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Results 201 - 250 of 1320
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Jürgens Tim - - 2009
Contrary to listeners with normal hearing, listeners with high-frequency sensorineural hearing loss suffer especially from a poor consonant recognition. This is mainly attributed to the loss of audibility within high-frequency regions. In a former study [Jurgens and Brand, J. Acoust. Soc. Am. (submitted)] it was shown that consonant recognition rates ...
Mulsow Jason - - 2009
A number of studies with odontocete cetaceans have demonstrated that hearing sensitivity measurements using electrophysiological auditory steady-state responses (ASSRs) can provide an efficient means of estimating a subject's behavioral audiogram. Expansion of ASSR methods to another marine mammal group, the otariid pinnipeds (sea lions and fur seals), holds the potential ...
Halpin Chris - - 2009
The pure tone audiogram is an accurate measure of auditory threshold as a function of stimulus frequency. However, it does not provide the complete picture in patients with sensorineural hearing loss (SNHL) because it is not a direct measure of damage to the cochlear epithelium or of the associated limits ...
Shahnaz Navid - - 2009
OBJECTIVE: The major goal of this study was to examine differences in the middle ear mechano-acoustical properties of normal ears and ears with surgically confirmed otosclerosis using conventional and multifrequency tympanometry (MFT) as well as energy reflectance (ER). Second, we sought to compare ER, standard tympanometry, and MFT in their ...
Wang DeLiang - - 2009
Ideal binary time-frequency masking is a signal separation technique that retains mixture energy in time-frequency units where local signal-to-noise ratio exceeds a certain threshold and rejects mixture energy in other time-frequency units. Two experiments were designed to assess the effects of ideal binary masking on speech intelligibility of both normal-hearing ...
Desloge Joseph G - - 2009
The current study examined the effects of audibility and age on the release of masking for speech in interrupted versus steady-state noise in listeners with real and simulated hearing loss. The absolute thresholds of each of ten hearing-impaired listeners were simulated in normal-hearing listeners through a combination of spectrally shaped ...
Desloge Joseph G - - 2009
Temporal modulation transfer functions (TMTFs) were obtained in nine listeners with moderate to profound sensorineural hearing loss (age range of 21 to 69 years). The hearing loss of each impaired listener was simulated in a group of three age-matched normal-hearing listeners through a combination of spectrally-shaped masking noise and multi-band ...
Murphy William - - 2009
In 2009, the United States Environmental Protection Agency will propose a revision to the federal regulation for the labeling of hearing protection devices, 40 CFR 211 Subpart B. One of the new features of the proposed rule was the measurement of an impulse noise reduction rating for hearing protection devices. ...
Li Feipeng - - 2009
This research investigates the impact of sensorineural hearing loss on consonant identification. Two elderly subjects, AS with a moderate to severe sloping hearing loss and DC with a severe sloping high-frequency hearing loss, volunteered for the pilot study. Speech perception test reveals that AS has no problem with ta, and ...
Cheng Wei-De - - 2009
This study is to discuss the sensitivity of human hearing sounds at different depths of ear canal, and to construct the measurement scales which can be the reference for the sound measurement and research in the future. Eighteen subjects aged from 20 to 30 years old with normal hearing and ...
Demeester Kelly - - 2009
The aim of this study was to describe the prevalence of specific audiogram configurations in a healthy, otologically screened population between 55 and 65 years old. The audiograms of 1147 subjects (549 males and 598 females between 55 and 65 years old) were collected through population registries and classified according ...
Lentz Jennifer - - 2009
Noises that are modulated with either an exponentially rising (ramped), repeating modulator or a falling (damped), repeating modulator may evoke strong perceptual differences. To explore a possible cochlear contribution to these perceptual differences, masking period patterns (MPPs) of ramped and damped noises were measured for normal-hearing listeners at different stimulus ...
Sabin Andrew T - - 2009
Individuals with hearing loss are poorer than normal-hearing listeners at detecting patterns of peaks and valleys of sound level spread across audio frequency (spectral modulation detection)-an important skill for speech and music perception. In this preliminary report we examined whether listeners with hearing loss could improve on spectral modulation detection ...
Leek Marjorie R - - 2009
Previous work has demonstrated that iterated rippled noise (IRN) produces a weaker pitch in hearing-impaired (HI) listeners than in normal-hearing (NH) subjects (e.g., Leek and Summers, 2001). In this study, the hypothesis was tested that the weaker pitch is a result of an increased perceptual noisiness of IRN for HI ...
Dobie Robert A - - 2009
Most hearing loss in American adults is attributable to aging, noise, or a combination of these two. While most claims for noise-induced hearing loss are handled administratively in workers compensation, litigation against employers, premises owners, and manufacturers of noisy equipment continues to pose interesting challenges. Issues of negligence often involve ...
Arehart Kathryn H - - 2009
Noise, distortion, nonlinear signal-processing algorithms, and linear filtering can all affect the sound quality of a hearing aid or other audio device. Most hearing-aid research concentrates on speech, but music reproduction can also be an important factor in user satisfaction. In this presentation, quality judgments are made for several different ...
Desherlia Andrew D - - 2009
It has been shown that operators of motorcycles are exposed to dangerous levels of wind noise at high speeds [McCombe et al., J. Laryngol. Otol. 109, 599-604 (1995)]. Many governmental regulatory bodies have developed restrictions that ban the use of earplugs while operating a motorcycle, due to their obstruction of ...
Reed Charlotte M - - 2009
Gap-detection thresholds were measured in listeners with real and simulated hearing loss under conditions of auditory or tactile presentation. The audiometric thresholds of each of ten listeners with sensorineural hearing loss (21-69 years of age) were simulated in groups of age-matched normal-hearing listeners through a combination of spectrally shaped masking ...
Nelson Peggy - - 2009
Listeners with sensorineural hearing loss (SNHL) do not experience masking release for speech in fluctuating noise, as normal-hearing listeners do. One hypothesis suggests dip listening may be difficult because frequency glides, or speech formant transitions, may be difficult to discriminate at low sensation levels when in the presence of fluctuating ...
Sabin Andrew T - - 2009
While approaches that modify the frequency response of a hearing aid based on a listener's subjective preference have demonstrated some success, they also have several limitations. Namely, these approaches (1) consider a small set of potential frequency-gain curves (FGCs) and (2) they converge on the final FGC, which makes the ...
Hornsby Benjamin W Y BW Department of Hearing and Speech Science, Vanderbilt Bill Wilkerson Center, Vanderbilt University School of Medicine, Nashville, TN 37232-8242, USA. - - 2009
Recent work using the Threshold Equalizing Noise (TEN) test as a gold standard suggests that the presence of cochlear dead regions in persons with moderate-to-severe hearing loss may be quite common. In addition, previous data suggest that certain characteristics of hearing loss, such as severe-profound high-frequency hearing loss or steeply ...
Wilson Richard H - - 2009
BACKGROUND: This is a case study of an 18-year-old female who suffered a bilateral idiopathic sensorineural hearing loss that was coincident with the removal of four impacted wisdom teeth, Throughout childhood the patient had normal hearing for pure tones bilaterally as measured at the pediatrician's office. One month prior to ...
Krishnamurti Sridhar - - 2009
Noise-induced permanent threshold shifts (NIPTS) were computed from retrospective audiometric analyses by subtracting aging effects on hearing sensitivity in sixty-eight patients with bilateral sensorineural hearing loss who reported significant occupational noise exposure histories. There were significant effects of age on NIPTS but no significant gender- or ear- differences in terms ...
Job A - - 2009
INTRODUCTION: Distortion product otoacoustic emissions (DPOAEs) are known to represent the contractile amplifier function of cochlear outer hair cells. It is known that low or absent DPOAEs are associated with hearing loss on audiograms. However, low DPOAEs can also be found associated with normal audiograms. It is unknown whether low ...
May Bradford J - - 2009
The domestic cat is the primary physiological model of loudness coding and recruitment. At present, there are no published descriptions of loudness perception in this species. This study used a reaction time task to characterize loudness perception in six behaviorally trained cats. The psychophysical approach was based on the assumption ...
Bruck Dorothy - - 2009
OBJECTIVES: People who are hard-of-hearing may rely on auditory, visual, or tactile alarms in a fire emergency, and US standards require strobe lights in hotel bedrooms to provide emergency notification for people with hearing loss. This is the first study to compare the waking effectiveness of a variety of auditory ...
Beltrame Achille M - - 2009
OBJECTIVE: To assess the functional results of the Vibrant Soundbridge (VBS) placed on the round window (RW) in patients with mixed hearing loss. STUDY DESIGN: Retrospective evaluation of functional hearing, with measurements performed 7 to 9 months postoperatively. SETTINGS: Two tertiary referral hospital centers. SUBJECTS: Twelve individuals with mixed severe ...
Paini Michele C - - 2009
OBJECTIVE: The aim of this study was to examine the noise exposure and hearing of fishermen from small-scale fisheries from the state of Paraná in Brazil. DESIGN: Participants of this cross-sectional study included 141 male fishermen, ages ranging from 18 to 77 yr old and 136 controls matched by socioeconomic ...
Kastelein Ronald A - - 2009
The underwater hearing sensitivities of two 1-year-old female harbor seals were quantified in a pool built for acoustic research, using a behavioral psychoacoustic technique. The animals were trained to respond when they detected an acoustic signal and not to respond when they did not (go/no-go response). Pure tones (0.125-0.25 kHz) ...
Girard S A - - 2009
OBJECTIVES: Our main purpose was to investigate any relationship between noise exposure levels in the workplace, degree of hearing loss (HL), and the relative risk of accident (OR of single or multiple events). METHODS: We conducted a retrospective study of 52 982 male workers aged 16-64 years with long-standing exposures ...
Mrena Roderik - - 2009
The objective of this study was to investigate the effect of tightened hearing protection regulations on tinnitus in the Finnish Defence Forces. The initial study group comprised 252 officers and non-commissioned officers (NCOs), of which 229 were included in the final study group. Subjective symptoms of tinnitus and audiometric test ...
Gantz Bruce J BJ Department of Otolaryngology - Head and Neck Surgery, Iowa Cochlear Implant Clinical Research Center, University of Iowa, Iowa City, Iowa 52242-1078, USA. - - 2009
Acoustic plus electric (electric-acoustic) speech processing has been successful in highlighting the important role of articulation information in consonant recognition in those adults that have profound high-frequency hearing loss at frequencies greater than 1500 Hz and less than 60% discrimination scores. Eighty-seven subjects were enrolled in an adult Hybrid multicenter ...
Verbeek Jos H - - 2009
Millions of workers worldwide are exposed to noise levels that increase their risk of hearing impairment. Little is known about the effectiveness of hearing loss prevention interventions. To assess the effectiveness of non-pharmaceutical interventions for preventing occupational noise exposure or occupational hearing loss compared to no intervention or alternative interventions. ...
Williams Warwick - - 2009
The purpose of this work is to look at the expectations and actions that exist around the use of hearing protectors. Are our expectations for the performance of hearing protectors rational and is the way we expect them to be used reasonable? Perhaps we are expecting too much of hearing ...
Skogstad M - - 2009
In this prospective study over twelve years, we have studied 30 young professional divers. The aim of the study was to see if changes in hearing thresholds were related to cumulative diving exposure. The study started at the beginning of the divers' education to become professional divers. Over the follow-up ...
El Fata Fouad - - 2009
AIM: To compare performance on a song recognition task of bilaterally combined electric and acoustic hearing (bimodal stimulation) with electric or acoustic hearing alone. METHODS: Subjects were 14 adults with cochlear implants (CI) who continued to use a hearing aid (HA) in one/both ears. Subjects were asked to identify excerpts ...
Chun Robert H - - 2009
Syphilis is a preventable and curable multi-organ disease caused by Treponema pallidum that may also affect the inner ear. First reported in 1887 by Adam Politzer, luetic endolymphatic hydrops (LEH) is a treatable complication of syphilis which causes a potentially reversible sensorineural hearing loss. Symptoms of LEH include fluctuating hearing ...
Glista Danielle - - 2009
This study evaluated prototype multichannel nonlinear frequency compression (NFC) signal processing on listeners with high-frequency hearing loss. This signal processor applies NFC above a cut-off frequency. The participants were hearing-impaired adults (13) and children (11) with sloping, high-frequency hearing loss. Multiple outcome measures were repeated using a modified withdrawal design. ...
Bogaerts Sofie - - 2009
Auditory brainstem responses (ABRs) are used to study auditory acuity in animal-based medical research. ABRs are evoked by acoustic stimuli, and consist of an electrical signal resulting from summated activity in the auditory nerve and brainstem nuclei. ABR analysis determines the sound intensity at which a neural response first appears ...
Lorenzi Christian C Equipe Audition, LPP CNRS, Universite Paris Descartes, and DEC, Ecole Normale Superieure, Paris, France. - - 2009
The identification of nonsense syllables that were lowpass filtered at 1.5 kHz was compared for subjects with normal hearing and subjects with mild-to-severe hearing loss at high frequencies but with normal or near-normal hearing at low frequencies. Absolute thresholds were mostly within the normal range (<20 dB hearing level) for ...
Wu Chun-Ching - - 2009
This longitudinal study investigated how chronic gunshot noise exposure affects cochlear and saccular function in police officers who engaged in regular target shooting practice using dual protection (ear plugs plus earmuffs) for >10 years. In 1997, 20 male police officers underwent audiometry before and two weeks after shooting. Twelve of ...
Corona-Strauss Farah I FI Center for Research in Communication Disorders at the Saarland University Hospital, Homburg/Saar, Germany. - - 2009
Chirp-evoked auditory brainstem responses (ABRs) have shown a better performance compared to click-evoked ABRs, due to their temporal organization which compensates for the traveling wave delay achieving a synchronous discharge of the cochlea. In this paper we present the development and evaluation, in healthy subjects, of a series of notched ...
Botelho Carla Tomaz - - 2009
Exposure to ototoxic chemical products in the presence or absence of noise can cause irreversible injury to the hearing of workers for a significantly short period of exposure period. AIM: to perform a comparative study, through audiometric tests, in workers exposed to noise only and noise associated with chemical products. ...
Prestes Raquel - - 2009
Our objective was to compare quality of life, high-frequency audiometry, and loudness-pitch match in individuals with tinnitus with and without hearing loss. We divided 52 individuals into two groups: one with hearing impairment (HI; n = 24) and the other with no hearing loss (NL; n = 28). All participants ...
Moore Brian C J BC Department of Experimental Psychology, University of Cambridge, Cambridge, England. - - 2008
It is possible for auditory prostheses to provide amplification for frequencies above 6 kHz. However, most current hearing-aid fitting procedures do not give recommended gains for such high frequencies. This study was intended to provide information that could be useful in quantifying appropriate high-frequency gains, and in establishing the population ...
Howard Daniel R - - 2008
The prairie mole cricket (Gryllotalpa major Saussure) is a rare orthopteran insect of the tallgrass prairie ecosystem of the south central USA. Populations are known to currently occupy fragmented prairie sites in Oklahoma, Arkansas, Kansas and Missouri, including The Nature Conservancy's Tallgrass Prairie Preserve in north central Oklahoma. Prairie mole ...
Oxenham Andrew J AJ University of Minnesota, Minneapolis, MN 55455, USA. - - 2008
Pitch is important for speech and music perception, and may also play a crucial role in our ability to segregate sounds that arrive from different sources. This article reviews some basic aspects of pitch coding in the normal auditory system and explores the implications for pitch perception in people with ...
Alexander Joshua M JM University of Wisconsin, Madison, USA. - - 2009
To evaluate how perceptual importance of spectral tilt is altered when formant information is degraded by sensorineural hearing loss. Eighteen listeners with mild to moderate hearing impairment (HI listeners) and 20-23 listeners with normal hearing (NH listeners) identified synthesized stimuli that varied in second formant (F(2)) frequency and spectral tilt. ...
Mendel Lisa Lucks - - 2008
BACKGROUND: Successful communication is necessary in health-care environments. Yet the presence of noise in hospitals, operating rooms, and dental offices may have a deleterious effect on health-care personnel and patients understanding messages accurately. The presence of a surgical mask and hearing loss may further affect speech perception. PURPOSE: To evaluate ...
Nachtigall Paul - - 2008
The use of auditory evoked potential (AEP) measurements for examining the hearing of marine mammals was accelerated by the need to rapidly test hearing following sound exposures during temporary threshold shift experiments. AEP measures have allowed quick measurements of hearing following intense noise exposures of sounds ranging from filtered white ...
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