Nonlinear hearing aid: change in frequency-gain
as input level increases from 50 to 80 dB SPL and
no IMD because response at 80 dB SPL has same
“morphology” as response at 50 dB SPL
CR= 2.1 (40 dB change
in input (50-90); 19 dB
(82-101 dB) change
in output.) 40/19=2.1
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