Millions of Americans experience some degree of hearing loss. The Social Security Administration (SSA) operates programs that provide cash disability benefits to people with permanent impairments like hearing loss, if they can show that their impairments meet stringent SSA criteria and their earnings are below an SSA threshold. The National Research Council convened an expert committee at the request of the SSA to study the issues related to disability determination for people with hearing loss. This volume is the product of that study. Hearing Loss: Determining Eligibility for Social Security Benefits reviews current knowledge about hearing loss and its measurement and treatment, and provides an evaluation of the strengths and weaknesses of the current processes and criteria. It recommends changes to strengthen the disability determination process and ensure its reliability and fairness. The book addresses criteria for selection of pure tone and speech tests, guidelines for test administration, testing of hearing in noise, special issues related to testing children, and the difficulty of predicting work capacity from clinical hearing test results. It should be useful to audiologists, otolaryngologists, disability advocates, and others who are concerned with people who have hearing loss.

The major aim of this book is to introduce the ways in which scientists approach and think about a phenomenon -- hearing -- that intersects three quite different disciplines: the physics of sound sources and the propagation of sound through air and other materials, the anatomy and physiology of the transformation of the physical sound into neural activity in the brain, and the psychology of the perception we call hearing. Physics, biology, and psychology each play a role in understanding how and what we hear. The text evolved over the past decade in an attempt to convey something about scientific thinking, as evidenced in the domain of sounds and their perception, to students whose primary focus is not science. It does so using a minimum of mathematics (high school functions such as linear, logarithmic, sine, and power) without compromising scientific integrity. A significant enrichment is the availability of a compact disc (CD) containing over 20 examples of acoustic demonstrations referred to in the book. These demonstrations, which range from echo effects and filtered noise to categorical speech perception and total more than 45 minutes, are invaluable resources for making the text come alive.

This book presents a clear and precise treatment of the physics of sound while using a level of math suitable for readers in the speech, language, hearing and health sciences. Simple mathematics, graphics, and qualitative descriptions are demonstrated to explain wave concepts, spectrograms, intensity, and decibels.

Featuring an exciting new chapter on several aspects of speech acoustics by Raymond D. Kent, PhD! With a new chapter, the classic textbook, Introduction to Sound: Acoustics for the Hearing and Speech Sciences, is back in a fifth edition and continues its aim to teach fundamental concepts of acoustics to students in communication sciences and disorders and related disciplines. Students of speech-language-hearing science must have a thorough understanding of the elements of acoustics before they can successfully embark on more advanced study of both normal and disordered human communication. The text is known for how acoustical concepts have been made understandable for all students, not just those who are already grounded in mathematics and physics. Coverage includes the nature of sound waves, simple harmonic motion, acoustic impedance, scales of measure, logarithms and antilogarithms, sound intensity and pressure, complex waves, resonance and filtering, distortion, sound transmissions, speech acoustics, and room acoustics. Key Features: * Summaries, Notes, and Practice Problems end each chapter * Bolded key terms throughout with end-of-book glossary * Alphabetical listing of selected equations * The numerous equations are displayed in blue for easier reading New to the Fifth Edition: * A new chapter, Basic Principles of Speech Acoustics, written by Raymond D. Kent, PhD * A special emphasis on editing the content throughout for increased readability and comprehension Please note: Ancillary content such as practice problems and acoustic animations are not included as in the original print version of this work.

Presents a clear and precise treatment of the physics of sound while using a level of math suitable for readers in the speech, language, hearing, and health sciences. Simple mathematics, graphics, and qualitative descriptions are demonstrated to explain wave concepts, spectrograms, intensity and decibels. concepts are applied to the physics of speech and hearing, providing students with an understanding of the science of sound.

The major aim of this book is to introduce the ways in which scientists approach and think about a phenomenon -- hearing -- that intersects three quite different disciplines: the physics of sound sources and the propagation of sound through air and other materials, the anatomy and physiology of the transformation of the physical sound into neural activity in the brain, and the psychology of the perception we call hearing. Physics, biology, and psychology each play a role in understanding how and what we hear. The text evolved over the past decade in an attempt to convey something about scientific thinking, as evidenced in the domain of sounds and their perception, to students whose primary focus is not science. It does so using a minimum of mathematics (high school functions such as linear, logarithmic, sine, and power) without compromising scientific integrity. A significant enrichment is the availability of a compact disc (CD) containing over 20 examples of acoustic demonstrations referred to in the book. These demonstrations, which range from echo effects and filtered noise to categorical speech perception and total more than 45 minutes, are invaluable resources for making the text come alive.

The field of spatial hearing has exploded in the decade or so since Jens Blauert's classic work on acoustics was first published in English. This revised edition adds a new chapter that describes developments in such areas as auditory virtual reality (an important field of application that is based mainly on the physics of spatial hearing), binaural technology (modeling speech enhancement by binaural hearing), and spatial sound-field mapping. The chapter also includes recent research on the precedence effect that provides clear experimental evidence that cognition plays a significant role in spatial hearing.The remaining four chapters in this comprehensive reference cover auditory research procedures and psychometric methods, spatial hearing with one sound source, spatial hearing with multiple sound sources and in enclosed spaces, and progress and trends from 1972 (the first German edition) to 1983 (the first English edition) -- work that includes research on the physics of the external ear, and the application of signal processing theory to modeling the spatial hearing process. There is an extensive bibliography of more than 900 items.