Towards a Model of Electric-acoustic Stimulation in Cochlear Implant Subjects with Residual Hearing PDF Download

Author: Daniel Alrutz
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Blake Wilson
Publisher: Plural Publishing
ISBN: 1597566284
Category : Medical
Languages : en
Pages : 481

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Book Description
Better Hearing with Cochlear Implants provides a comprehensive account of a decades-long research effort to improve cochlear implants (CIs). The research was conducted primarily at the Research Triangle Institute (RTI) in North Carolina, USA, and the results provided key pillars in the foundation for the present-day devices. Although many of these results were reported in journal articles and other publications, many others were only reported in Quarterly and Final Progress Reports for the National Institutes of Health, which supported the RTI effort. In addition, the Progress Reports provided details that could not be included in the publications. The book is an annotated compilation of the most important sections from the most important reports that gives readers access to previously unpublished data and also a broad and logically organized overview of the research. Four main sections are included to describe the major lines of investigation: design and evaluation of novel processing strategies; electrical stimulation on both sides with CIs; combined electric and acoustic stimulation of the auditory system; and representations of temporal information with CIs. Large advances were made in each of these areas, and readers will appreciate the significance of the research and how the different areas related to each other. Each main section includes an introduction by the authors followed by two or more chapters, and the first chapter in the book describes the work conducted at the RTI in the context of the multiple other efforts worldwide. The book may be used as a primary text on CIs, and it can serve as a multifaceted reference for physicians, audiologists, neuroscientists, designers of neural prostheses, and scientists and other specialists whose work is aimed at the remediation of hearing loss. In all, a fascinating history is presented, which began with little or no speech recognition with CIs for any user and ended with high levels of speech recognition for the great majority of users, including the ability to converse with ease via cell phones. This is a long trip in a short time, and historians of science and technological developments will be interested in knowing how such a rapid development was possible, and about the twists and turns on the way to the destination.

Author: Paul van de Heyning
Publisher: Karger Medical and Scientific Publishers
ISBN: 3805592868
Category : Medical
Languages : en
Pages : 165

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Book Description
Electric acoustic stimulation (EAS) combines electric stimulation in the mid- to high-frequency regions with acoustic stimulation in the low-frequency range with the aim to preserve residual low-frequency hearing after cochlear implantation, which together particularly improves speech understanding, pitch discrimination and music appreciation.In this volume, the most experienced clinical groups share their understanding of the use of EAS in adults and children. It offers an in-depth audiological analysis related to selecting, preparing and rehabilitating EAS patients. Topics such as dead zone assessment, psychophysics of low-frequency hearing, electric-acoustic interaction, speech algorithms, music perception, as well as fitting and the patient's acceptance are discussed. Introductory chapters - illustrated with exceptional colour images - on cochlear neural reserves, molecular biology and high-technological electrode development focus on the basic scientific EAS research. Every ENT specialist, audiologist, speech therapist and scientist interested in inner ear pathology, involved in cochlear implantation or dealing with the treatment or surgery of the inner ear will benefit from the insights and experiences of the world's leading experts who contributed to this publication.

Author: Joseph M. Miller
Publisher: Springer Science & Business Media
ISBN: 1461232562
Category : Medical
Languages : en
Pages : 416

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This volume describes a new direction in technological and biomedical developments for profoundly deaf individuals. The first section covers topics of tissue characteristics, such as responses to electrical stimulation and computer modelling of cochlea currents. Perception of acoustic signals, responses and behavioral pattern as well as psychophysical aspects are treated in the second part. Part III is addressed to perspectives and challenges of encoding schemes. Reports on studies of acoustic and electrical encoding of temporal information, speech features with cochlear implants as well as psychophysical and speech perceptual studies will allow further strategies for cochlea implants.

Author: Hsin-I. Yang
Publisher:
ISBN: 9781303001086
Category :
Languages : en
Pages : 57

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Book Description
Recognition of speech in quiet is relatively easy for cochlear implant subjects. However, recognition of melody in quiet or speech in noise is difficult due to insufficient encoding of spectral fine structure in contemporary cochlear implants. Introducing low-frequency acoustic fine structure by means of a hearing aid in addition to a cochlear implant has become an effective treatment option for people with moderate-to-severe hearing loss. The combined electro-acoustic stimulation can improve cochlear implant performance in recognition tasks that require resolving low-order harmonics in a stimulus. In addition, performance of the combined stimulation depends upon the efficiency of integrating information from two different modalities. The first part of the dissertation employed a unique stimulus paradigm of concurrent vowels, in which temporal glimpsing and high-level contextual cues were minimized, to measure the efficiency of information integration between acoustic and electric stimulation in actual electro-acoustic subjects. The integration efficiency in actual subjects was generally lower than that in simulated normal-hearing subjects. The actual integration efficiency was also highly variable but was significantly correlated with the amount of low-frequency residual acoustic hearing in the non-implanted ear. The second part of the dissertation used Mandarin, a tonal language, to evaluate the electro-acoustic stimulation benefit and information extraction in actual Mandarin-speaking subjects who used a cochlear implant and a hearing aid in the contralateral ear. Significant benefit of the combined stimulation was found in Mandarin speech recognition in noise and was significantly correlated with the amount of low-frequency residual hearing. The present dissertation suggests that the amount of residual acoustic hearing be considered in the future management of hearing impairment and design of auditory prostheses.

Author: Klaus Böheim
Publisher: Karger Medical and Scientific Publishers
ISBN: 3805594704
Category : Medical
Languages : en
Pages : 95

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Book Description
In recent years, methods for coupling active implants to the middle ear, round window or combinations of passive middle ear prostheses have progressed considerably. Patient selection criteria have expanded from purely sensorineural hearing losses to conductive and mixed hearing losses in difficult-to-treat ears. This book takes into consideration recently developed methods as well as devices in current use. It begins with a fascinating and authentic history of active middle ear implants, written by one of the main pioneers in the field. In the following chapters, leading scientists and clinicians discuss the relevant topics in otology and audiology. Treatments for sensorineural hearing loss, conductive and mixed hearing losses, and results on alternative coupling sites such as the stapes footplate and the oval window are also covered, as well as articles on candidacy and cost-effectiveness. This publication is a must for ENT professionals and surgeons seeking out the latest knowledge on current research and clinical applications of active middle ear implants for all types of hearing loss.

Author: David S Haynes
Publisher: JP Medical Ltd
ISBN: 178779119X
Category : Medical
Languages : en
Pages : 265

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Book Description
A cochlear implant is a surgically implanted electronic device that provides a sense of sound to a person who has a severe or profound hearing loss. A cochlear implant does not cure deafness or hearing impairment, but is a prosthetic substitute which directly stimulates the cochlea. There are over 250,000 users worldwide with 12,000 in the UK. This book is a multidisciplinary guide to cochlear implantation in children and adults with sensorineural hearing loss (where the root cause lies in the inner ear or sensory organ, ie the cochlear and associated organs). Beginning with discussion on the aetiology of hearing loss and assessment of cochlear implant candidacy, the next chapter discusses preoperative cochlear implant imaging. Each of the following sections provides in depth coverage of different types of cochlear implantation and their potential outcomes. The final sections examine miscellaneous topics such as music perception in cochlear implantation, drug eluting electrodes, cost effectiveness, and reliability reporting. Authored by internationally recognised, US-based specialists, the text is further enhanced by clinical and surgical photographs and illustrations. Key points Multidisciplinary guide to cochlear implantation in children and adults Covers different types of cochlear implant and potential outcomes Includes miscellaneous topics such as music perception, drug eluting electrodes, and reliability reporting Internationally recognised, US-based author team

Author: Attila Fráter
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Sandra DeSaSouza
Publisher: Springer Nature
ISBN: 9811904529
Category : Medical
Languages : en
Pages : 518

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This book is a comprehensive illustration of content covering cochlear implants' past, present, and future perspectives. It delves into history, about how the first implant was conceived around 50 years ago and how modern cochlear implants provide better hearing and speech discrimination with the evolution of technology. This book discusses the basic working principles of cochlear implants, along with a review of their clinical use. The book also elaborates upon the various surgical techniques authored by clinicians who are pioneers. This book covers various important topics such as implantation in abnormal cochleas, bilateral implantation, implanting with acoustic and electric stimulation, and re-implantation. The book guides selecting the suitable candidates, describing preoperative evaluation and imaging techniques. This book will be an invaluable source of guidance for ENT surgeons, Audiologists, and Neurologists, along with undergraduate and postgraduate students in Audiology and ENT.

Author: Johannes Benjamin Krüger
Publisher:
ISBN: 9783843953627
Category :
Languages : en
Pages : 0

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