Figure 5.

An outlier case where the total response magnitude was large but the subject’s speech perception performance was less than expected (see asterisk in Figure 4). The stimulus was 500 Hz at 90 dB nHL. The small amount of harmonic distortion indicates that the ongoing response was primarily a cochlear microphonic with no contribution from neural phase-locking. Note also the lack of a compound action potential. This pattern of results suggests a limited neural response.