Perceptual weighting of acoustic cues to contrastive prosody for sentences in quiet and in noise

Prosody is used to mark important information in speech, yet despite this important role in everyday communication it is not a customary part of speech recognition testing in routine audiometry. Listeners might fail to perceive meaningful emphasis on a specific word signaled by prosodic cues despite repeating the words correctly. This study introduces a new paradigm for assessing perception of prosodic cues that are used to signify new/corrective information in a sentence. Stimuli consisted of spoken sentences where one word (in various sentence positions) was emphasized through acoustic modifications across the entire utterance, in a manner that corrected wrong information. Participants used a visual analog scale to mark the timing and degree of emphasis aligned with the target words. Perceptual data in this study are linked with acoustic measures of voice pitch contour, intensity, and duration to characterize how contrastive stress cues are recovered by listeners with and without cochlear implants, who are especially at risk for poorer pitch perception. Follow-up conditions used stimuli where acoustic cues (F0, duration, intensity) were manipulated independently to explore perceptual cue weighting, and the perseverance of these cues through background noise.