Download or read book Detection of Distortion Product Otoacoustic Emissions Using Narrow band Noise Reduction in a School Screening Environment written by Cassie A. Tuell and published by . This book was released on 2009 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Suppression of the Distortion Product Otoacoustic Emission Using Contralateral Narrow Band Masking Noise written by Amal S. Ghabril and published by . This book was released on 1994 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Noise Levels on Transient Evoked Otoacoustic Emissions TEOAE Measures written by Barbara Lynn Wendt-Harris and published by . This book was released on 1997 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Feasibility of Including Distortion Product Otoacoustic Emissions DPOAEs in the Annual Medical Surveillance Test Battery for the Identification of Noise induced Hearing Loss in a Group of Workers in a Beverage Manufacturing Industry written by Tarryn Marisca Reddy and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Use of Distortion Product Otoacoustic Emissions in Comparison to Pure Tone Hearing Screenings in a Preschool Population written by Elizabeth Schehlein and published by . This book was released on 2013 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distortion Product Otoacoustic Emissions (DPOAE) are sensitive to both sensorineural and conductive hearing loss and have the potential to be used as an effective screening tool across all populations, including children. DPOAEs offer a quick and straightforward hearing screening technique for the pediatric population that is not influenced by subjective interpretations, that is highly reproducible, and that offers a more precise tool than pure tone audiometry. A comparison of mean test times and pass/fail rates from 198 preschool participants were compared between two DPOAE screening protocols and a pure tone screening protocol. Significantly less time was needed to conduct the DPOAE screenings compared to the pure tone screenings. Similar pass/fail rates for both DPOAE screening protocols in comparison to the pure tone screening protocol were noted. The results of this study support the use of DPOAEs as a time efficient alternative to traditional pure tone screening protocol.
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 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 Cumulated Index Medicus written by and published by . This book was released on 1998 with total page 1892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Background Noise on Distortion Product Otoacoustic Emissions and Hearing Screenings written by Amy E. Hollowell and published by . This book was released on 2012 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Processes and Otoacoustic Emissions in Hearing written by Geoffrey A. Manley and published by Springer. This book was released on 2010-11-19 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cochlea does not just pick up sound, it also produces sounds of low intensity called Otoacoustic Emissions (OAEs). Sounds produced by healthy ears – either spontaneously or in response to stimuli - allow researchers and clinicians to study hearing and cochlear function noninvasively in both animals and humans. This book presents the first serious review of the biological basis of these otoacoustic emissions.
Download or read book The Use of Distortion Product Otoacoustic Emissions in Comparison to Pure Tone Hearing Screening in a Preschool Population written by Elizabeth Schehlein and published by . This book was released on 2009 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Otoacoustic Emission Testing in the Early Identification of Noise induced Hearing Loss in South African Mineworkers written by Adele Laura Clark and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study assessed the role of otoacoustic emission screening for the early identification of noise-induced hearing loss in South African mineworkers. Transient otoacoustic emissions and distortion product otoacoustic emissions were recorded in 106 noise exposed mineworkers (212 ears) aged between 20 and 55 years, and in 17 non-exposed novice workers (34 ears) aged between 18 and 29 years. All subjects had normal hearing acuity, otoscopic examinations and immittance measurements. Four otoacoustic emission (OAE) measurements were taken per ear and repeated by a second audiologist for the evaluation of inter-test reliability. Age and number of years of noise exposure was additionally evaluated as well as the specificity and sensitivity of the tests for this population group. In general the OAEs were diminished at four KHz for both the exposed and non-exposed groups. Age was found to be the primary predictor of diminished OAE tracings. Poor inter-test reliability was obtained. These results indicate that further research is required within this population group before OAE testing can be implemented for screening for noise-induced hearing loss.
Download or read book Pre clinical Testing of Real time Distortion Product Otoacoustic Emission Devices written by Victoria Wai-Chi Young and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Distortion product otoacoustic emission (DPOAE) testing is a relatively quick, non-invasive, low-cost, and accurate method for assessing cochlear function in infants and young children. The use of current DPOAE devices, that process data through FFT and data-averaging techniques, are limited, in part, due to high ambient noise susceptibility, which lengthens testing time. A DPOAE device that acquires and processes DPOAE signals in real-time, through digital signal filtering, and is less susceptible to ambient noise was developed at the University of Toronto. Pilot studies on adult and child subjects conducted with real-time DPOAE devices at the Hospital for Sick Children indicate that overall testing times are faster for the real-time devices and the test results are comparable to the results from current data-averaging devices. The conclusion is that the real-time DPOAE devices are capable of reliably and accurately diagnosing cochlear function and is less susceptible to noise than data-averaging DPOAE devices.
Download or read book Narrowband Signal Processing Techniques with Applications to Distortion Product Otoacoustic Emissions written by Wing-Kin Ma and published by . This book was released on 1997 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Validation Distortion Product Otoacoustic Emissions Using Telehealth Technology written by Tara K. Winsor and published by . This book was released on 2001 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to determine if the Internet, remote control software and computerized audiology equipment could be used as a telemedicine system to obtain valid distortion product otoacoustic emission (DPOAE) data from a distant site. The study involved sites in Minot, North Dakota and Logan, Utah.
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 Order Effects and Number of Tone Pairs During Simultaneous Distortion Product Otoacoustic Emissions written by Erin Michelle Anderson and published by . This book was released on 2002 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
