keyword
MENU ▼
Read by QxMD icon Read
search

Binaural

keyword
https://www.readbyqxmd.com/read/28806338/isolated-second-implant-adaptation-period-in-sequential-cochlear-implantation-in-adults
#1
Kari Smilsky, Peter R Dixon, Leah Smith, David Shipp, Amy Ng, Tara Millman, Suzanne Stewart, Julian M Nedzelski, Vincent Y Lin, Joseph M Chen
OBJECTIVE: To determine if depriving the use of the first cochlear implant (CI1) impacts adaptation to a sequential implant (CI2). STUDY DESIGN: Prospective cohort. SETTING: Academic center. PATIENTS: Sixteen unilateral cochlear implant recipients undergoing contralateral implantation (sequential bilateral) were matched according to age, etiology, duration of deafness, device age, and delay between implants. INTERVENTION: During a 4-week adaptation period after CI2 activation, patients underwent deprivation of CI1 or were permitted continued use of it...
September 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28783570/speech-reception-with-different-bilateral-directional-processing-schemes-influence-of-binaural-hearing-audiometric-asymmetry-and-acoustic-scenario
#2
Tobias Neher, Kirsten C Wagener, Matthias Latzel
Hearing aid (HA) users can differ markedly in their benefit from directional processing (or beamforming) algorithms. The current study therefore investigated candidacy for different bilateral directional processing schemes. Groups of elderly listeners with symmetric (N = 20) or asymmetric (N = 19) hearing thresholds for frequencies below 2 kHz, a large spread in the binaural intelligibility level difference (BILD), and no difference in age, overall degree of hearing loss, or performance on a measure of selective attention took part...
July 29, 2017: Hearing Research
https://www.readbyqxmd.com/read/28768112/the-disparate-histories-of-binocular-vision-and-binaural-hearing
#3
Nicholas J Wade
Vision and hearing are dependent on disparities of spatial patterns received by two eyes and on time and intensity differences to two ears. However, the experiences of a single world have masked attention to these disparities. While eyes and ears are paired, there has not been parity in the attention directed to their functioning. Phenomena involving binocular vision were commented upon since antiquity whereas those about binaural hearing are much more recent. This history is compared with respect to the experimental manipulations of dichoptic and dichotic stimuli and the instruments used to stimulate the paired organs...
August 2, 2017: Journal of the History of the Neurosciences
https://www.readbyqxmd.com/read/28764593/right-ear-precedence-and-vocal-emotion-contagion-the-role-of-the-left-hemisphere
#4
Astrid Schepman, Paul Rodway, Louise Cornmell, Bethany Smith, Sabrina Lauren de Sa, Ciara Borwick, Elisha Belfon-Thompson
Much evidence suggests that the processing of emotions is lateralized to the right hemisphere of the brain. However, under some circumstances the left hemisphere might play a role, particularly for positive emotions and emotional experiences. We explored whether emotion contagion was right-lateralized, lateralized valence-specifically, or potentially left-lateralized. In two experiments, right-handed female listeners rated to what extent emotionally intoned pseudo-sentences evoked target emotions in them. These sound stimuli had a 7 ms ear lead in the left or right channel, leading to stronger stimulation of the contralateral hemisphere...
August 2, 2017: Laterality
https://www.readbyqxmd.com/read/28764482/strength-of-onset-and-ongoing-cues-in-judgments-of-lateral-position
#5
Richard L Freyman, Patrick M Zurek
This study describes the contributions to auditory image position of an interaural time delay (ITD) cue at onset relative to subsequent ITDs during the ongoing part of a stimulus. Test stimuli were trains of 1-ms binaural noise bursts; lateral position was measured with a wideband acoustic pointer that subjects adjusted to match the intracranial position of test stimuli. In different conditions the ongoing part of the stimulus (the bursts following the first one) either had a consistent ITD (the same ITD on each ongoing burst), or had alternating leading and lagging components with ITDs that opposed one another...
July 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28764456/binaural-masking-release-in-symmetric-listening-conditions-with-spectro-temporally-modulated-maskers
#6
Stephan D Ewert, Wiebke Schubotz, Thomas Brand, Birger Kollmeier
Speech reception thresholds (SRTs) decrease as target and maskers are spatially separated (spatial release from masking, SRM). The current study systematically assessed how SRTs and SRM for a frontal target in a spatially symmetric masker configuration depend on spectro-temporal masker properties, the availability of short-time interaural level difference (ILD) and interaural time difference (ITD), and informational masking. Maskers ranged from stationary noise to single, interfering talkers and were modified by head-related transfer functions to provide: (i) different binaural cues (ILD, ITD, or both) and (ii) independent maskers in each ear ("infinite ILD")...
July 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28764424/blind-localization-and-segregation-of-two-sources-including-a-binaural-head-movement-model
#7
Nikhil Deshpande, Jonas Braasch
This study investigates how virtual head rotations can improve a binaural model's ability to segregate speech signals. The model takes two mixed speech sources spatialized to unique azimuth positions and localizes them. The model virtually rotates its head to orient itself for the maximum signal-to-noise ratio for extracting the target. An equalization-cancellation approach is used to generate a binary mask for the target based on localization cues. The mask is then overlaid onto the mixed signal's spectrogram to extract the target from the mixture...
July 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28760859/sound-evoked-activity-influences-myelination-of-brainstem-axons-in-the-trapezoid-body
#8
James L Sinclair, Matthew J Fischl, Olga Alexandrova, Martin Heß, Benedikt Grothe, Christian Leibold, Conny Kopp-Scheinpflug
Plasticity of myelination represents a mechanism to tune the flow of information by balancing functional requirements with metabolic and spatial constraints. The auditory system is heavily myelinated and operates at the upper limits of action potential generation frequency and speed observed in the mammalian CNS. This study aimed to characterize the development of myelin within the trapezoid body, a central auditory fiber tract, and determine the influence sensory experience has on this process in mice of both sexes...
July 31, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28758567/the-benefit-of-a-visually-guided-beamformer-in-a-dynamic-speech-task
#9
Virginia Best, Elin Roverud, Timothy Streeter, Christine R Mason, Gerald Kidd
The aim of this study was to evaluate the performance of a visually guided hearing aid (VGHA) under conditions designed to capture some aspects of "real-world" communication settings. The VGHA uses eye gaze to steer the acoustic look direction of a highly directional beamforming microphone array. Although the VGHA has been shown to enhance speech intelligibility for fixed-location, frontal targets, it is currently not known whether these benefits persist in the face of frequent changes in location of the target talker that are typical of conversational turn-taking...
January 2017: Trends in Hearing
https://www.readbyqxmd.com/read/28752811/bilateral-versus-unilateral-cochlear-implantation-in-adult-listeners-speech-on-speech-masking-and-multitalker-localization
#10
Baljeet Rana, Jörg M Buchholz, Catherine Morgan, Mridula Sharma, Tobias Weller, Shivali Appaiah Konganda, Kyoko Shirai, Atsushi Kawano
Binaural hearing helps normal-hearing listeners localize sound sources and understand speech in noise. However, it is not fully understood how far this is the case for bilateral cochlear implant (CI) users. To determine the potential benefits of bilateral over unilateral CIs, speech comprehension thresholds (SCTs) were measured in seven Japanese bilateral CI recipients using Helen test sentences (translated into Japanese) in a two-talker speech interferer presented from the front (co-located with the target speech), ipsilateral to the first-implanted ear (at +90° or -90°), and spatially symmetric at ±90°...
January 2017: Trends in Hearing
https://www.readbyqxmd.com/read/28750416/electrophysiological-evidence-for-the-sources-of-the-masking-level-difference
#11
Cynthia G Fowler
Purpose: The purpose of this review article is to review evidence from auditory evoked potential studies to describe the contributions of the auditory brainstem and cortex to the generation of the masking level difference (MLD). Method: A literature review was performed, focusing on the auditory brainstem, middle, and late latency responses used in protocols similar to those used to generate the behavioral MLD. Results: Temporal coding of the signals necessary for generating the MLD occurs in the auditory periphery and brainstem...
August 16, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28739482/brain-responses-to-40-hz-binaural-beat-and-effects-on-emotion-and-memory
#12
Nantawachara Jirakittayakorn, Yodchanan Wongsawat
Gamma oscillation plays a role in binding process or sensory integration, a process by which several brain areas beside primary cortex are activated for higher perception of the received stimulus. Beta oscillation is also involved in interpreting received stimulus and occurs following gamma oscillation, and this process is known as gamma-to-beta transition, a process for neglecting unnecessary stimuli in surrounding environment. Gamma oscillation also associates with cognitive functions, memory and emotion...
July 21, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28726592/effect-of-extreme-adaptive-frequency-compression-in-bimodal-listeners-on-sound-localization-and-speech-perception
#13
Lidwien C E Veugen, Josef Chalupper, Lucas H M Mens, Ad F M Snik, A John van Opstal
OBJECTIVES: This study aimed to improve access to high-frequency interaural level differences (ILD), by applying extreme frequency compression (FC) in the hearing aid (HA) of 13 bimodal listeners, using a cochlear implant (CI) and conventional HA in opposite ears. DESIGN: An experimental signal-adaptive frequency-lowering algorithm was tested, compressing frequencies above 160 Hz into the individual audible range of residual hearing, but only for consonants (adaptive FC), thus protecting vowel formants, with the aim to preserve speech perception...
July 20, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/28712816/enhanced-startle-reflexivity-during-presentation-of-visual-nurture-cues-in-young-adults-who-experienced-parental-divorce-in-early-childhood
#14
Xenia Hengesch, Mauro F Larra, Johannes B Finke, Terry D Blumenthal, Hartmut Schächinger
Adverse childhood experiences (ACE) may influence stress and affective processing in adulthood. Animal and human studies show enhanced startle reflexivity in adult participants with ACE. This study examined the impact of one of the most common ACE, parental divorce, on startle reflexivity in adulthood. Affective modulation of acoustically-elicited startle eye blink was assessed in a group of 23 young adults with self-reported history of parental divorce, compared to an age- and sex-matched control group (n=18)...
July 13, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28702821/-bilateral-cochlear-implants
#15
REVIEW
J Müller
Cochlear implants (CI) are standard for the hearing rehabilitation of severe to profound deafness. Nowadays, if bilaterally indicated, bilateral implantation is usually recommended (in accordance with German guidelines). Bilateral implantation enables better speech discrimination in quiet and in noise, and restores directional and spatial hearing. Children with bilateral CI are able to undergo hearing-based hearing and speech development. Within the scope of their individual possibilities, bilaterally implanted children develop faster than children with unilateral CI and attain, e...
July 2017: HNO
https://www.readbyqxmd.com/read/28701912/brain-responses-to-a-6-hz-binaural-beat-effects-on-general-theta-rhythm-and-frontal-midline-theta-activity
#16
Nantawachara Jirakittayakorn, Yodchanan Wongsawat
A binaural beat is a beat phenomenon that is generated by the dichotic presentation of two almost equivalent pure tones but with slightly different frequencies. The brain responses to binaural beats remain controversial; therefore, the aim of this study was to investigate theta activity responses to a binaural beat by controlling factors affecting localization, including beat frequency, carrier tone frequency, exposure duration, and recording procedure. Exposure to a 6-Hz binaural beat on a 250 Hz carrier tone for 30 min was utilized in this study...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28701535/enhancement-of-phase-locking-in-rodents-i-an-axonal-recording-study-in-gerbil
#17
Liting Wei, Shotaro Karino, Eric Verschooten, Philip X Joris
The trapezoid body (TB) contains axons of neurons in the anteroventral cochlear nucleus (AVCN) projecting to monaural and binaural nuclei in the superior olivary complex (SOC). Characterization of these monaural inputs is important for the interpretation of response properties of SOC neurons. In particular, understanding of the sensitivity to interaural time differences (ITDs) in neurons of the medial and lateral superior olive (MSO and LSO) requires knowledge of the temporal firing properties of the monaural excitatory and inhibitory inputs to these neurons...
July 12, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28697658/determining-the-minimum-number-of-electrodes-that-need-to-be-pitch-matched-to-accurately-estimate-pitch-matches-across-the-array
#18
Julia Stelmach, David M Landsberger, Monica Padilla, Justin M Aronoff
OBJECTIVE: With bilateral cochlear implant (CI) users there is typically a place mismatch between the locations stimulated by the left and right electrode arrays. This mismatch can affect performance, potentially limiting binaural benefits. One way to address this is by perceptually realigning the arrays such that a given frequency in the input stimulates perceptually matched locations in the two ears. A clinically feasible technique is needed that can determine the appropriate perceptual alignment...
July 12, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28690556/sound-spectrum-influences-auditory-distance-perception-of-sound-sources-located-in-a-room-environment
#19
Ignacio Spiousas, Pablo E Etchemendy, Manuel C Eguia, Esteban R Calcagno, Ezequiel Abregú, Ramiro O Vergara
Previous studies on the effect of spectral content on auditory distance perception (ADP) focused on the physically measurable cues occurring either in the near field (low-pass filtering due to head diffraction) or when the sound travels distances >15 m (high-frequency energy losses due to air absorption). Here, we study how the spectrum of a sound arriving from a source located in a reverberant room at intermediate distances (1-6 m) influences the perception of the distance to the source. First, we conducted an ADP experiment using pure tones (the simplest possible spectrum) of frequencies 0...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28688548/eeg-activity-as-an-objective-measure-of-cognitive-load-during-effortful-listening-a-study-on-pediatric-subjects-with-bilateral-asymmetric-sensorineural-hearing-loss
#20
Pasquale Marsella, Alessandro Scorpecci, Giulia Cartocci, Sara Giannantonio, Anton Giulio Maglione, Isotta Venuti, Ambra Brizi, Fabio Babiloni
OBJECTIVES: Deaf subjects with hearing aids or cochlear implants generally find it challenging to understand speech in noisy environments where a great deal of listening effort and cognitive load are invested. In prelingually deaf children, such difficulties may have detrimental consequences on the learning process and, later in life, on academic performance. Despite the importance of such a topic, currently, there is no validated test for the assessment of cognitive load during audiological tasks...
August 2017: International Journal of Pediatric Otorhinolaryngology
keyword
keyword
15121
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"