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https://www.readbyqxmd.com/read/29135863/effectiveness-in-rehabilitation-of-current-wireless-cros-technology-in-experienced-bone-anchored-implant-users
#1
Hillary A Snapp, Michael E Hoffer, Xuezhong Liu, Suhrud M Rajguru
OBJECTIVE: To compare the effectiveness of current contralateral routing of signal technology (CROS) to bone-anchored implants in experienced bone-anchored implant users with unilateral severe-profound sensorineural hearing loss. DESIGN: Prospective, within-subject repeated-measures comparison study. SETTING: Tertiary referral center. PATIENTS: Adult, English-speaking patients (n = 12) with severe-profound unilateral sensorineural hearing loss implanted with a bone-anchored implant for the indication of single-sided deafness...
December 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29134751/cortical-hemispheric-asymmetries-are-present-at-young-ages-and-further-develop-into-adolescence
#2
Hiroshi Yamazaki, Vijayalakshmi Easwar, Melissa Jane Polonenko, Salima Jiwani, Daniel D E Wong, Blake Croll Papsin, Karen Ann Gordon
Specialization of the auditory cortices for pure tone listening may develop with age. In adults, the right hemisphere dominates when listening to pure tones and music; we thus hypothesized that (a) asymmetric function between auditory cortices increases with age and (b) this development is specific to tonal rather than broadband/non-tonal stimuli. Cortical responses to tone-bursts and broadband click-trains were recorded by multichannel electroencephalography in young children (5.1 ± 0.8 years old) and adolescents (15...
November 13, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29128159/development-of-the-head-pinnae-and-acoustical-cues-to-sound-location-in-a-precocial-species-the-guinea-pig-cavia-porcellus
#3
Kelsey L Anbuhl, Victor Benichoux, Nathaniel T Greene, Andrew D Brown, Daniel J Tollin
The morphology of the head and pinna shape the spatial and frequency dependence of sound propagation that give rise to the acoustic cues to sound source location. During early development, the physical dimensions of the head and pinna increase rapidly. Thus, the binaural (interaural time and level differences, ITD and ILD) and monaural (spectral shape) cues are also hypothesized to change rapidly. Complex interactions between the size and shape of the head and pinna limit the accuracy of simple acoustical models (e...
November 1, 2017: Hearing Research
https://www.readbyqxmd.com/read/29106867/audio-visual-speech-perception-in-prelingually-deafened-japanese-children-following-sequential-bilateral-cochlear-implantation
#4
Ryosuke Yamamoto, Yasushi Naito, Risa Tona, Saburo Moroto, Rinko Tamaya, Keizo Fujiwara, Shogo Shinohara, Shinji Takebayashi, Masahiro Kikuchi, Tetsuhiko Michida
OBJECTIVES: An effect of audio-visual (AV) integration is observed when the auditory and visual stimuli are incongruent (the McGurk effect). In general, AV integration is helpful especially in subjects wearing hearing aids or cochlear implants (CIs). However, the influence of AV integration on spoken word recognition in individuals with bilateral CIs (Bi-CIs) has not been fully investigated so far. In this study, we investigated AV integration in children with Bi-CIs. METHODS: The study sample included thirty one prelingually deafened children who underwent sequential bilateral cochlear implantation...
November 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29071383/involvement-of-ordinary-what-and-where-auditory-cortical-areas-during-illusory-perception
#5
Alfredo Brancucci, Caterina Padulo, Raffaella Franciotti, Luca Tommasi, Stefania Della Penna
The focus of the present study is on the relationships between illusory and non-illusory auditory perception analyzed at a biological level. To this aim, we investigate neural mechanisms underlying the Deutsch's illusion, a condition in which both sound identity ("what") and origin ("where") are deceptively perceived. We recorded magnetoencephalogram from healthy subjects in three conditions: (a) listening to the acoustic sequence eliciting the illusion (ILL), (b) listening to a monaural acoustic sequence mimicking the illusory percept (MON), and (c) listening to an acoustic sequence similar to (a) but not eliciting the illusion (NIL)...
October 25, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/29059695/-auditory-processing-disorder-is-the-diagnosis-already-possible-in-first-graders
#6
Christiane Kiese-Himmel, Andreas Nickisch, Franziska Werner
Objective Significant differences in performance on an eclectic German test battery for Auditory Processing Disorders (APD) was found in the most diagnostic tools between children with APD and controls in the 2nd, 3rd and 4th school year of primary education. Aim of the present study was to examine whether it is also the case for first graders. Material and Methods The performance in the behavioral test battery (including 14 specific auditory tests) was compared in two subject groups (aged 6-8 yrs): 41 first graders with APD of a clinical database, 37 typically developing first graders without APD (controls)...
October 23, 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/29022419/speech-evoked-auditory-brainstem-response-with-ipsilateral-noise-in-adults-with-unilateral-hearing-loss
#7
Nihal Mohamed Abd El-Ghaffar, Amani Mohamed El-Gharib, Enaas A Kolkaila, Trandil Hassan Elmahallawy
INTRODUCTION: Subjects with unilateral hearing loss (UHL) report difficulties in speech understanding in noise. Speech-evoked auditory brainstem response (S-ABR) provides cues for temporal and spectral encoding of speech in the brainstem. S-ABR recording in noise increases its sensitivity in evaluating the auditory processing and related disorders. OBJECTIVES: Study speech encoding at the level of brainstem when the auditory system relies on one ear and to study the effect of noise on this encoding...
October 12, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28972671/first-impression-bias-effects-on-mismatch-negativity-to-auditory-spatial-deviants
#8
Kaitlin Fitzgerald, Alexander Provost, Juanita Todd
Internal models of regularities in the world serve to facilitate perception as redundant input can be predicted and neural resources conserved for that which is new or unexpected. In the auditory system, this is reflected in an evoked potential component known as mismatch negativity (MMN). MMN is elicited by the violation of an established regularity to signal the inaccuracy of the current model and direct resources to the unexpected event. Prevailing accounts suggest that MMN amplitude will increase with stability in regularity; however, observations of first-impression bias contradict stability effects...
October 3, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28971746/loudness-summation-of-equal-loud-narrowband-signals-in-normal-hearing-and-hearing-impaired-listeners
#9
Stephan D Ewert, Dirk Oetting
OBJECTIVE: Loudness perception of binaural broadband signals, e.g. speech shaped noise, shows large individual differences using frequency-dependent amplification which was adjusted to restore the loudness perception of monaural narrowband signals in hearing-impaired (HI) listeners. To better understand and quantify this highly individual effect, loudness perception of broadband stimuli consisting of a number of spectrally separated narrowband components which where individually adjusted to equal loudness is of interest...
October 3, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28947575/signatures-of-somatic-inhibition-and-dendritic-excitation-in-auditory-brainstem-field-potentials
#10
Joshua H Goldwyn, Myles McLaughlin, Eric Verschooten, Philip X Joris, John Rinzel
Extracellular voltage recordings (Ve ; field potentials) provide an accessible view of in vivo neural activity, but proper interpretation of field potentials is a long-standing challenge. Computational modeling can aid in identifying neural generators of field potentials. In the auditory brainstem of cats, spatial patterns of sound-evoked Ve can resemble, strikingly, Ve generated by current dipoles. Previously, we developed a biophysically-based model of a binaural brainstem nucleus, the medial superior olive (MSO), that accounts qualitatively for observed dipole-like Ve patterns in sustained responses to monaural tones with frequencies >∼1000 Hz (Goldwyn et al...
October 25, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28946625/monaural-sound-localization-based-on-reflective-structure-and-homomorphic-deconvolution
#11
Yeonseok Park, Anthony Choi, Keonwook Kim
The asymmetric structure around the receiver provides a particular time delay for the specific incoming propagation. This paper designs a monaural sound localization system based on the reflective structure around the microphone. The reflective plates are placed to present the direction-wise time delay, which is naturally processed by convolutional operation with a sound source. The received signal is separated for estimating the dominant time delay by using homomorphic deconvolution, which utilizes the real cepstrum and inverse cepstrum sequentially to derive the propagation response's autocorrelation...
September 23, 2017: Sensors
https://www.readbyqxmd.com/read/28912440/the-generalization-of-auditory-accommodation-to-altered-spectral-cues
#12
Christopher J G Watson, Simon Carlile, Heather Kelly, Kapilesh Balachandar
The capacity of healthy adult listeners to accommodate to altered spectral cues to the source locations of broadband sounds has now been well documented. In recent years we have demonstrated that the degree and speed of accommodation are improved by using an integrated sensory-motor training protocol under anechoic conditions. Here we demonstrate that the learning which underpins the localization performance gains during the accommodation process using anechoic broadband training stimuli generalize to environmentally relevant scenarios...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28867348/cellular-computations-underlying-detection-of-gaps-in-sounds-and-lateralizing-sound-sources
#13
REVIEW
Donata Oertel, Xiao-Jie Cao, James R Ison, Paul D Allen
In mammals, acoustic information arises in the cochlea and is transmitted to the ventral cochlear nuclei (VCN). Three groups of VCN neurons extract different features from the firing of auditory nerve fibers and convey that information along separate pathways through the brainstem. Two of these pathways process temporal information: octopus cells detect coincident firing among auditory nerve fibers and transmit signals along monaural pathways, and bushy cells sharpen the encoding of fine structure and feed binaural pathways...
October 2017: Trends in Neurosciences
https://www.readbyqxmd.com/read/28863559/modeling-off-frequency-binaural-masking-for-short-and-long-duration-signals
#14
Marc Nitschmann, Ifat Yasin, G Bruce Henning, Jesko L Verhey
Experimental binaural masking-pattern data are presented together with model simulations for 12- and 600-ms signals. The masker was a diotic 11-Hz wide noise centered on 500 Hz. The tonal signal was presented either diotically or dichotically (180° interaural phase difference) with frequencies ranging from 400 to 600 Hz. The results and the modeling agree with previous data and hypotheses; simulations with a binaural model sensitive to monaural modulation cues show that the effect of duration on off-frequency binaural masking-level differences is mainly a result of modulation cues which are only available in the monaural detection of long signals...
August 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28863555/binaural-pitch-fusion-pitch-averaging-and-dominance-in-hearing-impaired-listeners-with-broad-fusion
#15
Yonghee Oh, Lina A J Reiss
Both bimodal cochlear implant and bilateral hearing aid users can exhibit broad binaural pitch fusion, the fusion of dichotically presented tones over a broad range of pitch differences between ears [Reiss, Ito, Eggleston, and Wozny. (2014). J. Assoc. Res. Otolaryngol. 15(2), 235-248; Reiss, Eggleston, Walker, and Oh. (2016). J. Assoc. Res. Otolaryngol. 17(4), 341-356; Reiss, Shayman, Walker, Bennett, Fowler, Hartling, Glickman, Lasarev, and Oh. (2017). J. Acoust. Soc. Am. 143(3), 1909-1920]. Further, the fused binaural pitch is often a weighted average of the different pitches perceived in the two ears...
August 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28846498/benefits-of-incorporating-the-adaptive-dynamic-range-optimization-amplification-scheme-into-an-assistive-listening-device-for-people-with-mild-or-moderate-hearing-loss
#16
Hung-Yue Chang, Ching-Hsing Luo, Tun-Shin Lo, Hsiao-Chuan Chen, Kuo-You Huang, Wen-Huei Liao, Mao-Chang Su, Shu-Yu Liu, Nan-Mai Wang
This study investigated whether a self-designed assistive listening device (ALD) that incorporates an adaptive dynamic range optimization (ADRO) amplification strategy can surpass a commercially available monaurally worn linear ALD, SM100. Both subjective and objective measurements were implemented. Mandarin Hearing-In-Noise Test (MHINT) scores were the objective measurement, whereas participant satisfaction was the subjective measurement. The comparison was performed in a mixed design (i.e., subjects' hearing status being mild or moderate, quiet versus noisy, and linear versus ADRO scheme)...
August 28, 2017: Assistive Technology: the Official Journal of RESNA
https://www.readbyqxmd.com/read/28829840/tone-perception-in-mandarin-speaking-school-age-children-with-otitis-media-with-effusion
#17
Ting Cai, Bradley McPherson, Caiwei Li, Feng Yang
OBJECTIVES: The present study explored tone perception ability in school age Mandarin-speaking children with otitis media with effusion (OME) in noisy listening environments. The study investigated the interaction effects of noise, tone type, age, and hearing status on monaural tone perception, and assessed the application of a hierarchical clustering algorithm for profiling hearing impairment in children with OME. METHODS: Forty-one children with normal hearing and normal middle ear status and 84 children with OME with or without hearing loss participated in this study...
2017: PloS One
https://www.readbyqxmd.com/read/28806706/auditory-cortex-lesions-impair-contralateral-tone-pattern-detection-under-informational-masking
#18
Lisa Prilop, Alexander Gutschalk
Impaired hearing contralateral to unilateral auditory-cortex lesions is typically only observed under conditions of perceptual competition, such as dichotic presentation or speech in noise. It remains unclear, however, if the source of this effect is direct competition in frequency-specific neurons, or if enhanced processing load in more distant frequencies can also impair auditory detection. To evaluate this question, we studied a group of patients with unilateral auditory-cortex lesions (N = 14, six left-hemispheric (LH), eight right-hemispheric (RH); four females; age range 26-72 years) and a control group (N = 25; 15 females; age range 18-76 years) with a target-detection task in presence of a multi-tone masker, which can produce informational masking...
July 19, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28768324/speech-understanding-in-noise-by-patients-with-cochlear-implants-using-a-monaural-adaptive-beamformer
#19
Michael F Dorman, Sarah Natale, Anthony Spahr, Erin Castioni
Purpose: The aim of this experiment was to compare, for patients with cochlear implants (CIs), the improvement for speech understanding in noise provided by a monaural adaptive beamformer and for two interventions that produced bilateral input (i.e., bilateral CIs and hearing preservation [HP] surgery). Method: Speech understanding scores for sentences were obtained for 10 listeners fit with a single CI. The listeners were tested with and without beamformer activated in a "cocktail party" environment with spatially separated target and maskers...
August 16, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28723600/detailed-analysis-of-high-frequency-auditory-brainstem-response-in-patients-with-tinnitus-a-preliminary-study
#20
Joseph Pinkl, Matthew J Wilson, Danica Billingsly, Raymundo Munguia-Vazquez
Increased spontaneous activity and aberrant neural synchrony is thought to be the underlying cause of tinnitus. The perceived pitch of tinnitus may be dictated by frequency specific neural fibers of the subcortical pathway, or the projection of altered cortical activity by-way-of tonotopic reorganizations. Subcortical neural activity in relation to tinnitus was characterized using ABR measurements. In the present study, 11 patients (21 ears) with constant tonal tinnitus underwent a two-part experiment. Experiment 1 involved click ABR measurements and included two experimental groups: tinnitus with normal hearing from 2000-4000 Hz (GI) and tinnitus with hearing loss within the range of 2000-4000 Hz (GII)...
June 1, 2017: International Tinnitus Journal
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