REPORT sanders-com-02-08/IDIAP Speech Processing & Text-Independent Automatic Person Verification Sanderson, Conrad EXTERNAL http://publications.idiap.ch/attachments/reports/2002/com02-08.pdf PUBLIC Idiap-Com-08-2002 2002 IDIAP In this communication we first review the human speech production process and feature extraction approaches commonly used in a speaker verification system. Experiments on the telephone speech {NTIMIT} database suggest that the performance degradation of a speaker verification system used in noisy conditions can be reduced by extending traditional feature vectors with recently proposed {MACV} features.