Effects of Vocal Intensity and Vowel Type on Cepstral Analysis of Voice

摘要: Summary Objectives/Hypothesis The purpose of this study was to specifically examine the effects vocal loudness/intensity condition and vowel type on cepstral analysis measurements. Study Design Experimental, mixed design. Methods Sustained samples /i/, /ɑ/, /u/, /ae/ were elicited from 92 healthy male female subjects between ages 18 30 years at three different loudness conditions: (1) "Comfortable pitch loudness," (2) "As softly as possible without whispering," (3) loudly possible, screaming/straining voice or tensing neck region." Recordings made using a calibrated headset microphone digitized computer. Vowel analyzed for intensity (decibels), fundamental frequency (F 0 in Hertzz), relative amplitude smoothed peak prominence (CPPs decibels). Results Significant main (with significant increase CPPs quiet comfortable loud voice) gender (males having significantly greater mean than females) observed. In addition, results indicated that had effect CPP (greater low vowels [/ɑ/ /ae/] vs high [/i/ /u/]). Conclusions indicate both elicitation should be monitored closely research clinical situations. Changes mode phonation, well supraglottal changes tract resonances intensity, appear combine result substantial differences conditions types. These separate norms are necessary type, gender, when tool.