Date of Award
Fall 1984
Document Type
Thesis - Restricted
Degree Name
Master of Arts (MA)
Department
Electrical and Computer Engineering
First Advisor
Niederjohn, Russell
Second Advisor
Heinen, James
Third Advisor
Moeller, Arthur
Abstract
This thesis presents the results of three experiments which involve the transformation of zero-crossings. The first experiment entails the reordering, reversing and averaging of the zero-crossing intervals of differentiated speech. The second experiment involves the same three transformations, but the speech has now been band pass filtered prior to processing. The final experiment alters the zero-crossings by varying the sampling rate that is used to determine them. The results presented in this thesis do not support the use of zero-crossing analysis in speech processing systems. Reordering, reversing and averaging substantially decrease the intelligibility of the speech processed. The results from experiments involving these transformations suggest that zero-crossing locations play a significant role in determining the intelligibility of speech. This thesis also presents the results from an experiment which studied the effects of different methods for determining zero-crossings in combination with varying sampling rates. A roundoff method was found to be substantially better over a large frequency range than was the truncation method used in previous research.
Recommended Citation
Krutz, Michael W., "Zero-Crossing Transformations and Their Effect Upon Speech Intelligibility" (1984). Master's Theses (1922-2009) Access restricted to Marquette Campus. 5034.
https://epublications.marquette.edu/theses/5034