Figure 2:

Mean (+/−SEM) audiogram from 10 young females and 10 young males ages 20–27. Mean thresholds in the 0.25–8 kHz range of the clinical audiogram (shaded region) were clinically normal (<25 dB HL) for both males and females. Although male thresholds were slightly higher than females, the gender differences were not significantly different. However, thresholds in the extended high frequency range (10–16 kHz) increased with frequency in males and exceeded the 25 dB HL cutoff for normal at 14 and 16 kHz. Male thresholds were significantly higher than females at 12.5 kHz (p<0.01), 14 kHz (p<0.001) and 16 kHz (p<0.001).