TY - JOUR
T1 - Variability in the relationships among voice quality, harmonic amplitudes, open quotient, and glottal area waveform shape in sustained phonation
AU - Kreiman, Jody
AU - Shue, Yen Liang
AU - Chen, Gang
AU - Iseli, Markus
AU - Gerratt, Bruce R.
AU - Neubauer, Juergen
AU - Alwan, Abeer
N1 - Funding Information:
This research was supported in part by Grant No. DC01797 from the National Institutes of Health (NIDCD) and by Grant Nos. BCS-0720304 and IIS-1018863 from the National Science Foundation. The speech synthesizer was written by Norma Antoñanzas-Barroso, who also assisted with acoustic analyses. 1
PY - 2012/10
Y1 - 2012/10
N2 - Increases in open quotient are widely assumed to cause changes in the amplitude of the first harmonic relative to the second (H1*-H2*), which in turn correspond to increases in perceived vocal breathiness. Empirical support for these assumptions is rather limited, and reported relationships among these three descriptive levels have been variable. This study examined the empirical relationship among H1*-H2*, the glottal open quotient (OQ), and glottal area waveform skewness, measured synchronously from audio recordings and high-speed video images of the larynges of six phonetically knowledgeable, vocally healthy speakers who varied fundamental frequency and voice qualities quasi-orthogonally. Across speakers and voice qualities, OQ, the asymmetry coefficient, and fundamental frequency accounted for an average of 74% of the variance in H1*-H2*. However, analyses of individual speakers showed large differences in the strategies used to produce the same intended voice qualities. Thus, H1*-H2* can be predicted with good overall accuracy, but its relationship to phonatory characteristics appears to be speaker dependent.
AB - Increases in open quotient are widely assumed to cause changes in the amplitude of the first harmonic relative to the second (H1*-H2*), which in turn correspond to increases in perceived vocal breathiness. Empirical support for these assumptions is rather limited, and reported relationships among these three descriptive levels have been variable. This study examined the empirical relationship among H1*-H2*, the glottal open quotient (OQ), and glottal area waveform skewness, measured synchronously from audio recordings and high-speed video images of the larynges of six phonetically knowledgeable, vocally healthy speakers who varied fundamental frequency and voice qualities quasi-orthogonally. Across speakers and voice qualities, OQ, the asymmetry coefficient, and fundamental frequency accounted for an average of 74% of the variance in H1*-H2*. However, analyses of individual speakers showed large differences in the strategies used to produce the same intended voice qualities. Thus, H1*-H2* can be predicted with good overall accuracy, but its relationship to phonatory characteristics appears to be speaker dependent.
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U2 - 10.1121/1.4747007
DO - 10.1121/1.4747007
M3 - Article
C2 - 23039455
AN - SCOPUS:84867386067
SN - 0001-4966
VL - 132
SP - 2625
EP - 2632
JO - Journal of the Acoustical Society of America
JF - Journal of the Acoustical Society of America
IS - 4
ER -