Speech Prosodics

Speech prosodics refers to the nonverbal acoustic features of speech that convey meaning beyond the words themselves, including pitch (fundamental frequency), rhythm, stress, intonation patterns, pausing, and speaking rate. In accessibility research, prosodic analysis serves as an objective measure of cognitive load — when users are under greater cognitive burden, their speech shows measurable changes such as increased hesitation pauses, altered pitch range, and modified intonation patterns. Prosodic features are also important in text-to-speech synthesis, where natural-sounding prosody improves comprehension for screen reader users, and in speech recognition, where cognitively loaded speech patterns can increase recognition errors.