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Acoustic Immittance Measures / Lisa L. Hunter (2013)
Titre : Acoustic Immittance Measures : Basic and Advanced Practice Type de document : Livre Auteurs : Lisa L. Hunter ; Navid Shahnaz Editeur : Plural Publishing Inc Année de publication : 2013 Collection : Core Clinical Concepts in Audiology Importance : 175 p. Format : 28 cm ISBN/ISSN/EAN : 978-1-59756-437-3 Prix : $59,95 Langues : Anglais (eng) Descripteurs : HE Vinci
Anatomie ; Audiologie pédiatrique ; Mesure acoustique ; Nourrisson ; Oreille externe ; Oreille moyenne ; Physiologie ; Réflexe stapédien ; Tests d'impédance acoustique ; Troubles de l'audition ; Tympanométrie
Autres descripteurs
Immitance acoustique ; Physique de l'audition ; Reflectance acoustique ; Reflexion a large bandeDisponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=206279 Exemplaires (1)
Cote Support Localisation Section Disponibilité L_425_5025 Livre Ixelles Mezzanine Prêt autorisé
DisponibleAutomated Adaptive Wideband Acoustic Reflex Threshold Estimation in Normal-hearing Adults / Kim S. Schairer in Ear and hearing, Vol.43, n°2 (Mars-avril 2022)
Titre : Automated Adaptive Wideband Acoustic Reflex Threshold Estimation in Normal-hearing Adults Type de document : Article Auteurs : Kim S. Schairer ; Daniel B. Putterman ; Douglas H. Keefe ; Dennis F. Fitzpatrick ; Angela C. Garinis ; Elizabeth R. Kolberg ; M. Patrick Feeney Année de publication : 2022 Article en page(s) : p. 370-378 Langues : Anglais (eng) Descripteurs : HE Vinci
Acoustique
Autres descripteurs
Immitance acoustique ; Reflexe de l'oreille moyenne ; Reflexion a large bandeRésumé : Objectives: Acoustic stapedius reflex threshold (ART) tests are included in a standard clinical acoustic immittance test battery as an objective cross-check with behavioral results and to help identify site of lesion. In traditional clinical test batteries, middle-ear admittance of a 226 Hz probe is estimated using ear-canal measurements in the presence of a reflex-activating stimulus. In the wideband (WB) acoustic immittance ART test used in this study, the pure-tone probe is replaced by a WB probe stimulus and changes in absorbed power are estimated using ear-canal measurements in the presence of the activator. The ART is defined as the lowest level at which a criterion change in admittance (clinical) or absorbed power (WB) is observed in the presence of the activator. In the present study, ARTs were obtained in adults with normal hearing using the clinical, manual method and with a new WB automated adaptive threshold detection method. It was hypothesized that the WB test would result in lower ARTs than the clinical test because reflex-related changes in power absorbance could be observed across multiple frequency bands in the WB test compared with a single frequency in the traditional test.
Design: Data were collected in a prospective research design. ARTs were obtained in ipsilateral and contralateral conditions using 500, 1000, 2000 Hz, and broadband noise (BBN) activators on a clinical system and on an experimental WB system. The bandwidth of the BBN activator was 125 to 4000 Hz on the clinical system and 200 to 8000 Hz on the wideband system. ARTs were estimated at both tympanometric peak pressure (TPP) and ambient pressure on the WB system. Data were collected in both ears of 39 adults (21 males) of mean age 47.7 years (range 23-72 years). Differences in ARTs among the three threshold estimation methods (clinical, WB at TPP, WB at ambient) were examined using the general linear model repeated measures test in SPSS. Post-hoc pairwise comparisons were completed with Bonferroni correction for multiple comparisons. Statistical significance was defined as p
Results: ARTs obtained on the WB system at TPP and ambient pressure were significantly lower than obtained on the clinical system. ARTs obtained on the WB system at TPP were significantly higher than at ambient pressure in the 500 and 2000 Hz ipsilateral conditions.
Conclusions: WB automated adaptive ARTs in normal-hearing adults were lower than for clinical methods when measured at TPP and ambient pressure. Lower presentation levels required to estimate ART in the WB test may be more tolerable to patients. Patients with ARTs that are not present at the maximum level of a traditional reflex test may have present ARTs with a WB ART test, which may reduce the need to refer for additional testing for possible retrocochlear involvement. Automation of the test may allow clinicians more time to attend to the other requisite tasks of a hearing evaluation and make the system useful for telehealth applications.Disponible en ligne : Oui En ligne : https://login.ezproxy.vinci.be/login?url=https://ovidsp.ovid.com/ovidweb.cgi?T=J [...] Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=292896
in Ear and hearing > Vol.43, n°2 (Mars-avril 2022) . - p. 370-378[article]
Titre : Effects of signal bandwidth on listening effort in young- and middle-aged adults Type de document : Article Auteurs : Jenna L. Cramer ; Jeremy J. Donai Année de publication : 2019 Article en page(s) : p. 116-122 Langues : Anglais (eng) Descripteurs : Autres descripteurs
Reflexion a large bande ; Seuil auditif de haute fréquence
HE Vinci
Effort d'écouteRésumé : The purpose of this study was to assess the effects of signal bandwidth, noise and signal predictability on listening effort among younger and middle-aged individuals with normal hearing, where YNH = young normal hearing and ONH = older normal hearing. It was of interest to determine if a reduction in high-frequency energy would differentially influence performance between the two groups. Accès : Contactez la bibliothèque d'Ixelles si le lien vers la ressource électronique ne fonctionne plus Disponible en ligne : Oui En ligne : https://login.ezproxy.vinci.be/login?url=https://www.tandfonline.com/doi/pdf/10. [...] Format de la ressource électronique : Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=250352
in International Journal of Audiology IJA > Vol. 58, n°2 (Février 2019) . - p. 116-122[article]
Titre : Improving the Differential Diagnosis of Otitis Media With Effusion Using Wideband Acoustic Immittance Type de document : Article Auteurs : Gabrielle R. Merchant ; Sarah Al-Salim ; Richard M. Tempero ; Dennis F. Fitzpatrick ; Stephen T. Neely Année de publication : 2021 Article en page(s) : p. 1183-1194 Langues : Anglais (eng) Descripteurs : Autres descripteurs
Reflexion a large bande
HE Vinci
Absorbance acoustique ; Otite moyenne ; TympanométrieRésumé : Objectives: The objective of this work is to determine whether there is a systematic effect of middle ear effusion volume on wideband acoustic immittance in children with surgically confirmed otitis media with effusion.
Design: Wideband acoustic immittance was measured in 49 ears from children (9 months to 11 years) who had a diagnosis of otitis media with effusion and compared to 14 ears from children (10 months to 10 years) without a recent history of otitis media. For children with otitis media with effusion, wideband acoustic immittance testing took place in the child's preoperative waiting room before surgical placement of tympanostomy tubes. Testing was completed in a pressurized condition (wideband tympanometry) for all ears as well as in an ambient condition in a subset of ears. Intraoperative findings regarding effusion volume were reported by the surgeons immediately before tube placement and confirmed following myringotomy. This classified the volume of effusion as compared to middle ear volume categorically as either full, partial, or clear of effusion. The type of wideband acoustic immittance explored in this work was absorbance. Absorbance responses were grouped based on effusion volume into one of four groups: full effusions, partial effusions, ears clear of effusion at the time of surgery, and normal control ears. Standard tympanometry was also completed on all ears.
Results: Absorbance is systematically reduced as the volume of the middle ear effusion increases. This reduction is present at most frequencies but is greatest in the frequency range from 1 to 5 kHz. A multivariate logistic regression approach was utilized to classify ears based on effusion volume. The regression approach classified ears as effusion present (full and partial ears) or absent (clear ears and normal control ears) with 100% accuracy, ears with effusion present as either partial or full with 100% accuracy, and ears without effusion as either normal control ears or ears clear of effusion with 75% accuracy. Regression performance was also explored when the dataset was split into a training set (70% of the data) and a validation test set (30% of the data) to simulate how this approach would perform on unseen data in a clinical setting. Accuracy, sensitivity, specificity, and area under the receiver operating characteristic curve are reported. Overall, this approach demonstrates high sensitivity and specificity for classifying ears as effusion being present or absent and as present effusions being full or partial with areas under the curve ranging from 1 to 0.944. Despite the lack of effusion present in both clear ears and normal control ears, this approach was able to distinguish between these ears, but with a more moderate sensitivity and specificity. No systematic effect of effusion volume was found on standard tympanometry.
Conclusions: Wideband acoustic immittance, and more specifically, absorbance, is a strong and sensitive indicator of the volume of a middle ear effusion in children with otitis media with effusion.Disponible en ligne : Oui En ligne : https://login.ezproxy.vinci.be/login?url=https://ovidsp.ovid.com/ovidweb.cgi?T=J [...] Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=289249
in Ear and hearing > Vol. 42, n°5 (Septembre-Octobre 2021) . - p. 1183-1194[article]
Titre : A Longitudinal Analysis of Pressurized Wideband Absorbance Measures in Healthy Young Infants Type de document : Article Auteurs : Hamzah Wali ; Rafidah Mazlan ; Joseph Kei Année de publication : 2019 Article en page(s) : p. 1233-1241 Langues : Anglais (eng) Descripteurs : HE Vinci
Absorbance acoustique ; Nouveau-né ; Oreille moyenne
Autres descripteurs
Reflexion a large bandeRésumé : Objectives: Wideband absorbance (WBA) is an emerging technology to evaluate the conductive pathway (outer and middle ear) in young infants. While a wealth of research has been devoted to measuring WBA at ambient pressure, few studies have investigated the use of pressurized WBA with this population. The purpose of this study was to investigate the effect of age on WBA measured under pressurized conditions in healthy infants from 0 to 6 months of age.
Design: Forty-four full-term healthy neonates (17 males and 27 females) participated in a longitudinal study. The neonates were assessed at 1-month intervals from 0 to 6 months of age using high-frequency tympanometry, acoustic stapedial reflex, distortion product otoacoustic emissions, and pressurized WBA. The values of WBA at tympanometric peak pressure (TPP) and 0 daPa across the frequencies from 0.25 to 8 kHz were analyzed as a function of age.
Results: A linear mixed model analysis, applied to the data, revealed significantly different WBA patterns among the age groups. In general, WBA measured at TPP and 0 daPa decreased at low frequencies (
Conclusions: The present study provided clear evidence of maturation of the outer and middle ear system in healthy infants from birth to 6 months. Therefore, age-specific normative data of pressurized WBA are warranted.Disponible en ligne : Oui En ligne : https://login.ezproxy.vinci.be/login?url=http://ovidsp.ovid.com/ovidweb.cgi?T=JS [...] Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=254879
in Ear and hearing > Vol. 40, n°5 (Septembre octobre 2019) . - p. 1233-1241[article]
