Fig. 2

The figure represents the median and interquartile range of hearing for different age groups. Relationship between PTA’ and age group: X-axis represents the age group: gp 1: ≤6 years (n_ears = 15); gp 2: 7–9 years (n_ears = 43); gp 3: 10–12 years (n_ears = 52); gp 4: 13–15 years (n_ears = 30); gp 5: 16–18 years (n_ears = 19); and gp 6: > 18 years (n_ears = 16); Y-axis represents the PTA’ (dB HL); PTA’: mean of hearing thresholds at 0.5 kHz, 1 kHz, and 2 kHz; n = 175 data points