Abstract:
OBJECTIVES:Little is known about the maturational changes in the mechanical properties of the skull and how they might contribute to infant-adult differences in bone conduction hearing sensitivity. The objective of this study was to investigate the mechanical impedance of the skin-covered skull for different skull positions and contact forces for groups of infants, young children, and adults. These findings provide a better understanding of how changes in mechanical impedance might contribute to developmental changes in bone conduction hearing, and might provide insight into how fitting and output verification protocols for bone-anchored hearing systems (BAHS) could be adapted for infants and young children. DESIGN:Seventy-seven individuals participated in the study, including 63 infants and children (ages 1 month to 7 years) and 11 adults. Mechanical impedance magnitude for the forehead and temporal bone was collected for contact forces of 2, 4, and 5.4 N using an impedance head, a BAHS transducer, and a specially designed holding device. Mechanical impedance magnitude was determined across frequency using a stepped sine sweep from 100 to 10,000 Hz, and divided into low- and high-frequency sets for analysis. RESULTS:Mechanical impedance magnitude was lowest for the youngest infants and increased throughout maturation in the low frequencies. For high frequencies, the youngest infants had the highest impedance, but only for a temporal bone placement. Impedance increased with increasing contact force for low frequencies for each age group and for both skull positions. The effect of placement was significant for high frequencies for each contact force and for each age group, except for the youngest infants. CONCLUSIONS:Our findings show that mechanical impedance properties change systematically up to 7 years old. The significant age-related differences in mechanical impedance suggest that infant-adult differences in bone conduction thresholds may be related, at least in part, to properties of the immature skull and overlying skin and tissues. These results have important implications for fitting the soft band BAHS on infants and young children. For example, verification of output force form a BAHS on a coupler designed with adult values may not be appropriate for infants. This may also hold true for transducer calibration when assessing bone conduction hearing thresholds in infants for different skull locations. The results have two additional clinical implications for fitting soft band BAHSs. First, parents should be counseled to maintain sufficient and consistent tightness so that the output from the BAHS does not change as the child moves around during everyday activities. Second, placement of a BAHS on the forehead versus the temporal bone results in changes in mechanical impedance which may contribute to a decrease in signal level at the cochlea as it has been previously demonstrated that bone conduction thresholds are poorer at the forehead compared with a temporal placement.
journal_name
Ear Hearjournal_title
Ear and hearingauthors
Mackey AR,Hodgetts WE,Scott D,Small SAdoi
10.1097/AUD.0000000000000272subject
Has Abstractpub_date
2016-07-01 00:00:00pages
e210-23issue
4eissn
0196-0202issn
1538-4667journal_volume
37pub_type
杂志文章相关文献
EAR AND HEARING文献大全abstract:OBJECTIVES:Audiologists regularly use serial monitoring to evaluate changes in a patient's auditory function over time. Observed changes are compared with reference standards to determine whether further clinical action is necessary. Reference standards are established in a control sample of otherwise healthy subjects ...
journal_title:Ear and hearing
pub_type: 临床试验,杂志文章
doi:10.1097/AUD.0b013e31828a21b3
更新日期:2013-09-01 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::The use of FM systems as primary amplification for children with severe and profound hearing loss is discussed. The FM advantage for improving speech perception and for reducing the detrimental effects of distance, noise, and reverberation is described. Both hypothetical and actual cases are used to demonstrate the FM...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-199204000-00006
更新日期:1992-04-01 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:INTRODUCTION:Cochlear implantation (CI) in subjects with unilateral profound sensorineural hearing loss was investigated. The authors of the present study demonstrated the binaural auditory outcomes in a 12- and 36-month prospective cohort outcome study. The present study aimed to do a long-term (LT) evaluation of the ...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000359
更新日期:2017-01-01 00:00:00
abstract:OBJECTIVES:Watching a talker's mouth is beneficial for speech reception (SR) in many communication settings, especially in noise and when hearing is impaired. Measures for audiovisual (AV) SR can be valuable in the framework of diagnosing or treating hearing disorders. This study addresses the lack of standardized meth...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000502
更新日期:2018-05-01 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
abstract:OBJECTIVES:The most commonly employed speech processing strategies in cochlear implants (CIs) only extract and encode amplitude modulation (AM) in a limited number of frequency channels. proposed a novel speech processing strategy that encodes both frequency modulation (FM) and AM to improve CI performance. Using behav...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000756
更新日期:2020-03-01 00:00:00
abstract:OBJECTIVE:The aim of the present experiment was to assess the consequences of cochlear implantation at different ages on the development of the human central auditory system. DESIGN:Our measure of the maturity of central auditory pathways was the latency of the P1 cortical auditory evoked potential. Because P1 latenci...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-200212000-00004
更新日期:2002-12-01 00:00:00
abstract:OBJECTIVES:We report on the ability of patients fit with bilateral cochlear implants (CIs) to distinguish the front-back location of sound sources both with and without head movements. At issue was (i) whether CI patients are more prone to front-back confusions than normal hearing listeners for wideband, high-frequency...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000581
更新日期:2018-11-01 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: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:OBJECTIVE:Research was conducted to assess multichannel saliency with the Ineraid cochlear prosthesis. The goal was to determine whether tonotopically ordered stimulation benefits speech reception. DESIGN:In a single high-performing subject, changes in speech reception were studied during two dramatic alterations to t...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-199510000-00002
更新日期:1995-10-01 00:00:00
abstract::Some initial experiences are described in which ear canal probe tube microphone measurements are used to determine hearing aid settings for children. Decisions are based upon ideas developed by Seewald and Ross (in Amplification for the Hearing Impaired, New York: Grune & Stratton, 1988: 213-267) and Seewald, Ross, an...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-198910000-00002
更新日期:1989-10-01 00:00:00
abstract:OBJECTIVES:The effects of directing, switching, and misdirecting auditory spatial attention in a complex listening situation were investigated in 8 younger and 8 older listeners with normal-hearing sensitivity below 4 kHz. DESIGN:In two companion experiments, a target sentence was presented from one spatial location a...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0b013e31829bf6ec
更新日期:2013-11-01 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::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:In a cross-sectional study of human immunodeficiency virus (HIV)-infected adults, the authors showed lower distortion product otoacoustic emissions (DPOAEs) in HIV+ individuals compared with controls as well as findings consistent with a central auditory processing deficit in HIV+ adults on antiretroviral th...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000276
更新日期:2016-07-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to perform a cross-language comparison of two commonly used sentence-recognition materials (i.e., Hearing in Noise Test [HINT] and AzBio) in American English (AE) and Mandarin Chinese (MC). DESIGNS:Sixty normal-hearing, native English-speaking and 60 normal-hearing, native Chinese-...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000938
更新日期:2020-08-19 00:00:00
abstract:OBJECTIVE:To investigate the middle ear dynamic characteristics in patients with otosclerosis using the sweep frequency impedance meter (SFI test) and conventional tympanometry, and also to evaluate the diagnostic efficiency of the SFI test for otosclerosis. DESIGN:The study was designed to collect a total of 25 (36 e...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-200204000-00007
更新日期:2002-04-01 00:00:00
abstract::In contrast to the transient (N1-P2) and steady-state (<20 Hz) cortical responses, neither the transient (auditory brain stem response) nor the steady-state (80 Hz) brain stem responses show the binaural masking level difference (BMLD). This study determined behavioral and 40-Hz auditory steady-state response (ASSR) B...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0b013e3181b61cc8
更新日期:2009-12-01 00:00:00
abstract::Because some unilaterally hearing-impaired children appear to experience difficulty in communication and educational progress, it seems only appropriate to reassess the identification and management strategies that are used with these children. Accordingly, this paper presents some general information on identificatio...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-198602000-00008
更新日期:1986-02-01 00:00:00
abstract::No outcome measure has universal validity and applicability. When designing, promulgating or selecting a particular instrument, audiologists should take care to consider and specify the detailed purposes to which the measure will be directed, and the particular populations to which it will be applied. Scales that have...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-200008001-00013
更新日期:2000-08-01 00:00:00
abstract:OBJECTIVES:The purpose of this study was to examine the relationship between noise exposure history, type 1 diabetes mellitus (DM), and suprathreshold measures of auditory function. DESIGN:A cross-sectional study was conducted; 20 normal-hearing participants without type 1 DM were matched on age and sex to 20 normal-h...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000457
更新日期:2017-11-01 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:OBJECTIVE:A new speech processing concept and its implementation cochlear implant neural net, simulation and stimulation (CINSTIM), for cochlear implant systems is currently under investigation. The main objectives of this new strategy are to improve speech perception within the early rehabilitation period for prelingu...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-199602000-00009
更新日期:1996-02-01 00:00:00
abstract:OBJECTIVE:This study was designed to evaluate performance stability with test-retest measures of electrical thresholds, electrical maximum acceptable loudness levels, sound-field thresholds, and audition-only speech tests. The hypothesis was that the standard error of measurement differs from one individual to another ...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/00003446-199504000-00006
更新日期:1995-04-01 00:00:00
abstract:OBJECTIVE:Inability to understand speech in noise has been cited repeatedly as the principal complaint of hearing aid users. While data exist documenting the benefit provided by hearing aids with directional microphones when listening to speech in noise, little work has been done to develop a standard clinical protocol...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/01.aud.0000121236.56217.8f
更新日期:2004-04-01 00:00:00
abstract:OBJECTIVE:The primary purpose of this study was to determine the distortion product otoacoustic emission (DPOAE) and noise response characteristics in a large sample of older adults. Another purpose was to evaluate how specific absolute DPOAE levels or DPOAE/Noise ratios differentiated hearing status in these individua...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/01.AUD.0000051847.66944.2B
更新日期:2003-02-01 00:00:00
abstract:OBJECTIVE:To evaluate the effect of artifacts on the impulse and response recordings with the video head impulse test (VHIT) and determine how many stimuli are necessary for obtaining acceptably efficient measurements. METHODS:One hundred fifty patients were examined using VHIT and their registries searched for artifa...
journal_title:Ear and hearing
pub_type: 杂志文章
doi:10.1097/AUD.0000000000000849
更新日期:2020-09-01 00:00:00