraction. A thorough discussion of the mechanisms leading to such refractive phenomena includes local resonances in metamaterials and scattering in phononic crystals.

Download or read book Metamaterials written by Pankaj K. Choudhury and published by CRC Press. This book was released on 2021-11-05 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metamaterials have been in research limelight for the last few years owing to the exotic electromagnetic features these exhibit. With certain combinational forms of the design, these can be of prudent applications in developing antennas, filters, absorbers, sensors, energy harvesters, and many others. As such, the role of engineered mediums remains greatly important as the frequency region of operation determines the structure (of the medium(s)) to be developed – the fact that is exploited in the on-demand kind of tailoring the electromagnetic response of metamaterials. The relevant R&D investigators show keen interest in the fabrication of varieties of novel miniaturized devices that can be of great potentials in many micro- as well as nanotechnology-oriented applications. With this view point in mind, the Book provides the glimpse of phenomenal growth of research in this direction through covering the topics pivoted to fundamental descriptions, and theoretical and experimental results reported by pioneering scientists. It is expected that the book will be of benefit to novice researchers (such as graduate students) and expert scientists in universities and research laboratories. Some of the contents in the book are centered on industrial applications of metamaterials, thereby making the volume useful to the R&D scientists in certain industries. In summary, the book

Download or read book Recent Trends in Wave Mechanics and Vibrations written by Zuzana Dimitrovová and published by Springer Nature. This book was released on 2022-10-06 with total page 1217 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume gathers select proceedings of the 10th International Conference on Wave Mechanics and Vibrations (WMVC), held in Lisbon, Portugal, on July 4-6, 2022. It covers recent developments and cutting-edge methods in wave mechanics and vibrations applied to a wide range of engineering problems. It presents analytical and computational studies in structural mechanics, seismology and earthquake engineering, mechanical engineering, aeronautics, robotics and nuclear engineering among others. The volume will be of interest for students, researchers, and professionals interested in the wide-ranging applications of wave mechanics and vibrations.

Download or read book Characterization of Underwater Acoustic Metamaterials Inspired by Transformation Acoustics written by Colby Walker Cushing and published by . This book was released on 2021 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Underwater acoustic metamaterials (AMMs) use engineered subwavelength structures to produce novel effective material properties to control water-borne acoustic wave propagation. Transformation Acoustics (TA) is a mathematical construct that is used to specify the material properties that are necessary to achieve exotic manipulation of acoustic fields, and as such, AMMs can be the means through which physical realization of these devices can occur. An acoustic cloak is one possible device that can be designed using TA, but it is one that has garnered the most attention in academic studies due to the multi-faceted complexity of designing, fabricating, and experimentally validating performance. For an object to be indistinguishable from the background medium, an acoustic cloak requires either anisotropic effective dynamic density or anisotropic effective dynamic stiffness, but further requires these properties to be spatially dependent. Devices predicted by TA, such as cloaks, can be expensive and difficult to fabricate due to the geometric complexities of the substructures required to realize the required material properties. In some cases, state-of-the-art additive manufacturing methods are the only means of fabricating such devices. Devices predicted by TA are also difficult to characterize because of their frequency dependent dynamic behavior. Further, since the AMMs of interest in this work operate primarily at low frequencies, freefield methods are not practical. Therefore, this work investigated the characterization of select underwater AMMs predicted by TA using new and existing experimental apparatuses and techniques while evaluating the applicability of different fabrication processes to physically realize testable samples. Three materials were investigated in this work: (i) a layered AMM comprised of aluminum, air-filled, honeycomb panels coupled to one another by compliant rubber rods demonstrating anisotropic effective dynamic density, (ii) a hexagonal elastic lattice comprised of bimode unit cells that exhibits a focusing beam pattern in an underwater acoustic field by exploiting spatially varying density and stiffness, and (iii) an additively manufactured, titanium, diamond-shaped, elastic pentamode lattice that demonstrates anisotropic sound speeds due to anisotropic effective dynamic stiffness. Significant effort was expended on experimental validation of the AMM's acoustic properties, but this work also explored the relationships between homogenization theory, numerical simulation, and fabrication methods, in order achieve more robust understanding of the underwater acoustic AMMs studied here

Download or read book Proceedings of I4SDG Workshop 2021 written by Giuseppe Quaglia and published by Springer Nature. This book was released on 2021-10-13 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the papers of the 1st Workshop IFToMM for Sustainable Development Goals (I4SDG), held online on November 25-26, 2021. The main topics of the workshop include the aspects of theory, design and practice of mechanism and machine science which are instrumental in reaching a sustainable development, such as: biomechanical engineering, sustainable energy systems, robotics and mechatronics, green tribology, computational kinematics, dynamics of machinery, industrial applications of mechanism design, gearing and transmissions, multibody dynamics rotor dynamics, vibrations, humanitarian engineering, and socio-technical systems for sustainable and inclusive development. The contributions, which were selected by means of a rigorous international peer-review process, highlight numerous exciting ideas that will spur novel research directions and foster multidisciplinary collaboration among different specialists, demonstrating that medical and service robotics will drive the technological and societal change in the coming decades.

Download or read book Electromagnetic Nanomaterials written by Inamuddin and published by John Wiley & Sons. This book was released on 2023-10-24 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: ELECTROMAGNETIC METAMATERIALS The book presents an overview of metamaterials current state of development in several domains of application such as electromagnetics, electrical engineering, classical optics, microwave and antenna engineering, solid-state physics, materials sciences, and optoelectronics. Metamaterials have become a hot topic in the scientific community in recent years due to their remarkable electromagnetic properties. Metamaterials have the ability to alter electromagnetic and acoustic waves in ways that bulk materials cannot. Electromagnetic Metamaterials: Properties and Applications discusses a wide range of components to make metamaterial-engineered devices. It gives an overview of metamaterials’ current stage of development in a variety of fields such as remote aerospace applications, medical appliances, sensor detectors and monitoring devices of infrastructure, crowd handling, smart solar panels, radomes, high-gain antennas lens, high-frequency communication on the battlefield, ultrasonic detectors, and structures to shield from earthquakes. Audience Researchers and engineers in electromagnetic and electrical engineering, classical optics, microwave and antenna engineering, solid-state physics, materials sciences, and optoelectronics.

Download or read book Waves in Gradient Metamaterials written by Aleksandr Borisovich Shvart?s?burg and published by World Scientific. This book was released on 2013 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book opens a new avenue to an engendering field of applied physics, located at the OC crossingOCO of modern photonics, electromagnetics, acoustics and material science. It also highlights the concept of OC non-localityOCO, which proves to be not a special feature of quantum phenomena, but is shown to have an important counterpart in classical physics and its engineering applications too. Furthermore, it visualizes the physical results by means of simple analytical presentations, reduced sometimes to the elementary functions.

Download or read book Metamaterial based Acoustic Devices for Audio and Ultrasound Applications written by Jun Ji and published by . This book was released on 2024 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acoustic metamaterials are artificially engineered materials or structures that exhibit exotic acoustic properties that are not found in nature. They have been a highly active research area to control the behavior of acoustic waves in recent years. Acoustic metasurfaces, as the 2D version of acoustic metamaterials, have opened up unprecedented possibilities for controlling acoustic waves at will, offering a solution of molding wave propagation within a thin sheet of structures. While the majority of the research in acoustic metamaterials and metasurfaces are curiosity-driven and have shown promising progress in overcoming the fundamental physical limitations of acoustics, there has been a scarcity of acoustic metamaterials research that can have a direct and immediate impact on real-world applications. This thesis makes contributions to the fields of acoustic metamaterials by examining the challenges of some real-world applications at audio and ultrasound frequencies and putting forward novel metamaterial-based acoustic devices that overcome these limitations. In this thesis, we start to tackle the ultra-low frequency (below 100 Hz) sound absorption problem, which is a long-standing issue in room acoustics, by designing a low-frequency broadband, high absorption, near-omnidirectional acoustic metasurface absorber at a deep subwavelenth thickness guided by the causality limit. Then we extend the sound absorption in room acoustics to HVAC system, fundamentally from a one-port system without acoustic transmission to a two-ports system with acoustic transmission. A near-perfect absorption (99% absorption) is demonstrated when the spatial period of monopole-dipole resonators is close to one working wavelength (95% of the wavelength). The condition for perfect absorption is to render degenerate monopole-dipole resonators critically coupled. Besides absorption, loudness enhancement of acoustic transducers is another challenging issue at low audio frequency band. By leveraging the resonant coupling effect between the transducer and metamaterial resonances, a 3--7 dB broadband sound pressure level (SPL) improvement of acoustic radiation in the bass range (50--700 Hz) can be achieved. In addition to airborne acoustics at low audio frequency, enormous underwater applications at ultrasound frequency exist. One of the application challenges along this direction is the weak ultrasound transmission through a metallic wall due to the significant impedance mismatch between water and the wall, which impedes wireless ultrasonic power transfer and data transmission in aeronautic and aerospace engineering and nuclear engineering. We design a pillar-based acoustic metamaterial for wireless and contactless ultrasonic power transfer and data transmission through a metallic wall by leveraging the pillar's vertical elongation mode.

Download or read book World Scientific Handbook Of Metamaterials And Plasmonics In 4 Volumes written by Maier Stefan A and published by World Scientific. This book was released on 2011-06-14 with total page 1992 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metamaterials represent a new emerging innovative field of research which has shown rapid acceleration over the last couple of years. In this handbook, we present the richness of the field of metamaterials in its widest sense, describing artificial media with sub-wavelength structure for control over wave propagation in four volumes. Volume 1 focuses on the fundamentals of electromagnetic metamaterials in all their richness, including metasurfaces and hyperbolic metamaterials. Volume 2 widens the picture to include elastic, acoustic, and seismic systems, whereas Volume 3 presents nonlinear and active photonic metamaterials. Finally, Volume 4 includes recent progress in the field of nanoplasmonics, used extensively for the tailoring of the unit cell response of photonic metamaterials. In its totality, we hope that this handbook will be useful for a wide spectrum of readers, from students to active researchers in industry, as well as teachers of advanced courses on wave propagation. Contents: Volume 1: Electromagnetic Metamaterials (Ekaterina Shamonina): PrefaceElectromagnetic Metamaterials: Homogenization and Effective Properties of Mixtures (Ari Sihvola)Effective Medium Theory of Electromagnetic and Quantum Metamaterials (Mário G Silveirinha)Hyperbolic Metamaterials (Igor I Smolyaninov)Circuit and Analytical Modelling of Extraordinary Transmission Metamaterials (Francisco Medina, Francisco Mesa, Raul Rodríguez-Berral and Carlos Molero)Electromagnetic Metasurfaces: Synthesis, Realizations and Discussions (Karim Achouri and Christophe Caloz)Metasurfaces for General Control of Reflection and Transmission (Sergei Tretyakov, Viktar Asadchy and Ana Díaz-Rubio)Scattering at the Extreme with Metamaterials and Plasmonics (Francesco Monticone and Andrea Alù)All-Dielectric Nanophotonics: Fundamentals, Fabrication, and Applications (Alexander Krasnok, Roman Savelev, Denis Baranov and Pavel Belov)Tunable Metamaterials (Ilya V Shadrivov and Dragomir N Neshev)Spatial Solitonic and Nonlinear Plasmonic Aspects of Metamaterials (Allan D Boardman, Alesandro Alberucci, Gaetano Assanto, Yu G Rapoport, Vladimir V Grimalsky, Vasyl M Ivchenko and Eugen N Tkachenko)Metamaterial Catheter Receivers for Internal Magnetic Resonance Imaging (Richard R A Syms, Ian R Young and Laszlo Solymar)Microwave Sensors Based on Symmetry Properties and Metamaterial Concepts (Jordi Naqui, Ali K Horestani, Christophe Fumeaux and Ferran Martín)Volume 2: Elastic, Acoustic, and Seismic Metamaterials (Richard Craster and Sébastien Guenneau): PrefaceDynamic Homogenization of Acoustic and Elastic Metamaterials and Phononic Crystals (Richard Craster, Tryfon Antonakakis and Sébastien Guenneau)Acoustic Metamaterial (Nicholas Fang, Jun Xu, Navid Nemati, Nicolas Viard and Denis Lafarge)Flat Lens Focusing of Flexural Waves in Thin Plates (Patrick Sebbah and Marc Dubois)Space–Time Cloaking (Martin W McCall and Paul Kinsler)Soda Cans Metamaterial: Homogenization and Beyond (Fabrice Lemoult, Geoffroy Lerosey, Nadège Kaïna and Mathias Fink)New Trends Toward Locally-Resonant Metamaterials at the Mesoscopic Scale (Philippe Roux, Matthieu Rupin, Fabrice Lemoult, Geoffroy Lerosey, Andrea Colombi, Richard Craster, Sébastien Guenneau, William A Kuperman and Earl G Williams)Seismic Metamaterials: Controlling Surface Rayleigh Waves Using Analogies with Electromagnetic Metamaterials (Stéphane Brûlé, Stefan Enoch, Sébastien Guenneau and

Download or read book Bianisotropy in Passive Acoustic Metamaterials written by Caleb Frederick Sieck and published by . This book was released on 2017 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metamaterials are composite materials whose dynamic microstructure results in macroscopically observable properties beyond those available in nature. The emergence of metamaterials has enabled unprecedented control of electromagnetic, elastodynamic, and acoustic wave propagation and has led to technologies including invisibility cloaks, super- and hyper-lenses, and subwavelength bandgaps. These effects are made possible through the hidden degrees of freedom afforded by the dynamic microstructure. Analytically, the macroscopically observed parameters are the result of a dynamic homogenization procedure using weighted field averages over a representative volume element of the composite. After performing the homogenization procedure, constitutive relations reveal the dependencies between macroscopic fields and metamaterial properties. Recent research has demonstrated that dynamic homogenization results in constitutive relations that are coupled, which is not the case for most traditional materials. This general effect is well-known in electromagnetism and is known as bianisotropy, but the analogous effect in elastodynamics and acoustics was discovered more recently and is also often referred to as Willis coupling. However, most current homogenization schemes are modeled to determine macroscopic properties in the same form as traditional materials and therefore do not account for coupled constitutive relations. Additionally in the absence of embedded sources, metamaterial parameters are non-unique, which allows for macroscopic descriptions that only include traditional parameters or traditional parameters and coupling parameters. For acoustic metamaterials, the traditional properties are density and compressibility. The additional coupling parameters result in macroscopic momentum density and volume strain fields that are coupled due to both being dependent on macroscopic acoustic particle velocity and pressure fields. This dissertation explores the analogs between bianisotropy in electromagnetism, elastodynamics, and acoustics and the consequences of neglecting these effects on the physical interpretation of acoustic metamaterial parameters. The analogs are used to provide a qualitative understanding of the origin of coupling parameters, and a multiple scattering homogenization procedure is derived to demonstrate coupling due to asymmetry and nonlocal effects. Additionally, the restrictions of causality, passivity, and reciprocity on acoustic metamaterial parameters are derived, and it is demonstrated that macroscopic descriptions that neglect bianisotropy in one-dimensional acoustic metamaterials do not in general satisfy these restrictions.

Download or read book Acoustic Metamaterials written by Richard V. Craster and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: About the book: This book is the first comprehensive review on acoustic metamaterials; novel materials which can manipulate sound waves in surprising ways, which include collimation, focusing, cloaking, sonic screening and extraordinary transmission. It covers both experimental and theoretical aspects of acoustic and elastic waves propagating in structured composites, with a focus on effective properties associated with negative refraction, lensing and cloaking. Most related books in the field address electromagnetic metamaterials and focus on numerical methods, and little (or no) experimental section. Each chapter will be authored by an acknowledged expert, amongst the topics covered will be experimental results on non-destructive imaging, cloaking by surface water waves, flexural waves in thin plates. Applications in medical ultrasound imaging and modeling of metamaterials will be emphasized too. The book can serve as a reference for researchers who wish to build a solid foundation of wave propagation in this class of novel materials.