The STI (speech transmission index) and SII (speech intelligibility index) are the two primary objective rating metrics for speech intelligibility. The differences between their calculation models and measured data are examined in this study, and the results show that there is no fundamental difference between them, except those caused due to the different calculation models. Therefore, both ST...

OBJECTIVE This study examined longitudinal change in speech intelligibility, vowel space, and word duration over 18 months among children with cerebral palsy (CP) who varied in the severity of their speech motor involvement. The study also examined relationships among variables at each time point. METHOD Twenty-two children with CP participated in the study (mean age = 50 months at the first ...

UNLABELLED The intelligibility of conversational speech produced by six children fitted with cochlear implants before age 3 years was measured longitudinally. Samples were obtained every 3 months during periods of 12-21 months. Intelligibility was measured using both an utterance-by-utterance approach and an approach to the sample as a whole. Statistically significant differences were observed ...

PURPOSE Speech acoustic characteristics of children with cerebral palsy (CP) were examined with a multiple speech subsystems approach; speech intelligibility was evaluated using a prediction model in which acoustic measures were selected to represent three speech subsystems. METHOD Nine acoustic variables reflecting different subsystems, and speech intelligibility, were measured in 22 childre...

BACKGROUND Changes to spoken communication are inevitable in Parkinson's disease (PD). It remains unclear what consequences changes have for intelligibility of speech. AIMS To establish the prevalence of impaired speech intelligibility in people with PD and the relationship of intelligibility decline to indicators of disease progression. METHODS 125 speakers with PD and age matched unaffect...

This report describes a method of speech modification to improve the intelligibility of speech. The spectral energy is reallocated by maintaining and emphasizing acoustical features important for speech perception. The method consists of three components: flattening of the spectral tilt, enhancement of the spectral contrast, and holding of the low-frequency region. The results of this speech in...