@misc{WilliamsEscuderoGafos2018,
  author    = {Williams, Daniel and Escudero, Paola and Gafos, Adamantios I.},
  title     = {Perceptual sensitivity to spectral change in Australian English close front vowels},
  series = {19 th annual conference of the international speech communicaton association (INTERSPEECH 2018), VOLS 1-6: Speech research for emerging marjets in multilingual societies},
  journal   = {19 th annual conference of the international speech communicaton association (INTERSPEECH 2018), VOLS 1-6: Speech research for emerging marjets in multilingual societies},
  publisher = {ISCA-International Speech Communication Association},
  address   = {Baixas},
  isbn      = {978-1-5108-7221-9},
  issn      = {2308-457X},
  doi       = {10.21437/Interspeech.2018-2505},
  pages     = {1442 -- 1446},
  year      = {2018},
  abstract  = {Speech scientists have long noted that the qualities of naturally-produced vowels do not remain constant over their durations regardless of being nominally "monophthongs" or "diphthongs". Recent acoustic corpora show that there are consistent patterns of first (F1) and second (F2) formant frequency change across different vowel categories. The three Australian English (AusE) close front vowels /i:, 1, i/ provide a striking example: while their midpoint or mean F1 and F2 frequencies are virtually identical, their spectral change patterns distinctly differ. The results indicate that, despite the distinct patterns of spectral change of AusE /i:, i, la/ in production, its perceptual relevance is not uniform, but rather vowel-category dependent.},
  language  = {en}
}
@article{WilliamsEscuderoGafos2018,
  author    = {Williams, Daniel Philip and Escudero, Paola and Gafos, Adamantios I.},
  title     = {Spectral change and duration as cues in Australian English listeners' front vowel categorization},
  series = {The journal of the Acoustical Society of America},
  volume    = {144},
  journal   = {The journal of the Acoustical Society of America},
  number    = {3},
  publisher = {American Institute of Physics},
  address   = {Melville},
  issn      = {0001-4966},
  doi       = {10.1121/1.5055019},
  pages     = {EL215 -- EL221},
  year      = {2018},
  abstract  = {Australian English /iː/, /ɪ/, and /ɪə/ exhibit almost identical average first (F1) and second (F2) formant frequencies and differ in duration and vowel inherent spectral change (VISC). The cues of duration, F1 × F2 trajectory direction (TD) and trajectory length (TL) were assessed in listeners' categorization of /iː/ and /ɪə/ compared to /ɪ/. Duration was important for distinguishing both /iː/ and /ɪə/ from /ɪ/. TD and TL were important for categorizing /iː/ versus /ɪ/, whereas only TL was important for /ɪə/ versus /ɪ/. Finally, listeners' use of duration and VISC was not mutually affected for either vowel compared to /ɪ/.},
  language  = {en}
}