Perceptual, acoustic, and videostroboscopic evaluation of individuals with laryngopharyngeal reflux pre- and post-treatment

Date of Completion

January 2001


Speech Communication|Health Sciences, Speech Pathology




Thirteen subjects with laryngopharyngeal reflux (LPR) were studied pre- and post-treatment. The effect of treatment on perceptual ratings of voice quality, frequency and intensity measures, and videostroboscopic parameters relating to laryngeal appearance and function was examined. Relationships between perceptual, acoustic, and videostroboscopic parameters were assessed descriptively. Results showed a small, but significant improvement in the perception of voice quality post-treatment. No significant differences were found between pre- and post-treatment means for any of the acoustic measures except harmonics-to-noise ratio (HNR). The majority of subjects were rated as normal on 11 out of 16 videostroboscopic parameters pre-treatment. For the remaining 5 parameters, between 3 and 8 subjects were rated as abnormal pre-treatment; however, little improvement in laryngeal status was observed post-treatment. Based on descriptive analyses, perceptual and acoustic parameters were found to correspond more closely than perceptual and videostroboscopic ratings. ^