Abstract
Warren, Bashford, and Gardner (1990) found that when sequences consisting of 10 40-msec steady-state vowels were presented in recycled format, minimal changes in order (interchanging the position of two adjacent phonemes) produced easily recognizable differences in verbal organization, even though the vowel durations were well below the threshold for identification of order. The present study was designed to determine if this ability to discriminate between different arrangements of components is limited to speech sounds subject to verbal organization, or if it reflects a more general auditory ability. In the first experiment. 10 40-msec sinusoidal tones were substituted for the vowels; it was found that the easy discrimination of minimal changea in order is not limited to speech sounds. A second experiment substituted 10 40-msec frozen noise segments for the vowels. The succession of noise segments formed a 400-msec frozen noise pattern that cannot be considered as a sequence of individual sounds, as can the succession of vowels or tones. Nevertheless, listeners again could discriminate between patterns differing.only in the order of two adjacent 40-msec segments. These results, together with other evidence, indicate that it is not necessary foracoustic sequences of brief items (such as phonemes and tones) to be processed asperceptual sequences (that is, as a succession of discrete identifiable sounds) for different arrangements to be discriminated. Instead, component acoustic elements form distinctive “temporal compounds,” which permit listeners to distinguish between different arrangements of portions of an acoustic pattern without the need for segmentation into an ordered series of component items. Implications for models dealing with the recognition of speech and music are discussed.
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This research as supported by Grant 88-0320 from the Air Force Office of Scientific Research and Grant DC 00208 from the National Institute on Deafness and Other Communication Disorders.
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Warren, R.M., Bashford, J.A. When acoustic sequences are not perceptual sequences: The global perception of auditory patterns. Perception & Psychophysics 54, 121–126 (1993). https://doi.org/10.3758/BF03206943
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DOI: https://doi.org/10.3758/BF03206943