[PDF] Temporal Resolution And Voice Onset Time Perception In Sensorineural Hearing Loss eBook

Author : Walt Jesteadt
Publisher : Routledge
Page : 731 pages
File Size : 34,96 MB
Release : 2019-01-04
Category : Education
ISBN : 1317729374

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A recent study indicates that 20 million people in the United States have significant sensorineural hearing loss. Approximately 95% of those people have partial losses, with varying degrees of residual hearing. These percentages are similar in other developed countries. What changes in the function of the cochlea or inner ear cause such losses? What does the world sound like to the 19 million people with residual hearing? How should we transform sounds to correct for the hearing loss and maximize restoration of normal hearing? Answers to such questions require detailed models of the way that sounds are processed by the nervous system, both for listeners with normal hearing and for those with sensorineural hearing loss. This book contains chapters describing the work of 25 different research groups. A great deal of research in recent years has been aimed at obtaining a better physiological description of the altered processes that cause sensorineural hearing loss and a better understanding of transformations that occur in the perception of those sounds that are sufficiently intense that they can still be heard. Efforts to understand these changes in function have lead to a better understanding of normal function as well. This research has been based on rigorous mathematical models, computer simulations of mechanical and physiological processes, and signal processing simulations of the altered perceptual experience of listeners with sensorineural hearing loss. This book provides examples of all these approaches to modeling sensorineural hearing loss and a summary of the latest research in the field.

Author : Nina Kraus
Publisher : Springer
Page : 306 pages
File Size : 34,99 MB
Release : 2017-01-09
Category : Medical
ISBN : 331947944X

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This volume will cover a variety of topics, including child language development; hearing loss; listening in noise; statistical learning; poverty; auditory processing disorder; cochlear neuropathy; attention; and aging. It will appeal broadly to auditory scientists—and in fact, any scientist interested in the biology of human communication and learning. The range of the book highlights the interdisciplinary series of questions that are pursued using the auditory frequency-following response and will accordingly attract a wide and diverse readership, while remaining a lasting resource for the field.

Author :
Publisher : ScholarlyEditions
Page : 76 pages
File Size : 14,81 MB
Release : 2013-07-22
Category : Medical
ISBN : 1481655752

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Sensorineural Hearing Loss: New Insights for the Healthcare Professional: 2013 Edition is a ScholarlyBrief™ that delivers timely, authoritative, comprehensive, and specialized information about Genetics in a concise format. The editors have built Sensorineural Hearing Loss: New Insights for the Healthcare Professional: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Genetics in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Sensorineural Hearing Loss: New Insights for the Healthcare Professional: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Author : Andrew Barnabas John
Publisher :
Page : pages
File Size : 23,60 MB
Release : 2007
Category :
ISBN :

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These findings suggest a need for re-evaluation of the temporal resolution task and establishment of age- and hearing-loss-appropriate normative values.

Author : Department of Health and Human Services
Publisher : Createspace Independent Publishing Platform
Page : 122 pages
File Size : 32,11 MB
Release : 2014-02-19
Category : Technology & Engineering
ISBN : 9781496001597

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In the Occupational Safety and Health Act of 1970, Congress declared that its purpose was to assure, so far as possible, safe and healthful working conditions for every working man and woman and to preserve our human resources. In this Act, the National Institute for Occupational Safety and Health (NIOSH) is charged with recommending occupational safety and health standards and describing exposure concentrations that are safe for various periods of employment-including but not limited to concentrations at which no worker will suffer diminished health, functional capacity, or life expectancy as a result of his or her work experience. By means of criteria documents, NIOSH communicates these recommended standards to regulatory agencies (including the Occupational Safety and Health Administration [OSHA]) and to others in the occupational safety and health community. Criteria documents provide the scientific basis for new occupational safety and health standards. These documents generally contain a critical review of the scientific and technical information available on the prevalence of hazards, the existence of safety and health risks, and the adequacy of control methods. In addition to transmitting these documents to the Department of Labor, NIOSH also distributes them to health professionals in academic institutions, industry, organized labor, public interest groups, and other government agencies. In 1972, NIOSH published Criteria for a Recommended Standard: Occupational Exposure to Noise, which provided the basis for a recommended standard to reduce the risk of developing permanent hearing loss as a result of occupational noise exposure [NIOSH 1972]. NIOSH has now evaluated the latest scientific information and has revised some of its previous recommendations. The 1998 recommendations go beyond attempting to conserve hearing by focusing on preventing occupational noise-induced hearing loss (NIHL). This criteria document reevaluates and reaffirms the recommended exposure limit (REL) for occupational noise exposure established by the National Institute for Occupational Safety and Health (NIOSH) in 1972. The REL is 85 decibels, A-weighted, as an 8-hr time-weighted average (85 dBA as an 8-hr TWA). Exposures at or above this level are hazardous. By incorporating the 4000-Hz audiometric frequency into the definition of hearing impairment in the risk assessment, NIOSH has found an 8% excess risk of developing occupational noise-induced hearing loss (NIHL) during a 40-year lifetime exposure at the 85-dBA REL. NIOSH has also found that scientific evidence supports the use of a 3-dB exchange rate for the calculation of TWA exposures to noise. The recommendations in this document go beyond attempts to conserve hearing by focusing on prevention of occupational NIHL. For workers whose noise exposures equal or exceed 85 dBA, NIOSH recommends a hearing loss prevention program (HLPP) that includes exposure assessment, engineering and administrative controls, proper use of hearing protectors, audiometric evaluation, education and motivation, recordkeeping, and program audits and evaluations. Audiometric evaluation is an important component of an HLPP. To provide early identification of workers with increasing hearing loss, NIOSH has revised the criterion for significant threshold shift to an increase of 15 dB in the hearing threshold level (HTL) at 500, 1000, 2000, 3000, 4000, or 6000 Hz in either ear, as determined by two consecutive tests. To permit timely intervention and prevent further hearing losses in workers whose HTLs have increased because of occupational noise exposure, NIOSH no longer recommends age correction on individual audiograms.

Author : Feipeng Li
Publisher :
Page : pages
File Size : 49,79 MB
Release : 2010
Category :
ISBN :

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This research investigates the impact of various types of cochlear hearing loss and mask- ing noise on the perception of basic speech sounds based on the information of identified speech cues. A psychoacoustic method, named three-dimensional deep search (3DDS), is developed to identify the perceptual cues of consonant sounds in natural speech. Unlike the conventional method of synthetic speech, which requires a prior hypothesis about the acoustic cues to generate the speech stimuli, the 3DDS measures the contribution of each subcomponent to speech perception as a function of time, frequency and intensity, without making any tacit assumptions about the speech cues to be identified. Using the 3DDS, we discovered that natural speech often contains conflicting cues that are characteristic of confusable sounds. For instance, a normal /ka/, dominated by a mid-frequency burst at 10́32 kHz, may also have an inaudible /ta/ burst above 3 kHz that promotes the /ka/6́2/ta/ confusion under noisy environments. Removal of the /ka/ burst may turn the sound into a solid /ta/. More than a dozen hearing-impaired ears were tested on consonant identification in noise. While the deterioration in performance for flat mild-to-moderate hearing loss can be well predicted by the loss of audibility, subjects with other types of hearing loss often show patterns of difficult sounds that can hardly be explained by the shift of hearing threshold. A subject with almost identical binaural hearing loss is nearly deaf to /ka/ in one ear due to a mid-frequency cochlear dead region. Among the 18 /ka/s produced by different talkers, the subject can only hear one /ka/ at an accuracy of 80% and three other /ka/s at 200́340%. Most /ka/s are highly confused with /ta/ because the subject is listening to the conflicting /ta/ burst in the high-frequency. The /ka/6́2/ta/ confusion is significantly reduced when the conflicting cue is removed. NAR-L improves the average score by 10%, but it may degrade a few consonants under certain circumstances.

Author : Michael Valente
Publisher : Thieme
Page : 412 pages
File Size : 12,61 MB
Release : 2011-01-01
Category : Medical
ISBN : 160406613X

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This current and expanded edition of a bestselling text is divided into four sections, organized to follow the sequence in which decisions are made regarding hearing aid fittings, and featuring new chapters on middle ear implants, hearing aid counseling, and infection control. Other chapters have been revised to reflect the latest developments in the field, such as: improving speech recognition with directional microphones; changing standards for measuring real-ear performance; and new prescriptive procedures for severe hearing loss. The text features contributions from internationally renowned experts in the field who share their extensive knowledge and clinical experience. It covers the six most common forms of hearing loss practitioners will encounter in their own practice—noise-induced, symmetrical, asymmetrical, unilateral, conductive, and severe hearing loss—with instructions on applying the newest technology to each hearing impaired group. Key features: Addresses the six most common types of hearing loss that comprise 90-95% of the situations audiologists encounter daily Organized to follow the decision-making progress in selecting and verifying hearing aid fittings Fully updated with state-of-the-art technology on implantable hearing aids, directional microphones, and more A valuable glossary of terms at the end of the text—helpful for students and specialists alike Together with its updated companion text, HEARING AIDS: STANDARDS, OPTIONS, AND LIMITATIONS, this book forms the basis of a complete reference library on selecting, ordering, measuring, and verifying hearing aid fittings and performance.

Author : Gastone G. Celesia
Publisher : Elsevier
Page : 723 pages
File Size : 44,70 MB
Release : 2015-03-06
Category : Medical
ISBN : 0444626298

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The Human Auditory System: Fundamental Organization and Clinical Disorders provides a comprehensive and focused reference on the neuroscience of hearing and the associated neurological diagnosis and treatment of auditory disorders. This reference looks at this dynamic area of basic research, a multidisciplinary endeavor with contributions from neuroscience, clinical neurology, cognitive neuroscience, cognitive science communications disorders, and psychology, and its dramatic clinical application. A focused reference on the neuroscience of hearing and clinical disorders Covers both basic brain science, key methodologies and clinical diagnosis and treatment of audiology disorders Coverage of audiology across the lifespan from birth to elderly topics