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[Cepstrum analysis in voice disorders]

K Zieger1, C Schneider, G Gerull

  • 1Hals-Nasen-Ohren-Klinik und Poliklinik, Klinikum Rudolf Virchow, Freie Universität Berlin, Deutschland.

Folia Phoniatrica Et Logopaedica : Official Organ of the International Association of Logopedics and Phoniatrics (IALP)
|January 1, 1995
PubMed
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Cepstrum analysis offers a distinct method for voice disturbance assessment, separating vocal tract filter functions from glottal pitch. While it shows significant differences in hoarseness degrees, it requires further development for precise differentiation of specific vocal issues.

Area of Science:

  • Laryngology
  • Acoustic analysis
  • Speech science

Background:

  • Objective voice assessment is crucial for tracking voice disturbances.
  • Existing electroacoustic methods like formant analysis, autocorrelation, and inverse filtering remain experimental.
  • Cepstrum analysis is proposed as a novel method for voice analysis.

Observation:

  • 112 normal and hoarse voices were analyzed using cepstrum analysis.
  • The method separates glottal pitch from the vocal tract's filter function.
  • Cepstrum analysis was applied to assess different degrees of hoarseness (0-3).

Findings:

  • A significant difference was observed in the sum of amplitudes of the first cepstral pitch peaks between varying degrees of hoarseness.
  • The cepstrum analysis method showed potential in distinguishing between normal and hoarse voices.

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  • The current state of the method could not sufficiently differentiate specific disturbances causing hoarseness.

    • Implications:

    • Cepstrum analysis provides a promising, reproducible procedure for voice disturbance assessment.
    • Further refinement of cepstrum analysis may enhance its diagnostic capabilities for specific vocal pathologies.
    • This method could advance objective comparisons in voice research and clinical practice.