Communication and Assistive Device Laboratory (CADL)
The CADL is dedicated to research and the clinical application of augmentative communication technologies for severely communicatively handicapped persons. The laboratory facilities include several microcomputers adapted for augmentative communication and assessment, a number of special-purpose electronic and communication aids, software, adaptive equipment, and pertinent literature. Current research in the CADL involves studies of keystroke efficiency of adapted word-processing systems, effects of different communication devices on social interaction and discourse processes, social perceptions of augmentative communicators and their partners, and development of software applications for augmentative communicators.
CADL is a part of the Center for Excellence in Augmented Communication (CEAC), which is dedicated to the provision of state-of-the-art services to persons with complex communication needs and committed to conducting and actively supporting relevant research, training, and client/family advocacy.
Director: Jeff Higginbotham, PhD
Room 106 Cary Hall
Room 137 Cary Hall
The Hearing Research Laboratories were originally established in 1988 for the purpose of studying the biological bases of hearing and deafness. The laboratories have expanded and evolved substantially since their inception, and are staffed with faculty, post-doctoral fellows, research associates, and students. The ongoing research is supported by state, federal, and private research grants. The laboratories provide a unique training environment for graduate students interested in hearing research. The laboratories include:
The directors and staff of these laboratories are core members of the Center for Hearing and Deafness. Visit the Center for Hearing and Deafness for more information on each of these laboratories.
Director: Kris Tjaden, PhD CCC-SLP
Room 108 Cary Hall
The Motor Speech Laboratory in Cary 108 investigates speech production deficits in persons with neurologic impairment, such as Parkinson's Disease and Multiple Sclerosis. The overall aim of this NIH-funded research is to describe the manner in which different types of neurologic lesions or dysarthrias affect speech. We also aim to identify therapeutic techniques most effective for maximizing intelligibility and speech naturalness in dysarthria - and the underlying speech production changes responsible for adjustments in intelligibility and naturalness. Temporal and spectral acoustic measures (i.e., voiceprints or spectrograms) are used to infer processes underlying speech articulation. Our most recent publications focus on how the overlapping of speech sounds - termed "coarticulation" - is affected in dysarthria. Other studies investigate and compare the effects of speech rate reduction, increased vocal loudness, and a faster than normal speech rate on intelligibility in dysarthria.
The lab is equipped with a sound-treated room for on-line recording of speakers, high fidelity microphones, microphone preamplifier, sound level meter, audio filters, and computer workstations equipped with specialized software for acoustic analyses. The laboratory also has equipment for quantifying air pressures and flows generated during speech.