Application of Cortical Processing Theory to Acoustical Analysis
Final rept. 1 Sept 2003-14 Oct 2004
SENSIMETRICS CORP SOMERVILLE MA
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This report summarizes work that has been completed in Phase I of the STTR program. We have implemented a closed-loop model of the auditory periphery with an efferent-inspired feedback and have quantitatively demonstrated its ability to produce spectrograms of noisy speech samples that are far more consistent with spectrograms of speech in quiet than are spectrograms produced by an open-loop model of the auditory periphery. This increase in performance in noise and increased robustness mimics the general observed behavior of humans. Whether this model of auditory periphery preserves phonetic information in patterns that follow psychophysical patterns will be rigorously inspected during Phase II, where the central part of the proposal, i.e. the formulation of a perception-based distance measure, will be established.
- Anatomy and Physiology