Download or read book Suppression of Distortion Product Otoacoustic Emissions by Contralateral Sound written by Julian Hinvest and published by . This book was released on 1997 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frequency Specificity of Contralateral Suppression of Distortion Product Otoacoustic Emissions written by Lisa Arnelle Ross and published by . This book was released on 2013 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The frequency specificity of the contralateral suppression effect as demonstrated in DPOAEs was measured in 20 adult participants using contralateral stimuli consisting of white noise, and. 5, 1, 2, and 3 kHz tones with presentation levels of 40, 50, and 60 dB SPL. A significant suppression effect was found with white noise in the low frequencies (1.125 to 2.531 kHz) as well as higher frequencies (5.062 to 6.328 kHz). While not reaching a level of significance, 2 and 3 kHz demonstrated a similar suppression as white noise in the higher frequencies (5.062 to 6.328 kHz) and a non-significant enhancement effect was observed in the low frequencies (2.015 to 2. 812 kHz). Future studies of contralateral suppression should examine BBN with various high frequency cut offs in order to more fully examine these phenomenon.
Download or read book A Comparison Between Contralateral Suppression in Cochlear Microphonics and Distortion Product Otoacoustic Emissions written by Fadi Jamil Najem and published by . This book was released on 2011 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present study examined and compared the effect of the contralateral stimulation of the auditory efferent system on the cochlear microphonics (CM) versus the distortion product otoacoustic emissions (DPOAEs). The DPOAEs and the CM were recorded from the right ear of 16 normal-hearing young female adults with and without 60 dB sound-pressure-level (SPL) broad band noise (BBN) in the left ear. DPOAEs were obtained at 0.5, 2, and 4 kHz, with L1 = 65 dB SPL and L2 = 50 dB SPL, and f2/f1 ratio = 1.2. The CM was recorded from the right tympanic membrane at 90 dB SPL using three stimuli (click and 0.5 and 2 kHz tone bursts) and two polarities (condensation and rarefaction). Results showed both suppression and enhancement of the DPOAE and the CM responses in the presence of BBN, but the effect was not statistically significant at any of the tested conditions. When the ratio of the suppression or enhancement was used, the effect was marginal for the 2 kHz TB stimulus of the CM. Results also showed a possible relation between the stimulus polarity and the type of effect on the CM. In conclusion, there is some evidence that the efferent system is involved in the suppression and enhancement of the CM, mainly at 2 kHz TB. This might be due to the nature of the CM recording from the basal turn of the cochlea. This study provided the first descriptions of the contralateral suppression of CM in humans. More research is needed to enhance the sensitivity of the CM test methodology to examine the function of the efferent system clinically.
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 Contralateral Suppression of Distortion Product Otoacoustic Emissions in Children with and Without Auditory Processing Disorders written by Blake Edward Butler and published by . This book was released on 2008 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 An Investigation of the Suppression of Otoacoustic Emissions by Contralateral Sound written by Andrea Susan Kelly and published by . This book was released on 1993 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contralateral Suppression of Distortion product Otoacoustic Emissions written by Douw Van der Merwe and published by . This book was released on 2006 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Suppression of Tone burst Evoked Otoacoustic Emissions by Contralateral Sound Exposure written by and published by . This book was released on 1994 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Bone Conduction Transducer Placement on Distortion Product Otoacoustic Emissions written by Julie L. Hazelbaker and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The purpose of this study was to develop a technique to determine the magnitude of bone conducted sound in the cochlea when stimuli are delivered from three different locations on the head. Distortion product otoacoustic emissions (DPOAE) at 1000 and 2000 Hz were used as tools to determine cochlear response to stimuli introduced via air conduction and bone conduction in three subjects. The bone conduction transducer was moved to three head locations (ipsilateral mastoid, contralateral mastoid and forehead). The intensity of the emissions elicited was compared. The differences in DPOAE magnitude created by varying the location of the bone conduction transducer were compared with behavioral threshold differences with the same transducers at the same locations. It was assumed that results of behavioral measures would provide a prediction of the relationship between air and bone conducted DPOAE. However, in the current study, this was not the case. Behavioral bone conduction threshold data did not predict differences in DPOAE at different bone conduction transducer locations. This was a somewhat surprising result and should be considered further in future studies examining the properties of DPOAE elicited by bone conduction. Additionally, a wide band noise masker was introduced to the non-test ear when bone conducted stimuli were introduced to make DPOAE and behavioral test conditions as similar as possible. No great suppression effects were noted across subjects for either frequency. This was likely due to the shape and intensity of the contralateral masked used.
Download or read book The Effect of Noise Bandwidth on the Contralateral Suppression of Transient Evoked Otoacoustic Emissions PHD written by David Scott Velenovsky and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of the Influence of Contralateral Noise on Distortion Product Otoacoustic Emissions Among an Aging Population written by Jenne L. Tunnell and published by . This book was released on 1998 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contralateral Suppression of Otoacoustic Emissions written by Brad Baldwin and published by . This book was released on 1998 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Auditory Efferent System New Insights from Cortex to Cochlea written by Paul H. Delano and published by Frontiers Media SA. This book was released on 2016-09-06 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main function of the sensory systems is the transducing of external stimuli into bioelectrical signals, which are conducted through afferent pathways from sensory epithelia to the brain. However, it is known that descending projections are ubiquitous in the different sensory modalities, and in the case of auditory efferents connect the cerebral cortex with sensory receptor cells. Several functions have been attributed to the efferent system, including protection to acoustic trauma, unmasking of auditory stimuli in background noise, balance of interaural sensitivity and some cognitive functions like modulation of cochlear sensitivity during selective attention to auditory or visual stimuli. In addition there is evidence of a possible involvement of the efferent system in the etiology or treatment of some clinical pathologies like tinnitus. In this e-book, entitled “Auditory Efferent System: New Insights from Cortex to Cochlea”, we aimed to give an overview of the advances concerning the descending projections from the auditory cortex to subcortical nuclei and the olivocochlear system. In addition, different theoretical proposals of efferent functions are presented. We think that this e-book is an important contribution to the understanding of the efferent system in mammals, merging auditory-cortex literature with studies performed in the olivocochlear system.
Download or read book The Correlation Between Hair and Eye Colour on Contralateral Suppression of Otoacoustic Emissions written by Marike Klopper and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Noise-induced hearing loss (NIHL) is becoming increasingly prevalent amongst young adults leading to a whole series of social and public health problems. Genetics and environmental factors frequently influence individual℗þs susceptibility to hearing loss. It is postulated that melanin in the inner ear is related to individual℗þs susceptibility to NIHL. General pigmentation in turn, it is suspected to be related to the amount of pigmentation in the inner ear. The amount of melanin in the inner ear is said to modulate the endocochlear potential and provide an otoprotective effect. The current study aimed to determine the relationship between the contralateral suppression of otoacoustic emissions (CSOAE) in individuals with different hair and eye colour, and temporary emission shift (TES) after short-term noise exposure. Method: The hearing sensitivity of young adults were determined by using pure tone audiometry followed by CSOAE℗þs and distortion product otoacoustic emissions (DPOAE) before listening to music for one hour individually. Pure tone audiometry and DPOAE℗þs were repeated after short-term music exposure to determine the amount of TES and temporary threshold shift (TTS). Twenty-five normal-hearing adults, ranging from 18 to 28 years (Mean age: 21.64, SD: 1.80) were recruited for the current study. A quasi-experimental repeated within subject℗þs measurement design was used to compare the CSOAE in subjects with different hair and eyes colour with TES after noise exposure for one hour. Results: No statistically significant difference was measured between the participants with brown eyes and brown hair, and the participants blue eyes and blond hair, efferent suppression as measured by CSOAE℗þs. The blue eyes with blond hair had a temporary threshold shift (TTS) at 4000 Hz as well as a TES in at 2000 Hz after short-term noise exposure. Conclusion: CSOAE℗þs were therefore unable to predict which group of individuals were more susceptible to NIHL after short-term noise exposure.
Download or read book Cochlear Mechanisms and Otoacoustic Emissions written by F. Grandori and published by . This book was released on 1990 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: '... recommended to scientists interested in the fields of cochlear mechanics and otoacoustic emissions.` International Journal of Pediatric Otorhinolaryngology
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:
