Effect of ear canal pressure and age on wideband absorbance in young infants.
Objective: The study investigated the effect of ear canal pressure and age on wideband absorbance (WBA) in healthy young infants. Design: Using a cross-sectional design, WBA at 0.25 to 8 kHz was obtained from infants as the ear canal pressure was swept from +200 to −300 daPa.Study sample: The partic...
| Publicado en: | International Journal of Audiology Vol. 56; no. 5; pp. 346 - 356 |
|---|---|
| Autores principales: | , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
May2017
|
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=123514929&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 123514929 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 14992027 JW2 jtl: International Journal of Audiology issn: 14992027 maglogo: Y pubinfo: dt: May2017 vid: 56 iid: 5 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 123514929 123514929 123514929 10.1080/14992027.2017.1284352 123514929 ppf: 346 ppct: 10 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Effect of ear canal pressure and age on wideband absorbance in young infants. aug: au: Aithal, Sreedevi Aithal, Venkatesh Kei, Joseph affil: Department of Audiology, The Townsville Hospital, Queensland, Australia sug: subj: Ear Canal In Infancy and Childhood Pressure In Infancy and Childhood Acoustic Impedance Tests In Infancy and Childhood Ear, Middle In Infancy and Childhood Human Infant Age Factors Infant, Newborn Queensland Cross Sectional Studies Infant Development Male Female Sex Factors Analysis of Variance Repeated Measures Two-Way Analysis of Variance Funding Source Infant: 1-23 months Infant, Newborn: birth-1 month Male Female ab: Objective: The study investigated the effect of ear canal pressure and age on wideband absorbance (WBA) in healthy young infants. Design: Using a cross-sectional design, WBA at 0.25 to 8 kHz was obtained from infants as the ear canal pressure was swept from +200 to −300 daPa.Study sample: The participants included 29 newborns, 9 infants each at 1 and 4 months and 11 infants at 6 months of age who passed distortion product otoacoustic emissions test.Results: In general, negative-ear canal pressures reduced WBA across the frequency range, while positive-ear canal pressures resulted in reduced WBA from 0.25 to 2 kHz and above 4 kHz with an increase in absorbance between 2 and 3 kHz compared to WBA at ambient pressure. The variation in WBA below 0.5 kHz, as the pressure was varied, was the greatest in newborns. But, the variation was progressively reduced in older infants up to the age of 6 months, suggesting stiffening of the ear canal with age.Conclusions: Significant changes in WBA were observed as a function of pressure and age. In particular, developmental effects on WBA were evident during the first six months of life. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|