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. 2014 Jan;135(1):300–314. doi: 10.1121/1.4840775

Figure 3.

Figure 3

(Color online) Global hearing thresholds for subjects with anomalous threshold microstructure patterns (subject 14, black squares; subject 15, light gray stars; and subject 18, dark gray triangles). The SOAE+ mean threshold data are also supplied (crosses, n = 17 ears). Three-day average SOAE amplitude and frequency are indicated for each subject by corresponding arrows. Compared to the mean thresholds of the SOAE+ group, the thresholds at 8 kHz in subject 14 and thresholds between 8 and 18 kHz in subject 18 are elevated. Subject 15 possesses thresholds within or below the rest of the SOAE+ group mean, but the corner frequency of the audiogram appears to be directly above the SOAE. A high level SOAE was recorded at 8.7 kHz in subject 14. Subject 15 and 18 had lower amplitude, but high-frequency SOAEs as shown by the arrows. In these three exceptional cases, the expected patterns of threshold microstructure were not observed.