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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
Immitance acoustique ; Physique de l'audition ; Reflectance acoustique ; Reflexion a large bande ; Tympanometrie multifrequentielle
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DisponibleCochlear Reflectance and Otoacoustic Emission Predictions of Hearing Loss / Stephen T. Neely in Ear and hearing, Vol. 40, n°4 (Juillet-aout 2019)
Titre : Cochlear Reflectance and Otoacoustic Emission Predictions of Hearing Loss Type de document : Article Auteurs : Stephen T. Neely ; Sara E. Fultz ; Judy G. Kopun ; [et al.] Année de publication : 2019 Article en page(s) : p.951-960 Langues : Anglais (eng) Descripteurs : Autres descripteurs
Perte auditive neurosensorielle ; Produit de distorsion acoustique (PDA) ; Troubles sensitifs
Résumé : Objectives: Cochlear reflectance (CR) is the cochlear contribution to ear-canal reflectance. CR is a type of otoacoustic emission (OAE) that is calculated as a transfer function between forward pressure and reflected pressure. The purpose of this study was to compare wideband CR to distortion-product (DP) OAEs in two ways: (1) in a clinical-screening paradigm where the task is to determine whether an ear is normal or has hearing loss and (2) in the prediction of audiometric thresholds. The goal of the study was to assess the clinical utility of CR.
Design: Data were collected from 32 normal-hearing and 124 hearing-impaired participants. A wideband noise stimulus presented at 3 stimulus levels (30, 40, 50 dB sound pressure level) was used to elicit the CR. DPOAEs were elicited using primary tones spanning a wide frequency range (1 to 16 kHz). Predictions of auditory status (i.e., hearing-threshold category) and predictions of audiometric threshold were based on regression analysis. Test performance (identification of normal versus impaired hearing) was evaluated using clinical decision theory.
Results: When regressions were based only on physiological measurements near the audiometric frequency, the accuracy of CR predictions of auditory status and audiometric threshold was less than reported in previous studies using DPOAE measurements. CR predictions were improved when regressions were based on measurements obtained at many frequencies. CR predictions were further improved when regressions were performed on males and females separately.
Conclusions: Compared with CR measurements, DPOAE measurements have the advantages in a screening paradigm of better test performance and shorter test time. The full potential of CR measurements to predict audiometric thresholds may require further improvements in signal-processing methods to increase its signal to noise ratio. CR measurements have theoretical significance in revealing the number of cycles of delay at each frequency that is most sensitive to hearing loss.
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in Ear and hearing > Vol. 40, n°4 (Juillet-aout 2019) . - p.951-960[article]Effects of Early- and Late-Arriving Room Reflections on the Speech-Evoked Auditory Brainstem Response / Rida Al Osman in Journal of the American Academy of Audiology (JAAA), Vol. 29, n°2 (February 2018)
Titre : Effects of Early- and Late-Arriving Room Reflections on the Speech-Evoked Auditory Brainstem Response Type de document : Article Auteurs : Rida Al Osman ; Christian Giguère ; Hilmi R. Dajani Année de publication : 2018 Article en page(s) : p. 94-94 Langues : Anglais (eng) Descripteurs : Autres descripteurs
Reflectance acoustique ; Reverberation
Traitement du signal sonore
Résumé : Background:
Room reverberation alters the acoustical properties of the speech signals reaching our ears, affecting speech understanding. Therefore, it is important to understand the consequences of reverberation on auditory processing. In perceptual studies, the direct sound and early reflections of reverberated speech have been found to constitute useful energy, whereas the late reflections constitute detrimental energy.
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in Journal of the American Academy of Audiology (JAAA) > Vol. 29, n°2 (February 2018) . - p. 94-94[article]Effects of Otosclerosis on Middle Ear Function Assessed With Wideband Absorbance and Absorbed Power / M. Patrick Feeney in Ear and hearing, Vol. 42, n°3 (Mai- Juin 2021)
Titre : Effects of Otosclerosis on Middle Ear Function Assessed With Wideband Absorbance and Absorbed Power Type de document : Article Auteurs : M. Patrick Feeney ; Douglas H. Keefe ; Lisa L. Hunter ; Dennis F. Fitzpatrick ; Daniel B. Putterman ; Angela C. Garinis Année de publication : 2021 Article en page(s) : p. 547-557 Langues : Anglais (eng) Descripteurs : Autres descripteurs
Otosclerose ; Reflectance acoustique
Absorbance acoustique ; Oreille moyenne ; Tympanométrie ; Wideband absorbance (WBA)
Résumé : Objective: Wideband absorbance and absorbed power were evaluated in a group of subjects with surgically confirmed otosclerosis (Oto group), mean age 51.6 years. This is the first use of absorbed power in the assessment of middle ear disorders. Results were compared with control data from two groups of adults, one with normal hearing (NH group) mean age of 31 years, and one that was age- and sex-matched with the Oto group and had sensorineural hearing loss (SNHL group). The goal was to assess group differences using absorbance and absorbed power, to determine test performance in detecting otosclerosis, and to evaluate preoperative and postoperative test results.
Design: Audiometric and wideband tests were performed over frequencies up to 8 kHz. The three groups were compared on wideband tests using analysis of variance to assess group mean differences. Receiver operating characteristic (ROC) curve analysis was also used to assess test accuracy at classifying ears as belonging to the Oto or control groups using the area under the ROC curve (AUC). A longitudinal design was used to compare preoperative and postoperative results at 3 and 6 months.
Results: There were significant mean differences in the wideband parameters between the Oto and control groups with generally lower absorbance and absorbed power for the Oto group at ambient and tympanometric peak pressure (TPP) depending on frequency. The SNHL group had more significant differences with the Oto group than did the NH group in the high frequencies for absorbed power at ambient pressure and tympanometric absorbed power at TPP, as well as for the tympanometric tails. The greatest accuracy for classifying ears as being in the Oto group or a control group was for absorbed power at ambient pressure at 0.71 kHz with an AUC of 0.81 comparing the Oto and NH groups. The greatest accuracy for an absorbance measure was for the comparison between the Oto and NH groups for the peak-to-negative tail condition with an AUC of 0.78. In contrast, the accuracy for classifying ears into the control or Oto groups for static acoustic admittance at 226 Hz was near chance performance, which is consistent with previous findings. There were significant mean differences between preoperative and postoperative tests for absorbance and absorbed power.
Conclusions: Consistent with previous studies, wideband absorbance showed better sensitivity for detecting the effects of otosclerosis on middle ear function than static acoustic admittance at 226 Hz. This study showed that wideband absorbed power is similarly sensitive and may perform even better in some instances than absorbance at classifying ears as having otosclerosis. The use of a group that was age- and sex-matched to the Oto group generally resulted in greater differences between groups in the high frequencies for absorbed power, suggesting that age-related norms in adults may be useful for the wideband clinical applications. Absorbance and absorbed power appear useful for monitoring changes in middle ear function following surgery for otosclerosis.
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in Ear and hearing > Vol. 42, n°3 (Mai- Juin 2021) . - p. 547-557[article]Estimating the acoustic reflex threshold from wideband measures of reflectance, admittance, and power / M. Patrick Feeney in Ear and hearing, Vol.22, n° 4 (Août 2001)
Titre : Estimating the acoustic reflex threshold from wideband measures of reflectance, admittance, and power Type de document : Article Auteurs : M. Patrick Feeney ; Douglas H. Keefe Année de publication : 2001 Langues : Anglais (eng) Descripteurs : Autres descripteurs
Admittance acoustique ; Réflexe acoustique
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in Ear and hearing > Vol.22, n° 4 (Août 2001)[article]Identification of neonatal hearing impairment:ear-canal measurements of acoustic admittance and reflectance in neonates / Douglas H. Keefe in Ear and hearing, Vol.21, n° 5 (Octobre 2000)PermalinkIdentifying otosclerosis with aural acoustical tests of absorbance, group delay, acoustic reflex threshold, and otoacoustic emissions / Douglas H. Keefe in Journal of the American Academy of Audiology (JAAA), Vol.28, n°9 (October 2017)PermalinkInstrumentation for audiology and hearing science / Shlomo Silman (2012)PermalinkMeasurement of the Electrically Evoked Stapedial Reflex Response with Wideband Acoustic Reflectance Measurement / Jace Wolfe in Journal of the American Academy of Audiology (JAAA), Vol. 29, n°4 (April 2018)PermalinkPreserving Wideband Tympanometry Information With Artifact Mitigation / Kristine E. Eberhard in Ear and hearing, Vol.43, n°2 (Mars-avril 2022)PermalinkSources of variability in reflectance measurements on normal cadaver ears / Susan E Voss in Ear and hearing, Vol.29, n° 4 (Août 2008)PermalinkWideband acoustic immitance measurements in assessing crimping status following stapedotomy : a temporal bone study / Inge Wegner ; Navid Shahnaz ; Wilko Grolman ; Manohar L. Bance in International Journal of Audiology IJA, Vol. 56, n° 1-12 (January-December 2017)PermalinkWideband Reflectance Norms for Caucasian and Chinese Young Adults / Navid Shahnaz in Ear and hearing, Vol.27, n° 6 (Décembre 2006)Permalink