ASA 127th Meeting M.I.T. 1994 June 6-10

4pSP13. Perceptual normalization of speech and nonspeech.

Mark A. Pitt

Dept. of Psychol., Ohio State Univ., 1885 Neil Ave., Columbus, OH 43210

Within the information processing approach to speech perception, the problem of acoustic-phonetic variability is solved by positing multiple stages of processing that transform the acoustic input into a stable phonetic percept. If this problem is viewed as part of the broader problem of perceptual normalization, a question that arises is whether the mechanisms that normalize speech stimuli also normalize nonspeech stimuli. Five experiments addressed this question by investigating the normalization of musical timbre using a selective adaptation paradigm. The results parallel some of those found with speech, suggesting that a single mechanism normalizes both types of stimuli.