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https://www.readbyqxmd.com/read/28079678/sound-localization-in-patients-with-congential-unilateral-conductive-hearing-loss-with-a-transcutaneous-bone-conduction-implant
#1
Erich Vyskocil, Rudolfs Liepins, Alexandra Kaider, Michaela Blineder, Sasan Hamzavi
OBJECTIVE: There is no consensus regarding the benefit of implantable hearing aids in congenital unilateral conductive hearing loss (UCHL). This study aimed to measure sound source localization performance in patients with congenital UCHL and contralateral normal hearing who received a new bone conduction implant. STUDY DESIGN: Evaluation of within-subject performance differences for sound source localization in a horizontal plane. SETTING: Tertiary referral center...
January 10, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28054908/binaural-interference-and-the-effects-of-age-and-hearing-loss
#2
Bruna S S Mussoi, Ruth A Bentler
BACKGROUND: The existence of binaural interference, defined here as poorer speech recognition with both ears than with the better ear alone, is well documented. Studies have suggested that its prevalence may be higher in the elderly population. However, no study to date has explored binaural interference in groups of younger and older adults in conditions that favor binaural processing (i.e., in spatially separated noise). Also, the effects of hearing loss have not been studied. PURPOSE: To examine binaural interference through speech perception tests, in groups of younger adults with normal hearing, older adults with normal hearing for their age, and older adults with hearing loss...
January 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28050211/auditory-processing-assessment-in-children-with-attention-deficit-hyperactivity-disorder-an-open-study-examining-methylphenidate-effects
#3
Bianca Pinheiro Lanzetta-Valdo, Giselle Alves de Oliveira, Jane Tagarro Correa Ferreira, Ester Miyuki Nakamura Palacios
Introduction Children with Attention Deficit Hyperactivity Disorder can present Auditory Processing (AP) Disorder. Objective The study examined the AP in ADHD children compared with non-ADHD children, and before and after 3 and 6 months of methylphenidate (MPH) treatment in ADHD children. Methods Drug-naive children diagnosed with ADHD combined subtype aging between 7 and 11 years, coming from public and private outpatient service or public and private school, and age-gender-matched non-ADHD children, participated in an open, non-randomized study from February 2013 to December 2013...
January 2017: International Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/28044024/an-auditory-illusion-reveals-the-role-of-streaming-in-the-temporal-misallocation-of-perceptual-objects
#4
Anahita H Mehta, Nori Jacoby, Ifat Yasin, Andrew J Oxenham, Shihab A Shamma
This study investigates the neural correlates and processes underlying the ambiguous percept produced by a stimulus similar to Deutsch's 'octave illusion', in which each ear is presented with a sequence of alternating pure tones of low and high frequencies. The same sequence is presented to each ear, but in opposite phase, such that the left and right ears receive a high-low-high … and a low-high-low … pattern, respectively. Listeners generally report hearing the illusion of an alternating pattern of low and high tones, with all the low tones lateralized to one side and all the high tones lateralized to the other side...
February 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28040011/perceptive-and-objective-evaluation-of-calibrated-room-acoustic-simulation-auralizations
#5
Barteld N J Postma, Brian F G Katz
Recently, auralizations have become more prevalent in architectural acoustics and virtual reality. However, there have been few studies examining the perceptual quality achievable by room acoustic simulations and auralizations. Such studies have highlighted potential problems in creating perceptually equivalent simulations when compared to measured auralizations in terms of parameter estimation. In order to accomplish realistic auralizations, calibration of the geometrical acoustics model can be considered a necessary step...
December 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28032116/synaptic-inhibition-in-avian-interaural-level-difference-sound-localizing-neurons
#6
Rebecca J Curry, Yong Lu
Synaptic inhibition plays a fundamental role in the neural computation of the interaural level difference (ILD), an important cue for the localization of high-frequency sound. Here, we studied the inhibitory synaptic currents in the chicken posterior portion of the dorsal nucleus of the lateral lemniscus (LLDp), the first binaural level difference encoder of the avian auditory pathway. Using whole-cell recordings in brain slices, we provide the first evidence confirming a monosynaptic inhibition driven by direct electrical and chemical stimulation of the contralateral LLDp, establishing the reciprocal inhibitory connection between the two LLDps, a long-standing assumption in the field...
November 2016: ENeuro
https://www.readbyqxmd.com/read/28024462/predicting-the-perceptual-consequences-of-hidden-hearing-loss
#7
Andrew J Oxenham
Recent physiological studies in several rodent species have revealed that permanent damage can occur to the auditory system after exposure to a noise that produces only a temporary shift in absolute thresholds. The damage has been found to occur in the synapses between the cochlea's inner hair cells and the auditory nerve, effectively severing part of the connection between the ear and the brain. This synaptopathy has been termed hidden hearing loss because its effects are not thought to be revealed in standard clinical, behavioral, or physiological measures of absolute threshold...
January 2016: Trends in Hearing
https://www.readbyqxmd.com/read/28012324/image-guided-implantation-of-the-bonebridge%C3%A2-with-a-surgical-navigation-a-feasibility-study
#8
Tae Hoon Kong, Yoon Ah Park, Young Joon Seo
OBJECTIVE: To access a method of fitting a designated location on the patient's temporal bone by surgically navigating to the Bonebridge implantation. STUDY DESIGN: A patient with unilateral profound hearing loss received early intervention with the Bonebridge implant for binaural hearing. The optimal implant site was determined from computed tomography (CT) images using a three-dimensional (3D) simulation software program before the surgery. The pre-calculated coordinates from the 3D simulation software program were moved to the Scopis Hybrid Navigation System...
November 30, 2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28002083/the-effect-of-interaural-mismatches-on-contralateral-unmasking-with-single-sided-vocoders
#9
Jessica M Wess, Douglas S Brungart, Joshua G W Bernstein
OBJECTIVES: Cochlear-implant (CI) users with single-sided deafness (SSD)-that is, one normal-hearing (NH) ear and one CI ear-can obtain some unmasking benefits when a mixture of target and masking voices is presented to the NH ear and a copy of just the masking voices is presented to the CI ear. NH listeners show similar benefits in a simulation of SSD-CI listening, whereby a mixture of target and masking voices is presented to one ear and a vocoded copy of the masking voices is presented to the opposite ear...
December 19, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/28000259/demonstrating-test-retest-reliability-of-electrophysiological-measures-for-healthy-adults-in-a-multisite-study-of-biomarkers-of-antidepressant-treatment-response
#10
Craig E Tenke, Jürgen Kayser, Pia Pechtel, Christian A Webb, Daniel G Dillon, Franziska Goer, Laura Murray, Patricia Deldin, Benji T Kurian, Patrick J McGrath, Ramin Parsey, Madhukar Trivedi, Maurizio Fava, Myrna M Weissman, Melvin McInnis, Karen Abraham, Jorge E Alvarenga, Daniel M Alschuler, Crystal Cooper, Diego A Pizzagalli, Gerard E Bruder
Growing evidence suggests that loudness dependency of auditory evoked potentials (LDAEP) and resting EEG alpha and theta may be biological markers for predicting response to antidepressants. In spite of this promise, little is known about the joint reliability of these markers, and thus their clinical applicability. New standardized procedures were developed to improve the compatibility of data acquired with different EEG platforms, and used to examine test-retest reliability for the three electrophysiological measures selected for a multisite project-Establishing Moderators and Biosignatures of Antidepressant Response for Clinical Care (EMBARC)...
January 2017: Psychophysiology
https://www.readbyqxmd.com/read/27997696/the-organization-of-frequency-and-binaural-cues-in-the-gerbil-inferior-colliculus
#11
Gilberto David Graña, Kendall A Hutson, Alexandra Badea, Andrew Pappa, William Scott, Douglas C Fitzpatrick
The inferior colliculus (IC) is the common target of separate pathways that transmit different types of auditory information. Beyond tonotopy, little is known about the organization of response properties within the 3-dimensional layout of the auditory midbrain in most species. A case where the functional properties of neurons can be readily characterized and related to specific pathways is ITD processing. To characterize the representation of ITDs relative to the frequency and hodological organization of the IC, the properties of neurons were recorded and the sites recovered histologically...
December 20, 2016: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/27997667/intelligibility-and-clarity-of-reverberant-speech-effects-of-wide-dynamic-range-compression-release-time-and-working-memory
#12
Paul N Reinhart, Pamela E Souza
Purpose: The purpose of this study was to examine the effects of varying wide dynamic range compression (WDRC) release time on intelligibility and clarity of reverberant speech. The study also considered the role of individual working memory. Method: Thirty older listeners with mild to moderately-severe sloping sensorineural hearing loss participated. Individuals were divided into high and low working memory groups on the basis of the results of a reading span test...
December 1, 2016: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/27995277/-cochlear-implant-treatment-of-patients-with-single-sided-deafness-or-asymmetric-hearing-loss-german-version
#13
S Arndt, R Laszig, A Aschendorff, F Hassepass, R Beck, T Wesarg
BACKGROUND: The rehabilitation of patients with single-sided deafness (SSD) or asymmetric hearing loss can be achieved with conventional (bilateral) contralateral routing of signals ((Bi)CROS) hearing aids ((Bi)CROS-HA, (Bi)CROS), bone-anchored hearing systems (BAHS) or cochlear implants (CI). To date, only small case series have been published on treatment outcomes in SSD patients after CI surgery and there are only a few comparative studies evaluating rehabilitation outcomes. OBJECTIVE: The aim of this study was to provide evidence of successful treatment of SSD and asymmetric hearing loss with a CI compared to the untreated monaural hearing condition and the BAHS and (Bi)CROS treatment options in a large number of patients...
December 19, 2016: HNO
https://www.readbyqxmd.com/read/27987375/stimulus-specific-adaptation-to-visual-but-not-auditory-motion-direction-in-the-barn-owl-s-optic-tectum
#14
Dante F Wasmuht, Jose L Pena, Yoram Gutfreund
Whether the auditory and visual systems use a similar coding strategy to represent motion direction is an open question. We investigated this question in the barn owl's optic tectum (OT) testing stimulus specific adaptation (SSA) to the direction of motion. SSA, the reduction of the response to a repetitive stimulus that does not generalize to other stimuli, has been well established in OT neurons. SSA suggests a separate representation of the adapted stimulus in upstream pathways. So far, only SSA to static stimuli has been studied in the OT...
December 17, 2016: European Journal of Neuroscience
https://www.readbyqxmd.com/read/27978586/-20-years-of-bilateral-cochlear-implantation-an-analysis-of-the-implanted-patients
#15
A Radeloff, M Neckel, W Shehata-Dieler, K Rak, S P Schraven, W Großmann, R Hagen
Binaural hearing is essential for localization abilities and improves the speech perception in noise. Since 20 years, bilateral cochlear implantation is routinely performed to restore binaural hearing. In this cross-sectional study, we evaluated speech perception in quiet (Freiburger monosyllables, Hochmair-Schulz-Moser (HSM) sentence test, each at 70 dB) and in noise (HSM test, signal-to-noise ratio 10 dB) in 103 out of 165 adult patients who were bilaterally implanted in Würzburg between 1995 and June 2014...
December 15, 2016: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/27951738/functionality-of-hearing-aids-state-of-the-art-and-future-model-based-solutions
#16
Birger Kollmeier, Jürgen Kiessling
A review about technical and perceptual factors in hearing aid technology, research and development is provided, covering current commercial solutions, underlying models of hearing loss for usage in hearing devices and emerging future technical solutions for hearing aid functionalities. A chain of techniques has provided incremental, but steady increases in user benefit, e.g. in the fields of hearing aid amplification, feedback suppression, dynamic compression, noise reduction and situation adaptation. The models describing the perceptual consequences of sensorineural hearing impairment describe the effects on the acoustical level, the neurosensory level and the cognitive level and provide the framework for compensatory (or even substitutional) functions of hearing aids in terms of the attenuation component, the distortion component and the neural component of the hearing loss...
December 13, 2016: International Journal of Audiology
https://www.readbyqxmd.com/read/27914424/a-metric-for-predicting-binaural-speech-intelligibility-in-stationary-noise-and-competing-speech-maskers
#17
Yan Tang, Martin Cooke, Bruno M Fazenda, Trevor J Cox
One criterion in the design of binaural sound scenes in audio production is the extent to which the intended speech message is correctly understood. Object-based audio broadcasting systems have permitted sound editors to gain more access to the metadata (e.g., intensity and location) of each sound source, providing better control over speech intelligibility. The current study describes and evaluates a binaural distortion-weighted glimpse proportion metric-BiDWGP-which is motivated by better-ear glimpsing and binaural masking level differences...
September 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27914414/spatial-attention-in-bilateral-cochlear-implant-users
#18
Matthew J Goupell, Alan Kan, Ruth Y Litovsky
Cochlear-implant (CI) users have difficulty understanding speech in the presence of interfering sounds. This study was designed to determine if binaural unmasking of speech is limited by peripheral or central encoding. Speech was presented to bilateral CI listeners using their clinical processors; unprocessed or vocoded speech was presented to normal-hearing (NH) listeners. Performance was worst for all listener groups in conditions where both the target and interferer were presented monaurally or diotically (i...
September 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27914394/relating-interaural-difference-sensitivities-for-several-parameters-measured-in-normal-hearing-and-hearing-impaired-listeners
#19
Nathaniel J Spencer, Monica L Hawley, H Steven Colburn
Just-noticeable differences (JNDs) in interaural time delay (ITD), interaural level difference (ILD), and interaural cross-correlation (ICC) were measured with low- and high-frequency noise bands over multiple sessions for 10 normal-hearing (NH) and 11 hearing-impaired (HI) listeners. Individual subject thresholds tended to improve with training then stabilize. Measured JNDs varied over these experienced listeners, for both subject groups and all tasks. Group JNDs were seldom predictable from hearing level...
September 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908080/behavioral-manifestations-of-audiometrically-defined-slight-or-hidden-hearing-loss-revealed-by-measures-of-binaural-detection
#20
Leslie R Bernstein, Constantine Trahiotis
This study assessed whether audiometrically-defined "slight" or "hidden" hearing losses might be associated with degradations in binaural processing as measured in binaural detection experiments employing interaurally delayed signals and maskers. Thirty-one listeners participated, all having no greater than slight hearing losses (i.e., no thresholds greater than 25 dB HL). Across the 31 listeners and consistent with the findings of Bernstein and Trahiotis [(2015). J. Acoust. Soc. Am. 138, EL474-EL479] binaural detection thresholds at 500 Hz and 4 kHz increased with increasing magnitude of interaural delay, suggesting a loss of precision of coding with magnitude of interaural delay...
November 2016: Journal of the Acoustical Society of America
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