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[The objective evaluation of sibilants].
1Medizinische Hochschule Hannover, Klinik für Phoniatrie und Pädaudiologie, Hannover.
Laryngo- Rhino- Otologie
|June 11, 2011
Summary
Spectral analysis of sibilants, the most common speech disorder, is crucial. Varying analysis windows significantly impact results, highlighting the need for consistent parameters in clinical practice.
Area of Science:
- Speech-language pathology
- Acoustic phonetics
- Signal processing
Context:
- Sibilant sound errors are the most frequent speech disorder.
- Objective analysis of speech sound production is essential for diagnosis and treatment.
- Spectral analysis offers a valuable, accessible tool for evaluating speech sounds.
Purpose:
- To investigate the influence of different spectral analysis protocols on the evaluation of sibilant sound production.
- To assess the impact of varying time and frequency window selections on spectral moment calculations.
- To provide recommendations for standardized spectral analysis of sibilants in clinical settings.
Summary:
- Sibilants exhibit band-pass noise characteristics, analyzed using power spectral density functions and spectral moments.
- The study found that different time and frequency analysis windows yield varying results in spectral analysis of sibilants.
- No universal gold standard exists for sibilant spectral analysis, but consistent parameters are vital.
Impact:
- Highlights the critical need for standardized protocols in spectral analysis of speech sounds.
- Recommends specific parameters (e.g., 40ms time window) for clinical application to ensure reliable pre- and post-therapy comparisons.
- Aids clinicians in achieving objective and reproducible assessments of sibilant disorders.
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