Physiology. Tones produced
by distorsion in the cochlea in response to two pure tones. A healthy cochlea stimulated simultaneously by two pure tones generates additional frequency components called distortion products. These are not present in the original
stimuli and are due to the two-tone interactions caused by the non-linearity
of the cochlea. DPOAEs are recorded by a microphone placed in the ear channel. They are useful to test hearing, especially of newborns.
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