Download or read book Auditory Evoked Potentials and Speech in noise Perception written by So Eun Park and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Purpose: This study was designed to investigate (1) the effects of age and hearing loss on auditory neural coding, (2) interrelationships between auditory evoked potentials (AEP) taking place at early and later stage of auditory processing, and (3) electrophysiological correlates of age-related declines in speech-in-noise perception. Methods: 30 young normal-hearing adults (YNH, M=21 years), 26 older adults with near-normal hearing (ONH, M=63.9 years) and 26 older adults with hearing loss (OHL, M=72.8 years) participated in the study. AMLR Pa and N1, P2 and N2 of ALLRs were recorded using two-channel electrode system. 500 Hz tone burst and syllable /ba/ were presented in quiet and in babble at the level of 90 Leq (dBA), accompanied by babble at the level of 65 Leq (dBA). Revised Speech Perception in Noise (R-SPIN) test was conducted to measure speech-in-noise perception. Results: ONH listeners demonstrated significantly enhanced Pa and N1 amplitudes and significantly prolonged Pa, P2 and N2 latencies compared with YNH listeners, indicating the effects of aging. OHI group demonstrated significantly prolonged N2 latencies compared with ONH group, indicating the effects of hearing loss. OHI listeners demonstrated significantly enhanced amplitudes and significantly prolonged latencies across all AEP components compared with YNH listeners, indicating that the combined effects may have stronger impacts on age-related changes in AEP morphology. Significant correlations between the amplitudes of Pa and each component of ALLRs were found in ONH and OHI groups, indicating that enhanced Pa amplitudes correspond with enhanced amplitudes of cortical responses in older listeners. Significant correlations between latencies of Pa and each component of ALLRs were found in all groups, indicating that prolonged Pa latencies correspond with prolonged latencies of cortical responses in all listeners. In both ONH and OHI groups, lower R-SPIN-LP scores are significantly correlated with enhanced Pa, P2, and N2 amplitudes and prolonged N2 latencies, particularly for syllable /ba/. Discussion and Conclusions: Interplay between effects of aging and hearing loss may have stronger impacts on morphological changes in the AEP waveforms. Amplitude-based interrelationships reflect age-related changes in a transfer of neural information between subcortical and cortical auditory network. Latency-based interrelationships indicate the association between neural timings at subcortical and cortical levels. Age-related enhancements of Pa, P2 and N2 amplitudes and age-related prolongations of N2 latencies may serve as electrophysiological correlates of age-related declines in SIN perception.

Download or read book Cortical Associates of Speech in noise Perception from Childhood to Adulthood written by Samantha Jordan Gustafson and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Frequency Following Response written by Nina Kraus and published by Springer. This book was released on 2017-01-09 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume will cover a variety of topics, including child language development; hearing loss; listening in noise; statistical learning; poverty; auditory processing disorder; cochlear neuropathy; attention; and aging. It will appeal broadly to auditory scientists—and in fact, any scientist interested in the biology of human communication and learning. The range of the book highlights the interdisciplinary series of questions that are pursued using the auditory frequency-following response and will accordingly attract a wide and diverse readership, while remaining a lasting resource for the field.

Download or read book Behavioural and Evoked Potential Measures of Auditory Processing In Adults and Children with Unilateral Hearing Loss UHL written by Oscar Cañete Sepulveda and published by . This book was released on 2016 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aims: Aims of this doctoral thesis were to 1) investigate the effects of a unilateral hearing loss (UHL) in adults and children examining several auditory abilities such as localising sound, recognising speech in noise and self-perception of hearing disability in daily life contexts due to this condition, 2) measure cortical auditory evoked potentials (CAEPs) elicited by speech sounds to explore the effects of UHL on brain responses, 3) compare group performance between normal hearing controls and the study group for behavioural and electrophysiological measures, 4) examine auditory function over time in a child with single sided deafness who received a cochlear implant and 5) monitor the pattern of change over time in an adult who had a sudden onset of single side deafness after acoustic neuroma removal and to determine the impact of his hearing device use on auditory function. Methods: Auditory skills were assessed using tests of sound localisation, spatial speech perception in noise, and self-ratings of auditory abilities (abbreviated 7-item version of Listening Inventory for Education, LIFE-7 NZ; Speech, Spatial and Qualities of Hearing questionnaire, SSQ; and Auditory Behaviour in Everyday Life, ABEL). CAEPs in noise (+5 dB signal to noise ratio) elicited by consonant-vowel naturally produced speech sounds were recorded. Performance of children and adults with UHL were compared with normal hearing participants' results. Results: Adults and children with UHL had major, statistically significant difficulties compared to controls recognising speech in noise even when the signal was directed to the good ear, with difficulties more evident for children. Sound localisation was affected by UHL for both adults and children, however there was greater variability in children, particularly for the right ear. Adults and children reported higher levels of hearing difficulties in everyday life listening situations compared to controls. Activities which require concentration and attention were reported as the most challenging (indicating high listening effort). Brain responses showed differential changes as a function of the age. Adults with a right ear hearing loss (left ear stimulus presentation, to the better ear) showed a more symmetric hemisphere activity (N1 response) across all stimuli. CAEPs for adults with a left ear hearing loss were similar to normal hearing controls as these participants showed larger activity for electrodes located over the hemisphere contralateral to the stimulated ear (right ear presentation). Normal hearing children showed a left hemisphere dominance (P1 cortical response) regardless of the ear of stimulus presentation, and larger responses at frontal and central locations. Children with UHL did not show this dominance. Overall, for left ear UHL, P1 responses were smaller compared to right ear UHL. N250 responses were larger frontally in normal hearing children, whereas children with left ear UHL had more symmetric CAEP activity. Conclusions: People with UHL have a range of listening difficulties such as localising sound in the horizontal plane and recognising speech in noise. Children and adults and the children's parents reported difficulties in different contexts. Questionnaire data indicated that the ability to recognise speech in different contexts and spatial hearing were perceived as most affected by a UHL for adults. Children reported difficulties in school settings mainly for noisy situations. Participants with UHL reported higher levels of need for concentration or attention during listening activities. CAEPs showed changes within the auditory cortex for children and adults. Atypical responses were observed for both groups compared to normal hearing individuals. CAEPs would be a useful tool for assessing auditory cortical function in people with UHL, providing information about the status of the neural encoding of the auditory signals to support the behavioural evidence for auditory difficulties in this population.

Download or read book Auditory Evoked Potentials written by Robert F. Burkard and published by Lippincott Williams & Wilkins. This book was released on 2007 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by experts with extensive clinical and scientific experience, this comprehensive textbook presents the state of the art in auditory evoked potentials. Opening chapters explain the nature of electrical fields that generate surface recorded potentials, summarize the imaging modalities that complement evoked potential studies, and review acoustics and instrumentation. Major sections examine the anatomy and physiology of the auditory periphery, brainstem, and cortex and the principles and clinical applications of auditory, myogenic, visual, somatosensory, and vestibular evoked potentials. Chapters present hands-on laboratory exercises and clinical case studies. A full-color insert includes 3D images from multi-channel evoked potentials and functional imaging.

Download or read book Human Auditory Development written by Lynne A. Werner and published by Routledge. This book was released on 2019-03-13 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book overviews auditory development in nonhuman species and proposes a common time frame for human and nonhuman auditory development. It attempts to explain the mechanisms accounting for age-related change in several domains of auditory processing.

Download or read book Attention written by Neville Moray and published by Routledge. This book was released on 2017-03-27 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The early years of modern experimental psychology were marked by a considerable amount of research on attention, and much work was carried out in the laboratories of Wundt, Titchener and Helmholtz. For various reasons, research on attention declined from 1920 until the 1950s. Under the early philosophy of behaviourism, attention became suspect as a ‘mentalistic’ concept. At the time of original publication in 1969, however, much work had been done to quantify and make objective research in this area. This was of increasing importance in a world dominated by communication networks, and ‘man-machine’ systems, in which the human element is the weakest link due to the limits on the rate at which man can handle information. Following the publication of Broadbent’s Perception and Communication in 1958, work on attention had begun to pour from an ever increasing number of laboratories. This book is dedicated to summarising what we knew, and attempts to survey the behavioural research in vision and hearing which throw light on how we share and direct attention, what are the limits of attention, to make some general methodological recommendations, to review current theories of the time, and to provide a guide to the relevant physiological work. As far as possible, work on memory has been omitted. A bibliography of the major work to the spring of 1969 is included.

Download or read book The Auditory Brainstem Response written by John T. Jacobson and published by Taylor & Francis Group. This book was released on 1985 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Auditory Evoked Potentials written by Linda J. Hood and published by . This book was released on 1986 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Central Auditory Processing Disorders written by Gail D. Chermak and published by Singular. This book was released on 1997 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the authors' research over the past decade into the neurobiology of central auditory processing and its linkage with language and cognitive systems, offers information on diagnosing, assessing, and managing disorders of the processing, emphasizing preschool-age and school-age children and.

Download or read book Neural Correlates of Quality Perception for Complex Speech Signals written by Jan-Niklas Antons and published by Springer. This book was released on 2015-02-11 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book interconnects two essential disciplines to study the perception of speech: Neuroscience and Quality of Experience, which to date have rarely been used together for the purposes of research on speech quality perception. In five key experiments, the book demonstrates the application of standard clinical methods in neurophysiology on the one hand and of methods used in fields of research concerned with speech quality perception on the other. Using this combination, the book shows that speech stimuli with different lengths and different quality impairments are accompanied by physiological reactions related to quality variations, e.g., a positive peak in an event-related potential. Furthermore, it demonstrates that – in most cases – quality impairment intensity has an impact on the intensity of physiological reactions.

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 Auditory Competence in Early Life written by Rita B. Eisenberg and published by . This book was released on 1976 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modulating Auditory Evoked Potentials and the Perception of Inner Speech written by Brigitte Kaufmann and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book AUDITORY EVENT RELATED POTENTIALS RECORDED DURING PASSIVE LISTENING AND SPEECH PRODUCTION written by Shannon D. Swink and published by . This book was released on 2010 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: What is the role of audition in the process of speech production and speech perception? Specifically, how are speech production and speech perception integrated to facilitate forward flowing speech and communication? Theoretically, these processes are linked via feedforward and feedback control subsystems that simultaneously monitor on-going speech and auditory feedback. These control subsystems allow self-produced errors to be detected and internally and externally generated speech signals distinguished. Auditory event-related potentials were utilized to examine the link between speech production and perception in two experiments. In Experiment 1, auditory event-related potentials during passive listening conditions were evoked with nonspeech (i.e., tonal) and natural and synthetic speech stimuli in young normal-hearing adult male and female participants. Latency and amplitude measures of the P1-N1-P2 components of the auditory long latency response were examined. In Experiment 2, auditory evoked N1-P2 components were examined in the same participants during self-produced speech under four feedback conditions: nonaltered, frequency altered feedback, short delay auditory feedback (i.e., 50 ms), and long delay auditory feedback (i.e., 200 ms). Gender differences for responses recorded during Experiments 1 and 2 were also examined. Significant differences were found for P1-N1-P2 latencies and for P1-N1 and N1-P2 amplitudes between the nonspeech stimulus compared to speech tokens and for natural speech compared to synthetic speech tokens in Experiment 1. These findings were attributed to differences in the spectro-temporal characteristics of the tokens. In Experiment 2, there were no significant differences in N1-P2 latencies and amplitudes across feedback conditions. To examine differences between component latency and amplitude during passive listening and active speaking, responses elicited via passively presented self-produced nonaltered and frequency altered tokens were compared to the nonaltered and frequency altered feedback active conditions. Significantly, smaller N1-P2 component amplitudes were recorded during the active versus passive speaking conditions. This finding is in accordance with research supporting feedforward and feedback theories. To further understanding of cortical processing during speech production and speech perception additional investigations are warranted in both those with normal speech and language and those with pathological speech and language, specifically, those with a speech motor disorder such as developmental stuttering.

Download or read book Assessment of Central Auditory Dysfunction written by Marilyn L. Pinheiro and published by . This book was released on 1985 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acceptable Noise Levels and Electrophysiological Measures in Listeners with Hearing Impairment written by Joanna Webster Tampas and published by . This book was released on 2007 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acceptable noise level (ANL) is a measure of a listener's acceptance of background noise when listening to speech. A consistent finding in research on ANL is large intersubject variability in the acceptance of background noise. This variability is not related to age, gender, hearing sensitivity, type of background noise, speech perception in noise performance, cochlear responses, or efferent activity of the medial olivocochlear bundle pathways. Moreover, across ANL studies, young and elderly individuals with both hearing impairment and normal-hearing sensitivity display equivalent means and ranges for ANLs, indicating that acceptance of background noise may be an inherent characteristic of the individual that does not change with age, or the development of hearing loss. In the present study, auditory evoked potentials and encephalography (EEG) were examined in 40 adults with mild-to-moderately-severe sensorineural hearing impairment with low, mid-range, and high ANLs to determine whether or not differences in judgments of background noise are related to differences measured in aggregate physiological responses from the auditory nervous system. Group differences in the auditory brainstem response, auditory middle latency, cortical, auditory late latency, and EEG responses indicate that differences in more central regions of the nervous system contribute to the variability in the willingness of a listener with hearing impairment to accept background noise when listening to speech.