When a receiver of acoustic signals is surrounded by several vibrating bodies, it becomes important to “sort out” sound energies into subparts appropriately to represent the original sources. This issue is called a problem of source segregation, and has been investigated in several ways as a core of the auditory scene analysis. Pitch, or a perceptual attribute corresponding to the fundamental periodicity, has been regarded as one of significant cues for sound segregation. It has been also known that “timbre” can function as another cue (Bregman 1990). However, there are still some problems with the ambiguity in the definition of timbre.
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Tsuzaki, M., Takeshima, C., Irino, T., Patterson, R.D. (2007). Auditory Stream Segregation Based on Speaker Size, and Identification of Size-Modulated Vowel Sequences. In: Kollmeier, B., et al. Hearing – From Sensory Processing to Perception. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73009-5_31
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