Voice source features for forensic voice comparison - an evaluation of the GLOTTEX software package

GLOTTEX R ⃝ is a software package which extracts information about voice source properties, including estimates of properties related to physical structures of the vocal folds. It has been proposed that the output of GLOTTEX R ⃝ can be used as part of a forensic-voice-comparison system. We test this using manually labeled segments from a database of voice recordings of 60 female Chinese speakers. Performance was assessed relative to a baseline MFCC GMM-UBM system. GMM-UBM systems based on features extracted by GLOTTEX R ⃝ were combined with the baseline system using logistic-regression fusion. System performance was assessed in three channel conditions: high-quality v high-quality, mobile-to-landline v mobileto-landline, and mobile-to-landline v high-quality. Substantial improvements over the baseline system were not observed.