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Mean SFOAE STC at 1,000 (black) and 4,000 Hz (gray) probe frequencies for 10, 20, and 30 dB SL probe levels (columns) and −6, 0, and 6 dB SPL residual criteria (rows). Error bars denote ±1 standard error (SE). The number (n) of STCs collected for each condition is indicated in each subplot.
