Download or read book Test retest Variability of Click evoked Otoacoustic Emissions CEOAEs in Normal Hearing Adults written by Barbara A. Luikart and published by . This book was released on 1995 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Test Retest Reliability of Distortion Product Otoacoustic Emissions in the High Frequency Range written by Hoi-Yee Iris Ng and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Test-retest Reliability of Distortion Product Otoacoustic Emissions in the High Frequency Range" by Hoi-yee, Iris, Ng, 伍凱怡, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of dissertation entitled Test-retest Reliability of Distortion Product Otoacoustic Emissions in the High Frequency Range submitted by NG, Hoi-Yee Iris for the degree of Master of Science in Audiology at the University of Hong Kong in May 2002 In the current research study, distortion product otoacoustic emissions (DPOAEs) were measured in 35 young Chinese adults (61 ears) with normal audiometric thresholds using an ILO96 OAE system with the default DP-gram protocols as well as user-defined DP spectrum protocols in the high frequency range. Two series of retest were conducted 20 minutes and an average of 15 days later, and the resolution setting for the DP-gram measurements was varied between 1 to 8 points per octave in each test series. Transient evoked otoacoustic emissions (TEOAEs) were also recorded in each test series for comparison purposes. Test-retest partial correlation and standard error of measurement (SEM) were computed to reflect the test-retest reliability of the OAE amplitudes, noise floor and signal-to-noise ratio. Results suggested that OAE amplitudes in the default frequency range (1 to 6 kHz) between test and retest were highly correlated with an average correlation coefficient of 0.85 and SEM was found to be an average of 2.4 dB, while signal-to-noise ratio and noise floor yielded lower correlation coefficients and higher SEMs. OAE amplitudes in the higher frequency range of 6.5 to 7 kHz were also significantly correlated between test and retest (correlation coefficient ranged from 0.74 to 0.80) with SEM from 2.7 to 3.5 dB. Yet DPOAEs at 8 kHz were present with a positive signal-to-noise ratio in only one-third of ears, were less test-retest correlated, and the amplitude revealed a high SEM of 5 dB. No apparent difference was demonstrated among various resolution settings and between short- and long- term retest. This implies that DPOAEs in the high frequency range (6.5 to 7 kHz) could be a potential clinical tool for monitoring cochlear functioning in cases such as exposure to ototoxic medication or noise. vii DOI: 10.5353/th_b2701474 Subjects: Otoacoustic emissions Hearing - Measurement
Download or read book Spontaneous and Click Evoked Otoacoustic Emissions from Normal Hearing Young Adults written by 陳翠鑫 and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book DPOAEs Test retest Reliability with Varying L1 L2 Ratios in Normal Hearing Individuals written by Koren R. Wasilka and published by . This book was released on 1999 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reliability of distortion product otoacoustic emissions (DPOAEs) using various stimulus intensity levels was evaluated on the ears of 30 young adult volunteers with normal hearing and normal middle ear function. The purpose was to determine if test-retest reliability of DPOAEs varies on individuals with normal hearing when two test parameters, intensity level and L1/L2 ratio, are changed.
Download or read book Spontaneous and Click evoked Otoacoustic Emissions from Normal Hearing Young Adults written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Establishing the Test Retest Reliability of Contralateral Auditory Suppression of Transient Evoked Otoacoustic Emissions in a Cohort of Healthy Individuals written by Indika Pradeepa Kumari Gunasena Mahawattage and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In clinical practice, Transient Evoked Otoacoustic Emissions (TEOAE) are used to assess hearing impairments in several cohorts. The TEOAE can be evoked in healthy cochlea by presenting a brief auditory stimulus in the form of a series of clicks. Similarly, TEOAE signals can be suppressed in the ipsilateral ear by presenting an alternative sound to the contralateral ear through stimulation of either the medial olivo-cochlear (MOC) reflex or acoustic reflex (AR). The suppression effect results from either due to attenuation of the otoacoustic emissions generation through the activation of MOC reflex or due to the obliteration of their transmission by the activation of middle ear muscle reflex (acoustic reflex). In individuals that suffer from brain injury, such as a concussion, the neuronal pathways that enable CASTEOAE may be disturbed which in turn will restrict the ability to generate TEOAEs and to invoke the contralateral suppression effect. Moreover, since a person performing the test cannot manipulate TEOAE signals, the technique could provide an objective measure of concussion status and severity. The following study was designed to measure the test-retest reliability of the CASTEOAE as a first step in establishing the CASTEOAE phenomenon as an evaluation tool for concussion assessment. A convenience sample of 30 healthy individuals, 16-50 years of age completed the CASTEOAE test on two separate occasions, using a 14-day between test interval. The MOC reflex was activated using broadband noise of 60 dB SPL while the Acoustic Reflex was elicited by presenting a broadband noise of 80 dB SPL to the contralateral ear. The OAE amplitudes were recorded across 5 half octave bands in each ear. The test-retest reliability was estimated with the intraclass correlation coefficient procedure using a one-way random effects model for n=30, k (trials)=2. Confidence intervals for the Intraclass Correlation Coefficients (ICCs) and measures of homogeneity of variance were also calculated for each condition. The reliability estimates for CASTEOAE test scores were calculated for TEOAE scores with and without contralateral suppression (Primary measures) of the MOC reflex and separately for the acoustic reflex. The ICCs of the total OAE responses for both MOC reflex and acoustic reflex demonstrated as high as 0.9 in both ears and the ICCs of the fractional octave band for the MOC reflex ranged from 0.6 (left ear @1000 Hz) to 0.95 (right ear @ 4000 Hz), and 0.75 (left ear @1000 Hz) to 0.97 (right ear @ 4000 Hz) for the AR. This data suggests that the MOC and AR reflexes were each significantly repeatable upon test and retest in the sample. In addition, CASTEOAE suppression of the acoustic reflex was greater than MOC reflex suppression; and each participant showed unique TEOAE distribution pattern across the 5 half octave frequency bands, which were consistent over time. The results support the use of the CASTEOAE test as a reliable non-invasive approach to evaluate the functional status of the auditory efferent system and its neural connections with the rest of the brain and the use of this stable and objective measure as a clinical tool to assess a concussion injury.
Download or read book ESTABLISHING THE TEST RETEST RELIABILITY OF CONTRALATERAL AUDITORY SUPPRESSION OF TRANSIENT EVOKED OTO ACOUSTIC EMISSIONS IN A COHORT OF NORMAL HEALTHY INDIVIDUALS FOR THE PURPOSE OF DEVELOPING AN EVALUATION TOOL FOR CONCUSSION written by Indika Mahawattage and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In clinical practice, transient evoked otoacoustic emissions (TEOAE) are used to assess hearing impairments in several cohorts. The TEOAE can be evoked in healthy cochlea by presenting a brief auditory stimulus in the form of a series of clicks. Similarly, TEOAE signals can be suppressed in the ipsilateral ear by presenting an alternative sound to the contralateral ear through stimulation of either the medial olivo-cochlear (MOC) reflex or acoustic reflex (AR). The suppression effect results from either due to attenuation of the otoacoustic emissions generation by the cochlear outer hair cells through the activation of MOC reflex or due to the obliteration of their transmission by the activation of middle ear muscle reflex (Acoustic Reflex). In individuals that suffer a brain injury, such as a concussion, the neuronal pathways that enable CASTEOAE may be disturbed which in turn will restrict the ability to invoke the contralateral suppression effect. Moreover, since a person performing the test cannot manipulate TEOAE signals, the technique could provide an objective measure of concussion status and severity.The following study was designed to measure the test-retest reliability of the CASTEOAE as a first step in establishing the CASTEOAE phenomenon as an evaluation tool for concussion assessment. A convenience sample of 30 healthy individuals, 16-50 years of age completed the CASTEOAE test on two separate occasions, using a 14-day between test interval. The MOC reflex was activated using broadband noise of 60 dB SPL while the Acoustic Reflex was elicited by presenting a broadband noise of 80 dB SPL to the contralateral ear. The OAE amplitudes were recorded across 5 half octave bands in each ear. Test-retest reliability was estimated with the intraclass correlation coefficient procedure using a one-way random effects model for n=30, k (trials)=2. Confidence intervals for the intraclass correlation coefficients (ICCs) and measures of homogeneity of variance were also calculated for each condition. Reliability estimates for CASTEOAE test scores were calculated for the TEOAE scores with and without contralateral suppression (Primary measures) of the MOC reflex and separately for the Acoustic Reflex. ICCs of the Total OAE responses for both MOC reflex and Acoustic reflex demonstrated as high as 0.9 in both ears and the ICCs of the fractional octave band for the MOC reflex ranged from 0.6 (left ear @1000 Hz) to 0.95 (right ear @ 4000 Hz), and 0.75 (left ear @1000 Hz) to 0.97 (right ear @ 4000 Hz) for the AR. These data suggest that the MOC and AR reflexes were each significantly repeatable upon test and retest in the sample. In addition, CASTEOAE test suppression of the acoustic reflex was greater than MOC reflex suppression; and each participant showed unique TEOAE distribution patterns across the 5 frequency half octave bands, which were consistent over time. The results support the use of the CASTEOAE test as a reliable non-invasive approach to evaluate the functional status of the auditory efferent system and its neural connections with the rest of the brain and the use of this stable and objective measure as a clinical tool to assess a concussion injury.
Download or read book Asha written by American Speech and Hearing Association and published by . This book was released on 1992 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mechanics and Biophysics of Hearing written by Peter Dallos and published by Springer. This book was released on 2014-03-11 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a workshop on the physics and biophysics of hearing that brought together experimenters and modelers working on all aspects of audition. Topics covered include: cochlear mechanical measurements, cochlear models, mechanicals and biophysics of hair cells, efferent control, and ultrastructure.
Download or read book Understanding the Cochlea written by Geoffrey A. Manley and published by Springer. This book was released on 2017-08-30 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SHAR volume serves to expand, supplement, and update the original "Cochlea" volume in the series. The book aims to highlight the power of diverse modern approaches in cochlear research by focusing on advances in those fields over the last two decades. It also provides insights into where cochlear research is going, including new hearing prostheses for the deaf that will most likely soon enter the phase of clinical trials. The book will appeal to a broad, interdisciplinary readership, including neuroscientists and clinicians in addition to the more specific auditory community.
Download or read book Sexual Fluidity written by Lisa M. Diamond and published by Harvard University Press. This book was released on 2008 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Is love “blind” when it comes to gender? For women, it just might be. This unsettling and original book offers a radical new understanding of the context-dependent nature of female sexuality. Lisa M. Diamond argues that for some women, love and desire are not rigidly heterosexual or homosexual but fluid, changing as women move through the stages of life, various social groups, and, most important, different love relationships.This perspective clashes with traditional views of sexual orientation as a stable and fixed trait. But that view is based on research conducted almost entirely on men. Diamond is the first to study a large group of women over time. She has tracked one hundred women for more than ten years as they have emerged from adolescence into adulthood. She summarizes their experiences and reviews research ranging from the psychology of love to the biology of sex differences. Sexual Fluidity offers moving first-person accounts of women falling in and out of love with men or women at different times in their lives. For some, gender becomes irrelevant: “I fall in love with the person, not the gender,” say some respondents.Sexual Fluidity offers a new understanding of women’s sexuality—and of the central importance of love.
Download or read book Active Middle Ear Implants written by Klaus Böheim and published by Karger Medical and Scientific Publishers. This book was released on 2010 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book The Auditory Brainstem Response written by John T. Jacobson and published by Taylor & Francis Group. This book was released on 1985 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Auditory Prostheses written by Fan-Gang Zeng and published by Springer Science & Business Media. This book was released on 2011-09-15 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cochlear implants are currently the standard treatment for profound sensorineural hearing loss. In the last decade, advances in auditory science and technology have not only greatly expanded the utility of electric stimulation to other parts of the auditory nervous system in addition to the cochlea, but have also demonstrated drastic changes in the brain in responses to electric stimulation, including changes in language development and music perception. Volume 20 of SHAR focused on basic science and technology underlying the cochlear implant. However, due to the newness of the ideas and technology, the volume did not cover any emerging applications such as bilateral cochlear implants, combined acoustic-electric stimulation, and other types of auditory prostheses, nor did it review brain plasticity in responses to electric stimulation and its perceptual and language consequences. This proposed volume takes off from Volume 20, and expands the examination of implants into new and highly exciting areas. This edited book starts with an overview and introduction by Dr. Fan-Gang Zeng. Chapters 2-9 cover technological development and the advances in treating the full spectrum of ear disorders in the last ten years. Chapters 10-15 discuss brain responses to electric stimulation and their perceptual impact. This volume is particularly exciting because there have been quantum leap from the traditional technology discussed in Volume 20. Thus, this volume is timely and will be of real importance to the SHAR audience.
Download or read book Child Language written by Michelle Aldridge and published by Multilingual Matters. This book was released on 1996 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprises 17 papers presented at the Child Language Seminar, Bangor 1994, with contributions in areas as diverse as bilingual development, phonological disorders, sign language development, and the language of Down's syndrome children.
Download or read book Basic Mechanisms in Hearing written by Aage Moller and published by Elsevier. This book was released on 2012-12-02 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt: Basic Mechanisms in Hearing is a collection of papers that discusses the function of the auditory system covering its ultrastructure, physiology, and the mechanism's connection with experimental psychology. Papers review the mechanics, morphology, and physiology of the cochlear, including the physiology of individual hair cells and their synapses. One paper examines the combined physiological and anatomical studies of stimulus coding in the mammalian auditory nervous system. The results of these studies pertain to the latency, frequency selectivity, and time pattern of responses to short tone bursts. Other research compare the cochlear nerve, behavioral, and psychophysical frequency selectivity which show that frequency selectivity of the auditory system occurs at the level of the cochlear nerve, becoming downgraded in end-organ deafness. Other papers discuss neural coding at higher levels such as the feature extraction in the auditory system of bats. Some papers also analyze the specialized hearing mechanisms in animals, for example, the echolocation of bats and in some insects, the function of the swimbladder in fish hearing, as well as the "invertebrate frequency analyzer" in the locust ear. Physiologists, neurophysiologists, neurobiologists, general medical practioners, and EENT specialists will find this collection valuable.
Download or read book The Efferent Auditory System written by Charles I. Berlin and published by Singular. This book was released on 1999 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Six studies explore how signals going from the brain to parts of the auditory system helps the system perform a number of functions, including adapting to background noise and allowing transients and other brief stimuli to be properly coded. Studies include discussions of the olivocochlear system and protection from acoustic injury, ontogenetic and evolutionary evidence for the motoneuron nature of vestibular and cochlear efferents, de-recruitment by multiband compression in hearing aids, and clinical applications. The CD contains a brief video of hair cell control and damping.
