Multiple bursts in non-native and native English: Evidence from twelve L1s

Voiceless plosives are frequently produced with multiple bursts (MBs), a phenomenon that has substantial implications for voice onset time measurement (VOT) of these consonants. MBs have been noted in previous research, but have not been systematically quantified. The objective of this study was to analyze MBs in non-native English (with data from twelve first languages) and native English, and to discern the effect of MBs on VOT measurement. Further, the potential effects of place of articulation (PoA), gender, speech rate, and age on MBs were explored. Results showed that VOT measurement method in the presence of MBs had a significant effect on the VOT values obtained for the plosives. In addition, MBs were influenced to a large extent by PoA, but not by gender, speech rate, or age. Comparisons between non-native English and native English revealed some significant differences, but in both varieties the analyses of MBs showed overall similar tendencies.