THE HEARLAB CORTICAL TONE EVALUATION (CTE) PROTOCOL: A CLINICAL FEASIBILITY STUDY
Journal Title: Journal of Hearing Science - Year 2016, Vol 6, Issue 3
Abstract
Background: Cortical auditory evoked potentials (CAEPs) have been shown to demonstrate high correlations with pure-tone behavioral thresholds when using research protocols. However, experience using the HEARLab cortical tone evaluation (CTE) procedure clinically in sites independent of the National Acoustic Laboratories (NAL) remains limited. This study aimed to assess the clinical feasibility of the CTE protocol using the HEARLab system to estimate pure-tone behavioral thresholds at 500, 1000, 2000, and 4000 Hz. Materials and methods: This is a preliminary prospective study designed to compare behavioral hearing thresholds with air conduction CTE of 12 adults (8 with normal hearing and 4 with sensorineural hearing loss). A cortical auditory evoked potential (CAEP) threshold protocol was modeled after an existing auditory brainstem response (ABR) protocol used in-house. A t-test was used to identify differences between pure-tone behavioral thresholds and CTE thresholds. Results: Depending on frequency and intensity, CTEs varied from pure-tone behavioral thresholds by as much as 11.2 dB. The average test time to obtain CTEs at four frequencies per ear for 12 participants was 50.85 minutes (SD=12.0). Implications for inter-test reliability of the CTE protocol are discussed Conclusions: The HEARLab CTE protocol is feasible for predicting pure-tone behavioral thresholds in those with normal hearing or with hearing loss. The CTE procedure is a useful alternative tool when behavioral threshold testing is neither possible nor practical.
Authors and Affiliations
Ahmad A. Alanazi, Nannette Nicholson, Samuel R. Atcherson, Patti Martin
Keywords
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