There has been considerable amount of work done in exploring the acoustic correlates of nasalized and non-nasalized vowels in the frequency domain. Nasalized vowels are characterized by the presence of extra pole-zero pairs near the first formant region and across the spectrum. Several other automatically extractable acoustic features have been proposed by researchers across the globe. This area has not been explored much in the temporal domain. In this study we have tried to find quantifiable differences/similarities between the nasal and non-nasal vowel /a/ in the temporal domain at the pitch synchronous level. The results show significant differences between nasalized and non-nasalized vowel /a/.