Accuracy Of Auditory Steady State Response Assr For Prediction Of Behavioral Pure Tone Thresholds
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Accuracy Of Auditory Steady State Response Assr For Prediction Of Behavioral Pure Tone Thresholds
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Author : Ryan Potter
language : en
Publisher:
Release Date : 2013
Accuracy Of Auditory Steady State Response Assr For Prediction Of Behavioral Pure Tone Thresholds written by Ryan Potter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
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.
Prediction Of Behavioral Pure Tone Thresholds 500 4000 Hz Using Both The Single Frequency And Multiple Frequency Auditory Steady State Response Techniques
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Author : Melanie Esders
language : en
Publisher:
Release Date : 2013
Prediction Of Behavioral Pure Tone Thresholds 500 4000 Hz Using Both The Single Frequency And Multiple Frequency Auditory Steady State Response Techniques written by Melanie Esders and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
This study attempted to determine the most appropriate clinical protocol for using the Auditory Steady State Response for the prediction of behavioral thresholds. Sixteen normal hearing subjects were tested behaviorally as well as using the ASSR. All subjects were tested using the single-frequency ASSR approach as well as the multiple-frequency ASSR approach in attempts to determine the most accurate predictor of pure-tone behavioral thresholds at 500-4000Hz. Additional test parameters, such as recording channel (ipsilateral versus contralateral) and phase angles of the signal and noise, as well as total recording time were considered to determine the most appropriate protocol for obtaining ASSR thresholds in a clinical environment. The results of this study revealed that a combination of the multiple-frequency and single-frequency ASSR methods yielded the most accurate prediction of pure-tone behavioral thresholds in the most acceptable amount of time.
Prediction Of Hearing Threshol
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Author : Ngan-Kam Kammy Yeung
language : en
Publisher: Open Dissertation Press
Release Date : 2017-01-27
Prediction Of Hearing Threshol written by Ngan-Kam Kammy Yeung and has been published by Open Dissertation Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-27 with Medical categories.
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
Auditory Steady State Responses
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Author : Christina J. B. Bradford
language : en
Publisher:
Release Date : 2013
Auditory Steady State Responses written by Christina J. B. Bradford and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
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.
The Auditory Steady State Response
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Author : Rance, Gary
language : en
Publisher: Plural Publishing
Release Date : 2008-02-01
The Auditory Steady State Response written by Rance, Gary and has been published by Plural Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-02-01 with Medical categories.
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.
Auditory Steady State Response Assr And Behavioral Hearing Thresholds In Children With Absent Click Auditory Brainstem Response
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Author : Kulkanya Wongsantichon
language : en
Publisher:
Release Date : 2010
Auditory Steady State Response Assr And Behavioral Hearing Thresholds In Children With Absent Click Auditory Brainstem Response written by Kulkanya Wongsantichon and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Audiometry, Evoked response categories.
The Auditory Steady State Response
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Author : Ashlee A. Harrington
language : en
Publisher:
Release Date : 2012
The Auditory Steady State Response written by Ashlee A. Harrington and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Following an extensive literature review, an online tutorial was developed on the Auditory Steady State Response (ASSR). The literature review covers the following areas: auditory evoked potentials, history o the ASSR, neural generators of the ASSR, terminology unique to the ASSR, recording stimuli, stimulation techniques, analysis techniques for the ASSR, technical and recording parameters for the ASSR, subject factors, frequency and place specificity of the ASSR, clinical applications, calibration, and other considerations and future directions. The purpose of this website is to be a central information source of evidence-based practice for Doctor of Audiology (Au. D.) students and clinical audiologists with less than five-years experience with this auditory evoked potential. This website is easy to navigate, has animated figures describing various topics of the ASSR, and includes printer friendly downloads. The major topics of the website include: neural generators of the ASSR, terminology unique to the ASSR, stimuli utilized, stimulation techniques, analysis techniques, technical and recording parameters, subject variables, threshold estimation, calibration, and clinical applications.
An Evaluation Of The Auditory Steady State Response Assr As An Estimate Of Pure Tone Audiometry In Patients With Simulated Conductive Hearing Loss
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Author : Sharea A. Mines
language : en
Publisher:
Release Date : 2010
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 has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Audiometry, Evoked response categories.
Accuracy Of 40 Hz Automated And Sinusoidal Assr And Tone Burst Abr Thresholds In Normal Hearing Adults Using Kalman Weighted Filtering
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Author : Uzma Shaheen Wilson
language : en
Publisher:
Release Date : 2015
Accuracy Of 40 Hz Automated And Sinusoidal Assr And Tone Burst Abr Thresholds In Normal Hearing Adults Using Kalman Weighted Filtering written by Uzma Shaheen Wilson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Audiometry, Evoked response categories.
Auditory brainstem responses (ABR) and auditory steady state responses (ASSR) are useful for estimating hearing in difficult-to-test populations. For these populations, Kalman-weighted filtering and in-situ pre-amplification can be advantageous for ABR recordings, but little is known about the accuracy of 40-Hz sinusoidal ASSR (sASSR) thresholds using these techniques. The primary aims of this study were to determine the accuracy of: a) 40-Hz sASSR thresholds compared to both toneburst-ABR and behavioral thresholds; and b) automated ASSR (aASSR) in a semi-alert population. Behavioral and electrophysiological thresholds for 500, 2000 and 4000 Hz TB and narrow-band chirp stimuli were obtained using both 2000 and 4000 equivalent sweeps. With 4000 sweeps, significantly better thresholds were obtained for sASSR than TB-ABR for 500 Hz only. With 2000 sweeps, significantly better thresholds were obtained for TB-ABR than for sASSR for 4000 Hz only. 4000 sweep findings demonstrate that 40-Hz sASSR is useful for estimating low-frequency hearing with adequate averaging, whereas 2000 sweep findings suggest sASSR thresholds may be dependent upon response averaging. Multi-frequency screening of aASSR yielded a 61% passing rate using a 20 dB HL stopping level. These findings have clinical applications: a) 40-Hz sASSR may be helpful for low frequency thresholds; b) 40-Hz aASSR multi-frequency screening may be useful, although thresholds should be normed to behavioral thresholds for best results.
Estimation Of Behavioral Hearing Thresholds In Normal Hearing Listeners Using Auditory Steady State Responses
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Author : John Kip Kelly
language : en
Publisher:
Release Date : 2009
Estimation Of Behavioral Hearing Thresholds In Normal Hearing Listeners Using Auditory Steady State Responses written by John Kip Kelly and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Hearing levels categories.
Abstract: The ability to obtain frequency specific information regarding a patient's hearing sensitivity in an objective manner allows the evaluation of patient populations who cannot be tested through traditional behavioral methods. One method for obtaining this information is the auditory steady state response (ASSR). ASSR permits the testing of multiple carrier frequencies simultaneously and both ears simultaneously, unlike the auditory brainstem response (ABR). ASSR replaces subjective examiner interpretation of the response with statistical analyses not subject to the variability of human observers. Unlike ABR which has been in use for decades and utilizes relatively consistent stimuli and test protocols, the ASSR has only been in widespread clinical use for the past 6-8 years and consequently does not have the same level of standardization as ABR. ASSR can be elicited by a variety of stimulus types including but not limited to: (1) Sinusoidal amplitude modulated (SAM) tones, (2) Frequency modulated (FM) tones, (3) Mixed modulation (MM) tones, and (4) Toneburst (TB) trains. The ASSR response is found in the frequency domain at the frequency of modulation and is frequently differentiated from unrelated neural activity using an F-statistic to determine if the amplitude of the line spectra at the modulation frequency is statistically different from the surround physiologic noise. The current study sought to evaluate several common stimuli used in ASSR testing to determine if a more recently introduced stimulus (TB) emerges as a more appropriate stimulus for generating the response. Response detection and collection parameters were standardized so that any differences seen could be attributed to the stimulus. Both behavioral and ASSR thresholds were measured using SAM, MM, and TB stimuli in ten young adults with normal hearing (