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[Threshold prediction in adults with normal hearing using ASSR, Tb-ABR and c-ABR: a within-subject comparison].

Yijie Wu, Hao Wu, Yun Li, Jiaxiong Zhang

Abstract

OBJECTIVE: To evaluate the accuracy with which auditory steady-state response (ASSR), tone burst auditory brain stem response (Tb-ABR) and click-evoked auditory brainstem response (c-ABR) thresholds predict behavioral thresholds, using a within-subjects design. METHOD: ASSR, Tb-ABR and c-ABR thresholds were recorded in a group of adults with normal hearing (58 ears). Evoked-potential thresholds were recorded and compared with behavioral, pure-tone thresholds. RESULT: The results suggested both ASSR and Tb-ABR thresholds had high correlations to pure-tone thresholds. Tb-ABR thresholds were recorded much closer to behavioral threshold than ASSR thresholds. There was a linear relation between c-ABR thresholds and average thresholds of 2 kHz, 4 kHz pure tone audiometry. CONCLUSION: Both the ABR and the ASSR provided reasonably accurate predictions of multifrequencies behavioral threshold. Tb-ABR combined with c-ABR may take the accuracy predicted behavioral threshold.

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Key concepts: Audiology, Auditory brainstem response, Tone burst, Audiometry, Absolute threshold of hearing, Medicine, Hearing loss