David Purcell

David Purcell, PhD

Research Focus


Welcome to the SAFE Lab! We are located in the Faculty of Health Sciences in the National Centre for Audiology at the University of Western Ontario. Our research examines the human auditory system and the role that it plays in speech production. When we talk, the sound of our own voice is important in the accurate maintenance of speech. We study this by changing speech sounds in real-time and observing the influence on talking. We also study the auditory system by recording the sounds produced by the ear (otoacoustic emissions) or the electrical activity generated by the brain (auditory electrophysiology) in response to sound. Read on for some examples or browse the publication abstracts below! Feel free to contact Dr. Purcell if you have any questions. People associated with the lab past and present can be visited here!
Thesis based Masters and PhD degrees can be pursued in the SAFE Lab through the Hearing Science field in the Health & Rehabilitation Sciences Graduate Program or through the Graduate Program in Neuroscience. These research areas will be of interest to students from psychology, neuroscience, communication sciences, physiology, medical biophysics, life sciences, health sciences, or other related areas.
One of our interests is physiological measurements of auditory function such as otoacoustic emissions and steady-state auditory evoked potentials. We are interested in developing new ways of using the objective measurements that we have available, as well as relating these to performance in perceptual tasks. For example, we have developed methods of estimating auditory processing delays, as well as tools for evaluating the auditory brainstem's neural connections between ears. As well, we have studied how an individual's ability to detect amplitude modulation perceptually is related to their brain's ability to follow the modulated signal as measured electrophysiologically.

Publications

Title Source (Journal/Book/Conference) Authors/Presenters Published On Type
ASSRs Elicited by Varying Depths of Amplitude Modulation in Young and Elderly Subjects Association for Research in Otolaryngology Dimitrijevic A, Alsamri J, John MS, Purcell D, George S, Zeng F 1393045200 Abstract
ASSR Exploration of Amplitude Depth Modulation in Young and Elderly Humans International Evoked Response Audiometry Study Group Dimitrijevic A, Alsamri J, John MS, Purcell D, George S, Zeng F 1370750400 Presentation
Optimal Detection Paradigm using Sequential Testing for Auditory Steady State Response IERASG 2011 Choi J, Purcell D, John MS 1309320000 Presentation
Phase stability of auditory steady state responses in newborn infants Ear and Hearing Choi JM, Purcell DW, John MS 1293858000 Journal Article
Evaluating the modulation transfer function of auditory steady state responses in the 65 Hz to 120 Hz range Ear and Hearing Purcell DW, John MS 1270440000 Journal Article
Use of ASSR Phase in Newborn Hearing Testing International Evoked response Audiomety Study Group (IERASG) Choi JM, John MS, Purcell DW 1236056400 Presentation
Technical principles of auditory steady-state response testing Auditory Steady-State Response: Generation Recording, and Clinical Applications John MS, Purcell DW 1207368000 Book Chapter
Cortical responses to the 2f1-f2 combination tone measured indirectly using magnetoencephalography Journal of the Acoustical Society of America Purcell DW, Ross B, Picton TW, Pantev C 1180411200 Journal Article
Simultaneous latency estimations for distortion product otoacoustic emissions and envelope following responses Journal of the Acoustical Society of America Purcell DW, van Roon P, John MS, Picton TW 1136091600 Journal Article
Recording human evoked potentials that follow the pitch contour of a natural vowel IEEE Transactions on Biomedical Engineering Dajani HR, Purcell D, Wong W, Kunov H, Picton TW 1104555600 Journal Article
Human temporal auditory acuity as assessed by envelope following responses Journal of the Acoustical Society of America Purcell DW, John MS, Schneider BA, Picton TW 1101877200 Journal Article
Human auditory steady-state responses International Journal of Audiology Picton TW, John MS, Purcell DW, Dimitrijevic A 1054440000 Journal Article
Human auditory steady-state responses: The effects of recording technique and state of arousal Anesthesia & Analgesia Picton TW, John MS, Purcell DW, Plourde G 1041397200 Journal Article
Concurrent measurement of distortion product otoacoustic emissions and auditory steady state evoked potentials Hearing Research Purcell DW, John MS, Picton TW 1041397200 Journal Article
Relating objective and behavioral measures of temporal auditory acuity XVIII IERASG BIENNIAL SYMPOSIUM Purcell D, Picton T 1041397200 Presentation
Advantages and caveats when recording steady-state responses to multiple simultaneous stimuli Journal of the American Academy of Audiology John MS, Purcell DW, Dimitrijevic A, Picton TW 1009861200 Journal Article
Estimating the audiogram using multiple auditory steady-state responses Journal of the American Academy of Audiology Dimitrijevic A, John MS, van Roon P, Purcell DW, Adamonis J, Ostroff J, Nedzelski JM, Picton TW 1009861200 Journal Article

Contact

NCA
National Centre for Audiology
School of Communication Sciences and Disorders
Faculty of Health Sciences
University of Western Ontario Phone: (519) 661-2111 x80435 Email: purcelld@nca.uwo.ca Fax: (519) 661-3805