Our research activities mainly focus on human auditory perception and cognition.

Here are some recent research topics.

  • Multilingual comparison of perception of locally time-reversed speech.
  • Irrelevant speech effect, investigated with noise-vocoded speech in German and Japanese.
  • Intelligibility of noise-vocoded speech.
  • Multivariate analysis of speech in mutiple languages.
  • Pitch, timbre, and time perception is also included in the research topics.

Some sound demonstrations about the above research topics are on the Gallery page.

Publications in refereed journals from 2010.

  • Ueda, K., Araki, T., and Nakajima, Y. (in press). Frequency specificity of amplitude envelope patterns in noise-vocoded speech, Hearing Research.
  • Nakajima, Y., Matsuda, M., Ueda, K., and Remijn, G. B. (2018). Temporal resolution needed for auditory communication: Measurement with mosaic speech, Frontiers in Human Neuroscience, 12(149). doi:10.3389/fnhum.2018.00149
  • Nakajima, Y., Ueda, K., Remijn, G. B., Yamashita, Y., and Kishida, T. (2018). How sonority appears in speech analyses, Acoustical Science and Technology, 39, 3, 179-181 (Invited Review), doi:10.1250/ast.39.179.
  • Ueda, K., Nakajima, Y., Ellermeier, W., and Kattner, F. (2017). Intelligibility of locally time-reversed speech: A multilingual comparison, Scientific Reports, 7: 1782, doi:10.1038/s41598-017-01831-z.
  • Nakajima, Y., Ueda, K., Fujimaru, S., Motomura, H., and Ohsaka, Y. (2017). English phonology and an acoustic language universal, Scientific Reports, 7, 46049; doi:10.1038/srep46049.
  • Ueda, K. and Nakajima, Y. (2017). An acoustic key to eight languages/dialects: Factor analyses of critical-band-filtered speech, Scientific Reports, 7, 42468; doi:10.1038/srep42468.
  • Kishida, T., Nakajima, Y., Ueda, K., and Remijn, G. B. (2016; 26 April 2016). Three factors are critical in order to synthesize intelligible noise-vocoded Japanese speech, Frontiers in Psychology, 7:517, 1-9 [doi: 10.3389/fpsyg.2016.00517].
  • Ellermeier, W., Kattner, F., Ueda, K., Doumoto, K., and Nakajima, Y. (2015). Memory disruption by irrelevant noise-vocoded speech: Effects of native language and the number of frequency bands, the Journal of the Acoustical Society of America, 138, 1561–1569 [http://dx.doi.org/10.1121/1.4928954].
  • Nakajima, Y., Sasaki, T., Ueda, K., Remijn, G. B. (2014). Auditory Grammar, Acoustics Australia, 42, 97-101. [URL]
  • Hasuo, E., Nakajima, Y., Tomimatsu, E., Grondin, S., and Ueda, K. (2014). The occurrence of the filled duration illusion: A comparison of the method of adjustment with the method of magnitude estimation, Acta Psychologica, 147, 111-121.
  • Yamashita, Y., Nakajima, Y., Ueda, K., Shimada, Y., Hirsh, D., Seno, T., and Smith, B. A. (2013). Acoustic analyses of speech sounds and rhythms in Japanese- and English-learning infants, Frontiers in Psychology, 4: 57, 1-10. doi: 10.3389/fpsyg.2013.00057
  • Hasuo, E., Nakajima, Y., and Ueda, K. (2011). Does filled duration illusion occur for very short time intervals? Acoustical Science and Technology, 32, 2, 82-85. (Letter) [URL]
  • Sasaki, T., Nakajima, Y., ten Hoopen, G., van Buuringen, E., Massier, B., Kojo, T., Kuroda, T., and Ueda, K. (2010). Time-stretching: Illusory lengthening of filled auditory durations, Attention, Perception, and Psychophysics, 72, 1404-1421.