Analysis of glottal stops in speech signals
B. Yegnanarayana, Suresh Rajendran, Hussien Seid Worku, N. Dhananjaya · 2008
During production of glottal stops the glottal vibration has un-equal cycles and is caused by laryngealization. While one can perceive the features of laryngealization in the speech, it is dif-ficult to analyse the signal to detect these source features from the standard spectrum-based analysis methods. In this paper we propose methods to extract the voice source vibration charac-teristics, and show that in the region of glottal stop, the pitch periods will be irregular, and the crosscorrelation coefficient of the signal in successive pitch periods will be low. This analy-sis enable us to locate the regions of glottal stops in continuous speech, and also help us to study the characteristics of creaky voice. Index Terms: glottal stop, laryngealization, creaky voice, glot-tal vibration, voice source, pitch period.