Statistical quantities computed from the current normal (symmetric) laryngeal model compared to typical ranges reported by previous studies. F0 is the fundamental frequency; and are the peak and mean glottal flow rate, respectively; is the open quotient, defined as , where is the duration of glottal open phase; is the skewness quotient, defined as where is the duration of the glottal acceleration phase and is the duration of the glottal deceleration phase.