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. Author manuscript; available in PMC: 2021 Mar 1.
Published in final edited form as: Ear Hear. 2020 Mar-Apr;41(2):239–253. doi: 10.1097/AUD.0000000000000536

Figure 4. Maturational effects on DPOAE level are evident for a wide range of f2 frequencies, and are less pronounced in childhood than infancy.

Figure 4.

Plot shows the median of the posterior distribution of the mean difference in estimated DPOAE level taken between specific ages indicated as points along the thick black line from Fig. 4. Panel A shows the contrast between 1 and 13 months; Panel B shows the contrast between 36 and 48 months of life. In both panels, results are plotted by f2. The thick and thin portions of the error bars indicate the corresponding 25th – 75th and 5th – 95th percentile ranges, respectively. The estimated maturational change during the first year of life is a 2–5 dB decrease in DPOAE level at most f2’s, with no change at 6 and 7 kHz. Panel B indicates less maturational change (1 dB/year) from 36 to 48 months of age and greater certainty in the estimate.