Investigation of a glottal related harmonics-to-noise ratio and spectral tilt as indicators of glottal noise in synthesized and human voice signals.
Murphy PJ, McGuigan KG, Walsh M, Colreavy M. Investigation of a glottal related harmonics-to-noise ratio and spectral tilt as indicators of glottal noise in synthesized and human voice signals. J Acoust Soc Am. 2008 Mar; 123(3):1642-52.