The voice sample of 75 subjects with various voice qualities from normal to severely dysphonic
was evaluated by three expert evaluators twice by using both Kotby Modified GRBAS and Cape-V
Scale for assessment of the efficiency of both scales for assessment of voice quality. The inter and
intra ratter evaluation was done and acoustic and aerodynamic analysis was measured. There was
excellent correlation between both overall modified GRBAS grade and for CAPE-V severity grade
among total group and gender classification. The Interclass correlation coefficient was Good and
ranging from 0.878 to 0.949 for both scales. There are highly significant correlation of between the
subjective evaluation by using both scales with acoustic and aerodynamic analysis for jitter, shimmer,
and noise to harmonic ratio for vowel and maximum phonation time. Both scales are reliable, valid for
assessment of voice quality. Modified GRBAS is easer to present and Cape-V Scale is more sensitive
for evaluation of minimal change.