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This book highlights the acoustical metamaterials’ capability to manipulate the direction of sound propagation in solids which in turn control the scattering, diffraction and refraction, the three basic mechanisms of sound propagation in solids. This gives rise to several novel theories and applications and hence the name new acoustics. As an introduction, the book mentions that symmetry of acoustic fields is the theoretical framework of acoustical metamaterials. This is then followed by describing that acoustical metamaterials began with locally resonant sonic materials which ushered in the concept of negative acoustic parameters such as mass density and bulk modulus. This complies with form invariance of the acoustic equation of motion which again exemplifies the symmetry property of acoustic fields.
Materials science. --- Acoustics. --- Continuum mechanics. --- Acoustical engineering. --- Materials Science. --- Characterization and Evaluation of Materials. --- Engineering Acoustics. --- Continuum Mechanics and Mechanics of Materials. --- Metamaterials. --- Acoustic models. --- Models, Acoustic --- Acoustical engineering --- Engineering models --- Meta materials --- Composite materials --- Electromagnetism --- Surfaces (Physics). --- Acoustics in engineering. --- Mechanics. --- Mechanics, Applied. --- Solid Mechanics. --- Classical mechanics --- Newtonian mechanics --- Physics --- Dynamics --- Quantum theory --- Surface chemistry --- Surfaces (Technology) --- Applied mechanics --- Engineering, Mechanical --- Engineering mathematics --- Acoustic engineering --- Sonic engineering --- Sonics --- Sound engineering --- Sound-waves --- Engineering --- Material science --- Physical sciences --- Industrial applications
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This book highlights the symmetry properties of acoustic fields and describes the gauge invariance approach, which can be used to reveal those properties. Symmetry is the key theoretical framework of metamaterials, as has been demonstrated by the successful fabrication of acoustical metamaterials. The book first provides the necessary theoretical background, which includes the covariant derivative, the vector potential, and invariance in coordinate transformation. This is followed by descriptions of global gauge invariance (isotropy), and of local gauge invariance (anisotropy). Sections on time reversal symmetry, reflection invariance, and invariance of finite amplitude waves round out the coverage. .
Acoustics in engineering. --- Surfaces (Physics). --- Acoustics. --- Mechanics. --- Mechanics, Applied. --- Engineering Acoustics. --- Characterization and Evaluation of Materials. --- Solid Mechanics. --- Solid State Physics. --- Applied mechanics --- Engineering, Mechanical --- Engineering mathematics --- Classical mechanics --- Newtonian mechanics --- Physics --- Dynamics --- Quantum theory --- Surface chemistry --- Surfaces (Technology) --- Acoustical engineering. --- Materials science. --- Solid state physics. --- Solids --- Material science --- Physical sciences --- Acoustic engineering --- Sonic engineering --- Sonics --- Sound engineering --- Sound-waves --- Engineering --- Industrial applications
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This book discusses the applications of signal and image processing in acoustical imaging. It first describes the basic tools involved – the 2D transform, fast Fourier transform (FFT) and applications, and deconvolution – before introducing readers to higher-order statistics, wavelets, and neural networks. It also addresses the important topic of digital signal processing, focusing on the example of homomorphic signal processing. The book then details the design of digital filters and array signal processing, and lastly examines applications in image processing: image enhancement and optimization, image restoration, and image compression.
Acoustic imaging. --- Imaging, Acoustic --- Acoustical engineering --- Acoustooptics --- Imaging systems --- Signal processing. --- Image processing. --- Speech processing systems. --- Acoustical engineering. --- Acoustics. --- Optical data processing. --- Signal, Image and Speech Processing. --- Engineering Acoustics. --- Image Processing and Computer Vision. --- Optical computing --- Visual data processing --- Bionics --- Electronic data processing --- Integrated optics --- Photonics --- Computers --- Acoustic engineering --- Sonic engineering --- Sonics --- Sound engineering --- Sound-waves --- Engineering --- Computational linguistics --- Electronic systems --- Information theory --- Modulation theory --- Oral communication --- Speech --- Telecommunication --- Singing voice synthesizers --- Pictorial data processing --- Picture processing --- Processing, Image --- Optical data processing --- Processing, Signal --- Information measurement --- Signal theory (Telecommunication) --- Optical equipment --- Industrial applications
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This book highlights time reversal acoustics, techniques based on the symmetry properties of acoustic fields. It has the unique feature that the first eleven chapters of the book are on the indepth studies of the theories of time reversal acoustics. The remaining chapters are on the four major applications of time reversal acoustics, together with their experimental setups and case studies: underwater communication, seismic exploration,nondestructive evaluation, and medical ultrasound imaging.. The gauge invariance approach to acoustic fields, proposed by the author in 2007, is confirmed by the successful fabrication of acoustical metamaterials and the applications of time reversal acoustics to superresolution. The book also presents groundbreaking applications of time reversal acoustics to underwater communication technology and the application of metamaterials to time reversal acoustics.
Acoustical engineering. --- Materials science. --- Acoustics. --- Mechanics. --- Mechanics, Applied. --- Signal processing. --- Image processing. --- Speech processing systems. --- Biomedical engineering. --- Engineering Acoustics. --- Characterization and Evaluation of Materials. --- Solid Mechanics. --- Signal, Image and Speech Processing. --- Biomedical Engineering and Bioengineering. --- Clinical engineering --- Medical engineering --- Bioengineering --- Biophysics --- Engineering --- Medicine --- Computational linguistics --- Electronic systems --- Information theory --- Modulation theory --- Oral communication --- Speech --- Telecommunication --- Singing voice synthesizers --- Pictorial data processing --- Picture processing --- Processing, Image --- Imaging systems --- Optical data processing --- Processing, Signal --- Information measurement --- Signal theory (Telecommunication) --- Applied mechanics --- Engineering, Mechanical --- Engineering mathematics --- Classical mechanics --- Newtonian mechanics --- Physics --- Dynamics --- Quantum theory --- Material science --- Physical sciences --- Acoustic engineering --- Sonic engineering --- Sonics --- Sound engineering --- Sound-waves --- Industrial applications --- Sound. --- Acoustics --- Continuum mechanics --- Mathematical physics --- Pneumatics --- Radiation --- Wave-motion, Theory of --- Sound-waves. --- Vibration --- Waves
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Vibrations --- Electronics --- Computer. Automation --- geluidsleer --- akoestiek --- technische akoestiek --- geluidsisolatie --- elektro-akoestiek --- signal processing --- signaalprocessoren --- signaalverwerking --- Acoustic imaging. --- Signal processing. --- Acoustical engineering. --- Acoustic engineering --- Sonic engineering --- Sonics --- Sound engineering --- Sound-waves --- Engineering --- Processing, Signal --- Information measurement --- Signal theory (Telecommunication) --- Imaging, Acoustic --- Acoustical engineering --- Acoustooptics --- Imaging systems --- Industrial applications
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This book highlights the acoustical metamaterials’ capability to manipulate the direction of sound propagation in solids which in turn control the scattering, diffraction and refraction, the three basic mechanisms of sound propagation in solids. This gives rise to several novel theories and applications and hence the name new acoustics. As an introduction, the book mentions that symmetry of acoustic fields is the theoretical framework of acoustical metamaterials. This is then followed by describing that acoustical metamaterials began with locally resonant sonic materials which ushered in the concept of negative acoustic parameters such as mass density and bulk modulus. This complies with form invariance of the acoustic equation of motion which again exemplifies the symmetry property of acoustic fields.
Classical mechanics. Field theory --- Vibrations --- Solid state physics --- Physics --- Surface chemistry --- Materials sciences --- Applied physical engineering --- geluidsleer --- akoestiek --- materiaalkennis --- oppervlakte-onderzoek --- geluidsisolatie --- toegepaste mechanica --- elektro-akoestiek --- mechanica
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This book discusses the applications of signal and image processing in acoustical imaging. It first describes the basic tools involved – the 2D transform, fast Fourier transform (FFT) and applications, and deconvolution – before introducing readers to higher-order statistics, wavelets, and neural networks. It also addresses the important topic of digital signal processing, focusing on the example of homomorphic signal processing. The book then details the design of digital filters and array signal processing, and lastly examines applications in image processing: image enhancement and optimization, image restoration, and image compression.
Vibrations --- Electronics --- Telecommunication technology --- Engineering sciences. Technology --- Computer. Automation --- geluidsleer --- akoestiek --- technische akoestiek --- DIP (documentimage processing) --- digitale signaalverwerking --- beeldverwerking --- optische communicatie --- optische elektronica --- spraaktechnologie --- signal processing --- datacommunicatie --- signaalprocessoren --- signaalverwerking
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