Figure 2: The reproducibility of the sound impulse induced transient increase in DPOAE intensity. Different lines and symbols show the results of how 10 sec, sequentially applied, 50 dB SPL pure tone stimuli evoked changes in the DPOAE magnitude at 5 different times in each subject. The graphs ((a), (b), (c)) demonstrate different subjects (no. 2, 5, 7) with different characteristic frequencies ((a): 1593 Hz, (b): 2000 Hz, (c): 3187 Hz).