Springer-AAS Acoustics Series – serie

This book examines the diagnostic usefulness of otoacoustic emissions (OAEs) in the context of theoretical cochlear mechanics. OAEs have proven to be immensely useful for diagnostic purposes. The phenomenology of hearing physiology, and OAEs in particular, is briefly summarized, providing the necessary references to the literature. State-of-the-art linear and nonlinear mathematical models of the cochlea are discussed, using fundamental concepts of fluid dynamics and mechanics of vibrating systems, often exploiting the formal analogy between mechanical and electric linear systems. In particular, it is explained how the theoretical predictions about the OAE level, phase, and nonlinear I/O functions allow one to design advanced acquisition and analysis tools that significantly improve the specificity and sensitivity of OAEs to hearing dysfunction and other important physiological effects. Examples of diagnostic applications of OAEs in audiology, neurology, and space physiology are discussed, with all of the information needed to develop an OAE experiment provided, from instrument and acquisition setup to signal analysis and theoretical interpretation. The book is targeted at graduate students and researchers in hearing science with at least a basic knowledge of classical physics, calculus, Fourier analysis and signal analysis.

This book examines the diagnostic usefulness of otoacoustic emissions (OAEs) in the context of theoretical cochlear mechanics. OAEs have proven to be immensely useful for diagnostic purposes. The phenomenology of hearing physiology, and OAEs in particular, is briefly summarized, providing the necessary references to the literature. State-of-the-art linear and nonlinear mathematical models of the cochlea are discussed, using fundamental concepts of fluid dynamics and mechanics of vibrating systems, often exploiting the formal analogy between mechanical and electric linear systems. In particular, it is explained how the theoretical predictions about the OAE level, phase, and nonlinear I/O functions allow one to design advanced acquisition and analysis tools that significantly improve the specificity and sensitivity of OAEs to hearing dysfunction and other important physiological effects. Examples of diagnostic applications of OAEs in audiology, neurology, and space physiology are discussed, with all of the information needed to develop an OAE experiment provided, from instrument and acquisition setup to signal analysis and theoretical interpretation. The book is targeted at graduate students and researchers in hearing science with at least a basic knowledge of classical physics, calculus, Fourier analysis and signal analysis.

This book highlights the mathematical, physical, and technical properties of moving acoustic sources. Authors consider point sources and infinite or finite line sources moving along various curves in three-dimensional space. After studying the general theory of such sources, the frequency spectrum and the associated Doppler shift are derived explicitly for different trajectories. The sound radiation in half-spaces with a locally reacting and homogeneous ground is investigated in detail based on the knowledge of closed-form solutions for the stationary impulse response. An important field of application is the localization of moving sources. Among other approaches, an equivalent source method in the time domain is used to develop an effective source localisation method. Important practical applications are explored with these techniques, e.g. the detection of noise sources from trains and airplanes.The research results published in this book are mainly obtained within the three-year project “Localization and identification of moving noise sources” funded by the German Research Foundation.​

This book highlights the mathematical, physical, and technical properties of moving acoustic sources. Authors consider point sources and infinite or finite line sources moving along various curves in three-dimensional space. After studying the general theory of such sources, the frequency spectrum and the associated Doppler shift are derived explicitly for different trajectories. The sound radiation in half-spaces with a locally reacting and homogeneous ground is investigated in detail based on the knowledge of closed-form solutions for the stationary impulse response. An important field of application is the localization of moving sources. Among other approaches, an equivalent source method in the time domain is used to develop an effective source localisation method. Important practical applications are explored with these techniques, e.g. the detection of noise sources from trains and airplanes.The research results published in this book are mainly obtained within the three-year project “Localization and identification of moving noise sources” funded by the German Research Foundation.​

This open access book highlights the negative and positive health effects of chronic exposure to environmental sound. It describes the state of the art in the field from a public health point of view and puts it in a broad societal perspective looking at sound from physical, social, psychological, economic and governance angles. Rather than a mere collection of papers around the theme as usually provided in special issues, this book offers a comprehensive look at the meaning of sound in society and its impacts and provides directions to further advance the field.

This open access book highlights the negative and positive health effects of chronic exposure to environmental sound. It describes the state of the art in the field from a public health point of view and puts it in a broad societal perspective looking at sound from physical, social, psychological, economic and governance angles. Rather than a mere collection of papers around the theme as usually provided in special issues, this book offers a comprehensive look at the meaning of sound in society and its impacts and provides directions to further advance the field.

This book highlights the range of issues involved in designing interior spaces for acoustics—that is, ensuring that the sound of a space matches its function. The book presents the principles of acoustic design, together with practical advice on how to apply those principles. The fundamental elements of background sound, intruding sound, sound quality, and speech intelligibility are each described, with design goals, calculation procedures, and advice on implementation. Contemporary challenges associated with integrating acoustics and sustainable building design are also covered. Finally, two types of space—school classrooms and hospital wards—are considered in detail, as examples.

This book highlights the range of issues involved in designing interior spaces for acoustics—that is, ensuring that the sound of a space matches its function. The book presents the principles of acoustic design, together with practical advice on how to apply those principles. The fundamental elements of background sound, intruding sound, sound quality, and speech intelligibility are each described, with design goals, calculation procedures, and advice on implementation. Contemporary challenges associated with integrating acoustics and sustainable building design are also covered. Finally, two types of space—school classrooms and hospital wards—are considered in detail, as examples.

The book presents theoretical and experimental studies to establish the relationship between volume jumps of the 90° domain wall in a ferromagnetic material and the magnitude of the half-space surface displacement caused by it. A method of evaluating the influence of the external magnetic field on the stress intensity factor at the tip of the crack-like defects in ferromagnets is discussed. The influence of hydrogen on the generation of magneto-elastic acoustic emission signals of ferromagnets is described. The features of magneto-elastic acoustic emission due to the presence of plastic deformation, structural changes, and volumetric damage in such structural materials are shown.