Current Research and Collaborations

My main research interests are in how the brain processes the speech signal to understand the meaning of what was said. In this interdisciplinary work, I ask questions like

• How does sound map onto meaning? Are the levels and units of standard linguistic description essential to the process, or by-products of a more general pattern-matching process?

• What can sensory illusions tell us about the way the brain interprets the speech signal?

• How do perceptual responses vary according to the style of speech and the task participants are given?

My approach to answering these questions is to work with speech stimuli that are as natural as possible while still being tightly controlled phonetically, and to vary the task conditions in various ways.

My work links with psychology, speech recognition, and speech synthesis. From 2003-6 I held a Leverhulme Trust Major Research Fellowship to extend my work on speech perception into neuropsychology and computational modelling.

One outcome is Sound to Sense (S2S), a Marie Curie Research Training Network involving 13 institutions in 10 countries. We aim to bring together research on fine phonetic detail with computer modelling of human and machine speech recognition. This training programme for pre-and post-doctoral students started in May 2007 and runs until 2011.

Another outcome is collaboration with Antje Heinrich on an ERA AGE FLARE grant: Age-related changes in the use of linguistic cues for speech intelligibility in adverse listening conditions.

I welcome enquries from prospective PhD students interested in these and related areas.

Past research includes

• Contributions to speech synthesis for British English (Infovox and ProSynth systems);
• Acoustic correlates of distinctive features;
• Temporal coordination and rhythm in children’s speech.