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Results 251 - 300 of 1455
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Nakajima Hideko H HH Eaton-Peabody Laboratory, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts 02114, USA. - - 2012
The goal of the present study was to investigate the clinical utility of measurements of ear-canal reflectance (ECR) in a population of patients with conductive hearing loss in the presence of an intact, healthy tympanic membrane and an aerated middle ear. We also sought to compare the diagnostic accuracy of ...
Li Songhai - - 2012
Emitted biosonar clicks and auditory evoked potential (AEP) responses triggered by the clicks were synchronously recorded during echolocation in an Atlantic bottlenose dolphin (Tursiops truncatus) trained to wear suction-cup EEG electrodes and to detect targets by echolocation. Three targets with target strengths of -34, -28, and -22 dB were used ...
Crane Benjamin T - - 2012
Heading direction is determined from visual and vestibular cues. Both sensory modalities have been shown to have better direction discrimination for headings near straight ahead. Previous studies of visual heading estimation have not used the full range of stimuli, and vestibular heading estimation has not previously been reported. The current ...
Kang Xiaoxu X Department of Biomedical Engineering, The Johns Hopkins University, Baltimore, MD, USA. - - 2012
Previous works in Brain-Machine Interfaces (BMI) have mostly used a single Kalman filter decoder for deriving continuous kinematics in the complete execution of behavioral tasks. A linear dynamical system may not be able to generalize the sequence whose dynamics changes over time. Examples of such data include human motion such ...
Fu Joanne J Graduate School of Biomedical Engineering, The University of New South Wales, Sydney, - - 2012
How complex tactile sensations are encoded by populations of afferent mechanoreceptors is currently not well understood. While much is known about how individual afferents respond to prescribed stimuli, their behavior as a population distributed across the fingertip has not been well described. In this study, tactile afferent mechanoreceptors in monkey ...
Willett Francis R FR Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL 60637, USA. - - 2012
Typically, brain-machine interfaces that enable the control of a prosthetic arm work by decoding a subjects' intended hand position or velocity and using a controller to move the arm accordingly. Researchers taking this approach often choose to decode the subjects' desired arm state in the present moment, which causes the ...
Dykstra Andrew R - - 2012
It is well known that damage to the peripheral auditory system causes deficits in tone detection as well as pitch and loudness perception across a wide range of frequencies. However, the extent to which to which the auditory cortex plays a critical role in these basic aspects of spectral processing, ...
Richard Céline - - 2012
This study aimed to evaluate the interaction of electric and acoustic cues in diotic condition in cochlear implantees. Five adult cochlear implantees with residual contralateral hearing were prospectively evaluated in hearing aid only (HA), cochlear implant only (CI), and HA + CI modes by audiometry (pure tone, dissyllabic words, and ...
Li Yue Y Qiushi Academy of Advanced Studies and College of Biomedical Engineering and Instrumental Science, Zhejiang University, Hangzhou, 310027 PR China. - - 2012
Recently, local field potentials (LFPs) have been successfully used to extract information of arm and hand movement in some brain-machine interfaces (BMIs) studies, which suggested that LFPs would improve the performance of BMI applications because of its long-term stability. However, the performance of LFPs in different frequency bands has not ...
Wang Dong D Qiushi Academy for Advanced Studies and Department of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, - - 2012
Local field potentials (LFP) are valuable signals for decoding motor kinematics in brain machine interfaces (BMIs). To take full advantage of LFPs, however, more systematic investigation of the relationship between LFPs and ipsilateral limb movement is required. In this paper we investigated the decoding power of LFPs for the ipsilateral ...
Howe Piers D L - - 2012
In everyday life, observers often need to visually track moving objects. Currently, there is a debate as to whether observers utilize motion information in doing this or whether they rely purely on positional information (e.g., frame-by-frame locations). In our experiments, we had observers keep track of a subset of moving ...
Arechvo Irina - - 2012
The aim of the study was to investigate the validity of the avian middle ear model for researching the tympanoplasty mechanics. We studied the morphological details, acoustic transmission and quasi-static behavior of the ostrich tympano-ossicular system. The stained specimens of the ostrich middle ear were examined under a light microscope. ...
Song Huaying H Department of Biomedical Engineering, Tsinghua University, Beijing 100084, - - 2012
The N200 speller is a non-flashing visual brain-computer interface (BCI) using motion-onset visual evoked potentials (mVEPs). Previous N200 speller was implemented at the scalp EEG level. Compared to scalp EEG, electrocorticography (ECoG) provides a broader frequency band that could be utilized in BCI. In this study, we investigated whether the ...
Hofmann Michael - - 2012
Objective: Neonatal hearing screening programs in Flanders and the Netherlands use Natus ALGO screening devices. Since 2006 in Flanders and 2009 in the Netherlands, both programs have replaced the older ALGO Portable devices with the newer ALGO 3i devices. However, in both countries, ALGO 3i devices have a significantly higher ...
Peng Gang - - 2011
PURPOSE: This study investigates the impact of inter-talker variations on the process of mapping acoustic variations onto tone categories in two different tone languages. METHOD: Pitch stimuli manipulated from four voice ranges were presented in isolation via a blocked-talker design. Listeners were instructed to identify the stimuli that they heard ...
Green Tim - - 2012
To assess the reliability of across-ear, acoustic-electric pitch/timbre comparisons for determining effective characteristic frequencies of cochlear implant electrodes. Nine CI users with contralateral residual acoustic hearing. Absolute acoustic thresholds in the unimplanted ear were measured and frequency selectivity was assessed via psychophysical tuning curves. An adjustment method was used to ...
Kulkarni Pandurangarao N PN Department of Electrical Engineering, Indian Institute of Technology Bombay, Powai, Maharashtra, - - 2012
The objective of the study was to evaluate the effectiveness of binaural dichotic presentation using comb filters with complementary magnitude responses, based on fixed bandwidth and auditory critical bandwidth, in improving speech perception by persons with moderate bilateral sensorineural hearing loss, and to assess its effect on localization of the ...
Simmons Andrea Megela - - 2012
In their shallow-water habitats, bullfrog (Rana catesbeiana) tadpoles are exposed to both underwater and airborne sources of acoustic stimulation. We probed the representation of underwater particle motion throughout the tadpole's dorsal medulla to determine its spatial extent over larval life. Using neurobiotin-filled micropipettes, we recorded neural activity to z-axis particle ...
Swink Shannon - - 2011
PURPOSE: The effects of type of stimuli (i.e., non-speech vs. speech), speech (i.e., natural vs. synthetic), gender of speaker and listener, speaker (i.e., self vs. other), and frequency alteration in self-produced speech on the late auditory cortical evoked potential were examined. METHOD: Normal hearing young adult males (n = 15) ...
Lilaonitkul Watjana - - 2012
The medial-olivocochlear (MOC) acoustic reflex is thought to provide frequency-specific feedback that adjusts the gain of cochlear amplification, but little is known about how frequency specific the reflex actually is. We measured human MOC tuning through changes in stimulus frequency otoacoustic emissions (SFOAEs) from 40-dB-SPL tones at probe frequencies (f(p)s) ...
Kirk Katherine M KM The University of Queensland, Centre for Military and Veterans' Health, Mayne Medical School, Brisbane, Australia. - - 2012
To investigate the relationship between self-reported and audiometrically-measured hearing loss in a sample of Australian Defence Force personnel. Responses to a question regarding hearing problems were compared with contemporaneous audiometric data. 3335 members of the Australian Defence Force for whom anonymised medical records were available. The sensitivity of self-report data ...
Ning Xiaopeng - - 2011
BACKGROUND: Electromyography-assisted (EMG-assisted) biomechanical models are used to characterize the muscle and joint reaction forces in the lumbar region. However, during a full-range trunk flexion, there is a transition of extension moment from the trunk extensor muscles to the passive tissues of the low back, indicating that the empirical EMG ...
Mulvey Matthew R - - 2011
Objectives:  In able-bodied participants, it is possible to induce a sense of perceptual embodiment in an artificial hand using a visual-tactile illusion. In amputee patients, electrical stimulation of sensory afferents using transcutaneous electrical nerve stimulation (TENS) has been shown to generate somatic sensations in an amputee's phantom limb(s). However, the ...
Schneiderová Irena - - 2011
The Anatolian ground squirrel Spermophilus xanthoprymnus like other ground-dwelling sciurids, emits alarm calls in the presence of predators. In this study, we provide a description of the acoustic structure of alarm call of this species and compare it to those of two closely related species, the Taurus ground squirrel Spermophilus ...
Carlyon Robert P RP MRC Cognition & Brain Sciences Unit, 15 Chaucer Rd., Cambridge, CB2 7EF, UK. - - 2012
When a pure tone or low-numbered harmonic is presented to a listener, the resulting travelling wave in the cochlea slows down at the portion of the basilar membrane (BM) tuned to the input frequency due to the filtering properties of the BM. This slowing is reflected in the phase of ...
Rabinowitz Neil C NC Department of Physiology, Aantomy and Genetics, University of Oxford, Parks Road, Oxford OX1 3PT, UK. - - 2011
A recent study provides intriguing insights into how we recognize the sound of everyday objects from the statistical properties of the textures they produce.
Sekhar Deepa L - - 2011
To compare a protocol for pure-tone threshold testing, capable of detecting high-frequency hearing loss as indicated by notched audiometric configurations, with the current school rapid hearing screen and to determine typical adolescent noise exposures associated with notched audiometric configurations. In conjunction with required school rapid hearing screening, a pure-tone threshold ...
Heupa Adriana Betes - - 2011
Shooting is an activity that exposes military personnel to noise impact, which may cause irreversible effects on hearing. OBJECTIVE: To evaluate impact noise on the hearing of military personnel that practice shooting. STUDY DESIGN: A case-control retrospective study. METHODS: 115 military personnel were enrolled; 65 had been exposed to impact ...
Nishiyama Kohei - - 2011
The vocalization behavior of Mongolian gerbils, a model animal of auditory physiology, was examined. A pair of gerbils was placed in a chamber, and their species-specific vocalizations and locomotive behaviors were recorded and analyzed. Two types of calls were predominantly produced: high-frequency upward frequency-modulated (HU-FM) calls and low-frequency multi-harmonic frequency-modulated ...
Oliveira Aline Cabral de - - 2011
Vestibular evoked myogenic potentials are vestibulocervical reflexes resulting from sacculus stimulation with strong intensity sounds. Normality parameters are necessary for young normal individuals, using low frequency stimuli, which configure the most sensitive region of this sensory organ. AIM: To establish vestibular evoked myogenic potential standards for low frequency stimulation. MATERIAL ...
Campos Ualace de Paula - - 2011
Different studies have been carried out in order to correlate audiometric thresholds and distortion product otoacoustic emissions measurements (DPOAE). However, high variability and external interferences make hearing thresholds estimates by means of the DPOAE very little sensitive. The aim of this study was to check the correspondence between the pure ...
Yong Jeon Jin - - 2011
The aim of this study is to characterize urban spaces, which combine landscape, acoustics, and lighting, and to investigate people's perceptions of urban soundscapes through quantitative and qualitative analyses. A general questionnaire survey and soundwalk were performed to investigate soundscape perception in urban spaces. Non-auditory factors (visual image, day lighting, ...
Hamed Sherifa Ahmad - - 2011
PURPOSE: In this study, we aimed to determine the function of the cochlea and peripheral and central auditory pathways with migraine. MATERIALS AND METHODS: Fifty-eight patients with migraine and 40 healthy subjects were assessed using routine diagnostic audiometry along with transient evoked otoacoustic emissions (TOAEs), distortion product otoacoustic emissions (DPOAEs), ...
Arch Victoria S VS Abbott Vascular Inc., 3200 Lakeside Drive, Santa Clara, CA 95054 2807, - - 2012
Three species of anuran amphibians (Odorrana tormota, Odorrana livida and Huia cavitympanum) have recently been found to detect ultrasounds. We employed immunohistochemistry and confocal microscopy to examine several morphometrics of the inner ear of these ultrasonically sensitive species. We compared morphological data collected from the ultrasound-detecting species with data from ...
Horn Folkert K - - 2011
PurposeThere is evidence that multifocal visual evoked potentials (VEPs) can be used as an objective tool to detect visual field loss. The aim of this study was to correlate multifocal VEP amplitudes with standard perimetry data and retinal nerve fibre layer (RNFL) thickness.MethodMultifocal VEP recordings were performed with a four-channel ...
Feng J J Southern Connecticut State University, New Haven, - - 2012
To study the mechanisms of noise-induced hearing loss and the phantom noise, or tinnitus, often associated with it, we used a mouse model of noise damage designed for reproducible and quantitative structural analyses. We selected the posteroventral cochlear nucleus, which has shown considerable plasticity in past studies, and correlated its ...
Land Michael F - - 2011
Survival in the deep sea depends on seeing others without being seen yourself. A recent study examined two switchable camouflage strategies in cephalopods: transparency and dark pigmentation.
Maslovat Dana - - 2011
We investigated the processes underlying stimulus-response compatibility by using a lateralized auditory stimulus in a simple and choice reaction time (RT) paradigm. Participants were asked to make either a left or right key lift in response to either a control (80dB) or startling (124dB) stimulus presented to either the left ...
Gao Li L School of Physics, Shandong University, Jinan, - - 2011
A large number of mammals, including humans, have intricate outer ear shapes that diffract incoming sound in a direction- and frequency-specific manner. Through this physical process, the outer ear shapes encode sound-source information into the sensory signals from each ear. Our results show that horseshoe bats could dynamically control these ...
Boyd Benjamin S - - 2011
STUDY DESIGN: Clinical measurement pilot study. INTRODUCTION: Upper limb neurodynamic testing (ULNT1) uses interlimb comparisons to investigate nerve sensitivity to movement. PURPOSE OF THE STUDY: To establish the magnitude of range of motion asymmetries between limbs and the frequency of neurogenic sensory responses during ULNT1. METHODS: Elbow extension range of ...
Goerlitz Holger R - - 2011
Fast movement in complex environments requires the controlled evasion of obstacles. Sonar-based obstacle evasion involves analysing the acoustic features of object-echoes (e.g., echo amplitude) that correlate with this object's physical features (e.g., object size). Here, we investigated sonar-based obstacle evasion in bats emerging in groups from their day roost. Using ...
Alain Claude - - 2011
Older adults presented with short (i.e., 40 ms) harmonic complex tones show a reduced likelihood of hearing the mistuned harmonic as a separate sound. Here, we examined whether this age difference for the mistuned harmonic would generalize to a longer signal duration (i.e., 200 ms). We measured auditory evoked fields (AEFs) using ...
Vyskocil A - - 2011
There is accumulating epidemiological evidence that exposure to some solvents, metals, asphyxiants and other substances in humans is associated with an increased risk of acquiring hearing loss. Furthermore, simultaneous and successive exposure to certain chemicals along with noise can increase the susceptibility to noise-induced hearing loss. There are no regulations ...
Most Tova - - 2011
Binaural hearing in cochlear implant (CI) users can be achieved either by bilateral implantation or bimodally with a contralateral hearing aid (HA). Binaural-bimodal hearing has the advantage of complementing the high-frequency electric information from the CI by low-frequency acoustic information from the HA. We examined the contribution of a contralateral ...
Nowotny Manuela - - 2011
Tinnitus often develops following inner ear pathologies, like acoustic trauma. Therefore, an acoustic trauma model of tinnitus in gerbils was established using a modulated acoustic startle response. Cochlear trauma evoked by exposure to narrow-band noise at 10 kHz was assessed by auditory brainstem responses (ABR) and distortion product otoacoustic emissions ...
Roy Sabyasachi S Laboratory of Auditory Neurophysiology, Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, - - 2011
The natural environment is inherently noisy with acoustic interferences. It is, therefore, beneficial for a species to modify its vocal production to effectively communicate in the presence of interfering noises. Non-human primates have been traditionally considered to possess limited voluntary vocal control, but little is known about their ability to ...
Hummel Jennifer - - 2011
In the auditory system of bushcrickets, sound can reach the receptors via two different paths: (i) by acting on the outside of the tympana situated on both sides of each foreleg or (ii) through the acoustic trachea that opens at a spiracle on the thorax. While the spiracle is considered ...
Ohashi Toru - - 2011
Abstract Conclusion: We studied the compound action potential (AP) recovery from adaptation (AP recovery) in idiopathic sensorineural hearing loss (iSSNHL). Abnormal AP recovery was demonstrated in 15 of 45 patients, consisting of increased recovery (iR) over the normal range in 11 ears and decreased recovery (dR) under the normal range ...
Lasisi Akeem Olawale - - 2011
Abstract Conclusion: Low plasma melatonin is significant in the development of high frequency hearing loss (HL) among the elderly. Objective: To determine the correlation between hearing threshold and the plasma melatonin and ascorbic acid (vitamin C). Methods: This was a cross-sectional study involving 126 apparently healthy elderly subjects, 59 males ...
Stilp Christian E CE Department of Psychology, University of Wisconsin-Madison, 1202 West Johnson Street, Madison, Wisconsin 53706, USA. - - 2011
To the extent that sensorineural systems are efficient, stimulus redundancy should be captured in ways that optimize information transmission. Consistent with this principle, neural representations of sounds have been proposed to become "non-isomorphic," increasingly abstract and decreasingly resembling the original (redundant) input. Here, non-isomorphism is tested in perceptual learning using ...
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