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 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 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 Auditory Steady State Responses written by Christina J. B. Bradford and published by . This book was released on 2013 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: The Auditory Steady State Response (ASSR) is an auditory evoked potential (AEP) that can be used to objectively estimate hearing sensitivity in individuals with normal hearing sensitivity as well as those with various degrees and configurations of sensorineural hearing loss (SNHL). Purpose: This purpose of this project is to create a tutorial on the ASSR for audiologists and AuD students who have limited (1 - 5 years) clinical experience with AEPs. It is the authors' hope that this manuscript can serve as a central resource for current information regarding the various aspects of this response. Design: This tutorial has been organized into various sections including: the history of the ASSR, unique terminology associated with this response, the types of stimuli used to elicit the response, two common stimulation methods, two common ways to objectively analyze the response and a discussion of the frequency and place specificity of this response for both air and bone conduction testing. This manuscript contains a glossary of key terms located at the end of the document. The tutorial contains numerous figures which attempt to walk the reader through key concepts associated with this response. Several tables provide a summary of the accuracy of the ASSR in estimating pure tone air and bone conduction thresholds for individuals with normal hearing sensitivity as well as those with SNHL. Topics such as the influence of degree and configuration of SNHL as well as the effects of single frequency versus multiple frequency stimulation techniques on the accuracy of estimating air-conduction behavioral thresholds via ASSR are discussed. Similarly, the effects of bone conduction oscillator placement, coupling force, the number of recording channels, and the influence of neuro-maturation are discussed for estimating bone-conduction behavioral thresholds via ASSR. Conclusion: Most researchers agree that in the future, ASSR testing will play an important role in clinical audiology across various populations. Therefore it is important for clinical audiologists and AuD students to have a good basic understanding of the technical concepts associated with this response as well as a knowledge of optimal stimulus and recording parameters used to record this response.
Download or read book Pure Tone Audiometry and Masking written by Maureen Valente and published by Plural Publishing. This book was released on 2009-09-01 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Accuracy of Auditory Steady State Response ASSR for Prediction of Behavioral Pure tone Thresholds written by Ryan Potter and published by . This book was released on 2013 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study attempted to determine the most appropriate clinical protocol for using the Auditory Steady-State Response for the prediction of pure tone behavioral thresholds. Behavioral and Auditory Steady-State Response thresholds were measured at 500 - 4000 Hz from sixteen normal-hearing subjects. All subjects were tested using both the single-frequency ASSR test approach as well as the multiple-frequency ASSR test approach in an attempt to determine which approach was the most accurate predictor of behavioral pure-tone thresholds. Additional test parameters, such as the EEG recording channel (ipsilateral versus contralateral) and overall test duration were evaluated in order to determine the most appropriate clinical protocol for obtaining Auditory Steady-State Response thresholds. The results of this study revealed that using a combination of the multiple-frequency ASSR test approach to initially bracket threshold and the single-frequency ASSR test method to better define threshold would most likely yield the most accurate estimation of pure-tone behavioral thresholds in the most acceptable amount of time. The study also determined that a two channel recording (ipsilateral and contralateral) should be employed to yield the most sensitive ASSR thresholds.
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 Electric Response Audiometry in Clinical Practice E Book written by Abramovich and published by Elsevier Health Sciences. This book was released on 2013-05-02 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electric Response Audiometry in Clinical Practice E-Book
Download or read book The Auditory Steady State Response in Individuals with Neurological Insult of the Central Auditory Nervous System written by Jennifer Brooke Shinn and published by . This book was released on 2005 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Slow Cortical Auditory Evoked Potentials and Auditory Steady state Evoked Responses in Adults Exposed to Occupational Noise written by Leigh Biagio and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In individuals claiming compensation for occupational noise induced hearing loss, a population with a high incidence of nonorganic hearing loss, a reliable and valid behavioural pure tone (PT) threshold is not always achievable. Recent studies have compared the accuracy of behavioural PT threshold estimation using the slow cortical auditory evoked potentials (SCAEP) and auditory steady-state responses (ASSR) but there is no consensus regarding recommended technique. A review of the literature indicated that no comparison has been completed on the use of SCAEP and a single frequency ASSR technique. A research project was therefore initiated with the aim of comparing the clinical effectiveness (accuracy) and clinical efficiency (time required) of SCAEP and ASSR for behavioural PT threshold estimation in adults exposed to occupational noise. Adult participants were divided into a group with normal hearing (behavioural PT thresholds
Download or read book Threshold Estimation in Normal and Impaired Ears Using Auditory Steady State Responses written by Riette Bosman and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Auditory Steady State Response (ASSR) procedure has been established as a frequency specific, objective audiologic measure, which can provide reliable thresholds to within 10 dB of the behavioral thresholds. In order for ASSR to find its place in the existing framework of audiometric procedures, the full potential of the procedure needs to be explored. The aim of this study was to determine the accuracy of monotic ASSR in estimating hearing thresholds in a group of 15 normal hearing subjects and 15 hearing-impaired subjects. A comparative research design was implemented. Indicating that results obtained in the study was compared to relevant literature where dichotic multiple ASSR was implemented. This was done in order to ascertain ASSR's capabilities with regard to stimulus presentation methods. Monotic single ASSR predicted behavioural thresholds in the normal hearing subjects within an average of 24 dB across the frequency range (0.5, 1, 2 & 4 kHz). In the hearing-impaired group, ASSR thresholds more closely resembled behavioural thresholds, with an average difference of 18 dB, which is consistent with recent literature. The literature suggests that better prediction of behavioural thresholds will occur with greater degrees of hearing loss, due to recruitment. The focus in this group also centered on the accurate prediction of the configuration of the hearing loss. It was found that ASSR could reasonably accurately predict the configuration of the hearing loss. In the last instance, monotic single and dichotic multiple ASSR were compared with regard to threshold estimation and prediction of configuration of the hearing loss in the hearing-impaired group. Little difference was reported between the two techniques with regard to the estimation of thresholds in both the normal hearing and hearing impaired groups. In conclusion it was established that monotic ASSR could predict behavioural thresholds of varying degrees and configurations of hearing loss in normal and hearing-impaired subjects with a reasonable amount of accuracy. At this stage, however, more research is required to establish the clinical validity of the procedure, before it is routinely included within an objective test battery.
Download or read book Auditory Steady state Response written by Theresa Marie Strobel and published by . This book was released on 2013 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Auditory Steady State Response (ASSR) is an auditory evoked potential (AEP) that can be used to accurately and objectively estimate hearing thresholds from infants through adults and in people with various types and degrees of hearing loss. For this reason and because of its potential ease of use, many clinical audiologists are interested in learning more about this response, but the ASSR has unique terminology and there are few resources aimed at making the ASSR more accessible for daily clinical use. This goal of this project is to create and publish a tutorial to provide students and audiologists with a resource that covers all of the relevant topics needed to learn and use ASSR clinically.
Download or read book Estimating Pure Tone Thresholds by Using the Multiple Frequency Auditory Steady State Response in Comparison with the Auditory Late Latency Response in Adults with Normal Hearing written by Trumé Hattingh and published by . This book was released on 2003 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Sound Foundation Through Early Amplification written by Richard C. Seewald and published by [S.l.] : Phonak AG. This book was released on 2000 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hearing written by Stanley A. Gelfand and published by CRC Press. This book was released on 2004-09-28 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brimming with more than more than 1700 references, this reader-friendly and extensively revised Fourth Edition will prove invaluable to instructors and students alike-providing a unified approach to the anatomical, physiological, and perceptual aspects of audition with updated chapters on the latest developments in the field.
Download or read book Auditory Late Response Versus 40 Hz Auditory Steady State Response written by Yei Ju Bella Kim and published by . This book was released on 2020 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluated the use of the newest generation multiple auditory steady state responses (ASSRs) and auditory late responses (ALRs) in objective hearing threshold estimation in awake adults. A within-subject performance comparison between the 40 Hz ASSR and the ALR was conducted in 25 participants. Each participant was assessed monaurally using the Interacoustics Eclipse EP25. The test ear and order of testing were counterbalanced across participants. Stimuli centred at four test frequencies: 500, 1000, 2000 and 4000 Hz were presented via Eartone 3ATM insert earphones. The 40 Hz multiple ASSR used the narrowband (NB) CE-Chirp©, whilst the ALR used the long duration (80 ms) tone bursts. Note that for the ALR, 500 and 2000 Hz were prioritised, with the inclusion of 1000 and 4000 Hz if time and participant status permitted. The total test time for the 40 Hz ASSR to obtain a four-point audiogram was obtained by the time recorded on the software. The ALR test time was calculated in two forms: “actual” and “estimated”. The “actual” test time was calculated using the number of sweeps recorded for obtaining two frequencies (500 and 2000 Hz). The “estimated” time to obtain a four-point audiogram was calculated by doubling the “actual” time. Relative accuracy in estimating the behavioural audiogram was determined by comparing thresholds from each AEP measure. Results indicated comparable threshold estimates for 500 Hz, but statistically significantly lower (p
