Monaural and Binaural Processing of Complex Waveforms
Abstract
During the past year of the granting period, we have continued to make substantial progress consistent with the objectives outlined in our latest proposal. (1) We have completed an extensive analysis of and succeeded in publishing a very comprehensive set of data concerning the amount of 'comodulation masking release' (CMR) that can be obtained when the coherent envelope information is presented successively rather than simultaneously. It was determined that 'off-frequency' information, such as that which usually produces a CMR, can provide only a very small release from masking when it is presented prior and subsequent to the temporal interval containing the signal. The most striking finding was that the threshold for detecting a 1-kHz tone masked by an 50-Hz-wide band of noise centered on 1 kHz, was reduced by 7 dB when an identical, 'on frequency', masking noise was presented in all four intervals of our two-cue, two-interval, forced-choice procedure. (2) We finished three other papers, one of which was published and two of which have been revised and resubmitted. (3) We are currently collecting data concerning how varying the forward fringe of a masker affects the magnitude of the binaural masking-level difference. The experiments are being conducted with low-frequency signals where the interaural cues are conveyed by the fine-structure of the waveform and with high-frequency signals where the interaural cues are conveyed via the envelope of the waveform.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 1993
- Accession Number
- ADA274209
Entities
People
- Constantine Trahiotis
- Leslie R. Bernstein
Organizations
- University of Connecticut Health Center