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. Author manuscript; available in PMC: 2020 Oct 1.
Published in final edited form as: Hear Res. 2019 Aug 27;382:107795. doi: 10.1016/j.heares.2019.107795

Figure 4: Brainstem speech processing as a function of noise and hearing loss.

Figure 4:

(A) Source FFR spectra for response to clear and degraded speech. Strong energy is observed at the voice fundamental frequency (F0) but much weaker energy tagging the upper harmonics of speech, consistent with age-related declines in high-frequency spectral coding. Group and noise-related effects in FFRs were less apparent than in the cortical ERPs (cf. Fig. 3). errorbars = ± s.e.m.