The effect of speaking rate on supersegmentals: An acoustic and perceptual analysis

Abstract

Rate manipulation has been used to study change in prosodic contrasts such as emphatic stress. Timing contrasts in stressed words are reduced or eliminated when speaking rate is increased. However, reports of intonation and rate change are mixed. Some studies have reported an increase of F0 movement [M. Steppling and A. Montgomery, J. Phonetics 64, 451–461 (2002)], and other reports have found that F0 movement is decreased at faster speaking rates [C. Fougeron and S. Jun, Percept. Psychophys. 26, 45–69 (1998)]. This study examined the effect of speaking rate on F0 and duration in sentences produced with emphatic stress in different sentential position and in declarative and interrogative forms. Essentially, durational contrasts were reduced at faster speaking rates and were more pronounced at slower speaking rates. Intonation, on the other hand, was more pronounced for the fast rate and somewhat reduced for the slow rate. A perceptual component will also be reported that examines a listener’s ability to recognize stressed words and mode of sentence production (declarative and interrogative) at different speaking rates.