An acoustic analysis of pathological voice and its application to the evaluation of laryngeal pathology

Speech and language disorders secondary to diffuse subcortical vascular lesions: Neurolinguistic and acoustic analysis. A case report

“…Normalized Noise Energy (NNE) is a measure of the turbulent noise energy produced during vocalization and is obtained by subtracting harmonic signal energy from total vocal energy. NNE may be more sensitive than HNR (ratio of harmonic-to-noise energy) in detecting the presence of glottal noise, and therefore more useful in discriminating pathological voices from normal voices [20,21]. F0 and Amplitude Tremor refer to a 1-15 Hz modulation of a cyclic parameter (frequency or amplitude) from the voice signal, either of a neurologic origin or an interaction between neurological and biomechanical properties of the vocal fold.…”

Voice-quality Abnormalities as a Sign of Dysphagia: Validation against Acoustic and Videofluoroscopic Data

“…Acoustic measures are known to differentiate people with and without unilateral vocal fold paralysis [14] and it is reasonable to expect that the presence of aspirated material in the vicinity of the vocal folds might disrupt vibration and increase aperiodicity [7]. Ryu et al [6] performed blinded acoustic analyses (using Visi-Pitch software) of 3-s sustained /a/ voice samples in 93 patients with dysphagia of varying etiology.…”

Objective Evaluation of the Human Voice: Clinical Aspects

“…Pa tients' voices were recorded on a tape and the taperecorded voice samples were acoustically analyzed. In the present study, the sustained vowel /e/ was ana lyzed by means of the Voice Evaluation System SH-10 (Rion) that was originally developed by Kasuya et al [8] and Kikuchi et al [9]. With this system, the pitch period perturbation quotient (PPQ).…”