Auditory brainstem response (ABR) is commonly used for hearing screening and is considered as one of the important means of objective audiometry. Speech ABR is a relatively new concept and is regarded as a marker of speech encoding at the brainstem level. One of the potential uses of speech ABR is in selection and evaluation of hearing aid performance. Measurement of speech ABR can be associated with artefacts. Here authors have used wireless techniques to transmit the stimulus to the hearing aid to reduce artefacts caused by head movement. Data were recorded using a new 32 channel BrainAmp EEG system. It improved signal-to -–noise ratio and quality of speech ABR. A high quality speech ABR can provide precise spectro-temporal information on auditory processing. This research work is an improvement over previous studies using low frequency auditory steady state response (ASSR) and cortical evoked response audiometry (CERA). However, this study is based on the responses obtained from four healthy adult subjects only. Further study on a larger number of subjects is required, specifically in hearing impaired children, before the widespread use of technology. This technique can be valuable in difficult to evaluate patients who require hearing aids.

Speech auditory brainstem response through hearing aid stimulation.
Bellier L, Veuillet E, Vesson J F, Bouchet P, Caclin A, Thai-van H.
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Faiz Tanweer

Leeds General Infirmary, UK.

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