Download or read book Repeatability and Variability of Distortion Product Otoacoustic Emissions in Normally Hearing Young Adults written by Samantha Bennett and published by . This book was released on 1994 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Variation in the Relative Levels of the Primary Tones on the Amplitude of the Distortion Product Otoacoustic Emissions of Normal Hearing Subjects written by Romayn L. Jones and published by . This book was released on 1997 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distortion Product Otoacoustic Emission Components as a Potential Marker of Preclinical Noise Injury to the Cochleas written by Gavin Coad and published by . This book was released on 2013 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: Excessive noise exposure can lead to noise induced hearing loss (NIHL) and hearing conservation programmes are essential to prevent occupational hearing loss. These programmes rely on monitoring hearing using pure tone audiometry. However, audiometry is not very sensitive and only detects a permanent hearing loss after significant injury has occurred. Distortion product otoacoustic emissions (DPOAEs) are generated by cochlear non-linear physiological processes associated with the outer hairs cells that underpin detection of sound, thus DPOAEs have promise as a tool to detect and monitor cochlear hair cell damage in NIHL. The DPOAE has two components, one generated at the point of interaction between the primaries (generator), the second reflected from the characteristic place of the DPOAE frequency (reflected). Some of the variability in DPOAE is believed to result from the interaction of the components, termed the DPOAE fine structure, and extracting the components may reduce the variability and improve the sensitivity of the DPOAE to injury. This study investigated the feasibility and reliability of a new approach to separating the DPOAE components, and their relationship to hearing measures in people with and without exposure to noise. Methods: Logarithmically swept primaries with a least-squares-fit (LSF) analysis were used to separate the DPOAE components, and the approach was evaluated and optimised in normally hearing subjects. Two studies followed that investigated the components of the DPOAE and how they correlate with behavioural measures of hearing. Firstly, in subjects (n=16) with 'normal' hearing (20 dB HL), both behavioural measures of the auditory filter (notched-noise maskers) and threshold were compared to the components of the DPOAE. In the second study subjects (108 men) with a mixture of thresholds, noise exposure and age were recruited and then divided into two equal sized and age matched groups (noise exposed and non-noise exposed) based on a detailed history of self-reported noise exposure. The DPOAE components were compared to audiometric threshold and behavioural measures of compressive nonlinearity using Schroeder-phase masked thresholds. Results: Overall, psychoacoustic measures of auditory filter and cochlear non-linearity were influenced by audiometric threshold, and exhibited no relationship with DPOAE level in subjects with 'normal' hearing (
Download or read book Otoacoustic Emissions written by Martin S. Robinette and published by Thieme. This book was released on 2002 with total page 488 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 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 Growth of Distortion Product Otoacoustic Emissions in Normal Hearing and Hearing Impaired Adults written by Debra M. Wilson and published by . This book was released on 1993 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of Distortion Product Otoacoustic Emission Amplitudes Related to Aging and Middle Ear Resonant Frequency in Ears of Adults with Normal Hearing written by Fabiola A. Castro-Lauman and published by . This book was released on 2013 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Audiologie written by and published by . This book was released on 1993 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Journal of auditory communication.
Download or read book Distortion Product Otoacoustic Emissions in Normal Hearing Humans Reveal Gender and Age Differences written by Christine E. Haugh and published by . This book was released on 1995 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gender Differences and Phase Delay Measurements for Distortion Product Otoacoustic Emissions in Normal Hearing Adults written by Cheryll Anne Benois Marie and published by . This book was released on 2001 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relations of Race and Gender to Distortion Product Otoacoustic Emissions written by Lara L. Gingerich and published by . This book was released on 1998 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Effect of Age Maturation on Distortion Product Otoacoustic Emissions in Normal Hearing School Children Aged 4 to 10 Years Old written by Kesara Kehmawut and published by . This book was released on 2000 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measures of Distortion Product Otoacoustic Emissions and Frequency Resolution in Clinically Normal Hearing Subjects with a History of Noise Exposure written by Janet Caffee and published by . This book was released on 1997 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sources of Variability in Distortion Product Otoacoustic Emissions written by Cassie A. Garner and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
