title: The effects of feedback filtering on nasalization in normal and hypernasal speakers.
abstract: Two groups of subjects, one with normal speech and one with hypernasal speech, spoke while hearing their voices unfiltered, low-pass filtered with cut-off frequencies of 1000, 500, and 300 Hz and high-pass filtered with cut-off frequencies of 500, 1000, and 2000 Hz. Measurements of nasalization were made with a miniature accelerometer attached to the side of the subject's nose. Both groups of subjects decreased nasalization when hearing their voices low-pass filtered with a cut-off frequency of 300 Hz. This decrease was statistically significant. The results were interpreted as supporting the hypothesis that nasalization is under feedback control.
mesh_terms: D001307:Auditory Perception / Q000502:physiology*; D005246:Feedback; D005260:Female; D005374:Filtration; D006801:Humans; D008297:Male; D008722:Methods; D009666:Nose / Q000502:physiology*; D013060:Speech / Q000502:physiology; D013061:Speech Acoustics; D013064:Speech Disorders / Q000503:physiopathology; D014831:Voice; D014832:Voice Disorders / Q000503:physiopathology*