Fig. 4

Mean values of slope and slope difference for SFOAE STCs and PTCs. Mean values of slopes (top row) and slope differences (bottom row) of tail, LF and HF (from left to right column) for SFOAE STCs (red lines) and PTCs (blue lines) as a function of f _p at L _ps of 30 dB SPL (dotted lines) and 50 dB SPL (solid lines). Error bars denote ±1 SD