Download or read book Methods for Robust Characterization of Consonant Perception in Hearing impaired Listeners written by Woojae Han and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Individuals with {it sensorineural hearing loss} (SNHL) are prescribed hearing aids and/or a cochlear implant, based on their pure-tone threshold and speech perception scores. Although these assistive listening devices do help these individuals communicate in quiet surroundings, many still have difficulty understanding speech in noisy environments. Especially, listeners with mild-to-moderate SNHL have complained that their hearing aids do not provide enough benefit to facilitate understanding of normal speech. Why is it that the modern hearing aid, even with a high level of technology, does not produce one-hundred percent efficiency? We shall show that the current clinical measurements, which interpret the result as a mean score (e.g., pure-tone average, speech recognition threshold, AI-gram, etc.), do not deliver sufficient information about the characteristics of a SNHL listener's impairment when hearing speech, and thus, result in a poorly fitting hearing aid.\ This dissertation addressed three key questions, fundamental to clinical audiology and hearing science: (1) How well do the results of standard clinical tests predict the speech perception ability of SNHL patients? (2) Are the existing methods of hearing aid fitting (e.g., the half-gain rule, NAL-R, etc.) appropriate for modern hearing aid technology? (3) How useful are measured error patterns of speech perception in SNHL patients in addressing these perception errors?\ Four sub-studies were conducted for finding answers to the proposed questions: textbf{Study I} measured individual consonant errors to quantify how each hearing-impaired (HI) listener perceives speech sounds (e.g., high- vs. low-error consonants), and then compared the individual consonant errors to the results provided by currently used clinical measurements to ascertain the differences. The results of Study I showed that the HI ear had significant errors in receiving only a few consonants. There was a low correlation between the error rates of high-error consonants and either degree and configuration of pure-tone hearing threshold or average consonant scores. textbf{Study II} examined how reliably a CV listening test could measure a HI listener's consonant loss using only {it zero-error} (ZE) utterances (defined as utterances for which normal hearing (NH) listeners incur zero errors, citep{singh2011}) and having a statistically suitable number of presentations in CVs, in order to characterize unique HI consonant loss. We provided graphical as well as statistical analysis to see not only the error rate (%) of a target consonant but also its pattern of specific confusions. As we found in Study I, there was no measurable correlation between pure-tone threshold and the error rate, or no identification of high-error consonants in HI ears. As noise increased, the percentage of error and confusions of target consonants increased. Although some consonants showed significantly higher errors and resulted in more confusion than others, HI ears have a very different consonant confusion pattern than NH ears, which may not be either measured or analyzed by the use of average scores. Comparison between the two (separated) phases of the experiment (Exp.~II) showed a good internal consistency for all HI ears. textbf{Study III} investigated whether or not NAL-R amplification might offer a positive benefit to speech perception of each HI listener at the consonant level, i.e., differentiates consonants that are distorted with amplification from those that achieve a positive benefit from amplification. The results were then compared to the current clinical measurement to see a relation between consonants which have positive amplification benefit and hearing loss. Regardless of NAL-R amplification, HI listeners have their own consonant dependence and the dependence was not predicted by either pure-tone threshold or aided threshold. HI listeners who have symmetrical hearing loss do not have the same positive amplification benefit to the two ears. textbf{Study IV} characterized consonant perception errors of each HI listener by identifying missing critical features of misheard consonants as a function of signal-to-noise ratio (SNR), while following the same procedure (i.e., increasing the number of ZE utterance presentations up to 20) as in Study II, yet for the NAL-R amplification condition. As the noise increased, consonant error and confusions were significantly increased, although by applying gains provided by NAL-R amplification correction. The percentage of error and confusions of the target consonants were different across the HI ears, thus could not be averaged. When the results of Study IV were compared with those of Study II, a significant amplification effect is found. Generally, the percentage of error and confusions were decreased in the NAL-R condition as a function of SNRs. However, typical average analysis, using mean score and grouping the HI ears, failed to explain the idiosyncratic characteristics of HI speech perception.\ Overall, this series of studies concluded that current average measures and analyses have a serious, even fatal limitation in finding problems of HI speech perception. Therefore, we have explored the use of the nonsense CV test for as a more precise measure. We will show that this can make significant contributions to HI speech perception. We propose that this CV test and its application might be utilized in the clinical setting, to improve the diagnosis of HI speech perception. This research will help HI listeners hear day-to-day conversations more clearly, as well as aid in audiological diagnosis and successful rehabilitation to increase speech perception for HI listeners.
Download or read book Perceptual Characteristics of Consonant vowel Transitions for Hearing impaired Listeners written by James M. Lynn and published by . This book was released on 1975 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Techniques for Understanding Hearing impaired Perception of Consonant Cues written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Auditory and Visual Pattern Recognition written by David J. Getty and published by Routledge. This book was released on 2017-03-31 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: The systematic scientific investigation of human perception began over 130 years ago, yet relatively little is known about how we identify complex patterns. A major reason for this is that historically, most perceptual research focused on the more basic processes involved in the detection and discrimination of simple stimuli. This work progressed in a connectionist fashion, attempting to clarify fundamental mechanisms in depth before addressing the more complex problems of pattern recognition and classification. This extensive and impressive research effort built a firm basis from which to speculate about these issues. What seemed lacking, however, was an overall characterization of the recognition problem – a broad theoretical structure to direct future research in this area. Consequently, our primary objective in this volume, originally published in 1981, was not only to review existing contributions to our understanding of classification and recognition, but to project fruitful areas and directions for future research as well. The book covers four areas: complex visual patterns; complex auditory patterns; multi-dimensional perceptual spaces; theoretical pattern recognition.
Download or read book Journal of Rehabilitation Research and Development written by and published by . This book was released on 1986 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Rehabilitation R D written by and published by . This book was released on 1986 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Rehabilitation Research Development written by and published by . This book was released on 1986 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Amplification of Vowel Transitions on Consonant Perception in Hearing impaired Listeners written by and published by . This book was released on 2005 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Consonant Discrimination as a Function of Presentation Level in Hearing impaired Listeners written by Howard Neal Gutnick and published by . This book was released on 1979 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Consonant Loss Profile and Perceptual Confusions for Hearing Impaired Listeners in Noise written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Linguistics and Language Behavior Abstracts written by and published by . This book was released on 2008 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Listening to Speech written by Steven Greenberg and published by Psychology Press. This book was released on 2012-12-06 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: The human species is largely defined by its use of spoken language, so integral is speech communication to behavior and social interaction. Despite its importance in everyday life, comparatively little is known about the auditory mechanisms that underlie the ability to understand language. The current volume examines the perception and processing of speech from the perspective of the hearing system. The chapters in this book describe a comprehensive set of approaches to the scientific study of speech and hearing, ranging from anatomy and physiology, to psychophysics and perception, and computational modeling. The auditory basis of speech is examined within a biological and an evolutionary context, and its relevance to applied domains such as communication disorders and speech technology discussed in detail. This volume will be of interest to scientists, engineers, and clinicians whose professional work pertains to any aspect of spoken language or hearing science.
Download or read book Strategies for Selecting and Verifying Hearing Aid Fittings written by Michael Valente and published by Thieme. This book was released on 2011-01-01 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Perception of Consonant Voicing Cues written by Lisa D. Holden and published by . This book was released on 1981 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of the Acoustical Society of America written by Acoustical Society of America and published by . This book was released on 2006 with total page 1114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hearing Loss written by National Research Council and published by National Academies Press. This book was released on 2004-12-17 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Proceedings of the International Congress on Acoustics written by and published by . This book was released on 1992 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
