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Spectral distribution of prosodic information

K W Grant1, B E Walden

  • 1Walter Reed Army Medical Center, Washington, DC, USA.

Journal of Speech and Hearing Research
|April 1, 1996
PubMed
Summary

Speech frequency regions critically impact prosody recognition. High frequencies aid syllable number and stress identification, while low frequencies assist intonation pattern recognition.

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Area of Science:

  • Auditory Neuroscience
  • Speech Perception
  • Acoustic Phonetics

Background:

  • Prosodic speech cues (rhythm, stress, intonation) rely on intensity, duration, and fundamental frequency variations.
  • These temporal speech properties are distributed across the auditory spectrum.
  • Understanding frequency-specific contributions is key to speech recognition models.

Purpose of the Study:

  • To investigate the relative importance of different speech frequency regions for recognizing prosodic cues.
  • To evaluate the identification of syllable number, syllabic stress, sentence intonation, and phrase boundary location under filtered conditions.

Main Methods:

  • Normally hearing subjects identified prosodic features under six frequency filter conditions (200-6100 Hz).
  • Each filter condition maintained equal articulation index (AI) weights.
  • Performance was assessed across different spectral bands to determine feature-specific frequency dependencies.

Main Results:

  • Significant interaction observed between filter conditions and the identification of specific prosodic features.
  • High-frequency speech information proved crucial for syllable number and stress recognition.
  • Low-frequency speech information was beneficial for identifying intonation patterns.

Conclusions:

  • Spectral characteristics of speech differentially contribute to the perception of various prosodic features.
  • Despite spectral differences, listeners demonstrated robust overall prosodic pattern recognition.
  • Results inform models of auditory and auditory-visual speech recognition.

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