Application of Cortical Processing Theory to Acoustical Analysis

Abstract

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.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2004
Accession Number
ADA426854

Entities

People

  • Oded Ghitza

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Auditory Nerve
  • Auditory Perception
  • Background Noise
  • Bandwidth
  • Boundaries
  • Brain
  • Closed Loop Systems
  • Dynamic Range
  • Feedback
  • Filters
  • Frequency
  • Frequency Bands
  • Frequency Response
  • Mechanical Properties
  • Membranes
  • Open Loop Systems
  • Perception

Fields of Study

  • Psychology

Readers

  • Robotics and Automation.
  • Speech Processing/Speech Recognition.
  • Theoretical Analysis.