Analysis of Voice Changes in Early-Stage Parkinson's Disease with AVQI and ABI: A Follow-up Study.

Objectives: The purpose of this pilot study was to examine voice quality changes in individuals with early-stage Parkinson's disease (PD) utilizing the Acoustic Voice Quality Index (AVQI) and Acoustic Breathiness Index (ABI) over approximately a 1-year period.

Study Design: Follow-up study.

Methods: Baseline and follow-up data were gathered from the PDSTUlong speech corpus.

Analysis of Voice in Parkinson's Disease Utilizing the Acoustic Voice Quality Index.

Objectives: The purpose of this study was to analyze the acoustic voice quality index (AVQI) in relation to perceptual analysis and disease stage in speakers with Parkinson's disease (PD).

Study Design: Cross-sectional study.

Methods: The following data were gathered from the Parkinson's Disease Speech corpus of Tampere University (PDSTU): prolonged vowels and reading samples from native Finnish speakers with PD (n = 34), speaker demographic information, and Hoehn and Yahr scale scores.

A comparative study of automatic vowel articulation index and auditory-perceptual assessments of speech intelligibility in Parkinson's disease.

Purpose: The purpose of this study was to analyse the relationship between automatic vowel articulation index (aVAI) and direct magnitude estimation (DME) among speakers with Parkinson's disease (PD) and healthy controls. We further analysed the potential of aVAI to serve as an objective measure of speech impairment in the clinical setting.

Method: Speech samples from native Finnish speakers were utilised.