Oscillocusis: an unusual auditory aura in migraine.

We report a 14-year-old girl with a migraine aura characterized by the sense that ambient sounds were fluctuating in intensity, as if emanating from a radio while the volume control was being altered. These auditory oscillations lasted 5 to 10 minutes and were followed by a typical migraine headache. By analogy with oscillopsia, we term this unique form of migraine aura "oscillocusis."