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A picture of one ear (left column), then the transfer functions (center column) at +40° in elevation (blue line) and −40° in elevation (red line) and finally the DTFs (right column) for a child (Fig. 4A; C7: 9 years old), a young adult (Fig. 4B; YA1: 22 years old) and for an older subject (Fig. 4C; E2: 80 years old). The measured DTF (right) shows the characteristic depression (notch) between 5 and 13 kHz.
