Overpressure and breathiness in spastic dysphonia. An acoustic (LTAS) and perceptual study.
Pre- and postsurgical speech segments spoken by patients with spastic dysphonia were submitted to long-time-average-spectrum (LTAS) analysis and for perceptual assessment of breathiness and overpressure. Breathy phonation corresponded to a steep fall in the LTAS, while overpressured phonation produced higher spectral levels and a less steep fall. Mixed breathy-overpressured phonation produced a somewhat elevated spectrum. Post-surgical changes in overpressure are demonstrated by spectral shifts. Perceptual scores correlated well with the objective acoustic spectral measures.
D003201:Computers; D005260:Female; D006801:Humans; D008297:Male; D010699:Phonation; D013067:Speech Perception; D014831:Voice; D014832:Voice Disorders / Q000503:physiopathology* / Q000601:surgery; D014833:Voice Quality