Comparison of the Effects of Broad-Band Noise on Speech Intelligibility and Voice Quality Ratings

摘要

Results of a study of effects of broad-band noise on speech intelligibility and voice quality are presented, with a comparison of three methods for evaluating speech signals: the Diagnostic Rhyme Test (DRT) for speech intelligibility, the Diagnostic Acceptability Measure (DAM) test for voice quality and acceptability, and the Mean Opinion Score (MOS), also for evaluating speech quality and acceptability. Speech samples were combined with broad-band noise, with accurate calibration of speech-to-noise energy ratios by using a new measurements algorithm developed under RADC sponsorship. Four scrambling (randomizations) of the Diagnostic Rhyme Test were prepared with each of three male speakers, for assessing speech intelligibility. Connected speech samples from the three speakers were prepared for assessing voice quality and acceptability. The processed speech samples were digitally recorded for subsequent presentation to listener crews. (Author)