TY - BOOK ID - 49154062 TI - Gauge Invariance Approach to Acoustic Fields PY - 2019 SN - 9811387516 9811387508 PB - Singapore : Springer Singapore : Imprint: Springer, DB - UniCat KW - Acoustics in engineering. KW - Surfaces (Physics). KW - Acoustics. KW - Mechanics. KW - Mechanics, Applied. KW - Engineering Acoustics. KW - Characterization and Evaluation of Materials. KW - Solid Mechanics. KW - Solid State Physics. KW - Applied mechanics KW - Engineering, Mechanical KW - Engineering mathematics KW - Classical mechanics KW - Newtonian mechanics KW - Physics KW - Dynamics KW - Quantum theory KW - Surface chemistry KW - Surfaces (Technology) KW - Acoustical engineering. KW - Materials science. KW - Solid state physics. KW - Solids KW - Material science KW - Physical sciences KW - Acoustic engineering KW - Sonic engineering KW - Sonics KW - Sound engineering KW - Sound-waves KW - Engineering KW - Industrial applications UR - https://www.unicat.be/uniCat?func=search&query=sysid:49154062 AB - 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. . ER -