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(Color online) Detection thresholds in dB SPL as a function of frequency in kHz for 7 HI listeners. Thresholds were measured using 500-msec tones in a three-alternative, forced-choice, adaptive procedure. Age in years and PTA in dB HL (averaged over the 5 octave frequencies between 0.25 and 4.0 kHz) are provided in the panel for each HI listener.
