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https://www.readbyqxmd.com/read/28227326/detection-of-binaural-interaction-in-free-field-evoked-auditory-brainstem-responses-by-time-scale-representations
#1
Erik Schebsdat, Horst Hessel, Harald Seidler, Daniel J Strauss, Erik Schebsdat, Horst Hessel, Harald Seidler, Daniel J Strauss, Horst Hessel, Erik Schebsdat, Harald Seidler, Daniel J Strauss
The so called β-wave of the binaural interaction component (BIC) in auditory brainstem responses (ABR) has been shown to be an objective measure for binaural interaction (BI). This component is the arithmetical difference between the sum of the monaurally evoked ABRs and the binaurally evoked ABR. Unfortunately, these neural responses are known to be very fragile and as a result the calculated BIC. An additional issue is, that the findings of this measurement are predominantly needed in people with hearing loss who may use hearing devices like hearing aids (HA) or cochlear implants (CI), thus they are not able to use headphones (like in conventional ABR measurements) during the detection of possible BI...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28188428/cochlear-implant-treatment-of-patients-with-single-sided-deafness-or-asymmetric-hearing-loss
#2
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 (Bi)CROS hearing aids ((Bi)CROS-HA, (Bi)CROS), bone conduction devices (BCI) or with cochlear implants (CI). Unfortunately, only small case series have been published on the 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 therapy options of BCI and (Bi)CROS in a large number of patients...
February 10, 2017: HNO
https://www.readbyqxmd.com/read/28166088/directional-microphone-contralateral-routing-of-signals-in-cochlear-implant-users-a-within-subjects-comparison
#3
Wilhelm Wimmer, Martin Kompis, Christof Stieger, Marco Caversaccio, Stefan Weder
OBJECTIVES: For medical or financial reasons, bilateral cochlear implantation is not always possible in bilaterally deafened patients. In such cases, a contralateral routing of signals (CROS) device could complement the monaural implant. The goal of our study was to compare the benefit of three different conditions: (1) unilateral cochlear implant (CI) alone, (2) unilateral CI complemented with a directional CROS microphone, and (3) bilateral CIs. DESIGN: Twelve bilateral experienced CI users were tested...
February 2, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28147600/sequential-stream-segregation-in-normally-hearing-and-cochlear-implant-listeners
#4
Viral D Tejani, Kara C Schvartz-Leyzac, Monita Chatterjee
Sequential stream segregation by normal hearing (NH) and cochlear implant (CI) listeners was investigated using an irregular rhythm detection (IRD) task. Pure tones and narrowband noises of different bandwidths were presented monaurally to older and younger NH listeners via headphones. For CI users, stimuli were delivered as pure tones via soundfield and via direct electrical stimulation. Results confirmed that tonal pitch is not essential for stream segregation by NH listeners and that aging does not reduce NH listeners' stream segregation...
January 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28102912/different-spatio-temporal-eeg-features-drive-the-successful-decoding-of-binaural-and-monaural-cues-for-sound-localization
#5
Adam Bednar, Francis M Boland, Edmund C Lalor
The human ability to localize sound is essential for monitoring the environment and helps us to analyze complex auditory scenes. Although the acoustic cues mediating sound localization have been established, it remains unknown how these cues are represented in human cortex. In particular, it is still a point of contention whether binaural and monaural cues are processed by the same or distinct cortical networks. In this study, participants listened to a sequence of auditory stimuli from different spatial locations while we recorded their neural activity using electroencephalography (EEG)...
January 19, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28045838/effect-of-context-and-hearing-loss-on-time-gated-word-recognition-in-children
#6
Dawna Lewis, Judy Kopun, Ryan McCreery, Marc Brennan, Kanae Nishi, Evan Cordrey, Pat Stelmachowicz, Mary Pat Moeller
OBJECTIVES: The purpose of this study was to examine word recognition in children who are hard of hearing (CHH) and children with normal hearing (CNH) in response to time-gated words presented in high- versus low-predictability sentences (HP, LP), where semantic cues were manipulated. Findings inform our understanding of how CHH combine cognitive-linguistic and acoustic-phonetic cues to support spoken word recognition. It was hypothesized that both groups of children would be able to make use of linguistic cues provided by HP sentences to support word recognition...
December 30, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/28043881/simultaneously-evoked-auditory-potentials-seap-a-new-method-for-concurrent-measurement-of-cortical-and-subcortical-auditory-evoked-activity
#7
Christopher Slugocki, Daniel Bosnyak, Laurel J Trainor
Recent electrophysiological work has evinced a capacity for plasticity in subcortical auditory nuclei in human listeners. Similar plastic effects have been measured in cortically-generated auditory potentials but it is unclear how the two interact. Here we present Simultaneously-Evoked Auditory Potentials (SEAP), a method designed to concurrently elicit electrophysiological brain potentials from inferior colliculus, thalamus, and primary and secondary auditory cortices. Twenty-six normal-hearing adult subjects (mean 19...
December 31, 2016: Hearing Research
https://www.readbyqxmd.com/read/28036411/the-acceptable-noise-level-and-the-pure-tone-audiogram
#8
K Jonas Brännström, Steen Østergaard Olsen
Purpose: The vast majority of previous studies suggest that there is no relationship between the acceptable noise level (ANL) and pure-tone hearing thresholds reported as the average pure-tone hearing thresholds (pure-tone average). This study aims to explore (a) the relationship between hearing thresholds at individual frequencies and the ANL and (b) a measure of the slope of the audiogram and ANL. Method: Sixty-three Danish adult hearing aid users participated...
December 30, 2016: American Journal of Audiology
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/27995277/-cochlear-implant-treatment-of-patients-with-single-sided-deafness-or-asymmetric-hearing-loss-german-version
#10
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/27973669/pure-tone-spondee-threshold-relationships-in-functional-hearing-loss-a-test-of-loudness-contribution
#11
Robert S Schlauch, Heekyung J Han, Tzu-Ling J Yu, Edward Carney
Purpose: The purpose of this article is to examine explanations for pure-tone average-spondee threshold differences in functional hearing loss. Method: Loudness magnitude estimation functions were obtained from 24 participants for pure tones (0.5 and 1.0 kHz), vowels, spondees, and speech-shaped noise as a function of level (20-90 dB SPL). Participants listened monaurally through earphones. Loudness predictions were obtained for the same stimuli by using a computational, dynamic loudness model...
January 1, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/27917394/a-deep-ensemble-learning-method-for-monaural-speech-separation
#12
Xiao-Lei Zhang, DeLiang Wang
Monaural speech separation is a fundamental problem in robust speech processing. Recently, deep neural network (DNN)-based speech separation methods, which predict either clean speech or an ideal time-frequency mask, have demonstrated remarkable performance improvement. However, a single DNN with a given window length does not leverage contextual information sufficiently, and the differences between the two optimization objectives are not well understood. In this paper, we propose a deep ensemble method, named multicontext networks, to address monaural speech separation...
March 2016: IEEE/ACM Transactions on Audio, Speech, and Language Processing
https://www.readbyqxmd.com/read/27914414/spatial-attention-in-bilateral-cochlear-implant-users
#13
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/27908080/behavioral-manifestations-of-audiometrically-defined-slight-or-hidden-hearing-loss-revealed-by-measures-of-binaural-detection
#14
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/27849607/evolution-of-directional-hearing-in-moths-via-conversion-of-bat-detection-devices-to-asymmetric-pressure-gradient-receivers
#15
Andrew Reid, Thibaut Marin-Cudraz, James F C Windmill, Michael D Greenfield
Small animals typically localize sound sources by means of complex internal connections and baffles that effectively increase time or intensity differences between the two ears. However, some miniature acoustic species achieve directional hearing without such devices, indicating that other mechanisms have evolved. Using 3D laser vibrometry to measure tympanum deflection, we show that female lesser waxmoths (Achroia grisella) can orient toward the 100-kHz male song, because each ear functions independently as an asymmetric pressure gradient receiver that responds sharply to high-frequency sound arriving from an azimuth angle 30° contralateral to the animal's midline...
November 29, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27846038/comparison-of-speech-in-noise-and-localization-benefits-in-unilateral-hearing-loss-subjects-using-contralateral-routing-of-signal-hearing-aids-or-bone-anchored-implants
#16
Hillary A Snapp, Fred D Holt, Xuezhong Liu, Suhrud M Rajguru
OBJECTIVE: To compare the benefit of wireless contralateral routing of signal (CROS) technology to bone-anchored implant (BAI) technology in monaural listeners. STUDY DESIGN: Prospective, single-subject. SETTING: Tertiary academic referral center. PATIENTS: Adult English speaking subjects using either a CROS hearing aid or BAI as treatment for unilateral severe-profound hearing loss. INTERVENTIONS: Aided performance utilizing the subjects BAI or CROS hearing device...
January 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/27816972/vestibular-schwannoma-resection-with-ipsilateral-simultaneous-cochlear-implantation-in-patients-with-normal-contralateral-hearing
#17
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...
2016: Audiology & Neuro-otology
https://www.readbyqxmd.com/read/27810286/spatial-and-non-spatial-multisensory-cueing-in-unilateral-cochlear-implant-users
#18
Francesco Pavani, Marta Venturini, Francesca Baruffaldi, Luca Artesini, Francesca Bonfioli, Giuseppe Nicolò Frau, Wieske van Zoest
In the present study we examined the integrity of spatial and non-spatial multisensory cueing (MSC) mechanisms in unilateral CI users. We tested 17 unilateral CI users and 17 age-matched normal hearing (NH) controls in an elevation-discrimination task for visual targets delivered at peripheral locations. Visual targets were presented alone (visual-only condition) or together with abrupt sounds that matched or did not match the location of the visual targets (audio-visual conditions). All participants were also tested in simple pointing to free-field sounds task, to obtain a basic measure of their spatial hearing ability in the naturalistic environment in which the experiment was conducted...
October 31, 2016: Hearing Research
https://www.readbyqxmd.com/read/27794303/on-zwicker-tones-and-musical-pitch-in-the-likely-absence-of-phase-locking-corresponding-to-the-pitch
#19
Hedwig E Gockel, Robert P Carlyon
It was assessed whether Zwicker tones (ZTs) (an auditory afterimage produced by a band-stop noise) have a musical pitch. First (stage I), musically trained subjects adjusted the frequency, level, and decay time of an exponentially decaying diotic sinusoid to sound similar to the ZT they perceived following the presentation of diotic broadband noise, for various band-stop positions. Next (stage II), subjects adjusted a sinusoid in frequency and level so that its pitch was a specified musical interval below that of either a preceding ZT or a preceding sinusoid, and so that it was equally loud...
October 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27787393/the-relationship-between-intensity-coding-and-binaural-sensitivity-in-adults-with-cochlear-implants
#20
Ann E Todd, Matthew J Goupell, Ruth Y Litovsky
OBJECTIVES: Many bilateral cochlear implant users show sensitivity to binaural information when stimulation is provided using a pair of synchronized electrodes. However, there is large variability in binaural sensitivity between and within participants across stimulation sites in the cochlea. It was hypothesized that within-participant variability in binaural sensitivity is in part affected by limitations and characteristics of the auditory periphery which may be reflected by monaural hearing performance...
March 2017: Ear and Hearing
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