Also referred to as acoasm, acousma, and akoasmic noise. All four terms stem from the Greek verb akouein, which means to hear. The term akoasm was introduced in or shortly before 1900 by the German neurologist Carl Wernicke (18481904) to denote relatively simple, *nonverbal (or *nonvocal) auditory hallucinations such as buzzing sounds, rappings, and rustling noises. Wernicke used the term akoasm in opposition to the term * phoneme (which is used as a synonym for * verbal auditory hallucination).
   Wernicke, C. (1900). Grundriss der Psychiatrie. Leipzig: Verlag von Georg Thieme.
   Critchley, M. (1939). Visual and auditory hallucinations. British Medical Journal, 2, 634-639.
   Blom, J.D., Sommer, I.E.C. (2009). Auditory hallucinations. Cognitive and Behavioral Neurology (in press).

Dictionary of Hallucinations. . 2010.

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  • akoasm — noun ăk ō ăz"əm An auditory hallucination …   Wiktionary

  • exploding head syndrome —    Also known as auditory sleep start. The term exploding head syndrome was introduced in or shortly before 1988 by the British neurologist John M.S. Pearce (b. 1936) to denote an abrupt and exceptionally loud akoasm (i.e. a nonverbal auditory… …   Dictionary of Hallucinations

  • acoasm —    see akoasm …   Dictionary of Hallucinations

  • acousma —    see akoasm …   Dictionary of Hallucinations

  • akoasmic noise —    see akoasm …   Dictionary of Hallucinations

  • nonverbal auditory hallucination —    Also known as akoasm, acoasm, acousma, *nonverbal hallucination, and nonvocal auditory hallucination. All six terms are used to denote an * auditory hallucination consisting of one or more sounds or noises, other than spoken words. The group… …   Dictionary of Hallucinations

  • phoneme —    Also known as phonemic hallucination. Both terms are indebted to the Greek noun phoneme, which means voice or sound. In biomedicine, the term phoneme was introduced in or shortly before 1900 by the German neurologist Carl Wer nicke (1848 1904) …   Dictionary of Hallucinations