Donald Derrick

Senior LecturerDonald Derrick

English 220
Internal Phone: 95941
I study influences speech production and perception from theoretical, applied, and commercial perspectives.


Research Interests

I study speech production and perception in order to identify what environmental, sensory and physical constraints on speech can enhance or interfere with speech perception.

I research how speech speech airflow contacting the skin enhances and interferes with speech perception, much as researchers have done with visual speech since the 1950s. This includes studying speech air flow production, skin respose to speech air flow touch, speech perception enhancement and interference, and brain responses from seeing, feeling, and feeling speech.

I also work on seemingly tiny constraints of speech production in order to understand when and how to account for low-level speech production variability. In so doing, I designed co-collection and co-registration of ultrasound imaging of the tongue and articulometry giving us both shape and point-tracking for the tongue. And in so doing, gained an improved understanding of the tongue's behaviour in speech in relation to gravity, speech rate, and tongue motion complexity.

My goal is to produce a multi-sensory model of speech perception that takes into account the relationship between audio, visual, and tactile speech signal strength, along with low-level speech production constraints.

Recent Publications

  • Derrick D., Duerr J. and Kerr RG. (2019) Mask-less oral and nasal audio recording and air flow estimation for speech analysis. Electronics Letters 55(1): 12-14.
  • Derrick D., Madappallimattam J. and Theys C. (2019) Aero-tactile integration during speech perception: Effect of response and stimulus characteristics on syllable identification. Journal of the Acoustical Society of America 146(3): 1605-1614.
  • Keough M., Derrick D. and Gick B. (2019) Cross-Modal Effects in Speech Perception. Annual Review of Linguistics 5: 49-66.
  • Derrick D., Carignan C., Chen W-R., Shujau M. and Best CT. (2018) Three-dimensional printable ultrasound transducer stabilization system. The Journal of the Acoustical Society of America 144(5): EL392-EL398.
  • Heyne M., Wang X., Derrick D., Dorreen K. and Watson KD. (2018) The articulation of /ɹ/ in New Zealand English. Journal of the International Phonetic Association Online First