Abstract:
:Auditory brain stem response waveforms, derived from normal ears, were analyzed with a computer-based digital filtering program as a means of systematically evaluating the effects of phase-shift distortion. Off-line analysis involved the stimulated responses of a Butterworth-type filter at five high-pass and four low-pass frequencies, three filter slopes, and standard versus zero phase-shifting. Phase-shift, as seen with analog filters, proved to be a major cause of waveform distortion including significant latency and amplitude changes. A discussion on the need and use of digital filtering as well as suggested analog filter parameter settings is included.
journal_name
Ear Hearjournal_title
Ear and hearingauthors
Domico WD,Kavanagh KTdoi
10.1097/00003446-198612000-00006subject
Has Abstractpub_date
1986-12-01 00:00:00pages
377-82issue
6eissn
0196-0202issn
1538-4667journal_volume
7pub_type
杂志文章相关文献
EAR AND HEARING文献大全abstract:OBJECTIVE:The purpose of the current study was to examine how age-related hearing impairment affects lipreading and auditory-visual integration. The working hypothesis for the investigation was that presbycusic hearing loss would increase reliance on visual speech information, resulting in better lipreading and auditor...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0b013e31812f7185
更新日期:2007-09-01 00:00:00
abstract::The ability of aural acoustic immittance measures and validated pneumatic otoscopy to identify middle ear effusion (MEE) was determined for a group of children with chronic or recurrent otitis media. The measures were made immediately prior to surgery for placement of tympanostomy tubes, with the validating diagnosis ...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-199408000-00005
更新日期:1994-08-01 00:00:00
abstract:OBJECTIVE:With broadening candidacy criteria for cochlear implantation, a greater number of pediatric candidates have usable residual hearing in their nonimplanted ears. This population potentially stands to benefit from continued use of conventional amplification in their nonimplanted ears. The purposes of this invest...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-200508001-00010
更新日期:2005-08-01 00:00:00
abstract:OBJECTIVES:At a minimum, unilateral hearing loss (UHL) impairs sound localization ability and understanding speech in noisy environments, particularly if the loss is severe to profound. Accompanying the numerous negative consequences of UHL is considerable unexplained individual variability in the magnitude of its effe...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000380
更新日期:2017-03-01 00:00:00
abstract:OBJECTIVE:The main objective was to investigate whether the broadening and narrowing of formant bandwidths had a significant effect on the identification of vowels often confused by Nucleus cochlear implant recipients using the Spectral Peak (SPEAK) speech coding strategy. Specifically, identification performance for s...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-199712000-00006
更新日期:1997-12-01 00:00:00
abstract:OBJECTIVE:The objective of this study was to evaluate streamlined programming procedures for the Nucleus cochlear implant system with the Contour electrode array. DESIGN:Phase 1 involved an examination of the clinical MAPs for the first 103 recipients implanted with the Contour electrode array in the Melbourne Cochlea...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/01.aud.0000188201.86799.01
更新日期:2005-12-01 00:00:00
abstract:OBJECTIVE:The objectives of this study were to characterize the effects of presentation level on speech recognition in quiet by cochlear implant users with the Nucleus 22 SPEAK and Clarion v1.2 CIS speech-processing strategies, and to relate speech recognition at low presentation levels to stimulus audibility as measur...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/01.AUD.0000090340.09847.39
更新日期:2003-10-01 00:00:00
abstract:OBJECTIVES:The purpose of this study was to describe normal characteristics of distortion product otoacoustic emission (DPOAE) signal and noise level in a group of newborns and infants with normal hearing followed longitudinally from birth to 15 months of age. DESIGN:This is a prospective, longitudinal study of 231 in...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000542
更新日期:2018-09-01 00:00:00
abstract::Identification errors for initial consonants of consonants-vowels-consonants-vowels from lists A and B of the Nonsense Syllable Test were analyzed for 10 normal-hearing and 8 sensorineural hearing-impaired listeners. The Nonsense Syllable Test stimuli were presented binaurally through earphones at 6 increasing sensati...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-198105000-00006
更新日期:1981-05-01 00:00:00
abstract::Ipsilateral and contralateral auditory brain stem responses were recorded from both ears of 10 neonates between 37 and 43 weeks from conception with normal auditory brain stem function. The most prominent component of the contralateral response was a forehead positive deflection occurring 0.3 millisecond before the ip...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-198507000-00001
更新日期:1985-07-01 00:00:00
abstract::In a digitally controlled adaptive filter, ongoing detection and spectral analysis of quasi steady state noise are performed, and analog filter parameters are adjusted to provide greatest attenuation in frequency regions where noise energy is greatest. Attenuation introduced by the filter affects both speech and noise...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-198802000-00012
更新日期:1988-02-01 00:00:00
abstract::A patient-wearable, single-electrode cochlear implant was first used by a patient in 1972 at the House Ear Institute. Since early 1982, a redesigned version of this system has been in clinical use. This new system, called the 3M House cochlear implant system, consists of an implanted receiver and a patient-worn signal...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:
更新日期:1985-05-01 00:00:00
abstract:OBJECTIVES:A sum of simultaneous pure tones with harmonic relationships (i.e., simple frequency ratios) is normally heard as a single sound, with a single pitch, even when its components are fully resolved in the auditory periphery. This perceptual phenomenon called "harmonic fusion" is thought to play an important rol...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000356
更新日期:2017-01-01 00:00:00
abstract:OBJECTIVES:The objectives of this study were to examine the quantity of adult words, adult-child conversational turns, and electronic media in the auditory environments of toddlers who are hard of hearing (HH) and to examine whether these factors contributed to variability in children's communication outcomes. DESIGN:...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0b013e3182a76768
更新日期:2014-03-01 00:00:00
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::Twenty-two patients with complaints of severe tinnitus received psychophysiological therapy. Biofeedback sessions were supplemented with body relaxation techniques through the use of audio cassette tapes. The experimental group was matched to a control group according to age and sex. The individuals' names in the cont...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-198612000-00009
更新日期:1986-12-01 00:00:00
abstract::A common element of the psychophysiological research on listening effort is the focus on listening demand as determinant of effort. The article discusses preceding studies and theorizing on effort to show that the link between listening demand and listening effort is moderated by various variables. Moreover, I will pr...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000295
更新日期:2016-07-01 00:00:00
abstract:OBJECTIVES:Cochlear implants (CIs) are increasingly recommended to individuals with residual bilateral acoustic hearing. Although new hearing-preserving electrode designs and surgical approaches show great promise, CI recipients are still at risk to lose acoustic hearing in the implanted ear, which could prevent the ab...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000420
更新日期:2017-09-01 00:00:00
abstract:OBJECTIVES:To measure benefit in terms of speech recognition in quiet and in noise, and conservation of residual hearing in three groups of subjects implanted with the Nucleus Straight Research Array cochlear implant. This device incorporates the Nucleus Slim Straight electrode carrier designed to be easier to insert i...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/01.aud.0000444781.15858.f1
更新日期:2014-03-01 00:00:00
abstract::This paper will provide a backdrop to the others in this section on outcomes of children with mild to moderate sensorineural hearing loss. Our objective here is to provide an overview of the research approaches used to study the outcomes of these children to provide guidance for future studies of children with mild to...
journal_title:Ear and hearing
pub_type: 杂志文章,评审
doi:10.1097/AUD.0b013e318157f093
更新日期:2007-12-01 00:00:00
abstract:OBJECTIVE:To determine how speech perception is affected for Nucleus cochlear implant users when their speech processor is programmed using neural response telemetry (NRT) measures rather than traditional behavioral estimates of threshold and maximum comfort level. DESIGN:Electrically evoked compound action potential ...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-200202001-00009
更新日期:2002-02-01 00:00:00
abstract:OBJECTIVE:To examine the prevalence of auditory neuropathy in a group of infants at risk for hearing impairment and to present an overview of the clinical findings for affected children. DESIGN:Results for 20 subjects who showed repeatable cochlear microphonic potentials in the absence of click-evoked auditory brain s...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-199906000-00006
更新日期:1999-06-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to characterize auditory function in patients diagnosed with post-treatment Lyme disease syndrome (PTLDS). DESIGN:Eighteen patients with PTLDS were evaluated and compared to a normal population. Evaluations consisted of pure tone and speech thresholds, word recognition (WRS), ac...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/01.AUD.0000100205.25774.5F
更新日期:2003-12-01 00:00:00
abstract::This article reviews research on the relatively recently discovered event-related potential component, the mismatch negativity (MMN), which is of great potential interest for understanding central auditory function and various forms of its pathology. This change-specific response can serve as an accurate objective mea...
journal_title:Ear and hearing
pub_type: 杂志文章,评审
doi:
更新日期:1995-02-01 00:00:00
abstract:OBJECTIVE:It is widely recognized by hearing aid users and audiologists that a period of auditory acclimatization and adjustment is needed for new users to become accustomed to their devices. The aim of the present study was to test the idea that auditory acclimatization and adjustment to hearing aids involves a proces...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000366
更新日期:2017-03-01 00:00:00
abstract:OBJECTIVES:To measure binaural benefit over the shadowed ear alone for young bilateral cochlear implant (CI) users. It was hypothesized that children who received bilateral CIs at a young age (<4 years), and had significant bilateral experience, would demonstrate lower detection thresholds for speech sounds in backgrou...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000442
更新日期:2017-11-01 00:00:00
abstract:OBJECTIVES:To compare the sound-source localization, discrimination, and tracking performance of bilateral cochlear implant users with omnidirectional (OMNI) and pinna-imitating (PI) microphone directionality modes. DESIGN:Twelve experienced bilateral cochlear implant users participated in the study. Their audio proce...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000912
更新日期:2020-07-16 00:00:00
abstract::The association between audiometric hearing thresholds and click-evoked otoacoustic emission (CEOAE) spectral properties was examined in 129 adult subjects with and without a noise-induced hearing loss (NIHL). Subjects were grouped according to their "beginning of hearing loss frequency" and their exposure to hazardou...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-199512000-00007
更新日期:1995-12-01 00:00:00
abstract:OBJECTIVES:In newer-generation Cochlear Ltd. cochlear implants, two adjacent electrodes can be electrically coupled to produce a single contact or "dual electrode" (DE). The goal of the present study was to evaluate whether relatively large impedance differences (>3.0 kOhms) between coupled electrodes affect the excita...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000098
更新日期:2015-03-01 00:00:00
abstract:OBJECTIVES:This study tested listeners with a cochlear implant (CI) in one ear and acoustic hearing in the other ear, to assess their ability to localize sound and to understand speech in collocated or spatially separated noise or speech maskers. DESIGN:Eight CI listeners with contralateral acoustic hearing ranging fr...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000708
更新日期:2019-11-01 00:00:00