Comparing the information conveyed by envelope modulation for speech intelligibility, speech quality, and music quality

摘要: This paper uses mutual information to quantify the relationship between envelope modulation fidelity and perceptual responses. Data from several previous experiments that measured speech intelligibility, quality, music quality are evaluated for normal-hearing hearing-impaired listeners. A model of auditory periphery is used generate signals, calculated using normalized cross-covariance degraded signal with a reference signal. Two procedures describe modulation: (1) within each frequency band (2) spectro-temporal processing analyzes spectral ripple components fit successive short-time spectra. The results indicate low rates provide highest while high quality. low-to-mid frequencies most important mid Differences analysis were not significant in five six experimental conditions evaluated. different modulation-rate auditory-frequency weights may be appropriate indices designed predict types relationships.