Abstract
Multiband peaky speech is a new method that uses narrated stories to evoke frequency-specific auditory brainstem responses (ABRs). However, testing times are not clinically feasible; thus, new efforts focus on maximizing response amplitude to facilitate faster testing. Recent work suggests that narrator f0, as well as chirp rather than zero phases, evoke larger ABRs. This study aimed to identify the optimal f0–phase combination for evoking large ABRs with multiband peaky speech. Using 11 stories with original f0s ranging from 114–230 Hz, the mean f0 over 15 minutes was shifted to f0s from 70–220 Hz in 10 Hz steps and then dichotic multiband peaky speech created using zero- and chirp-phases. A validated computational model of the auditory periphery was used to simulate ABRs using a flat 0 dB HL hearing configuration. Based on the simulated wave V amplitudes across all conditions, the optimal parameters for simulated ABRs to multiband peaky speech include stories with original f0s <170 Hz that have been shifted to a 100–110 Hz mean f0 and modified with a chirp-phase profile. Next we plan to confirm these parameters with measured ABR responses from adults with normal hearing. [Work funded by Hearing Health Foundation ERG.]
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