Figure 6.
Speaker differences in amplitude variability over time in ∕h∕ (left), ∕s∕ (middle), and ∕z∕ (right). Top to bottom: row A, speaker 10F2 (10-year-old female). Row B, 5M1 (5-year-old male). Row C, 5F1 (5-year-old female). Row D, 10F3 (10-year-old female). Row E, 5M4 (5-year-old male). Row F, AF7 (adult female). Rows A and B show speakers who had relatively high variability in ∕h∕ and ∕s∕ but less in ∕z∕; C and D represent speakers with relatively high variability in ∕s∕ and ∕z∕ but less in ∕h∕; E and F show speakers where variability is similar across the three consonants.