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Verfasst von:Hoth, Sebastian [VerfasserIn]   i
 Lochmann, Holger Peer [VerfasserIn]   i
Titel:Dual response audiometry
Titelzusatz:a time-saving technique for enhanced objective auditory assessment
Verf.angabe:Sebastian Hoth & Holger Lochmann
Jahr:1999
Umfang:6 S.
Teil:volume:38
 year:1999
 number:4
 pages:235-240
 extent:6
Fussnoten:Elektronische Reproduktion der Druck-Ausgabe ; Gesehen am 25.02.2021
Titel Quelle:Enthalten in: International journal of audiology
Ort Quelle:London [u.a.] : Taylor & Francis Group, 2002
Jahr Quelle:1999
Band/Heft Quelle:38(1999), 4, Seite 235-240
ISSN Quelle:1708-8186
Abstract:The effectiveness of objective audiometric assessment can be improved by simultaneously recording transient evoked otoacoustic emissions (TEOAE) and auditory brainstem responses (ABR). Using a stimulation paradigm based on sequences of linearly balanced click stimuli (as described by Kemp et al.1) acoustical and electrical responses of the auditory system can be obtained in one single run (dual response audiometry, DRA). The click stimuli are presented via an ear canal probe containing a speaker and a miniature microphone. EEG activity is recorded from surface electrodes fixed at the vertex and the mastoid ipsilateral to stimulus presentation. Microphone output and voltage difference between electrodes are fed into a dual-channel data acquisition system, where they are separately amplified and filtered into appropriate frequency ranges. After each stimulus, sweeps of 256 samples within a time window of 17 ms are taken of both signals. They are subject to artefact rejection and averaging of amplitude and polarity. The electrical responses to low and high level clicks within one stimulus sequence are processed separately, whereas the acoustical responses are summated across levels in order to eliminate stimulus-related contamination. As the result of one single run, ABR at two levels and non-linear TEOAEs are obtained within approximately 1 min. The signal quality is estimated by correlation analysis and binomial statistics. Among various features of DRA, the most important advantage is the improvement of the success rate. The influence of perturbations is limited since muscle artefacts due to motor activity affect only the ABR, whereas noise contamination affects only the TEOAE. The accuracy of threshold determination is better than with conventional ABR since the stimulus level is measured in situ. One DRA examination provides complete information about the functional integrity of the cochlea and neural pathways without additional time. It appears ideal for the application as a second stage infant screen.
DOI:doi:10.3109/00206099909073027
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: https://doi.org/10.3109/00206099909073027
 Volltext: https://www.tandfonline.com/doi/abs/10.3109/00206099909073027
 DOI: https://doi.org/10.3109/00206099909073027
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:Auditory brainstem responses
 Hearing disorders
 Infant screening
 Objective audiometry
 Otoacoustic emissions
K10plus-PPN:1749425106
Verknüpfungen:→ Zeitschrift

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