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Nachtigall Paul E - - 2010
Noise that interferes with active echolocation can come from either outside sources or be self-generated. Our work on temporary threshold shifts has shown that either lower levels of anthropogenic noise presented for long time periods or intense sonar pings for short time periods can produce temporary reduction in sensitivity and ...
Li Feipeng - - 2010
The performance of hearing-impaired (HI) listeners to understand speech often deteriorates drastically in cocktail-party environments. To understand why a particular HI listener can hear certain sounds and not the others, it is critical that we take the prior knowledge about speech cues into consideration and investigate the effect of different ...
Grant Ken W - - 2010
Hearing technology has advanced to where it is now reasonable to ask whether signal processing algorithms can be developed to compensate for an individual's hearing loss, thus allowing them to hear functionally in a manner similar to persons with normal hearing. Clinically, the pure-tone audiogram is the primary tool used ...
Halvorsen Michele B - - 2010
There is significant concern that high-intensity sounds can impact fish physiology and behavior. Important sources of such sounds are commercial and military sonars. A recent publication reports that exposure to low-frequency active (LFA) sonar might result in hearing loss in some fish species, but did not damage any tissues [Popper ...
Nelson Peggy B - - 2010
Listeners with sensorineural hearing loss show reduced benefit from fluctuating compared to stationary maskers. Our hypothesis is that the representation of the signal in the dips is the most important predictor of performance [Jin and Nelson (2006)]. Because the audibility of the signal is the most critical factor, we tested ...
Feth Lawrence L - - 2010
Our recent study of spectrotemporal integration by human listeners with normal hearing has shown that the detection thresholds for signals made up of multiple bursts of brief tones improve as the number of bursts is increased. Elementary signals consisted of 10-ms tone bursts centered on 1 of 12 frequencies spaced ...
Gerges Samir N Y - - 2010
When using a hearing protector at the workplace, it is necessary to quantify its noise attenuation by laboratory measurements. This paper aims at developing an objective methodology for measuring hearing protector noise attenuation of earmuff type using "microphone in real ear" (MIRE) method. The methodology uses the "insertion loss" (IL) ...
Ramsier Marissa A - - 2010
Primates depend on acoustic signals and cues to avoid predators, locate food, and share information. Accordingly, the structure and function of acoustic stimuli have long been emphasized in studies of primate behavioral and cognitive ecology. Yet, few studies have addressed how well primates hear such stimuli; indeed, the auditory thresholds ...
Liberman M Charles - - 2010
This talk will review recent research on the cellular and molecular changes underlying noise-induced hearing loss (NIHL) and potential therapeutic approaches to its prevention andor mitigation. Topics will include (1) the functionally important structural changes underlying reversible versus irreversible NIHL, (2) the factors affecting vulnerability to NIHL, (3) the inadequacy ...
Kreisman Brian M - - 2010
This investigation examined whether speech intelligibility in noise can be improved using a new, binaural broadband hearing instrument system. Participants were 36 adults with symmetrical, sensorineural hearing loss (18 experienced hearing instrument users and 18 without prior experience). Participants were fit binaurally in a planned comparison, randomized crossover design study ...
Hastings Susan M - - 2010
The lined seahorse (Hippocampus erectus), a member of the family Syngnathidae (pipefishes and seahorses), occurs in coastal waters of the western Atlantic, Gulf of Mexico, and Caribbean Sea. This harmless species is listed as "vulnerable" on the International Union for the Conservation of Nature (IUCN) List of Threatened Species, meaning ...
Akeroyd Michael A - - 2010
The precedence effect indicates that the auditory system places most weight on spatial information at the onset of a sound. In this experiment, we measured how well hearing-impaired adults can ignore what comes immediately after the onset of a sound, as any limitations in that should interfere with localization in ...
Heffner Henry - - 2010
The behavioral audiograms of two female white-tailed deer (Odocoileus virginianus) were determined using a conditioned-suppression avoidance procedure. At a level of 60 dB sound pressure level, their hearing range extends from 115 Hz to 54 kHz with a best sensitivity of -3 dB at 8 kHz; increasing the intensity of ...
Hopkins Kathryn K Department of Experimental Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, England. - - 2010
Speech reception thresholds (SRTs) were measured for target and competing-speech signals, processed to contain variable amounts of temporal fine structure (TFS) information. Signals were filtered into 30 1-ERB(N) wide channels (where ERB(N) refers to the bandwidth of normal auditory filters), which were either tone vocoded, preserving temporal envelope information (extracted ...
Kates James M - - 2010
This paper considers the effects of dynamic-range compression on speech intelligibility and quality for hearing-impaired listeners. The paper focuses on a modification of compression in which the compression behavior for each frequency band is controlled by the peak amplitude within a frequency region surrounding the band. The stimuli are sentences ...
Mulsow Jason - - 2010
Detection of aerial vocal signals by conspecifics is important in the reproductive behavior of the otariid pinnipeds. However, aerial hearing sensitivity measurements have only been obtained for a few otariid individuals that were trained to participate in behavioral experiments. In order to expand upon this small data set, auditory steady-state ...
Murphy William J - - 2010
The proposed U.S. Environmental Protection Agency regulation for labeling hearing protection devices (HPDs) includes an impulsive noise reduction rating . In 2009, the American National Standards Institute Subcommittee for noise approved a revised standard for measuring the impulsive insertion loss of HPDs, ANSIASA S12.42-2009. The exposure at the ear in ...
Kates James M - - 2010
The focus in hearing aids is generally on speech, but the ability to reproduce music is also important for listener satisfaction. This study uses a sound quality metric to predict judgments of music quality made by normal-hearing and hearing-impaired listeners. A simulated hearing aid was used to process music modified ...
Moore Brian C J - - 2010
A model of loudness perception applicable to hearing-impaired people has been used to develop three methods for the initial fitting of hearing aids with multi-channel compression, based on the audiometric thresholds. Method one, CAMEQ, has the goals of amplifying speech so that, on average, the specific loudness is the same ...
Brungart Douglas S - - 2010
Military noise environments, and, in particular, the noise environments faced by dismounted soldiers on the battlefield, are characterized by wide variations in ambient level. Situations can quickly and unexpectedly change from quiet conditions where the sound of a snapping twig might alert the listener to hostile enemy activity to extreme ...
Allen Paul D - - 2010
Many reports have documented age-by-frequency increases in average auditory thresholds in various human populations. Despite this, the prevalence of different patterns of hearing loss in presbycusis remains uncertain. We examined 'presbycusis phenotypes' in a database of 960 subjects (552 female, 408 male, 18-92 years) that each had 30 measures of ...
Bohnert Andrea - - 2010
A multichannel non-linear frequency compression algorithm was evaluated in comparison to conventional amplification hearing aids using a test of speech understanding in noise (Oldenburger Satztest-OLSA) and subjective questionnaires. The new algorithm compresses frequencies above a pre-calculated cut off frequency and shifts them to a lower frequency range, thereby providing high-frequency ...
Feng Yanmei - - 2010
OBJECTIVES: (1) To determine whether high-frequency sensorineural hearing loss (HF SNHL) is accompanied by deterioration in temporal resolution in the low-frequency region where hearing sensitivity is within normal range. (2) To evaluate whether such temporal processing deficits contribute to speech perception difficulty in noise. DESIGN: A between-group design was employed, ...
Wilson Richard H - - 2010
BACKGROUND: The most common complaint of adults with hearing loss is understanding speech in noise. One class of masker that may be particularly useful in the assessment of speech-in-noise abilities is interrupted noise. Interrupted noise usually is a continuous noise that has been multiplied by a square wave that produces ...
Osei-Lah Victor - - 2010
It is a common misconception that high frequency audiometric notches are diagnostic of noise induced hearing loss. The aim of this study was to identify the prevalence of high frequency notch (HFN) in an audiovestibular medicine outpatient clinic population at a district general hospital. One hundred and forty nine consecutive ...
Farzanegan Gholamreza - - 2010
OBJECTIVE: It is well known that exposure to noise can lead to hearing loss. Craniotomy drills have significant noise and vibration. Since a noise induced by the drill during craniotomy is thought to be one of the causes, we examined its effect on the sensorineural hearing in this study. METHODS: ...
Kastelein Ronald A - - 2010
The underwater hearing sensitivities of two 2-year-old female harbor seals were quantified in a pool built for acoustic research by using a behavioral psycho-acoustic technique. The animals were trained only to respond when they detected an acoustic signal ("go/no-go" response). Detection thresholds were obtained for pure tone signals (frequencies: 0.2-40 ...
Munjal Sanjay Kumar - - 2010
Hearing impairment can be one of the more subtle deficits seen after closed head injury (CHI), and it may not be diagnosed until late in the recovery phase if at all. Most studies have assessed patients immediately after CHI. Repeated assessments at regular intervals were not performed in the majority ...
Perkins Rodney - - 2010
The hypothesis is tested that an open-canal hearing device, with a microphone in the ear canal, can be designed to provide amplification over a wide bandwidth and without acoustic feedback. In the design under consideration, a transducer consisting of a thin silicone platform with an embedded magnet is placed directly ...
Grindal Tyler C - - 2010
OBJECTIVES/HYPOTHESIS: Iatrogenic semicircular canal (SC) transection during mastoidectomy for chronic otitis media often leads to profound hearing loss. AM-111, an apoptosis inhibitor, has been shown to mitigate hearing loss resulting from a variety of inner ear injuries. The goal of this study was to determine if round window application of ...
Ozdek Ali - - 2010
The objective of this study is to compare pure tone audiometry and auditory steady-state response (ASSR) thresholds in normal hearing (NH) subjects and subjects with hearing loss. This study involved 23 NH adults and 38 adults with hearing loss (HI). After detection of behavioral thresholds (BHT) with pure tone audiometry, ...
Karimi Ali - - 2010
Hearing sense is one of the key elements which may have impact on the driver's task quality. This cross-sectional study investigates the hearing status of 500 truck drivers by pure tone audiometry (AC) in one of the cities in Fars province, Iran. Hearing threshold levels of the subjects were measured ...
Takeda Taizo - - 2010
Evoked oto-acoustic emission (EOAE), in particular the slow component, is fragile with the inner ear lesions and is apt to disappear in impaired ears. This presence is thought to mean that inner ear is not badly damaged, and that the presence of EOAEs in early stage sudden deafness carries a ...
Sanches Seisse Gabriela Gandolfi - - 2010
Our aim was to analyze the influence of subtle cochlear damage on temporal auditory resolution in tinnitus patients. Forty-eight subjects (hearing threshold <or=25 dB HL) were assigned to one of two experimental groups: 28 without auditory complaints (mean age, 28.8 years) and 20 with tinnitus (mean age, 33.5 years). We ...
Corona-Strauss Farah I FI Center for Research in Communication Disorders at the Saarland University Hospital, Homburg/Saar, Germany. - - 2010
Auditory Brainstem Responses (ABRs) are used as objective method for diagnostics and quantification of hearing loss. Many methods for automatic recognition of ABRs have been developed, but none of them include the individual measurement setup in the analysis. The purpose of this work was to design a fast recognition scheme ...
Martines Francesco - - 2010
Objective. 312 tinnitus sufferers were studied in order to analyze: the clinical characteristics of tinnitus; the presence of tinnitus-age correlation and tinnitus-hearing loss correlation; the impact of tinnitus on subjects' life and where possible the etiological/predisposing factors of tinnitus. Results. There is a slight predominance of males. The highest percentage ...
Hatzopoulos Stavros - - 2010
BACKGROUND: The aim of the study was to compare the estimation of hearing threshold values by behavioral and electrophysiological (ASSR) methods in subjects with normal hearing and those with sensorineural hearing impairment. MATERIAL/METHODS: Thirty-two subjects (17 male and 15 female) were tested, with a total of 61 ears. Of these, ...
Mann David - - 2010
The causes of dolphin and whale stranding can often be difficult to determine. Because toothed whales rely on echolocation for orientation and feeding, hearing deficits could lead to stranding. We report on the results of auditory evoked potential measurements from eight species of odontocete cetaceans that were found stranded or ...
Ramcharitar John U - - 2010
Pharmaceutical agents known to be toxic to the human auditory system also impair sensory hair cells of teleosts, and this supports the use of fish models for the screening of such compounds. However, previous investigations have focused almost exclusively on anatomical changes after drug administration without assessing macro-level physiological effects. ...
Chang Shu-Ju - - 2009
We assessed the exposure levels of noise, estimated prevalence, and identify risk factors of noise-induced hearing loss (NIHL) among male workers with a cross-sectional study in a liquefied petroleum gas cylinder infusion factory in Taipei City. Male in-field workers exposed to noise and administrative controls were enrolled in 2006 and ...
Shim Hyun Joon - - 2009
To compare tinnitus patients who have normal hearing between 250 Hz and 8 kHz with normal controls with regard to the ability of each group to hear extended high-frequency pure tone thresholds. We enrolled 18 tinnitus patients, each of whom had a threshold of HL <25 dB and threshold differences ...
Casper B M - - 2009
Field measurements of hearing thresholds were obtained from the Atlantic sharpnose shark Rhizoprionodon terraenovae using the auditory evoked potential method (AEP). The fish had most sensitive hearing at 20 Hz, the lowest frequency tested, with decreasing sensitivity at higher frequencies. Hearing thresholds were lower than AEP thresholds previously measured for ...
Wu Yu-Hsiang - - 2009
The directional microphone systems of modern digital hearing aids are capable of changing their spatial directivity pattern and/or the microphone mode in response to changes in the properties of environmental sounds. These adaptive/automatic features make measurement of a hearing aid's directivity in a given test environment very difficult. Assessing the ...
Helbig Silke - - 2010
BACKGROUND/AIMS: Subjects with sufficient residual low-frequency hearing after cochlear implantation can benefit from electric acoustic stimulation (EAS). A combined speech processor (MED-EL DUET), which incorporates a hearing aid and a speech processor in one device, was designed especially for this group of patients. The present report evaluates the influence of ...
Moore Brian C J - - 2010
A dead region is a region in the cochlea where the inner hair cells and/or the auditory neurones are functioning very poorly, if at all. People who are being considered for a combination of a cochlear implant and a hearing aid typically have a dead region in the parts of ...
Kujawa Sharon G SG Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts 02115, USA. - - 2009
Overexposure to intense sound can cause temporary or permanent hearing loss. Postexposure recovery of threshold sensitivity has been assumed to indicate reversal of damage to delicate mechano-sensory and neural structures of the inner ear and no persistent or delayed consequences for auditory function. Here, we show, using cochlear functional assays ...
Popelka Gerald R GR Department of Otolaryngology, Stanford University, 801 Welch Road, Stanford, CA 94305-5739, USA. - - 2010
Auditory thresholds with standardized clinical procedures are obtained over a much narrower frequency range by bone conduction than by air conduction. As a result, diagnostic information for both sensorineural and conductive-mechanism function is incomplete for high frequencies. A new magnetostrictive bone-conduction transducer that has the potential for improved output in ...
Jafari Zahra - - 2009
BACKGROUND: The relation between the auditory steady-state response (ASSR) and behavioral audiometric thresholds requires further clarification in the case of adults with auditory neuropathy/auditory dys-synchrony (AN/AD). PURPOSE: The aim of this study was to compare pure-tone audiometric threshold (PTAT) and ASSR in adults with AN/AD. STUDY SAMPLE: Sixteen adult participants ...
Moore Brian C J BC Department of Experimental Psychology, University of Cambridge, Cambridge, England. - - 2009
A dead region is a region in the cochlea where the inner hair cells and/or neurons are functioning very poorly, if at all. We have shown that, for people with sensorineural hearing loss, thresholds for detecting sinusoidal amplitude modulation (AM) of a sinusoidal carrier were lower for ears with high-frequency ...
Phatak Sandeep A - - 2009
This paper presents a compact graphical method for comparing the performance of individual hearing impaired (HI) listeners with that of an average normal hearing (NH) listener on a consonant-by-consonant basis. This representation, named the consonant loss profile (CLP), characterizes the effect of a listener's hearing loss on each consonant over ...
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