Harmonic-intensity analysis of normal and hoarse voices.
Objective evaluation of normal and hoarse voices is performed considering the characteristic that hoarse voices show a prominent fundamental frequency intensity compared with harmonics in the voice spectrum. The relative harmonic intensity Hr, obtained from a stable portion of the sustained vowel/a/, is defined as the intensity of the second and higher harmonics expressed as a percentage of the total voice intensity. Ninety-five percent of the normal voices examined have Hr larger than the critical value of 67.2%, whereas 90% of the hoarse voices have Hr smaller than the critical value. The harmonic-intensity analysis thus provides good discrimination between normal and hoarse voices.
D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006685:Hoarseness / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010700:Phonetics; D013018:Sound Spectrography; D013060:Speech; D013061:Speech Acoustics