Accession Number:

ADA238023

Title:

Auditory Processing of Complex Sounds Across Frequency Channels

Descriptive Note:

Annual technical rept. 1 May 1990-1 May 1991,

Corporate Author:

LOYOLA UNIV OF CHICAGO IL PARMLY HEARING INST

Report Date:

1991-05-31

Pagination or Media Count:

8.0

Abstract:

Our work has centered on the discovery of the MDI or Modulation Detection Interference phenomenon, in which the modulation properties of tonal components in multi-tone complexes can not be processed when all the tones are modulated at the same low modulation rate as well as when the tones are not modulated or when the modulation rates differ for different components. We have argued that MDI results from the fact that the coherent modulation of all of the components fuse them into a single auditory image, and since coherent modulation was the basis of the perceptual fusion, temporal modulation for any one tone is not easily processed. We recently tested a corollary to this assumption. That is, when tonal complexes are fused into an auditory image based on coherent temporal modulation and MDI occurs, can subjects still process other attributes of the tones e.g. changes in frequency and intensity since these other attributes were not the basis for the tones being fused into a single image.

Subject Categories:

  • Anatomy and Physiology
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE