Abstract
This paper describes the various differences in acoustic parameters of geminate, nongeminate, and cluster sounds of Hindi, which can be used for their perceptual distinction. Words containing these sounds were synthesized using a PC-based Klatt synthesizer, which uses a set of about 60 parameters. For distinction between geminate and nongeminate sounds, the parameters such as duration of the plosive gap and preceding vowel, and the formant frequencies and intensity of the burst are important but the closure duration plays the most significant role. This difference is of the order of 1:1.5. However, if the closure duration is reduced to 50% or less, the unvoiced sounds are perceived as voiced sounds. In the case of the cluster (-C1C2-) words containing stop consonants, when C1 and C2 have the different places of articulation, a burst is observed in the middle of the closure. It was found that this burst has no perceptual effect when it was moved to the left and right positions adjacent to the vowels. Even the removal of the burst has no perceptual effect.
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