Acoustic effects of familiarity on speech.
Joel M. MacAuslan, Suzanne Boyce · The Journal of the Acoustical Society of America · 2009
In earlier work, we have reported subtle differences in acoustic measures of speech from 15 subjects who produced the Rainbow Passage at eight hour intervals over 36–42 hours of sleep deprivation. To determine whether results are due to sleep deprivation per se, or to the effect of increasing familiarity with the speech materials, we collected Rainbow Passage recordings from 15 subjects at eight hour intervals over three days while following their normal sleep/wake pattern. These data were subjected to the same measures (based on automatic detection of acoustic landmarks) as reported in our previous work. Results showed no consistent effect of familiarity with speech materials under these experimental conditions, supporting the contention that sleep deprivation affects speech articulation. [Work supported by NIH.]