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Author: Bruna Silveira Sobiesiak
Publisher:
ISBN:
Category : Audiometry
Languages : en
Pages : 98
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Book Description
Author: Bruna Silveira Sobiesiak
Publisher:
ISBN:
Category : Audiometry
Languages : en
Pages : 98
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Book Description
Author: Robyn Helena Shanley
Publisher:
ISBN:
Category :
Languages : en
Pages : 176
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Book Description
This study was conducted to determine if the phenomenon of binaural interference occurs in normal hearing children. To investigate the possible presence of binaural interference, comparisons of the participants' right, left, and binaural performance was measured for word recognition test scores and speech-in-noise test scores. To provide evidence of the possible breakdown within the auditory system associated with binaural interference, sub-cortical and cortical tests were used within the test battery. Tonal and speech masking level difference tests (MLDs) were used as sub-cortical tasks. The pitch pattern sequence [motor (MPPS) and verbal (VPPS) response] tests were used as cortical tasks. Normative data was developed for the masking level difference tests and pitch pattern sequence tests. A total of 96 normal hearing children, aged 7 years, 0 months to 12 years, 11 months, were participants. Children were grouped according to age with 16 participants in each of the 6 age groups. Word recognition scores were obtained using the Northwestern University Children's Perception of Speech (NU-CHIPS) test. The Bamford-Kowal-Bench Speech-in-Noise (BKB-SIN) Test was used for sentence-in-noise testing. One of 96 participants (P92) showed significant binaural interference on word recognition testing. Mean group scores (ages 7- 12 years) for the VPPS test ranged from 81.5% to 97.8%. Mean group scores (ages 7- 12 years) for the MPPS test ranged from 87.1% to 98.1%. The mean masking level differences were 7.3 dB for speech stimuli and 12.81 dB for tonal stimuli. Although our original hypothesis, that a small percentage of children would demonstrate binaural interference, was not supported in this study, the data provides a foundation for future research with other populations, such as hearing impaired children and children with (central) auditory processing disorders. The identification of binaural interference in children will provide the audiologist with valuable information useful for hearing aid fittings and counseling of parents with (central) auditory processing disordered children. In addition, this study provides normative data for the pitch pattern sequence tests and the speech and tonal masking level difference tests in children.
Author: James Jerger
Publisher: Plural Publishing
ISBN: 163550077X
Category : Medical
Languages : en
Pages : 137
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Book Description
Binaural interference occurs when the speech input to one ear interferes with the input to the other ear during binaural stimulation. The first published study on binaural interference twenty-five years ago demonstrated that some individuals, particularly older individuals, perform more poorly with two hearing aids than with one and/or more poorly with binaural than monaural stimulation on electrophysiologic as well as behavioral measures. Binaural interference is relevant to every audiologist because it impacts the successful use of binaural hearing aids and may explain communicative difficulty in noise or other challenging listening situations in persons with normal-hearing sensitivity as well as persons with hearing loss. This exciting new book written by two highly respected audiologists first traces the history of its study by researchers, then reviews the evidence, both direct and indirect, supporting its reality. This is followed by a discussion of the possible causes of the phenomenon and in-depth analysis of illustrative cases. The authors outline a systematic approach to the clinical detection, evaluation and amelioration of individuals who exhibit binaural interference. Suggestions are furnished on improved techniques for evaluation of the binaural advantage in general and on sensitized detection of the disorder in particular. The book ends with recommendations for future directions. Given the adverse impact of binaural interference on auditory function and its occurrence in a significant subset of the population with hearing loss, as well as in some individuals with normal-hearing sensitivity, research on binaural interference only recently has begun to flourish, and adaptation of audiologic clinical practice to identify, assess, and manage individuals with binaural interference has yet to become widespread. The authors intend for the book to provide impetus for pursuing further research and to encourage audiologists to explore the possibility of binaural interference when patient complaints suggest it and when performing audiologic evaluations. The book is intended for practicing clinical audiologists, audiology students, and hearing scientists.
Author: Huiming Zhang
Publisher: Frontiers Media SA
ISBN: 2832539823
Category : Science
Languages : en
Pages : 277
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Book Description
Hearing is dependent on neural processing of acoustic cues obtained by the left and right ears. Neural signals driven by the two ears are integrated at multiple levels of the central auditory system, which enables animals including humans to perform various functions including localization of a sound source. A natural listening environment typically contains sounds from multiple sources. These sounds can have different spectral and temporal features and occur at either the same or different time. Integration can happen among neural signals elicited by the same or different sounds. The way of integration can greatly affect how individual sounds are sensed and perceived. Functions such as auditory grouping and stream segregation, which are central to establishing coherent auditory images in a complex listening environment, are highly dependent on the way of integration. Binaural hearing is complicated by individual differences and developmental changes in head and pinna shape/size as binaural cues can be affected by these differences and changes. Furthermore, neural processing of binaural cues can be influenced by hearing impairments and the use of hearing aids and cochlear implants. These factors likely require a listener to optimize the use of binaural cues through learning and to use plastic changes in the nervous system to perform the optimization. Great strides have been made in understanding binaural processing in normal and impaired auditory systems. This Research Topic aims to highlight some of the latest findings in the following areas: 1) Animal behavioral and human psychoacoustical studies of binaural hearing; 2) Neural encoding and processing of binaural cues and structural as well as neurophysiological bases of such encoding and processing; 3) Contribution of binaural neural processing to auditory functions such as sound-source localization, binaural fusion, binaural interference, spatial release from masking, auditory grouping, and auditory stream segregation; 4) Computational models of binaural processing; 5) Learning and plastic changes in binaural processing following hearing loss or alterations of acoustic environment and structural as well as physiological bases of these behavioral changes; 6) Clinical aspects of binaural processing including application of processing strategies, including research on the benefits of bilateral cochlear implantation, and the neural correlates thereof
Author: Brady Schwab
Publisher:
ISBN:
Category : Hearing disorders
Languages : en
Pages : 112
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Understanding speech in the presence of background noise is a common complaint of middle-aged and older listeners with clinically normal audiograms. There is great interest in understanding how age-related changes in auditory physiology make it harder for older adults to understand speech in difficult listening situations, compared to young listeners. It was recently reported that middle-aged and older normal-hearing listeners showed frequency-dependent, age-related declines in the behavioral and physiological detection of interaural phase differences (Grose & Mamo, 2010; Ross et al, 2007). There is also evidence of an age-related, frequency-dependent decline in the frequency-following response (FFR) (Clinard et al., 2010), an auditory evoked potential dependent on phase-locked neural activity (Worden & Marsh, 1968). Age-related declines in binaural processing may be related to age-related declines in phase locking. This study used the frequency-following response (FFR) to examine monaural and binaural phase locking in subjects of two groups; younger and middle-aged. Responses were obtained from 300 ms toneburst stimuli at four frequencies (500, 750, 1000, and 1125 Hz) at an intensity of 80 dB SPL. FFRs were analyzed for response amplitude, binaural amplitude differences, and stimulus-to-response cross-correlations. Results showed FFR amplitude decreased as frequency increases and, at 500 Hz, the summed left and right monaural FFR amplitudes were smaller than the binaural FFR amplitude, which is in contrast to previous literature (Clinard, 2010; Fowler, 2004; Krishnan & McDaniel, 1998). Results further indicated that the stimulus-to-response correlation coefficient is greatest for 500 Hz and declines as frequency increases. There was no significant difference between the age groups but perhaps a broader age range including older adults would show the hypothesized amplitude differences between groups. Further, results may be different than expected due to minimal difference between summed monaural and binaural processing at 750, 1000, and 1125 Hz. When looking at the data there is a larger difference between groups at 1125 Hz and, while it is not significantly different, it may be that a broader frequency range (e.g., 1250 Hz or above) and age range (e.g. 0 to 100), may be more effective at revealing a group x frequency interaction.
Author: Qian Wang
Publisher: Frontiers Media SA
ISBN: 2832509576
Category : Science
Languages : en
Pages : 261
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Book Description
Author: Ruth Y. Litovsky
Publisher: Springer Nature
ISBN: 3030571009
Category : Medical
Languages : en
Pages : 425
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Book Description
The field of Binaural Hearing involves studies of auditory perception, physiology, and modeling, including normal and abnormal aspects of the system. Binaural processes involved in both sound localization and speech unmasking have gained a broader interest and have received growing attention in the published literature. The field has undergone some significant changes. There is now a much richer understanding of the many aspects that comprising binaural processing, its role in development, and in success and limitations of hearing-aid and cochlear-implant users. The goal of this volume is to provide an up-to-date reference on the developments and novel ideas in the field of binaural hearing. The primary readership for the volume is expected to be academic specialists in the diverse fields that connect with psychoacoustics, neuroscience, engineering, psychology, audiology, and cochlear implants. This volume will serve as an important resource by way of introduction to the field, in particular for graduate students, postdoctoral scholars, the faculty who train them and clinicians.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Difficulty understanding speech in the presence of noise is a common complaint of middle-aged and older adults with and without hearing loss. There is an incomplete picture of what contributes to difficulties understanding speech-in-noise in adults who have normal audiograms. As humans we listen binaurally, so declines in binaural processing may contribute to speech-in-noise difficulties. We examined the effects of age on the upper frequency limit of interaural phase difference (IPD) detection and IPD detection at fixed frequencies. We also examined a speech-in-noise measure of spatial separation across young and middle-aged, normal-hearing individuals. Participants were young (n=12) and middle-aged (n=8) adults with normal and symmetrical hearing from 250-8000 Hz. Two interaural phase difference tasks were undertaken. The first assessed interaural phase difference discrimination across frequencies and the second assessed interaural phase difference discrimination at fixed frequencies (500, 750, 1000, 1125 Hz). In addition, the speech-in-noise measure of benefit from spatial separation was assessed by having subjects complete the words-in-noise test with speech and noise at 0° and again with speech at 0° and noise at 90°. The young group had significantly higher (better) upper frequency limits for interaural phase difference discrimination. There was no statistically significant difference between the IPD discrimination at fixed frequencies for the young and middle-aged group, contrary to what was hypothesized. The young group also did not have a greater benefit from spatial separation compared to the middle-aged group. The outcomes from this study add to a growing body of literature suggesting a decline in the upper frequency limit of IPD discrimination with advancing age. This negative effect of aging begins in middle-aged, normal-hearing listeners. The results from this study also suggest that factors other than age and IPD discrimination affect spatial processing in middle-aged adults with clinically normal audiograms. Knowing what contributes to difficulty understanding speech-in-noise will aid in counseling patients and will improve approaches to aural rehabilitation.
Author: Yuan He (Researcher on speech and hearing sciences)
Publisher:
ISBN:
Category : Auditory perception
Languages : en
Pages : 208
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Book Description
Speech understanding difficulties are a common problem for older adults. Past research has indicated that underlying mechanisms could vary from damage to the ear, deficits in the neural auditory pathways in the brain, a general cognitive deficit, or a mixture of any of these three possibilities. While all mechanisms are thought to be present in the older population, neither the contributions of neural versus cognitive deficits nor the time-course of these declines is well established. One critical factor in understanding speech in noise is the ability to segregate a target stream from distractors (e.g., segregating speech from noise) and to group sounds together based on coherent acoustic cues (e.g., identifying different talkers). These abilities rely on a good representation of sound by the ear and the accurate neural encoding of auditory signals. In addition, cognitive skills to regulate these abilities are likely involved. Although these abilities have been demonstrated to be important for speech understanding, they have not been extensively studied in middle-aged or older listeners. This study investigated age-related changes relating to perceptual grouping and segregation, specifically focusing on determining whether age-related changes in the ability to use amplitude modulation and interaural time difference cues in grouping and segregation tasks occur in middle-aged and older adults. In two experiments, modulation detection interference and binaural interference were examined in young, middle-aged, and older adults whose hearing thresholds were within the normal limits. The results suggest a significant age effect in the modulation detection interference but not in the binaural interference. The individual differences in binaural interference were found to be more attributable to hearing sensitivity in the low-frequency region than to age. This study contributes to the understanding of age effects in auditory grouping and segregation, key abilities for speech understanding.
