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Related Experiment Videos

Prominence lent by rising and falling pitch movements: Testing two models

H H Rump1, D J Hermes

  • 1Institute for Perception Research/IPO, Eindhoven, The Netherlands.

The Journal of the Acoustical Society of America
|August 1, 1996
PubMed
Summary

This study tested a pitch-level difference (PLD) model for speech prominence. Findings suggest that while pitch differences influence prominence, lower pitch levels may contribute less than higher ones.

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Area of Science:

  • Phonetics
  • Speech Perception
  • Acoustic Phonetics

Background:

  • The pitch-level difference (PLD) model posits that perceived speech prominence correlates with pitch differences between syllables.
  • Previous research established the PLD model's foundational principles for prominence perception.

Purpose of the Study:

  • To further test the validity of the PLD model for speech prominence perception.
  • To investigate the influence of temporal modifications and varying pitch contours on prominence perception.

Main Methods:

  • Two experiments were conducted to assess the PLD model's predictions.
  • Experiment I evaluated the impact of time stretching and compression on prominence perception.
  • Experiment II tested an alternative model focusing on pitch contour declination lines.

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Main Results:

  • Experiment I revealed that temporal modifications partially deviated from the PLD model's predictions.
  • Results from Experiment II indicated that prominence perception was influenced by both upper and lower pitch declination lines.
  • The data suggested a nuanced role for low pitch levels in prominence perception, potentially lesser than high pitch levels.

Conclusions:

  • The original PLD model requires refinement, as temporal stretching/compression affects prominence perception.
  • Pitch contour characteristics, particularly declination lines, play a significant role in perceived prominence.
  • Low pitch levels appear to have a diminished impact on prominence compared to high pitch levels, suggesting a non-linear relationship.