Date of Award


Degree Name

Master of Arts


Speech, Language and Hearing Sciences


Speech Pathology and Audiology

First Advisor

Dr. Robert Erickson

Second Advisor

Dr. Gary Lawson

Third Advisor

Dr. James Hillenbrand

Access Setting

Masters Thesis-Open Access


Recordings were made of seven normal female and eight normal male talkers producing sustained vowels under normal, moderately breathy, and very breathy conditions. Twenty listeners judged the recorded vowel tokens for degree of breathiness using a direct magnitude estimation procedure. A Cronbach coefficient alpha revealed strong intrasubject agreement.

Several acoustic analyses were evaluated by measuring their correlations with the mean of the listeners' breathiness ratings. Measures of cepstral peak prominence in band limited signals were most strongly correlated with perceived breathiness. The height of the autocorrelation peak in highpass filtered signals and the relative amplitude of the first harmonic were also found to correlate with perceived breathiness.