The Effect of Timbre, Pitch, and Vibrato on Vocal Pitch-Matching Accuracy
Journal of Voice (2016) Vol. 30, No. 3, pp. 378.e1-378.e12

This study seeks to examine how target stimulus timbre, vibrato, pitch, and singer classification affect pitch-matching accuracy. Source signals were synthesized with a source slope of -12 dB/octave with and without vibrato at each of the pitches, C4, B4, and ...

The Effect of Change in Spectral Slope and Formant Frequencies on the Perception of Loudness
Journal of Voice (2013) Vol. 27, No. 6, pp. 691-697

This study attempts to understand how changes in spectral slope and formant frequency influence changes in perceived loudness. It was hypothesized that voices synthesized with steeper spectral slopes will be perceived as less loud than voices synthesized with less steep ...