Abstract:
OBJECTIVE:To investigate the effects of number of channels and speech-to-noise ratio on connected discourse tracking (CDT) through simulations of cochlear implant speech processing. Previous studies have used citation-form vowel and consonant materials or simple sentences. CDT rates were expected to be less likely to be limited by ceiling effects and more representative of everyday speech communication. DESIGN:Four normal-hearing subjects were presented with speech processed through a real-time sine-excited vocoder having three, four, eight, or 12 channels. Amplitude envelopes extracted from each band modulated sinusoidal carrier signals placed at each band center frequency. Speech-spectrum shaped noise was added to speech before vocoder processing at three signal to noise ratios based on real-time measurements of speech level (+7, +12, +17 dB). RESULTS:CDT rates increased significantly with number of channels up to eight in both quiet and noise, and decreased significantly with each increase in noise level from quiet. CONCLUSIONS:The effects on CDT rates of the number of channels and speech-to-noise ratio are highly correlated with intelligibility measures for Hearing in Noise Test (HINT) sentences, consonants and vowels. However, HINT sentence scores even in noise show ceiling effects that obscure the advantages of processors with eight or more channels. Moderate levels of noise that have only slight effects on other measures significantly affected CDT rate. CDT rates with three or four bands of spectral information were much lower than asymptotic rates, especially in the presence of noise.
journal_name
Ear Hearjournal_title
Ear and hearingauthors
Faulkner A,Rosen S,Wilkinson Ldoi
10.1097/00003446-200110000-00007subject
Has Abstractpub_date
2001-10-01 00:00:00pages
431-8issue
5eissn
0196-0202issn
1538-4667journal_volume
22pub_type
杂志文章相关文献
EAR AND HEARING文献大全abstract::Acoustic reflex threshold and magnitude were measured for normal-hearing subjects in four experiments under conditions of: (1) tight and relaxed eyelid closure; (2) eyes open and closed in light, focusing on a spot, reading, and solving a visual maze; (3) tactile stimulation; and (4) performing a mental task. Measurem...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-198207000-00007
更新日期:1982-07-01 00:00:00
abstract:OBJECTIVES:The purpose of this investigation was to determine whether a predictable relationship existed between self-reported dizziness handicap and video Head Impulse Test (vHIT) results in a large sample of patients reporting to a dizziness clinic. Secondary objectives included describing the characteristics of the ...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000047
更新日期:2014-09-01 00:00:00
abstract::Several cases illustrating potential pitfalls in neurotologic diagnosis from the viewpoint of the otologist are presented. The role of auditory brain stem response testing is specifically emphasized in cases with discordant audiologic and radiographic findings. Included are one case of a "false negative" ABR in a pati...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-198804000-00007
更新日期:1988-04-01 00:00:00
abstract:OBJECTIVE:Current Joint Committee on Infant Hearing guidelines recommend the use of transient-evoked otoacoustic emissions (TEOAEs) as a screening tool to identify hearing loss for newborns cared for in the well-baby nursery. Newborns who do not pass the TEOAE screen before leaving the hospital are typically rescreened...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0b013e31819c4000
更新日期:2009-06-01 00:00:00
abstract::The failure to include only relevant observations in the assessment of laterality has resulted in a proliferation of post hoc attempts to "correct" laterality measures influenced by "overall performance level." The inclusion of information from trials in which both ears were either correct or in error contaminates the...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-198405000-00010
更新日期:1984-05-01 00:00:00
abstract:OBJECTIVES:In bilateral cochlear implant users, electrodes mapped to the same frequency range in each ear may stimulate different places in each cochlea due to an insertion depth difference of electrode arrays. This interaural place of stimulation mismatch can lead to problems with auditory image fusion and sensitivity...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000135
更新日期:2015-05-01 00:00:00
abstract:OBJECTIVES:Temporal envelope and periodicity components (TEPC) in the speech signal have potentials to offer important cues for speech recognition especially in tonal languages. The aims of this study are: (i) to investigate the degree of contributions of TEPC to lexical tone identification in Cantonese; and (ii) to in...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0b013e31803153ac
更新日期:2007-04-01 00:00:00
abstract::The link between nonaudiological variables and outcomes measurement is explored. Hearing impairment can affect an individual's everyday communication in numerous ways. Both audiological and nonaudiological variables interact with each other to produce a unique predicament for each individual with hearing impairment. T...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-200008001-00003
更新日期:2000-08-01 00:00:00
abstract:OBJECTIVES:Here, we evaluate the risks of amplified music for disc-jockeys (DJs) working in nightclubs. DESIGN:Sound level measurements were performed within the DJ mixing booths. A questionnaire was used to obtain exposure to noise and length of time in the profession. Audiograms and tinnitus pitch matching was also ...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0b013e31819769fc
更新日期:2009-04-01 00:00:00
abstract:OBJECTIVES:To evaluate whether monothermal caloric screening can reduce the number of caloric irrigations required in the vestibular testing battery while maintaining diagnostic accuracy. DESIGN:Prospective controlled cohort study. Three hundred and ninety patients referred for vestibular testing at this tertiary refe...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000262
更新日期:2016-05-01 00:00:00
abstract::The auditory steady state potentials may be an important technique in objective audiometry. The effects of stimulus rate, intensity, and tonal frequency on these potentials were investigated using both signal averaging and on-line Fourier analysis. Stimulus presentation rates of 40 to 45/sec result in a 40 Hz sinusoid...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-198403000-00009
更新日期:1984-03-01 00:00:00
abstract::The auditory middle latency response (MLR) seems to have a relatively long developmental time course, extending through the first decade of life. Characteristics of each MLR component change developmentally not only with respect to waveform morphology but also with respect to response reliability, dependence on awaren...
journal_title:Ear and hearing
pub_type: 杂志文章,评审
doi:10.1097/00003446-199610000-00008
更新日期:1996-10-01 00:00:00
abstract:OBJECTIVES:To estimate the annual cost of Ménière's disease and the cost per person in the UK population and to investigate the direct and indirect costs of the condition. DESIGN:The authors utilized a multidata approach to provide the first estimate of the cost of Ménière's. Data from the UK Biobank (a study of 500,0...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000264
更新日期:2016-05-01 00:00:00
abstract:OBJECTIVES:The purpose of this study was to analyze distortion product otoacoustic emission (DPOAE) level and signal to noise ratio in a group of infants from birth to 4 months of age to optimize prediction of hearing status. DPOAEs from infants with normal hearing (NH) and hearing loss (HL) were used to predict the pr...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000562
更新日期:2018-11-01 00:00:00
abstract:OBJECTIVES:New tinnitus therapies are being developed and marketed that target the patient's tinnitus frequency. This frequency is estimated clinically by pitch matching, which has the patient identify the pure tone that is closest to the perceived tinnitus frequency. Though widely used, pitch matching is heavily criti...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000081
更新日期:2014-11-01 00:00:00
abstract:OBJECTIVES:The goal of this study was to evaluate how digital noise reduction (DNR) impacts listening effort and judgment of sound clarity in children with normal hearing. It was hypothesized that when two DNR algorithms differing in signal-to-noise ratio (SNR) output are compared, the algorithm that provides the great...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/01.aud.0000440715.85844.b8
更新日期:2014-03-01 00:00:00
abstract::Many people with difficulties following conversations in noisy settings have "clinically normal" audiograms, that is, tone thresholds better than 20 dB HL from 0.1 to 8 kHz. This review summarizes the possible causes of such difficulties, and examines established as well as promising new psychoacoustic and electrophys...
journal_title:Ear and hearing
pub_type: 杂志文章,评审
doi:10.1097/AUD.0000000000000388
更新日期:2017-03-01 00:00:00
abstract::In recent years there has been an increased acceptance of the cochlear implant as an appropriate sensory aid for selected hearing-impaired individuals with profound losses. With the Food and Drug Administration's release of the 3M/House single channel cochlear implant on November 29, 1984 and the Nucleus 22-channel co...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-198604000-00003
更新日期:1986-04-01 00:00:00
abstract::The preference for hearing aid frequency-gain responses selected using the modified simplex procedure over that prescribed by NAL-R is not universal. A screening protocol used before individualized fitting may help streamline its use and ensure effective use of clinical time. In this protocol, listeners compare the pr...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-199402000-00007
更新日期:1994-02-01 00:00:00
abstract:OBJECTIVES:Conventional assessments of outcomes in deaf children with cochlear implants (CIs) have focused primarily on endpoint or product measures of speech and language. Little attention has been devoted to understanding the basic underlying core neurocognitive factors involved in the development and processing of s...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0b013e3181ffd58e
更新日期:2011-02-01 00:00:00
abstract:OBJECTIVES:The aim of the study was to investigate the link between temporal fine structure (TFS) processing, pitch, and speech perception performance in adult cochlear implant (CI) recipients, including bimodal listeners who may benefit better low-frequency (LF) temporal coding in the contralateral ear. DESIGN:The st...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000525
更新日期:2018-07-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to compare binaural performance of auditory localization task and speech perception in babble measure between children who use a cochlear implant (CI) in one ear and a hearing aid (HA) in the other (bimodal fitting) and those who use bilateral CIs. DESIGN:Thirteen children (mean ag...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000401
更新日期:2017-07-01 00:00:00
abstract::Everyday conversation frequently includes challenges to the clarity of the acoustic speech signal, including hearing impairment, background noise, and foreign accents. Although an obvious problem is the increased risk of making word identification errors, extracting meaning from a degraded acoustic signal is also cogn...
journal_title:Ear and hearing
pub_type: 杂志文章,评审
doi:10.1097/AUD.0000000000000494
更新日期:2018-03-01 00:00:00
abstract::The objective of this study was regarding sensory and cognitive interactions in older adults published since 2009, the approximate date of the most recent reviews on this topic. After an electronic database search of articles published in English since 2009 on measures of hearing and cognition or vision and cognition ...
journal_title:Ear and hearing
pub_type: 杂志文章,评审
doi:10.1097/AUD.0000000000000303
更新日期:2016-07-01 00:00:00
abstract:OBJECTIVE:The aim of the present study was to examine audiovisual speech integration in cochlear-implanted children and in normally hearing children exposed to degraded auditory stimuli. Previous studies have shown that speech perception in cochlear-implanted users is biased toward the visual modality when audition and...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0b013e3182670993
更新日期:2013-01-01 00:00:00
abstract::This paper describes the first phase in the development of the Connected Speech Test (CST). This test of intelligibility of everyday speech has been developed primarily for use as a criterion measure in investigations of hearing aid benefit. The test consists of 48 passages of conversationally produced connected speec...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-198710001-00010
更新日期:1987-10-01 00:00:00
abstract:OBJECTIVE:Evaluating the effect of anxiety and depression on clinical measures of general health, tinnitus-specific quality of life, and coping abilities. DESIGN:Two hundred sixty-five chronic, subjective tinnitus sufferers were divided into four psychological symptom groups according to cut-off scores on anxiety and ...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0b013e3181888f83
更新日期:2008-12-01 00:00:00
abstract:OBJECTIVES:Loudness-balance measurements with monaurally impaired subjects have shown that the shape of the loudness versus sound-pressure curve among hearing-impaired persons varies significantly. But the effectiveness of adjusting the compression characteristics of wide-dynamic-range compression hearing aids-the comp...
journal_title:Ear and hearing
pub_type: 临床试验,杂志文章
doi:10.1097/AUD.0b013e318177d9c6
更新日期:2008-10-01 00:00:00
abstract::Hearing conservation programs (HCPs) mandated by the US Occupational Safety and Health Administration (OSHA) cost about $350/worker/year. Are they cost-effective? A cross-sectional model of the US adult population with and without HCPs incorporates (1) the American Medical Association's method for estimating binaural ...
journal_title:Ear and hearing
pub_type: 社论
doi:10.1097/AUD.0000000000000523
更新日期:2018-07-01 00:00:00
abstract::Botulism poisoning results in a presynaptic failure of neuromuscular transmission, and may be expected to impair Eustachian tube and stapedius reflex function. The audiologic findings in five normal-hearing patients with type A botulism poisoning are presented. Results were varied. Two patients demonstrated type B or ...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-199108000-00007
更新日期:1991-08-01 00:00:00