Journal of Communication Disorders, Deaf Studies & Hearing Aids
Open Access

Prediction of frequency-specific hearing threshold using chirp-ABR in young children

International Conference and Expo on Audiology and Hearing Devices

August 17-18, 2015 Birmingham, UK

Zheng-min Xu

Posters-Accepted Abstracts: Commun Disord Deaf Stud Hearing Aids

Abstract :

The Chirp-Stimulus generates an optimized synchronous excitation of neurons in all regions of the basilar membrane. The stimulus
structure allows modification to excite predefined regions in the cochlear. However, the chirp-ABRs have been investigated in few
studies involving young children with varying degrees of hearing loss. Only some researchersreported that in this study a variety of
tools were used to analyze the synchronicity of ABRs evoked by chirp- and click-stimuli at 40 dB HL in 32 normal hearing subjects
aged 18 to 55 years. In our recent study, we investigated the relationship chirp-ABR and behavioral visual reinforcement audiometric
(VRA) hearing thresholds in a group of infants with varying degrees of sensorineural hearing loss. In particular, we examine how
accurately the prediction formulae (which were based on Chirp-ABR/VRA threshold correlation data) estimated hearing threshold
in order to find out if it is possible to be used as the clinical application with regard to diagnostic audiology in young children. This
study demonstrates the effective implementation of chirp-ABR predicted frequency-specific thresholds, especially of low- middlefrequency.
The use of a chirp-ABR testing could be higher sensitivity and accuracy than that of auditory steady-state evoked response
(ASSR) for measuring frequency-specific thresholds in young children.