Download or read book Accuracy of Bone conduction Auditory Brainstem Response ABR in Predicting Bone conduction Behavioral Thresholds in Normal hearing Adults written by Mary Carson and published by . This book was released on 2013 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bone-conduction behavioral thresholds and bone-conduction auditory brainstem response (ABR) thresholds were recorded to 500 and 2000 Hz tonal stimuli in 15 normal hearing adult subjects in order to determine the accuracy of the bone-conduction ABR in predicting bone-conduction behavioral thresholds in this clinical population. Results revealed mean difference scores between the bone-conduction ABR threshold and the bone-conduction behavioral audiometric threshold of 7.67 dB at 500 Hz and 4.33 dB at 2000 Hz. In addition, 93% of the bone-conduction ABR threshold estimations were within 10 dB of the behavioral audiometric threshold at 500 Hz and 100% of the bone-conduction ABR threshold estimations were within 10 dB of the behavioral audiometric threshold at 2000 Hz. These findings indicate that the bone-conduction ABRs to 500 and 2000 Hz brief tonal stimuli can be used to accurately estimate pure-tone behavioral audiometric thresholds at these two test frequencies in adults with normal hearing sensitivity.
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 An Evaluation of the Auditory Steady State Response ASSR as an Estimate of Pure Tone Audiometry in Patients with Simulated Conductive Hearing Loss written by Sharea A. Mines and published by . This book was released on 2013 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study we proposed to verify the results of previous ASSR research by examining the accuracy of the ASSR in the estimation of pure tone thresholds in normal-hearing adults with simulated conductive hearing losses. A combination of cotton and foam was used to create a simulated conductive hearing loss in 10 normal-hearing adult subjects. Pure tone air and bone conduction audiometry as well as ASSR testing was completed on all 10 subjects. The results of the study revealed that the air conducted ASSR to repeated sequence tonal stimuli can predict behavioral pure tone simulated air conduction thresholds to within 0-5 dB nHL and 10-25 dB SPL at carrier frequencies of 500, 1000, 2000 and 4000 Hz. Similarly, bone conducted ASSRs can predict pure tone bone conduction thresholds to within approximately 5-20 dB nHL and 20-30 dB SPL at carrier frequencies of 500 Hz to 4000 Hz. Based on these results and comparable findings from previous ASSR research, audiologists should feel comfortable in relying on the ASSR to accurately predict the pure tone audiogram.
Download or read book The Auditory Steady State Response written by Rance, Gary and published by Plural Publishing. This book was released on 2008-02-01 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written for auditory clinicians and researchers alike, this is the first monograph on this important area of auditory science that traces the international research effort from its origins in the 1970s to the present day. Comprising contributions from experts in a range of disciplines including auditory physiology, engineering, medicine and audiology, the book presents comprehensive and authoritative coverage of the generation and recording of the ASSR and the clinical applications of the response.
Download or read book The Use of Simulation Techniques to Investigate the Effects of Conductive Hearing Loss on the Auditory Brainstem Response written by Molly Bishop and published by . This book was released on 2018 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: A click-evoked Auditory Brainstem Response (ABR) was recorded on 28 normal hearing adult participants to determine the effects of different degrees of conductive hearing loss on the response properties of the ABR. Participants were divided at random into two groups: the normal hearing group and the simulated conductive hearing loss group. In the normal hearing group, baseline behavioral pure tone audiometry from 250-8000 Hz and acoustic immittance testing (tympanometry and contralateral acoustic reflex thresholds from 500-2000 Hz) were performed to ensure normal hearing and middle ear function. Then, ABR testing was performed in both right and left ears to click stimuli beginning at 80 dBnHL. Stimulus intensity was decreased in 10 dB increments until a stimulus intensity of 30 dBnHL was reached. At stimulus intensities less than 30 dB nHL, stimulus intensity was decreased in 5 dB increments until the participant's ABR threshold was determined. In the simulated conductive hearing loss group, baseline behavioral pure tone audiometry from 250-8000 Hz and acoustic immittance testing (tympanometry and contralateral acoustic reflex thresholds from 500-2000 Hz) were performed to ensure normal hearing and middle ear function. Then, 5 mm of moleskin was placed in the tubing for the ER3A insert receivers and pure tone air conduction thresholds were re-measured in each ear. For the conductive group, the ABR was recorded using the ER3A insert receivers with moleskin. The ABR was recorded in both right and left ears to click stimuli beginning at 80 dBnHL. Stimulus intensity was decreased in 10 dB increments until a stimulus intensity of 60 dBnHL was reached. At stimulus intensities less than 60 dBnHL, stimulus intensity was decreased in 5 dB increments until the participant's ABR threshold was determined. For both groups, results revealed an increase in the mean absolute latencies of waves I, III, and V as stimulus intensity decreased. In contrast, results showed a decrease in the mean peak-to-peak amplitudes for waves I-I' and V-V' as a function of stimulus intensity. Mean interpeak latency values were consistent across stimulus intensities. Mean absolute latency values for all waves were greater for the simulated hearing loss group than the normal hearing group. In contrast, the mean peak-to-peak amplitude values for waves I-I' and V-V' were smaller for the simulated hearing loss group than the normal hearing group. These results were compared to previous data collected in the ABR literature on both normal hearing and conductive hearing loss participants. Results for both groups in the current study were in good agreement with the ABR literature as seen in the mean ABR values and the variability represented by standard deviation measurements. The data collected from this study will be used to develop a parametric approach to generating simulated responses for the commercially available Auditory Brainstem Response (ABR) recording simulator, ISAO by Intelligent Hearing Systems. This data will serve as basis for developing functions of response characteristics such as peak latency and amplitude as well as recording parameters like intensity, rate and stimulus characteristics. Further research should be conducted to determine the effects of other stimulus parameters on the ABR. These stimulus parameters include rate, polarity, and frequency.
Download or read book Comparisons of Auditory Steady state Response and Behavioural Air and Bone conduction Thresholds in Infants and Adults with Normal Hearing written by Kelly-Ann Casey and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Air and Bone Conduction Auditory Brainstem Thresholds and Latency Measures in Normal and Hearing impaired Adults written by Angesom Okbamichael Hagos and published by . This book was released on 2009 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparison of Behavioral and Auditory Brainstem Response Measures of Conductive Hearing Loss in Humans written by Evan M. Hill and published by . This book was released on 2009 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The auditory brainstem response (ABR) is an electrophysiological measure of hearing commonly used to detect hearing loss. Indeed, comparisons of ABR and behavioral thresholds have indicated that the two measures are, on average, highly correlated. However, recent research using rats has indicated that although the ABR may be correlated with behavioral measures of hearing, it does not reliably measure the degree of sensorineural threshold shift caused by exposure to loud sound. Considering these findings, the purpose of this study was to determine if the ABR can reliably estimate the degree of threshold shift caused by a conductive hearing loss. This was done by measuring the ABR and behavioral threshold shifts caused by placing an earplug in the ears of normal human observers. The results indicated that although the ABR was fairly accurate in estimating mean threshold shift for a group, it did not accurately estimate individual threshold shifts.
Download or read book Clinical Applications of the Auditory Brainstem Response written by Linda J. Hood and published by Singular. This book was released on 1998 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on the auditory brainstem response (ABR) and its applications in evaluating neural disorders and hearing sensitivity, Clinical Applications of the Auditory Brainstem Response is an essential tool for every audiologist. This practical, hands-on manual provides the information necessary to understand the bases for and applications of the auditory brainstem response in clinical practice, presenting substantive, valuable information on both performance and interpretation of the measures.
Download or read book A Study of the Reliability and Validity of Bone Conduction Audiometry written by Robert Ernest Roach and published by . This book was released on 1952 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tonal Bone conduction Thresholds by Electroencephalic Audiometry written by Ellen Patricia Block and published by . This book was released on 1984 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Functional Neurobiology of Aging written by Patrick R. Hof and published by Elsevier. This book was released on 2001-01-11 with total page 989 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some well-known age-related neurological diseases include Parkinson's disease, Alzheimer's disease, deafness, and blindness. Even more common are the problems of aging which are not due to disease but to more subtle impairments in neurobiological systems, including impairments in vision, memory loss, muscle weakening, and loss of reproductive functions, changes in body weight, and sleeplessness. As the average age of our society increases, diseases of aging continue to become more common, and conditions associated with aging need more attention by doctors and researchers. In 1991, patients over the age of 65 saw their doctors an average of eight times per year. Research funding is provided by the Neuroscience and Neuropsychology of Aging (NNA) Program, which is run by the National Institute on Aging. This book offers a comprehensive overview of all topics related to functional impairments which are related to the aging brain and nervous system. It is organized according to four general functions: movement, senses, memory, and neuroendocrine regulation. Written by the leading researchers in the field, this comprehensive work addresses both impairments associated with diseases and not associated with diseases, making it easier to understand the mechanisms involved. Functional Neurobiology of Aging is an important reference for professionals and students involved in aging research, as well as physicians who need to recognize and understand age-related impairments. - Organized by function, making it easy to find and understand the material - Addresses impairments both associated with diseases and not associated with diseases - Written by leading researchers in the field - Most comprehensive source of information on the neurobiology of aging
Download or read book PREDICTION OF HEARING THRESHOL written by Ngan-Kam Kammy Yeung and published by Open Dissertation Press. This book was released on 2017-01-27 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Prediction of Hearing Thresholds: Comparison of Cortical Evoked Response Audiometry and Auditory Steady State Response Audiometry Techniques" by Ngan-kam, Kammy, Yeung, 楊銀金, 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 Prediction of Hearing Thresholds: Comparison of Cortical Evoked Response Audiometry and Auditory Steady State Response Audiometry Techniques Submitted by Yeung, Ngan Kam Kammy for the degree of Master of Science in Audiology at the University of Hong Kong in May 2004 The aim of the present study is to evaluate how well cortical evoked response audiometry (CERA) and auditory steady state response (ASSR) thresholds predict behavioral pure tone audiometric (PTA) thresholds at octave frequencies between 500 and 4000 Hz. 34 adult subjects aged 18 or above with normal hearing or sensorineural hearing loss ranging from mild to profound level were recruited. 63 ears met the test criteria for PTA, CERA and ASSR testing. In addition to overall analyses, these ears were divided into 3 groups (normal hearing, mild to moderately severe hearing loss, and severe to profound hearing loss) according to their average PTA thresholds for individual group analyses. CERA results measured using tone burst stimuli, and ASSR results measured using 100% amplitude modulated and 10% frequency modulated tone stimuli at a modulation frequency of 40 Hz were compared with reference to PTA thresholds. Overall correlations of CERA and ASSR thresholds with PTA thresholds were high, with viii Pearson r coefficients exceeding .97 and .95 respectively for each of the test frequency. Individual group correlations, however, were significant at all test frequencies only in the hearing impaired groups. CERA and ASSR thresholds differed significantly from PTA thresholds in the normal hearing group. In addition, overall and individual group mean discrepancies between CERA and PTA thresholds were in general less than those between ASSR and PTA thresholds. 78.2% of the test ears had CERA thresholds within 10 dB of PTA thresholds and 71.0% of test ears had ASSR thresholds within 15 dB of PTA thresholds, showing that CERA thresholds better predicted PTA thresholds than ASSR thresholds. Results of the present study confirmed findings from previous research that both ASSR and CERA testing were accurate in predicting PTA thresholds for adult subjects with sensorineural hearing loss, but not as accurate for those with normal hearing. A closer agreement was exhibited between CERA and PTA thresholds than between ASSR and PTA thresholds using the same subjects. ix DOI: 10.5353/th_b3049431 Subjects: Audiometry, Evoked response Auditory evoked response
Download or read book The Middle Ear written by Sunil Puria and published by Springer Science & Business Media. This book was released on 2013-03-19 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: The middle ear plays a vital role in the sense and sensitivity of hearing. Of the various characteristics that distinguish mammals from other vertebrates, several pertain specifically to the middle-ear system, such as the presence of three middle-ear bones and the four-layer composite structure of the tympanic membrane. The Middle Ear attempts to elucidate the role this system plays in sound transmission, as viewed from both scientific and clinical perspectives.
Download or read book Effect of Bone Conduction Transducer Placement on Distortion Product Otoacoustic Emissions written by Julie L. Hazelbaker and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The purpose of this study was to develop a technique to determine the magnitude of bone conducted sound in the cochlea when stimuli are delivered from three different locations on the head. Distortion product otoacoustic emissions (DPOAE) at 1000 and 2000 Hz were used as tools to determine cochlear response to stimuli introduced via air conduction and bone conduction in three subjects. The bone conduction transducer was moved to three head locations (ipsilateral mastoid, contralateral mastoid and forehead). The intensity of the emissions elicited was compared. The differences in DPOAE magnitude created by varying the location of the bone conduction transducer were compared with behavioral threshold differences with the same transducers at the same locations. It was assumed that results of behavioral measures would provide a prediction of the relationship between air and bone conducted DPOAE. However, in the current study, this was not the case. Behavioral bone conduction threshold data did not predict differences in DPOAE at different bone conduction transducer locations. This was a somewhat surprising result and should be considered further in future studies examining the properties of DPOAE elicited by bone conduction. Additionally, a wide band noise masker was introduced to the non-test ear when bone conducted stimuli were introduced to make DPOAE and behavioral test conditions as similar as possible. No great suppression effects were noted across subjects for either frequency. This was likely due to the shape and intensity of the contralateral masked used.
Download or read book Pseudohypacusis written by James E. Peck and published by Plural Publishing. This book was released on 2011-04-10 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt:
