Wave mechanics Books

Book SynopsisThis corrected version of the landmark 1981 textbook introduces the physical principles and theoretical basis of acoustics with deep mathematical rigor, concentrating on concepts and points of view that have proven useful in applications such as noise control, underwater sound, architectural acoustics, audio engineering, nondestructive testing, remote sensing, and medical ultrasonics.Since its publication, this text has been used as part of numerous acoustics-related courses across the world, and continues to be used widely today. During its writing, the book was fine-tuned according to insights gleaned from a broad range of classroom settings. Its careful design supports students in their pursuit of a firm foundation while allowing flexibility in course structure. The book can easily be used in single-term or full-year graduate courses and includes problems and answers. This rigorous and essential text is a must-have for any practicing or aspiring acoustician.Table of ContentsPreface List of Symbols Chapter 1 The Wave Theory of Sound 1-1 A Little History 1-2 The Conservation of Mass 1-3 Euler's Equation of Motion for a Fluid 1-4 Pressure-Density Relations 1-5 Equations of Linear Acoustics 1-6 The Wave Equation 1-7 Plane Traveling Waves 1-8 Waves of Constant Frequency 1-9 Speed of Sound and Ambient Density 1-10 Adiabatic versus Isothermal Sound Speeds 1-11 Acoustic Energy, Intensity, and Source Power 1-12 Spherical Waves Problems Chapter 2 Quantitative Measures of Sound 2-1 Frequency Content of Sounds 2-2 Proportional Frequency Bands 2-3 Levels and the Decibel 2-4 Frequency Weighting and Filters 2-5 Combining of Levels 2-6 Mutually Incoherent Sound Sources 2-7 Fourier Series and Long-Duration Sounds 2-8 Transient Waveforms 2-9 Transfer Functions 2-10 Stationary Ergodic Processes 2-11 Bias and Variance Problems Chapter 3 Reflection, Transmission, and Excitation of Plane Waves 3-1 Boundary Conditions at Impenetrable Surfaces 3-2 Plane-Wave Reflection at a Flat Rigid Surface 3-3 Specific Acoustic Impedance 3-4 Radiation of Sound by a Vibrating Piston within a Tube 3-5 Sound Radiation by Traveling Flexural Waves 3-6 Reflection and Transmission at an Interlace between Two Fluids 3-7 Multilayer Transmission and Reflection 3-8 Transmission through Thin Solid Slabs, Plates, and Blankets Problems Chapter 4 Radiation from Vibrating Bodies 4-1 Radially Oscillating Sphere 4-2 Transversely Oscillating Rigid Sphere 4-3 Monopoles and Green's Functions 4-4 Dipoles and Quadrupoles 4-5 Uniqueness of Solutions of Acoustic Boundary-Value Problems 4-6 The Kirchhoff-Helmholtz Integral Theorem 4-7 Sound Radiation from Small Vibrating Bodies 4-8 Radiation from a Circular Disk 4-9 Reciprocity in Acoustics 4-10 Transducers and Reciprocity Problems Chapter 5 Radiation from Sources Near and on Solid Surfaces 5-1 Sources near Plane Rigid Boundaries 5-2 Sources Mounted on Walls: The Rayleigh Integral; Fresnel-Kirchhoff Theory of Diffraction by an Aperture 5-3 Low-Frequency Radiation from Sources Mounted on Walls 5-4 Radiation Impedance of Baffled-Piston Radiators 5-5 Far-Field Radiation from Localized Wall Vibrations 5-6 Transient Solution for Baffled Circular Piston 5-7 Field on and near the Symmetry Axis 5-8 Transition to the Far Field Problems Chapter 6 Room Acoustics 6-1 The Sabine-Franklin-Jaeger Theory of Reverberant Rooms 6-2 Some Modifications 6-3 Applications of the Sabine-Franklin-Jaeger Theory 6-4 Coupled Rooms and Large Enclosures 6-5 The Modal Theory of Room Acoustics 6-6 High-Frequency Approximations 6-7 Statistical Aspects of Room Acoustics 6-8 Spatial Correlations in Diffuse Sound Fields Problems Chapter 7 Low-Frequency Models of Sound Transmission 7-1 Guided Waves 7-2 Lumped-Parameter Models 7-3 Guidelines for Selecting Lumped-Parameter Models 7-4 Helmholtz Resonators and Other Examples 7-5 Orifices 7-6 Estimation of Acoustic Inertances and End Corrections 7-7 Mufflers and Acoustic Filters 7-8 Homs Problems Chapter 8 Ray Acoustics 8-1 Wavefronts, Rays, and Fermat's Principle 8-2 Rectilinear Sound Propagation 8-3 Refraction in Inhomogeneous Media 8-4 Rays in Stratified Media 8-5 Amplitude Variation along Rays 8-6 Wave Amplitudes in Moving Media 8-7 Source above an Interface 8-8 Reflection from Curved Surfaces Problems Chapter 9 Scattering and Diffraction 9-1 Basic Scattering Concepts 9-2 Monostatic and Bistatic Scattering-Measurement Configurations 9-3 The Doppler Effect 9-4 Acoustic Fields near Caustics 9-5 Shadow Zones and Creeping Waves 9-6 Source or Listener on the Edge of a Wedge 9-7 Contour-Integral Solution for Diffraction by a Wedge 9-8 Geometrical-Acoustic and Diffracted-Wave Contributions for the Wedge Problem 9-9 Applications of Wedge-Diffraction Theory Problems Chapter 10 Effects of Viscosity and Other Dissipative Processes 10-1 The Navier-Stokes-Fourier Model 10-2 Linear Acoustic Equations and Energy Dissipation 10-3 Vorticity, Entropy, and Acoustic Modes 10-4 Acoustic Boundary-Layer Theory 10-5 Attenuation and Dispersion in Ducts and Thin Tubes 10-6 Viscosity Effects on Sound Radiation 10-7 Relaxation Processes 10-8 Absorption of Sound Problems Chapter 11 Nonlinear Effects in Sound Propagation 11-1 Nonlinear Steepening 11-2 Generation of Harmonics 11-3 Weak-Shock Theory 11-4 N Waves and Anomalous Energy Dissipation 11-5 Evolution of Sawtooth Waveforms 11-6 Nonlinear Dissipative Waves 11-7 Transition to Old Age 11-8 Nonlinear Effects in Converging and Diverging Waves 11-9 N Waves in Inhomogeneous Media; Spherical Waves 11-10 Ballistic Shocks; Sonic Booms Problems Indexes Name Index Subject Index

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Book SynopsisThis undergraduate textbook aids readers in studying music and color, which involve nearly the entire gamut of the fundamental laws of classical as well as atomic physics. The objective bases for these two subjects are, respectively, sound and light. Their corresponding underlying physical principles overlap greatly: Both music and color are manifestations of wave phenomena. As a result, commonalities exist as to the production, transmission, and detection of sound and light. Whereas traditional introductory physics textbooks are styled so that the basic principles are introduced first and are then applied, this book is based on a motivational approach: It introduces a subject with a set of related phenomena, challenging readers by calling for a physical basis for what is observed. A novel topic in the first edition and this second edition is a non-mathematical study of electric and magnetic fields and how they provide the basis for the propagation of electromagnetic waves, of light in particular. The book provides details for the calculation of color coordinates and luminosity from the spectral intensity of a beam of light as well as the relationship between these coordinates and the color coordinates of a color monitor. The second edition contains corrections to the first edition, the addition of more than ten new topics, new color figures, as well as more than forty new sample problems and end-of-chapter problems. The most notable additional topics are: the identification of two distinct spectral intensities and how they are related, beats in the sound from a Tibetan bell, AM and FM radio, the spectrogram, the short-time Fourier transform and its relation to the perception of a changing pitch, a detailed analysis of the transmittance of polarized light by a Polaroid sheet, brightness and luminosity, and the mysterious behavior of the photon.The Physics of Music and Color is written at a level suitable for college students without any scientific background, requiring only simple algebra and a passing familiarity with trigonometry. The numerous problems at the end of each chapter help the reader to fully grasp the subject.Table of ContentsChapter1: Introductory Remarks.- Chapter2: The Vibrating String.- Chapter3: The Nature of Sound; The Vibrating Air Column.- Chapter4: Energy.- Chapter5: Electricity & Magnetism.- Chapter6: The Atom as a Source of Light.- Chapter7: The Principle of Superposition.- Chapter 8: Complex Waves.- Chapter9: Propagation Phenomena.- Chapter10: The Ear.- Chapter11: Psychoacoustics.- Chapter12: Tuning, Intonation, and Temperament - Choosing Frequencies for Musical Notes.- Chapter13: The Eye.- Chapter14: Characterizing Light Sources, Color Filters, and Pigments.-Chapter15: Theory of Color Vision.- Appendices.

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Book SynopsisThis book describes the entire process of designing guitars, including the theory and guidelines for implementing it in practice. It discusses areas from acoustics and resonators to new tools and how they assist traditional construction techniques. The book begins by discussing the fundamentals of the sounds of a guitar, strings, and oscillating systems. It then moves on to resonators and acoustics within the guitar, explaining the analysis systems and evaluation methods, and comparing classic and modern techniques. Each area of the guitar is covered, from the soundboard and the back, to the process of closing the instrument. The book concludes with an analysis of historic and modern guitars. This book is of interest to luthiers wanting to advance their practice, guitar players wishing to learn more about their instruments, and academics in engineering and physics curious about the principles of acoustics when applied to musical instruments.Table of ContentsThe Sound.- The String.- Oscillating Systems.- The Resonator Components.- The Resonator as a Global System.- Upper Resonances.- Analysis Systems.- Quality and Evaluation Methods.- The Modern Guitar.- Building and Using the Mould.- The Soundboard on the Mould.- The Soundboard on the Frame.- The Back.- Closing the Instrument. Final Tuning.- Analysis of Historic and Modern Guitars

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Book SynopsisAuralization is the technique of creation and reproduction of sound on the basis of computer data. With this tool it is possible to predict the character of sound signals which are generated at the source and modified by reinforcement, propagation and transmission in systems such as rooms, buildings, vehicles or other technical devices. This book is organized as a comprehensive collection of the basics of sound and vibration, acoustic modelling, simulation, signal processing and audio reproduction. With some mathematical prerequisites, the readers will be able to follow the main strategy of auralization easily and work out their own implementations of auralization in various fields of application in architectural acoustics, acoustic engineering, sound design and virtual reality. For readers interested in basic research, the technique of auralization may be useful to create sound stimuli for specific investigations in linguistic, medical, neurological and psychological research, and in the field of human-machine interaction.Table of ContentsChapter1: Fundamentals of acoustics.- Chapter2: Sound sources.- Chapter3: Sound propagation.- Chapter4: Sound fields in cavities and in rooms.- Chapter5: Structure-borne sound.- Chapter6: Psychoacoustics.- Chapter7: Signal processing for auralization.- Chapter8: Characterization of sources.- Chapter9: Convolution and binaural sound synthesis.- Chapter10: Simulation methods.- Chapter11: Simulation of sound in rooms.- Chapter12: Simulation and auralization of outdoor sound propagation.- Chapter13: Simulation and auralization of airborne sound insulation.- Chapter14: Simulation and auralization of structure-borne sound.- Chapter15: Transfer path analysis and synthesis.- Chapter16: Filter construction for real-time processing.- Chapter17: 3D sound reproduction.- Chapter18: Acoustic Virtual Reality systems.

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Book SynopsisThis book systematically presents the consolidated findings of the phenomenon of self-organization observed during the onset of thermoacoustic instability using approaches from dynamical systems and complex systems theory. Over the last decade, several complex dynamical states beyond limit cycle oscillations such as quasiperiodicity, frequency-locking, period-n, chaos, strange non-chaos, and intermittency have been discovered in thermoacoustic systems operated in laminar and turbulent flow regimes. During the onset of thermoacoustic instability in turbulent systems, an ordered acoustic field and large coherent vortices emerge from the background of turbulent combustion. This emergence of order from disorder in both temporal and spatiotemporal dynamics is explored in the contexts of synchronization, pattern formation, collective interaction, multifractality, and complex networks. For the past six decades, the spontaneous emergence of large amplitude, self-sustained, tonal oscillations in confined combustion systems, characterized as thermoacoustic instability, has remained one of the most challenging areas of research. The presence of such instabilities continues to hinder the development and deployment of high-performance combustion systems used in power generation and propulsion applications. Even with the advent of sophisticated measurement techniques to aid experimental investigations and vast improvements in computational power necessary to capture flow physics in high fidelity simulations, conventional reductionist approaches have not succeeded in explaining the plethora of dynamical behaviors and the associated complexities that arise in practical combustion systems. As a result, models and theories based on such approaches are limited in their application to mitigate or evade thermoacoustic instabilities, which continue to be among the biggest concerns for engine manufacturers today. This book helps to overcome these limitations by providing appropriate methodologies to deal with nonlinear thermoacoustic oscillations, and by developing control strategies that can mitigate and forewarn thermoacoustic instabilities. The book is also beneficial to scientists and engineers studying the occurrence of several other instabilities, such as flow-induced vibrations, compressor surge, aeroacoustics and aeroelastic instabilities in diverse fluid-mechanical environments, to graduate students who intend to apply dynamical systems and complex systems approach to their areas of research, and to physicists who look for experimental applications of their theoretical findings on nonlinear and complex systems.Table of Contents1 Introduction 1.1 Introduction to thermoacoustic instability and its consequences 1.2 Mechanisms that cause thermoacoustic instability 1.2.1 Flame surface area modulations 1.2.2 Equivalence ratio fluctuations 1.2.3 Coherent structures in the flow 1.2.4 Entropy waves 1.3 Mechanisms that damp thermoacoustic instability 1.4 Current approaches: Acoustic oscillations driven by unsteady combustion, network modelling, and eigenvalues 1.5 Why do we need a nonlinear description? 1.6 Nonlinearities in a thermoacoustic system 1.7 Thermoacoustic stability analysis: Acoustic vs dynamical systems approach 1.8 Beyond limit cycles 1.9 Thermoacoustic instability in turbulent combustors 1.10 Transition to thermoacoustic instability in turbulent reacting flow systems 1.10.1 Is combustion noise deterministic or stochastic? 1.10.2 Studying the transition to thermoacoustic instability in “noisy” systems 1.10.3 Noise induced transition, stochastic bifurcation and Fokker-Planck equation 1.10.4 Is ‘signal plus noise’ paradigm the right way to go about? 1.11 Alternate perspectives 1.11.1 Combustion noise is chaos 1.11.2 Intermittency presages the onset of thermoacoustic instability 1.11.3 Multifractal description of combustion noise and its transition to thermoacoustic instability 1.11.4 Complex networks 1.11.5 On the importance of being nonlinear 1.11.6 Reductionist vs complex systems approach 1.12 References 2 Introduction to Dynamical Systems Theory 2.1 Dynamical system 2.1.1 Conservative and dissipative dynamical systems 2.1.2 Modeling dynamical systems as discrete and continuous functions of time 2.2 Linear approximation of one-dimensional systems 2.2.1 Two-dimensional linear systems 2.3 Bifurcations and their classification 2.3.1 Saddle-node bifurcation 2.3.2 Transcritical bifurcation 2.3.3 Pitchfork bifurcation 2.3.4 Hopf bifurcation 2.4 Signals and their classification 2.4.1 Limit cycle oscillations 2.4.2 Period-= oscillations 2.4.3 Quasiperiodic oscillations 2.4.4 Chaotic oscillations 2.4.5 Difference between strange chaotic, strange nonchaotic, and chaotic nonstrange attractors 2.4.6 Intermittency 2.5 Routes to chaos 2.5.1 Period-doubling route to chaos 2.5.2 Quasiperiodic route to chaos 2.5.3 Intermittency route to chaos 2.6 Phase space reconstruction 2.6.1 Selection of optimum time delay () 2.6.2 Selection of the minimum emending dimension (d) 2.7 Poincaré map (or Poincaré section or return map) 2.8 Recurrence plots 2.8.1 Cross recurrence plots 2.8.2 Joint recurrence plot 2.8.3 Recurrence quantification analysis 2.9 References 3 Bifurcation to Limit Cycle Oscillations in Laminar Thermoacoustic Systems 3.1 A brief history of Rijke-type thermoacoustic systems 3.2 Bifurcation characteristics of a deterministic thermoacoustic system 3.3 Noise-induced transition, triggering, and stochastic bifurcation to limit cycle 3.3.1 Effect of noise on hysteresis (or bistability) of a subcritical Hopf bifurcation 3.3.2 Stochastic (or P) bifurcation 3.3.3 Triggering in thermoacoustic systems 3.4 References 4 Thermoacoustic Instability: Beyond Limit Cycle Oscillations 4.1 Bifurcation of thermoacoustic instability beyond the state of limit cycle 4.2 Other dynamical states of thermoacoustic instability 4.2.1 Strange nonchaos 4.2.2 Intermittency 4.3 Routes to chaos for thermoacoustic oscillations 4.3.1 Period-doubling route to chaos 4.3.2 Ruelle-Takens-Newhouse route to chaos 4.3.3 Intermittency route to chaos 4.4 Nonlinear nature of flame-acoustic interactions 4.5 References 5 Thermoacoustic Instability is Self-Organization in a Complex System 5.1 Examples of complex systems 5.2 Nonlinearity: The reductionist’s nightmare 5.3 Emergence 5.4 Pattern formation 5.5 Order emerging from chaos 5.6 Onset of thermoacoustic instability in turbulent combustors 5.7 Fractals and multifractals 5.8 Collective interaction in complex systems 5.9 Complex networks 5.10 Why should we use complex systems approach to study thermoacoustic instability in turbulent combustors? 5.11 Practical applications 5.12 References 6 Intermittency - A State Precedes Thermoacoustic Instability and Blowout in Turbulent Combustors 6.1 Classification of sound waves generated by turbulent flame in a combustor 6.2 What is combustion noise? 6.2.1 Phase space dynamics of acoustic pressure fluctuations during combustion noise 6.2.2 0-1 test for chaos 6.3 What is thermoacoustic instability? 6.4 Transition from combustion noise to thermoacoustic instability in turbulent combustors 6.4.1 Reformulating the onset of thermoacoustic instability as a loss of chaos 6.4.2 Intermittency route to thermoacoustic instability 6.4.3 Characteristics of the intermittency signal 6.4.4 Bifurcation analysis of intermittency route to thermoacoustic instability 6.5 Phase space and recurrence analysis of the intermittency route to thermoacoustic instability 6.6 Intermittency route to flame blowout 6.7 Type of intermittency en-route to thermoacoustic instability and its scaling laws 6.8 References 7 Spatiotemporal Dynamics of Flow, Flame, and Acoustic Fields during the Onset of Thermoacoustic Instability 7.1 Pattern formation 7.2 The emergence of patterns during the onset of thermoacoustic instability 7.3 Collective interaction of large-scale vortices during thermoacoustic instability 7.4 References 8 Synchronization of Self-excited Acoustics and Turbulent Reacting Flow Dynamics 8.1 Basics of synchronization of coupled oscillators 8.2 Mutual synchronization of the acoustic and turbulent reactive flow fields during the transition to thermoacoustic instability 8.2.1 Coupled behavior of the acoustic field and the heat release rate field in a turbulent combustor 8.2.2 Synchronization of the acoustic pressure and the global heat release rate signals during the onset of thermoacoustic instability 8.2.3 Spatiotemporal synchronization of the turbulent reacting flow field with the duct acoustics 8.3 Forced synchronization of limit cycle oscillations in thermoacoustic systems 8.3.1 Forced response of the self-excited acoustic field 8.3.2 Forced synchronization of limit cycle oscillations in a horizontal Rijke tube 8.3.3 Characteristics of the acoustic field and the heat release rate field during forced synchronization in a laminar combustor 8.3.4 Forced synchronization of multi-frequency (quasiperiodic and chaotic) thermoacoustic oscillations 8.3.5 Characteristics of forced synchronization of limit cycle oscillations in turbulent combustors 8.3.6 Forced synchronization of self-excited oscillations in the hydrodynamic field 8.4 References 9 Model for Intermittency Route to Thermoacoustic Instability 9.1 Governing equations for the one-dimensional fluid flow. 9.1.1 Continuity equation 9.1.2 Momentum equation 9.1.3 Energy equation 9.1.4 Linearized governing equations for the acoustic field 9.2 Model for intermittency route to thermoacoustic instability 9.3 References 10 Multifractal Analysis of a Turbulent Thermoacoustic System 10.1 Fractals 10.2 The Hurst exponent and fractal properties 10.3 Multifractals 10.4 Methods of multifractal analysis 10.4.1 Multifractal detrended fluctuation analysis (MFDFA) 10.4.2 Box-counting method 10.5 Combustion noise is multifractal and thermoacoustic instability is a loss of multifractality 10.6 Multifractal analysis during the transition to a flame blowout 10.7 Multifractal analysis of spatial flame structures during stable and unstable operation 10.8 References 11 Complex Network Approach to Thermoacoustic Systems 11.1 An introduction to complex networks 11.2 Measures of complex networks 11.3 Types of complex networks 11.3.1 Regular networks 11.3.2 Random network 11.3.3 Small-world networks 11.3.4 Scale-free networks 11.4 Complex network approach to study temporal dynamics of thermoacoustic systems 11.4.1 Combustion noise is scale-free 11.4.2 The onset of thermoacoustic instability as a transition from scale-free to regular networks 11.4.3 Small-world-like behavior of thermoacoustic instability using cycle network 11.4.4 Recurrence network topologies of different dynamical states of a thermoacoustic system 11.4.5 Directional dependence between the coupled acoustic pressure and heat release rate fluctuations using recurrence networks 11.5 Complex network approach to study spatial dynamics of thermoacoustic systems 11.5.1 Unweighted spatial networks of the time-averaged flow field using the Pearson coefficient 11.5.2 Weighted time-varying spatial networks obtained though acoustic power and vorticity fields 11.5.3 Weighted time-varying turbulence networks obtained though vorticity fields 11.6 References 12 Early Warning and Mitigation Strategies for Thermoacoustic Instability 12.1 Precursors for the onset of impending thermoacoustic instability . . . 418 12.2 Traditional approaches for passive and active controls of thermoacoustic instability 12.3 Control of thermoacoustic instability using methodologies from synchronization theory 12.3.1 Mitigation of thermoacoustic instability using amplitude death phenomenon 12.3.2 Open-loop control of thermoacoustic instability through asynchronous quenching 12.4 Identification of critical regions in the spatial reacting field 12.5 References 13 Oscillatory Instabilities in Other Fluid Systems 13.1 Aeroacoustic instabilities 13.2 Aeroelastic instabilities 13.3 References 14 Summary and Perspective 14.1 Temporal analysis 14.2 Spatiotemporal analysis 14.3 Mitigation Strategies 14.3.1 Evasion 14.3.2 Strategies based on the framework of synchronization theory 14.3.3 Smart passive control 14.4 Future issues 14.5 Final thoughts 14.6 References

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Book SynopsisThis textbook provides a guide to the fundamental principles of acoustics in a straightforward manner using a solid foundation in mathematics and physics. It is designed for those who are new to acoustics and noise control, and includes all the necessary material for a comprehensive understanding of the topic. It is written in lecture-note style and can be easily adapted to an acoustics-related one semester course at the senior undergraduate or graduate level. The book also serves as a ready reference for the practicing engineer new to the application of acoustic principles arising in product design and fabrication.Table of ContentsComplex Numbers for Harmonic Functions.- Solutions of Acoustic Wave Equation.- Derivation of Acoustic Wave Equation.- Acoustic Intensity and Specific Acoustic Impedance.- Solutions of Spherical Wave Equation.- Acoustic Waves from Spherical Sources.- Boundary Conditions and Mode Shapes.- Resonant Cavities and Acoustic Waveguides.- Power Transmission in Pipelines.- Filters and Resonators.- Sound Pressure Levels and Octave Bands.- Room Acoustics.

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Book SynopsisThe book presents topical theoretical and experimental studies for developing advanced methods of detecting materials fracture and assessing their structural state using acoustic emission. It introduces new mathematical models characterizing the displacement fields arising from crack-like defects and establishes a new criterion for classifying different types of materials fracture based on specific parameters obtained from wavelet transforms of acoustic emission signals. The book applies this approach to experimental studies in three types of materials—fiber-reinforced composites, dental materials, and hydrogen-embrittled steels.Table of Contents1 Macrofracture of Structural Materials and Methods of Determining its Type................................................................................................... 1 1.1 Types of Structural Materials Fracture................................................................ 1 1.2 Application of the Acoustic Emission Method to Detect the Fracture of Structural Materials...................................................................... 8 1.3 Detection of Defects by Signals of Magnetoelastic Acoustic Emission ................................................................ 19 1.4 Methods of Spectral Analysis of AE Signals................................................... 21 1.5 Application of Wavelet Transform for Analysis of AE signals........................................................................................... 31 References............................................................................................................................... 43 2 Mathematical Models for Displacement Fields Caused by the Crack in an Elastic Half-Space............................................................................ 61 2.1 Basic Relations of Three-Dimensional Dynamic Problems of the Theory of Elasticity for Bodies with Cracks........................................... 62 2.2 Modeling of Wave Displacements Field on the Half-Space Surface due to Displacement of the Internal Crack Faces............................... 68 References............................................................................................................................ 102 3 Energy Criterion for Identification of the Types of Material Macrofracture............................................................................................. 105 3.1 Methods for Identifying the Types of Macrofracture................................... 105 3.2 Construction of the Energy Criterion.............................................................. 108 3.3 Continuous Wavelet Transform of the AE Signals Emitted under Fracture of Aluminum and its Alloy...................................................... 123 3.4 Specific Features of the Acoustic Emission Signals During Fracture of Aluminum Alloy Welded Joints under Quasi-Static Loading............................................................................................ 130 3.5 AE-identification of the Types of Fracture during Low-Temperature Creep Crack Growth........................................................... 135 3.6 Application of the Wavelet Transform to Study the Features of Non-Metallic Materials Fracture................................................... 140 References............................................................................................................................ 144 vii 4 Evaluation of the Types and Mechanisms of Fracture of Composite Materials According to Energy Criteria...................................... 151 4.1 Specific Features of Macrofracture of the Glass Fiber Reinforced Composites............................................................................ 152 4.2 AE-diagnostics of Fracture of the Aramid Fiber Reinforced Composites............................................................................ 159 References............................................................................................................................ 179 5 Ranking of Dental Materials and Orthopedic Constructions by their Tendency to Fracture.................................................................................. 185 5.1 State-of-the Art of Researches on Mechanical Properties of Dental Materials............................................................................................. 186 5.2 Determination of the Characteristics of Materials for Temporary Fixed Constructions of Dentures...................................................................... 187 5.3 Evaluation of the Types of Dental Polymer Fracture by the Energy Criterion........................................................................................... 199 5.4 Peculiarities of Some Tooth-Endocrown Systems Fracture under Quasi-Static Loading............................................... 205 References............................................................................................................................ 220 6 Rating of Hydrogen Damaging of Steels by Wavelet Transform of Magnetoelastic Acoustic Emission Signals................................. 227 6.1 Some Aspects of Operation the Technical Systems in Hydrogenous Medium................................................................................... 228 6.2 Method for Estimating the Hydrogen Damage of Structural Materials by Wavelet Transform of MAE Signals........................................ 232 6.3 Approbation of the Research Technigue on Specimens of Long-Term Operated Pipe Steels..................................................................... 244 References............................................................................................................................ 255

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Book SynopsisIntroduction: Periodic pulse train and resonance.- Mirror image theory and one-dimensional systems.- Wave equation for spherical waves in coherent sound fields.- Coherent field in rooms: zeros by multiple reflection.- Random sound fields in rooms.- Poles and zeros of power response and driving point impedance of a source in Source signature analysis by modulation envelopes.- Zeros and room transfer functions for incoherent field.-Statistical phase analysis in rooms.

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Book SynopsisAcoustic Behavior vs the Vibrated Strings Concept of Vibration.- Tone Wood Acoustic Identification An Introduction to Mechanical and Acoustic Parameters of Wood.- Components of Wooden Instruments and Their Required Acoustic Characteristics.- Measurement Methods and Devices for Acoustic Parameters.- Tone Wood Acoustic Treatment Introduction  Review of Acoustic and Vibrational Parameters of Wood.- Chemical Wood Treatments.- Non Chemical Wood Treatments.- Sound Color Testing for Treatment Evaluation.

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Book SynopsisPsychoacoustics offers a unique, comprehensive summary of information describing the processing of sound by the human hearing system. The third edition includes an additional chapter on audio-visual interactions and applications, plus more on applications throughout.Table of ContentsStimuli and Procedures.- Hearing Area.- Information Processing in the Auditory System.- Masking.- Pitch and Pitch Strength.- Critical Bands and Excitation.- Just-Noticeable Sound Changes.- Loudness.- Sharpness and Sensory Pleasantness.- Fluctuation Strength.- Roughness.- Subjective Duration.- Rhythm.- The Ear’s Own Nonlinear Distortion.- Binaural Hearing.- Examples of Application.

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Book SynopsisDie 4. Auflage dieses inzwischen als Standardwerk anerkannten Fachbuchs greift wieder aktuelle Probleme bei der Gestaltung von Raum-Akustik, Freifeld-Prüfständen und Kanal-Auskleidungen auf. Zu deren nachhaltiger Lösung werden Materialien und Bauteile sowie Auslegungskonzepte nach neuestem Stand des Wissens allgemein verständlich dargestellt. Aufbauend auf den Grundlagen wird das Konzept vertieft. Mehr als 100 Fallbeispiele zeigen, welche konstruktiven und baulichen Maßnahmen schnell und kostengünstig zum Ziel führen können. Akustiker in der Praxis und Forschung sowie entwerfende und planende Architekten, Bauingenieure und Haustechniker finden neben den Grundlagen und Konzepten besonders auf für bisher vernachlässigten Bereich der tiefen Frequenzen wichtige Hinweise. In Darstellung und Lösung akuter schalltechnischer Probleme stellt der Autor auch neue Erkenntnisse und Konzepte zur Verfügung, bei denen stets das praktisch Nützliche im Vordergrund steht. Für die eingeführten Normen werden Problemlösungen ebenso behandelt wie die Grenzen der Anwendung, wo weiterführende Lösungen gesucht werden. Für Lärmprobleme in Arbeits- und Freizeit-Räumen liefert das Buch eine Fülle konstruktiver Anregungen.Trade Review“… Durch die praxisnahen Darlegungen, zahlreichen Fotos und Diagramme, ist das Buch neben den zuständigen Standardisierungsgremien bei den Normen-Erarbeitungen, auch Tonmeistern und Toningenieuren, Medienregisseure im Audio-Video-Bereich, u. ä. Aufgabenbereichen zu empfehlen, um bei Beratungen zu Korrekturen in Produktions- und Gesellschafts-Räumen eigene Vorstellungen anhand nützlicher Hinweise einbringen zu können. … es ist besonders als täglich zu nutzendes Handbuch für Architekten und Sauingenieure dringend, geradezu als pflichtlektüre, zu empfehlen ...” (Gerhard Steinke, in: MEDIA BIZ, Heft 226, November 2017)“... bemerkenswerten Beispielen für die akustische Gestaltung größerer Raume aus der Beratungspraxis … empfiehlt sich das Buch als eine wertvolle und ausführliche Arbeitsunterlage mit vielen Anregungen für akustische Berater, aber auch als eine wichtige Informationsgrundlage für (nichtakustische!) Entscheidungsträger.” (Jürgen Meyer, in: DEGA-Sprachrohr, Heft 74, Oktober 2017)Table of ContentsEinführung.- Problemschwerpunkt tiefe Frequenzen.- Grundlagen für den Lärmschutz und die raumakustische Gestaltung.- Passive Absorber.- Platten-Resonatoren.- Helmholtz-Resonatoren.- Interferenz-Dämpfer.- Absorber mit aktiven Komponenten.- Mikroperforierte Absorber.- Integrierte und integrierende Schallabsorber.- Raumakustische Grundlagen für größere Räume.- Fallbeispiele akustischer Gestaltung größerer Räume.- Raumakustische Grundlagen für kleinere Räume.- Fallbeispiele akustischer Gestaltung kleinerer Räume.- Raumakustische Grundlagen für schalltechnische Prüfstände.- Fallbeispiele alternativer Gestaltung von Akustik-Prüfständen.- Grundlagen für Schalldämpfer in Strömungskanälen.- Fallbeispiele alternativer Schalldämpferanlagen.

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Book SynopsisThis book highlights the advantages of the vector-phase method in underwater acoustic measurements and presents results of theoretical and experimental studies of the deep open ocean and shallow sea based on vector-phase representations. Based on the physical phenomena discovered and compensation of counter streams of energy and vortices of the acoustic intensity vector, processes of transmitting acoustic energy of a tonal signal in the real ocean are described. The book also discusses the development of advanced detection tools based on vector-phase sonar. This book provides useful content for professionals and researchers working in various fields of applied underwater acoustics.Table of ContentsChapter one: VECTOR REPRESENTATION OF AN ACOUSTIC FIELD Chapter two: THEORY AND TECHNIQUE OF VECTOR-PHASE UNDERWATER ACOUSTIC MEASUREMENTS Chapter three: PHENOMENON OF COMPENSATION FOR THE INTENSITY OF ENERGY COUNTER CURRENTS Chapter four: VORTICES OF THE ACOUSTIC INTENSITY VECTOR IN A SHALLOW SEA WAVEGUIDE Chapter five: EXAMINATION OF A WEAK SIGNAL IN A DIFFUSE, PARTIALLY COHERENT, AND COHERENT ACOUSTIC NOISE FIELD Chapter six: VECTOR-PHASE EXPERIMENTAL TECHNIQUE. EXPEDITIONS. CONFERENCES APPENDIX I: MONOCHROMATIC ACOUSTIC FIELD BASIC RELATIONS APPENDIX II: FOURTH STATISTICAL MOMENT OF ACOUSTIC VECTOR FIELD APPENDIX III: A LIST OF SOME GENERAL PUBLICATIONS (PATENTS AND ARTICLES) ON THE SUBJECT OF VECTORS​

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Book SynopsisThis book is the first volume of the bioacoustics series published by the Society for Bioacoustics. This volume provides an overview of the advances and recent topics in acoustic communication in various animals. Most animals produce vibrations and sounds by moving their body parts, including vocal organs. These sounds can be research targets of bioacoustics studies. How animals use these sounds, especially in inter-individual relationships, is the focus of this volume, “Acoustic Communication in Animals”. The authors’ expertise varies from molecular biology, neurobiology to psychology, and human brain imaging. Their research subjects range from invertebrates to humans. Despite the variety of topics, chapters are developed under the consideration of ethology and evolution. Readers will recognize the profundity of the topics in each chapter. In addition, the view and understanding of natural sound sequences produced by animals can vary among different cultures. Research from Japan and regions that have been underrepresented in previous literature can offer new ideas and unique perspectives in the study of bioacoustics. Readers can grasp the progress of this research field in a broad range of species in one book. The book presents multi- and interdisciplinary topics and appeals to researchers and students in fields including psychology, physiology, zoology, ethology, and neurosciences.Table of ContentsChapter 1. Using knowledge about human vocal behaviour to understand acoustic communication in animals and the evolution of language and musicChapter 2. Acoustic communication in fruit flies and mosquitoesChapter 3. Multiple functions of ultrasonic courtship song in mothsChapter 4. Recent progress in studies on acoustic communication of cricketsChapter 5. Vocal imitation, a specialized brain function that facilitates cultural transmission in songbirdsChapter 6. Dancing in singing songbirds: Choreography in Java sparrowsChapter 7. Vocal communication in corvids: who emits, what information and benefits?Chapter 8. Affiliation, synchronization, and rhythm production by birdsChapter 9. Cockatiels: a research subject for studying capability for music productionChapter 10. Acoustic properties and biological significance of ultrasonic vocalizations in rodents: emotional expressionsChapter 11. Effects of acoustic interference on the echolocation behavior of batsChapter 12. Diverse sound use and sensitivity in auditory communication by chimpanzees (Pan troglodytes)Chapter 13. The Interplay among the linguistic environment, language perception, and production in children’s language-specific developmentChapter 14. Sound processing in the auditory periphery: toward speech communication and music comprehension

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Book SynopsisA comprehensive and accessible textbook on ocean acoustics and acoustical oceanography for students in oceanography, ocean engineering, and ocean physics, and a reference for researchers and professionals. The first nine chapters provide the basic tools, and the following fifteen chapters, by many of the world's most successful ocean researchers, introduce modern developments.Trade Review'Herman Medwin died in January 2006 at the age of 85. This book acts magnificently as a memorial to him … The ascribed multiple authorship of this volume … stands as a telling testament to this influence … it is clearly written, and each chapter is provided with a range of problems which may be used to assess how well the presented material has been assimilated … a useful introduction to non-linear effects such as parametric generation, acoustic streaming and the characteristics of explosive sources … This is a magnificent book, a worthy occupant of shelf space in any oceanographic library.' The Magazine of the Challenger Society for Marine ScienceTable of ContentsAcknowledgements; About the authors; Preface; Part I. Fundamentals Herman Medwin: 1. Sound propagation in a simplified sea; 2. Transmission and attenuation along sound paths; 3. Sound sources and receivers; 4. Intense sounds: non-linear phenomena; 5. Interpreting ocean sounds; 6. Sound radiated or scattered by prototype marine bodies and bubbles; 7. Ocean bio-acoustics; 8. Ocean waveguides, rough surfaces, barriers, escarpments, and seamounts; 9. Scatter and transmission at ocean surfaces; Part II. Studies of the Near Surface Ocean: 10. Acoustical studies of the upper ocean boundary layer David M. Farmer; 11. Using underwater sound to measure raindrop size distribution Jeffrey A. Nystuen; Part III. Bio-Acoustical Studies: 12. Active acoustical assessment of plankton and micronekton D. Vance Holliday and Timothy K. Stanton; 13. Models, measures, and visualizations of fish backscatter John K. Horne and Josef M. Jech; 14. Bioacoustic absorption spectroscopy: a new approach to monitoring the number and lengths of fish in the ocean Orest Diachok; 15. Passive acoustics as a key to the study of marine animals Douglas H. Cato, Michael J. Noad and Rob McCauley; 16. The acoustical causes of collisions between marine mammals and vessels Edmund R. Gerstein and Joseph E. Blue; 17. Whale monitoring Ching-Sang Chiu and Christopher W. Miller; Part IV. Studies of Ocean Dynamics: 18. Ocean acoustic tomography Robert Spindel; 19. Acoustic time reversal in the ocean David R. Dowling and Heechun Song; 20. Studies of turbulent processes using Doppler and acoustic scintillation techniques Daniela Di Iorio and Anne Gargett; 21. Very high frequency coastal acoustics T. G. Leighton and Gary J. Heald; Part V. Studies of the Ocean Bottom: 22. Acoustical imaging of deep ocean hydrothermal flows David Palmer and Peter Rona; 23. Remotely imaging underwater mountain ranges in minutes Nicholas Makris; 24. Acoustic remote sensing of the sea bed using propeller noise from a light aircraft Michael Buckingham.

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