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Binaural hearing

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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/28044024/an-auditory-illusion-reveals-the-role-of-streaming-in-the-temporal-misallocation-of-perceptual-objects
#3
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/28024462/predicting-the-perceptual-consequences-of-hidden-hearing-loss
#4
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
#5
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
#6
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/27997667/intelligibility-and-clarity-of-reverberant-speech-effects-of-wide-dynamic-range-compression-release-time-and-working-memory
#7
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
#8
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/27978586/-20-years-of-bilateral-cochlear-implantation-an-analysis-of-the-implanted-patients
#9
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
#10
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/27914414/spatial-attention-in-bilateral-cochlear-implant-users
#11
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
#12
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
#13
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
https://www.readbyqxmd.com/read/27896486/neural-correlates-of-the-binaural-masking-level-difference-in-human-frequency-following-responses
#14
Christopher G Clinard, Sarah L Hodgson, Mary Ellen Scherer
The binaural masking level difference (BMLD) is an auditory phenomenon where binaural tone-in-noise detection is improved when the phase of either signal or noise is inverted in one of the ears (SπNo or SoNπ, respectively), relative to detection when signal and noise are in identical phase at each ear (SoNo). Processing related to BMLDs and interaural time differences has been confirmed in the auditory brainstem of non-human mammals; in the human auditory brainstem, phase-locked neural responses elicited by BMLD stimuli have not been systematically examined across signal-to-noise ratio...
November 28, 2016: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/27893698/influence-of-acoustic-overstimulation-on-the-central-auditory-system-an-functional-magnetic-resonance-imaging-fmri-study
#15
Tomasz Wolak, Katarzyna Cieśla, Mateusz Rusiniak, Adam Piłka, Monika Lewandowska, Agnieszka Pluta, Henryk Skarżyński, Piotr H Skarżyński
BACKGROUND The goal of the fMRI experiment was to explore the involvement of central auditory structures in pathomechanisms of a behaviorally manifested auditory temporary threshold shift in humans. MATERIAL AND METHODS The material included 18 healthy volunteers with normal hearing. Subjects in the exposure group were presented with 15 min of binaural acoustic overstimulation of narrowband noise (3 kHz central frequency) at 95 dB(A). The control group was not exposed to noise but instead relaxed in silence...
November 28, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27885978/factors-affecting-daily-cochlear-implant-use-in-children-datalogging-evidence
#16
Vijayalakshmi Easwar, Joseph Sanfilippo, Blake Papsin, Karen Gordon
BACKGROUND: Children with profound hearing loss can gain access to sound through cochlear implants (CIs), but these devices must be worn consistently to promote auditory development. Although subjective parent reports have identified several factors limiting long-term CI use in children, it is also important to understand the day-to-day issues which may preclude consistent device use. In the present study, objective measures gathered through datalogging software were used to quantify the following in children: (1) number of hours of CI use per day, (2) practical concerns including repeated disconnections between the external transmission coil and the internal device (termed "coil-offs"), and (3) listening environments experienced during daily use...
November 2016: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/27878557/simple-reaction-time-for-broadband-sounds-compared-to-pure-tones
#17
Josef Schlittenlacher, Wolfgang Ellermeier, Gül Avci
Although many studies have explored the relation between reaction time (RT) and loudness, including effects of intensity, frequency, and binaural summation, comparable work on spectral summation is rare. However, most real-world sounds are not pure tones and typically have bandwidths covering several critical bands. Since comparing to a 1-kHz pure tone, the reference tone, is important for loudness measurement and standardization, the present work focuses on comparing RTs for broadband noise to those for 1-kHz pure tones in three experiments using different spectral and binaural configurations...
November 22, 2016: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/27869513/adverse-effects-of-pesticides-on-central-auditory-functions-in-tobacco-growers
#18
França Denise Maria Vaz Romano, Adriana Bender Moreira Lacerda, Diolen Lobato, Angela Ribas, Karin Ziliotto Dias, Tony Leroux, Adrian Fuente
OBJECTIVE: To investigate the effects of exposure to pesticides on the central auditory functions (CAF) of Brazilian tobacco growers. DESIGN: This was a cross-sectional study carried out between 2010 and 2012. Participants were evaluated with two behavioural procedures to investigate CAF, the random gap detection test (RGDT) and the dichotic digit test in Portuguese (DDT). STUDY SAMPLE: A total of 22 growers exposed to pesticides (study group) and 21 subjects who were not exposed to pesticides (control group) were selected...
November 21, 2016: International Journal of Audiology
https://www.readbyqxmd.com/read/27834100/sound-lateralization-ability-of-patients-with-bilateral-microtia-and-atresia-after-bilateral-reconstruction-of-auricles-and-external-auditory-canals-and-fitting-of-new-canal-type-hearing-aids-to-replace-a-bone-conduction-hearing-aid
#19
Kimitaka Kaga, Hirotaka Asato
CONCLUSION: Each of eight patients with bilateral microtia and atresia underwent bilateral reconstruction of the auricles and external auditory canals and were fitted bilateral canal-type hearing aids in the operated ears to replace a bone conduction hearing aid. The ability to discriminate inter-aural intensity difference (IID) and even inter-aural time difference (ITD) was retained in all these patients. OBJECTIVE: This study studied the post-operative sound lateralization ability of patients with bilateral microtia and atresia after total reconstruction of both auricles and external auditory canals, followed by fitting of bilateral canal-type hearing aids...
November 11, 2016: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/27816972/vestibular-schwannoma-resection-with-ipsilateral-simultaneous-cochlear-implantation-in-patients-with-normal-contralateral-hearing
#20
Mario Sanna, María Del Mar Medina, Aldin Macak, Gianluca Rossi, Valerio Sozzi, Sampath Chandra Prasad
OBJECTIVE: To report the hearing results of cochlear implantation simultaneous to vestibular schwannoma (VS) resection by means of a translabyrinthine approach in patients with normal contralateral hearing. METHODS: This was a prospective study including adults with sporadic VS. Tumors were resected by means of a modified translabyrinthine approach with preservation of the cochlear nerve. RESULTS: A total of 13 patients underwent cochlear implantation...
November 5, 2016: Audiology & Neuro-otology
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