title: Time series analysis of glottal airflow in normal and pathological phonation.
abstract: Time series analysis of glottal airflow was carried out on 26 normal controls and 40 patients with voice disorders, using a modification of Isshiki's original technique which uses a hot-wire flowmeter, taking cycle-by-cycle fluctuations into consideration. The mean flow rate and mean AC/DC were shown to have significant differences among normal and patient groups. The standard deviations of AC/DC and AC/DC perturbation were calculated from the AC/DC value of 50 cycles and shown not to vary significantly among the normal and patient groups. The relationship between AC/DC and perceptual impression of voice was also studied among 20 selected patients with breathy voices. Using Spearman's rank correlation coefficient, this relationship was found to have statistical significance (P < .05).
authors.affiliation: Ames Vocal Dynamics Laboratory, Department of Otolaryngology, Lenox Hill Hospital, New York, NY 10021.
authors.forename: K
authors.initials: K
authors.lastname: Shoji
authors.forename: Z
authors.initials: Z
authors.lastname: Mra
authors.forename: J D
authors.initials: JD
authors.lastname: Yu
authors.forename: S M
authors.initials: SM
authors.lastname: Blaugrund
authors.forename: N
authors.initials: N
authors.lastname: Isshiki
mesh_terms: D005931:Glottis / Q000502:physiology*; D006801:Humans; D012123:Pulmonary Ventilation / Q000502:physiology; D013068:Speech Production Measurement; D014826:Vocal Cord Paralysis / Q000175:diagnosis*; D014827:Vocal Cords / Q000503:physiopathology*; D014832:Voice Disorders / Q000175:diagnosis* / Q000503:physiopathology