1. Current developments in phonetics Louis C.W. Pols Institute of Phonetic Sciences (IFA) Amsterdam Center for Language and Communication (ACLC)

7. Banquet Eurospeech95, Madrid E’95 chairman ESCA-medalist ESCA president J.M. Pardo Ken Stevens Mrs. Pardo Louis Pols

10. DL for short speech-like transitions Adopted from van Wieringen & Pols (1998), Acta Acustica 84, 520-528 “ Discrimination of short and rapid speechlike transitions” complex simple short longer trans. initial final

16. Perceptual undershoot Net shift in vowel responses to tokens with curved formant tracks vs. stationary tokens. All values significant, except small open triangles

19. Error rates of vowel identification for the individual stimulus token types. Long-short vowel errors (/ α-a:, -o:/) are ignored c

24. Stylized formant contour c 2 c 1 F 2 (t) = c 0 + c 1 t + c 2 t 2 (second order polynomial) F 2 (t) = F 2 (t) + α 2 p (t) + β 2 t (t) + γ 2 α (t) for @ in /p@t α/ F 2 (-1) = 1352 Hz ; F 2 (0) = 1435 Hz; F 2 (1)=1485 Hz F 2 normalized time -1 F center (c 0 ) F offset 0 1 F onset

25. Schwa realization The schwa is not just a centralized vowel but something that is completely assimilated with its phonemic context

26. Human word intelligibility vs. noise from Ph.D thesis H. Steeneken (1992) ‘ On measuring and predicting speech intelligibility’

28. Freq. effects vs. vowel reduction Dutch Finnish Russian -0,100 -0,050 0,000 0,050 0,100 0,150 0,200 0,250 0,300 Duration F12Dist CoG Intensity Correlation Coefficient -> R read speech spontaneous speech -log 2 (word frequency) vs. acoustic vowel reduction (in terms of duration, F1F2Dist, CoG, and Intensity) for Du, Fi, Ru Dutch Finnish Russian 0,000 0,050 0,100 0,150 0,200 0,250 0,300 Duration F12Dist CoG Intensity Correlation Coefficient -> R

30. Early speech development vBeinum, Clement, vdDikkenberg, Developmental Sc. 4, 61-70 (2001) average onset (in weeks) Stage I Stage II Stage III Stage IV Stage V (babbling) Stage VI (‘words’) 0 6 10 20 31 40

31. Tracheoesophageal speech C. van As, Ph.D thesis (2001)

34. Spectral measurements normal hearing child 5 & 24 mo. hearing-impaired child 5 & 24 mo. i u a