Auditory nerve single-unit population studies have demonstrated that phase-locking plays a
dominant role in the neural encoding of both the spectrum and voice pitch of speech sounds.
Phase-locked neural activity underlying the scalp-recorded human frequency-following
response (FFR) has also been shown to encode certain spectral features of steady-state and
time-variant speech sounds as well as pitch of several complex sounds that produce time-
invariant pitch percepts. By extension, it was hypothesized that the human FFR may …