On the bistability of sine wave analogues of speech

Our studies revealed two stable modes of perceptual organization, one based on attributes of auditory sensory elements and another based on attributes of patterned sensory variation composed by the aggregation of sensory elem ents III a dual-task method, listeners attended concurrently to both aspect s component and pattern, of a sine wave analogue of a word. Organization of elements,vas indexed by several single-mode tests of auditory form percept ion to verify the perceptual segregation of either an individual formant of a synthetic word or a tonal component of a sinusoidal word analogue. Organ ization of patterned variation was indexed by a test of lexical identificat ion. The results show the independence of the perception of auditory and ph onetic form, which appear to be differently organized concurrent effects of the same acoustic cause.