Effectiveness of Recurrence Quantification Measures in Discriminating Subjects With and Without Voice Disorders.

The objective of this study was to analyze the accuracy of recurrence quantification measurements (RQMs) in discriminating between individuals with and without voice disorders. This study consisted of a total of 541 recorded voice samples from normal and dysphonic subjects. All subjects recorded a sustained vowel /Ɛ/ and underwent a laryngoscopic examination of the larynx.

Acoustic assessment of the voices of children using nonlinear analysis: proposal for assessment and vocal monitoring.

Objective: To analyze the accuracy of recurrence measurements, both isolated and combined, to assess the intensity of vocal disorders in children.

Method: A total of 93 children of both sexes (48 girls and 45 boys), aged between 3 and 10 years, participated. The vocal-deviation intensity was evaluated by the consensus of three speech therapists from the pronunciation of vowel /ε/ using the visual analog scale.