The Modulation Transfer Function for Speech Intelligibility
Figure 5
Comprehension of “core” modulations in speech with notch filtering.
(A,B) Notch filters in the spectral (A) or temporal (B) modulation domain removed modulations from sentences that contained only core modulations after having been low-pass filtered in both domains. As depicted in Figure 4C, x- and y-axes are 0 to ±7.75 Hz and 0 to 3.75 cycles/kHz, respectively. (C,D) Comprehension when spectral (C) or temporal (D) notch filters were applied to sentences containing only core modulations. See Figure 6C for a thumbnail of the core modulations. As in Figures 5 and 6, conditions which share no lower-case labels in common are significantly different (repeated measures ANOVA).