Teflon Laryngoplasty: An Acoustical and Perceptual Study A 61-year-old male with a 24-year history of unilateral vocal fold paralysis was evaluated by a speech-language pathologist and an otolaryngologist for 52 weeks following Teflon injection. Tape recordings of the patient’s voice were obtained one week prior to and one, eight, 20, and 52 weeks subsequent to Teflon injection. ... Articles
Articles  |   November 01, 1978
Teflon Laryngoplasty: An Acoustical and Perceptual Study
 
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Article Information
Articles   |   November 01, 1978
Teflon Laryngoplasty: An Acoustical and Perceptual Study
Journal of Speech and Hearing Disorders, November 1978, Vol. 43, 496-505. doi:10.1044/jshd.4304.496
History: Received July 20, 1977 , Accepted June 27, 1978
 
Journal of Speech and Hearing Disorders, November 1978, Vol. 43, 496-505. doi:10.1044/jshd.4304.496
History: Received July 20, 1977; Accepted June 27, 1978

A 61-year-old male with a 24-year history of unilateral vocal fold paralysis was evaluated by a speech-language pathologist and an otolaryngologist for 52 weeks following Teflon injection. Tape recordings of the patient’s voice were obtained one week prior to and one, eight, 20, and 52 weeks subsequent to Teflon injection. The recorded samples were presented in the backward-play mode to a panel of speech-language pathology graduate students to obtain ratings of the degree of hoarseness, roughness, and pleasantness. Results of the perceptual aspect of this study revealed a general reduction in perceived hoarseness and an enhancement of perceived pleasantness following Teflon injection. Measurement of selected acoustic properties revealed a lowering of median fundamental frequency, a reduction of fundamental aperiodicity for isolated but not excerpted vowels, an elimination of certain frictional noise components, and an increase of certain harmonic components following Teflon injection.

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