Speech, Language, and Hearing Sciences Discovery with delivery as WE BUILD OUR FUTURE
It began with Dr. Mack Steer.. SLHS celebrates 75 years at Purdue since its beginning in the basement of University Hall
*The SLP Masters Program is ranked 2 nd and the Doctor of Audiology Program is ranked 9 th (U.S. News and World Report) * Doctoral programs/faculty productive - Ranked 3 rd Academic Analytics * Clinics - Over 4,000 patients seen per year in clinics served by SLHS graduate students and clinical faculty (15) and staff (2).
Discovery Research Examples ~ ½
The Cocktail Party Problem: How do we hear the speech we want to hear when other speech interferes? Dr. Alexander L. Francis What role is played by basic cognitive mechanisms? Working Memory Selective Attention Executive Control 8/22/2011 5
Experimental Amplification Dr. Joshua M. Alexander Research Lab Discovery of innovative sound processing techniques for delivery in hearing aids to improve speech understanding
Enhancing speech recognition for cochlear implant users Dr. Xin Lou Pre-processing of Input Speech Original speech with increasing tone Transmission Coil Perceptual Training Paradigms Envelope enhanced speech Percent Correct (%) 100 Tone Vowel Recognition Recognition 80 60 40 20 0 Original Enhanced OriginalEnhanced Speech Processor Electrode Array Percent Correct (%) 90 80 70 60 50 40 30 Pitch contour ID training 1 2 3 4 5 6 7 Training Day Percent Correct (%) 80 60 40 20 0 Sentence in quiet Sentence in noise Pre-test Post-test Pre-test Post-test Combining Electric and Acoustic Hearing + For patients with residual low-frequency acoustic hearing, hearing aid can be used together with cochlear implant to enhance speech recognition in noise Percent Correct (%) Recognition Threshold (db) 100 90 80 70 60 50 Consonant 40 8 CI Only250 500 750 1000 6 Sentence 4 2 0-2 -4 Tone Vowel CI Only 250 500 750 1000 Hearing Aid Cutoff Frequency (Hz) Advanced Pitch Coding Strategies Excitation pattern of current steering (1-α) I α =0 α =0.25 α =0.5 α =0.75 α =1 α I Identification of pitch contours created by current steering Percent Correct (%) 120 100 80 60 40 20 0 Apical Electrode Pair Medial Electrode Pair Basal Electrode Pair 100 200 300 500 1000 Duration (ms) When current is steered between simultaneously stimulated adjacent electrodes (with different α), CI users perceive distinctive intermediate pitch
Why are some individuals susceptible to voice disorders? Up to 9% of Americans have voice disorders Treatment of voice disorders costs millions of dollars annually. Dr. Preeti Sivasankar
Speech Physiology Laboratory Dr. Jessica Huber Goal: To develop a wearable device to treat speech problems experienced by individuals with Parkinson s Disease The loss of the ability to communicate is one of the biggest losses as a result of Parkinson s disease. (patient pictured)
Effects of cochlear implant experience on young deaf children s speech and language development Dr. David Ertmer
Infant Speech Perception Lab Dr. Amanda Seidl
Dr. Oliver Wendt Efficacy of AAC and Assistive Technology for developmental disabilities
Verb comprehension involves mentally simulating what it is like to perform the designated actions. Dr. David Kemmerer
Neural Systems for Language Processing Dr. Chris Weber-Fox Helping to identity the children who are most at risk for developing persistent stuttering.
Study of the effect of increasing language complexity on speech motor control in typical development and stuttering predictions for recovery and persistence Dr. Anne Smith
Delivery SLHS Clinics
Speech and Language Clinics Serving M.D. Steer Campus Clinics Clarian/Arnett Hospital & Clinics Lafayette Otolaryngology (Drs Berner & Hillsamer) Preschool Language Lab Program Morton Center Annual Statistics Total client visit >2000 340 Clients 180 Consultations 324 Clinical Research Subjects
Audiology Clinics Serving > 15 Indiana counties Only Audiology diagnostic provider for birth to three population in Tippecanoe and surrounding counties One of only 17 facilities statewide equipped to provide comprehensive infant assessments Serving the underserved through the Lions Club and Riggs Community Health Clinic Annual Statistics: Total patient visits > 2000 Pediatric patient visits ~ 500 Adult patient visits ~ 1500 Hearing aids dispensed ~ 100