Differential effects of speech prostheses in glossectomized patients.

Five patients representing different categories of glossal resection were fitted with prostheses specifically designed to improve speech. Speech recordings made for subjects with and without their prostheses were subjected to a variety of analyses. Prosthetic influence on listeners' judgments of severity level/intelligibility, number of consonants in error, and on the acoustic measure F2 range of vowels was evaluated. Findings indicated that all subjects demonstrated improvement on the speech measures. However, the extent of improvement on each measure varied across speakers and resection categories. Implications of the findings for prosthetic speech rehabilitation in this population are discussed.