Caught in the ACT: the timing of aspiration and voicing in East Bengali.

East Bengali is a language that displays a four-way contrast of voiced/voiceless and aspirated/unaspirated oral stops and affricates in all word positions. Additionally, in intervocalic position there is a quantity contrast between long and short obstruents. In this production study we investigate medial palato-alveolar affricates and stops at the labial, dental, retroflex, and velar places of articulation and address the problems of VOT measurements. We introduce a different approach of measuring lag times, henceforth called after closure time (ACT). The results show that this approach can do away with the extra notion of breathy voice to distinguish between the voiced aspirates and unaspirates. Moreover, as a result of analyzing the aspirated stops and affricates, an additional term (superimposed aspiration -SA) had to be introduced. The results of combining the notions of ACT and SA show that aspiration, measured from the point of release, is timed equally for voiced and voiceless stops. However, the difference in voice emerges in a trade-off relationship between ACT and SA. The factors used for analysis were voice, aspiration, quantity, and place of articulation in correlation to closure duration, the length of the preceding vowel, ACT, and SA.