Representation of Spectral Profiles in the Auditory System. 2. Detection of Spectral Peak Shape Changes

Abstract

Based on the ripple analysis model outlined in Part I of this paper, predictions are made for the detection of shape changes in spectral peak profiles. Peak shape is uniquely described in terms of two parameters: bandwidth factor (BWF) which reflects the tuning or sharpness of a peak, and a symmetry factor (SF) which roughly measures the local evenness or oddness of a peak. Using profile analysis methods, thresholds to changes in these parameters (defined as deltaBWF/BWF and deltaSF) are measured together with the effects of several manipulations such as using different peak levels, varying spectral component densities, and randomizing the frequencies of the peaks. The new ripple analysis model accounts well for the measured thresholds. Predictions of the three previously published models for the same profiles are also evaluated and discussed.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1994
Accession Number
ADA453133

Entities

People

  • Shihab A. Shamma
  • Svetlana Vranic-sowers

Organizations

  • University of Maryland

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Availability
  • Bandwidth
  • Classification
  • Contracts
  • Detection
  • Electrical Engineering
  • Engineering
  • Frequency
  • Information Operations
  • Instructions
  • Maryland
  • Monitoring
  • Security
  • Sharpness
  • Universities

Readers

  • Computational Modeling and Simulation
  • Military Engineering.
  • Statistical inference.