Download or read book A Longitudinal Analysis of Noise induced Hearing Loss Using Distortion Product Otoacoustic Emission written by Chang Liu and published by . This book was released on 2011 with total page 224 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 The Change in Distortion Product Otoacoustic Emissions in Subjects at Risk for Noise induced Hearing Loss written by Meaghan Patrick Reed and published by . This book was released on 2002 with total page 104 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 Advances in Noise Research Volume 1 written by Deepak Prasher and published by John Wiley & Sons. This book was released on 1998 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series entitled Advances in Noise Research has developed from the European Commission Concerted Action Programme on Protection Against Noise (PAN) The first volume in the series is devoted to the biological effects of noise and covers six main topics: physiological mechanisms, diagnosis, otoacoustic emissions, tinnitus, pharmacology and non-auditory effects in relation to noise.
Download or read book Longitudinal Elasticity of the Cochlear Partition and Distortion Product Otoacoustic Emissions written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Occupational Noise and Age a Longitudinal Study of Hearing Sensitivity written by Leoni Margaretha Grobler and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The interaction between age and noise and their individual effects on hearing is complex, making it difficult to distinguish between noise-induced hearing loss and agerelated hearing loss at an individual level. This retrospective cohort study aimed to determine the decline in hearing sensitivity in noise-exposed mineworkers as opposed to non-noise-exposed mineworkers over time to evaluate the combined and individual contributions of noise exposure and age. A mixed effects regression analysis was applied to longitudinal audiological data from a group of mineworkers in South Africa. Four serial (annual) audiograms of 2,583 mineworkers were utilised. Data of a non-noise-exposed group (n=951) and a group exposed to underground noise (©Ø0́ʻ℗Æ85 dBA) (n=1632) were included. Results indicated that base values were significantly higher for the noise-exposed versus non-noise-exposed group, for the low-frequency average (LFA) of 0.5, 1 and 2 KHz (16.1 dB HL versus 11.1 dB HL), and high-frequency average (HFA) of 3, 4 and 6 KHz (25.7 dB HL versus 18.5 dB HL). These results may be indicative of previous noise damage in the noise-exposed group obtained before occupational noise limitations and personal hearing protection use were enforced through legislation in 2001. All year-to-year increases in mean hearing thresholds were statistically significant (p-values of
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 Otoacoustic Emissions and Asymmetrical Noise induced Hearing Loss written by Thomas R. Coccagna and published by . This book was released on 1994 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the International Symposium on the Effects of Noise on Hearing Scientific Basis of Noise Induced Hearing Loss 5th Held in Goetborg Sweden on 12 14 May 1994 written by and published by . This book was released on 1996 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological Basis of Noise-Induced Hearing Loss, Sensory Cell Regeneration and Functional Recovery, The Effects of Acoustic Trauma, Other Cochlear Injury, and Death on Basilar-Membrane Responses to Sound, Excitotoxicity and Plasticity of IHC-Auditory Nerve Contributes to Both Temporary and Permanent Threshold shift, Noise-Induced Expression of Heat Shock Proteins in the Cochlea, Changes in Gene Expression Following Temporary Noise-Induced Threshold Shift, Genetic Susceptibility to Noise-Induced Hearing Loss in Mice, Effects of Acoustic Overstimulation on Distortion-Product and Transient-Evoked Otoacoustic Emissions, Physiological Correlates of Spontaneous Otoacoustic Emissions Induced by Acoustic Trauma, Cochlear Blood Flow Changes With Short Sound Stimulation, Individual Differences in Peripheral Sound Transfer Function, Relationship to NIHL, Experimental Studies of Noise-Induced Hearing Loss Underwater Hearing and Occupational Noise Exposure Threshold Shift Dynamics Following Interrupted Impact or Continuous Noise Exposure: A Review, Protection from Continuous, Impact, or Impulse Noise Provided by Prior Exposure to Low-Level Noise, Efferent and Priming Modulation of Noise-Induced Hearing Loss, Protection Against Temporary and Permanent Noise-Induced Hearing Loss by Sound Conditioning Psychophysical and Evoked Response Studies of Aged Subjects: Masking by Low-Pass Noise, Interactions Between Age-Related and Noise-Induced Hearing Loss, Application of Frequency and Time Domain Kurtosis to Assessment of Complex, Time-Varying Noise Exposures.
Download or read book Otoacoustic Emissions written by Martin S. Robinette and published by Thieme. This book was released on 2011-01-01 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new edition of a best-selling text with a CD-ROM by Dr. David Kemp The new edition of the best-selling Otoacoustic Emissions: Clinical Applications provides a thorough review of the complex physiology of the ear and clinical applications of the latest research on otoacoustic emissions. The book features new chapters on such important topics as middle ear function enhanced by reflectance measurements and the use of otoacoustic emissions as a preclinical measure of susceptibility to hearing loss. Accompanying the book is a CD-ROM developed by Dr. David Kemp, Ph.D., which contains animations, movies, and interviews. The CD-ROM serves as an indispensable aid to both teaching and reviewing key concepts. From physiological phenomena to diagnostic and clinical applications, this book is a complete reference on otoacoustic emissions that will provide graduates in audiology and residents in otolaryngology and otology with all the essential information needed for research and professional practice.
Download or read book Alteration of Susceptibility to Noise induced Hearing Loss Through Interruption of Sympathetic Inputs to the Cochlea written by and published by . This book was released on 2005 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1966, sympathetic fibers were identified in the cochlea, terminating on the cochlear artery and near the auditory nerve fibers at the level of the habenula perforata (Spoendlin and Lichtensteiger, 1966). The cochlear sympathetic fibers originate in the stellate ganglion (SG) and the superior cervical ganglion (SCG). Both sets of fibers have a demonstrated effect on cochlear blood flow (CBF) (Laurikainen et al., 1993, 1994, 1997; Ren et al., 1993). The SCG fibers have been implicated in modulation of susceptibility to noise-induced hearing loss (NIHL) (Borg, 1982; Hildesheimer et al., 1991; Horner et al., 2001; Hildesheimer et al., 2002). Ablation of the SCG generally leads to protection from NIHL, but the previous studies do not separate the effects of SCG ablation on temporary and permanent threshold shift (TTS and PTS), and there is also some question about whether the effect is unilateral or bilateral. In the current study, we explore the effects of unilateral and bilateral SCG ablation on threshold shift from noise exposure, as measured with inferior colliculus (IC) evoked potentials, distortion product otoacoustic emissions (DPOAE), and outer hair cell (OHC) loss. SCGs were isolated at the level of the bifurcation of the carotid artery and removed unilaterally in 15 chinchillas. Another 8 chinchillas underwent bilateral ablation. 20 animals were employed as sham controls. Each animal was implanted with IC electrodes and exposed to an octave band noise centered at 4 kHz for one hour at 110 dB SPL. Hearing thresholds and DPOAE input/output functions were measured at six hours, one day, three days, one week, and three weeks after the noise. After the three-week test, animals were sacrificed and OHCs were counted for cochleograms. Results showed improved recovery of DPOAE amplitudes after noise exposure in ears that underwent SCGectomy, as well as lower evoked potential threshold shifts relative to sham controls. Effects of SCGectomy on OHC loss were small. Results of the study suggest that sympathetic fibers do exert some influence on susceptibility to noise, but the influence may not be a major one.
Download or read book Disorders of Peripheral and Central Auditory Processing written by Gastone G. Celesia and published by Elsevier Health Sciences. This book was released on 2013-12-12 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Noise and Military Service written by Institute of Medicine and published by National Academies Press. This book was released on 2006-01-20 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Institute of Medicine carried out a study mandated by Congress and sponsored by the Department of Veterans Affairs to provide an assessment of several issues related to noise-induced hearing loss and tinnitus associated with service in the Armed Forces since World War II. The resulting book, Noise and Military Service: Implications for Hearing Loss and Tinnitus, presents findings on the presence of hazardous noise in military settings, levels of noise exposure necessary to cause hearing loss or tinnitus, risk factors for noise-induced hearing loss and tinnitus, the timing of the effects of noise exposure on hearing, and the adequacy of military hearing conservation programs and audiometric testing. The book stresses the importance of conducting hearing tests (audiograms) at the beginning and end of military service for all military personnel and recommends several steps aimed at improving the military services' prevention of and surveillance for hearing loss and tinnitus. The book also identifies research needs, emphasizing topics specifically related to military service.
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 Noise Induced Hearing Loss written by Colleen G. Le Prell and published by Springer Science & Business Media. This book was released on 2011-10-30 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exposure to loud noise continues to be the largest cause of hearing loss in the adult population. The problem of NIHL impacts a number of disciplines. US standards for permissible noise exposure were originally published in 1968 and remain largely unchanged today. Indeed, permissible noise exposure for US personnel is significantly greater than that allowed in numerous other countries, including for example, Canada, China, Brazil, Mexico, and the European Union. However, there have been a number of discoveries and advances that have increased our understanding of the mechanisms of NIHL. These advances have the potential to impact how NIHL can be prevented and how our noise standards can be made more appropriate.
Download or read book Tinnitus Pathophysiology and Treatment written by Aage R. Moller and published by Elsevier. This book was released on 2007-11-16 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding tinnitus and treating patients with tinnitus must involve many disciplines of basic science and clinical practice. The book provides comprehensive coverage of a wide range of topics related to tinnitus including its pathophysiology, etiology and treatment. The chapters are written by researchers and clinicians who are active in the areas of basic science such as neurophysiology and neuroanatomy and in clinical specialties of psychology, psychiatry, audiology and otolaryngology.* Comprehensive coverage of the pathology and cause of tinnitus including genetics * Hyperacusis, phonophobia and other abnormalities in perception of sounds * The role of neural plasticity in tinnitus
