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https://www.readbyqxmd.com/read/28441300/speech-detection-in-noise-for-young-bilaterally-implanted-children-is-there-evidence-of-binaural-benefit-over-the-shadowed-ear-alone
#1
Karyn L Galvin, Richard C Dowell, Richard J van Hoesel, Mansze Mok
OBJECTIVES: To measure binaural benefit over the shadowed ear alone for young bilateral cochlear implant (CI) users. It was hypothesized that children who received bilateral CIs at a young age (<4 years), and had significant bilateral experience, would demonstrate lower detection thresholds for speech sounds in background noise in the bilateral CI over the unilateral CI condition when the added CI was ipsilateral to the noise source. DESIGN: Children receiving bilateral CIs at the Eye and Ear Hospital Clinic in Melbourne were invited to participate in a wider research project evaluating outcomes; those participating in the wider project who were bilaterally implanted by 4 years and were approximately 2 years postoperative were included in the present study...
April 22, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28429126/assessing-the-role-of-place-and-timing-cues-in-coding-frequency-and-amplitude-modulation-as-a-function-of-age
#2
Kelly L Whiteford, Heather A Kreft, Andrew J Oxenham
Natural sounds can be characterized by their fluctuations in amplitude and frequency. Ageing may affect sensitivity to some forms of fluctuations more than others. The present study used individual differences across a wide age range (20-79 years) to test the hypothesis that slow-rate, low-carrier frequency modulation (FM) is coded by phase-locked auditory-nerve responses to temporal fine structure (TFS), whereas fast-rate FM is coded via rate-place (tonotopic) cues, based on amplitude modulation (AM) of the temporal envelope after cochlear filtering...
April 20, 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28418327/auditory-and-cognitive-factors-associated-with-speech-in-noise-complaints-following-mild-traumatic-brain-injury
#3
Eric C Hoover, Pamela E Souza, Frederick J Gallun
BACKGROUND: Auditory complaints following mild traumatic brain injury (MTBI) are common, but few studies have addressed the role of auditory temporal processing in speech recognition complaints. PURPOSE: In this study, deficits understanding speech in a background of speech noise following MTBI were evaluated with the goal of comparing the relative contributions of auditory and nonauditory factors. RESEARCH DESIGN: A matched-groups design was used in which a group of listeners with a history of MTBI were compared to a group matched in age and pure-tone thresholds, as well as a control group of young listeners with normal hearing (YNH)...
April 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28418322/binaural-interference-quo-vadis
#4
James Jerger, Shlomo Silman, Carol Silverman, Michele Emmer
The reality of the phenomenon of binaural interference with speech recognition has been debated for two decades. Research has taken one of two avenues; group studies or case reports. In group studies, a sample of the elderly population is tested on speech recognition under three conditions; binaural, monaural right and monaural left. The aim is to determine the percent of the sample in which the expected outcome (binaural score-better-than-either-monaural score) is reversed (i.e., one of the monaural scores is better than the binaural score)...
April 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28413888/implementation-and-evaluation-of-a-danish-test-battery-for-auditory-processing-disorder-in-children
#5
Ellen Raben Pedersen, Berit Dahl-Hansen, Jakob Christensen-Dalsgaard, Christian Brandt
OBJECTIVE: This study presents a Danish test battery for auditory processing disorder (APD). The tests were evaluated as to normative cut-off values (pass-fail criteria) and their test-retest reliability. DESIGN: The battery consists of four behavioural tests: the filtered words (FW) test, the dichotic digits (DD) test, the gap detection (GD) test and the binaural masking level difference (BMLD) test. The tests were evaluated through listening experiments on children with no known history of auditory problems...
April 15, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28413698/simultaneous-bilateral-cochlear-implants-developmental-advances-do-not-yet-achieve-normal-cortical-processing
#6
Vijayalakshmi Easwar, Hiroshi Yamazaki, Michael Deighton, Blake Papsin, Karen Gordon
BACKGROUND: Simultaneous bilateral cochlear implantation promotes symmetric development of bilateral auditory pathways but binaural hearing remains abnormal. To evaluate whether bilateral cortical processing remains impaired in such children, cortical activity to unilateral and bilateral stimuli was assessed in a unique cohort of 16 children who received bilateral cochlear implants (CIs) simultaneously at 1.97 ± 0.86 years of age and had ~4 years of CI experience, providing the first opportunity to assess electrically driven cortical development in the absence of reorganized asymmetries from sequential implantation...
April 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28409319/the-effect-of-gamma-enhancing-binaural-beats-on-the-control-of-feature-bindings
#7
Lorenza S Colzato, Laura Steenbergen, Roberta Sellaro
Binaural beats represent the auditory experience of an oscillating sound that occurs when two sounds with neighboring frequencies are presented to one's left and right ear separately. Binaural beats have been shown to impact information processing via their putative role in increasing neural synchronization. Recent studies of feature-repetition effects demonstrated interactions between perceptual features and action-related features: repeating only some, but not all features of a perception-action episode hinders performance...
April 13, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28395561/acoustic-and-perceptual-effects-of-magnifying-interaural-difference-cues-in-a-simulated-binaural-hearing-aid
#8
Tobias de Taillez, Giso Grimm, Birger Kollmeier, Tobias Neher
OBJECTIVE: To investigate the influence of an algorithm designed to enhance or magnify interaural difference cues on speech signals in noisy, spatially complex conditions using both technical and perceptual measurements. To also investigate the combination of interaural magnification (IM), monaural microphone directionality (DIR), and binaural coherence-based noise reduction (BC). DESIGN: Speech-in-noise stimuli were generated using virtual acoustics. A computational model of binaural hearing was used to analyse the spatial effects of IM...
April 10, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28394906/exploring-binaural-hearing-in-gerbils-meriones-unguiculatus-using-virtual-headphones
#9
Sandra Tolnai, Rainer Beutelmann, Georg M Klump
The Mongolian gerbil (Meriones unguiculatus) has become a key species in investigations of the neural processing of sound localization cues in mammals. While its sound localization has been tested extensively under free-field stimulation, many neurophysiological studies use headphones to present signals with binaural localization cues. The gerbil's behavioral sensitivity to binaural cues, however, is unknown for the lack of appropriate stimulation paradigms in awake behaving gerbils. We close this gap in knowledge by mimicking a headphone stimulation; we use free-field loudspeakers and apply cross-talk cancellation techniques to present pure tones with binaural cues via "virtual headphones" to gerbils trained in a sound localization task...
2017: PloS One
https://www.readbyqxmd.com/read/28381487/neural-coding-of-time-varying-interaural-time-differences-and-time-varying-amplitude-in-the-inferior-colliculus
#10
Nathaniel Zuk, Bertrand Delgutte
Binaural cues occurring in natural environments are frequently time varying, either from the motion of a sound source, or through interactions between the cues produced by multiple sources. Yet a broad understanding of how the auditory system processes dynamic binaural cues is still lacking. Here, we directly compared neural responses in the inferior colliculus (IC) of unanesthetized rabbits to broadband noise with time-varying interaural time differences (ITD) with responses to noise with sinusoidal amplitude modulation (SAM) over a wide range of modulation frequencies...
April 5, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28377706/cortical-measures-of-binaural-processing-predict-spatial-release-from-masking-performance
#11
Melissa A Papesh, Robert L Folmer, Frederick J Gallun
Binaural sensitivity is an important contributor to the ability to understand speech in adverse acoustical environments such as restaurants and other social gatherings. The ability to accurately report on binaural percepts is not commonly measured, however, as extensive training is required before reliable measures can be obtained. Here, we investigated the use of auditory evoked potentials (AEPs) as a rapid physiological indicator of detection of interaural phase differences (IPDs) by assessing cortical responses to 180° IPDs embedded in amplitude-modulated carrier tones...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28375876/cochlear-implantation-in-cases-of-unilateral-hearing-loss-initial-localization-abilities
#12
Margaret T Dillon, Emily Buss, Meredith L Anderson, English R King, Ellen J Deres, Craig A Buchman, Kevin D Brown, Harold C Pillsbury
OBJECTIVES: The present study evaluated early auditory localization abilities of cochlear implant (CI) recipients with normal or near-normal hearing (NH) in the contralateral ear. The goal of the study was to better understand the effect of CI listening experience on localization in this population. DESIGN: Twenty participants with unilateral hearing loss enrolled in a prospective clinical trial assessing outcomes of cochlear implantation (ClinicalTrials.gov Identifier: NCT02203305)...
April 3, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28372135/spatial-release-from-masking-based-on-binaural-processing-for-up-to-six-maskers
#13
William A Yost
Spatial Release from Masking (SRM) was measured for identification of a female target word spoken in the presence of male masker words. Target words from a single loudspeaker located at midline were presented when two, four, or six masker words were presented either from the same source as the target or from spatially separated masker sources. All masker words were presented from loudspeakers located symmetrically around the centered target source in the front azimuth hemifield. Three masking conditions were employed: speech-in-speech masking (involving both informational and energetic masking), speech-in-noise masking (involving energetic masking), and filtered speech-in-filtered speech masking (involving informational masking)...
March 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28372109/influence-of-head-tracking-on-the-externalization-of-speech-stimuli-for-non-individualized-binaural-synthesis
#14
Etienne Hendrickx, Peter Stitt, Jean-Christophe Messonnier, Jean-Marc Lyzwa, Brian Fg Katz, Catherine de Boishéraud
Binaural reproduction aims at recreating a realistic audio scene at the ears of the listener using headphones. In the real acoustic world, sound sources tend to be externalized (that is, perceived to be emanating from a source out in the world) rather than internalized (that is, perceived to be emanating from inside the head). Unfortunately, several studies report a collapse of externalization, especially with frontal and rear virtual sources, when listening to binaural content using non-individualized Head-Related Transfer Functions (HRTFs)...
March 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28372072/differences-in-the-temporal-course-of-interaural-time-difference-sensitivity-between-acoustic-and-electric-hearing-in-amplitude-modulated-stimuli
#15
Hongmei Hu, Stephan D Ewert, David McAlpine, Mathias Dietz
Previous studies have shown that normal-hearing (NH) listeners' spatial perception of non-stationary interaural time differences (ITDs) is dominated by the carrier ITD during rising amplitude segments. Here, ITD sensitivity throughout the amplitude-modulation cycle in NH listeners and bilateral cochlear implant (CI) subjects is compared, the latter by means of direct stimulation of a single electrode pair. The data indicate that, while NH listeners are most sensitive to ITDs applied toward the beginning of a modulation cycle at 600 Hz, NH listeners at 200 Hz and especially bilateral CI subjects at 200 pulses per second (pps) are more sensitive to ITDs applied to the modulation maximum...
March 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28372056/binaural-pitch-fusion-comparison-of-normal-hearing-and-hearing-impaired-listeners
#16
Lina A J Reiss, Corey S Shayman, Emily P Walker, Keri O Bennett, Jennifer R Fowler, Curtis L Hartling, Bess Glickman, Michael R Lasarev, Yonghee Oh
Binaural pitch fusion is the fusion of dichotically presented tones that evoke different pitches between the ears. In normal-hearing (NH) listeners, the frequency range over which binaural pitch fusion occurs is usually <0.2 octaves. Recently, broad fusion ranges of 1-4 octaves were demonstrated in bimodal cochlear implant users. In the current study, it was hypothesized that hearing aid (HA) users would also exhibit broad fusion. Fusion ranges were measured in both NH and hearing-impaired (HI) listeners with hearing losses ranging from mild-moderate to severe-profound, and relationships of fusion range with demographic factors and with diplacusis were examined...
March 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28358747/binaural-interaction-effects-of-30-50-hz-auditory-steady-state-responses
#17
Robin Gransier, Astrid van Wieringen, Jan Wouters
OBJECTIVES: Auditory stimuli modulated by modulation frequencies within the 30 to 50 Hz region evoke auditory steady state responses (ASSRs) with high signal to noise ratios in adults, and can be used to determine the frequency-specific hearing thresholds of adults who are unable to give behavioral feedback reliably. To measure ASSRs as efficiently as possible a multiple stimulus paradigm can be used, stimulating both ears simultaneously. The response strength of 30 to 50Hz ASSRs is, however, affected when both ears are stimulated simultaneously...
March 29, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28353521/consequences-of-early-conductive-hearing-loss-on-long-term-binaural-processing
#18
Kelley Graydon, Gary Rance, Richard Dowell, Bram Van Dun
OBJECTIVES: The aim of the study was to investigate the long-term effects of early conductive hearing loss on binaural processing in school-age children. DESIGN: One hundred and eighteen children participated in the study, 82 children with a documented history of conductive hearing loss associated with otitis media and 36 controls who had documented histories showing no evidence of otitis media or conductive hearing loss. All children were demonstrated to have normal-hearing acuity and middle ear function at the time of assessment...
March 28, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28346034/evidence-of-binaural-integration-benefits-following-aria-training-for-children-and-adolescents-diagnosed-with-amblyaudia
#19
Deborah Moncrieff, William Keith, Maria Abramson, Alicia Swann
OBJECTIVE: The purpose of this study was to demonstrate the efficacy of Auditory Rehabilitation for Interaural Asymmetry (ARIA) to improve dichotic listening scores in children and adolescents diagnosed with amblyaudia and other binaural integration deficits. DESIGN: The study is a field experiment without randomisation. STUDY: Participants placed into groups based on dichotic listening test scores received four sessions of ARIA training. Baseline scores were compared to performance during the final session of training and to scores obtained 2 or more months after completion of ARIA...
March 27, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28325532/effectiveness-of-binaural-beats-in-reducing-preoperative-dental-anxiety
#20
B K Isik, A Esen, B Büyükerkmen, A Kilinç, D Menziletoglu
Binaural beats are an auditory illusion perceived when two different pure-tone sine waves are presented one to each ear at a steady intensity and frequency. We evaluated their effectiveness in reducing preoperative anxiety in dentistry. Sixty patients (30 in each group) who were to have impacted third molars removed were studied (experimental group: 20 women and 10 men, mean (range) age 24 (18-35) years, and control group: 22 women and 8 men, mean (range) age 28 (15-47) years). All patients were fully informed about the operation preoperatively, and their anxiety recorded on a visual analogue scale (VAS)...
March 18, 2017: British Journal of Oral & Maxillofacial Surgery
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