In the analysis of speech production, glottal inverse filtering has proved to be an effective yet non-invasive method for obtaining information about the voice source. One of the main challenges of the existing methods is blind estimation of the contribution of the lip radiation, which must often be manually determined. To obtain a fully automatic system, we propose an automatic method for determining the lip radiation parameter. Our method is based on a physically-motivated quality criteria for the glottal flow, which can be approximated by minimization of the norm-1. Experiments show that the parameters obtained by the automatic method are mostly within the 95% confidence intervals of the mean values obtained by manual tuning by experts.
Bibliographic reference. Airaksinen, Manu / Bäckström, Tom / Alku, Paavo (2014): "Automatic estimation of the lip radiation effect in glottal inverse filtering", In INTERSPEECH-2014, 398-402.