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Propagation of Sound in Porous Media
This book has grown out of the research activities of the author in the fields of sound propagation in porous media and modelling of acoustic materials. It is assumed that the reader has a background of advanced calculus, including an introduction to differential equations, complex variables and matrix algebra. A prior exposure to theory of elasticity would be advantageous. Chapters 1-3 deal with sound propagation of plane waves in solids and fluids, and the topics of acoustic impedance and reflection coefficient are given a large emphasis. The topic of flow resistivity is presented in Chapter 2. Chapter 4 deals with sound propagation in porous materials having cylindrical pores. The topics ...
Ultrasonic Absorption
Standard reference in the field provides a clear, systematically organized introductory review of fundamental concepts for advanced graduate students and research workers. Numerous diagrams. Bibliography.
Active Sound Absorption
This NEW BOOK by Claude J. Mazzola introduces a novel approach to the theory of active sound absorption. The result of more than five years' work, it is now available to the general public. PARTIAL CONTENTS: * General Theory and Control Law * Spherical Black Hole * Cylindrical Black Hole * General Feedback Strategy * Feedback Strategy on a Vibrating Active Plate * Reflection Coefficient of an Active Plate * Reflection Coefficient of an Active Resonant Plate * Absorption of an Oblique Incident Wave on an Active Plate * Duality of the Max Absorption Control Law and the Radiation Admittance Law * Absorption Cross Section of an Active Sphere * Active Infinite Cylinder * Absorption Cross Section of an Active Circular Piston.
Absorption and Dispersion of Ultrasonic Waves
Absorption and Dispersion of Ultrasonic Waves focuses on the influence of ultrasonics on molecular processes in liquids and gases, including hydrodynamics, energy exchange, and chemical reactions. The book first offers information on the Stokes-Navier equations of hydrodynamics, as well as equations of motion, viscosity, formal introduction of volume viscosity, and linearized wave equation for a nonviscous fluid. The manuscript then ponders on energy exchange between internal and external degrees of freedom as relaxation phenomenon; effect of slow energy exchange on sound propagation; different ways of evaluating the dispersion curve; and exact calculation of absorption and dispersion. The t...
