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https://www.readbyqxmd.com/read/27909837/simultaneous-intracochlear-pressure-measurements-from-two-cochlear-locations-propagation-of-distortion-products-in-gerbil
#1
Wei Dong
Sound energy propagates in the cochlea through a forward-traveling or slow wave supported by the cochlear partition and fluid inertia. Additionally, cochlear models support traveling wave propagation in the reverse direction as the expected mechanism for conveying otoacoustic emissions out of the cochlea. Recently, however, this hypothesis has been questioned, casting doubt on the process by which otoacoustic emissions travel back out through the cochlea. The proposed alternative reverse travel path for emissions is directly through the fluids of the cochlea as a compression pressure in the form of a fast wave...
December 1, 2016: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/27909101/changes-in-properties-of-auditory-nerve-synapses-following-conductive-hearing-loss
#2
Xiaowen Zhuang, Wei Sun, Matthew A Xu-Friedman
: Auditory activity plays an important role in the development of the auditory system. Decreased activity can result from conductive hearing loss (CHL) associated with otitis media, which may lead to long-term perceptual deficits. The effects of CHL have been mainly studied at later stages of the auditory pathway, but early stages remain less examined. However, changes in early stages could be important, because they would affect how information about sounds is conveyed to higher order areas for further processing and localization...
December 1, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27908059/parameter-study-of-time-delay-magnification-in-a-biologically-inspired-mechanically-coupled-acoustic-sensor-array
#3
Ming Yang, Xinlei Zhu, Yaqiong Zhang, Na Ta, Zhushi Rao
Sound source localization uses interaural time difference (ITD) or interaural intensity difference cues, and most of the methods based on ITD are limited by the aperture of array. However, a kind of parasitoid fly called Ormia ochracea with coupled ears has a remarkable ability to localize calling of crickets regardless of the fly's small body size. The structure of fly's ear is generalized, and a multi-dimensional coupled system with an acoustic sensor array is proposed. The magnification factor of the phase difference in this system, which can be used to describe the ITD changes of signals from the coupled system, is chosen as the kernel parameter to measure the effect of coupling...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27906298/high-resolution-brillouin-optical-correlation-domain-analysis-with-no-spectral-scanning
#4
Eyal Preter, Dexin Ba, Yosef London, Orel Shlomi, Yair Antman, Avi Zadok
Distributed Brillouin fiber sensors typically rely on the reconstruction of the steady-state Brillouin gain spectrum (BGS), through spectral scanning of the frequency offset between the pump and signal waves. In this work, we propose and demonstrate an alternative approach, in which the local Brillouin frequency shift (BFS) is extracted from temporal transient analysis of the step response of the amplified signal wave. Measurements are taken at only two arbitrary frequency offsets between pump and signal. No spectral scanning and no prior knowledge of a reference BGS are necessary...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27905959/development-of-a-metric-for-tracking-and-comparing-population-health-based-on-the-minimal-generic-set-of-domains-of-functioning-and-health
#5
Cornelia Oberhauser, Somnath Chatterji, Carla Sabariego, Alarcos Cieza
BACKGROUND: The following minimal set of valid health domains for tracking the health of both clinical and general populations has recently been proposed: 1) energy and drive functions, 2) emotional functions, 3) sensation of pain, 4) carrying out daily routine, 5) walking and moving around, and 6) remunerative employment. This study investigates whether these domains can be integrated into a sound psychometric measure to adequately assess, compare, and monitor the health of populations...
May 12, 2016: Population Health Metrics
https://www.readbyqxmd.com/read/27902494/an-ultrasound-look-at-korotkoff-sounds-the-role-of-pulse-wave-velocity-and-flow-turbulence
#6
Amir Benmira, Antonia Perez-Martin, Iris Schuster, Florent Veye, Jean Triboulet, Nicolas Berron, Isabelle Aichoun, Sarah Coudray, Jérémy Laurent, Fethi Bereksi-Reguig, Michel Dauzat
AIMS: The aim of this study was to analyze the temporal relationships between pressure, flow, and Korotkoff sounds, providing clues for their comprehensive interpretation. MATERIALS AND METHODS: When measuring blood pressure in a group of 23 volunteers, we used duplex Doppler ultrasonography to assess, under the arm-cuff, the brachial artery flow, diameter changes, and local pulse wave velocity (PWV), while recording Korotkoff sounds 10 cm downstream together with cuff pressure and ECG...
November 29, 2016: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/27899799/population-health-based-approaches-to-utilizing-digital-technology-a-strategy-for-equity
#7
Garth N Graham, MaryLynn Ostrowski, Alyse B Sabina
Health care disparities and high chronic disease rates burden many communities and disproportionally impact racial/ethnic populations in the United States. These disparities vary geographically, increase health care expenses, and result in shortened lifespans. Digital technologies may be one tool for addressing health disparities and improving population health by increasing individuals' access to health information-especially as most low-income U.S. residents gain access to smartphones. The Aetna Foundation partners with organizations to use digital technologies, including mobile applications, data collection, and related platforms, for learning and sharing...
November 2016: Journal of Public Health Policy
https://www.readbyqxmd.com/read/27893274/perceptual-adaptation-of-vowels-generalizes-across-the-phonology-and-does-not-require-local-context
#8
Kateřina Chládková, Václav Jonáš Podlipský, Anastasia Chionidou
Listeners usually understand without difficulty even speech that sounds atypical. When they encounter noncanonical realizations of speech sounds, listeners can make short-term adjustments of their long-term representations of those sounds. Previous research, focusing mostly on adaptation in consonants, has suggested that for perceptual adaptation to take place some local cues (lexical, phonotactic, or visual) have to guide listeners' interpretation of the atypical sounds. In the present experiment we investigated perceptual adaptation in vowels...
November 28, 2016: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/27891687/effect-of-preceding-stimulation-on-sound-localization-and-its-representation-in-the-auditory-midbrain
#9
Sandra Tolnai, Rainer Beutelmann, Georg M Klump
Prior stimulation can influence the perception of sound source location. Some psychophysical sound localization procedures differ in the amount of prior stimulation, which may affect measures of localization accuracy. If and how particularly the number of preceding stimuli affects sound localization and the neural representation of sound source position has not been investigated so far and will be the focus of the present report. We trained Mongolian gerbils in a left/right discrimination task where the target stimulus was preceded by silence or followed a number of reference stimuli...
November 27, 2016: European Journal of Neuroscience
https://www.readbyqxmd.com/read/27891078/neural-and-response-correlations-to-complex-natural-sounds-in-the-auditory-midbrain
#10
Dominika Lyzwa, Florentin Wörgötter
How natural communication sounds are spatially represented across the inferior colliculus, the main center of convergence for auditory information in the midbrain, is not known. The neural representation of the acoustic stimuli results from the interplay of locally differing input and the organization of spectral and temporal neural preferences that change gradually across the nucleus. This raises the question of how similar the neural representation of the communication sounds is across these gradients of neural preferences, and whether it also changes gradually...
2016: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/27888824/clinico-radiological-parameters-predicting-early-diagnosis-of-foreign-body-aspiration-in-children
#11
Pradipta Kumar Parida, Nirmal Shanmugasundaram, Surianarayanan Gopalakrishnan
OBJECTIVES: This study aims to investigate clinical and radiological findings to make early diagnosis of foreign body (FB) aspiration in children. PATIENTS AND METHODS: This prospective study was conducted on 45 children younger than 12 years with a clinical diagnosis of FB aspiration undergone rigid bronchoscopy between September 2010 and May 2014. The results of 37 children (22 males, 15 females; mean age 2.6 years; range 1 to 12 years) with positive for FB on bronchoscopy were analyzed...
September 2016: Kulak Burun Boğaz Ihtisas Dergisi: KBB, Journal of Ear, Nose, and Throat
https://www.readbyqxmd.com/read/27881784/low-somatic-sodium-conductance-enhances-action-potential-precision-in-time-coding-auditory-neurons
#12
Yang Yang, Bina Ramamurthy, Andreas Neef, Matthew A Xu-Friedman
: Auditory nerve fibers encode sounds in the precise timing of action potentials (APs), which is used for such computations as sound localization. Timing information is relayed through several cell types in the auditory brainstem that share an unusual property: their APs are not overshooting, suggesting that the cells have very low somatic sodium conductance (gNa). However, it is not clear how gNa influences temporal precision. We addressed this by comparing bushy cells (BCs) in the mouse cochlear nucleus with T-stellate cells (SCs), which do have normal overshooting APs...
November 23, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27880786/effects-of-pile-driving-on-the-residency-and-movement-of-tagged-reef-fish
#13
Joseph D Iafrate, Stephanie L Watwood, Eric A Reyier, Douglas M Scheidt, Georges A Dossot, Steven E Crocker
The potential effects of pile driving on fish populations and commercial fisheries have received significant attention given the prevalence of pile driving occurring in coastal habitats throughout the world. Behavioral impacts of sound generated from these activities on fish typically have a greater area of influence than physical injury, and may therefore adversely affect a greater portion of the local population. This study used acoustic telemetry to assess the movement, residency, and survival of 15 sheepshead (Archosargus probatocephalus) and 10 grey snapper (Lutjanus griseus) in Port Canaveral, Florida, USA, in response to 35 days of pile driving at a wharf complex...
2016: PloS One
https://www.readbyqxmd.com/read/27875575/auditory-time-frequency-masking-for-spectrally-and-temporally-maximally-compact-stimuli
#14
Thibaud Necciari, Bernhard Laback, Sophie Savel, Sølvi Ystad, Peter Balazs, Sabine Meunier, Richard Kronland-Martinet
Many audio applications perform perception-based time-frequency (TF) analysis by decomposing sounds into a set of functions with good TF localization (i.e. with a small essential support in the TF domain) using TF transforms and applying psychoacoustic models of auditory masking to the transform coefficients. To accurately predict masking interactions between coefficients, the TF properties of the model should match those of the transform. This involves having masking data for stimuli with good TF localization...
2016: PloS One
https://www.readbyqxmd.com/read/27867510/effect-of-adding-intrathecal-morphine-to-a-multimodal-analgesic-regimen-for-postoperative-pain-management-after-laparoscopic-bariatric-surgery-a-prospective-double-blind-randomized-controlled-trial
#15
Fatma Adel El Sherif, Ahmed Hassan Othman, Ahmad Mohammad Abd El-Rahman, Osama Taha
BACKGROUND: Pain control after bariatric surgery is a major challenge. Our objective was to study the efficacy and safety of intrathecal (IT) morphine 0.3 mg added to bupivacaine 0.5% for postoperative pain after laparoscopic bariatric surgery. METHODS: After local ethics committee approval, 100 morbidly obese patients scheduled for laparoscopic bariatric surgery were enrolled in this study. Patients were randomly assigned into two groups: Group I received IT 0...
November 2016: British Journal of Pain
https://www.readbyqxmd.com/read/27865551/objective-voice-analysis-of-pediatric-cochlear-implant-recipients-and-comparison-with-hearing-aids-users-and-hearing-controls
#16
Narges Jafari, Farzad Izadi, Abolfazl Salehi, Payman Dabirmoghaddam, Fariba Yadegari, Abbas Ebadi, Saeed Talebian Moghadam
OBJECTIVES: Phonation is influenced by hearing as a feedback mechanism. The purpose of the present study was to compare selected acoustic parameters in children using cochlear implants (CIs), those using hearing aids (HA), and their normal-hearing (NH) peers. METHODS: The participants were 15 children using CI (mean age: 72 months), 15 children using HA (mean age: 74 months), and 15 NH children (mean age: 77 months). The vowel /a/ was produced to measure perturbation and mean fundamental frequency...
November 16, 2016: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/27849607/evolution-of-directional-hearing-in-moths-via-conversion-of-bat-detection-devices-to-asymmetric-pressure-gradient-receivers
#17
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/27837259/auditory-spatial-representations-of-the-world-are-compressed-in-blind-humans
#18
Andrew J Kolarik, Shahina Pardhan, Silvia Cirstea, Brian C J Moore
Compared to sighted listeners, blind listeners often display enhanced auditory spatial abilities such as localization in azimuth. However, less is known about whether blind humans can accurately judge distance in extrapersonal space using auditory cues alone. Using virtualization techniques, we show that auditory spatial representations of the world beyond the peripersonal space of blind listeners are compressed compared to those for normally sighted controls. Blind participants overestimated the distance to nearby sources and underestimated the distance to remote sound sources, in both reverberant and anechoic environments, and for speech, music, and noise signals...
November 11, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27837258/accumulation-and-decay-of-visual-capture-and-the-ventriloquism-aftereffect-caused-by-brief-audio-visual-disparities
#19
Adam K Bosen, Justin T Fleming, Paul D Allen, William E O'Neill, Gary D Paige
Visual capture and the ventriloquism aftereffect resolve spatial disparities of incongruent auditory visual (AV) objects by shifting auditory spatial perception to align with vision. Here, we demonstrated the distinct temporal characteristics of visual capture and the ventriloquism aftereffect in response to brief AV disparities. In a set of experiments, subjects localized either the auditory component of AV targets (A within AV) or a second sound presented at varying delays (1-20 s) after AV exposure (A2 after AV)...
November 11, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27837213/-prosthetic-treatment-of-nasal-septal-perforations-results-with-custom-made-silicone-buttons
#20
K Zaoui, M H Schneider, O Neuner, P A Federspil
BACKGROUND: Perforations of the nasal septum can be very disturbing for patients due to increased crust formation, nose bleeds, obstruction of nasal breathing and whistling sounds during nasal breathing. The aim of this study was to evaluate how the symptom burden can be alleviated by custom-made silicone buttons derived from an impression mold. MATERIAL AND METHODS: A retrospective study was carried out to evaluate 45 patients with symptomatic septal perforations, who have been treated over a period of 8 years...
December 2016: HNO
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