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This Thesis is brought to you for free and open access. It has been accepted for inclusion in Dissertations and Theses by an authorized administrator of PDXScholar. For more information, please contact pdxscholar@pdx.edu. Recommended Citation Phillips, Patsy J., "Effects of speaker-sex-difference on listeners' perception of vocal roughness in normal vowel productions" (1973). Dissertations and Theses. Paper 1731.