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Mumbling: Macho or Morphology?

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Area of Science:

  • Speech science
  • Anatomy
  • Phonetics

Background:

  • Mumbling, a common male speech trait, may stem from smaller jaw openings.
  • Behavioral factors are often cited for sex-specific speech clarity differences.

Purpose of the Study:

  • To investigate anatomical reasons for smaller jaw openings in male speakers.
  • To explore sex-specific differences in jaw opening during speech production.

Main Methods:

  • Analysis of articulatory data for jaw opening in low vowels across American English and German speakers.
  • Examination of sex-specific differences and accent interactions.
  • Articulatory modeling to compare male and female jaw-opening settings.

Main Results:

  • Female speakers exhibited greater jaw openings, especially in accented speech.
  • Modeling revealed that similar jaw settings caused pharyngeal constriction differences between male and female models.
  • Complete radico-pharyngeal closure occurred in the male model with similar settings.

Conclusions:

  • Empirical and modeling data suggest a physiological basis for sex-specific speech clarity differences in low vowels.
  • Anatomical variations in jaw opening may contribute to speech production differences between sexes.