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Final multi-level model graphs for different prototypical trajectories for intelligibility as a function of total distortion for listeners with the following characteristics: 1) High-RST, age 65 years, and a 4 kHz threshold of 55 dB HL; 2) Low-RST, age 65 years, and a 4 kHz threshold of 55 dB HL; 3) Low-RST, age 65 years, and a 4 kHz threshold of 75 dB HL and 4) Low-RST, age 80 years, and a 4 kHz threshold of 75 dB HL.
