Title page for ETD etd-10102009-020029

Type of Document Master's Thesis
Author Liberti, Joseph C.
URN etd-10102009-020029
Title Evaluation of several techniques for enhancing speech degraded by additive noise in mobile radio environments
Degree Master of Science
Department Electrical Engineering
Advisory Committee
Advisor Name Title
No Advisors Found
  • Intelligibility ofSpeech
Date of Defense 1991-05-05
Availability restricted

This thesis presents a study of several algorithms for enhancing speech degraded by additive noise in mobile cellular communications. The primary goal of this multi-stage study was to examine adaptive noise cancellation techniques in which one microphone is used to measure the speech plus noise signal and another microphone is used to form an estimate of the interfering background noise.

The first stage of this research project involved the design and operation of a measurement system to gather dual channel audio samples in mobile radio environments for use in testing adaptive noise cancellation algorithms developed at Northeastern University. In the second phase of this research, several adaptive algorithms were used to implement noise cancellation systems which were applied to the measured speech signals. In the third phase of this research, several of the adaptive noise cancellation algorithms are compared and additional speech enhancement techniques are investigated.

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