Akademik

figment
   A term used to denote a half-formed, fragmentary sound that remains below the level of a recognizable percept. The auditory perception of figments can occur in the context of a * migraine aura, * delirium, and other CNS disorders. In such cases auditory 'filling in' may lead to the mediation of * auditory illusions. Similarly, the term figment is used to denote a half-formed, fragmentary image perceived in the visual modality.
   References
   Sacks, O. (1992). Migraine. Revised and expanded. New York, NY: Vintage Books.

Dictionary of Hallucinations. . 2010.